Regulatory Guide 1.84

Code Case Acceptability ASME Section Iii Design and Fabrication

ML13350A351
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Issue date:	06/30/1974
From:	US Atomic Energy Commission (AEC)
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RG-1.084
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June 1974 0 U.S. ATOMIC ENERGY COMMISSION

REGULATORY

DIRECTORATE

OF REGULATORY

STANDARDS REGULATORY

GUIDE 1.84 CODE CASE ACCEPTABILITY

ASME SECTION III DESIGN AND FABRICATION

GUIDE

A. INTRODUCTION

Section 50.55a, "Codes and Standards," of 10 CFR Part 50, "Ucensing of Production and Utilization Facilities," requires, in part, that components of the reactor coolant pressure boundary be designed, fabri-cated, erected, and tested in accordance with the requirements for Class I components of Section III,"Nuclear Power Plant Components,"i of the American Society of Mechanical Engineeri (ASME) Boiler and Pressure Vessel Code or equivalent quality standards.

Footnote 6 to Section 50.55a states that the use of specific Code Cases may be authorized by the Commis-sion upon request pursuant to §50.55a(a)(2Xii)

which requires that proposed alternatives to the described requirements or portions thereof provide an acceptable level of quality and safety. General De--ign Criterion

1,"Quality Standards and Records," of Appendix A,"General Design Criteria for Nuclear Power Plants," to 10 CFR Part 50 requires, in part, that structures, systems, and components important to safety be de-signed, fabricated, erected, and tested to quality stand-ards commensurate with the importance of the safety.function to be performed.

Where generally recognized codes and standards are .used, Criterion I requires that* they be identified and evaluated to determine their applicability, adequacy, and sufficiency and be supple-mented or modified as necessary to assure a quality product in keeping with the required safety function.

30, "Quality of Reactor Coolant Pressure Boundary," of the same appendix requires, in part, that components which are part of the reactor coolant pressure boundary be designed, fabricated, erected, and ICopies may be obtained from the American Society of Mechanical Engineers, United Enginecering Center, 345 East 47th Street, New York, N.Y. 10017.tested to the highest quality standards practical.

Ap-pendix 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 which are generally acceptable to the AEC Regulatory staff for implementation in the licensing of light-water-cooled nuclear power plants.

B. DISCUSSION

The Boiler and Pressure Vessel Committee of the ASME publishes documents entitled "Interpretations of the ASME Boiler and Pressure Vessel Code." t These documents, referred to as "Code Cases," explain the intent of Code rules or provide Code permission to use alternative requirements under special circumstances or with suitable precautions.

Most Code Cases are even-tually superseded by revision to the Code and then are annulled by action of the ASME Council.The Code Cases listed in this guide are limited strictly to those applicable to Section III which are oriented toward design and fabrication.

All published Code Cases in the area of design and fabrication which are applicable .to Section III of the Code and were in effect on November 5, 1973 were reviewed for inclusion in this guide. Code Cases which are not listed herein are either not endorsed 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 USAEC REGULATORY

GUIDES Copies of published guides may be obtained by request indicating the divisions desired to the US. Atomic Energy Commission, Washington.

D.C, 20545.Regulatotyý

Guides are issued to desoibe and make avoilable to the public Attention:

Director of Regulatory Standards.

Comments and suggestions for methods accptable to the AEC Regulatory stoff of Implementing specific pents of improvements In these guides are encouraged and should be sent to the Secretary the Commissioe's regulations, to delineate techniques v,,ed by the staff in of the Commission, US. Atomic Energy Commission, Wtshington, D.C. 20545, evaluating specific prob;ems or postulated accidents, or to provide guidsnce to Attention:

Chief. Public Proceedings Staff.apolicants.

Regulatoty Guides are not substitutes for regulations and compliance with them is not required.

Methods end solutions different from those set out in The guides are issued in th" following ten broad divisions:

the guides will be acceptable If they provide a basis for the findings requisite to the issuance or continuance of a permit or license by the Commission, 1. Power Reachors 6. Products 2. Research end Test Resictoct

7. Transportation

3. Fuets and Materials Fecilities

8. Occupational Health Published guides will be revised periodically, as appropriate, to accommodate

4. Environmental and Siting 9. Antitrust Review comments and to reflect new Information or experience, S. Materials and Plant Protection

10, General 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 C.l.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.The acceptance or endorsement by the Regulatory staff applies only to those Code Cases or Code Case revisions with the date of "Council Approval" as shown in the Regulatory Position of this guide. Earlier or later revisions of a Code Case are not endorsed by this guide.New Code Cases as they are issued or future revisions of existing Code Cases will require evaluation by the Regulatory staff to determine if 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 periodic updating to accommodate new Code Cases and any revisions of existing Code Cases.C. REGULATORY

POSITION 1. The Section III ASME Code Cases 2 listed in the following by number, title, and date of Council approval are a:ceptable to the Regulatory staff for application in the construction of components for water-cooled nu-clear power plants. Their use is acceptable within the limitations stated in the "Inquiry" and "Reply" sections of each individual code case, such Regulatory or other requirements as may exist, and the additional limitations recommended by the Regulatory, staff given with the individual code cases in the list.a. Design-Oriented Code Cases With Title and Date of Council Approval (1) .Code Cases Applicable to Piping Design 1477-1 3-9-72 Use of 1970 Addenda of ANSI B31.7 "Nuclear Power Piping" 1506 12-13-71 Stress Intensification Factors, Section I11, Class 2 & 3 Piping 1601 11-5-73 Limits of Reinforcement for Two-thirds Area,Section III Class 1 1606 11-5-73 Stress Criteria for Section III Classes 2 and 3 Piping Subjected to Upset, Emergency, and Faulted Conditions

1614 11-5-73 Hydrostatic Testing of Piping Prior to or Following the Instal-lation of Spray Nozzles for Sec-tion I11, Classes 1, 2, and 3 Piping Systems 2 These Code Cases are listed numerically in the Appendix to this guide.(2) Code Cases Applicable to Valve Design 1533 6-14-72 Pressure Temperature Ratings of SA-35 1 Grades CF8A, CF3, and CF3M,Section III 1534 11.6-72 Overpressurization of Valves,Section III 1539 11-6-72 Metal Bellows and Metal Dia-phragm Stem Sealed Valves, Sec-tion II, Classes 1, 2, and 3.1540-1 3-3-73 Elastomer Diaphragm Valves Sec-tion i11, Classes 2 and 3 1552 12-18-72 Design by Analysis of Section III Class I Valves 1555 12-18-72 Certification of Safety Relief Valves on Liquids 1573 4-30-73 Vacuum Relief Valves, Section Ill 1574 4-30-73 Hydrostatic Test Pressure for Safety Relief Valves,Section III, Classes 1, 2, and 3 1581 6-25.73 Power-Operated Pressure Relief Valves Section 11I, Class I (3) Other Code Cases Related to Design 1470-2 12-18-72 External Pressure Charts for High-Strength Carbon Steels and for Low-Alloy Steels 1508 12-13-71 Allowable Stresses, Design Stress Intensity, and/or Yield Strength Values of Section 1, II, and VIII, Division I and 2 1536 8-14-72 Closing Seam for Electrical Pene-tration for Section III, Classes 2, 3, and MC 1575 4-30-73 Hub-to-Flange Fillet Radius for Bolted Flanges with Nut Stop 1607 11-5-73 Stress Criteria for Section III, C(lasses 2 and 3 Vessels Subjected to Upset, Emergency, and Faulted Operating Conditions b. Fabrication-Oriented.

Code Cases with Dates of Council Approval (1) Code Cases Related to Welding 1461 3-9-72 Electron Beam Welding, Sections 1, 111, VIII 1471-1 3.9-72 Vacuum Electron Beam Welding of Tube Sheet Joints 1494-1 3-3-73 Weld Procedure Qualification Tests,Section III 1516-1 6-25-73 Welding of Seats in Valves for Section III Applications

1554 3-3-73 Post-weld Heat Treatment of P-number 1 and P-number 12A, Subgroup 1 Longitudinal Welds,Section III Classes 1, 2, and 3 components

1580.1 11-5-73 Figure NB4233-1(a),Section III 1.84-2

(2) Other Code Cases Related to Fabrication

1535-2 4-30-73 Hydrostatic Testing of Section 111 Class I valves 1541-1 8-13.73 Hydrostatic Testing of Embed-ded Class 2 and Class 3 Piping for Section III construction

155I 12-18-72 Upset Heading and Roll Thread-ing ol SA-453 for High-Tempera- ture Bolting,Section III, Classes 1, 2, 3, and MC 1588 8-13-73 Electro-Etching of Section 111 Code Symbols.c. Code Cases with Contingent Approval 1355.3 3-9-72 Electroslag Welding, Section 1, I11, and VIII, Division I and 2 This code case is approved subject to the condi-tions established in Regulatory Guide 1.34, "Con-trol of Electroslag Weld Properties."

D. IMPLEMENTATION

The following guidance is provided for the implemen-tation of Section III ASME Code Cases involving materials and testing.1. The effective date of this guide is July 1, 1974.2. This listing of Code Cases is applicable after the effective date of this guide unless a particular Code Case has been annulled by action of the ASME Council.3. Components ordered to a specific version of a Code Case before the effective date of this guide need not be changed because a subsequent revision to the Code Case is listed as the approved version in this guide.4. Code Cases on the approved list may be applied to components that were in process of construction prior to the effective date of this guide within the limits specified in the Code Case and applicable regulations or recommended in other regulatory guides.5. Code Cases for Class 1 components which are not on the approved list of this guide or other regulatory guides, or for which authorization by the Commission has not been granted, are not acceptable on a generic basis for Class I components.

Special authorization may be granted for individual cases upon special request to the Commission.

6. Code Cases for other Classes of components which are not on the approved list of this guide or other regulatory guides, or for which authorization by the Commission has not been granted, should not be considered acceptable on a generic basis. Specialiauthori.

zation may be granted for individual cases upon special request to the Commission.

1361 3-9-72 Socket Welds,Section III This code case is approved when used in connec-tion with Section Ill, paragraph NB-3356, Fillet Welds.1569 3-3-72 Design of Piping for Pressure Relief Valve Station This code case is approved subject to the condi-tions established in Regulatory Guide 1.67, "In-stallation of Overpressure Devices." 2. Code Cases that are annulled by action of the ASME Council should be considered as deleted from the approved list as of the date of the ASME Council aclion.1.84-3 APPENDIX Numerical Listing of Code Cases 1355-3 1541-1 1361-2 1552 1461-1 1553 1470-2 1554 1.471-1 1555 1477-1 1569 1494-1 1573 1506 1574 1508 1575 1516-1 1580.1 1533 1581 1534 1588 1535.2 1601 1536 1606 1539 1607 1540-1 1614 1.84-4 APPENDIX NUMERICAL

LISTING OF CODE CASES 1361,2 1541-1 1623 14610i 1552 1625 147&.2 1553 1633 1471-I 1555 1635-1 1477,1 1569 1636-1 1494,1 1573 1651 1506 1574 1508 1580-1 1516,1 1581* 1533 1588 1535-2 .1606 1536 1607* 1539 1614 1540.I 1620 1.84-5