U.S.

NUCLEAR REGULATORY COMMISSION Revision 33

August 2005

REGULATORY GUIDE
OFFICE OF NUCLEAR REGULATORY RESEARCH

REGULATORY GUIDE 1.84

(Draft was issued as DG-1124, dated August 2004)

DESIGN, FABRICATION, AND MATERIALS CODE CASE

ACCEPTABILITY, ASME SECTION III

A. INTRODUCTION

General Design Criterion (GDC) 1, “Quality Standards and Records,” of Appendix A, “General Design
Criteria for Nuclear Power Plants,” to Title 10, Part 50, of the Code of Federal Regulations (10 CFR Part 50),
“Domestic Licensing of Production and Utilization Facilities,” requires, in part, that structures, systems, and
components important to safety be designed, fabricated, erected, and tested to quality standards commensurate with
the importance of the safety function to be performed. Where generally recognized codes and standards are used,
Criterion 1 requires that they be identified and evaluated to determine their applicability, adequacy, and sufficiency
and be supplemented or modified as necessary to ensure a quality product in keeping with the required safety
function.

Criterion 30, “Quality of Reactor Coolant Pressure Boundary,” of Appendix A requires, in part,
that components that are part of the reactor coolant pressure boundary be designed, fabricated, erected, and tested
to standards of the highest practical quality standards.

Appendix B, “Quality Assurance Criteria for Nuclear Power Plants and Fuel Processing Plants,”
to 10 CFR Part 50 requires, in part, that measures be established for the control of special processing of materials
and that proper testing be performed.

This regulatory guide identifies the Code Cases that have been determined by the NRC to be acceptable alternatives to applicable parts of Section III. The latest editions
and addenda of Section III that the U.S. Nuclear Regulatory Commission (NRC) has approved for use are referenced in 10 CFR 50.55a(b).

This guide was issued after consideration of comments received from the public. The NRC staff encourages and welcomes comments and suggestions in connection
with improvements to published regulatory guides, as well as items for inclusion in regulatory guides that are currently being developed. The NRC staff will revise existing
guides, as appropriate, to accommodate comments and to reflect new information or experience. Written comments may be submitted to the Rules and Directives Branch,
Office of Administration, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001.

Regulatory guides are issued in 10 broad divisions: 1, Power Reactors; 2, Research and Test Reactors; 3, Fuels and Materials Facilities; 4, Environmental and Siting;
5, Materials and Plant Protection; 6, Products; 7, Transportation; 8, Occupational Health; 9, Antitrust and Financial Review; and 10, General.

Requests for single copies of draft or active regulatory guides (which may be reproduced) should be made to the U.S. Nuclear Regulatory Commission, Washington, DC
20555, Attention: Reproduction and Distribution Services Section, or by fax to (301) 415-2289; or by email to Distribution@nrc.gov. Electronic copies of this guide and
other recently issued guides are available through the NRC’s public Web site under the Regulatory Guides document collection of the NRC’s Electronic Reading Room
at http://www.nrc.gov/reading-rm/doc-collections/ and through the NRC’s Agencywide Documents Access and Management System (ADAMS) at
http://www.nrc.gov/reading-rm/adams.html, under Accession No. ML052130562. Note, however, that the NRC has temporarily suspended public access to ADAMS so
that the agency can complete security reviews of publicly available documents and remove potentially sensitive information. Please check the NRC’s Web site for updates
concerning the resumption of public access to ADAMS.
 Provisions of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel
(BPV) Code have been used since 1971 as one part of the framework to establish the necessary design,
fabrication, construction, testing, and performance requirements for structures, systems, and components
important to safety. Among other things, ASME standards committees develop improved methods
for the construction and inservice inspection (ISI) of ASME Class 1, 2, 3, MC (metal containment),
and CC (concrete containment) nuclear power plant components. A broad spectrum of stakeholders
participates in the ASME process, which helps to ensure that the various interests are considered.

The regulation in 10 CFR 50.55a(c), “Reactor Coolant Pressure Boundary,” requires, in part,
that components of the reactor coolant pressure boundary must be designed, fabricated, erected,
and tested in accordance with the requirements for Class 1 components of Section III, “Rules for
Construction of Nuclear Power Plant Components,”1 of the ASME BPV Code or equivalent quality
standards. The ASME publishes a new edition of the BPV Code, which includes Section III,
every 3 years, and new addenda every year. The latest editions and addenda of Section III that the
U.S. Nuclear Regulatory Commission (NRC) has approved for use are referenced in 10 CFR 50.55a(b).
The ASME also publishes Code Cases quarterly. Code Cases provide alternatives developed and
approved by ASME or explain the intent of existing Code requirements. This regulatory guide identifies
the Code Cases that have been determined by the NRC to be acceptable alternatives to applicable parts of
Section III. Section III Code Cases not yet endorsed by the NRC may be implemented through
10 CFR 50.55a(a)(3), which permits the use of alternatives to the Code requirements referenced in
10 CFR 50.55a provided that the proposed alternatives result in an acceptable level of quality and safety,
and that their use is authorized by the Director of the Office of Nuclear Reactor Regulation.

The ASME Code is incorporated by reference into 10 CFR 50.55a. Code Cases approved by the
NRC provide an acceptable voluntary alternative to the mandatory ASME Code provisions. Therefore,
the NRC is amending 10 CFR 50.55a to incorporate by reference this guide listing new Code Cases,
revisions to existing Code Cases, and the requirements governing their use. Because of the continuing
change in the status of Code Cases, the NRC plans periodic updates to 10 CFR 50.55a and this guide to
accommodate new Code Cases and any revisions of existing Code Cases.

This regulatory guide does not contain a new or amended information collection requirement
subject to the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). The existing information
collections are covered by the requirements of 10 CFR Part 50, which the Office of Management
and Budget (OMB) approved under OMB control number 3150-0011. The NRC may neither conduct
nor sponsor, and a person is not required to respond to, an information collection request or requirement
unless the requesting document displays a currently valid OMB control number.

1
Copies may be obtained from the American Society of Mechanical Engineers, Three Park Avenue, New York, NY
10016-5990; phone (212) 591-8500; fax (212) 591-8501; www.asme.org.

RG 1.84, Rev. 33, Page 2

 B. DISCUSSION
All Section III Code Cases approved for use by the NRC are listed in Regulatory Guide 1.84.
For Revision 33 to the guide, the NRC staff reviewed Section III Code Cases listed in Supplement 12
to the 1998 Edition of the ASME B&PV Code through Supplement 6 to the 2001 Edition.2 Appendix A
to the guide lists the supplements reviewed, the applicable edition, and the date on which each
supplement was approved by the ASME’s Board on Nuclear Codes and Standards. Appendix B is a list
of the Section III Code Cases addressed in the seven supplements. Finally, Appendix C is a current list
of all Section III Code Cases. The Code Cases addressed by this regulatory guide are listed in five tables:
(1) Table 1, “Acceptable Section III Code Cases,” contains the Code Cases that are acceptable to the
NRC for application in the design and construction of light-water-cooled nuclear power plants.
(2) Table 2, “Conditionally Acceptable Section III Code Cases,” contains Code Cases that are
acceptable provided that they are used with the identified limitations or modifications
(i.e., the Code Case is generally acceptable, but the NRC has determined that the alternative
requirements must be supplemented in order to provide an acceptable level of quality and safety).
(3) Table 3, “Annulled Unconditionally Approved Section III Code Cases,” contains the Code Cases
that have been annulled by the ASME.
(4) Table 4, “Annulled Conditionally Acceptable Section III Code Cases,” contains the Code Cases
that the NRC determined to be acceptable provided that they were used with the identified
limitations or modifications, but that the ASME subsequently annulled.
(5) Table 5, “Section III Code Cases That Have Been Superseded by Revised Code Cases
on or After July 1, 1974,” lists Code Cases that have been superseded through revision.

Code Cases that the NRC determined to be unacceptable are listed in Regulatory Guide 1.193,
“ASME Code Cases Not Approved for Use.”

Code Cases provide alternatives to existing Code requirements that the ASME developed and
approved. The new Code Cases and revisions to existing Code Cases listed as approved in Tables 1
and 2 of this guide will be incorporated by reference into 10 CFR 50.55a. Code Cases approved
by the NRC may be used voluntarily by licensees as an alternative to compliance with ASME Code
provisions that have been incorporated by reference into 10 CFR 50.55a.

Requirements related to implementation of Code Cases are provided in 10 CFR 50.55a(b).

When a licensee initially applies a Code Case listed in Table 1 or 2, the licensee must implement
the most recent version of that Code Case incorporated by reference in 10 CFR 50.55a.

2
Except for Code Cases pertaining to high-temperature gas-cooled reactors; certain requirements in Section III,
Division 2, not endorsed by the NRC; liquid metal; and submerged spent fuel waste casks.

RG 1.84, Rev. 33, Page 3

 Code Cases may expire or be annulled because the provisions have been incorporated into the
Code, the application for which it was specifically developed no longer exists, or experience has shown
that the design analysis or construction method is no longer adequate. After the ASME annuls a
Code Case and the NRC amends 10 CFR 50.55a and this guide, licensees may not implement that
Code Case for the first time. However, a licensee who implemented the Code Case prior to annulment
may continue to use that Code Case until the licensee voluntarily updates its Section III Code of record.
If a Code Case is incorporated by reference into 10 CFR 50.55a and later annulled by the ASME because
experience has shown that the design analysis or construction method is no longer adequate, the NRC
will amend 10 CFR 50.55a and this guide to remove the approval of the annulled Code Case. Licensees
should not begin to implement such annulled Code Cases in advance of the rulemaking. Notwithstanding
these requirements, the Commission may impose new or revised Code requirements, including
implementation schedules, that it determines are consistent with the backfit rule (10 CFR 50.109).

With regard to the use of any Code Case, it is the responsibility of the user to make certain that
the provisions of the Code Case do not conflict with licensee commitments or regulatory requirements.

RG 1.84, Rev. 33, Page 4

 C. REGULATORY POSITION
1. Acceptable Code Cases

The Code Cases listed in Table 1 below are acceptable to the NRC for application in the design
and construction of components and their supports for water-cooled nuclear power plants. The ASME
issues a new edition of Section III every 3 years. Code Cases are published quarterly in supplements to
each edition. Hence, there are 12 supplements to each edition. Column 3 of Table 1 lists the date of
ASME approval or the supplement and edition in which each Code Case was published (e.g., 3/01E
means Code Case Supplement 3 to the 2001 Edition).

Table 1. Acceptable Section III Code Cases

Code Case Table 1. Acceptable Code Cases Date or

Number Supplement/Edition

N-4-11 Special Type 403 Modified Forgings or Bars, Section III, Division 1, 2/25/02
Class 1 and CS

N-7-1 High Yield Strength Steel, Section III, Division 1, Class 1 3/3/00

N-60-5 Material for Core Support Structures, Section III, Division 1 9/7/01

N-122-2 Procedure for Evaluation of the Design of Rectangular Cross 1/17/00

Section Attachments on Class 1 Piping, Section III, Division 1

N-131-1 Material for Internal Pressure Retaining Items for Pressure Relief 3/3/00
(1759-1) Valves, Section III, Division 1, Class 1, 2, and 3

N-133-3 Use of SB-148 Alloys 952 and 954, Section III, Division 1, Class 3 1/17/00

N-154-1 Projection Resistance Welding of Valve Seats, Section III, Division 1, 3/3/00
Classes 1, 2, and 3

N-160-1 Finned Tubing for Construction, Section III, Division 1 1/17/00

N-171 Postweld Heat Treatment of P-No. 1 Material, Section III, Division 2 4/30/93

N-192-3 Use of Braided Flexible Connectors, Section III, Division 1, Class 2 5/01E
and 3

N-205 Use of Ductile Iron SA-395, Section III, Division 1, Class 3 2/25/02

N-213 Welded Radial Shear Bar Assemblies, Section III, Division 2 2/25/02

N-243 Boundaries Within Castings Used for Core Support Structures, 5/26/97
Section III, Division 1, Class CS

N-315 Repair of Bellows, Section III, Division 1 3/3/00

N-318-5 Procedure for Evaluation of the Design of Rectangular Cross 5/26/97

Section Attachments on Class 2 or 3 Piping, Section III, Division 1

N-319-3 Alternate Procedure for Evaluation of Stresses in Butt Welding 1/17/00

Elbows in Class 1 Piping, Section III, Division 1

N-329 Examination of Bar Material, Section III, Division 1, Class 1 7/23/02

RG 1.84, Rev. 33, Page 5

 Code Case Table 1. Acceptable Code Cases Date or
Number Supplement/Edition

N-351 Use of Subsize Charpy V-Notch Specimens, Section III, Division 1 1/17/00

N-369 Resistance Welding of Bellows, Section III, Division 1 10/2/00

N-373-2 Alternative PWHT Time at Temperature for P-No. 5 Material, 3/01E

Section III, Division 1, Classes 1, 2, and 3

N-391-2 Procedure for Evaluation of the Design of Hollow Circular Cross 8/14/01
Section Welded Attachments on Class 1 Piping, Section III,
Division 1

N-392-3 Procedure for Evaluation of the Design of Hollow Circular Cross 3/28/01
Section Welded Attachments on Classes 2 and 3 Piping, Section III,
Division 1

N-405-1 Socket Welds, Section III, Division 1 3/28/01

N-438-1 UNS N08367, Section III, Division 1, Class 2 and 3 Construction ASME Reinstated on
5/24/96

N-452 Specialized Subcontracted Welding Process (Electron Beam 10/2/00

Welding), Section III, Division 1

N-453-3 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS 8/14/01

N08925) for Class 2 and 3 Construction, Section III, Division 1

N-454-1 Nickel-Chromium-Molybdenum-Copper Stainless Steels (UNS 10/2/00

N08925 and N08926) Wrought Fittings for Class 2 and 3
Construction, Section III, Division 1

N-455-1 Nickel-Chromium-Molybdenum-Copper Stainless Steels (UNS 10/2/00

N08925 and N08926) Forged Flanges and Fittings for Class 2 and 3,
Section III, Division 1

N-464 Laser Welding of Lap Joints, Section III, Division 1, Classes 2 and 3 10/2/00
Construction

N-469-1 Martensitic Stainless Steel for Class 1, 2, and 3 Components, 10/2/00

Section III, Division 1

N-493 Alternative Radiographic Acceptance Criteria for Vessels Used 7/23/02

as Shipping Casks, Section III, Division 1, Class 1

N-505 Alternative Rules for the Examination of Butt Welds Used as Closure 3/28/01
Welds for Electrical Penetration Assemblies in Containment
Structures, Section III, Division 1

N-511 Design Temperature for Atmospheric and 0-15 psi Storage Tanks, 9/7/01
Section III, Division 1

N-520-1 Alternative Rules for Renewal of N-type Certificates for Plants 8/14/97
Not in Active Construction, Section III, Division 1

N-525 Design Stress Intensities and Yield Strength Values for UNS N06690 7/23/02
With a Minimum Specified Yield Strength of 30 ksi, Class 1
Components, Section III, Division 1

RG 1.84, Rev. 33, Page 6

 Code Case Table 1. Acceptable Code Cases Date or
Number Supplement/Edition

N-539 UNS N08367 in Class 2 and 3 Valves, Section III, Division 1 3/28/01

N-548 Air Cooling of SA-182 Grades F304, F304L, F316, F316L Forgings 9/7/01
Instead of Liquid Quenching After Solution Heat Treatment, Class 1,
2, and 3, Section III, Division 1

N-558 Stamping of Class 2 Vessels Fabricated to Subsection NB, 2/25/02

Section III, Division 1

N-564-2 UNS J93380, Alloy CD3MWCuN, Class 2 and 3 Construction, 1/17/00

Section III, Division 1

N-570 Alternative Rules for Linear Piping and Linear Standard Supports 2/25/02
for Class 1, 2, 3, and MC, Section III, Division 1

N-572 Use of SB-425 (UNS N08825) Bar and Rod for Class 1 Construction, 7/23/02
Section III, Division 1

N-579 Use of Nonstandard Nuts, Class 1, 2, and 3, MC, CS Components 8/14/97

and Supports Construction, Section III, Division 1

N-580-1 Use of Alloy 600 With Columbium Added, Section III, Division 1 5/20/98

N-594 Repairs to P-4 and P-5A Materials for Pumps and Valves Without 3/28/01
Postweld Heat Treatment, Section III, Division 1

N-596 Use of Alternative Reference Specimens, Section III, Division 1 3/28/01

N-607 Guidance on Implementation of NS Certificate of Accreditation, 9/7/01

Section III, Division 1

N-610 Alternative Reference Stress Intensity Factor (K1R) Curve for 7/30/98
Class Components, Section III, Division 1

N-611 Use of Stress Limits as an Alternate to Pressure Limits 7/30/98

Subsection NC/ND-3500, Section III, Division 1

N-620 Rules for Class 1 Type M Pumps, Section III, Division 1 2/26/99

N-621 Ni-Cr-Mo Alloy (UNS N06022) Welded Construction to 800EF, 2/26/99

Section III, Division 1

N-625-1 Ni-Cr-Mo Alloy (UNS N06059) Welded Construction to 800EF, 1/01E

Section III, Division 1

N-631 Use of Fracture Toughness Test Data to Establish Reference 7/23/02

Temperature for Pressure Retaining Materials Other Than Bolting
for Class 1 Vessels, Section III, Division 1

N-632 Use of ASTM A 572, Grades 50 and 65 for Structural Attachments 11/11/99
to Class CC Containment Liners, Section III, Division 2

N-635 Use of 22Cr-5Ni-3Mo-N (Alloy UNS S31803) Forgings, Plate, Bar, 7/23/02
Welded and Seamless Pipe, and/or Tube, Fittings, and Fusion
Welded Pipe With Addition of Filler Metal, Classes 2 and 3,
Section III, Division 1

RG 1.84, Rev. 33, Page 7

 Code Case Table 1. Acceptable Code Cases Date or
Number Supplement/Edition

N-636 Use of 18Cr-13Ni-3Mo (Alloy UNS S31703), 19Cr-15Ni-4Mo (Alloy 7/23/02

UNS S31725), and 18.5Cr-15.5Ni-4.5Mo-N (Alloy UNS S31726)
Forgings, Seamless Tubing, Plate, Welded Tubing, Welded and
Seamless Pipe, Welded Pipe With Addition of Filler Metal and
Fittings, Classes 2 and 3, Section III, Division 1

N-637 Use of 44Fe-25Ni-21Cr-Mo (Alloy UNS N08904) Plate, Bar, 9/24/99

Fittings, Welded Pipe, and Welded Tube, Classes 2 and 3,
Section III, Division 1

N-642 Alternative Rules for Progressive Liquid Penetrant Examination of 3/3/00

Groove Welds In P-No. 8 Materials 3/16 in. (5 mm) Thick and Less
Made by Autogenous Machine or Automatic Welding, Section III,
Division 1

N-646 Alternative Stress Intensification Factors for Circumferential Fillet 12/8/00

Welded or Socket Welded Joints for Class 2 or 3 Piping, Section III,
Division 1

N-650 Use of SA-537, Class 2 Plate Material in Non-Pressure Boundary 12/98E

Application Service 700EF to 850EF, Class 1 or CS, Section III,
Division 1

N-657 Use of the N-1A Data Report for Spent Fuel Canisters, Section III, 4/01E
Division 1

RG 1.84, Rev. 33, Page 8

2. Conditionally Acceptable Section III Code Cases

The Code Cases listed in Table 2 below are acceptable to the NRC for application in the design
and construction of components and their supports for water-cooled nuclear power plants within the
limitations indicated by the NRC. Unless otherwise stated, limitations indicated by the NRC are
in addition to the conditions specified in the Code Case. The ASME issues a new edition of Section III
every 3 years. Code Cases are published quarterly in supplements to each edition. Hence, there are 12
supplements to each edition. Column 3 of Table 1 lists the date of ASME approval or the supplement and
edition in which each Code Case was published (e.g., 3/01E means Code Case Supplement 3 to the 2001
Edition).

Table 2. Conditionally Acceptable Section III Code Cases

Code Case Table 2. Conditionally Acceptable Code Cases Date or

Number Supplement/Edition
Title/Condition

N-62-7 Internal and External Valve Items, Section III, Division 1, Classes 1, 1/17/00
2, and 3

The Code requires that Class 1 and Class 2 valve manufacturers meet
the provisions of NCA-4000, “Quality Assurance.” Class 3 valve
manufacturers must also meet the provisions of NCA-4000 because all
Code Class valve items are subject to the licensee’s 10 CFR Part 50,
Appendix B approved QA program.

N-71-18 Additional Materials for Subsection NF, Class 1, 2, 3, and MC 12/98E

Component Supports Fabricated by Welding, Section III, Division 1

(1) The maximum measured ultimate tensile strength (UTS) of the

component support material must not exceed 170 Ksi in view of
the susceptibility of high-strength materials to brittleness and
stress corrosion cracking.
(2) Certain applications may exist where a UTS value of up to 190
Ksi could be considered acceptable for a material and, under this
condition, the Design Specification must specify impact testing
for the material. For these cases, it must be demonstrated by the
applicant that:
(a) the impact test results for the material meet Code
requirements,
(b) the material is not subject to stress corrosion cracking by
virtue of the fact that:
(i) a corrosive environment is not present, and
(ii) the component that contains the material has essentially
no residual stresses or assembly stresses, and
(iii) it does not experience frequent sustained loads in
service.

RG 1.84, Rev. 33, Page 9

Code Case Table 2. Conditionally Acceptable Code Cases Date or
Number Supplement/Edition
Title/Condition

N-71-18 Additional Materials for Subsection NF, Class 1, 2, 3, and MC 12/98E

(cont’d) Component Supports Fabricated by Welding, Section III, Division 1

(3) In the last sentence of paragraph 5.3, reference must be made to

paragraph 4.5.2.2, “Alternate Atmosphere Exposure Time
Periods Established by Test,” of the AWS D.1.1 Code for the
evidence presented to and accepted by the Authorized Inspector
concerning exposure of electrodes for longer periods of time.
(4) Paragraph 16.2.2 is not acceptable as written and must be
replaced with the following: “When not exempted by 16.2.1
above, the postweld heat treatment must be performed in
accordance with NF-4622 except that ASTM A-710 Grade A
Material must be at least 1000EF (540EC) and must not exceed
1150EF (620EC) for Class 1 and Class 2 material and 1175EF
(640EC) for Class 3 material.
(5) The new holding time at temperature for weld thickness
(nominal) must be 30 minutes for ½ inch or less, 1 hour per inch
for thickness over ½ inch to 5 inches, and for thicknesses over 5
inches, 5 hours plus 15 minutes for each additional inch over 5
inches.
(6) The fracture toughness requirements as listed in this Code Case
apply only to piping supports and not to Class 1, Class 2, and
Class 3 component supports.

N-155-2 Fiberglass Reinforced Thermosetting Resin Pipe, Section III, 1/17/00

Division 1

(1) The design temperature for spray pond piping must be 100EC
(212EF).
(2) The allowable design stress must be the value obtained from the
minimum hydrostatic design basis (HDB) in Table 3611-1 of
Code Case N-155-2 (Procedure A or B) or the value determined
as one-sixth of the stress obtained from a short-time burst test for
the pipe being qualified, whichever is lower. The short-time
burst strength must be determined by bursting the pipe (ASTM
D-1599-74) using free-end mounting after it has been exposed to
105 pressure cycles from atmospheric to design pressure.
(3) The value of “K” in equation 9 of paragraph 3652 must be
limited to 1.2 unless it can be demonstrated that with the use of a
large value of K1 the functional capability of the system will not
be impaired during upset and emergency conditions.
(4) RTR piping must be uninsulated or uncovered and installed
under conditions that make it readily accessible for inspection.
(5) Preoperational and inservice inspections must be as follows:
(a) During the preoperational testing period, tests must be made to
verify that the piping is free of vibration induced by weather
conditions or water flow that could fatigue the piping
prematurely;

RG 1.84, Rev. 33, Page 10

Code Case Table 2. Conditionally Acceptable Code Cases Date or
Number Supplement/Edition
Title/Condition

N-155-2 Fiberglass Reinforced Thermosetting Resin Pipe, Section III, 1/17/00

(cont’d) Division 1

(b) Fiberglass-reinforced piping components must be inspected in

accordance with ASME Code, Section XI, for Code Class 3
components. In addition, all pipe supports must be inspected;
(c) Inspection frequency for piping must be increased to once
annually if an exterior weather-resistant coating is not provided.

N-249-14 Additional Materials for Subsection NF, Class 1, 2, 3, and MC 12/98E

Component Supports Fabricated Without Welding, Section III,
Division 1

(1) The fracture toughness requirements apply only to piping

supports and not to Class 1, Class 2, and Class 3 component
supports.
(2) The following is to be added to paragraph (e) of the Code Case:
(a) “For these cases, it must be demonstrated by the Owner that:
(i) the impact test results for the material meet Code
requirements, and (ii) the material is not subject to stress
corrosion cracking by virtue of the fact that: a corrosive
environment is not present; the component that contains the
material has essentially no residual stresses or assembly stresses;
and it does not experience frequent sustained loads in service.”

N-292 Depositing Weld Metal Prior to Preparing Ends for Welding, 3/28/01
Section III, Division 1, Class 1, 2, and 3

Class 3 piping that is longitudinally welded and that has a weld

efficiency factor of 1.0 as selected from Table ND-3613.4-1, “Weld
Joint Efficiency Factor,” must receive a 100 percent volumetric
examination (RT or UT) of the deposited weld metal in accordance
with the requirements of ND-5000, “Examination.”

N-500-1 Alternative Rules for Standard Supports for Class 1, 2, 3, and MC, 5/20/98
Section III, Division 1

(1) The requirements of NF-3330, “High Cycle Fatigue Design for

Class 1,“ must be met for Class 1 Standard Supports for fatigue
consideration.
(2) The requirements of NF-3225, “Design of Bolting,” and
NF-3324.6, “Design Requirements for Bolted Joints,” must be
met for bolted joints.

RG 1.84, Rev. 33, Page 11

 Code Case Table 2. Conditionally Acceptable Code Cases Date or
Number Supplement/Edition
Title/Condition

N-626 Use of Plastic Analysis for the Design of Type B Containment 7/23/02
Components for Nuclear Material Transportation Casks, Section III,
Division 3

(1) For the acceptability of a design by analysis, Paragraph

WB-3211, “Requirements for Acceptability,” of Section III,
Division 3, Subsection WB, “Class TP (Type B) Containment,”
Subparagraphs (a) through (d) must be applied.
(2) There is a typographical error in the title of Paragraph (a)(2) of
the Code Case. Paragraph WB-3277 does not exist. Paragraph
WB-3227, “Applications of Inelastic Analysis Procedures,” of
Section III, Division 3, Subsection WB, “Class TP (Type B)
Containment,” is to be used.
(3) The first paragraph of WB-3324, “Design for Local Puncture
Associated with a Hypothetical Accident Condition,” of
Section III, Division 3, Subsection WB, “Class TP (Type B)
Containment,” must be applied. The second paragraph of WB-
3324 may be applied. In lieu of the third paragraph of WB-3324,
the following may be applied: “In lieu of the application of the
equation for outer shell thickness (treq) the response of the
containment boundary to puncture test loadings may be evaluated
using plastic analysis according to the rules in Appendix F,
“Rules for Evaluation of Service Loadings with Level D Service
Limits.”

N-655 Use of SA-738, Grade B, for Metal Containment Vessels, Class MC, 4/01E
Section III, Division 1

For metal containment vessels up to 1.75 inch thick:

(1) Supplementary Requirement S17, “Vacuum Carbon-Deoxidized
Steel,” of Material Specification SA-738 must be applied to the
material, and
(2) Supplementary Requirement S20, “Maximum Carbon Equivalent
for Weldability,” of Material Specification SA-738 must be
applied to the material.

N-656 Rules for the Construction of Inner Transportation Containments, 4/01E

Section III, Division 3

The inner transportation containment must contain only solid and dry
material.

3. Annulled Unconditionally Approved Section III Code Cases

The Code Cases listed in the table below were previously unconditionally approved by the NRC
and have been annulled by the ASME.

RG 1.84, Rev. 33, Page 12

 Table 3. Annulled Unconditionally Approved Section III Code Cases

Code Case Table 3. Annulment Date

Number Annulled Unconditionally Approved Code Cases

N-1-7 Requirements for Steel Forgings, Section III, Division 1 7/1/82

(1332-7)

N-2 Requirements for Corrosion-Resisting Steel Bars and Shapes, 1/1/81

(1334-3) Section III

N-3-10 Requirements for Bolting Materials, Section III 9/16/84

(1335-10)

N-5-1 Nickel Chromium Age Hardenable Alloys (Alloy X750), Section III, 12/13/85
Division 1, Classes 1, 2, 3, MC, and CS

N-6 Requirements for Nickel-Molybdenum-Chromium-Iron Alloys, 3/1/79

(1345-2) Section III

N-9-4 SA-508, Class 2 Forgings with Modified Manganese Content, 7/1/82

(1395-4) Section III

N-10 Time of Examination for Classes, 1, 2, and 3, Section III Vessels 9/17/87
(1407-3)

N-15 Substitution of Ultrasonic Examination for Progressive Penetrant or 3/1/79

(1456-2) Magnetic Particle Examination of Partial Penetration and Oblique
Nozzle Attachment Welds, Section III

N-17 Integrally Finned Tubes for Section III 1/21/91

(1474-1)

N-20-4 SB-163, Cold Worked UNS N08800; and SB-163 UNS N06600, UNS 9/18/01
N06690, and UNS N08800 to Supplementary Requirements S2 of SB-
163, Section III, Division 1, Class 1

N-22 SA-508-Class 2 and 3, Minimum Tempering Temperature, Section III 7/1/82

(1498-1)

N-24 Welding of Seats or Minor Internal Permanent Attachments in Valves 1/1/80

(1516-2) for Section III Applications

N-26 Integrally Finned Tubes, Section III 1/21/91

(1527)

N-30-1 Metal Bellows and Metal Diaphragm Stem Sealed Valves, Section III, 1/1/81
(1539-1) Division 1, Classes 1, 2, and 3

N-32-3 Hydrostatic Testing of Embedded Class 2 and Class 3 Piping for 7/1/79
(1541-3) Section III, Division 1 Construction

N-33 Type 403 Forgings or Bars for Bolting Material, Section III 1/21/85
(1542-1)

N-35-1 Design by Analysis of Section III, Class 1 Valves 7/1/79

(1552-1)

RG 1.84, Rev. 33, Page 13

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-37-3 Steel Products Refined by Secondary Remelting, Section III and VIII, 7/1/82
(1557-3) Division 1 and 2

N-41 Additional Material for SA-234 Carbon Steel Fittings, Section III 1/21/85
(1571)

N-43 SB-167 Nickel-Chromium-Iron (Alloy 600) Pipe or Tube, Section III 7/1/82
(1578)

N-46 Electro-Etching of Section III Code Symbols 3/19/82

(1588)

N-48-2 Fabrication and Installation of Elevated Temperature Components, 7/1/96

Section III, Division 1

N-49-4 Examination of Elevated Temperature Nuclear Components, 7/1/96

Section III, Class 1

N-50-1 Testing of Elevated Temperature Components, Section III, Division 1, 7/1/96

Class 1

N-51-2 Protection Against Overpressure of Elevated Temperature 7/1/96

Components, Section III, Division 1, Class 1

N-55-1 Inertia and Continuous Drive Friction Welding, Section III, 4/5/87
(1609) Division 1

N-56 Use of Type 308 Stainless Steel Rod and Bar for Section III, Class 1, 7/1/78
(1612) 2, 3, and CS Construction

N-61 Stress Category for Partial Penetration Welded Penetrations, 1/8/82

(1620) Section III, Class Construction

N-65-1 Normalized and Tempered 1-1/4 Cr Low Alloy Steel Forgings, 1/21/85
(1626-1) Section I and III

N-66-1 External Pressure Charts for High Yield Strength Carbon Steels and 12/5/87
(1630-1) Low Alloy Steels (Yield Strength above 38 Ksi to 60 Ksi Inclusive)
for Section III, Class 1, 2, 3, and MC

N-68 Use of SB-359 for Section III, Division, 1, Class 3 Construction 7/1/78
(1634-2)

N-77 Overpressure Protection Under Emergency Operating Conditions for 7/1/77

(1660) Section III, Class 1

N-81 Pressure-Temperature Ratings for Class 1 Valves Made from 7/1/78

(1665) 5 Cr-1/2 Mo, Section III

N-82 Clarification of Flange Design Loads, Section III, Class 1, 2, and 3 3/1/79
(1677)

N-84 Organizations Accepting Overall Responsibility for Section III 3/1/79

(1681-1) Construction

RG 1.84, Rev. 33, Page 14

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-90 Rules for Design of Welded Class 1 Pumps 7/1/78

(1692)

N-94 Determination of Capacities of Liquid Relief Valves, Section III, 3/19/82

(1700) Division 1, Class 1, 2, and 3

N-95-2 Determination of Capacities of Vacuum Relief Valves, Section III, 7/9/82

(1701-2) Division 1, Classes 2, 3, and MC and Division 2 Concrete
Containments

N-96-1 Flanged Valves Larger than 24 inches for Section III, Division 1, 1/1/80
(1702-1) Class 1, 2, and 3 Construction

N-101 Nameplates and Stamping for Section III, Division 1, Class 1, 2, 3 3/1/79
(1712) and MC Construction as Referenced in NA-8300

N-102-2 Postweld Heat Treatment of P-1 Material, Section III, Class MC 6/30/84

N-107-1 Vacuum, Carbon Deoxidized SA-508 Forgings, Section III, 1/8/82

(1722-1) Division 1

N-108 Deviation from the Specified Silicon Ranges in ASME Material 7/1/78
(1724) Specifications, Section III, Division 1, and VIII, Division 1 and 2

N-109 Refinement of Low Alloy Steel Heat Affected Zone Under Overlay 3/1/79
(1726) Cladding, Section III, Division 1, Class 1 Components

N-111 Minimum Edge Distance-Bolting for Section III, Division 1, Class 1, 3/1/79
(1729) 2, and 3 and MC Construction of Component Supports

N-114 Hardsurfaced Valves with Inlet Connections less than 2-in. Nominal 1/1/79
(1732) Pipe Size for Section III, Division 1, Class 1 and 2 Construction

N-115 Evaluation of Safe Shut Down Earthquake Loadings for Section III, 1/1/78
(1733) Division 1, Class MC Containment Vessels

N-119-6 Pump Internal Items, Section III, Division 1, Class 1, 2, and 3 3/14/94

N-121 Carbon Steel Pipe Flanges Larger than 24 in., 3/1/79

(1744) Section III, Division 1, Class 2 and 3 Construction

N-123 Leak Testing of Seal Welds, Section III, Division 1, Class 1, 2, and 3 3/1/79
(1746) Construction

N-124 Requirements for Martensitic Stainless Forgings with 13% 7/13/87

(1747) Chromium and 4% Nickel, Section III, Division 1

N-125 Low Carbon Austenitic Stainless Steel Pipe Welded With Filler 7/1/78
(1748) Metal, Section III, Division 1, Construction

N-126 Hard Surfacing by the Spray-Fuse Method, Section III, 7/1/88

(1754) Class 1, 2, and 3 Construction

N-127 Alternative Rules for Examination of Welds in Piping, Section III, 2/20/92
(1755-1) Class 1 and 2 Construction

RG 1.84, Rev. 33, Page 15

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-139 Testing of Electroslag Wire and Flux for Class 1, 2, 3, MC, and CS 1/1/79
Construction, Section III, Division 1

N-140 Use of SA-453 Bolts in Service Below 800EF Without Stress Rupture 12/31/85
(1772) Tests, Section III, Division 1

N-142-1 Minimum Wall Thickness for Class 2 and 3 Valves, Section III, 1/1/80
(1774-1) Division 1

N-147 Use of Modified SA-487 Grade CA6NM, Section III, Division 1, 7/1/78
(1781) Class 1, 2, 3, MC or CS

N-148 Use of Copper-Nickel Alloy 962 for Castings, Section III, Division 1, 6/30/83
(1782) Class 3 Construction

N-156 Structural Steel Rolled Shapes, Section III, Division I, Class 2, 3, 2/14/86
(1793) and MC

N-157 Use of Seamless Al-Br, Alloy CDA 614 Pipe, Section III, Division 1, 1/7/83
(1794) Class 3

N-158 Examination of Weld Repairs in Forgings, Section III, Division 1, 7/1/78

(1795) Class 1, 2, 3, MC and CS

N-159 Body Neck Thickness Determination for Valves with Inlet 7/1/78
(1796) Connections 4-Inch Nominal Pipe Size and Smaller, Section III,
Division 1, Class 1, 2, and 3

N-174 Size of Fillet Welds for Socket Welding of Piping, Section III, 1/1/81
(1812) Division 1

N-176-1 Use of Type XM-19 for Construction, Section III, Division 1, Class 1, 8/25/83
(1819-1) 2, and 3

N-177 Alternative Ultrasonic Examination Technique, Section III, 1/1/84

(1820) Division 1

N-178 Use of ASTM B271, CDA 954, Alloy 9C for Class 3 Construction, 1/1/80
Section III, Division 1

N-179 Openings in Valves for Section III, Division 1, Class 1, 2 and 3 7/11/80
Construction

N-180 Examination of Springs for Class 1 Component Standards Supports, 7/1/78

Section III, Division 1

N-181 Steel Castings Refined by the Argon Decarburization Process, 7/11/80

Section III, Division 1, Construction

N-182 Alternate Rules for Procedure Qualification Base Material 7/1/81

Orientation, Section III, Division 1, Class 2 and 3 Construction

N-183 Use of Modified SA-182 Grade F22 for Section III, Division 1, 1/1/80
Class 1, 2 and 3 Construction

RG 1.84, Rev. 33, Page 16

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-184 Roll Threading of SA-453 Bolting for Section III, Division 1, 7/1/79
Class 1, 2, 3 or CS Construction

N-188-1 Use of Welded Ni-Fe-Cr-Mo-Cu (Alloy 825) and Ni-Cr-Mo-Cb (Alloy 8/14/96
625) Tubing, Section III, Division 1, Class 2 and 3

N-189 Primary Membrane Plus Primary Bending Stress Intensity Limits for 7/1/79
Other Than Solid Rectangular Sections for Section III, Division 1,
Class MC Construction

N-190 Use of SA-455 for Class 3 Components, Section III, Division 1 7/1/78

N-193 Use of SB-61 and SB-62 Bronze for Section III, Division 1, Class 3 11/21/80
Flange and Socket Weld End Valves

N-196-1 Exemption from the Shakedown Requirements When Plastic Analysis 7/1/92
Is Performed for Section III, Division 1, Class 1 and CS Construction

N-204 Use of Modified SA-508, Class 3, and SA-541, Class 3 for Section III, 1/1/81
Division 1, Class 1, 2, and 3 Components

N-206 Use of ASTM B151-75 Copper-Nickel Alloy 706 Rod and Bar for 6/30/83
Section III, Division 1, Class 3 Construction

N-207-1 Use of Modified SA-479 Type XM-19 for Section III, Division 1, 1/21/85
Class 1, 2, 3, or CS Construction

N-208-2 Fatigue Analysis for Precipitation Hardening Nickel Alloy Bolting 5/7/02
Material to Specification SA-637 N07718 for Class 1 Construction,
Section III, Division 1

N-212 Welding Procedure Qualification of Dissimilar Metal Welds When 1/1/81

(1693) “Buttering” with Alloy Weld Metal and Heat Treatment May Be
Involved, Section III, Division 1, and Section IX.

N-214-2 Use of SA-351 Grade CN7M, for Valves, Section III, Division 1 12/31/83

N-215 Integrally Finned Titanium Tubes, Section III, Division 1, Class 3 5/15/81
Construction

N-217-1 Postweld Heat Treatment of Weld Deposit Cladding on Classes 1, 2, 2/23/87

3, MC, and CS Items, Section III, Division 1

N-220 Code Effective Date for Component Supports, Section III, Division 1 7/13/81

N-223 Requirements for Stainless Steel Precipitation Hardening, Section III, 11/20/81
Division 1, Class MC

N-224-1 Use of ASTM A500 Grade B and ASTM A501 Structural Tubing 4/5/90
for Welded Attachments for Section III, Class 2, 3, and MC

N-225 Certification and Identification of Material for Component Supports, 1/1/81

Section III, Division 1

N-226 Temporary Attachment of Thermocouples, Section III, Division 1, 1/1/80

Class 1, 2 and 3 Component Supports

RG 1.84, Rev. 33, Page 17

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-227 Examination of Repair Welds, Section III, Class 2 and 3 Tanks 7/9/82

N-228 Alternate Rules for Sequence of Completion of Code Data Report 3/19/82
Forms and Stamping for Section III, Class 1, 2, 3 and MC
Construction

N-229 Alternate Rules for Fabrication Welding SB-148 Alloy CDA 954 1/21/88
for Section III, Division 1, Class 3 Construction

N-231 Alternate Methods for Leak Detection in the Attachment Welds of 7/1/92
Leak Chase Channels, Section III, Division 2, Class CC

N-233 Alternate Rules for PWHT of P-No. 6, Group 4 Material for 9/17/87
Section III, Division 1, Class 3 Construction

N-237-2 Hydrostatic Testing of Internal Piping, Section III, Division 1, 7/1/88

Classes 2 and 3

N-240 Hydrostatic Testing of Open-Ended Piping, Section III, Division 1 7/1/97

N-241 Hydrostatic Testing of Piping, Section III, Division 1 7/1/97

N-245 Use of ASTM B61-76 and B62-76 Copper Alloy Castings 7/17/85
for Section III, Division 1, Class 3 Construction

N-246-2 SB-169 Alloy C61400, Section III, Division 1, Class 3 Construction 7/27/95

N-247 Certified Design Report Summary for Component Standard Supports, 4/30/93
Section III, Division 1, Class 1, 2, 3 and MC

N-248 Alternative Reference Radiographs, Section III, Division 1, Classes 1, 7/1/80

2, 3, MC, and CS Construction

N-259 Ni-Cu-Al Bolting Material SB 164 Modified, Section III, Division 1, 1/1/84
Class 3

N-261 Weld Procedure Qualification for Materials with Impact 12/13/82

Requirements for Section III, Division 1, Class 3 Construction

N-262 Electric Resistance Spot Welding for Structural Use in Component 7/27/91
Supports, Section III, Division 1

N-265-1 Modified SA-487 Castings, Section III, Division 1, Class 1 8/14/97

N-267 Double-Wall Radiography, Section III, Division 1, Class 1 and 2 7/1/81

N-271 Simplified Method for Analyzing Flat Face Flanges with Metal to 2/14/86
Metal Contact Outside the Bolt Circle for Section III, Class 2, 3,
and MC Construction

N-272 Compiling Data Report Forms, Section III, Division 1 1/1/82

N-276 Welding of SA-358 Pipe, Section III, Division 1 2/14/86

N-277 Use of Type XM-19 Austenitic Stainless Steel for Section III, 9/17/80
Division 1, Class MC Construction

RG 1.84, Rev. 33, Page 18

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-280 Alternate Rules for Examination of Welds in Section III, Class 3 7/1/81
Storage Tanks

N-281 Welding Operator Performance Qualification, Section III, Division 1 7/1/81

N-282 Nameplates for Valves, Section III, Division 1, Class 1, 2, and 3 7/30/89
Construction

N-294 SB-148 Alloys 952 and 954, and SB-62 Alloy 836 Fittings, 7/27/95
Section III, Division 1, Class 2

N-295 NCA-1140, Materials, Section III, Division 1 6/30/82

N-296 Welding Material, Section III, Division 1 Construction 12/1/83

N-298 Examination of Component Supports, Section III, Division 1, Class 1, 12/1/83

2, 3, and MC

N-299-1 Use of Nickel-Chromium-Molybdenum-Columbium Alloy 625 2/23/87

Forgings, Section III, Division 1, Class 2 and Class 3 Components

N-300 Pressure-Temperature Ratings, Hydrostatic Tests, and Minimum 12/1/83

Wall Thickness of Valves, Section III, Division 1, Class 1

N-302 Tack Welding, Section III, Division 1, Construction 11/28/83

N-304-4 Use of 20Cr-25Ni-6Mo (Alloy UNS N08366) Plate, Sheet, Strip, 1/1/03
and Welded Pipe, Class 2 and 3, Section III, Division 1

N-309-1 Identification of Materials for Component Supports, Section III, 7/1/95

Division 1

N-313 Alternative Rules for Half-Coupling Branch Connections, Section III, 7/1/96
Division 1, Class 2

N-316 Alternative Rules for Fillet Weld Dimensions for Socket Welding 8/14/93
Fittings, Section III, Division 1, Class 1, 2, and 3

N-317 ASTM A276 Bar, Section III, Division 7/1/82

N-320 Alternate PWHT for SA-487, Grade CA6NM, Section III, Division 1 12/31/83

N-321-1 Use of Modified SA-249, Grade TP 304, Section III, Division 1, 12/5/88
Class 1

N-324 Qualification of Authorized Nuclear Inspector Supervisor (Concrete) 7/27/95

and Authorized Nuclear Inspector (Concrete), Section III, Division 2,
Classes CB and CC

N-328 Thermit Brazing or Welding of Nonstructural Attachments, 9/17/87

Section III, Division 1

N-336 Examination of Welds Inaccessible During Pressure Test, Section III, 6/30/83
Division 1, Class MC

RG 1.84, Rev. 33, Page 19

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-337-1 Use of ASTM B 525-70 Grade II, Type II, Sintered Austenitic 3/14/94
Stainless Steel for Classes 2, 3, and MC Component Standard
Supports, Section III, Division 1

N-339 Examination of Ends of Fillet Welds, Section III, Division 1, 9/17/84

Classes 1, 2, and MC

N-341 Certification of Level III NDE Examiner, Section III, Division 1 and 2 7/1/88

N-342 Use of SA-249 and SA-312 Type 317 Stainless Steel, Section III, 4/2/85
Division 1, Classes 1, 2, and 3

N-345-1 Attachment of AMS 5382 Alloy 31 Seat Rings by Friction Welding, 3/28/01
Section III, Division 1, Classes 1, 2, and 3

N-346 Explosive Welding, Section III, Division 1 6/30/86

N-347 Continuous Electric Resistance Seam Welding of P-No. 8 Materials 12/13/85

for Component Supports, Section III, Division 1

N-349 Pressure Testing Piping Systems, Section III, Division 1, 12/31/85

Classes 2 and 3

N-352-1 Use of SA-638 Grade 660 Forgings and Bars Below 700EF Without 6/30/86
Stress Rupture Tests, Section III, Division 1

N-353 Marking of SA-354 Grade BD Bolting, Section III, Division 1 9/5/88

N-354-1 Subcontracted Service, Section III, Division 2 8/14/94

N-355 Calibration Block for Angle Beam Ultrasonic Examination of Large 8/9/96
Fittings in Accordance with Appendix III-3410

N-357 Certification of Material for Component Supports, Section III, 7/1/88

Division 1, Subsection NF

N-359 Weld Connection for Coaxial Cylinders, Section III, Division 1, 12/31/84
Class 1

N-362-2 Pressure Testing of Containment Items, Section III, Division 1, 7/1/88

Classes 1, 2, and MC

N-367 SA-372 Type V, Grade 1, Class B, Section III, Division 1 2/19/89

N-368 Pressure Testing of Pump Discharge Piping, Section III, Division 1, 7/1/95
Classes 2 and 3

N-370-2 Modified SA-705 Type XM-13 Forgings, Section III, Division 1 8/14/97

N-371-1 12Cr-1W-1Mo-1/4V Martensitic Stainless Steel Valve Internals, 7/18/88

Section III, Division 1

N-372 SB-163 Ni-Fe-Cr-Mo-Cu Alloy 825 (UNS N08825) Tubing, 12/31/83

Section III, Division 1

N-376 Pressure Testing of Embedded Class 2 and 3 Piping, Section III, 7/30/86
Division 1

RG 1.84, Rev. 33, Page 20

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-377 Effective Throat Thickness of Partial Penetration Groove Welds, 12/31/83

Section III, Division 1, Classes 1, 2, and 3

N-378 Examination of Piping Support Material, Section III, Division 1, 10/28/86

Class 1

N-379-1 Bimetallic Tubing, Section III, Division 1, Class 1 7/18/91

N-384-1 Use of Prepackaged General Purpose Cement Grouts, Epoxy Grouts, 7/27/91
and Epoxy Bonding, Section III, Division 2, Class CC

N-387 Certification of Level III NDE Examiner, Section III, Division 2 9/18/01

N-388 Component Support Bolting, Section III, Division 1, Classes 2, 3, 2/23/87

and MC

N-393 Repair Welding Structural Steel Bolted Shapes and Plates for 7/27/95
Component Supports, Section III, Division 1

N-394 Restricting Lift to Achieve Reduced Relieving Capacities of Full Lift, 3/2/01
Nozzle Type, and Flat Seated Safety and Safety Relief Valves for
Compressible Fluid Applications, Section III, Division 1,
Classes 2 and 3

N-395 Laser Welding, Section III, Division 1 9/18/01

N-403 Reassembly of Subsection NF Component and Piping Supports, 7/1/95

Section III, Division 1

N-410 Certified Relieving Capacities of Pressure Relief Valves Having 3/14/00

Set Pressure of 3 psig up to but Not including 15 psig Installed for
Overpressure Protection of Compressible Fluid Systems, Section III,
Division 1, Classes 2 and 3

N-412 Alternative Rules for Witnessing the Piping System Pressure Tests 4/15/91
of Classes 1, 2, and 3 Piping Systems, Section III, Division 1

N-413 Minimum Size of Fillet Welds for Subsection NF Linear Type 2/14/88
Supports, Section III, Division 1

N-414 Tack Welds for Class 1, 2, 3 and MC Components and Piping 2/20/92
Supports, Section III, Division 1

N-418-1 Use of Seamless Ni-Fe-Cr-Mo-Cu Low Carbon (UNS N08028 7/27/95

and UNS N08904) Tubing, Section III, Division 1, Classes 2 and 3

N-420 Linear Energy Absorbing Supports for Subsection NF, Classes 1, 2, 1/1/99
and 3 Construction

N-421 Brazing Using a Radiant Energy Source, Section III, Division 1 6/30/86

N-433 Non-Threaded Fasteners for Section III, Division 1, Class 1, 2, and 3 12/16/95
Components and Piping Supports

N-438-4 UNS N08367 Material, Section III, Division 1, Class 2 and 3 7/1/98
Construction

RG 1.84, Rev. 33, Page 21

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-439-1 Use of 20Cr-18Ni-6Mo (Alloy UNS S31254) Forgings, Plate, 9/18/01

Seamless and Welded Pipe, and Welded Tube, Class 2 and 3
Construction, Section III, Division 1

N-440-1 Use of 20Cr-18Ni-6Mo (Alloy UNS J93254) Castings, Class 2 and 3 9/18/01
Construction, Section III, Division 1

N-441-2 Use of 20Cr-18Ni-6Mo (Alloy UNS S31254) Fittings, Class 2 and 3 9/18/01
Construction, Section III, Division 1

N-442 1977 Addendum to ANSI/ASME PTC 25.3-1976, Safety and Safety 3/8/92
Relief Valves, Class 1, 2, 3, and MC, Section III, Division 1

N-443-2 High Yield Strength Cr-Mo Steel, Class 1 Components, Section III, 1/1/01
Division 1

N-451 Alternative Rules for Analysis of Piping Under Seismic Loading, 8/14/96
Class 1, Section III, Division 1

N-459 SA-508 Basic Oxygen-Ladle Furnace Process for Code Construction, 3/14/94
Section III, Division 1

N-462 Alternative Rules for Analysis of Piping Products Under Seismic 5/24/96
Loading, Class 2 and 3 Piping Systems, Section III, Division 1

N-466-1 Modified 9Cr-1Mo Material, Section III, Division 1, Classes 1, 2, 8/14/97

and 3

N-468 Alternative Method of Earthquake Description for Class 2 and 3 11/92

Piping of Low Seismicity Sites, Section III, Division 1

N-470 Class MC Material Requirements [NE-2121(c)], Section III, 3/8/92

Division 1

N-474-2 Design Stress Intensities and Yield Strength Values for UNS N06690 1/1/00
With a Minimum Specified Yield Strength of 35 ksi, Class 1
Components, Section III, Division 1

N-475 Materials in Inventory, Section III, Division 1 12/11/92

N-476 Class 1, 2, 3, and MC Linear Component Supports - Design Criteria 7/1/96

for Single Angle Members, Section III, Division 1, Subsection NF

N-482 Direct Quenched Stainless Bar, ASTM A 479-88b, Section III, 3/5/93
Division 1

N-484-1 Real Time Radioscopic Examination of Welds, Section III, Division 1 12/16/94

N-492-1 Grade 9 Titanium Alloy Tubing, Section III, Division 1, Class 1, 2, 1/1/00
and 3

N-497-1 Use of Fe-Ni-Cr-Mo-N (C-N-3MN) Cast Materials, 1/1/99

Section III, Division 1, Class 2 and 3 Construction

N-501 Alternative Rules for NCA-3800, 1990 Addenda, Section III, 12/31/93
Division 1

RG 1.84, Rev. 33, Page 22

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

N-502 SA-268, Grade 26-3-3 (UNS S44660), Section III, Classes 2 and 3 1/1/00

N-507 Identification of Welders, Section III, Division 2 7/27/95

N-540 Guidance on Implementation of NCA-3800 Revisions in 1994 6/30/98

Addenda, Section III, Division 1

N-549 Stamping and Flow Certification of Rupture Disk Devices, Classes 2 3/19/99
and 3, Section III, Division 1

N-550 Alternative Rules for Examination of Welds in Instrument Tubing, 5/20/01

Classes 1 and 2, Section III, Division 1

N-551 Alternative Methods of Analysis, NC/ND-3673.1, Class 2 and 3 8/14/97

Applications, Section III, Division 1

N-559 SA-203, Grade E (Plate) and SA-350, Grade LF3 (Forging), 3.5% Ni 5/24/99
Nominal Composition Used in Class 1 Construction, Section III,
Division 1

N-608 Applicable Code Edition and Addenda, NCA-1140(a)(2), Section III, 5/20/01
Division 1

N-644 Weld Procedure Qualification for Procedures Exempt From PWHT 9/18/01
in Class 1, 2, and 3 Construction, Section III, Division 1

1141-7 Foreign Produced Steel 7/23/76

1434-1 Postweld Heat Treatment of SA-487 Class 8N Steel Castings, 1/1/78

Section III

1461-1 Electron Beam Welding, Section I, III, and VIII, Division 1 and 2 2/16/77

1470-2 External Pressure Charts for High-Strength Carbon Steels 11/4/74

and for Low-Alloy Steels, Section VIII, Division 1 and 2, and
Section III

1471-1 Vacuum Electron Beam Welding of Tube Sheet Joints, Section III 1/1/78

1475-1 Ferritic-Austenitic Stainless Steel Seamless Tubes for Section III, 7/1/75
Class 2 and 3 Construction

1477-1 Use of 1970 Addenda of ANSI B31.7, Section III 1/1/78

1494-1 Weld Procedure Qualification Test, Section III 1/1/78

1506 Stress Intensification Factors, Section III, Class 2 and 3 Piping 1/1/78

1515 Ultrasonic Examination of Ring Forgings for Shell Sections, 7/1/77

Section III, Class 1 Vessels

1529 Materials for Instrument Line Fittings, Section III 7/1/73

1531 Electrical Penetrations, Special Alloys for Electrical Penetration 3/21/77

Seals, Section III

RG 1.84, Rev. 33, Page 23

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

1532 Section III, Class 3 Components Made of 8 Percent and 9 Percent 1/1/78
Nickel Steel

1533 Pressure Temperature Ratings of SA-351 Grades CF8A, CF3, 7/1/75

and CF3M, Section III

1535-2 Hydrostatic Testing of Section III, Class 1 Valves 3/21/77

1536 Closing Seam for Electrical Penetrations for Section III, Class 2, 3, 7/1/77
and MC

1553-1 Upset Heading and Roll Threading of SA-453 for Bolting 1/1/76
in Section III

1555-1 Certification of Safety Relief Valves, Section III, Division 1 1/1/78

1567 Testing Lots of Carbon and Low Alloy Steel-Covered Electrodes, 1/1/78
Section III

1568 Testing Lots of Flux Cored and Fabricated Carbon and Low Alloy 1/1/78
Steel Welded Electrodes, Section III

1573 Vacuum Relief Valves, Section III 1/1/78

1574 Hydrostatic Test Pressure for Safety Relief Valves, Section III 12/31/74

1580-1 Buttwelded Alignment Tolerance and Acceptable Slopes for 1/1/78

Concentric Centerlines for Section III, Class 1, 2, and 3 Construction

1581 Power-Operated Pressure Relief Valves, Section III 3/1/79

1583 Use of 80-40 Carbon Steel Castings, Section III 3/21/77

1587 SA-508 Class 3 Forgings with 0.4/1.0 Ni for Section III and VIII, 12/31/75
Division 2 Construction

1590 Chemical Analysis Variations, Section III Construction 3/21/77

1601 Limits of Reinforcement for Two-Thirds Area, Section III, Class 1 7/1/74

1602-1 Use of SB-42 Alloy 122, SB-111 Alloys 122, 715 and 706 and SB-466 12/31/74
Alloys 706 and 715, Section III, Class 2 and 3 Components

1603 Toughness Tests When Cross-Section Limits Orientation and 7/1/74

Location of Specimens

1605 Cr-Ni-Mo-V Bolting Material for Section III, Class 1 Components 3/17/80

1608-1 Use of ASME SB-265, SB-337, SB-338, and SB-381, Grades 1, 2, 3, 3/21/77
and 7 Unalloyed Titanium and ASTM B-363 Titanium Welding
Fittings, Section III, Class 2 and 3 Components

1613 Use of SA-372 Class IV Forgings, Section III Construction 1/1/78

1614 Hydrostatic Testing of Piping Prior to or Following the Installation 1/1/79

of Spray Nozzles for Section III, Classes 1, 2, and 3 Piping Systems

RG 1.84, Rev. 33, Page 24

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

1615 Use of A587-73, Section III, Class 3 Construction 1/1/78

1616 Ultrasonic Examination of Seamless Austenitic Steel Pipe, Section III, 7/1/75
Class 1 Construction

1622 PWHT of Repair Welds in Carbon Steel Castings, Section III, 1/1/76
Class 1, 2, and 3

1623 Design by Analysis for Section III, Class 1 Sleeve-Coupled 3/1/79

and Other Patented Piping Joints

1625 Repair of Section III Class 2 and 3 Tanks 12/31/74

1633 Brazing of Seats to Class 1, 2, and 3 Valve Body or Bonnets, 1/1/78

Section III

1637 Effective Date for Compliance with NA-3700 of Section III 1/1/75

1645 Use of DeLong Diagram for Calculating the Delta Ferrite Content 1/1/76
of Welds in Section III, Class 1, 2, and CS Construction

1648 SA-537 Plates for Section III, Class 1, 2, 3, and MC Components 7/1/76

1649 Modified SA-453-GR 660 for Class 1, 2, 3, and CS Construction 1/1/76

1650 Use of SA-414 Grade C for Class 2 and 3 Components, Section III, 12/31/74
Division 1

1651 Interim Requirements for Certification of Component Supports, 3/1/79

Section III, Subsection NF

1657 Stress Criteria for Class 2 and 3 Atmospheric and Low-Pressure 7/1/77
(0-15 psig) Steel Storage Tanks

1659 Interconnection of Two Piping Systems for Section III, Class 1, 2, 7/1/77
and 3 Construction

1661 Postweld Heat Treatment P-No.1 Materials for Section III, Class 1 1/1/78
Vessels

1662 Shop Assembly of Components, Appurtenances and Piping 1/1/78

Subassemblies for Section III, Class 1, 2, 3, and MC Construction

1664 Use of Cr-Ni-Fe-Mo-Cu-Cb Stabilized Alloy Cb-3 for Section III 3/21/77
Class 2 and 3 Construction

1666 Use of SB-12, Alloy 122 for Class 2 and 3 Construction 7/1/75

1672 Nuclear Valves for Section III, Division 1, Class 1, 2, 3 Construction 3/21/77

1675 Tubesheet to Shell or Formed Head Weld Joints, Section III, Class 1 7/1/76
Vessels

1676 Clarification of Stress Intensities in Curved Pipe or Welded Elbows, 7/1/76

Section III

RG 1.84, Rev. 33, Page 25

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

1678 Butterfly Valves of Circular Cross Section Larger than 24 in. NPS 1/1/80
for Section III, Class 2 and 3 Construction

1682-1 Alternate Rules for Material Manufacturers and Suppliers, 12/31/75

Section III, Subarticle NA-3700

1683-1 Bolt Holes for Section III, Class 1, 2, 3 and MC Component Supports 7/1/76

1684 A637 Grade 718 for Bolting Class 1 and 2 Construction 1/1/76

1685 Furnace Brazing Section III, Class 1, 2, 3 and MC Construction 1/1/78

1686 Furnace Brazing, Section III, Subsection NF, Component Supports 1/1/78

1690 Stock Materials for Section III Construction, Section III, Division 1 1/1/77

1691 Ultrasonic Examination in Lieu of Radiography of Repair Welds 1/1/78

for Vessels, Section III, Class 1

1703 Brazing of Copper Alloys, Section III, Class 2 1/1/78

1706 Data Report Forms for Component Supports, Section III, 12/31/75
Class 1, 2 and 3

1713 Small Material Items, Section III, Division 1, Class 1, 2, 3, CS and 12/31/75
MC

1718 Design of Structural Connections for Linear Type Component 7/1/76

Supports, Section III, Division 1, Class 1, 2 and 3 and MC

1719 Single-Welded, Full-Penetration Sidewall Butt Joints in Atmospheric 7/1/76

Storage Tanks, Section III, Division 1, Class 2

1728 Steel Structural Shapes and Small Material Products for Components 7/1/77
Supports, Section II, Division 1 Construction

1740 Weld Metal Test, Section III, Class 1, 2, 3, MC and CS 7/1/76

1741-1 Interim Rules for the Required Number of Impact Tests for Rolled 1/1/78
Shapes, Section III, Division 1, Subsection NF, Components Supports

1742 Use of SB-75 Annealed Copper Alloy 122, Section III, Division 1, 7/1/76
Class 2 Construction

1743 Use of SB-98 Cu-SiB Rod CDA651 Section III, Division 1, Class 2 7/1/76
Components

1760 Maximum Dimensions for Isolated Pores in Welds 7/1/77

Class 1 Components, Section III, Division 1

1765 Machining After Hydrostatic Testing Class 2 and 3 Construction, 7/1/77

Section III, Division 1

1766 Testing Requirements for Welding Materials, Class 1, 2, 3, 7/1/77

MC and CS Construction, Section III, Division 1

RG 1.84, Rev. 33, Page 26

 Code Case Table 3. Annulment Date
Number Annulled Unconditionally Approved Code Cases

1767 Examination of Tubular Products Without Filler Metal-Class 1 1/1/77

Construction, Section III, Division 1

1768 Permanent Attachments to Containment Vessel–Class MC, 1/1/78

Section III, Division 1

1769-1 Qualification of NDE Level III Personnel, Section III, Division 1 10/1/77

1773 Use of Other Product Forms of Materials for Valves, Section III, 7/1/77
Division 1

1775 Data Report Forms for Core Support Structures, Class CS, 8/13/79
Section III, Division 1

1777 Use of SA-106, Grade C in Class MC Construction, Section III, 7/1/77

Division 1

1787 Depth of Weld Repairs for Forgings, Section III, Division 1, Class 1, 1/1/78
2, 3, MC and CS Construction

1798 Use of ASTM A352-75, Grades LCA and LCC, Section III, 1/1/78
Division 1, Class 1, 2, and 3

1808 F-Number Classification of Low Alloy and Carbon Steel Bare Rod 1/1/78
Electrodes, Sections I, II, III, IV, V, VIII, and IX.

1810 Testing Lots of Carbon Steel Solid, Bare Welding Electrode or Wire, 3/3/80
Section III, Division 1, Class 1, 2, 3, MC, and CS

1819 Use of Type XM-19 for Construction, Section III, Division 1, 1/1/78
Class 1, 2, 3

RG 1.84, Rev. 33, Page 27

4. Annulled Conditionally Acceptable Section III Code Cases

The Code Cases listed in Table 4 were conditionally approved by the NRC but were subsequently
annulled by the ASME.

Table 4. Annulled Conditionally Acceptable Section III Code Cases

Code Case Table 4. Annulment Date

Number Annulled Conditionally Acceptable Code Cases

Title/Condition

N-11-5 High Yield Strength Cr-Mo Steel for Section III, Division 1, 8/29/80
(1414-5) Class 1 Vessels

The information required to be developed by Note 1 in the Code Case

should be provided in each referencing Safety Analysis Report.

N-31-1 Elastomer Diaphragm Valves, Section III, Division 1, Classes 2 and 3 7/1/93

Each applicant who applies the Code Case should indicate in the
referencing Safety Analysis Report that the service life of the
elastomer diaphragm should not exceed the manufacturer’s
recommended service life. This recommended service life should
not exceed 1/3 of the minimum cycle life as established by the
requirements of paragraph 3 of the Code Case. In addition, the
service life of the elastomer diaphragm should not exceed 5 years,
and the combined service and storage life of the elastomer
diaphragm should not exceed 10 years.

N-32-4 Hydrostatic Testing of Embedded Class 2 and Class 3 Piping 3/16/84

for Section III, Division 1 Construction

The acceptance of Code Case N-32-4 was based on the following

clarification and interpretation. Code Case N-32-4 does not replace
paragraph NC/ND-6129, “Provisions for Embedded or Inaccessible
Welded Joints in Piping,” of the Code. The intent of the Code Case
is to (1) provide additional testing above Code requirements
and (2) permit liquid penetrant or magnetic particle testing in place
of radiographic testing for Class 3 piping with 3/8" nominal wall
thickness or less.

Paragraph (1) contains an additional requirement to the Code.

It was, therefore, acceptable but unnecessary to include in the
Code Case. Paragraph (2) is a variation in the volumetric
examination technique and was acceptable as written. Paragraph (3)
contains an additional requirement and is not a relaxation of the
Code. It was, therefore, acceptable but unnecessary to include in the
Code Case.

RG 1.84, Rev. 33, Page 28

 Code Case Table 4. Annulment Date
Number Annulled Conditionally Acceptable Code Cases

Title/Condition

N-92 Waiver of Ultrasonic Transfer Method, Section III, V, and VIII, 7/13/81
(1698) Division 1

The material from which the basic calibration block is fabricated

should be of the same product form, alloy, and heat treatment as the
material being examined. Alloys of equivalent P-number grouping
may be used for the fabrication of calibration blocks if adjustments
to signal height can be made to compensate for sound beam
attenuation difference between the calibration block and the material
under examination by following the transfer method procedure of
T-535.1(d), Article 5, Section V, ASME B&PV Code, 1977 Edition.

N-100 Pressure Relief Valve Design Rules, Section III, Division 1, 1/1/83
(1711) Class 1, 2 and 3

The following information should be provided in the Safety Analysis

Report:
(1) If stress limits are used in excess of those specified for the
upset operating condition, it should be demonstrated how the
pressure relief function is ensured. Refer to paragraph 3.1,
Section I, of the Code Case for Class and paragraph 3.2,
Section II, of the Code Case for Class 2 and 3 pressure relief
valves.
(2) If Code Case 1660 is to be used in conjunction with the
Code Case, it should be stated that the stress limits of
Code Case 1660 supersede those of paragraph 3.2(b),
Section I, of Code Case 1711. Functional assurance of (1)
above is required in all situations.

N-106-2 Weld End Preparation for Section III, Division 1 Construction 8/14/93
(1720-2)
The acceptance of weld end preparations other than those shown in
Figures 1, 2, and 3 of the Code Case should be evaluated on a case-
by-case basis.

N-110 Alternate Test Fluids, Section III, Division 1 1/1/79

(1727)
The applicant should provide justification in the referencing Safety
Analysis Report for the fluid selected for use in the pressure test.
The information provided should demonstrate that the fluid selected
will not have deleterious effects on the material of the pressure
boundary and that the fluid may be safely used at the specified
temperature and pressure of the test. When the fluid selected for use
is the operating fluid, additional information is not required.

RG 1.84, Rev. 33, Page 29

 Code Case Table 4. Annulment Date
Number Annulled Conditionally Acceptable Code Cases

Title/Condition

N-116 Weld Design for Use for Section III, Division 1, Class 1, 2, 3 and 1/1/78
(1734) MC Construction of Component Supports

If the configuration of Figure 1 of the Code Case is used for Class 1

and MC components supports, full penetration welds should be
used. The application of the configuration shown in Figures 2 and 3
should be restricted to the welding of cans for spring encapsulation
in spring hangers. In Figure 3, the length of the leg of the fillet weld
adjacent to the plate should be equal to the thickness of the exposed
edge of the plate; also, the leg of the fillet weld adjacent to the shell
should be equal to the thickness of the exposed end of the shell.

N-146-1 Hydrostatic Testing and Stamping of Components, Section III, 1/1/82

(1780-1) Division 1, Construction

On a generic basis, the application of the Code Case is limited to

pumps and valves. Application to other components should be
treated on a case-by-case basis. Each licensing application in which
the Code Case is to be used should contain information showing
that, as a minimum the closure fixture will impose loads that result
in stresses equal to or greater than those induced during the
hydrostatic test of a complete pump assembly. A closure fixture for
the part being tested that is similar in size and shape to the actual
mating part is considered adequate to impose these loads. It is not
intended that piping reaction loadings be simulated in the hydrostatic
testing.

N-175 Welded Joints in Component Standard Supports, Section III, 7/1/79

(1818) Division 1

That portion of the unwelded housing that is limited to 90E

maximum should include a minimum of two sectors that are uniform
in length.

N-199 Intervening Elements, Section III, Division 1, Classes 1, 2, 3 and 1/1/81

MC Component Construction

The applicants should provide information in the referencing Safety

Analysis Report that demonstrates that all intervening elements have
been designed in compliance with the requirements of the respective
design specification.

N-238 High Temperature Furnace Brazing of Seat Rings in Valve Bodies 1/1/82
or Bonnets for Section III, Division 1, Class 1, 2, and 3 Valves

The furnace brazing process procedure qualification should include

a verification for nonsensitization as given in ASTM A 262-70,
Practices A or E, or ASTM A 708-74 whenever materials subject to
sensitization are to be brazed. Documentation is required that a
nonsensitizing brazing procedure was employed for valves produced
to this Case.

RG 1.84, Rev. 33, Page 30

 Code Case Table 4. Annulment Date
Number Annulled Conditionally Acceptable Code Cases

Title/Condition

N-242-1 Materials Certification, Section III, Division 1, Classes 1, 2, 3, MC, 6/30/84

and CS Construction

Applicants should identify in their Safety Analysis Reports the

components and supports for which the Code Case is being applied
and should specify the respective paragraphs of the Code Case.

N-252 Low Energy Capacitive Discharge Welding Method for Temporary 7/1/82
or Permanent Attachments to Components and Supports, Section III,
Division 1, and XI

The applicant should indicate in the Safety Analysis Report the

application, the material, and the material thickness to which the
strain gage or thermocouple will be attached by CD welding.

N-260-2 Weld Repair of SA-182 Type 316 Forgings, Section III, Division 1, 12/5/88
Classes 1, 2, 3, and MC

Type 308L welding materials should not be used to repair grade F

316 N forgings because of the difference in strength levels.

N-263 Alternate Thread Forms, Series and Fits for Component Supports, 3/17/83
Section III, Division 1

The following information should be provided in the Safety Analysis

Report: (1) a description of the application, (2) a need for the use of
the Code Case, and (3) a demonstration that support design will
withstand maximum conditions of loading with the worst
combination of thread tolerance.

N-274 Alternative Rules for Examination of Weld Repairs for Section III, 6/30/86
Division 1 Construction

The ultrasonic examination procedures shall be proven by actual

demonstration, to the satisfaction of the Authorized Nuclear
Inspector, that the procedures are capable of detecting unacceptable
cracks according to Section XI requirements.

N-275 Repair of Welds, Section III, Division 1 12/31/83

Use of the Code Case is applicable only when the removal of an

indication requires that the full weld thickness be removed and, in
addition, the backside of the weld assembly joint is not accessible
for the removal of examination material. If an indication is removed
and weld-metal layers still remain, it is not acceptable to gouge
through the wall in order to qualify for use of the Code Case.
Instead, examination of the cavity is required when such an
indication has been removed.

RG 1.84, Rev. 33, Page 31

 Code Case Table 4. Annulment Date
Number Annulled Conditionally Acceptable Code Cases

Title/Condition

N-279 Use of Torquing as a Locking Device for Section III, Division 1, 7/13/81
Class 1, 2, 3, and MC Component Supports

When torquing or other preloading is used as a locking device and

the joint is later unloaded or disassembled, the bolting should be
replaced unless it can be demonstrated or proved to the Authorized
Nuclear Inspector that the original bolting has not been permanently
strained.

N-310-1 Certification of Bolting Materials, Section III, Division 1, 7/1/82

Class 1, 2, 3, MC and CS

Each applicant who applies the Code Case should indicate in the
referencing Safety Analysis Report (1) in what way the bolting does
not meet NCA-3800 (or NA-3700), (2) where the bolting will be
used in the plant, and (3) how it will be shown that the bolting
material properties required by the Equipment Support Design
Specification are present in the actual bolting material.

N-314 Alternate Rules for Thread Engagement, Section III, Division 1 5/11/84

Applicants should identify in their Safety Analysis Report (1) the

minimum length of thread engagement and (2) the procedure used to
establish thread engagement.

N-348 Use of SA-574 Socket Weld Head Cap Screws, Section III, 9/7/85
N-348-1 Division 1 2/20/89
N-348-2 8/14/93
Applicants should justify in their Safety Analysis Reports why use
of these socket head cap screws will not result in early failure from
stress corrosion cracking.

N-350 Postweld Heat Treatment–Thickness of Material, Section III, 9/5/85

Division 1

Applicants wishing to use this Code Case for other than P-1
materials should demonstrate that the use of this Code Case will not
adversely affect the required material properties.

N-383-1 Weld Repair of SA-182 Austenitic Forgings, Section III, Division 1, 9/5/85
Classes 1, 2, and 3

Applicants who apply the provisions of this Code Case to permit

material manufacturers to weld repair austenitic forgings without
resolution heat treatment should provide justification to the NRC
staff (via the Safety Analysis Report) why this is acceptable for their
applications, including their evaluation of the susceptibility for stress
corrosion cracking.

RG 1.84, Rev. 33, Page 32

 Code Case Table 4. Annulment Date
Number Annulled Conditionally Acceptable Code Cases

Title/Condition

N-397 Alternative Rules to the Spectral Broadening Procedures of 2/20/87

N-1226.3 for Classes 1, 2, and 3 Piping, Section III, Division 1

The Code Case is acceptable for specific plant applications on a

case-by-case basis pending revision of Regulatory Guide 1.122,
“Development of Floor Design Response Spectra for Seismic
Design of Floor-Supported Equipment or Components.”

N-398 Reporting of Charpy-V Notch Test Results, Section III, Division 1 2/20/87

The Code Case is not acceptable to steam generator or reactor

coolant pump supports. Applicants wishing to use this Code should
indicate in the Safety Analysis Report the component supports to
which the case is applied for review on a case-by-case basis.

N-404 Annealed Alloy UNS N06625 Over UNS N06600 Bimetallic Tubing, 12/11/95
Section III, Division 1, Class 1

The outside layer of the bimetallic tubing should be limited to a

minimum of 5 percent and to a maximum of 40 percent of the wall
thickness. The tolerance on the outside layer of material should not
exceed -0.000 to +0.007 inches of the specified design wall
thickness.

N-411-1 Alternative Damping Values for Response Spectra Analysis of 5/5/00

Class 1, 2, and 3 Piping, Section III, Division 1

(1) The Code Case damping should be used completely and

consistently, if used at all. (For equipment other than piping,
the damping values specified in Regulatory Guide 1.61,
“Damping Values for Seismic Design of Nuclear Power
Plants,” are to be used).
(2) The damping values specified may be used only in those
analyses in which current seismic spectra and procedures have
been employed. Such use is to be limited only to response
spectral analyses (similar to that used in the study supporting
its acceptance, NUREG/CR-3526). The acceptance of the use
with other types of dynamic analyses (e.g., time-history
analyses or independent support motion method) is pending
further justification.
(3) When used for reconciliation work or for support optimization
of existing designs, the effects of increased motion on existing
clearances and on-line mounted equipment should be checked.
(4) This Code Case is not appropriate for analyzing the dynamic
response of piping systems using supports designed to
dissipate energy by yielding (i.e., the design of which is
covered by Code Case N-420).
(5) This Code Case is not applicable to piping in which stress
corrosion cracking has occurred unless a case-specific
evaluation is made and is reviewed by the NRC staff.

RG 1.84, Rev. 33, Page 33

 Code Case Table 4. Annulment Date
Number Annulled Conditionally Acceptable Code Cases

Title/Condition

N-430 Alternative Requirements for Welding Workmanship and Visual 7/1/93

Acceptance Criteria for Class 1, 2, 3 and MC Linear-Type and
Standard Supports, Section III, Division 1

(1) The applicant should demonstrate that the applicable supports

are not subject to cyclic loading in excess of 20,000 cycles;
and
(2) The first sentence of 3.0(f)(1) should be replaced with the
following: “For material 3/8 in. and less nominal thickness,
undercut depth of 1/32 in. on one side of the member for the
full length of the weld, or 1/32 in. on one side for one-half the
length of the weld, and 1/16 in. for one-fourth of the length of
the weld on the face of a rectangular tube or one-fourth the
length of the weld on the same side of the member is
acceptable.”

1361-2 Socket Welds, Section III 3/1/79

Code Case 1361-2 was acceptable when used in connection with

Section III, paragraph NB-3356, Fillet Welds.

1412-4 Modified High Yield Strength Steel for Section III, Division 1, 1/1/77
Class 1 Vessels

The information required to be developed by Note 1 in the

Code Case should be provided in each referencing Safety Analysis
Report. The material given in the Inquiry section of the Code Case
should be SA-508, Class 4b, instead of SA-508, Class 4.

1423-2 Wrought Type 304 and 316 with Nitrogen Added, Sections I, III, 7/1/77
VIII, Division 1 and 2

Code Case 1423-2 was acceptable subject to compliance with the

recommendations contained in Regulatory Guides 1.31, “Control of
Ferrite Content in Stainless Steel Weld Metal,” and 1.44, “Control
of the Use of Sensitized Stainless Steel.”

1521-1 Use of H-Grades of SA-240, SA-479, SA-336, and SA-358, 1/1/78

Section III

Code Case 1521-1 was acceptable subject to compliance with the

recommendations contained in Regulatory Guides 1.31, “Control of
Ferrite Content in Stainless Steel Weld Metal,” and 1.44, “Control
of the Use of Sensitized Stainless Steel.”

1528-3 High Strength Steel SA-508, Class 2 and SA-541, Class 2 Forgings, 1/1/78
Section III, Class 1 Components

The information required to be developed by Note 1 in the Code Case

should be provided in each referencing Safety Analysis Report.

RG 1.84, Rev. 33, Page 34

 Code Case Table 4. Annulment Date
Number Annulled Conditionally Acceptable Code Cases

Title/Condition

1569 Design of Piping for Pressure Relief Valve Station, Section III 7/1/79

Code Case 1569 was acceptable subject to compliance with the

recommendations contained in Regulatory Guide 1.67, “Installation
of Overpressure Protection Devices.”

1606-1 Stress Criteria Section III, Classes 2 and 3 Piping Subject to Upset, 7/1/77
Emergency, and Faulted Operating Conditions

Code Case 1606-1 was acceptable subject to the interpretation that

the stress limit designations of “Upset,” “Emergency,” and “Faulted”
do not necessarily imply agreement with specified plant conditions
applicable to ASME Code Class 2 and 3 components for fluid
systems. These designations should be established and justified in
the design specifications.

1607-1 Stress Criteria for Section III, Classes 2 and 3 Vessels Designed to 7/1/77
NC/NC-3300 Excluding the NC-3200 Alternate

Code Case 1607-1 was acceptable subject to the interpretation that

the stress limit designations of “Upset,” “Emergency,” and “Faulted”
do not necessarily imply agreement with specified plant conditions
applicable to ASME Code Class 2 and 3 components for fluid
systems. These designations should be established and justified in
the design specifications.

1635-1 Stress Criteria for Section III, Class 2 and 3 Valves Subjected to 7/1/77
Upset, Emergency, and Faulted Operating Conditions

Code Case 1635-1 was acceptable subject to the interpretation that

the stress limit designations of “Upset,” “Emergency,” and “Faulted”
do not necessarily imply agreement with specified plant conditions
applicable to ASME Code Class 2 and 3 components for fluid
systems. These designations should be established and justified in
the design specifications.

1636-1 Stress Criteria for Section III, Class 2 and 3 Pumps Subjected to 7/1/77
Upset, Emergency, and Faulted Operating Conditions

Code Case 1636-1 was acceptable subject to the interpretation that

the stress limit designations of “Upset,” “Emergency,” and “Faulted”
do not necessarily imply agreement with specified plant conditions
applicable to ASME Code Class 2 and 3 components for fluid
systems. These designations should be established and justified in
the design specifications.

1689-1 Alternate PWHT Time and Temperature for SA-182 Grade F-22, 1/1/78
SA-387 Grade 22, Class 2, and SA-335 Grade P-22 Section III,
Class 1, 2, 3 and CS

The alternate postweld heat treatment should be prequalified along

with the applicable welding procedure in accordance with ASME
Section IX.

RG 1.84, Rev. 33, Page 35

 Code Case Table 4. Annulment Date
Number Annulled Conditionally Acceptable Code Cases

Title/Condition

1783-1 Qualification of Nondestructive Examination Personnel, Section III, 1/1/79

Division 1

The first sentence of paragraph (1) should be replaced with the

following: “The certification of the Level III nondestructive
examination personnel for the purpose of this Section of the Code
will be the responsibility of the employer of the Level III individual.
If the employer is not a Certificate Holder, then the verification of
such certificate is the responsibility of the Certificate Holder.”

5. Code Cases Superseded by Revised Code Cases

The Code Cases listed in Table 5 were approved in prior versions of the guide and have since
been superseded by revised Code Cases (on or after July 1, 1974). The date in Column 3 indicates the
date on which the ASME approved the revision to the Code Case. Note: Code Cases listed without
conditions were unconditionally approved for use by the NRC.

Table 5. Section III Code Cases That Have Been

Superseded by Revised Code Cases on or after July 1, 1974

Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-5 Nickel-Chromium, Age-Hardenable Alloys (Alloy X750), Section III N-5-1 Published on
(1344-5) 12/13/82

N-7 High Yield Strength Steel, Section III, Division 1, Class 1 Vessels N-7-1 Published on
(1358-5) 12/13/82
The information required to be developed by Note 1 in the
Code Case should be provided in each referencing Safety Analysis
Report.

N-20 SB-163 Nickel-Chromium-Iron Tubing (Alloy 600 and 690) at N-20-1 Published on
(1484-3) Nickel-Iron-Chromium Alloy 800 at a Specified Minimum Yield 9/5/85
N-20-1 Strength of 40.0 Ksi, Section III, Division 1, Class 1 N-20-2 Published on
12/7/87

N-20-2 SB-163 Nickel-Chromium-Iron Tubing (Alloy 600 and 690) at N-20-3 Published on
N-20-3 Nickel-Iron-Chromium Alloy 800 at a Specified Minimum Yield 11/30/88
Strength of 40.0 Ksi and Cold Worked Alloy 800 at a yield strength N-20-4 Published on
of 47.0 Ksi, Section III, Division 1, Class 1 2/26/99

RG 1.84, Rev. 33, Page 36

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-31 Elastomer Diaphragm Valves, Section III, Class 2 and 3 7/18/85

(1540-2)
Each applicant who applies the Code Case should indicate in the
referencing Safety Analysis Report that the service life of the
elastomer diaphragm should not exceed the manufacturer’s
recommended service life. This recommended service life should
not exceed 1/3 of the minimum cycle life as established by the
requirements of paragraph 3 of the Code Case. In addition, the
service life of the elastomer diaphragm should not exceed 5 years,
and the combined service and storage life of the elastomer
diaphragm should not exceed 10 years.

N-55 Inertia and Continuous Drive Friction Welding, Section I, III, IV, 4/5/84
(1609-1) VIII, Division 1 and 2, and IX

N-60 Material for Core Support Structures, Section III, Division 1, N-60-1 Published on
(1618-2) Subsection NG 5/25/83
N-60-1 N-20-2 Published on
Welding of age-hardenable alloy SA-453 Grade 660 and SA-637 9/17/84
Grade 688 should be performed when the material is in the
solution-treated condition.

N-60-2 Material for Core Support Structures, Section III, Division 1, N-60-3 Published on
N-60-3 Subsection NG 9/5/85
N-60-4 N-60-4 Published on
Welding of age-hardenable alloy SA-453 Grade 660 and SA-637 5/13/91
Grade 688 should be performed when the material is in the N-60-5 Published on
solution-treated condition. For SA-479 material, the maximum 2/15/94
yield strength should not exceed 90,000 psi in view of the
susceptibility of this material to environmental cracking.

N-62-2 Internal and External Valve Items, Section III, Division 1, Class 1, N-62-3 Published on
(1621-2) 2 and 3 Line Valves 7/18/85
N-62-3 N-62-4 Published on
N-62-4 9/5/85
N-62-5 N-62-5 Published on
N-62-6 The Code requires that Class 1 and Class 2 valve manufacturers 7/24/89
meet the provisions of NCA 4000, “Quality Assurance,” and, in N-62-6 Published on
addition, Class 3 valve manufacturers should also meet the 12/11/89
provisions of NCA-4000. N-62-7 Published on
5/11/94

RG 1.84, Rev. 33, Page 37

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-71-7 Additional Materials for Component Supports, Section III, N-71-8 Published on
(1644-7) Division 1, Subsection NF, Class 1, 2, 3 and MC Component 5/15/78
N-71-8 Supports N-71-9 Published on
(1644-8) 1/7/80
The maximum measured ultimate tensile strength (UTS) of the
component support material should not exceed 170 Ksi in view of
the susceptibility of high-strength materials to brittleness and stress
corrosion cracking. Certain applications may exist where a UTS
value of up to 190 Ksi could be considered acceptable for a
material and, under this condition, the Design Specification should
specify impact testing for the material. For these cases, it should be
demonstrated by the applicant that: (1) the impact test results for
the material meet Code requirements and (2) the material is not
subject to stress corrosion cracking by virtue of the fact that (a) a
corrosive environment is not present, and (b) the component that
contains the material has essentially no residual stresses or
assembly stresses, and it does not experience frequent sustained
loads in service.

N-71-9 Additional Materials for Component Supports Fabricated by N-71-10 Published on

(1644-9) Welding, Section III, Division 1, Subsection NF, Class 1, 2, 3, and 5/11/81
MC Component Supports

In the last sentence of paragraph 5.3, reference should be made to

paragraph 4.5.2.2, “Alternate Atmosphere Exposure Time Periods
Established by Test,” of the AWS D.1.1 Code for the evidence
presented to and accepted by the Authorized Inspector concerning
exposure of electrodes for longer periods of time.

N-71-10 Additional Materials for Component Supports Fabricated by N-71-11 Published on

N-71-11 Welding, Section III, Division 1, Subsection NF, Class 1, 2, 3, and 6/17/82
MC Component Supports N-71-12 Published on
2/14/83
The maximum measured ultimate tensile strength (UTS) of the
component support material should not exceed 170 Ksi in view of
the susceptibility of high-strength materials to brittleness and stress
corrosion cracking. Certain applications may exist where a UTS
value of up to 190 Ksi could be considered acceptable for a
material and, under this condition, the Design Specification should
specify impact testing for the material. For these cases, it should be
demonstrated by the applicant that: (1) the impact test results for
the material meet Code requirements and (2) the material is not
subject to stress corrosion cracking by virtue of the fact that (a) a
corrosive environment is not present, and (b) the component that
contains the material has essentially no residual stresses or
assembly stresses, and it does not experience frequent sustained
loads in service. In the last sentence of paragraph 5.3, reference
should be made to paragraph 4.5.2.2, “Alternate Atmosphere
Exposure Time Periods Established by Test,” of the AWS D.1.1
Code for the evidence presented to and accepted by the Authorized
Inspector concerning exposure of electrodes for longer periods of
time.

RG 1.84, Rev. 33, Page 38

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-71-12 Additional Materials for Component Supports Fabricated by N-71-13 Published on

Welding, Section III, Division 1, Class 1, 2, 3 and MC 2/20/84

The maximum measured ultimate tensile strength (UTS) of the

component support material should not exceed 170 Ksi in view of
the susceptibility of high-strength materials to brittleness and stress
corrosion cracking. Certain applications may exist where a UTS
value of up to 190 Ksi could be considered acceptable for a
material and, under this condition, the Design Specification should
specify impact testing for the material. For these cases, it should be
demonstrated by the applicant that: (1) the impact test results for
the material meet Code requirements and (2) the material is not
subject to stress corrosion cracking by virtue of the fact that (a) a
corrosive environment is not present, and (b) the component that
contains the material has essentially no residual stresses or
assembly stresses, and it does not experience frequent sustained
loads in service. In the last sentence of paragraph 5.3, reference
should be made to paragraph 4.5.2.2, “Alternate Atmosphere
Exposure Time Periods Established by Test,” of the AWS D.1.1
Code for the evidence presented to and accepted by the Authorized
Inspector concerning exposure of electrodes for longer periods of
time. Paragraph 16.2.2 is not acceptable as written and should be
replaced with the following: ?When not exempted by 16.2.1, above,
the postweld heat treatment shall be performed in accordance with
NF-4622 except that for ASTM A-710 Grade A material, it should
be at least 1000EF (540EC) and should not exceed 1150EF (620EC)
for Class 1 and Class 2 material and 1175EF (640EC) for Class 3
material. The new holding time at temperature for weld thickness
(nominal) should be 30 minutes for ½ inch or less, 1 hour per inch
for thickness over ½ inch to 5 inches, and 5 hours plus 15 minutes
for each additional inch over 5 inches.”

RG 1.84, Rev. 33, Page 39

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-71-13 Additional Materials for Subsection NF, Classes 1, 2, 3 and MC N-71-14 Published on
N-71-14 Component Supports Fabricated by Welding, Section III, 12/5/85
N-71-15 Division 1 N-71-15 Published on
N-71-16 12/16/86
N-71-17 N-71-16 Published on
The maximum measured ultimate tensile strength (UTS) of the 2/12/93
component support material should not exceed 170 Ksi in view of N-71-17 Published on
the susceptibility of high-strength materials to brittleness and stress 12/31/96
corrosion cracking. Certain applications may exist where a UTS N-71-18 Published on
value of up to 190 Ksi could be considered acceptable for a 12/8/00
material and, under this condition, the Design Specification should
specify impact testing for the material. For these cases, it should be
demonstrated by the applicant that:
(1) the impact test results for the material meet Code requirements,
and (2) the material is not subject to stress corrosion cracking by
virtue of the fact that (a) a corrosive environment is not present,
and (b) the component that contains the material has essentially no
residual stresses or assembly stresses, and it does not experience
frequent sustained loads in service. In the last sentence of
paragraph 5.3, reference should be made to paragraph 4.5.2.2,
“Alternate Atmosphere Exposure Time Periods Established by
Test,” of the AWS D.1.1 Code for the evidence presented to and
accepted by the Authorized Inspector concerning exposure of
electrodes for longer periods of time. Paragraph 16.2.2 is not
acceptable as written and should be replaced with the following:
When not exempted by 16.2.1, above, the postweld heat treatment
should be performed in accordance with NF-4622 except that for
ASTM A-710 Grade A material, it should be at least 1000EF
(540EC) and should not exceed 1150EF (620EC) for Class 1 and
Class 2 material and 1175EF (640EC) for Class 3 material. The
new holding time at temperature for weld thickness (nominal)
should be 30 minutes for ½ inch or less, 1 hour per inch for
thickness over ½ inch to 5 inches, and 5 hours plus 15 minutes for
each additional inch over 5 inches. The fracture toughness of
Classes 1, 2, and 3 component supports should be characterized in
accordance with Section 5.3.4 of the USNRC Standard Review
Plan (NUREG-0800) or on a case-by-case basis. The fracture
toughness requirements as listed in this Code Case apply only to
piping supports and not to Class 1, Class 2, and Class 3 component
supports.

N-95-1 Determination of Capacities of Vacuum Relief Valves, Section III, N-95-2 Published on
(1701-1) Division 1 and 2, Class MC 7/9/79

N-102-1 Postweld Heat Treatment of P-1 Material, Section III, Class MC N-102-2 Published on
(1714-2) 8/28/78

RG 1.84, Rev. 33, Page 40

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-119-2 Pump Internal Items, Section III, Division 1, Class 1, 2, and 3 N-119-3 Published on
(1739-2) 8/25/80
N-119-3 N-119-4 Published on
(1739-3 12/1/80
N-119-4 N-119-5 Published on
(1739-4) 7/18/85
N-119-5 N-119-6 Published on
3/14/91

N-122 Stress Indices for Structural Attachments, Class 1, Section III, N-122-1 Published on
Division 1 7/24/89

N-133 Use of SB-148 Alloy CA954 for Section III, Division 1, Class 2 or 3 N-133-1 Published on
(1761-1) Flanged End Valves 1/14/77

N-133-1 Use of SB-148 Alloys 952 and 954, Section III, Division 1, Class 3 N-133-2 Published on
N-133-2 5/19/85
N-133-3 Published on
7/18/85

N-154 Projection Resistance Welding of Valve Seats, Section III, N-154-1 Published on
(1791) Division 1, Class 1, 2and 3 Valves 1/14/80

N-160 Finned Tubing for Construction, Section III, Division 1 N-160-1 Published on
(1797) 7/18/85

N-188 Use of Welded Ni-Fe-Cr-Mo-Cu (Alloy 825) and Ni-Cr-Mo-Cb N-188-1 Published on
(Alloy 625) Tubing, Section III, Division 1, Class 3 1/1/78

N-192 Use of Flexible Hose for Section III, Division 1, Class 1, 2, and 3 N-192-1 Published on
N-192-1 Construction 8/30/79
N-192-2 N-192-3 Published on
The applicant should indicate system application, design and 9/16/02
operating pressure, and pressure-temperature rating of the flexible N-192-3 Published on
hose. Data to demonstrate compliance of the flexible hose with 7/23/02
NC/ND-3649, particularly NC-ND-3649.4(e), are required to be
furnished with the application.

N-196 Exemption from the Shake-Down Requirements When Plastic N-196-1 Published on
Analysis is Performed for Section III, Division 1, Class 1 1/8/79
Construction

N-207 Use of Modified SA-479 Type XM-19 for Section III, Division 1, N-207-1 Published on
Class 1, 2, or 3 Construction 3/19/79

N-214 Use of SA-351, Grade CN7M, for Valves for Section III, N-214-1 Published on
N-214-1 Division 1, Construction 9/7/82
N-214-2 Published on
5/25/83

N-224 Use of ASTM A500 Grade B and ASTM A501 Structural Tubing for N-224-1 Published on
Welded Attachments for Section III, Class 2 and 3 Construction 5/11/81

RG 1.84, Rev. 33, Page 41

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-237 Hydrostatic Testing of Internal Piping, Section III, Division 1 N-237-1 Published on
9/7/82

N-237-1 Hydrostatic Testing of Internal Piping, Section III, Division 1, N-237-2 Published on
Classes 2 and 3 5/25/83

N-242 Materials Certification, Section III, Division 1, Classes 1, 2, 3, MC, N-242-1 Published on
and CS Construction 4/10/80

Applicants should identify the components and supports requiring

the use of paragraphs 1.0 through 4.0 of the Code Case in their
Safety Analysis Reports.

N-246 Use of SB-169 Alloy CA614, Section III, Division 1, Class 3 N-246-1 Published on
9/7/82

N-246-1 SB-169, Alloy C 61400, Section III, Division 1, Class 3 N-246-2 Published on
5/25/83

N-249 Additional Materials for Component Supports Fabricated Without N-249-1 Published on
Welding, Section III, Division 1, Subsection NF, Class 1, 2, 3, and 5/11/81
MC Component Supports

Footnote 2 of the Code Case should apply to all materials listed in

Tables 1, 2, 3, 4, and 5 of the Code Case and should be so indicated
on line 5 of the “Reply.”

N-249-1 Additional Materials for Component Supports Fabricated Without N-249-2 Published on
Welding, Section III, Division 1, Subsection NF, Class 1, 2, 3, and 6/17/82
MC Component Supports

Paragraph 7 of the ”Reply” should reference the requirements of

NF-2600 instead of NF-2800. This is a typographical error in that
NF-2800 does not exist.

N-249-2 Additional Materials for Subsection NF Class 1, 2, 3, and MC N-249-3 Published on

N-249-3 Component Supports Fabricated Without Welding, Section III, 2/14/83
Division 1 N-249-4 Published on
2/20/84

N-249-4 Additional Material for Subsection NF, Classes 1, 2, 3, and MC N-249-5 Published on
N-249-5 Component Supports Fabricated Without Welding, Section III, 9/17/84
Division 1 N-249-6 Published on
4/8/85
The fracture toughness requirements as listed in Code Case N-249-
4 apply only to piping supports and not to Classes 1, 2, and 3
component supports. The fracture toughness of Classes 1, 2, and 3
component supports should be characterized in accordance with
Section 5.3.4 of the USNRC Standard Review Plan
(NUREG-0800) or on a case-by-case basis.

RG 1.84, Rev. 33, Page 42

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-249-6 Additional Material for Subsection NF, Classes 1, 2, 3, and MC N-249-7 Published on
N-249-7 Component Supports Fabricated Without Welding, Section III, 9/5/85
N-249-8 Division 1 N-249-8 Published on
N-249-9 12/5/85
N-249-10 N-249-9 Published on
N-249-11 12/16/86
N-249-12 N-249-10 Published
N-249-13 on 5/6/89
The fracture toughness requirements apply only to piping supports N-249-11 Published
and not to Classes 1, 2, and 3 component supports. The fracture on 5/13/91
toughness of Classes 1, 2, and 3 component supports should be N-249-12 Published
characterized in accordance with Section 5.3.4 of the USNRC on 2/12/93
Standard Review Plan (NUREG-0800) or on a case-by-case basis. N-249-13 Published
The following is to be added to paragraph (5) of the Code Case: on 5/11/94
?For these cases, it should be demonstrated by the Owner that: (1) N-249-14 Published
the impact test results for the material meet Code requirements, and on 12/8/00
(2) the material is not subject to stress corrosion cracking by virtue
of the fact that: (a) a corrosive environment is not present and (b)
the component that contains the material has essentially no residual
stresses or assembly stresses, and it does not experience frequent
sustained loads in service.”

N-260 Weld Repair of SA-182 Type 316 Forgings, Section III, Division 1, N-260-1 Published on
Classes 1, 2, 3, and MC 7/18/85

N-260-1 Weld Repair of SA-182 Type 316 Forgings, Section III, Division 1, N-260-2 Published on
Classes 1, 2, 3, and MC 12/5/85

Type 308 L welding materials should not be used to repair grade F

316 N forgings because of the difference in strength levels.

N-265 Modified SA-487 Castings, Section III, Division 1, Class 1 N-265-1 Published on
5/19/85

N-299 Use of Nickel-Chromium-Molybdenum-Columbium Alloy 625 N-299-1 Published on

Forgings, Section III, Division 1, Class 2 and Class 3 Components 7/18/85

N-304 Use of 20 Cr-25Ni-6Mo (Alloy UNS N08366) Welded Tubes for N-304-1 Published on
N-304-1 Section III, Division 1, Classes 2 and 3 Construction 7/12/84
N-304-2 N-304-2 Published on
N-304-3 5/19/85
N-304-3 Published on
12/5/85
N-304-4 Published on
2/23/87

N-309 Identification of Materials for Component Supports, Section III, N-309-1 Published on
Division 1 5/11/84

RG 1.84, Rev. 33, Page 43

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-318 Procedure for Evaluation of the Design of Rectangular Cross N-318-1 Published on
N-318-1 Section Attachments on Class 2 or 3 Piping, Section III, Division 1 2/20/84
N-318-2 N-318-2 Published on
N-318-3 7/12/84
N-318-4 N-318-3 Published on
Applicants should identify in their Safety Analysis Report: (1) the 9/5/85
method of lug attachment, (2) the piping system involved, and (3) N-318-4 Published o
the location in the system where the Code Case is to be applied. 12/11/89
N-318-5 Published on
4/28/94

N-319 Alternate Procedure for Evaluation of Stresses in Butt Weld N-319-1 Published on
N-319-1 Elbows in Class 1 Piping, Section III, Division 1 7/24/89
N-319-2 N-319-2 Published on
8/14/90
N-319-3 Published on
1/17/00

N-321 Use of Modified SA-249, Type 304, Section III, Division 1, Class 1 N-321-1 Published on
Construction 12/5/85

N-337 Use of ASTM B 525-70 Grade II, Type II, Sintered Austenitic N-337-1 Published on
Stainless Steel for Class 2, 3, and MC Component Standard 7/18/85
Supports, Section III, Division 1

N-345 Attachment of AMS 5382 Alloy 31 Seat Rings by Friction Welding, N-345-1 Published on
Section III, Division 1, Classes 1, 2, and 3 12/13/82

N-352 Use of SA-638 Grade 660 Forgings and Bars Below 700EF N-352-1 Published on
Without Stress Rupture Tests, Section III, Division 1 7/18/85

N-362 Alternate Rules for Pressure Testing of Containment Items, N-362-1 Published on
Section III, Division 1 12/13/82

N-362-1 Pressure Testing of Containment Items, Section III, Division 1, N-362-2 Published on
Classes 1, 2, and MC 7/12/84

N-370 Modified SA-705 Grade XM-13 Forgings, Section III, Division 1 N-370-1 Published on
N-370-1 7/18/85
N-370-2 Published on
12/5/85

N-371 12Cr-1W-1Mo-1/4V Martensitic Stainless Steel Valve Internals, N-371-1 Published on

Section III, Division 1 7/18/85

N-373-1 Alternative PWHT Time at Temperature for P-No. 5 Material, N-373-2 Published on
Section III, Division 1, Classes 1, 2, and 3 9/7/01

N-379 Bimetallic Tubing Section III, Division 1, Class 1 N-379-1 Published on

7/18/85

RG 1.84, Rev. 33, Page 44

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-383 Weld Repair of SA-182 Austenitic Forgings, Section III, Division 1, N-383-1 Published on
Classes 1, 2, and 3 7/18/85

Applicants who apply the provisions of the Code Case to permit

material manufacturers to weld repair austenitic forgings without
resolution heat treatment should provide justification to the NRC
staff (via the Safety Analysis Report) why this is acceptable for
their applications, including their evaluation of the susceptibility
for stress corrosion cracking.

N-391 Procedure for Evaluation of the Design of Hollow Circular Cross N-391-1 Published on
Section Welded Attachments on Class 1 Piping, Section III, 7/24/89
Division 1

N-391-1 Procedure for Evaluation of the Design of Hollow Circular Cross N-391-2 Published on
Section Welded Attachments on Class 1 Piping, Section III, 8/24/95
Division 1

The following typographical errors need to be corrected: (1) In

equation (3) the + sign should be changed to an = sign, and (2) In
equation (4) the first + sign should be changed to an = sign.

N-392 Procedure for Evaluation of the Design of Hollow Circular Cross N-392-1 Published on
Section Welded Attachments on Classes 2 and 3 Piping, Section III, 12/11/89
Division 1

N-392-1 Procedure for Evaluation of the Design of Hollow Circular Cross N-392-2 Published on
Section Welded Attachments on Classes 2 and 3 Piping, Section III, 12/11/92
Division 1

Applicants should identify in their Safety Analysis Report: (1) the

method of lug attachment, (2) the piping system involved, and (3)
the location in the system where the Code Case is to be applied.

N-392-2 Procedure for Evaluation of the Design of Hollow Circular Cross N-392-3 Published on
Section Welded Attachments on Classes 2 and 3 Piping, Section III, 12/12/94
Division 1

Applicants should identify in their Safety Analysis Report: (1) the

method of lug attachment, (2) the piping system involved, and (3)
the location in the system where the Code Case is to be applied.

RG 1.84, Rev. 33, Page 45

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-411 Alternative Damping Values for Seismic Analysis of Classes 1, 2, N-411-1 Published on
and 3 Piping Sections, Section III, Division 1 2/20/86

(1) The damping values specified may be used in analyzing

piping response for seismic and other dynamic loads being
filtered through building structures provided response mode
frequencies are limited to 33 Hz and below. Within this
range, the Code Case damping should be used completely
and consistently, if used at all. (For equipment other than
piping, the damping values specified in Regulatory Guide
1.61, “Damping Values for Seismic Design of Nuclear
Power Plants,” should be used).
(2) The damping values specified may be used only in those
analyses in which current seismic spectra and procedures
have been employed. Such use should be limited only to
response spectral analyses (similar to that used in the study
supporting its acceptance. (Reference NUREG/CR-3526.)
The acceptance of the use with other types of dynamic
analyses (e.g., time-history analysis) is pending further
justification.
(3) When used for reconciliation work or for support
optimization of existing designs, the effects of increased
motion on existing clearances and on line mounted
equipment should be checked.
(4) This Code Case is not appropriate for analyzing the dynamic
response of piping systems using supports designed to
dissipate energy by yielding (i.e., the design of which is
covered by Code Case N-420).
(5) This Code Case is not applicable to piping in which stress
corrosion cracking has occurred unless a case-specific
evaluation is made and is reviewed by the NRC staff.

N-418 Use of Seamless Ni-Fe-Cr-Mo-Cu Low Carbon (UNS N08028 and N-418-1 Published on
UNS N08904) Tubing, Section III, Division 1, Classes 2 and 3 7/30/86

N-438 Fe-24.5Ni-21Cr-6.5 Mo-0.2N (Alloy UNS N08367) Seamless and N-438-1 Published on
N-438-1 Welded Pipe, Tube, Plate, Bar, Fittings, and Forgings, Class 2 and 3/8/89
3 Construction, Section III, Division 1 N-438-1 Reinstated on
N-438-2 5/24/96
N-438-3 Published on
7/27/92

N-438-3 UNS N08367 Material, Section III, Division 1, Class 2 and 3 N-438-4 Published on
Construction 5/24/96

N-439 Use of 20Cr-18Ni-6Mo (Alloy UNS S31254) Forgings, Plate, N-439-1 Published on
Seamless and Welded Pipe, and Welded Tube, Class 2 and 3 7/10/00
Construction, Section III, Division 1

N-440 Use of 20Cr-18Ni-6Mo (Alloy UNS J93254) Castings, Class 2 and N-440-1 Published on
3 Construction, Section III, Division 1 7/10/00

RG 1.84, Rev. 33, Page 46

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-441 Use of 20Cr-18Ni-6Mo (Alloy UNS S31254) Fittings, Class 2 and 3 N-441-1 Published on
N-441-1 Construction, Section III, Division 1 11/25/92
N-441-2 Published on
7/10/00

N-443 High Yield Strength Cr-Mo Steel, Class 1 Components, Section III, N-443-1 Published on
N-443-1 Division 1 3/8/89
N-443-2 Published on
11/11/99

N-453 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N-453-1 Published on

N08925) Welded Pipe for Class 2 and 3 Construction, Section III, 11/30/88
Division 1

N-453-1 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N-453-2 Published on

N08925) Seamless and Welded Pipe for Class 2 and 3 4/30/92
Construction, Section III, Division 1

N-453-2 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N-453-3 Published on

N08925 and N08926) Seamless and Welded Pipe for Class 2 and 3 12/12/95
Construction, Section III, Division 1

N-454 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N-454-1 Published on

N08925) Wrought Fittings for Class 2 and 3 Construction, 4/30/92
Section III, Division 1

N-455 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N-455-1 Published on

N08925) Forged Flanges and Fittings for Class 2 and 3 4/30/92
Construction, Section III, Division 1

N-466 Modified 9Cr-1Mo Material, Section III, Division 1, Classes 1, 2, N-466-1 Published on
and 3 4/30/90

N-469 Martensitic Stainless Steel for Class 1, 2, and 3 Components, N-469-1 Published on
Section III, Division 1 6/14/00

N-474 Design Stress Intensities and Yield Strength Values for Alloy 690 N-474-1 Published on
With a Minimum Yield Strength of 35 ksi, Class 1 Components, 3/5/90
Section III, Division 1

N-474-1 Design Stress Intensities and Yield Strength Values for UNS N-474-2 Published on
N06690 With a Minimum Specified Yield Strength of 35 ksi, Class 1 12/9/93
Components, Section III, Division 1

N-484 Real Time Radioscopic Examination of Welds, Section III, N-484-1 Published on
Division 1 12/16/91

N-492 Grade 9 Titanium Alloy Tubing, Section III, Division 1, Class 1, 2, N-492-1 Published on
and 3 5/11/94

N-497 Use of Fe-Ni-Cr-Mo-N (C-N-3MN) Cast Materials, Section III, N-497-1 Published on
Division 1, Class 2 and 3 Construction 12/9/93

RG 1.84, Rev. 33, Page 47

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

N-510 Borated Stainless Steel for Class CS Core Support Structures and N-510-1 Published on
Class 1 Components, Section III, Division 1 12/12/94

N-520 Alternative Rules for Renewal of N-type Certificates for Plants Not N-520-1 Published on
in Active Construction, Section III, Division 1 10/26/94

N-564 UNS J93380, Alloy CD3MWCuN, Class 2 and 3 Construction, N-564-1 Published on
N-564-1 Section III, Division 1 7/30/98
N-564-2 Published on
12/31/96

N-580 Use of Alloy 600 With Columbium Added, Section III, Division 1 N-580-1 Published on
5/20/98

N-625 Ni-Cr-Mo Alloy (UNS N06059) Welded Construction to 800EF, N-625-1 Published on
Section III, Division 1 3/28/01

1332-6 Requirements for Steel Forgings, Section III and VIII, Division 1 1332-7 Published on
1/8/79

1335-9 Requirements for Bolting Materials 1335-10 Published on

8/28/78

1337-9 Special Type 403 Modified Forgings or Bars, Section III 1337-10 Published on
1337-10 4/28/75
1335-11 Published on
5/15/78

1395-3 SA-508, Class 2 Forgings with Modified Manganese Content, 1395-4 Published on
Section III or Section VIII, Division 2 1/8/79

1407-2 Time of Examination for Class 1, 2, and 3, Section III Vessels 1407-3 Published on
7/1/74

1414-3 High Yield Strength Cr-Mo Steel for Section III, Division 1, 1414-4 Published on
1414-4 Class 1 Vessels 3/1/76
1414-5 Published on
The information required to be developed by Note 1 in the 8/9/77
Code Case should be provided in each referencing Safety Analysis
Report.

1484-1 SB-163 Nickel-Chromium-Iron Tubing (Alloy 600) at a Specified 1484-2 Published on

Minimum Yield Strength of 40.0 Ksi, Section III, Class 1 11/4/74

1484-2 SB-163 Nickel-Chromium-Iron Tubing (Alloy 600 and 690) at a 1484-3 Published on
Specified Minimum Yield Strength of 40.0 Ksi, Section III, Class 1 8/13/76

1492 Post Weld Heat Treatment, Section I, III and VIII, Division 1 and 2 1492-1 Published on
3/3/75

1508 Allowable Stresses, Design Intensity and/or Yield Strength Values, 1508-1 Published on
Section I, III, and VIII, Divisions 1 and 2 6/30/75

1516-1 Welding of Seats in Valves for Section III Applications 1516-2 Published on
8/11/75

RG 1.84, Rev. 33, Page 48

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

1540-1 Elastomer Diaphragm Valves, Section III, Classes 2 and 3 1540-2 Published on
1/14/77

1541-1 Hydrostatic Testing of Embedded Class 2 and Class 3 Piping for 1541-2 Published on
Section III Construction 9/30/76

1541-2 Hydrostatic Testing of Embedded Class 2 and Class 3 Piping for 1541-3 Published on
Section III, Division 1 Construction 5/15/78

1552 Design by Analysis of Section III, Class 1 Valves 1552-1 Published on

8/29/77

1553 Upset Heading and Roll Threading of SA-453 for Bolting in 1553-1 Published on
Section III 3/3/75

1555 Certification of Safety Relief Valves on Liquids 1555-1 Published on

1/14/77

1557-2 Steel Products Refined by Secondary Remelting 1557-3 Published on

1/8/79

1606 Stress Criteria for Section III, Class 2 and 3 Piping Subjected to 1606-1 Published on
Upset, Emergency, and Faulted Operating Conditions 12/16/74

Code Case 1606 was acceptable subject to the interpretation that

the stress limit designations of “Upset,” “Emergency,” and
“Faulted” do not necessarily imply agreement with specified plant
conditions applicable to ASME Code Class 2 and 3 components for
fluid systems. These designations should be established and
justified in the design specifications.

1607 Stress Criteria for Section III, Classes 2 and 3 Vessels Subjected to 1607-1 Published on
Upset, Emergency, and Faulted Operating Conditions 11/4/74

Code Case 1607 was acceptable subject to the interpretation that

the stress limit designations of “Upset,” “Emergency,” and
“Faulted” do not necessarily imply agreement with specified plant
conditions applicable to ASME Code Class 2 and 3 components for
fluid systems. These designations should be established and
justified in the design specifications.

1618 Material for Core Support Structures, Section III, Subsection NG 1618-1 Published on
3/3/75
(a) Welding of age-hardenable alloy SA-453 Grade 660 and SA-
637 Grade 688 should be performed when the material is in the
solution-treated condition. (b) Use of alloy ASTM A-564 Grade
631 is not acceptable on a generic basis.

1618-1 Material for Core Support Structures, Section III, Subsection NG 1618-2 Published on
3/1/76
Welding of age-hardenable alloy SA-453 Grade 660 and SA-637
Grade 688 should be performed when the material is in the
solution-treated condition.

RG 1.84, Rev. 33, Page 49

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

1626 Normalized and Tempered 1-1/4 Cr Low Alloy Steel Forgings, 1626-1 Published on
Section I, Section III, and Section VIII, Division 1 and 2 1/8/79

1634 Use of SB-359 for Section III, Class 3 Construction 1634-1 Published on
1634-1 8/12/74
1634-2 Published on
8/13/76

1644 Additional Materials for Component Supports, Section III, 1644-1 Published on
1644-1 Subsection NF, Class 1, 2, 3, and MC Construction 4/28/75
1644-2 1644-2 Published on
1644-3 6/30/75
The maximum measured ultimate tensile strength of the component 1644-3 Published on
support material should not exceed 170 Ksi. 11/3/75
1644-4 Published on
3/1/76

1644-4 Additional Materials for Component Supports and Alternate 1644-5 Published on
1644-5 Design Requirements for Bolted Joints, Section III, Division 1, 8/13/76
1644-6 Subsection NF, Class 1, 2, 3, and MC Construction 1644-6 Published on
3/3/77
The maximum measured ultimate tensile strength (UTS) of the 1644-7 Published on
component support material should not exceed 170 Ksi in view of 11/21/77
the susceptibility of high-strength materials to brittleness and stress
corrosion cracking. Certain applications may exist where a UTS
value of up to 190 Ksi could be considered acceptable for a
material and, under this condition, the Design Specification should
specify impact testing for the material. For these cases, it should be
demonstrated by the applicant that (1) the impact test results for the
material meet code requirements, and (2) the material is not subject
to stress corrosion cracking by virtue of the fact that (a) a corrosive
environment is not present and (b) the component that contains the
material has essentially no residual stresses or assembly stresses,
and it does not experience frequent sustained loads in service.

1682 Alternate Rules for Material Manufacturers and Suppliers, 1682-1 Published on
Section III, Subarticle NA-3700 8/11/75

1683 Bolt Holes for Section III, Division 1, Class 1, 2, 3 and MC 1683-1 Published on
Component Supports 3/1/76

1689 Alternate PWHT Time and Temperature for SA-182 Grade F22, 1689-1 Published on
Section III, Class 1, 2, 3 and CS 9/10/76

The alternate postweld heat treatment should be prequalified along

with the applicable welding procedure in accordance with ASME
Section IX.

1695 Brazing, Section III, Class 3 1695-1 Published on

11/3/75

1701 Determination of Capacities of Vacuum Relief Valves, Section III, 1701-1 Published on
Class MC 3/20/78

RG 1.84, Rev. 33, Page 50

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

1702 Flanged Valves Larger than 24 inches for Section III, Class 1, 2 1702-1 Published on
and 3 Construction 7/11/77

1714 Postweld Heat Treatment of P-1 Material, Section III, Class MC 1714-1 Published on
7/11/77

1720 Weld End Preparation for Section III, Division Construction 1720-1 Published on
3/1/76
Weld end preparations other than those shown in Figures 1, 2, and
3 of the Code Case are not acceptable on a generic basis. Such
alternative end preparations should be treated on a case-by-case
basis.

1720-1 Weld End Preparation for Section III, Division Construction 1720-2 Published on
11/20/78
The acceptance of weld end preparations other than those shown in
Figures 1, 2, and 3 of the Code Case should be evaluated on a case-
by-case basis.

1722 Vacuum, Carbon Deoxidized SA-508 Forgings, Section III, 1722-1 Published on
Division 1, and VIII, Division 1 and 2 1/8/79

1741 Interim Rules for the Required Number of Impact Tests for Rolled 1741-1 Published on
Shapes, Section III, Division 1, Subsection NF, Component 1/14/77
Supports

1755 Alternate Rules for Examination of Welds in Piping, Class 1 and 2 1755-1 Published on
Construction, Section III, Division 1 1/14/77

1759 Material for Internal Pressure Retaining Items for Pressure Relief 1759-1 Published on
Valves, Section III, Division 1, Class 1, 2, and 3 5/15/78

Applicants using this Case should also use Code Case 1711 for the
design of pressure relief valves.

1761 Use of SG-148 Alloy CA954 for Section III, Division 1, Class 2 or 1761-1 Published on
3 Flanged End Valves 1/14/77

1769 Qualification of NDE Level III Personnel, Section III, Division 1 1769-1 Published on
2/16/77

1774 Minimum Wall Thickness for Class 2 and 3 Valves, Section III, 1774-1 Published on
Division 1 7/11/77

1780 Hydrostatic Testing and Stamping of Pumps for Class 1 1780-1 Published on
Construction, Section III, Division 1 3/10/78

RG 1.84, Rev. 33, Page 51

 Code Case Table 5. Code Cases Superseded by Revised Code Cases Revision
Number Date

Each licensing application in which the Code Case is to be used

should present information that satisfactorily demonstrates that the
subassembly tests adequately simulate the pressure loadings. Also,
the closure fixture for the test subassembly should adequately
simulate the rigidity of adjacent subassemblies and also simulate
the interface loadings from adjacent subassemblies that would
result from a hydrostatic pressure test of a complete pump
assembly. As a minimum, the closure fixture should impose loads
that result in stresses equal to or greater than those induced during
the hydrostatic test of a complete pump assembly. It is not intended
that piping reactor loadings be simulated in the hydrostatic testing.

1783 Qualification of Nondestructive Personnel, Section III, Division 1 1783-1 Published on

1/14/77
The first sentence of paragraph (1) should be replaced with the
following: “The certification of the Level III nondestructive
examination personnel for the purposes of this Section of the Code
shall be the responsibility of the employer of the Level III
individual. If the employer is not a Certificate Holder, then the
verification of such certificate is the responsibility of the Certificate
Holder.”

RG 1.84, Rev. 33, Page 52

 D. IMPLEMENTATION
The purpose of this section is to provide information to applicants and licensees regarding
the NRC staff’s plans for using this guide. No backfitting is intended or approved in connection with
the issuance of this guide.

Except when an applicant or licensee proposes or has previously established an acceptable

alternative method for complying with specified portions of the NRC’s regulations, the methods described
in this guide will be used in evaluating (1) submittals in connection with applications for construction
permits, design certifications, operating licenses, and combined licenses, and (2) submittals from
operating reactor licensees who voluntarily propose to initiate system modifications that have a clear
nexus with this guidance.

E. REGULATORY ANALYSIS
A separate regulatory analysis was not prepared for this regulatory guide. The regulatory basis
for this guide is the regulatory analysis prepared for the amendment to 10 CFR 50.55a, “Codes and
Standards,” that incorporates by reference this regulatory guide.

A copy of the regulatory analysis for the amendment to 10 CFR 50.55a is available for inspection
and copying for a fee at the NRC’s Public Document Room (PDR), which is located at 11555 Rockville
Pike, Rockville, Maryland; the PDR’s mailing address is USNRC PDR, Washington, DC 20555-0001.
The PDR can also be reached by telephone at (301) 415-4737 or (800) 397-4205, by fax at
(301) 415-3548, and by email to PDR@nrc.gov. In addition, the regulatory analysis is available
electronically through the NRC’s Agencywide Documents Access and Management System (ADAMS)
at http://www.nrc.gov/reading-rm/adams.html, under Accession No. ML043640544.

RG 1.84, Rev. 33, Page 53

 APPENDIX A

SUPPLEMENTS ADDRESSED IN REVISION 33

TO REGULATORY GUIDE 1.84

Edition Supplement Number BNCS1 Approval Date of Code Cases in Supplement2

1998 12 March 28, 2001

2001 1 August 14, 2001

2001 2 September 18, 2001

2001 3 September 18, 2001

2001 4 April 19, 2002

2001 5 July 23, 2002

2001 6 September 17, 2002

1
BNCS = ASME Board on Nuclear Codes and Standards
2
Publication in supplement was between 5 and 8 months after BNCS approval.

Appendix A to RG 1.84, Rev. 33, Page A-1

 APPENDIX B

NUMERICAL LISTING OF SECTION III CODE CASES

IN SUPPLEMENT 12, 1998 EDITION,
THROUGH SUPPLEMENT 6, 2001 EDITION1

N-4-11 N-595-3
N-20-4 N-607
N-60-5 N-608
N-71-18 N-625-1
N-192-2 N-626
N-192-3 N-631
N-205 N-635
N-208-2 N-636
N-213 N-637
N-249-14 N-644
N-292 N-650
N-304-4 N-655
N-329 N-656
N-345-1 N-657
N-373-1
N-373-2
N-387
N-391-2
N-392-3
N-394
N-395
N-405-1
N-439-1
N-440-1
N-441-2
N-453-3
N-483-3
N-493
N-505
N-511
N-525
N-539
N-548
N-550
N-558
N-570
N-572
N-594

1
Except for those Code Cases pertaining to high-temperature gas-cooled reactors; Section III, Division 2; liquid metal;
and submerged spent fuel waste casks.

Appendix B to RG 1.84, Rev. 33, Page B-1

 APPENDIX C

NUMERICAL LISTING OF SECTION III CODE CASES1

AND TABLE WHERE EACH CODE CASE IS LISTED
N-1-7 [T3] N-55 [T5] N-94 [T3] N-142-1 [T3]
N-2 [T3] N-55-1 [T3] N-95-1 [T5] N-146-1 [T4]
N-3-10 [T3] N-56 [T3] N-95-2 [T3] N-147 [T3]
N-4-11 [T1] N-60 [T5] N-96-1 [T3] N-148 [T3]
N-5 [T5] N-60-1 [T5] N-100 [T4] N-154 [T5]
N-5-1 [T3] N-60-2 [T5] N-101 [T3] N-154-1 [T1]
N-6 [T3] N-60-3 [T5] N-102-1 [T5] N-155-2 [T2]
N-7 [T5] N-60-4 [T5] N-102-2 [T3] N-156 [T3]
N-7-1 [T1] N-60-5 [T1] N-106-2 [T4] N-157 [T3]
N-9-4 [T3] N-61 [T3] N-107-1 [T3] N-158 [T3]
N-10 [T3] N-62-2 [T5] N-108 [T3] N-159 [T3]
N-11-5 [T4] N-62-3 [T5] N-109 [T3] N-160 [T5]
N-15 [T3] N-62-4 [T5] N-110 [T4] N-160-1 [T1]
N-17 [T3] N-62-5 [T5] N-111 [T3] N-171 [T1]
N-20 [T5] N-62-6 [T5] N-114 [T3] N-174 [T3]
N-20-1 [T5] N-62-7 [T2] N-115 [T3] N-175 [T4]
N-20-2 [T5] N-65-1 [T3] N-116 [T4] N-176-1 [T3]
N-20-3 [T5] N-66-1 [T3] N-119-2 [T5] N-177 [T3]
N-20-4 [T3] N-68 [T3] N-119-3 [T5] N-178 [T3]
N-22 [T3] N-71-7 [T5] N-119-4 [T5] N-179 [T3]
N-24 [T3] N-71-8 [T5] N-119-5 [T5] N-180 [T3]
N-26 [T3] N-71-9 [T5] N-119-6 [T3] N-181 [T3]
N-30-1 [T3] N-71-10 [T5] N-121 [T3] N-182 [T3]
N-31 [T5] N-71-11 [T5] N-122 [T5] N-183 [T3]
N-31-1 [T4] N-71-12 [T5] N-122-2 [T1] N-184 [T3]
N-32-3 [T3] N-71-13 [T5] N-123 [T3] N-188 [T5]
N-32-4 [T4] N-71-14 [T5] N-124 [T3] N-188-1 [T3]
N-33 [T3] N-71-15 [T5] N-125 [T3] N-189 [T3]
N-35-1 [T3] N-71-16 [T5] N-126 [T3] N-190 [T3]
N-37-3 [T3] N-71-17 [T5] N-127 [T3] N-192 [T5]
N-41 [T3] N-71-18 [T2] N-131-1 [T1] N-192-1 [T5]
N-43 [T3] N-77 [T3] N-133 [T5] N-192-2 [T5]
N-46 [T3] N-81 [T3] N-133-1 [T5] N-192-3 [T1]
N-48-2 [T3] N-82 [T3] N-133-2 [T5] N-193 [T3]
N-49-4 [T3] N-84 [T3] N-133-3 [T1] N-196 [T5]
N-50-1 [T3] N-90 [T3] N-139 [T3] N-196-1 [T3]
N-51-2 [T3] N-92 [T4] N-140 [T3] N-199 [T4]

1
Except for those Code Cases pertaining to high-temperature gas-cooled reactors; Section III, Division 2; liquid metal;
and submerged spent fuel waste casks.
2
Code Case is not acceptable for use; See Regulatory Guide 1.193.
3
Code Case was not approved for use and subsequently, not listed in previous versions of RG 1.84 or RG 1.85.

Appendix C to RG 1.84, Rev. 33, Page C-1

N-204 [T3] N-249-10 [T5] N-318 [T5] N-372 [T3]
N-205 [T1] N-249-11 [T5] N-318-1 [T5] N-373-1 [T5]
N-206 [T3] N-249-12 [T5] N-318-2 [T5] N-373-2 [T1]
N-207 [T5] N-249-13 [T5] N-318-3 [T5] N-376 [T3]
N-207-1 [T3] N-249-14 [T2] N-318-4 [T5] N-377 [T3]
N-208-13 N-252 [T4] N-318-5 [T1] N-378 [T3]
N-208-2 [T3] N-259 [T3] N-319 [T5] N-379 [T5]
N-212 [T3] N-260 [T5] N-319-1 [T5] N-379-1 [T3]
N-213 [T1] N-260-1 [T5] N-319-2 [T5] N-383 [T5]
N-214 [T5] N-260-2 [T4] N-319-3 [T1] N-383-1 [T4]
N-214-1 [T5] N-261 [T3] N-320 [T3] N-384-1 [T3]
N-214-2 [T3] N-262 [T3] N-321 [T5] N-387 [T3]
N-215 [T3] N-263 [T4] N-321-1 [T3] N-388 [T3]
N-217-1 [T3] N-265 [T5] N-324 [T3] N-391 [T5]
N-220 [T3] N-265-1 [T3] N-328 [T3] N-391-1 [T5]
N-223 [T3] N-267 [T3] N-329 [T1] N-391-2 [T1]
N-224 [T5] N-271 [T3] N-336 [T3] N-392 [T5]
N-224-1 [T3] N-272 [T3] N-337 [T5] N-392-1 [T5]
N-225 [T3] N-274 [T4] N-337-1 [T3] N-392-2 [T5]
N-226 [T3] N-275 [T4] N-339 [T3] N-392-3 [T1]
N-227 [T3] N-276 [T3] N-341 [T3] N-393 [T3]
N-228 [T3] N-277 [T3] N-342 [T3] N-394 [T3]
N-229 [T3] N-279 [T4] N-345 [T5] N-395 [T3]
N-231 [T3] N-280 [T3] N-345-1 [T3] N-397 [T4]
N-233 [T3] N-281 [T3] N-346 [T3] N-398 [T4]
N-237 [T5] N-282 [T3] N-347 [T3] N-403 [T3]
N-237-1 [T5] N-2843 N-348 [T4] N-404 [T4]
N-237-2 [T3] N-284-12 N-348-1 [T4] N-405-1 [T1]
N-238 [T4] N-292 [T2] N-348-2 [T4] N-410 [T3]
N-240 [T3] N-294 [T3] N-349 [T3] N-411 [T5]
N-241 [T3] N-295 [T3] N-350 [T4] N-411-1 [T4]
N-242 [T5] N-296 [T3] N-351 [T1] N-412 [T3]
N-242-1 [T4] N-298 [T3] N-352 [T5] N-413 [T3]
N-243 [T1] N-299 [T5] N-352-1 [T3] N-414 [T3]
N-245 [T3] N-299-1 [T3] N-353 [T3] N-418 [T5]
N-246 [T5] N-300 [T3] N-354-1 [T3] N-418-1 [T3]
N-246-1 [T5] N-302 [T3] N-355 [T3] N-420 [T3]
N-246-2 [T3] N-304 [T5] N-357 [T3] N-421 [T3]
N-247 [T3] N-304-1 [T5] N-359 [T3] N-430 [T4]
N-248 [T3] N-304-2 [T5] N-362 [T5] N-433 [T3]
N-249 [T5] N-304-3 [T5] N-362-1 [T5] N-438 [T5]
N-249-1 [T5] N-304-4 [T3] N-362-2 [T3] N-438-1 [T1]
N-249-2 [T5] N-309 [T5] N-367 [T3] N-438-2 [T5]
N-249-3 [T5] N-309-1 [T3] N-368 [T3] N-438-3 [T5]
N-249-4 [T5] N-310-1 [T4] N-369 [T1] N-438-4 [T3]
N-249-5 [T5] N-313 [T3] N-370 [T5] N-439 [T5]
N-249-6 [T5] N-314 [T4] N-370-1 [T5] N-439-1 [T3]
N-249-7 [T5] N-315 [T1] N-370-2 [T3] N-440 [T5]
N-249-8 [T5] N-316 [T3] N-371 [T5] N-440-1 [T3]
N-249-9 [T5] N-317 [T3] N-371-1 [T3] N-441 [T5]

Appendix C to RG 1.84, Rev. 33, Page C-2

N-441-1 [T5] N-5192 1141-7 [T3] 1583 [T3]
N-441-2 [T3] N-520 [T5] 1332-6 [T5] 1587 [T3]
N-442 [T3] N-520-1 [T1] 1335-9 [T5] 1590 [T3]
N-443 [T5] N-525 [T1] 1337-9 [T5] 1601 [T3]
N-443-1 [T5] N-5302 1337-10 [T5] 1602-1 [T3]
N-443-2 [T3] N-539 [T1] 1361-2 [T4] 1603 [T3]
N-451 [T3] N-540 [T3] 1395-3 [T5] 1605 [T3]
N-452 [T1] N-548 [T1] 1407-2 [T5] 1606 [T5]
N-453 [T5] N-549 [T3] 1412-4 [T4] 1606-1 [T4]
N-453-1 [T5] N-550 [T3] 1414-3 [T5] 1607 [T5]
N-453-2 [T5] N-551 [T3] 1414-4 [T5] 1607-1 [T4]
N-453-3 [T1] N-558 [T1] 1423-2 [T4] 1608-1 [T3]
N-454 [T5] N-559 [T3] 1434-1 [T3] 1613 [T3]
N-454-1 [T1] N-564 [T5] 1461-1 [T3] 1614 [T3]
N-455 [T5] N-564-1 [T5] 1470-2 [T3] 1615 [T3]
N-455-1 [T1] N-564-2 [T1] 1471-1 [T3] 1616 [T3]
N-459 [T3] N-5652 1475-1 [T3] 1618 [T5]
N-462 [T3] N-570 [T1] 1477-1 [T3] 1618-1 [T5]
N-464 [T1] N-572 [T1] 1484-1 [T5] 1622 [T3]
N-466 [T5] N-579 [T1] 1484-2 [T5] 1623 [T3]
N-466-1 [T3] N-580 [T5] 1492 [T5] 1625 [T3]
N-468 [T3] N-580-1 [T1] 1494-1 [T3] 1626 [T5]
N-469 [T5] N-594 [T1] 1506 [T3] 1633 [T3]
N-469-1 [T1] N-5952 1508 [T5] 1634 [T5]
N-470 [T3] N-595-12 1515 [T3] 1634-1 [T5]
N-474 [T5] N-595-22 1516-1 [T5] 1635-1 [T4]
N-474-1 [T5] N-595-32 1521-1 [T4] 1636-1 [T4]
N-474-2 [T3] N-596 [T1] 1528-3 [T4] 1637 [T3]
N-475 [T3] N-607 [T1] 1529 [T3] 1644 [T5]
N-476 [T3] N-608 [T3] 1531 [T3] 1644-1 [T5]
N-482 [T3] N-610 [T1] 1532 [T3] 1644-2 [T5]
N-483-22 N-611 [T1] 1533 [T3] 1644-3 [T5]
N-483-32 N-620 [T1] 1535-2 [T3] 1644-4 [T5]
N-484 [T5] N-621 [T1] 1536 [T3] 1644-5 [T5]
N-484-1 [T3] N-625 [T5] 1540-1 [T5] 1644-6 [T5]
N-492 [T5] N-625-1 [T1] 1541-1 [T5] 1645 [T3]
N-492-1 [T3] N-626 [T2] 1541-2 [T5] 1648 [T3]
N-493 [T1] N-631 [T1] 1552 [T5] 1649 [T3]
N-497 [T5] N-632 [T1] 1553 [T5] 1650 [T3]
N-497-1 [T3] N-635 [T1] 1553-1 [T3] 1651 [T3]
N-5003 N-636 [T1] 1555 [T5] 1657 [T3]
N-500-1 [T2] N-637 [T1] 1555-1 [T3] 1659 [T3]
N-501 [T3] N-642 [T1] 1557-2 [T5] 1661 [T3]
N-502 [T3] N-644 [T3] 1567 [T3] 1662 [T3]
N-505 [T1] N-6452 1568 [T3] 1664 [T3]
N-507 [T3] N-646 [T1] 1569 [T4] 1666 [T3]
N-510 [T5] N-650 [T1] 1573 [T3] 1672 [T3]
N-5102 N-655 [T2] 1574 [T3] 1675 [T3]
N-510-12 N-6562 1580-1 [T3] 1676 [T3]
N-511 [T1] N-657 [T1] 1581 [T3] 1678 [T3]

Appendix C to RG 1.84, Rev. 33, Page C-3

1682 [T5] 1819 [T3]
1682-1 [T3]
1683 [T5]
1683-1 [T3]
1684 [T3]
1685 [T3]
1686 [T3]
1689 [T5]
1689-1 [T4]
1690 [T3]
1691 [T3]
1695 [T5]
1701 [T5]
1702 [T5]
1703 [T3]
1706 [T3]
1713 [T3]
1714 [T5]
1718 [T3]
1719 [T3]
1720 [T5]
1720-1 [T5]
1722 [T5]
1728 [T3]
1740 [T3]
1741 [T5]
1741-1 [T3]
1742 [T3]
1743 [T3]
1755 [T5]
1759 [T5]
1760 [T3]
1761 [T5]
1765 [T3]
1766 [T3]
1767 [T3]
1768 [T3]
1769 [T5]
1769-1 [T3]
1773 [T3]
1774 [T5]
1775 [T3]
1777 [T3]
1780 [T5]
1783 [T5]
1783-1 [T4]
1787 [T3]
1798 [T3]
1808 [T3]
1810 [T3]

Appendix C to RG 1.84, Rev. 33, Page C-4