Regulatory Guide 1.84
| ML003740283 | |
| Person / Time | |
|---|---|
| Issue date: | 05/31/1999 |
| From: | Office of Nuclear Regulatory Research |
| To: | |
| References | |
| RG-1.84, Rev 31 | |
| Download: ML003740283 (20) | |
A. INTRODUCTION
Section 50.55a, "Codes and Standards," of 10 CFR
Part 50, "Domestic Licensing of Production and Uti lization Facilities," requires, in part, that components of the reactor coolant pressure boundary be designed, fabricated, erected, and tested in accordance with the requirements for Class 1 components of Section III,
"Nuclear Power Plant Components,"' of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code or equivalent quality standards.
Footnote 6 to 10 CFR 50.55a states that the use of spe S>cific Code Cases may be authorized by the Commission upon request pursuant to 10 CFR 50.55a(a)(3), which requires that proposed alternatives to the described re quirements or portions thereof provide an acceptable level of quality and safety.
General Design Criterion 1, "Quality Standards and Records," of Appendix A, "General Design Crite ria for Nuclear Power Plants," to 10 CFR Part 50 re quires, in part, that structures, systems, and compo nents important to safety be designed, fabricated, erected, and tested to quality standards commensurate with the importance of the safety function to be per
1Copies may be obtained from the American Society of Mechanical Engi neers, Three Park Avenue, New York, New York 10016-599
0. Phone
(212)591-8500; fax (212)591-8501.
Revision 31 May 1999 JIDE
formed. Where generally recognized codes and stan dards are used, Criterion 1 requires that they be identi fied 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 the same appendix requires, in part, that components that are part of the reactor coolant pressure boundary be designed, fabricated, erected, and tested to the highest quality standards practical.
Appendix B, "Quality Assurance Criteria for Nu clear Power Plants and Fuel Reprocessing Plants," to
10 CFR Part 50 requires, in part, that measures be es tablished for the control of special processing of materi als and that proper testing be performed.
This regulatory guide lists those Section III ASME
Code Cases oriented to design and fabrication that are generally acceptable to the NRC staff for implementa tion in the licensing of light-water-cooled nuclear power plants. The guide is being revised to update the NRC's position on new Code Cases, revised Code Cases, and annulled Code Cases since Revision 30 of the guide was issued in October 1994.
This regulatory guide contains no information collection activities and, therefore, is not subject to the USNRC REGULATORY GUIDES
The guides are issued in the following ten broad divisions:
Regulatory Guides are issued to describe and make available to the public such informa tion as methods acceptable to the NRC staff for implementing specific parts of the Corn-
1. Power Reactors
6. Products mission'sregulations, techniquesusedbythestaffinevaluatingspecificproblemsorpos.
2. Research and Test Reactors
7. Transportation tulated accidents, and data needed by the NRC staff in its review of applications for per-
3. Fuels and Materials Facilities
8. Occupational Health mits and licenses. Regulatory guidesare notsubstitutesforregulations, and compliance
4. Environmental and Siting
9. Antitrust and Financial Review withthemisnotrequired. Methodsand solutionsdifferentfromthosesetoutintheguides
5. Materials and Plant Protection
10.
General will be acceptable if they provide a basis for the findings requisite to the issuance or con tinuance of a permit or license by the Commission.
Single copies of regulatory guides may be obtained freeofcharge by writing to the Repro This guide was issued after consideration of comments received from the public. Coin- duction and Distribution Services Section, Office of the Chief Information Officer, U.S. Nu ments and suggestions for improvementsinthese guidesare encouraged at all times, and clear Regulatory Commission, Washington, DC 20555-0001; or by fax to (301)415-2289;
guides will be revised, as appropriate, to accommodate comments and to reflect new in- or by email to DISTRIBUTION@NRC.GOV.
formation or experience.
Issued guides may also be purchased from the National Technical Information Service on Written comments may be submitted to the Rules and Directives Branch, ADM, U.S. Nu- a standing order basis. Details on this service may be obtained by writing NTIS, 5285 Port clear Regulatory Commission, Washington, DC 20555-CO01.
Royal Road, Springfield, VA 22161.
U.S. NUCLEAR REGULATORY COMMISSION
REGULATORY GL
OFFICE OF NUCLEAR REGULATORY RESEARCH
REGULATORY GUIDE 1.84 (Draft was issued as DG-1048)
DESIGN AND FABRICATION CODE CASE ACCEPTABILITY,
ASME SECTION III, DIVISION 1
requirements of the Paperwork Reduction Act of 1980
(44 U.S.C. 3501 et seq.).
B. DISCUSSION
The ASME Boiler and Pressure Vessel Committee publishes a document entitled "Code Cases."1 Gener ally, the individual Code Cases that make up this docu ment explain the intent of Code rules or provide for al ternative requirements under special circumstances.
Most Code Cases are eventually superseded by re vision to the Code and then are annulled by action of the ASME. In such cases, the intent of the annulled Code Case becomes part of the revised Code, and therefore continued use of the Code Case intent is sanctioned un der the rules of the Code. In other cases, the Code Case is annulled because it is no longer acceptable or there is no further requirement for it. A Code Case that was ap proved for a particular situation and not for a generic application should be used only for construction of the approved situation because annulment of such a Code Case could result in construction that would not meet Code requirements.
The Code Cases listed in this guide are limited to those cases applicable to Section III that are oriented to ward design and fabrication.
All published Code Cases in the area of design and fabrication that are applicable to Section III of the Code and were in effect on May 12, 1994, were reviewed for inclusion in this guide. In addition to the listing of ac ceptable Code Cases, this revision of the guide includes listings of (1) Code Cases that were identified as ac ceptable in a prior version of this regulatory guide and that were annulled after the original issuance of this guide (June 1974) and (2) Code Cases that were identi fied as acceptable in a prior version of this regulatory guide and that were superseded by revised Code Cases after the original issuance of this guide (June 1974).
Code Cases that are not listed herein are either not en dorsed or will require supplementary provisions on an individual basis to attain endorsement status.
The endorsement of a Code Case by this guide constitutes acceptance of its technical position for ap plications not precluded by regulatory or other require ments or by the recommendations in this or other regu latory guides. Contingent endorsement is indicated in Regulatory Position 1.c for specific cases. However, it is the responsibility of the user to make certain that no regulatory requirements are violated and that there are
- Lines indicate substantive changes from Revision 30.
no conflicts with other recommended limitations re sulting from Code Case usage.
Acceptance or endorsement by the NRC staff ap plies only to those Code Cases or Code Case revisions with the date of ASME approval as shown in the Regu latory Position of this guide. Earlier or later revisions of a Code Case are not endorsed by this guide. New Code Cases will require evaluation by the NRC staff to deter mine whether they qualify for inclusion in the approved list. Because of the continuing change in the status of Code Cases, it is planned that this guide will require pe riodic updating to accommodate new Code Cases and any revisions of existing Code Cases.
C. REGULATORY POSITION
1. ACCEPTABLE CODE CASES
The Section III ASME Code Cases 2 listed below (by number, date of ASME approval, and title) are ac ceptable to the NRC staff for application in the construction of components for light-water-cooled nu clear power plants. Their use is acceptable within the li mitations stated in the "Inquiry" and "Reply" sections of each individual Code Case, within the limitations of such NRC or other requirements as may exist, and with in the additional limitations recommended by the NRC
staff given with the individual Code Case in the listing.
The categorization of Code Cases used in this guide is intended to facilitate the Code Case listing and is not in tended to indicate a limitation on its usage.
a. Design-Oriented Code Cases (Code Case Number, Date of ASME Approval, 3 and Title):
(1) Code Cases Applicable to Piping Design:
N-122-2 04-28-94 Procedure for Evaluation of the Design of Rectangular Cross Section Attachments on Class
1 Piping,Section III, Divi sion 1 N-160-1
07-18-85 Finned Tubing for Construc
07-18-88 tion,Section III, Division 1
03-14-91
03-14-94 N-453-2 04-30-92 Nickel-Chromium-Molybde num-Copper Stainless Steel (UNS N08925 and N08926)
Seamless and Welded Pipe for Class 2 and 3 Construction,Section III, Division 1
2A numerical listing of the Code Cases appears in the appendix.
3When more than one date is given, the earlier date is that on which the Code Case was approved by the ASME and the later date(s) is that on which the Code Case was reaffirmed by the ASME.
1.84-2
N-454-1 04-30-92 Nickel-Chromium-Molybde num-Copper Stainless Steel (UNS N08925 and N08926)
Wrought Fittings for Class 2 and 3 Construction Section III,
Division 1 N-455-1
04-30-92 Nickel-Chromium-Molybde num-Copper Stainless Steel (UNS N08925 and N08926)
Forged Flanges and Fittings for Class 2 and 3 Construction,Section III, Division 1
(2) Code Cases Applicable to Valve Design:
N-133-3 07-18-85 Use of SB-148 Alloys 952 and
07-18-88
954,Section III, Division 1,
03-14-91 Class 3
03-14-94 N-313
05-11-81
11-28-83
11-28-86
11-28-89
11-28-92 N-394
02-20-84
07-30-86
07-30-89
07-27-92 N-410
12-05-84
07-27-88
03-14-91
03-14-94 Alternate Rules for Half Coupling Branch Connections,Section III, Division 1 Restricting Lift to Achieve Reduced Relieving Capacities of Full Lift, Nozzle Type, and Flat Seated Safety and Safety Relief Valves for Compressible Fluid Applications,Section III,
Division 1, Classes 2 and 3 Certified Relieving Capacities of Pressure Relief Valves Having Set Pressure of 3 psig up to but Not Including 15 psig Installed for Overpressure Protection of Compressible Fluid Systems, Section Ili, Di vision 1, Classes 2 and 3 N-309-1
12-05-85 Identification of Materials for
07-27-88 Component Supports, Section
03-14-91 III, Division 1 N-411-1
02-20-86
02-20-89
04-30-92 Alternative Damping Values for Response Spectra Analysis of Classes 1, 2, and 3 Piping,Section III, Division 1 Code Case N-411-1 is acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: (1) The Code Case damping should be used completely and consistently, if used at all. (For equipment other than piping, the damping val ues specified in Regulatory Guide 1.61, "Damping Val ues 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 accep tance-Reference NUREG/CR-3526). (3) When used for reconciliation work or for support optimization of existing designs, the effects of increased motion on ex isting clearances and on line mounted equipment should be checked. (4) This Code Case is not appropri-.
ate for analyzing the dynamic response of piping sys tems 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 re viewed by the NRC staff.
N-420
02-14-85
02-14-88
03-14-91
03-14-94 N-433
12-16-86
12-16-89
12-16-92
(3) Other Code Cases Related to Design:
N-122-2
04-28-94 N-243
08-30-79
07-16-82
05-19-85
05-19-88
03-14-91
03-14-94 Procedure for Evaluation of the Design of Rectangular Cross Section Attachments on Class
1 Piping,Section III, Divi sion 1 Boundaries Within Castings Used for Core Support Struc tures,Section III, Division 1, Class CS
Linear Energy Absorbing Sup ports for Subsection NF,
Classes 1, 2, and 3 Construc tion,Section III, Division 1 Non-Threaded Fasteners for Section III, Division 1, Class 1, 2, and 3 Component and Piping Supports,Section III, Division 1 N-476
05-06-89 Class 1, 2, 3, and MC Linear
07-27-92 Component Supports-Design Criteria for Single Angle Mem bers,Section III, Division 1, Subsection NF
N-505
07-27-92 Alternative Rules for the Ex amination of Butt Welds Used as Closure Welds for Electrical Penetration Assemblies in Con tainment Structures,Section III, Division 1
1.84-3
_________________________________________
.1 N-511
02-12-93 Design Temperature for Atmo spheric and 0-15 PSI Storage Tanks,Section III, Division 1 N-520
12-09-93 Alternative Rules for Renewal of N-type Certificates for Plants Not in Active Construc tion,Section III, Division 1 b. Fabrication-oriented Code Cases
(1) Code Cases Related to Welding and Brazing:
N-154-1
12-05-85
12-05-88
02-05-92 N-304-4 02-23-87
12-11-89
02-12-93 N-315
02-14-83
02-19-86
02-19-89
02-05-92 Projection Resistance Welding of Valve Seats,Section III,
Division 1, Class 1, 2, and 3 Valves Use of 20Cr-25Ni-6Mo (Alloy UNS N08366) Plate, Sheet, Strip and Welded Pipe, Class 2 and 3 Section III, Division 1 Repair of Bellows,Section III,
Division 1 Code Case N-315 is acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: Prior to repair the user will quali fy the repair procedures on a full-scale mockup bellow to ensure that the repair meets all design requirements for bellows.
N-345-1
12-13-82
06-30-88
03-14-91
03-14-94 Attachment of AMS 5382 Alloy 31 Seat Rings by Fric tion Welding,Section III,
Division 1, Classes 1, 2, and 3 N-391-1
07-24-89 Procedure for Evaluation of the
07-27-92 Design of Hollow Circular Cross Section Welded Attach ments on Class 1 Piping, Sec tion III, Division 1 Code Case N-391-1 is acceptable subject to the fol lowing conditions in addition to those specified in the Code Case: The following typographical errors need to be corrected:
1. In equation (3) the + sign should be changed to an = sign.
2. In equation (4) the first + sign should be changed to an = sign.
N-392-2
12-11-92 N-393
11-28-83
07-30-86
07-30-89
07-27-92 N-395
12-11-89
12-11-92 N-452
03-08-89
04-30-92 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attach ments on Classes 2 and 3 Pip ing,Section III, Division 1 Repair Welding Structural Steel Rolled Shapes and Plates for Component Supports,Section III, Division 1 Laser Welding,Section III,
Division 1 Specialized Subcontracted Welding Process (Electron Beam Welding),Section III,
Division 1 N-464
03-08-89 Laser Welding of Lap-Joints,
04-30-92 Section III, Division 1, Class 2 and 3 Construction
(2)
N-240
Other Code
03-19-79
01-21-82
09-17-84
09-17-87
08-14-90
08-14-93 N-241
07-09-79
01-21-82
09-17-84
09-17-87
12-11-89
12-11-92 N-368
07-06-83
06-30-87
08-14-90
08-14-93 N-369
02-14-83
02-19-86
02-19-89
02-05-92 Cases Related to Fabrication Hydrostatic Testing of Open Ended Piping,Section III,
Division 1 Hydrostatic Testing of Piping,Section III, Division 1 Pressure Testing of Pump Discharge,Section III,
Division 1, Classes 2 and 3 Resistance Welding of Bellows,Section III, Divi sion 1 c.
Code Cases with Contingent Approval N-62-7
05-11-94 Internal and External Valve Items,Section III, Division 1, Class 1, 2, and 3 Code Case N-62-7 is acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: The Code requires that Class 1 and Class 2 valve manufacturers meet the provisions of NCA 4000, "Quality Assurance," and, in addition, Class 3 valve manufacturers should also meet the pro visions of NCA 4000.
1.84-4
1 11 J ,
1792-2
01-08-79 Fiberglass Reinforced Thermo (N-155-2) 01-21-82 setting Resin Pipe,Section III,
01-21-85 Division 1
01-21-88
03-14-91
03-14-94 Code Case 1792-2 (N-155-2) is acceptable subject to the following condition in addition to those condi tions specified in the Code Case: The applicant should satisfy the additional limitations that are specified in Regulatory Guide 1.72, "Spray Pond Piping Made from Fiberglass-Reinforced Thermosetting Resin."
N-192-2 09-16-81
09-17-84
09-17-87
08-14-90
08-14-93 N-284
08-25-80
05-25-83
07-30-86
07-30-89
07-27-92 Use of Braided Flexible Con nectors,Section III, Division 1, Class 2 and 3 Metal Containment Shell Buckling Design Methods,Section III, Division 1, Class MC
Code Case N-284 is acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: If axisymmetric techniques are employed in the analysis of vessels with large open ings, the applicability of the methodology in these ap plications should be demonstrated.
2. ANNULLED CODE CASES
Code Cases that were endorsed by the NRC in a prior version of this guide and were later annulled by action of the ASME should be considered as deleted from the list of acceptable Code Cases as of the date of the ASME action that approved the annulment. Such Code Cases, which were annulled on or after July 1,
1974, are listed below by number, effective dates, 4 and title. 5
1361-2
03-09-72 Socket Welds,Section III
03-01-79 Code Case 1361-2 was acceptable when used in connection with Section III, paragraph NB-3356, Fillet Welds.
1461-16
03-09-72 Electron Beam Welding, Sec
02-16-77 tion I, III, and VIII, Division 1 and 2
1470-27
12-18-72 External Pressure Charts for
11-04-74 High-Strength Carbon Steels and for Low-Alloy Steels, Sec tion VIII, Division 1 and 2, and Section III
1471-1
03-09-72 Vacuum Electron Beam Weld
01-01-78 ing of Tube Sheet Joints, Sec tion III
1477-1
03-09-72
01-01-78
1494-1
03-03-73
01-01-78 Use of 1970 Addenda of ANSI
B31.7,Section III
Weld Procedure Qualification Test,Section III
Depositing Weld Metal Prior to Preparing Ends for Welding,Section III, Division 1, Class 1,
2, and 3 Construction Code Case N-292 is acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: Class 3 piping that is longitudi nally welded and that has a weld efficiency factor of 1.0
as selected from Table ND-3613.4-1 should receive a
100 percent volumetric examination (RT or UT) of the deposited weld metal in accordance with the require ments of ND-5000.
N-318-5 04-28-94 Procedure for Evaluation of the Design of Rectangular Cross Section Attachments on Class 2 or 3 Piping,Section III, Divi sion 1
1506
12-13-71 Stress Intensification Factors,
01-01-78 Section III, Class 2 and 3 Piping
1516-2
08-11-75 Welding of Seats or Minor In (N-24)
07-01-78 ternal Permanent Attachments in Valves for Section III Ap plications
4Earlier date-date Code Case was approved by ASME; later date-date Code Case was annulled. Where more than two dates appear, the last date is the date that the Code Case was annulled. The middle date (or dates)
was the date of reaffirmation of the Code Case.
5Code Cases 1355-3, 1534, and 1554, which were listed in the original issue of the guide, were annulled by ASME action prior to July 1,1974.
6Code Case 1461-1 is no longer listed as a Section III Code Case and is therefore deleted from the acceptable listing.
7The annulment of Code Case 1470-2 was effective upon ASME ap proval of Code Case 1630. However, because of an oversight, the annul ment was not noted until publication of Supplement No. 13 to the 1974 Code Cases.
1.84-5 N-292
01-05-81
11-28-83
07-30-86
07-30-89
07-27-92
1516-2 (N-24)
11-20-788
01-01-80
Welding of Seats or Minor In ternal Permanent Attachments in Valves for Section III Ap plications
15339
06-14-72 Pressure Temperature Ratings
07-01-75 of SA-351 Grades CF8A, CF3, and CF3M,Section III
1535-2
04-30-73 Hydrostatic Testing of Section
03-21-77 III, Class 1 Valves
1536
08-14-72 Closing Seam for Electrical
07-01-77 Penetrations for Section III,
Class 2, 3, and MC
1539-1 (N-30-1)
11-21-77 Metal Bellows and Metal Dia
01-01-81 phragmr Stem Sealed Valves,Section III, Division 1, Classes
1, 2, and 3 N-31-1
07-18-85
07-18-88
03-14-91
07-01-93 Elastomer Diaphragm Valves,Section III, Class 2 and 3 Code Case N-31-1 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: Each applicant who applies the Code Case should indicate in the referencing Safety Analysis Report that the service life of the elastomer di aphragm should not exceed the manufacturer's recom mended service life. This recommended service life should not exceed 1/3 of the minimum cycle life as es tablished 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 com bined service and storage life of the elastomer dia phragm should not exceed 10 years.
1541-3
05-15-78 Hydrostatic Testing of Em (N-32-3) 07-01-79 bedded Class 2 and Class 3 Piping for Section III, Division
1 Construction
8This revision of the Code Case was originally approved by the ASMEon
8-11-75 and was annulled on 7-1-78 because of the publication of revi sions to Section III in the Winter 1977 Addenda. However, the users did not believe that the Code Case was covered in the Code revision; there fore, ASME reaffirmed the Case on 11-20-78. Because of these circum stances and because there were no changes in the Code Case, the NRC
considers that this Case was in effect during the period 7-1-78 through
11-20-78.
9Code Case was annulled on date as indicated, but the annulment was first indicated in Revision 12 to this guide.
N-32-4
03-16-81 Hydrostatic Testing of Em
03-16-84 bedded Class 2 and 3 Piping for Section III, Division 1 Construction Code Case N-32-4 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case:
The acceptance was based on the following clarifi cation and interpretation. Code Case N-32-4 does not replace paragraph NC/ND 6129, "Provisions for Em bedded or Inaccessible Welded Joints in Piping," of the Code. The intent of the Code Case is to (1) provide additional testing above Code requirement and (2) per mit 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 unneces sary to include in the Code Case. Paragraph (2) is a vari ation in the volumetric examination technique and was acceptable as written. Paragraph (3) contains an addi tional requirement and is not a relaxation of the Code. It was, therefore, acceptable but unnecessary to include in the Code Case.
1552-1 (N-35-1)
1553-19
08-29-77
07-01-79
03-03-75
01-01-76
1555-1
01-14-77
01-01-78
1569
03-03-7510
07-01-79 Design by Analysis of Section III, Class 1 Valves Upset Heading and Roll Threading of SA-453 for Bolt ing in Section III
Certification of Safety Relief Valves,Section III, Division 1 Design of Piping for Pressure Relief Valve Station,Section III
Code Case 1569 was acceptable subject to com pliance with the recommendations contained in Regu latory Guide 1.67, "Installation of Over-pressure Protection Devices."
1573
04-30-73 Vacuum Relief Valves, Section
01-01-78 III
1574
04-30-73 Hydrostatic Test Pressure for
12-31-74 Safety Relief Valves,Section III
1580-1
11-05-73 Buttwelded Alignment Toler
01-01-78 ance and Acceptable Slopes for Concentric Centerlines for Sec tion III, Class 1, 2, and 3 Construction
'0Corrected date.
1.84-6
1581
06-25-73 Power-Operated Pressure Re
03-01-79 lief Valves,Section III
1588 S(N-46)
08-13-73
03-19-79
03-19-82
1630-1
07-10-78 (N-66-1) 07-10-81 Electro-Etching of Section III
Code Symbols
1601
11-05-73 Limits of Reinforcement for
07-01-74 Two-Thirds Area,Section III,
Class 1
1606-1
12-16-74 Stress Criteria Section III,
07-01-77 Classes 2 and 3 Piping Subject to Upset, Emergency, and Faulted Operating Conditions Code Case 1606-1 was acceptable subject to the in terpretation that the stress limit designations of "Up set," "Emergency," and "Faulted" do not necessarily imply agreement with specified plant conditions appli cable to ASME Code Class 2 and 3 components for fluid systems. These designations should be estab lished and justified in the design specifications.
1607-1
11-04-74 Stress Criteria for Section III,
07-01-77 Classes 2 and 3 Vessels De signed to NC/ND-3300 Ex cluding the NC-3200 Alternate Code Case 1607-1 was acceptable subject to the in terpretation that the stress limit designations of "Up set," "Emergency," and "Faulted" do not necessarily imply agreement with specified plant conditions appli cable to ASME Code Class 2 and 3 components for fluid systems. These designations should be estab lished and justified in the design specifications.
N-55-1
(1609)
04-05-84 Inertia and Continuous Drive
04-05-87 Friction Welding,Section III,
Division 1
1614
12-17-7310
01-01-79
1620
(N-61)
03-02-74
01-08-79
01-08-82 Hydrostatic Testing of Piping Prior To or Following the Installation of Spray Nozzles for Section III, Classes 1, 2, and 3 Piping Systems Stress Category for Partial Pen etration Welded Penetrations,Section III, Class 1 Construc tion
1623
03-02-74 Design by Analysis for Section
03-01-79 III, Class 1 Sleeve-Coupled and Other Patented Piping Joints
1630-1 (N-66-1)
12-11-8111
12-05-84
12-05-87 External Pressure Charts for High Yield Strength Carbon Steels and Low Alloy Steels.
(Yield Strength above 38 Ksi to
60 Ksi Inclusive.) For Section III, Class 1, 2, 3, and MC
External Pressure Charts for High Yield Strength Carbon Steels and Low Alloy Steels.
(Yield Strength above 38 Ksi to
60 Ksi Inclusive.)Section III,
Division 1, Class 1, 2, 3, and MC 1633
04-29-74 Brazing of Seats to Class 1, 2,
01-01-78 and 3 Valve Body or Bonnets,Section III
1635-112 08-12-74 Stress Criteria for Section III,
07-01-77 Class 2 and 3 Valves Subjected to Upset, Emergency, and Faulted Operating Conditions Code Case 1635-1 was acceptable subject to the in terpretation that the stress limit designations of "Up set," "Emergency," and "Faulted" do not necessarily imply agreement with specified plant conditions appli cable to ASME Code Class 2 and 3 components for fluid systems. These designations should be estab lished and justified in the design specifications.
1636-112 08-12-74 Stress Criteria for Section III,
07-01-77 Class 2 and 3 Pumps Subjected to Upset, Emergency, and Faulted Operating Conditions Code Case 1636-1 was acceptable subject to the in terpretation that the stress limit designations of "Up set," "Emergency," and "Faulted" do not necessarily imply agreement with specified plant conditions appli cable to ASME Code Class 2 and 3 components for fluid systems. These designations should be estab lished and justified in the design specifications.
1651
08-12-74 Interim Requirements for Cer
03-01-79 tification of Component Sup ports,Section III, Subsection NF
lIThe Code Case was annulled on July 10, 1981 (ASME mandatory an nulment date). It was reinstated on December 11, 1981. Because of the circumstances and because there were no changes in the Code Case, the NRC considers that this Case was in effect during the period of 7-10-81 through 12-11-81.
12Code Cases 1635 and 1636 were approved by ASME on July 1, 1974, and revised on August 12, 1974. Because Code Cases 1635 and 1636 were not in effect on September 1, 1974, they are not included in this guide.
1.84-7
1657
11-04-74 Stress Criteria for Class 2 and
07-01-77
3 Atmospheric and Low Pres sure (0-15 psig) Steel Storage Tanks
1659
11-04-74 Interconnection of Two Piping
07-01-77 Systems for Section III, Class
1, 2, and 3 Construction
1660
(N-77)
11-04-74 Overpressure Protection Under
03-01-79 Emergency Operating Condi tions for Section III, Class 1
1661
11-04-74 Postweld Heat Treatment
01-01-78 P-No.1 Materials for Section III, Class 1 Vessels
1662
11-04-74 Shop Assembly of Compo
01-01-78 nents, Appurtenances and Pip ing Subassemblies for Section III, Class 1, 2, 3 and MC
Construction
1665 (N-81)
11-04-74 Pressure-Temperature Ratings
07-01-78 for Class 1 Valves Made from
5 Cr-1/2 Mo,Section III
1672
11-04-74 Nuclear Valves for Section III,
03-21-77 Division 1, Class 1, 2, 3 Construction
1675
12-16-74 Tubesheet to Shell or Formed
07-01-76 Head Weld Joints,Section III,
Class 1 Vessels
16769
12-16-74 Clarification of Stress Intensi
07-01-76 ties in Curved Pipe or Welded Elbows,Section III
1677 (N-82)
12-16-74 Clarification of Flange Design
03-01-79 Loads,Section III, Class 1, 2, and 3
1678
12-16-74
01-08-79
01-01-80
Butterfly Valves of Circular Cross Section Larger than 24 in. NPS for Section III, Class 2 and 3 Construction
1685
04-28-75 Furnace Brazing Section III,
01-01-78 Class 1, 2, 3 and MC Construc tion
1686
03-03-75 Furnace Brazing,Section III,
01-01-78 Subsection NF, Component Supports
1689-1
09-10-76 Alternate PWHT Time and
01-01-78 Temperature for SA-182 Grade F-22, SA-387 Grade 22, Class
2, and SA-335 Grade P-22 Sec tion III, Class 1, 2, 3 and CS
Code Case 1689-1 was acceptable subject to the following condition in addition to that specified in the Code Case: The alternate postweld heat treatment should be prequalified along with the applicable weld ing procedure in accordance with ASME Section IX.
1692 (N-90)
1695-1
1700
(N-94)
04-28-75
07-01-78
11-03-75
01-01-78
11-03-75
03-19-79
03-19-82
1701-2
07-09-79 (N-95-2) 07-09-82
1702-1
07-11-77 (N-96-1) 01-01-80
Rules for Design of Welded Class 1 Pumps Brazing,Section III, Division
1, Class 3 Determination of Capacities of Liquid Relief Valves,Section III, Division 1, Class 1, 2, and 3 Determination of Capacities of Vacuum Relief Valves,Section III, Division 1, Classes 2, 3, and MC and Division 2 Con crete Containments Flanged Valves Larger than 24 inches for Section III, Division
1, Class 1, 2, and 3 Construc tion
1703
06-30-75 Brazing of Copper Alloys, Sec
01-01-78 tion III, Class 2
1706
06-30-75 Data Report Forms for Compo
12-31-75 nent Supports,Section III,
Class 1, 2 and 3
1681-113 03-03-75 Organizations Accepting Over (N-84)
03-01-79 all Responsibility for Section III Construction
1683-1
03-01-76 Bolt Holes for Section III,
07-01-76 Class 1, 2, 3 and MC Compo nent Supports
13Code Case 1681 was approved by ASME on 12-16-74 and revised on
3-3-75. Because Code Case 1681 was not in effect on March 31, 1975, the Code Case was not included in this guide.
1711 (N-100)
11-03-75
01-08-79
01-21-82
01-01-83 Pressure Relief Valve Design Rules,Section III, Division 1, Class 1, 2 and 3 Code Case 1711 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case. The following information should be provided in the Safety Analysis Report:
(1) If stress limits are used in excess of those speci fied for the upset operating condition, it should
1.84-8
be demonstrated how the pressure relief func tion is ensured. Refer to paragraph 3.1,Section I, of the Case for Class 1 and paragraph 3.2,Section II, of the Case for Class 2 and 3 pres sure relief valves.
(2) If Case 1660 is to be used in conjunction with this Case, it should be stated that the stress lim its of Case 1660 supersede those of paragraph
3.2(b),Section I, of Case 1711. Functional as surance of (1) above is required in all situa tions.
1712 (N-101)
08-11-75 Nameplates and Stamping for
03-01-79 Section III, Division 1, Class 1,
2, 3 and MC Construction as Referenced in NA-8300
17189
08-11-75 Design of Structural Connec
07-01-76 tions for Linear Type Compo nent Supports,Section III, Di vision 1, Class 1, 2 and 3 and MC
17199
08-11-75 Single-Welded, Full
07-01-76 Penetration Sidewall Butt Joints in Atmospheric Storage Tanks,Section III, Division 1, Class 2
1720-2 (N-106-2)
11-20-78
08-28-81
09-17-84
09-17-87
08-14-90
08-14-93 Weld End Preparation for Sec tion III, Division 1 Construc tion Code Case 1720-2 (N-106-2) was acceptable sub ject to the following condition in addition to those con ditions specified in the Code Case: The acceptance of weld end preparations other than those shown in Fig ures 1, 2, and 3 of the Code Case should be evaluated on a case-by-case basis.
1726 (N-109)
1727 (N-l10)
11-03-75 Refinement of Low Alloy Steel
03-01-79 Heat Affected Zone Under Overlay Cladding,Section III,
Division 1, Class 1 Compo nents
12-22-75 Alternate Test Fluids, Section
01-01-79 III, Division 1 Code Case 1727 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: The applicant should provide justification in the referencing Safety Analysis Report for the fluid selected for use in the pressure test. The in formation provided should demonstrate that the fluid selected will not have deleterious effects on the mate rial 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.
1729 (N-Ill)
1732 (N-114)
1733 (N-115)
1734 (N-116)
11-03-75 Minimum Edge Distance-Bolt
03-01-79 ing for Section III, Division 1, Class 1, 2, and 3 and MC
Construction of Component Supports
11-03-75 Hardsurfaced Valves with Inlet
01-01-79 Connections less than 2-in.
Nominal Pipe Size for Section III, Division 1, Class 1 and 2 Construction
11-03-75 Evaluation of Safe Shut Down
01-01-78 Earthquake Loadings for Sec tion III, Division 1, Class MC
Containment Vessels
11-03-75 Weld Design for Use for Sec
01-01-78 tion III, Division 1, Class 1, 2,
3 and MC Construction of Component Supports Code Case 1734 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: If the configuration of Figure 1 of the Code Case is used for Class 1 and MC component supports, full penetration welds should be used. The ap plication of the configuration shown in Figures 2 and 3 should be restricted to the welding of cans for spring en capsulation 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 end 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.
1739-4
11-17-80
Pump Internal Items, Section (N-119-4) 12-01-8314 11I, Division 1, Class 1, 2, and 3 N-119-6 09-05-85 Pump Internal Items, Section
07-27-88 III, Division 1, Class 1, 2 and 3
03-14-91
03-14-94
14TheCode Case was annulled on December 1, 1983 (ASME mandatory annulment date). It was reinstated on February 20, 1984. Because of the circumstances and because there were no changes in the Code Case, the NRC considers that this Case was in effect during the period of 12-1-83 through 2-20-84.
1.84-9
1744 (N-121)
03-01-76 Carbon Steel Pipe Flanges
03-01-79 Larger than 24 in.,Section III,
Division 1, Class 2 and 3 Construction
1765
04-26-76 Machining After Hydrostatic
07-01-77 Testing Class 2 and 3 Con struction,Section III,
Division 1
1768
06-29-76 Permanent Attachments to
01-01-78 Containment Vessels-Class MC,Section III, Division 1
1769-1
02-16-77 Qualification of NDE Level III
10-01-77 Personnel,Section III,
Division 1
1774-1
07-11-77 (N-142-1) 01-01-80
Minimum Wall Thickness for Class 2 and 3 Valves,Section III, Division 1
1775
08-13-76 Data Report Forms for Core
08-13-79 Support Structures, Class CS,
Section III, Division 1
1780-1
07-10-7810 Hydrostatic Testing and Stamp (N-146-1) 12-11-81 ing of Components,Section III,
01-01-82 Division 1, Construction Code Case 1780-1 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: On a generic basis, the ap plication 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 applica tion 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 load ings be simulated in the hydrostatic testing.
1783-1
01-14-77 Qualification of Nondestructive
01-01-79 Examination Personnel, Sec tion III, Division 1 Code Case 1783-1 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: The first sentence of paragraph
(1) should be replaced with the following: "The certifi cation of the Level III nondestructive examination per sonnel for the purpose of this Section of the Code shall be the responsibility of the employer of the Level III in dividual. If the employer is not a Certificate Holder, then the verification of such certificate is the responsi bility of the Certificate Holder."
1791 (N-154)
1796 (N-159)
01-14-77 Projection Resistance Welding
01-14-80 of Valve Seats,Section III, Di vision 1, Class 1, 2 and 3 Valves
01-14-77 Body Neck Thickness Deter
07-01-78 mination for Valves with Inlet Connections 4-Inch Nominal Pipe Size and Smaller,Section III, Division 1, Class 1, 2, and 3
1808
02-16-77 F-Number Classification of
01-01-78 Low Alloy and Carbon Steel Bare Rod Electrodes, Sections I, II, III, IV, V, VIII, and IX
1812, (N-174)
1818 (N-175)
03-23-77
01-07-80
01-01-81 Size of Fillet Welds for Socket Welding of Piping,Section III,
Division 1
03-23-77 Welded Joints in Component
07-01-79 Standard Supports,Section III,
Division 1 Code Case 1818 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: That portion of the unwelded housing that is limited to 90 0 maximum should include a minimum of two sectors that are uniform in length.
N-179
07-11-77 Openings in Valves for Section
07-11-80
III, Division 1, Class 1, 2 and 3 Construction N-182
07-11-77 Alternate Rules for Procedure
07-01-81 Qualification Base Material Orientation,Section III, Divi sion 1, Class 2 and 3 Construc tion N-184
07-11-77 Roll Threading of SA-453
07-01-79 Bolting for Section III, Divi sion 1, Class 1, 2, 3 or CS
Construction N-189
08-29-77 Primary Membrane Plus Pri
07-01-79 mary Bending Stress Intensity Limits for Other Than Solid Rectangular Sections for Sec tion III, Division 1, Class MC
Construction N-193
11-21-77 Use of SB-61 and SB-62
11-21-80
Bronze for Section III, Divi sion 1, Class 3 Flange and Socket Weld End Valves
1.84-10
d
N-196-1 01-08-79 Exemption from the Shake
01-21-82 down Requirements When
01-21-85 Plastic Analysis is Performed
01-21-88 for Section III, Division 1,
12-03-90 Class 1 and CS Construction
07-01-92 N-199
03-20-78 Intervening Elements, Section
01-01-81 III, Division 1, Classes 1, 2, 3 and MC Component Construc tion Code Case N-199 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: The applicant should provide in formation 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-228
03-19-79 Alternate Rules for Sequence
03-19-82 of Completion of Code Data Report Forms and Stamping for Section III, Class 1, 2, 3 and MC Construction N-229
01-08-79
01-21-82
01-21-85
01-21-88 N-233
01-08-79
01-21-82
09-17-84
09-17-87 N-237-2 05-25-83
07-30-86
12-07-87
07-01-88 Alternate Rules for Fabrication Welding SB-148 Alloy CDA
954 for Section III, Division 1, Class 3 Construction Alternate Rules for PWHT of P-No. 6, Group 4 Material for Section III, Division 1, Class
1, 2, or 3 Construction Hydrostatic Testing of Internal Piping,Section III, Division 1, Classes 2 and 3
1693 (N-212)
03-20-78 Welding Procedure Qualifica
01-01-81 tion of Dissimilar Metal Welds When "Buttering" with Alloy Weld Metal and Heat Treat ment May Be Involved, Sec tion III, Division 1, and Sec tion IX
N-214-2 05-25-83 Use of SA-351 Grade CN7M,
12-31-83 for Valves,Section III, Divi sion 1 N-21515
05-15-78 Integrally Finned Titanium
05-15-81 Tubes,Section III, Division 1, Class 3 Construction N-217-1 01-07-80
09-07-82
12-05-84
09-05-85
02-23-87 N-220
08-28-78
07-13-84
07-13-81 Postweld Heat Treatment of Weld Deposit Cladding on Classes 1, 2, 3, MC, and CS
Items,Section III, Division 1 Code Effective Date for Com ponent Supports,Section III,
Division 1 N-226
11-20-78 Temporary Attachment of
01-01-80 Thermocouples,Section III,
Division 1, Class 1, 2 and 3 Component Construction
15Code Case N-215 was annulled effective May 15,1981. It was removed from the active Code Case listing with Revision 29 of Regulatory Guide
1.84.
N-238
05-14-79 High Temperature Furnace
01-01-82 Brazing of Seat Rings in Valve Bodies or Bonnets for Section III, Division 1, Class 1, 2, and
3 Valves Code Case N-238 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: The furnace brazing process pro cedure qualification should include a verification for nonsensitization as given in ASTM A 262-70, Practic es A or E, or ASTM A 708-74 whenever materials sub ject to sensitization are to be brazed. Documentation is required that a nonsensitizing brazing procedure was employed for valves produced to this Case.
N-247
07-09-79
01-21-82
01-21-85
01-21-88
03-14-91
04-30-93 Certified Design Report Sum mary for Component Standard Supports,Section III, Division
1, Class 1, 2, 3 and MC
N-252
11-19-79 Low Energy Capacitive Dis
07-01-82 charge Welding Method for Temporary or Permanent At tachments to Components and Supports,Section III, Division
1, and XI
Code Case N-252 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: The applicant should indicate in the Safety Analysis Report the application, the mate rial, and the material thickness to which the strain gage or thermocouple will be attached by CD welding.
1.84-11
N-260-2
12-05-85 Weld Repair of SA-182 Type
12-05-88
316 Forgings,Section III, Divi sion 1, Classes 1, 2, 3, and MC
Code Case N-260-2 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: Type 308 L welding materials should not be used to repair grade F 316 N forgings be cause of the difference in strength levels.
N-261
05-15-80
Weld Procedure Qualification
12-13-82 for Materials with Impact Re quirements for Section III, Di vision 1, Class 3 Construction N-262
01-07-80
09-07-82
09-05-85
07-27-88
03-14-91
07-27-91 Electric Resistance Spot Weld ing for Structural Use in Com ponent Supports,Section III,
Division 1 N-263
03-17-80 Alternate Thread Forms, Series
03-17-83 and Fits for Component Sup ports,Section III, Division 1 Code Case N-263 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case. 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 de sign will withstand maximum conditions of loading with the worst combination of thread tolerance.
N-271
03-17-80 Simplified Method for Analyz
02-14-86 ing Flat Face Flanges with Metal to Metal Contact Outside the Bolt Circle for Section III,
Class 2, 3, and MC Construc tion N-272
05-15-80
Compiling Data Report Forms,
01-01-82 Section III, Division 1 N-275
05-15-80
12-07-82
12-31-83 Repair of Welds,Section III,
Division 1 Code Case N-275 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: Use of the Code Case is applica ble 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 ac- ceptable 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 re moved.
N-276
03-17-80
02-14-83
02-14-86 N-279
05-15-80
07-13-81 Welding of SA-358 Pipe, Sec tion III, Division 1 Use of Torquing as a Locking Device for Section III, Division
1, Class 1, 2, 3, and MC Com ponent Supports Code Case N-279 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: When torquing or other preload ing is used as a locking device and the joint is later unloaded or disassembled, the bolting should be re placed unless it can be demonstrated or proved to the authorized nuclear inspector that the original bolting has not been permanently strained.
N-280
05-15-80 Alternate Rules for Examina
07-01-81 tion of Welds in Section III,
Class 3 Storage Tanks N-281
05-15-80
Welding Operator Performance
07-01-81 Qualification,Section III, Divi sion 1 N-282
05-15-80
05-25-83
07-30-86
07-30-89 Nameplates for Valves,Section III, Division 1, Class 1, 2, and
3 Construction N-300
11-17-80
Pressure-Temperature Ratings,
12-01-83 Hydrostatic Tests, and Mini mum Wall Thickness of Valves,Section III, Division 1, Class 1 N-302
03-16-81 Tack Welding,Section III,
11-28-83 Division 1, Construction N-309
05-11-81 Identification of Materials for
05-11-84 Component Supports,Section III, Division 1 N-314
05-11-81 Alternate Rules for Thread En
05-11-84 gagement,Section III,
Division 1 Code Case N-314 was acceptable subject to the fol lowing conditions in addition to those conditions speci fled in the Code Case: Applicants should identify in their Safety Analysis Report (1) the minimum length of thread engagement and (2) the procedure used to estab lish thread engagement.
1.84-12 d
N-316
12-11-81
09-17-84
09-17-87
08-14-90
08-14-93 N-320
07-13-81
12-31-83 N-328
12-11-81
09-17-84
09-17-87 N-336
06-17-82 Examination of Welds Inacces
06-30-83 sible During Pressure Test,Section III, Division 1, Class MC
N-339
06-17-82 Examination of Ends of Fillet
09-17-84 Welds,Section III, Division 1, Classes 1, 2, and MC
N-341
06-17-82
05-19-85
02-23-87
07-01-88 N-346
06-17-82
05-19-85
06-30-86 Certification of Level III NDE
Examiner,Section III, Division
1 and 2 Explosive Welding,Section III,
Division 1 N-347
12-07-82 Continuous Electric Resistance
12-13-85 Seam Welding of P-No. 8 Ma terials for Component Sup ports,Section III, Division 1 N-349
07-16-82 Pressure Testing Piping Sys
12-31-85 tems,Section III, Division 1, Classes 2 and 3 N-350
12-07-82 Postweld Heat Treatment
09-05-85 Thickness of Material,Section III, Division 1 Code Case N-350 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: Applicants wishing to use this Case for other than P-1 materials should demonstrate that the use of this Case will not adversely affect the re quired material properties.
N-357
12-13-82
05-19-85
07-01-88 Certification of Material for Component Supports,Section III, Division 1, Subsection NF
N-359
12-13-82 Weld Connection for Coaxial
12-31-84 Cylinders,Section III, Division
1, Class 1 N-362-2
07-12-84
04-05-87
07-27-87
07-01-88 Pressure Testing of Contain ment Items,Section III,
Division 1, Classes 1, 2, and MC
Alternate Rules for Fillet Weld Dimensions for Socket Welded Fittings,Section III, Division
1, Class 1, 2, and 3 Alternate PWHT for SA-487, Grade CA6NM,Section III,
Division 1 Thermit Brazing or Welding of Nonstructural Attachments,Section III, Division 1 N-412
04-15-85
04-15-88
04-15-91 Alternative Rules for Witness ing the Piping System Pressure Tests of Classes 1, 2, and 3 Piping Systems,Section III,
Division 1 N-413
02-14-85 Minimum Size of Fillet Welds
02-14-88 for Subsection NF Linear Type Supports,Section III,
Division 1 N-414
02-20-86
02-20-89
02-20-92 Tack Welds for Class 1, 2, 3 and MC Components and Piping Supports,Section III,
Division 1
1.84-13 N-376
05-25-83 Pressure Testing of Embedded
07-30-86 Class 2 and 3 Piping,Section III, Division 1 N-377
04-04-83 Effective Throat Thickness of
12-31-83 Partial Penetration Groove Welds,Section III, Division 1, Classes 1, 2, and 3 N-383-1
07-18-85 Weld Repair of SA-182 Auste
09-05-85 nitic Forgings,Section III, Di vision 1, Classes 1, 2, and 3 Code Case N-383-1 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: Applicants who apply the pro visions of this Case to permit material manufacturers to weld repair austenitic forgings without re-solution 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-397
02-20-84 Alternative Rules to the Spec
02-20-87 tral Broadening Procedures of N-1226.3 for Classes 1, 2, and
3 Piping,Section III,
Division 1 Code Case N-397 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case. The Code Case is acceptable for specific plant applications on a case-by-case basis pending revision of Regulatory Guide 1.122, "Devel opment of Floor Design Response Spectra for Seismic Design of Floor-Supported Equipment or Compo nents."
N-421
02-14-85 Brazing Using a Radiant
05-19-85 Energy Source,Section III,
06-30-86 Division 1 N-430
02-28-86 Alternative Requirements for
02-28-89 Welding Workmanship and
02-05-92 Visual Acceptance Criteria for
07-01-93 Class 1, 2, 3 and MC Linear Type and Standard Supports,Section III, Division 1 Code Case N-430 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: (1) The applicant should demon strate 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 thick ness, undercut depth of 1/32 in. on one side of the mem ber 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 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."
N-442
02-23-87
04-30-90
03-08-92
1977 Addendum to ANSI/
ASME PTC 25.3-1976, Safety and Safety Relief Valves, Class
1, 2, 3, and MC,Section III,
Division 1
3. REVISED CODE CASES
Code Cases that were endorsed by the NRC in a prior version of this guide and were superseded by re vised Code Cases on or after July 1, 1974, should be considered as not endorsed as of the date of the ASME
action that approved the revised version of the Code Cases. These Code Cases that are no longer endorsed are listed in the following by number, effective dates, 16 and title.
150817
12-13-71 Allowable Stresses, Design
06-30-75 Intensity and/or Yield Strength Values,Section I, III, and VIII,
Divisions 1 and 2
1516-1
06-25-73 Welding of Seats in Valves for
08-11-75 Section III Applications
16Earlier date-date Code Case was approved by ASME; later dates date revision of Code Case was approved by ASME.
17Code Case 1508 is no longer listed by ASME as a Section III Code Case and is therefore deleted from the acceptable listing.
1539
11-06-72 (N-30-1) 11-21-77 Metal Bellows and Metal Dia phragm Stem Sealed Valves,Section III, Classes 1, 2, and 3
1540-1
03-03-73 Elastomer Diaphragm Valves,
01-14-77 Section III, Classes 2 and 3
1540-2 (N-31)
01-14-77
01-07-80
02-14-83
07-18-85 Elastomer Diaphragm Valves,Section III, Class 2 and 3 Code Case 1540-2 (N-31) was acceptable subject to the following conditions in addition to those condi tions specified in the Code Case: Each applicant who applies the Code Case should indicate in the referenc ing Safety Analysis Report that the service life of the elastomer diaphragm should not exceed the manufac turer'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 elasto mer diaphragm should not exceed 5 years, and the com bined service and storage life of the elastomer dia phragm should not exceed 10 years.
1541-1
08-13-73 Hydrostatic Testing of Em
09-30-76 bedded Class 2 and Class 3 Piping for Section III
Construction
1541-2
09-30-76 Hydrostatic Testing of Em
05-15-78 bedded Class 2 and Class 3 Piping for Section III, Division
1 Construction
1552
12-18-72 Design by Analysis of Section
08-29-77 III, Class 1 Valves
1553
12-18-72 Upset Heading and Roll
03-03-75 Threading of SA-453 for Bolt ing,Section III
1555
12-18-72 Certification of Safety Relief
01-14-77 Valves on Liquids
1606
11-05-73
12-16-74 Stress Criteria for Section III,
Class 2 and 3 Piping Subjected to Upset, Emergency, and Faulted Operating Conditions Code Case 1606 was acceptable subject to the in terpretation that the stress limit designations of "Up set," "Emergency," and "Faulted" do not necessarily imply agreement with specified plant conditions appli cable to ASME Code Class 2 and 3 components for fluid systems. These designations should be estab lished and justified in the design specifications.
1.84-14 L
L
1607
11-05-73 Stress Criteria for Section III,
11-04-74 Classes 2 and 3 Vessels Sub jected to Upset, Emergency, and Faulted Operating Condi tions Code Case 1607 was acceptable subject to the in terpretation that the stress limit designations of "Up set," "Emergency," and "Faulted" do not necessarily imply agreement with specified plant conditions appli cable to ASME Code Class 2 and 3 components for fluid systems. These designations should be estab lished and justified in the design specifications.
1609-1 (N-55)
1621-2 (N-62-2)
03-01-76
08-28-78
07-13-81
04-05-84
05-25-77
05-15-80
05-25-83
07-18-85 Inertia and Continuous Drive Friction Welding,Section I, III,
IV, VIII, Division 1 and 2, and Ix Internal and External Valve Items,Section III, Division 1, Class 1, 2 and 3 Line Valves Code Case 1621-2 (N-62-2) was acceptable subject to the following condition in addition to those condi tions specified in the Code Case: The Code requires that Class 1 and Class 2 valve manufacturers meet the provisions of NCA 4000, "Quality Assurance," and, in addition, Class 3 valve manufacturers should also meet the provisions of NCA 4000.
N-62-3
07-18-85 Internal and External Valve
09-05-85 Items,Section III, Division 1, Class 1, 2 and 3 Line Valves Code Case N-62-3 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: The Code requires that Class 1 and Class 2 valve manufacturers meet the provisions of NCA 4000, "Quality Assurance," and, in addition, Class 3 valve manufacturers should also meet the pro visions of NCA 4000.
N-62-4
09-05-85 Internal and External Valve
07-27-88 Items,Section III, Division 1,
07-24-89 Class 1, 2 and 3 Code Case N-62-4 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: The Code requires that Class 1 and Class 2 valve manufacturers meet the provisions of NCA 4000, "Quality Assurance," and, in addition, Class 3 valve manufacturers should also meet the pro visions of NCA 4000.
N-62-5 - 07-24-89 Internal and External Valve
12-11-89 Items,Section III, Division 1, Class 1, 2 and 3 Code Case N-62-5 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: The Code requires that Class 1 and Class 2 valve manufacturers meet the provisions of NCA 4000, "Quality Assurance," and, in addition, Class 3 valve manufacturers should also meet the pro visions of NCA 4000.
N-62-6
12-11-89
12-11-92
05-11-94 Internal and External Valve Items,Section III, Division 1, Class 1, 2 and 3 Code Case N-62-6 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: The Code requires that Class 1 and Class 2 valve manufacturers meet the provisions of NCA 4000, "Quality Assurance," and, in addition, Class 3 valve manufacturers should also meet in the provisions of NCA 4000.
1630
(N-77)
11-04-74 External Pressure Charts for
07-10-78 High Yield Strength Carbon Steels and Low Alloy Steels.
(Yield strength above 38 Ksi to
60 Ksi Inclusive.) For Section III, Class 1, 2, 3, and MC; and Section VIII, Division 1 and 2
1683
03-03-75
03-01-76 Bolt Holes for Section III, Di vision 1, Class 1, 2, 3 and MC
Component Supports
1689
06-30-75 Alternate PWHT Time and
09-10-76 Temperature for SA-182 Grade F22,Section III, Class 1, 2, 3 and CS
Code Case 1689 was acceptable subject to the fol lowing condition in addition to that specified in the Code Case: The alternate postweld heat treatment should be prequalified along with the applicable weld ing procedure in accordance with ASME Section IX.
1695
04-28-75 Brazing,Section III, Class 3
11-03-75
1701
06-30-75 Determination of Capacities of
03-20-78 Vacuum Relief Valves,Section III, Class MC
1701-1
03-20-78 (N-95-1) 03-19-79
07-09-79
1702
06-30-75
07-11-77 Determination of Capacities of Vacuum Relief Valves,Section III, Division 1 and 2, Class MC
Flanged Valves Larger than 24 inches for Section III, Class 1,
2 and 3 Construction
1.84-15
1720
08-11-75 Weld End Preparation for Sec
03-01-76 tion III, Division 1 Construc tion Code Case 1720 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: 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
03-01-76 Weld End Preparation for Sec
11-20-78 tion III, Division 1 Construc tion Code Case 1720-1 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: 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.
1739-2
08-28-78 Pump Internal Items, Section (N-119-2) 08-25-80
III, Division 1, Class 1, 2, and 3
1739-3
08-25-80
(N-119-3) 12-01-80
Pump Internal Items,Section III, Division 1, Class 1, 2, and 3
1739-4
12-01-80 Pump Internal Items, Section (N-119-4) 02-20-8414111, Division 1, Class 1, 2,
07-18-85 and 3 N-119-5 07-18-85
09-05-85
03-01-76
01-08-79
01-21-82
01-21-85
01-21-88
07-24-89
1761
04-26-76
01-14-77
01-14-77
01-07-80
04-02-82 N-133-1
04-02-82
05-19-85 Pump Internal Items,Section III, Division 1, Class 1, 2, and 3 Stress Indices for Structural Attachments, Class 1,Section III, Division 1 Use of SB-148 Alloy CA954 for Section III, Division 1, Class 2 or 3 Flanged End Valves Use of SB-148 Alloy CA954,Section III, Division 1, Class 3 Use of SB-148 Alloys 952 and
954,Section III, Division 1, Class 3 N-133-2 05-19-85 Use of SB-148 Alloys 952 and
07-18-85
954 Section III, Division 1, Class 3
1769
08-13-76 Qualification of NDE Level III
02-16-77 Personnel,Section III,
Division 1
1774
08-13-76 Minimum Wall Thickness for
07-11-77 Class 2 and 3 Valves,Section III, Division 1
1780
09-10-76 Hydrostatic Testing and Stamp
03-10-78 ing of Pumps for Class 1 Construction,Section III, Divi sion 1 Code Case 1780 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: Each licensing application in which the Code Case is to be used should present infor mation that satisfactorily demonstrates that the subas sembly tests adequately simulate the pressure loadings.
Also, the closure fixture for the test subassembly should adequately simulate the rigidity of adjacent sub assemblies 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 in duced during the hydrostatic test of a complete pump assembly. It is not intended that piping reaction load ings be simulated in the hydrostatic testing.
1783
09-10-76 Qualification of Nondestructive
01-14-77 Personnel,Section III,
Division 1 Code Case 1783 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: The first sentence of paragraph
(1) should be replaced with the following: "The certifi cation of the Level III nondestructive examination per sonnel for the purposes of this Section of the Code shall be the responsibility of the employer of the Level III in dividual. If the employer is not a Certificate Holder, then the verification of such certificate is the responsi bility of the Certificate Holder."
1791
03-17-8018 Projection Resistance Welding (N-154)
09-09-82 of Valve Seats,Section III,
09-05-85 Division 1, Class 1, 2 and 3
12-05-85 Valves
18The Code Case was annulled on January 14, 1980 (ASME mandatory annulment date). It was reinstated on March 17,1980. Because of the cir cumstances and because there were no changes in the Code Case, the NRC considers that this Case was in effect during the period of 1-14-80
through 3-17-80.
1.84-16
1745 (N-122)
1761-1 (N-133)
1797 (N-160)
03-23-77 Finned Tubing for Construc
03-17-80 tion,Section III, Division 1
09-07-82
07-18-85 N-192
01-09-78 Use of Flexible Hose for Sec
08-30-79 tion III, Division 1, Class 1, 2, and 3 Construction Code Case N-192 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case. The applicant should indicate system application, design and operating pressure, and pressure-temperature rating of the flexible hose. Data to demonstrate compliance of the flexible hose with NC/ND-3649, particularly NC/ND-3649.4(e), are re quired to be furnished with the application.
N-192-1
08-30-79 Use of Flexible Hose for Sec
09-16-81 tion III, Division 1, Class 1, 2, and 3 Construction Code Case N-192-1 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: The applicant should indi cate system application, design and operating pressure, and pressure-temperature rating of the flexible hose.
Data to demonstrate compliance of the flexible hose with NC/ND-3649, particularly NC/ND-3649.4(e), are required to be furnished with the application.
N-196
01-09-78 Exemption from the Shake
01-08-79 down Requirements When Plastic Analysis is Performed for Section III, Division 1, Class 1 Construction N-214
05-15-78
07-13-81
09-07-82 Use of SA-351, Grade CN7M,
for Valves for Section III, Divi sion 1, Construction N-214-1 09-07-82 Use of SA-351 Grade CN7M,
05-25-83 for Valves,Section III, Divi sion 1 N-237
07-09-79
01-21-82
09-07-82 Hydrostatic Testing of Internal Piping,Section III, Division 1 N-237-1
09-07-82 Hydrostatic Testing of Internal
05-25-83 Piping,Section III, Division 1, Classes 2 and 3 N-260
01-07-80
05-25-83
07-18-85 Weld Repair of SA-182 Type
316 Forgings,Section III, Divi sion 1, Classes 1, 2, 3, and MC
N-260-1 07-18-85 Weld Repair of SA-182 Type
12-05-85 316 Forgings,Section III, Divi sion 1, Classes 1, 2, 3,and MC
Code Case N-260-1 was acceptable subject to the following condition in addition to those conditions spe cified in the Code Case: Type 308 L welding materials should not be used to repair grade F 316 N forgings be cause of the difference in strength levels.
N-304
06-11-81
04-05-84
07-12-84 Use of 20Cr-25Ni-6Mo (Alloy UNS N08366) Welded Tubes for Section III, Division 1, Classes 2 and 3 Construction N-304-1
07-12-84 Use of 20Cr-25Ni-6Mo (Alloy
05-19-85 UNS N08366) Welded Tubes for Section III, Division 1, Classes 2 and 3 Construction N-304-2
05-19-85 Use of SB-676 20Cr-25Ni-6Mo
12-05-85 (Alloy UNS N08366) Welded Tubes,Section III, Division 1, Classes 2 and 3 N-304-3 12-05-85 Use of SB-676 2OCr-25Ni-6Mo
02-23-87 (Alloy UNS N08366) Plate, Sheet, Strip and Welded Pipes,Section III, Division 1, Classes
2 and 3 N-309
09-17-8419 Identification of Materials for
12-05-85 Component Supports, Section SIII, Division 1 N-318
07-13-81 Procedure for Evaluation of the
02-20-84 Design of Rectangular Cross Section Attachments on Class
2 or 3 Piping,Section III, Divi sion 1 Code Case N-318 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case. Applicants should identify in their Safety Analysis Report: (1) the method of lug at tachment, (2) the piping system involved, and (3) the location in the system where the Case is to be applied.
N-318-1 20 02-20-84 Procedure for Evaluation of the
07-12-84 Design of Rectangular Cross Section Attachments on Class
2 or 3 Piping,Section III, Divi sion 1
19The Code Case was annulled on May 11, 1984 (ASME mandatory an nulment date). It was reinstated on September 17, 1984. Because of the circumstances and because there were no changes in the Code Case, the NRC considers that this Case was in effect during the period of 5-11-84 through 9-17-84.
20 'he conditional acceptance was inadvertently omitted in Revision 23 of this guide.
1.84-17
Code Case N-318-1 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case. 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 Case is to be applied.
N-318-2 07-12-84 Procedure for Evaluation of the
09-05-85 Design of Rectangular Cross Section Attachments on Class
2 or 3 Piping,Section III, Divi sion 1 Code Case N-318-2 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case. 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 Case is to be applied.
N-318-3 09-05-85 Procedure for Evaluation of the
07-27-88 Design of Rectangular Cross
12-11-89 Section Attachments on Class
2 or 3 Piping,Section III, Divi sion 1 Code Case N-318-3 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case. 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 Case is to be applied.
N-318-4
12-11-89 Procedure for Evaluation of the
12-11-92 Design of Rectangular Cross
04-28-94 Section Attachments on Class
2 or 3 Piping,Section III, Divi sion 1 Code Case N-318-4 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case. 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 Case is to be applied.
N-319
07-13-81
07-13-84
07-13-87
07-24-89 N-319-1
07-24-89
08-14-90
Alternate Procedure for Evalu ation of Stresses in Butt Weld Elbows in Class 1 Piping, Sec tion III, Division 1 Alternate Procedure for Evalu ation of Stresses in Butt Weld Elbows in Class 1 Piping, Sec tion III, Division 1 N-345
06-17-82 Attachment of AMS 5382
12-13-82 Alloy 31 Seat Rings by Fric tion Welding,Section III, Divi sion 1, Classes 1, 2, and 3 N-362
02-14-83 Alternate Rules for Pressure
05-25-83 Testing of Containment Items,Section III, Division 1 N-362-1
05-25-83 Pressure Testing of Contain
07-12-84 ment Items,Section III, Divi sion 1, Classes 1, 2, and MC
N-383
10-05-83 Weld Repair of SA-182 Auste
07-18-85 nitic Forgings,Section III, Di vision 1, Classes 1, 2, and 3 Code Case N-383 was acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: Applicants who apply the provi sions of this 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
11-28-83 Procedure for Evaluation of the
07-30-86 Design of Hollow Circular
07-24-89 Cross Section Welded Attach ments on Class 1 Piping, Sec tion III, Division 1 N-392
11-28-83 Procedure for Evaluation of the
07-30-86 Design of Hollow Circular
07-30-89 Cross Section Welded Attach
12-11-89 ments on Classes 2 and 3 Pip ing,Section III, Division 1 N-392-1
12-11-89 Procedure for Evaluation of the
12-11-92 Design of Hollow Circular Cross Section Welded Attach ments on Classes 2 and 3 Pip ing,Section III, Division 1 Code Case N-392-1 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: 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 Case is to be applied.
N-411
09-17-84 Alternative Damping Values
02-20-86 for Seismic Analysis of Classes
1, 2, and 3 Piping Sections,Section III, Division 1 Code Case N-411 was acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: (1) The damping values specified
1.84-18 K
may be used in analyzing piping response for seismic and other dynamic loads being filtered through build ing structures provided response mode frequencies are
___
limited to 33 Hz and below. Within this range, the Code Case damping should be used completely and consis tently, 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 val ues 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 re sponse 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 recon ciliation 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 ana lyzing 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-453
12-07-87 Nickel-Chromium-Molybde
11-30-88 num-Copper Stainless Steel (UNS N08925) Welded Pipe for Class 2 and 3 Construction,Section III, Division 1 N-453-1
11-30-88
12-16-91
04-30-92 N-454
12-07-87
12-03-90
04-30-92 Nickel-Chromium-Molybde num-Copper Stainless Steel (UNS N08925) Seamless and Welded Pipe for Class 2 and 3 Construction,Section III, Divi sion 1 Nickel-Chromium-Molybde num-Copper Stainless Steel (UNS N08925) Wrought Fit tings for Class 2 and 3 Construction Section III, Divi sion 1 N-455
12-07-87
12-03-90
04-30-92 Nickel-Chromium-Molybde num-Copper Stainless Steel (UNS N08925) Forged Flanges and Fittings for Class 2 and 3 Construction Section III, Divi sion 1
4. UNACCEPTABLE CODE CASES
Code Cases for Class 1 components that are not on the approved list of this guide (paragraph C. 1) or other regulatory guides, or for which authorization by the Commission has not been granted, are not acceptable for Class 1 components. Code Cases for other classes of components that are not on the approved list of this guide (paragraph C.1) or other regulatory guides should be considered not acceptable on a generic basis.
D. IMPLEMENTATION
The purpose of this section is to provide informa tion to applicants regarding the use of this regulatory guide.
1. Except for those Code Cases that have been an nulled by action of the ASME, the NRC staff has found the Code Cases listed in this regulatory guide under Regulatory Position 1 acceptable for ap propriate use. Other Code Cases may be considered for use in accordance with footnote 6 of the Codes and Standards rule, 10 CFR 50.55a.
2. Components ordered to a specific version of a Code Case need not be changed because a subsequent re vision to the Code Case is listed as the approved version in this guide.
3.
Components ordered to a Code Case that was pre viously approved for use need not be changed be cause the Code Case has been subsequently an nulled.
4. Code Cases on the approved list may be applied to components that were in the process of construc tion prior to the effective date of the Code Case within the limits specified in the Code Case and ap plicable regulations or recommended in other regu latory guides.
1.84-19
APPENDIX
NUMERICAL LISTING OF CODE CASES
N-62-7 N-309-1 N-122-2 N-313 N-133-3 N-315 N-154-1 N-318-5 N-155-2(1792-2)
N-345-1 N-160-1 N-368 N-192-2 N-369 N-240
N-391-1 N-241 N-392-2 N-243 N-393 N-284 N-394 N-292 N-395 N-304-4 N-410
N-411-1 N-420
N-433 N-452 N-453-1 N-454 N-455 N-464 N-476 N-505 N-511 N-520
VALUE/IMPACT STATEMENT
A draft value/impact statement was published with the draft of this guide when it was published for public comment (Task DG-1048, May 1997). No changes were necessary, so a separate value/impact statement for Revision 31 of Regulatory Guide 1.84 has not been prepared. A copy of the draft value/im pact statement is available for inspection or copying for a fee in the NRC's Public Document Room at 2120 L Street NW., Washington, DC, under Task DG-1048.
1.84-20
[