ML20140G991

for Comment Issue of Draft Rev 31 to Reg Guide 01.084, Task DG-1048, Design & Fabrication Code Case Acceptability, ASME Section Iii,Div 1

ML20140G991
Person / Time
Issue date:	05/31/1997
From:	NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
To:
References
TASK-*****, TASK-DG-1048, TASK-RE REGGD-01.084, REGGD-1.084, NUDOCS 9705120276
Download: ML20140G991 (38)

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. _ __

/ U.S. NUCLEAR REGULATORY COMMISSION May 1997 I p, 0FFICE OF NUCLEAR REGULATORY RESEARCH Divisien 1 5

• Draft DG-1048 DRAFT REGULATORY GUIDE

) ee**e

Contact:

E.O. Woolridge (301)415-6004 DRAFT REGULATORY GUIDE DG-1048  ;

(Proposed Revision 31 to Regulatory Guide 1.84) '

DESIGN AND FABRICATION CODE CASE ACCEPTABILITY, ASME SECTION III, DIVISION 1 l

A. INTRODUCTION ,y )

4$  % 1 Section 50.55a, " Codes and Standards," of 10 CFR Part 50, *_" Dome 't4; Licensing of Production and Utilization Facilities," requires, in parthhah components of the s y w reactor coolant pressure boundary be designed, fabricatedI erected, and tested in ye -

accordance with the requirements for Class I components of!Section III, " Nuclear Power Plant Components,"2 ofNhanY of the American Societh! w g v [al Engineers (ASME)

Boiler and Pressure Vessel Code or equivalent quajity' standards. Footnote 6 to j j q v 9 50.55a states that the use of specific Code Casedimay be authorized by the 3 w

}CommissionuponrequestpursuanttoS50(ws a.(3), which requires that proposed55a alternatives to the described requirementsCor~ portions thereof provide an acceptable m 9 level of quality and safety. # $

x General Design Criterion g lyQtiant Standards and Records," of Appendix A,

' General Design Criteria for Nuclear'jPower Plants," to 10 CFR Part 50 requires, in p:rt,thatstructures,systemshin[componentsimportanttosafetybedesigned, fabricated, erected, and tested to quality standards commensurate with the As importanceofthesafetje(unctiontobeperformed. Where generally recognized codes andstandardsareyueN iterion1requiresthattheybeidentifiedandevaluated h/

ff

' Copies f may be $. wbtai7ied from the American Society of Mechanical Engineers, United O j l Enginee

, East 47th $%ftet, New York, New York 10017, 1

N This regulatory guide le being issued in draft form to involve the public in the oorly stegos of the development of a regulatory position in this T stee. It has not received complete staff review and does not represent en official NRC staff position.

Public commente are being solicited on the draft guide (including any implementation schedule) and its associated regulatory analysis or tralue/ impact statement. Commente should be accompanied by appropriate supporting data. Written commente may be submitted to the Rulee and Directives drench, DAS, Office of Administration, U.S. Nuclear Regulatory Commission, Washington, DC 20555. Copies of commente received may be examined at the NRC Public Document Room,2120 L Street NW., Washington, DC. Comments will be most helpfulif received by July 21,1997.

Requeste for single copies of active or draft regulatory guides (which may be reproduced) or for placement on en automatic distribution list for eingle copies of future draft guides in specific divisione should be made in writing to the U.S. Nucteer Regulatory Commission, Washington, DC 20555, Attention: Office of Information Resources Management, Distribution Serviceo Section; or by f ax to (301)415-2200.  ;

9705120276 970531 -int HT Flt lif (( %6 l]i mal 10 H l PDR REGGD *glMll 01.084 R PDR - ' ' ' ' ' '

• to determine their applicability, adequacy, and sufficiency and be supplemented or modified m cecessary 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 Nuclear Power Plants and Fuel Reprocessing 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 lists those Section III ASME Code Cases oriented to design and fabrication that are generally acceptable to the NRC staff for implementation in the licensing of light-water-cooled nuclear power plants. This guide is being issued for public comment on the NRC staff position on new code cases, revised code cases, and annulled code cases since Revision 30 of the guide.

Regulatory guides are issued to describe and make available to the public such information as methods acceptable to the NRC staff for implementing specific parts of the Commission's regulations, techniques used by the staff in evaluating specific problems or postulated accidents, and guidance to applicants.

Regulatory guides are not substitutes for regulations, and compliance with regulatory guides is not required. Regulatory guides are issued in draft form for public comment to involve the public in the er.rly stages of developing the regulatory positions. Draft regulatory guides have not received complete staff review and do not represent official NRC staff positions.

This regulatory guide contains no information collection activities and, therefore, is not subject to the 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."' Generally, the individual Code Cases that make up this document explain the intent of Code rules or provide for alternative requirements under special circumstances.

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Most Code Cases are eventually superseded by revision to the Code and then I are annulled by action of the ASME. In such cases, the intent of the annulled Code Case becomes part of the rev'aed Code, and therefore continued use of the Code Case intent is sanctioned under 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 approved 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 toward 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 2 i reviewed for inclusion in this guide. In addition to the listing of acceptable Code Cases, this revision of the guide includes listings of (1) Code Cases that were identified as acceptable in a prior version of this regulatory guide and that were annulled after the original issuance of this guide (June 1974) and (2)

I Code Cases that were identified as acceptable in a prior version of this i 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 endorsed or will require supplementary provisions on an l individual basis to attain endorsement status.

The endorsement of a Code Case by this guide constitutes acceptance of its technical position for applications not precluded by regulatory or other requirements or by the recommendations in this or other regulatory 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 no conflicts with other recommended limitations resulting from Code Case usage.

Acceptance or endorsement by the NRC staff applies only to those Code Cases or Code Case revisions with the date of ASME approval as shown in the regulatory I position of this guide. Earlier or later revisions of a Code Case are not endorsed by th h guide. New Code Cases will require evaluation by the NRC staff to determine 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 I

' Lines indicate substantive changes from Revision 30.

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will require periodic updating to accommodate new Code Cases and any revisions of existing Code Cases.

C. REGULATORY POSITION 1

1. ACCEPTABLE CODE CASES The Section III ASME Code Cases' listed below (by number, date of ASME approval, and title) are acceptable to the NRC staff for application in the construction of components for light-water-cooled nuclear power plants. Their use is acceptable within the limitations 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 within 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 intended 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 aoolicable to oicina desian:

N-122-2 04-28-94 Procedure for Evaluation of the Design of Rectangular Cross Section Attachments on Class 1 Piping,Section III, Division 1 N-160-1 07-18-85 Finned Tubing for Construction,Section III, 07-18-88 Division 1 03-14-91 03-14-94 N-453-2 04-30-92 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N08925 and N08926) Seamless and Welded Pipe for Class 2 and 3 Construction,Section III, Division 1

'A numerical listing of the Code Cases appears in the appendix.

"When 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.

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1 N -454-1 04-30-92 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS D N08925 and N08926) Wrought Fittings for Class 2 and 3 Construction Section III, Division 1 N-455-1 04-30-92 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N08925 and N08926) Forged Flanges and Fittings for Class 2 and 3 Construction,Section III, Division 1 (2) Code Cases aoolicable to valve desian:

N-133-3 07-18-85 Use of SB-148 Alloys 952 and 954,Section III, 07-18-88 Division 1, Class 3 03-14-91 03-14-94 N-313 05-11-81 Alternate Rules for Half-Coupling Branch Connection ~s, 11-28-83 Section III, Division 1 l

11-28-86 l 11-28-89 l 11-28-92 l l N-394 02-2';-84 Restricting Lift to Achieve Reduced Relieving 07 '30-86 Capacities of Full Lift, Nozzle Typc, and Flat ,

07 30-89 Seated Safety and Safety Relief Valves for 1 0'-27-92 Compressible Fluid Applications,Section III, Division 1, l Classes 2 and 3 I I N-410 12-05-84 Certified Relieving Capacities of Pressure Relief 07-27-88 Valves Having Set Pressure of 3 psig up to but Not 03-14-91 Including 15 psig Installed for Overpressure 03-14-94 Protection of Compressible Fluid Systems,Section III, i Division 1, Classes 2 and 3 I (3) Other Code Cases related to desian:

N-122-2 04-28-94 Procedure for Evaluation of the Design of Rectangular Cross Section Attachments on Class 1 Piping,Section III, Division 1 N-243 08-30-79 Boundaries Within Castings Used for Core Support 07-16-82 Structures, Saction III, Division 1, Class CS 05-19-85 05-19-88 03-14-91 03-14-94 l N-309-1 12-05-85 Identification of Materials for Component Supports, 07-27-88 Section III, Division 1 03-14-91 N-411-1 02-20-86 Alternative Damping Values for Response Spectra 02-20-89 Analysis of Classes 1, 2, and 3 Piping,Section III, 04-30-92 Division 1 D

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Code Case N-411-1 is acceptable subject to the following conditions in addition to those conditions specified 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 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 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.

N-420 02-14-85 Linear Energy Absorbing Supports for Subsection NF, 02-14-88 Classes 1, 2, and 3 Construction,Section III, 03-14-91 Division 1 l 03-14-94 Code Case N-420 is acceptable subject to the following conditions in addition to those conditions specified in the Code Case. Each applicant desiring to use the Code Case should provide the following information prior to implementing the Case: (1) indication of systems in which energy-absorbing supports are to be used, (2) fatigue design, (3) piping system analysis results considering inelastic behavior of supports, and (4) plans for inservice examination of energy abs hers.

N-433 12-16-86 Non-Threaded Fasteners for Section III, Division 1, 12-16-89 Class 1, 2, and 3 Component and Piping Supports, l 12-16-92 Section III, Division 1 N-476 05-06-89 Class 1, 2, 3, and MC Linear Component Supports-Design 07-27-92 Criteria for Single Angle Members,Section III, Division 1, Subsection NF N-505 07-27-92 Alternative Rules for the Examination of Butt Welds Used as Closure Welds for Electrical Penetration Assemblies in Containment Structures,Section III, Division 1 N-511 02-12-93 Design Temperature for Atmospheric 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 Construction,Section III, Division 1 ,

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b. Fabrication-oriented Code Cases:

(1) Code Cases related to weldina and brazina:

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N-154-1 12-05-85 Projection Resistance Welding of Valve Seats, 12-05-88 Section III, Division 1, Class 1, 2, and 3 Valves 02-05-92 N-304-4 02-23-87 Use of 20Cr-25Ni-6Mo (Alloy UNS N08366) Plate, Sheet, i 12-11-89 Strip and Welded Pipe, Class 2 and 3 Section III, j 02-12-93 Division 1 l l N-315 02-14-83 Repair of Bellows,Section III, Division 1 l 02-19-86 l 02-19-89 02-05-92 Code Case N-315 is acceptable subject to the following conditions in addition to those conditions specified in the Code Case: Prior to implementation of the Code Case, the applicant should present a description of the repair and a justification why the bellows should be repaired rather than replaced. Following receipt of approval for the repair, but prior to making the repair, the applicant should present the results of the qualification on the full-scale facsimile bellows, including the design requirements, to ensure that the repair meets the requirements of the design specification.

I N-345-1 12-13-82 Attachment of AMS 5382 Alloy 31 Seat Rings by Fric-06-30-88 tion Welding,Section III, Division 1, 03-14-91 Classes 1, 2, and 3 03-14-94 l

N-391-1 07-24-89 Procedure for Evaluation of the Design of Hollow 07-27-92 Circular Cross Section Welded Attachments on Class 1 Piping,Section III, Division 1 Code Case N-391-1 is acceptable subject to the following 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 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attachments on Classes 2 and 3 Piping,Section III, Division 1 Code Case N-392-2 is 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.

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N-393 11-28-83 Repair Welding Structural Steel Rolled Shapes and 07-30-86 Plates for Component Supports,Section III, Division 1 07-30-89 07-27-92 N-395 12-11-89 Laser Welding,Section III, Division 1 12-11-92 N-452 03-08-89 Specialized Subcontracted Welding Process (Electron 04-30-92 Beam Welding),Section III, Division 1 N-464 03-08-89 Laser Welding of Lap-Joints,Section III, Division 1, 04-30-92 Class 2 and 3 Construction (2) Other Code Cases Related to Fabrication:

N-240 03-19-79 Hydrostatic Testing of Open Ended Piping,Section III, 01-21-82 Division 1 09-17-84 09-17-87 i 08-14-90 1 08-14-93 N-241 07-09-79 Hydrostatic Testing of Piping,Section III, Division 1 01-21-82 '

09-17-84 09-17-87 12-11-89 I

] 12-11-92 N-368 07-06-83 Pressure Testing of Pump Discharge,Section III, j 06-30-87 Division 1, Classes 2 and 3 '

08-14-90 08-14-93 l

1 Code Case N-368 is acceptable subject to the following condition in addition to those conditions specified in the Code Case: Applicants using this Code Case should provide information to demonstrate that the length of discharge piping is reasonably short. i N-369 02-14-83 Resistance Welding of Bellows,Section III, Division 1 ,

02-19-86 1 02-19-89 02-05-92 .

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c. Code Cases with Continaent Acoroval: l 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 following condition in i addition to those conditions specified in the Code Case: The Code requires l that Class 1 and Class 2 valve manufacturers meet the provisions of NCA  ;

4000, " Quality Assurance," and, in addition, Class 3 valve manufacturers i should also meet the provisions of NCA 4000.

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1792-2 01-08-79 Fiberglass Reinforced Thermosetting Resin Pipe,

> (N-155-2) 01-21-82 Section III, Division i 01-21-85 01-21-88 03-14-91 1 03-14-94 I Code Case 1792-2 (N-155-2) is acceptable subject to the following condition in addition to those conditions specified in the Code Case: The applicant should comply with the additional requirements that are specified in Regulatory Guide 1.72, " Spray Pond Piping Made from Fiberglass-Reinforced Thermosetting Resin."

N-192-2 09-16-81 Use of Braided Flexible Connectors,Section III, 09-17-84 Division 1, Class 2 and 3 09-17-87 08-14-90 08-14-93 l Code Case N-192-2 is acceptable subject to the following conditions in addition to those conditions specified in the Ccde 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 required to be furnished with the application.

N-284 08-25-80 Metal Containment Shell Buckling Design Methods, 05-25-83 Section III, Division 1, Class MC

, 07-30-86 07-30-89 07-27-92 Code Case N-284 is acceptable subject to the following condition in addition to those conditions specified in the Code Case: Prior to implementation of the Code Case, the applicant must demonstrate to the satisfaction of the NRC staff (via Safety Analysis Report) that any axisymmetric techniques that are proposed will be applicable to a vessel having large asymmetric openings and that the overall margin used to prevent shell buckling is acceptable.

N-292 01-05-81 Depositing Weld Metal Prior to Preparing Ends for 11-28-83 Welding,Section III, Division 1, Class 1, 2, and 3 07-30-86 Construction 07-30-89 07-27-92 Code Case N-292 is acceptable subject to the following conditions in addition to those conditions specified in the Code Case: 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 should receive a 100 percent volumetric examination (RT or UT) of the. deposited weld metal in accordance with the requirements of ND-5000.

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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, Division 1 Code Case N-318-5 is 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.

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 we 1974, are listed below by number, effective dates,pe andannulled title. pn or after July 1, 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-l' 03-09-72 Electron Beam Welding, Section 1, III, and VIII, 02-16-77 Division 1 and 2 7

1470-2 12-18-72 External Pressure Charts for High-Strength Carbon Steels 11-04-74 and for Low-Alloy Steels,Section VIII, Division 1 and 2, and Section III 1471-1 03-09-72 Vacuum Electron Beam Welding of Tube Sheet Joints, 01-01-78 Section III 1477-1 03-09-72 Use of 1970 Addenda of ANSI B31.7,Section III 01-01-78 1494-1 03-03-73 Weld Procedure Qualification Test,Section III 01-01-78 1506 12-13-71 Stress Intensification Factors,Section III, Class 2 01-01-78 and 3 Piping

• Earlier 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.

" Code 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.

' Code Case 1461-1 is no longer listed as a Section Ill Code Case and is therefore deleted from the acceptable listing.

'The annulment of Code Case 1470-2 was effective upon ASME approval of Code Case 1630. However, because of an oversight, the annulment was not noted until publication of Supplement No. 13 to the 1974 Code Cases.

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1516-2 08-11-75 Welding of Seats or Minor Internal Permanent (N-24) 07-01-78 Attachments in Valves for Section III Applications 1516-2 11-20-78 Welding of Seats or Minor Internal Permanent (N-24) 01-01-80 Attachments in Valves for Section III Applications 1533' 06-14-72 Pressure Temperature Ratings of SA-351 Grades CF8A, 07-01-75 CF3, and CF3M,Section III 1535-2 04-30-73 Hydrostatic Testing of Seci. ion III, Class 1 Valves 03-21-77 1536 08-14-72 Closing Seam for Electrical Penetrations for 07-01-77 Section III, Class 2, 3, and MC 1539-1 11-21-77 Metal Bellows and Metal Diaphragm Stem Sealed Valves, (N-30-1) 01-01-81 Section Ill, Division 1, Classes 1, 2, and 3 N-31-1 07-18-85 Elastomer Diaphragm Valves,Section III, Class 2 and 3 07-18-88 03-14-91 07-01-93 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 O Analysis Report that the service life of the elastomer diaphragm should not i 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.

1541-3 05-15-78 Hydrostatic Testing of Embedded Class 2 and Class 3 (N-32-3) 07-01-79 Piping for Section III, Division 1 Construction N-32-4 03-16-81 Hydrostatic Testing of Embedded Class 2 and 3 Piping 03-16-84 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 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

'This revision of tte Code Case was originally approved by the ASME on 8-11-75 and was annulled on 7-1-78 because of the publication of revisions to Section ill in the Winter 1977 Addenda. However, the users did not believe that the Code Case was covered in the Code revision; therefore, ASME reaf firmed the Case on 11-20-78. Because of these circumstances 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.

\ /

~

• Code Case was annulled on date as indicated, but the annulment was first indicated in Revision 12 to this guide.

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Code. The intent of the Code Case is to (1) provide additional testing above Code requirement 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.

1552-1 08-29-77 Design by Analysis of Section III, Class 1 Valves (N-35-1) 07-01-79 1553-l' 03-03-75 Upset Heading and Roll Threading of SA-453 for ?,olting 01-01-76 in Section III 1555-1 01-14-77 Certification of Safety Relief Valves, Sectica III, 01-01-78 Division 1 1569 03-03-75' Design of Piping for Pressure Relief Valve Station, 07-01-79 Section III Code Case 1569 was acceptable subject to compliance with the recommendations contained in Regulatory Guide 1.67, " Installation of Over-pressure Protection Devices."

1573 04-30-73 Vacuum Relief Valves,Section III 01-01-78 1574 04-30-73 Hydrostatic Test Pressure for Safety Relief Valves, 12-31-74 Section III 1580-1 11-05-73 Buttwelded Alignment Tolerance an'J Acceptable Slopes 01-01-78 for Concentric Centerlines for Sectior III, Class 1, 2, i and 3 Construction 1581 06-25-73 Power-0perated Pressure Relief Va?ves,Section III 03-01-79 1588 08-13-73 Electro-Etching of Section III Code Symbols (N-46) 03-19-79 03-19-82 1601 11-05-73 Limits of Reinforcement for Two-Thirds Area, 07-01-74 Section III, Class 1

, 1606-1 12-16-74 Stress Criteria Section III, Classes 2 and 3 Piping Subject to Upset, Emergency, and Faulted Operating 07-01-77 Conditions O

" Corrected date.

12 <

l 1

i 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 11-04-74 Stress Criteria for Section III, Classes 2 and 3 07-01-77 Vessels Designed to NC/ND-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.

N-55-1 04-05-84 Inertia and Continuous Drive Friction Welding, (1609) 04-05-87 Section III, Division 1 1614 12-17-73' Hydrostatic Testing of Piping Prior To or Following 01-01-79 the Installation of Spray Nozzles ior Section III, Classes 1, 2, and 3 Piping Systems 1620 03-02-74 Stress Category for Partial Penetration Welded (N-61) 01-08-79 Penetrations,Section III, Class 1 Construction 01-08-82 1623 03-02-74 Design by Analysis for Section III, Class I Sleeve-03-01-79 Coupied and Other Patented Piping Joints 1630-1 07-10-78 External Pressure Charts for High Yield Strength (N-66-1) 07-10-81 Carbon Steels and Low Alloy Steels. (Yield Strength above 38 Ksi to 60 Ksi Inclusive.) For Section III, Class 1, 2, 3, and MC 1630-1 12-11-81" External Pressure Charts for High Yield Strength (N-66-1) 12-05-84 Carbon Steels and Low Alloy Steels. (Yield Strength 12-05-87 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, and 3 Valve Body or 01-01-78 Bonnets,Section III 1635-l 08-12-74 Stress Criteria for Section III, Class 2 and 3 Valves 07-01-77 Subjected to Upset, Emergency, and Faulted Operating Conditions .

"The Code Case was annulled on July 10,1981 ( ASME mandatory annulment 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.

" Code 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.

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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" 08-12-74 Stress Criteria for Section III, Class 2 and 3 Pumps 07-01-77 Subjected to 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.

1651 08-12-74 Interim Requirements for Certification of Component 03-01-79 Supports,Section III, Subsection NF 1657 11-04-74 Stress Criteria for Class 2 and 3 Atmospheric and Low 07-01-77 Pressure (0-15 psig) Steel Storage Tanks 1659 11-04-74 Interconnection of Two Piping Systems for Section III, 07-01-77 Class 1, 2, and 3 Construction 1660 11-04-74 Overpressure Protection Under Emergency Operating (N-77) 03-01-79 Conditions for Section III, Class 1 1661 11-04-74 Postweld Heat Treatnent P-No.1 Materials for 01-01-78 Section III, Class 1 Vessels 1662 11-04-74 Shop Assembly of Components, Appurtenances and 01-01-78 Piping Subassemblies for Section III, Class 1, 2, 3 and MC Construction 1665 11-04-74 Pressure-Temperature Ratings for Class 1 Valves Made (N-81) 07-01-78 from 5 Cr-1/2 Mo,Section III 1672 11-04-74 Nuclear Valves for Section III, Division 1, 03-21-77 Class 1, 2, 3 Construction 1675 12-16-74 Tubesheet to Shell or Formed Head Weld Joints, 07-01-76 Section III, Class 1 Vessels 1676' 12-16-74 Clarification of Stress Intensities in Curved Pipe or 07-01-76 Welded Elbows,Section III 1677 12-16-74 Clarification of Flange Design Loads, (N-82) 03-01-79 Section III, Class 1, 2, and 3 1678 12-16-74 Butterfly Valves of Circular Cross Section 01-08-79 Larger than 24 in. NPS for Section III, 01-01-80 Class 2 and 3 Construction 14

1681-1" 03-03-75 Organizations Accepting Overall Responsibility

} (N-84) 03-01-79 for Section III Constiuction 1683-1 03-01-76 Bolt Holes for Section III, Class 1, 2, 3 and MC 07-01-76 Component Supports 1685 04-28-75 Furnaca Brazing Section III, Class 1, 2, 3 and 01-01-78 MC Construction 1686 03-03-75 Furnace Brazing,Section III, Subsection NF, 01-01-78 Component Supports 1689-1 09-10-76 Alternate PWHT Time and Temperature for SA-182 01-01-78 Grade F-22, SA-387 Grade 22, Class 2, and SA-335 Grade P-22 Section 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 welding procedure in accordance with ASME Section IX.

169P 04-28-75 Rules for Design of Welded Class 1 Pumps (N-50) 07-01-78 1695-1 11-03-75 Brazing,Section III, Division 1, Class 3 01-01-78 I 1700 11-03-75 Determination of Capacities of Liquid Relief Valves, (N-94) 03-19-79 Section III, Division 1, Class 1, 2, and 3 03-19-82 1701-2 07-09-79 Determination of Capacities of Vacuum Relief Valves, (N-95-2) 07-09-82 Section III, Division 1, Classes 2, 3, and MC and Division 2 Concrete Containments 1702-1 07-11-77 Flanged Valves Larger than 24 inches for Section III, (N-96-1) 01-01-80 Division 1, Class 1, 2, and 3 Construction 1703 06-30-75 Brazing of Copper Alloys,Section III, Class 2 01-01-78 1706 06-30-75 Data Report Forms for Component Supports,Section III, 12-31-75 Class 1, 2 and 3 1711 11-03-75 Pressure Relief Valve Design Rules,Section III, (N-100) 01-08-79 Division 1, Class 1, 2 and 3 01-21-82 01-01-83 D " Code Case 1681 was approved by ASME on 12-16-74 and revised on 3-3-75.

effect on biarch 31, 1975, the Code Case was not included in this guide, Because Code Case 1681 was not in 15

Code Case 1711 was acceptable subject to the following conditions in addition to those conditions specified 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 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 Case for Class 1 and paragraph 3.2,Section II, of the Case for Class 2 and 3 pressure relief valves.

(2) If Case 1660 is to be used in conjunction with this Case, it should be stated that the stress limits of Case 1660 supersede those of paragraph 3.2(b),Section I, of Case 1711. Functional assurance of (1) above is required in all situations.

1712 08-11-75 Nameplates and Stamping for Section III, Division 1, (N-101) 03-01-79 Class 1, 2, 3 and MC Construction as Referenced in NA-8300 1718' 08-11-75 Design of Structural Connections for Linear Type 07-01-76 Component Supports,Section III, Division 1, Class 1, 2 and 3 and MC 1719' 08-11-75 Single-Welded, Full-Penetration Sidewall Butt Joints 07-01-76 in Atmospheric Storage Tanks,Section III, Division 1, Class 2 1720-2 11-20-78 Weld End Preparation for Section III, Division 1 (N-106-2) 08-28-81 Construction 09-17-84 09-17-87 08-14-90 08-14-93 Code Case 1720-2 (N-106-2) was acceptable subject to the following condition in addition to those conditions specified 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.

1726 11-03-75 Refinement of Low Alloy Steel Heat Affected Zone (N-109) 03-01-79 Under Overlay Cladding,Section III, Division 1, Class 1 Components 1727 12-22-75 Alternate Test Fluids,Section III, Division 1 (N-110) 01-01-79 Code Case 1727 was acceptable subject to the following condition in addition to those conditions specified 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 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.

16

1729 11-03-75 Minimum Edge Distance-Bolting for Section III, (N-111) 03-01-79 9ivision 1, Class 1, 2, and 3 and MC Construction of

}

Component Supports 1732 11-03-75 Hardsurfaced Valves with Inlet Connections less than (N-114) 01-01-79 2-in. Nominal Pipe Size for Section III, Division 1, Class 1 and 2 Construction 1733 11-03-75 Evaluation of Safe Shut Down Earthquake Loadings for (N-115) 01-01-78 Section III, Division 1, Class MC Containment Vessels 1734 11-03-75 Weld Design for Use for Section III, Division 1, (N-116) 01-01-78 Class 1, 2, 3 and MC Construction of Component Supports Code Case 1734 was acceptable subject to the following conditions in addition to those conditions specified 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 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 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 3 Pump Internal Items,Section III, Division 1, Class 1, (N-119-4) 12-01-83 2, and 3 I

N-119-6 09-05-85 Pump Internal Items,Section III, Division 1, Class 1, 07-27-88 2 and 3 03-14-91 03-14-94 1744 03-01-76 Carbon Steel Pipe Flanges Larger than 24 in.,

(N-121) 03-01-79 Section III, Division 1, Class 2 and 3 Construction 1765 04-26-76 Machining After Hydrostatic Testing Class 2 and 3 07-01-77 Construction,Section III, Division 1 1768 06-29-76 Permanent Attachments to Containment Vessels--Class MC, 01-01-78 Section III, Division 1 1769-1 02-16-77 Qualification of NDE Level III Personnel,Section III, 10-01-77 Division 1 1774-1 07-11-77 Minimum Wall Thickness for Class 2 and 3 Valves, (N-142-1) 01-01-80 Section III, Division 1 1775 08-13-76 Data Report Forms for Core Support Structures, 08-13-79 Class CS,Section III, Division 1 "The Code 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.

17

1780-1 07-10-78'" Hydrostatic Testing and Stamping of Components, (N-146-1) 12-11-81 Section III, Division 1 Construction 01-01-82 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 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.

1783-1 01-14-77 Qualification of. Nondestructive Examination Personnel, 01-01-79 Section III, Division 1 Code Case 1783-1 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: 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 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."

1791 01-14-77 Projection Resistance Welding of Valve Seats, (N-154) 01-14-80 Section III, Division 1, Class 1, 2 and 3 Valves 1796 01-14-77 Body Neck Thickness Determination for Valves with (N-159) 07-01-78 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 Low Alloy and Carbon Steel 01-01-78 Bare Rod Electrodes, Sections I, II, III, IV, V, VIII, and IX 1812 03-23-77 Size of Fillet Welds for Socket Welding of Piping, (N-174) 01-07-80 Section III, Division 1 01-01-81 1818 03-23-77 Welded Joints in Component Standard Supports, (N-175) 07-01-79 Section III, Division 1 Code Case 1818 was acceptable subject to the following condition in '

addition to those conditions specified in the Code Case: That portion of the unwelded housing that is limited to 90* maximum should include a minimum of two sectors that are uniform in length.

N-179 07-11-77 Openings in Valves for Section III, Division 1, 07-11-80 Class 1, 2 and 3 Construction 18

1 N-182 07-11-77 Alternate Rules for Procedure Qualification Base 07-01-81 Material Orientation,Section III, Division 1, Class 2 l and 3 Construction l N-184 07-11-77 Roll Threading of SA-453 Bolting for Section III, 07-01-79 Division 1, Class 1, 2, 3 or CS Construction N-189 08-29-77 Primary Membrane Plus Primary Bending Stress 07-01-79 Intensity Limits for Other Than Solid Rectangular Sections for Section III, Division 1, Class MC Construction N-193 11-21-77 Use of SB-61 and SB-62 Bronze for Section III, 11-21-80 Division 1, Class 3 Flange and Socket Weld End Valves N-196-1 01-08-79 Exemption from the Shakedown Requirements When 01-21-82 Plastic Analysis is Performed for Section III, 01-21-85 Division 1, Class 1 and CS Construction 01-21-88 12-03-90 07-01-92 N-199 03-20-78 Intervening Elements,Section III, Division 1, 01-01-81 Classes 1, 2, 3 and MC Component Construction Code Case N-199 was acceptable subject to the followir<g condition in addition to those conditions specified in the Code Case: The applicant 9 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.

1693 03-20-78 Welding Procedure Qualification of Dissimilar Metal (N-212) 01-01-81 Welds When " Buttering" with Alloy Weld Metal and Heat Treatment May Be Involved,Section III, Division 1, and Section IX N-214-2 05-25-83 Use of SA-351 Grade CN7M, for Valves,Section III, 12-31-83 Division 1 N-215" 05-15-78 Integrally Finned Titanium Tubes,Section III, 05-15-81 Division 1, Class 3 Construction N-217-1 01-07-80 Postweld Heat Treatment of Weld Deposit Cladding on 09-07-82 Classes 1, 2, 3, MC, and CS Items,Section III, 12-05-84 Division 1 09-05-85 02-23-87 N-220 08-28-78 Code Effective Date for Component Supports, 07-13-81 Section III, Division 1 07-13-84

/' \ _ _

r V

" Code 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.

19

N-226 11-20-78 Temporary Attachment of Thermocouples,Section III, 01-01-80 Division 1, Class 1, 2 and 3 Component Construction N-228 03-19-79 Alternate Rules for Sequence of Completion of Code Data 03-19-82 Report Forms and Stamping for Section III, Class 1, 2, 3 and MC Construction N-229 01-08-79 Alternate Rules for Fabrication Welding 58-148 Alloy 01-21-82 CDA 954 for Section III, Division 1, Class 3 01-21-85 Construction 01-21-88 N-233 01-08-79 Alternate Rules for PWHT of P-No. 6, Group 4 Material 01-21-82 for Section III, Division 1, Class 1, 2, or 3 09-17-84 Construction 09-17-87 N-237-2 05-25-83 Hydrostatic Testing of Internal Piping,Section III, 07-30-86 Division 1, Classes 2 and 3 12-07-87 07-01-88 N-238 05-14-79 High Temperature Furnace Brazing of Seat Rings in 01-01-82 Valve Bodies or Bonnets for Section III, Division 1, Class 1, 2, and 3 Valves Code Case N-238 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: 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.

N-247 07-09-79 Certified Design Report Summary for Component Stan-01-21-82 dard Supports,Section III, Division 1, Class 1, 01-21-85 2, 3 and MC 01-21-88 03-14-91 04-30-93 N-252 11-19-79 Low Energy Capacitive Discharge Welding Method for 07-01-82 Temporary or Permanent Attachments to Components and Supports,Section III, Division 1, and XI Code Case N-252 was acceptable subje .t to the following conditions in addition to those conditions specified in the Code Case: 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 12-05-85 Weld Repair of SA-182 Type 316 Forgings,Section III,

, 12-05-88 Division 1, Classes 1, 2, 3, and MC t

20 l

Code Case N-260-2 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: Type 308 L I welding materials should not be used to repair grade F 316 N forgings because of the difference in strength levels.

N-261 05-15-80 Weld Procedure Qualification for Materials with Impact 12-13-82 Requirements for Section III, Division 1, Class 3 Construction N-262 01-07-80 Electric Resistance Spat Welding for Structural Use in 09-07-82 Component Supports,Section III, Division 1 09-05-85 07-27-88 03-14-91 07-27-91 N-263 03-17-80 Alternate Thread Forms, Series and Fits for Component 03-17-83 Supports,Section III, Division 1 Code Case N-263 was acceptable subject to the following conditions in addition to those conditions specified 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 design will withstand maximum conditions of loading with the worst combination of thread tolerance.

N-271 03-17-80 Simplified Method for Analyzing Flat Face Flanges with

} 02-14-86 Metal to Metal Contact Outside the Bolt Circle for Section III, Class 2, 3, and MC Construction N-272 05-15-80 Compiling Data Report Forms,Section III, Division 1 01-01-82 N-275 05-15-80 Repair of Welds,Section III, Division 1 12-07-82 12-31-83 Code Case N-275 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: Use of the Ci;(o 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.

N-276 03-17-80 Welding of SA-358 Pipe,Section III, Division 1 02-14-83 02-14-86 N-279 05-15-80 Use of Torquing as a Locking Device for Section III, 07-13-81 Division 1, Class 1, 2, 3, and MC Component Supports l

l 21

Code Case N-279 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: 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-280 05-15-80 Alternate Rules for Examination of Welds in 07-01-81 Section III, Class 3 Storage Tanks N-281 05-15-80 Welding Operator Performance Qualification, 07-01-81 Section III, Division 1 N-282 05-15-80 Nameplates for Valves,Section III, Division 1, 05-25-83 Class 1, 2, and 3 Construction l

07-30-86 07-30-89 N-300 11-17-80 Pressure-Temperature Ratings, Hydrostatic Tests,  !

12-01-83 and Minimum Wall Thickness of Valves,Section III, I Division 1, Class 1 i l

N-302 03-16-81 Tack Welding,Section III, Division 1, Construction l 11-28-83 N-309 05-11-81 Identification of Materials for Component Supports, 05-11-84 Section III, Division 1 l

N-314 05-11-81 Alternate Rules for Thread Engagement,Section III, '

05-11-84 Division 1 Code Case N-314 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 minimum length of thread engagement and (2) the procedure used to establish thread engagement.

N-316 12-11-81 Alternate Rules for Fillet Weld Dimensions for Socket 09-17-84 Welded Fittings,Section III, Division 1, 09-17-87 Class 1, 2, and 3 I 08-14-90 08-14-93 i

N-320 07-13-81 Alternate PWHT for SA-487, Grade CA6NM,Section III, 12-31-83 Division 1 N-328 12-11-81 Thermit Brazing or Welding of Nonstructural 09-17-84 Attachments,Section III, Division 1 09-17-87 i

N-336 06-17-82 Examination of Welds Inaccessible During Pressure 06-30-83 Test,Section III, Division 1, Class MC 4

N-339 06-17-82 09-17-84 Examination of Ends of Fillet Welds,Section III, Division 1, Classes 1, 2, and MC 9 i 22

N-341 06-17-82 Certification of Level III NDE Examiner,Section III, 05-19-85 Division 1 and 2 02-23-87 07-01-88 N-346 06-17-82 Explosive Welding,Section III, Division 1 05-19-85 06-30-86 N-347 12-07-82 Continuous Electric Resistance Seam Welding of 12-13-85 P-No. 8 Materials for Component Supports,Section III, Division 1 N-349 07-16-82 Pressure Testing Piping Systems,Section III, 12-31-85 Division 1, Classes 2 and 3 N-350 12-07-82 09-05-85 PostweldIII, Section Heat Treatment Division 1 -- Thickness of Material.

Code Case N-350 was acceptable subject to the following condition in addition to those conditions specified 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 required material properties.

N-357 12-13-82 Certification of Material for Component Supports, 05-19-85 Section III, Division 1, Subsection NF 07-01-88 N-359 12-13-82 Weld Connection for Coaxial Cylinders,Section III, 12-31-84 Division 1, Class 1 N-362-2 07-12-84 Pressure Testing of Containment Items,Section III, 04-05-87 Division 1, Classes 1, 2, and MC 07-27-87 07-01-88 N-376 05-25-83 Pressure Testing of Embedded Class 2 and 3 Piping, 07-30-86 Section III, Division 1 N-377 04-04-83 12-31-83 Effective Throat Thickness of Partial Penetration Groove Welds,Section III, Division 1, Classes 1, 2, and 3 N-383-1 07-18-85 Weld Repair of SA-182 Austenitic Forgings, 1 09-05-85 Section III, Division 1, Classes 1, 2, and 3 Code Case N-383-1 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: Applicants who apply the provisions 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.

23

N-397 02-20-84 Alternative Rules to the Spectral Broadening 02-20-87 Procedures of N-1226.3 for C1 asses 1, 2, and 3 Piping,Section III, Division 1 Code Case N-397 was acceptable subject to the following condition in addition to those conditions specified 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, " Development of Floor Design Response Spectra for Seismic Design of Floor-Supported Equipment or Components."

N-412 04-15-85 Alternative Rules for Witnessing the Piping System )

04-15-88 Pressure Tests of Classes 1, 2, and 3 Piping Systems, 04-15-91 Section III, Division 1 N-413 02-14-85 Minimum Size of Fillet Welds for Subsection NF Linear 02-14-88 Type Supports,Section III, Division 1 N-414 02-20-86 Tack Welds for Class 1, 2, 3 and MC Components and 1 02-20-89 Piping Supports,Section III, Division 1 02-20-92 N-421 02-14-85 Brazing Using a Radiant Energy Source,Section III, 05-19-85 Division 1 06-30-86 N-430 02-28-86 Alternative Requirements for Welding Workmanship 02-28-89 and Visual Acceptance Criteria for Class 1, 2, 3 02-05-92 and MC Linear-Type and Standard 07-01-93 Supports,Section III, Division 1 Code Case N-430 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: (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 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 1977 Addendum to ANSI /ASME PTC 25.3-1976, Safety 04-30-90 and Safety Relief Valves, Class 1, 2, 3, and MC, 03-08-92 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 revised 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 O

24

revised version of the Code Cases. These Code Cases th

) are listed in the following by number, effective dates,gt are notitle.

and longer endorsed 1508 12-13-71 Allowable Stresses, Design Intensity and/or Yield 06-30-75 Strength Values,Section I, III, and VIII, Divisions 1 and 2 1516-1 06-25-73 Welding of Seats in Valves for Section III 08-11-75 Applications 1539 11-06-72 Metal Bellows and Metal Diaphragm Stem Sealed Valves, (N-30-1) 11-21-77 Section III, Classes 1, 2, and 3 1540-1 03-03-73 Elastomer Diaphragm Valves,Section III, 01-14-77 Classes 2 and 3 1540-2 01-14-77 Elastomer Diaphragm Valves,Section III, Class 2 and 3 (N-31) 01-07-80 02-14-83 07-18-85 Code Case 1540-2 (N-31) 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 diaphragm should not exceed the manufacturer's recommended service life. This I

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.

1541-1 08-13-73 Hydrostatic Testing of Embedded Class 2 and Class 3 09-30-76 Piping for Section III Construction 1541-2 09-30-76 Hydrostatic Testing of Embedded Class 2 and Class 3 05-15-78 Piping for Section III, Division 1 Construction 1552 12-18-72 Design by Analysis of Section III, Class 1 Valves 08-29-77 1553 12-18-72 Upset Heading and Roll Threading of SA-453 for Bolting, 03-03-75 Section III 1555 12-18-72 Certification of Safety Relief Valves on Liquids 01-14-77

" Earlier date-date Code Case was approved by ASME; later dates--date revision of Code Case was approved by ASME.

}

" Code Case 1508 is no longer listed by ASME as a Section !!! Code Case and is therefore deleted from the acceptable itsting.

, 25

1606 11-05-73 Stress Criteria for Section III, Class 2 and 3 Piping 12-16-74 Subjected to Upset, Emergency, and Faulted Operating Conditions 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.

160' 11-05-73 Stress Criteria for Section III, Classes 2 and 3 Vessels 11-04-74 Subjected to Upset, Emergency, and Faulted Operating Conditions 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 I should be established and justified in the design specifications.

l j 1609-1 03-01-76 Inertia and Continuous Drive Friction Welding, (N-55) 08-28-78 Section I, III, IV, VIII, Division 1 and 07-13-81 2, and IX 04-05-84 1621-2 05-25-77 Internal and External Valve Items,Section III, (N-62-2) 05-15-80 Division 1, Class 1, 2 and 3 Line Valves 05-25-83 07-18-85

, Code Case 1621-2 (N-62-2) was acceptable subject to the folicwing l condition in addition to those conditions 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 Items,Section III, 09-05-85 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 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-62-4 09-05-85 Internal and External Valve Items,Section III, 07-27-88 Division 1, Class 1, 2 and 3 07-24-89 Code Case N-62-4 was acceptable subject to the following condition in addition to those conditions 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.

26

N-62-5 07-24-89 Internal and External Valve Items,Section III,

) 12-11-89 Division 1, Class 1, 2 and 3 Code Case N-62-5 was acceptable subject to the following condition in addition to those conditions 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-62-6 12-11-89 Internal and External Valve Items,Section III 12-11-92 Division 1, Class 1, 2 and 3 05-11-94 Code Case N-62-6 was acceptable subject to the following condition in addition to those conditions 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 in the provisions of NCA 4000.

1630 11-04-74 External Pressure Charts for High Yield Strength Carbon (N-77) 07-10-78 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 Bolt Holes for Section III, Division 1, Class 1, 2, 3 03-01-76 and MC Component Supports I 1689 06-30-75 Alternate PWHT Time and Temperature for SA-182 09-10-76 Grade F22,Section III, Class 1, 2, 3 and CS Code Case 1689 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 welding 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 Vacuum Relief Valves, 03-20-78 Section III, Class MC 1701-1 03-20-78 Determination of Capacities of Vacuum Relief (N-95-1) 03-19-79 Valves,Section III, Division 1 and 2, Class MC 07-09-79 1702 06-30-75 Flanged Valves Larger than 24 inches for Section III, 07-11-77 Class 1, 2 and 3 Construction 1720 08-11-75 Weld End Preparation for Section III, Division 1 03-01-76 Construction Code Case 1720 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: Weld end

[ preparations other than those shown in Figures 1, 2, and 3 of the Code Case 27

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 Section III, Division 1 11-20-78 Construction Code Case 1720-1 was acceptable subject to the following condition in i

addition to those conditions specified in the Code Case: The acceptance of l 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 III, Division 1, (N-119-2) 08-25-00 Class 1, 2, and 3 1739-3 08-25-80 Pump Internal Items,Section III, Division 1, l (N-119-3) 12-01-80 Class 1, 2, and 3 1739-4 12-01-80 Pump Internal Items,Section III, Division 1, 02-20-84" Class 1, 2, and 3 l (N-119-4) 07-18-85 l N-119-5 07-18-85 Pump Internal Items,Section III, Division 1, 09-05-85 Class.1, 2, and 3 l

l 1745 03-01-76 Stress Indices for Struct6ral Attachments, Class 1, (N-122) 01-08-79 Section III, Division 1 01-21-82 01-21-85 01-21-88 07-24-89 1761 04-26-76 Use of SB-148 Alloy CA954 for Section III, Division 1, 01-14-77 Class 2 or 3 Flanged End Valves 1761-1 01-14-77 Use of SB-148 Alloy CA954,Section III, Division 1, (N-133) 01-07-80 Class 3 04-02-82 N-133-1 04-02-82 Use of SB-148 Alloys 952 and 954,Section III, 05-19-85 Division 1, Class 3 N-133-2 05-19-85 Use of SB-148 Alloys 952 and 954 Section III, 07-18-85 Division 1, Class 3 1769 08-13-76 Qualification of NDE Level III Personnel, 02-16-77 Section III, Division 1 1774 08-13-76 Minimum Wall Thickness for Class 2 and 3 Valves, 07-11-77 Section III, Division 1 j

1780 09-10-76 Hydrostatic Testing and Stamping of Pumps for l

03-10-78 Class 1 Construction,Section III, Division 1 t

Code Case 1780 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: Each licensing 28

l l

D 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 reaction loadings be simulated in the hydrostatic testing.

] 1783 09-10-76 Qualification of Nondestructive Personnel, 01-14-77 Section III, Division 1 Code Case 1783 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: 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."

I 1791 03-17-80'8 Projection Resistance Welding of Valve Seats, (N-154) 09-09-82 Section III, Division 1, Class 1, 2 and 3 Valves 09-05-85 12-05-85 1797 03-23-77 Finned Tubing for Construction,Section III, (N-160) 03-17-80 Division 1 09-07-82 07-18-85 N-192 01-09-78 Use of Flexible Hose for Section III, Division 1, 08-30-79 Class 1, 2, and 3 Construction Code Case N-192 was acceptable subject to the following conditions in addition to those conditions specified 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 required to be furnished with the application.

N-192-1 08-30-79 Use of Flexible Hose for Section III, Division 1, 09-16-81 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 ap should indicate system application, design and operating pressure, andplicant pressure-temperature rating of the flexible hose. Data to demonstrate "The Code Case was annulled on January 14,1980 (ASME mandatory annulment date). It was reinstated on March 17, 1980. Because of the circumstances and because there were no changes in the Code Case, the NRC considers that this Case was in ef fect during the period of 1-14-80 through 3-17-80.

29

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 Shakedown Requirements When Plastic 01-08-79 Analysis is Performed for Section III, Division 1, Class 1 Construction N-214 05-15-78 Use of SA-351, Grade CN7M, for Valves for 17-13-81 Section III, Division 1, Construction 09-07-82 N-214-1 09-07-82 Use of SA-351 Grade CN7H, for Valves,Section III, 05-25-83 Division 1 N-237 07-09-79 Hydrostatic Testing of Internal Piping,Section III, 01-21-82 Division 1 09-07-82 N-237-1 09-07-82 Hydrostatic Testing of Internal Piping,Section III, 05-25-83 Division 1, Classes 2 and 3 N-260 01-07-80 Weld Repair of SA-182 Type 316 Forgings,Section III, 05-25-83 Division 1, Classes 1, 2, 3, and MC 07-18-85 N-260-1 07-18-85 Weld Repair of SA-182 Type 316 Forgings,Section III, 12-05-85 Division 1, Classes 1, 2, 3,and MC Code Case N-260-1 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: Type 308 L welding materials should not be used to repair grade F 316 N forgings because of the difference in strength levels.

N-304 06-11-81 Use of 20Cr-25Ni-6Mo (Alloy UNS N08366) Welded Tubes 04-05-84 for Section III, Division 1, Classes 2 and 3 07-12-84 Construction N-304-1 07-12-84 Use of 20Cr-25Ni-6Mo (Alloy UNS N08366) Welded Tubes 05-19-85 for Section III, Division 1, Classes 2 and 3 Construction N-304-2 05-19-85 Use ',f SB-676 20Cr-25Ni-6Mo (Alloy UNS N08366) 12-05-85 We'ded Tubes,Section III, Division 1, Classes 2 and 3 N-304-3 12-05-85 Use of SB-676 20Cr-25Ni-6Mo (Alloy UNS N08366) Plate, 02-23-87 Sheet, Strip and Welded Pipes,Section III, Division 1, Classes 2 and 3 N-309 09-17-84" Identification of Materials for Component Supports, 12-05-85 Section III, Division 1 "The Code Case was annulled on May 11,1984 (ASME mandatory annulment 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.

30

N-318 07-13-81 Procedure for Evaluation of the Design of Rectangular

} 02-20-84 Cross Section Attachments on Class 2 or 3 Piping,Section III, Division 1 Code Case N-318 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.

20 N-318-1 02-20-84 Procedure for Evaluation of the Design of Rectangular 07-12-84 Cross Section Attachments on Class 2 or 3 Piping,Section III, Division 1 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 Design of Rectangular 09-05-85 Cross Section Attachments on Class 2 or 3 Piping,Section III, Division 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 I attachment, (2) the piping system involved, and (3) the location in the system where the Case is to be applied.

[1-318-3 09-05-85 Procedure for Evaluation of the Design of Rectangular 07-27-88 Cross Section Attachments on Class 2 or 3 Piping, 12-11-89 Section III, Division 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 Design of Rectangular 12-11-92 Cross Section Attachments on Class 2 or 3 Piping, 04-28-94 Section III, Division 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.

D "The conditional acceptance was inadvertently omitted in Revision 23 of this guide.

31

N-319 07-13-81 Alternate Procedure for Evaluation of Stresses in Butt 07-13-84 Weld Elbows in Class 1 Piping,Section III, Division 1 07-13-87 97-24-89 N-319-1 07-24-09 Alternate Procedure for Evaluation of Stresses in Butt 08-14-90 Weld Elbows in Class 1 Piping,Section III, Division 1 N-345 06-17-82 Attachment of AMS 5382 Alloy 31 Seat Ri gs by Friction 12-13-82 Welding,Section III, Division 1, Classes 1, 2, and 3 N-362 02-14-83 Alternate Rules for Pressure Testing of Containment 05-25-83 Items,Section III, Division 1 N-362-1 05-25-83 Pressure Testing of Containment Items,Section III, 07-12-84 Division 1, Classes 1, 2, and MC N-383 10-05-83 Weld Repair of SA-182 Austenitic Forgings, 07-18-85 Section III, Division 1, Classes 1, 2, and 3 Code Case N-383 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: Applicants who apply the provisions 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 applicationr., including their evaluation of the susceptibility for stress corrosion cracking.

N-391 11-28-83 Procedure for Evaluation of the Design of Hollow 07-30-86 Circular Cross Section Welded Attachments on Class 1 07-24-89 Piping,Section III, Division 1 N-392 11-28-83 Procedure for Evaluation of the Design of Hollow 07-30-86 Circular Cross Section Welded Attachments on 07-30-89 Classes 2 and 3 Piping,Section III, Division 1 12-11-89 N-392-1 12-11-89 Procedure for Evaluation of the Design of Hollow Circular 12-11-92 Cross Section Welded Attachments on Classes 2 and 3 Piping,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 for Seismic Analysis of 02-20-86 Classes 1, 2, and 3 Piping Sections,Section III, Division 1 Code Case N-411 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: (1) The damping values specified may be used in analyzing piping response for seismic and other dynamic loads being filtered through building structures provided 32

response mode frequencies are limited to 33 Hz and below. Within this I 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 Vt. lues for Seismic Design of Nuclear Power '/lants," 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 accept ance -- 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-453 12-07-87 Nickel-Chromium-Molybdenum-Copper Stainless Steel 11-30-88 (UNS N08925) Welded Pipe for Class 2 and 3 Construction,Section III, Division 1 N-453-1 11-30-88 Nickel-Chromium-Molybdanum-Copper Stainless Steel 12-16-91 (UNS N08925) Seamless and Welded Pipe for Class 2 and 04-30-92 3 Construction,Section III, Division 1 N-454 12-07-87 Nickel-Chromium-Molybden~- Copper Stainless Steel 12-03-90 (UNS N03925) Wrought Fit '.ings for Class 2 and 3 04-30-92 Construction Section III, Division 1 N-455 12-07-87 Nickel-Chromium' Molybdenum-Copper Stainless Steel 12-03-90 (UNS N08925) Forged Flanges and Fittings for Class 2 04-30-92 and 3 Construction Section III, Division 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 I 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 information to applicants regarding the use of this regulatory guide.

33

This draft guide has been released to encourage public participation in its development. The final version of this Revision 31, reflecting public comments, ,

will address the ASME Code Cases as follows.

1

1. Except for those Code Cases that have been annulled by action of the ASME, l

the NRC staff will find the Code Cases listed in the final version of this regulatory guide under Regulatory Position 1 acceptable for appropriste use. Other Code Cases may be considered for use in accordance with footnote 6 of the Codes and Standards rule, S 50.55a of 10 CFR Part 50.

2. Components ordered to a specific version of a Code Case need not be changed because a subsequent revision to the Code Case is listed as the approved version in this guide.

3. Components ordered to a Code Case that was previously approved for use need not be changed because the Code Case.has been subsequently annulled.

4. Code Cases on the approved list may be applied to components that were in process of construction prior to the effective date of the Code Case within the limits specified in the Code Case and applicable regulations or recommended in other regulatory guides.

O 34

APPENDIX NUMERICAL LISTING OF CODE CASES N-62-7 N-309-1 N-411-1 N-122-2 N-313 N-420 N-133-3 N-315 N-433 N-154-1 N-452 l N-318-5 N-155-2(1792-2) N-345-1 N-453-1 N-160-1 N-368 N-454 N-192-2 N-369 N-455 N-240 N-391-1 N-464

. N-241 N-392-2 N-476 N-243 N-393 N-505 N-284 N-394 N-511 I N-292 N-395 N-520 N-304-4 N-410 0

35

VALUE/ IMPACT STATEMENT

1. PROPOSED ACTION 1.1 Description i

Regulatory Guide 1.84, " Design and Fabrication Code Case Acceptability, ASME Section III, Division 1," is being revised to reflect the current NRC acceptance of the Code Cases of the American Society of Mechanical Engineers (ASME). Code Cases are periodically published by ASME to either clarify the intent of existing code rules or to provide, when the need is urgent, rules for materials or construction not covered by existing Code Rules. These Code Cases require approval by the ASME's Main Committee and the Board of Nuclear Codes and Standards prior to their acceptance by the ASME. Use of these nonmandatory Code Cases is subject to general acceptance by the NRC staff, and the accepted Code Cases are then incorporated into Regulatory Guide 1.84. Pursuant to 10 CFR 50.55a, other Code Cases may be used provided specific NRC authorization is obtained on a case-by-case basis.

1.2 Ettd This Revision 31 of Regulatory Guide 1.84 is needed to present the NRC's current position on the ASME Code Cases that have been added, revised, reinstated, reaffirmed, or annulled since Revision 30 was issued.

1.3 Value/ Impact 1.3.1 H&G The guide presents the NRC position on all acceptable and previously acceptable ASME Code Cases. From this document, the NRC reviewing staff can ascertain the NRC position on all Code Cases. Otherwise, the staff would be required to review all applications for use of a Code Case on an individual basis. Using this guide for review greatly reduces the cost and time to the staff.

O 36

l 1.3.2 Industry The guide informs the industry of the NRC position on all acceptable and previously acceptable ASME Code Cases. The guide states which Code Cases are acceptable to the NRC and which cases must be accepted on a case-by-case basis. This Regulatory Guide 1.84 greatly reduces time and effort for the industry.

1.3.3 Public The public has access to a published document that states the NRC position on all acceptable and previously acceptable ASME Code Cases.

2. STATUTORY CONSIDERATION l

Authority for the proposed action is derived from the Atomic Energy Act of 1954, as amended, and the Energy Reorganization Act of 1974, as amended and implemented through the Commission's regulations cited in the introduction to the guide.

3.

SUMMARY

AND CONCLUSION The proposed regulatory guide should be issued for public comment.

37

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