Regulatory Guide 1.85

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7, Materials Code Case Acceptability ASME Section Iii Division 1
ML13038A104
Person / Time
Issue date: 11/30/1990
From:
Office of Nuclear Regulatory Research
To:
References
RG-1.085, Rev. 27
Download: ML13038A104 (20)
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U.S. NUCLEAR REGULATORY

COMMISSION

REGULATORY

Revision 27 November 1990 GUIDE OFFICE OF NUCLEAR REGULATORY

RESEARCH REGULATORY

GUIDE 1.B5 MATERIALS

CODE CASE ACCEPTABILITY

ASME SECTION III DIVISION I

A. INTRODUCTION

Section 50.55a, "Codes and Standards," of 10 CFR Part 50, "Domestic Licensing of Production and Utilization Facilities," requires, in part, that com-ponents of the reactor coolant pressure boundary be designed, fabricated, erected, and tested in accor-dance with the requirements for Class 1 components of Section III, "Nuclear Power Plant Components,"'

of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code or equiva-lent quality standards.

Footnote 6 to §50.55a states that the use of specific Code Cases may be authorized by the Commission upon request pursuant to§ 50.55 a (a) (2) (ii), which requires that proposed alter-natives to the described requirements or portions thereof provide an acceptable level of quality and safety.General Design Criterion 1, "Quality Standards and Records," of Appendix A, "General Design Cri-teria for Nuclear Power Plants," to 10 CFR Part 50 requires, in part, that structures, systems, and compo-nents important to safety be designed, fabricated, erected, and tested to quality standards commensu-rate with the importance of the safety function to b(performed.

Where generally recognized codes an standards are used, Criterion

1 requires that they b identified and evaluated to determine their applicabi ity, adequacy, and sufficiency and be supplemente

'Copies may be obtained from the American Society of M chanical Engineers, United Engineering Center, 345 East 41)Street, New York, New York 10017.or modified as necessary to ensure a quality product in keeping with the required safety functio

n. Criterion

30, "Quality of Reactor Coolant Pres-sure Boundary," of the same appendix requires, in part, that components that are part of the reactor coolant pressure boundary be designed, fabricated, erected, and tested to the highest quality standards practical.

Appendix B, "Quality Assurance Criteria for Nu-clear Power Plants and Fuel Reprocessing Plants," to 10 CFR Part 50 requires, in part, that measures be 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 materials and testing that are generally acceptable to the NRC staff for im-plementation in the licensing of light-water-cooled nu-clear power plants.Any information collection activities mentioned in this regulatory guide are contained as requirements in 10 CFR Part 50, which provides the regulatory ba-sis for this guide. The information collection require-ments in 10 CFR Part 50 have been cleared under OMB Clearance No. 3150-0011.

e I-

B. DISCUSSION

d The Boiler and Pressure Vessel Committee of the ASME publishes a document entitled "Code Cases."'le-'th Generally, the individual Code Cases that make up this document explain the intent of Code rules or USNRC REGULATORY

GUIDES Regulatory Guides are issued to describe and make available to the pub-lic methods acceptable to the NRC staff of Implementing specific parts of the Commission's regulations, to delineate techniques used by the staff in evaluating specific problems or postulated accidents, or to pro-vide guidance to applicants.

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

Methods and solutions different from those set out in the guides will be acceptable If they provide a basis for the findings requisite to the issuance or continu-ance of a permit or license by the Commission.

This guide was issued after consideration of comments received from the public. Comments and suggestions for improvements in these guides are encouraged at all times, and guides will be revised, as ap-propriate, to accommodate comments and to reflect new Information or experience.

Written comments may be submitted to the Regulatory Publications Branch, DFIPS, ADM, U.S. Nuclear Regulatory Commission, Washing-ton, DC 20555.The guides are Issued in the following ten broad divisions, 1. Power Reactors 2. Research and Test Reactors 3. Fuels and Materials Facilities

4. Environmental and Siting 5. Materials and Plant Protection

6. Products

7. Transportation

8. Occupational Health g. Antitrust and Financial Review 10. General Copies of issued guides may be purchased from the Government Printing Office at the current GPO price. Information on current GPO prices may be obtained by contacting the Superintendent of Documents, U.S.Government Printing Office, Post Office Box 37082, WashIngton, UC 20013-7082, telephone

(202)275-2060

or (202)275-2171.

Issued guides may also be purchased from the National Technical Infor-mation Service on a standing order basis. Details on this service may be obtained by writing NTIS, 5285 Port Royal Road, Springiield, VA 22161.

provide for alternative requirements under special circumstances.

Most Code Cases are eventually superseded by revision to the Code and then are annulled by action of the ASME. In such cases, the intent of the annulled Code Case becomes part of the revised Code, and therefore continued use of the Code Case intent is sanctioned 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 materials and testing.All published Code Cases in the area of materials and testing that are applicable to Section III of the* JCode and were in effect on March 8, 1989, were 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) Code Cases that were identified as acceptable in a prior version of this regulatory guide and that were superseded by revised Code Cases after the original issuance of this guide (June 1974). Code Cases that are not listed herein are either not 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 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.a 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 position of this guide. Earlier or later revisions of a Code Case are not endorsed by this guide. New Code Cases will require evaluation by the NRC staff to determine if they qualify for inclusion in the approved list. Because of the con-*Lines indicate substantive changes from Revision 26.tinuing 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 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 require-ments as may exist, and within the additional limita-tions recommended by the NRC staff given with the individual Code Cases in the listing. The categoriza- tion 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. Materials-oriented Code Cases (Code Case number, date of ASME approval, 3 and title): (1) Code Cases involving plate: N-7-1 12-13-82 High Yield Strength Steel, 02-20-86 Section III, Division 1, Class 1 Vessels Code Case N-7-1 is acceptable subject to the fol- i .lowing condition in addition to those conditions specified in the Code Case: The information re-quired to be developed by Note 1 in the Code Case should be provided in each referencing Safety Analysis Report.(2) Code Cases involving pipe and tubes: 1474-1 10-29-71 (N-17) 01-08-79 01-21-82 01-21-85 01-21-88 N-20-3 11-30-88 Integrally Finned Tubes for Section III SB- 163 Nickel-Chromium- Iron Tubing (Alloy 600 and 690) and Nickel-Iron- Chromium Alloy 800 at a Specified Minimum Yield Strength of 40.0 Ksi and Cold Worked Alloy 800 at a yield strength of 47.0 Ksi,Section III, Division 1, Class 1 2 A numerical listing of the Code Cases appears in the ap-pendix.3 When more than one dale is given, the earlier date is that on which the Code Case was approved by the ASME, and the later date(s) is that on which the Code Case was reaffirmed by the ASME.1.85-2

1527 06-26-724 Integrally Finned Tubes, Sec-tion III (N-26) 01-08-79 01-21-82 01-21-85 01-21-88 N-188-1 05-15-78 07-13-81 07-13-84 07-13-87 N-224-1 05-11-81 04-05-84 04-05-87 N-294 08-25-80 05-25-83 07-30-86 N-379-1 07-18-85 07-18-88 N-404 04-05-84 04-05-87 1337-11 05-15-78 (N-4-11) 07-13-81 07-13-84 07-13-87 Special Type 403 Modified Forgings or Bars,Section III, Division 1, Class 1 and CS Use of Welded Ni-Fe-Cr-Mo- Cu (Alloy 825) and Ni-Cr-Mo-Cb (Alloy 625) Tubing,Section III, Division 1, Class 2 and 3 Use of ASTM A500 Grade B and ASTM A501 Structural Tubing for Welded Attach-ments for Section III, Class 2, 3, and MC SB-148 Alloy 952 and 954, and SB-62 Alloy 836 Fittings,Section III, Division 1, Class 2 Bimetallic Tubing Section III, Division 1, Class 1 Annealed Alloy UNS N06625 Over UNS N06600 Bimetallic Tubing,Section III, Division 1, Class 1 Code Case N-404 is acceptable subject to the fol-lowing conditions in addition to those conditions specified in the Code Case: The outside layer of the bimetallic tubing should be limited to a mini-mum of 5 percent and to a maximum of 40 per-cent of the wall thickness.

The tolerance on the outside layer of-0.000 to +0.007 wall thickness.

material should not exceed inches of the specified design N-367 02-14-83 SA-372 Type V, Grade 1, 02-19-86 Class B,Section III, Divi-sion 1 N-370-2 12-05-85 Modified SA-705 Grade 12-05-88 XM-13 Forgings,Section III, Division 1 N-469 03-08-89 Martensitic Stainless Steel for Class 1, 2, and 3 Compon-ents,Section III, Division I (4) Code Cases involving general usage: N-60-3 09-05-85 Material for Core Support 07-27-88 Structures,Section III, Divi-sion 1 Code Case N-60-3 is acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Welding of age-hardenable alloy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the mate-rial is in the solution-treated condition.

For SA-479 material, the maximum yield strength should not exceed 90,000 psi in view of the sus-ceptibility of this material to environmental cracking.N-71-15 12-16-86 Additional Materials for Sub-section NF, Classes 1, 2, 3 and MC Component Supports Fabricated by Welding, Sec-tion III, Division 1 Code Case N-71-15 is acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The maximum measured ultimate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materials to brittleness and stress corro-sion cracking.

Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the Design Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the impact test results for the material meet code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience fre-quent sustained loads in service. In the last sentence of paragraph

5.3, reference should be made to paragraph

4.5.2.2, "Alternate Atmos-phere Exposure Time Periods Established by N-418-1 07-30-86 Use of Seamless Ni-Fe-Cr-Mo-Cu Low Carbon (UNS N08028 and UNS N08904)Tubing,Section III, Division 1, Classes 2 and 3 N-439 02-23-87 Use of 20Cr-18Ni-6Mo (Alloy UNS S31254) Forgings, Plate, Seamless and Welded Pipe, and Welded Tube, Class 2 and 3 Construction,Section III, Division 1 N-441 02-23-87 Use of 20Cr-l8Ni-6MNo (Alloy UNS S31254) Fittings, Class 2 and 3 Construction,Section III, Division 1 N-466 03-08-89 Modified 9Cr-iMo Material,Section III, Division 1, Classes 1, 2, and 3 (3) Codes Cases involving bars and forgings: 4 Corrected date.1.85-3 Test," of the AWS D. 1.1 Code for the evidence presented to and accepted by the Authorized In-spector concerning exposure of electrodes for longer periods of tim

e. Paragraph

16.2.2 is not acceptable as written and should be replaced with the following:

When not exempted by 16.2.1, above, the postweld heat treatment shall be performed in accordance with NF-4622 ex-cept that for ASTM A-710 Grade A material, it shall be at least 1000'F (540"C) and shall not.exceed 1150'F (620'C) for Class 1 and Class 2 material and 11750F (640'C) for Class 3 mate-rial. The new holding time at temperature for weld thickness (nominal)

shall be 30 minutes for 1/2 inch or less, 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per inch for thickness over 1/2 inch to 5 inches, and 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> plus 15 minutes for each additional inch over 5 inches.The fracture toughness requirements as listed in this Code Case apply only to piping supports and not to Class 1, 2, and 3 component supports.The fracture toughness of Classes 1, 2, and 3 component supports shall be characterized in ac-cordance with paragraph

5.3.4 of the USNRC Standard Review Plan (NUREG-0800)

or on a case-by-case basis.1759-1 05-15-78 Material for Internal Pressure (N-131-1)

07-13-81 Retaining Items for Pressure 12-11-81 Relief Valves,Section III, 12-05-84 Division 1, Class 1, 2, and 3 12-05-87 Code Case 1759-1 is acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Applicants us-ing this Case should also use Code Case 1711 for the design of pressure relief valves.USNRC Standard Review Plan (NUREG-0800)

or on a case-by-case basis. The following is to be added to paragraph

(5) of the Case: For these cases, it should be demonstrated by the owner that (1) the impact test results for the material meet Code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or as-sembly stresses, and it does not experience fre-quent sustained loads in service.N-265-1 05-19-85 Modified SA-487 Castings, 05-19-88 Section III, Division 1, Class 1 N-337-1 07-18-85 Use of ASTM B525-70 Grade 07-18-88 II, Type II, Sintered Austen-itic Stainless Steel for Class 2, 3, and MC Component Stan-dard Supports,Section III, Division 1 N-348-1 09-07-855 Use of SA-574 Socket Head 02-20-86 Cap Screws,Section III, Divi-sion I Code Case N-348-1 is acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Applicants should justify in their Safety Analysis Reports why use of these socket head cap screws will not result in early failure from stress corrosion cracking.7°,- \.N-205 05-15-78 07-13-81 07-13-84 07-13-87 N-246-2 05-25-83 07-30-86 N-249-9 12-16-86 Use of Ductile Iron SA-395 for Section III, Division 1, Class 3 Construction SB-169, Alloy C61400, Sec-tion III, Division 1, Class 3 Additional Material for Sub-section NF, Classes 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 N-438-1 03-08-89 Fe-24.5Ni-21Cr-6.SMo-0.2N (Alloy UNS N08367) Seam-less and Welded Pipe, Tube, Plate, Bar, Fittings, and Forg-ings, Class 2 and 3 Construc-tion,Section III, Division 1 N-440 02-23-87 Use of 20Cr-18Ni-6Mo (Al-loy UNS J93254) Castings, Class 2 and 3 Construction,Section III, Division 1 N-443-1 03-08-89 High Yield Strength Cr-Mo Steel, Class 1 Components,Section III, Division 1 N-459 05-04-88 SA-508 Basic Oxygen-Ladle Furnace Process for Code Construction,Section III, Di-vision 1 N-470 03-08-89 Class MC Material Require-ments [NE-2121(c)],Section III, Division 1 b. Testing-oriented Code Cases: 5 Code Case N-348 was annulled on 9-7-85. It was rein-stated as N-348-1 on 2-20-86. Because of the circumstances and because there were no changes in the Code Case, the NRC considers that the Code Case was in effect during the period 9-7-85 through 2-20-86.Code Case N-249-9 is acceptable subject to the following conditions in addition to those condi-tions specified in the Code Case: The fracture toughness requirements apply only to piping sup-ports and not to Classes 1, 2, and 3 component supports.

The fracture toughness of Classes 1, 2, and 3 component supports should be character- ized in accordance with paragraph

5.3.4 of the 1.85-4

(1) Code Case involving plates: (2) Code Case involving bars and forgings: N-329 12-11-81 Examination of Bar Material, 12-05-84 Section III, Division 1, Class 1 12-05-87 (3) Code Case involving pipe and tubes: 1407-3 07-01-74 (N-10) 01-08-79 01-21-82 09-17-84 09-17-87 1412-4 11-03-75 01-01-77 Time of Examination for Classes 1, 2, and 3, Sec-tion III Vessels Modified High Yield Strength Steel for Section I1l, Division 1, Class 1 Vessels I 1755-1 01-14-77 (N-127) 01-07-80 02-14-83 02-20-86 Alternative Rules for nation of Welds in Section III, Class 1 Construction Exami-Piping, and 2 (4) Code Case involving general usage: I N-351 07-16-82 05-19-85 05-19-88 Use of Subsize Charpy V-Notch Specimens, Section I11, Division I 2. 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 that were annulled on or after July 1, 1974, are listed in the following by number, effective dates, 6 and title.7.i 1141-1 08-31-61 07-23-76 1332-7 01-08-79 (N-1-7) 07-01-82 1334-3 04-29-74 (N-2) 01-08-79 01-01-81 1335-10 08-28-78 (N-3-10) 08-28-81 09-16-84 Foreign Produced Steel Requirements for Steel Forg-ings,Section III, Division 1 Requirements for Corrosion- Resisting Steel Bars and Shapes,Section III Requirements for Bolting Materials,Section III Code Case 1412-4 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The informa-tion required to be developed by Note 1 in the Code Case should be provided in each referenc-ing Safety Analysis Report. The material given in the Inquiry section of the Code Case should be SA-508, Class 4b, instead of SA-508, Class 4.1414-5 08-29-77 High Yield Strength Cr-Mo (N-11-5) 08-29-80 Steel for Section III, Division 1, Class 1 Vessels Code Case 1414-5 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The informa-tion required to be developed by Note 1 in the Code Case should be provided in each referenc-ing Safety Analysis Report.1423-2 03-09-72 Wrought Type 304 and 316 07-01-77 with Nitrogen Added, Sec-tions I, III, VIII, Division 1 and 2 Code Case 1423-2 was acceptable subject to compliance with the recommendations contained in Regulatory Guides 1.31, "Control of Ferrite Content in Stainless Steel Weld Metal," and 1.44, "Control of the Use of Sensitized Stainless Steel." 1434-1 03-09-72 Postweld Heat Treatment of 01-01-78 SA-487 Class 8N Steel Castings,Section III 1456-2 06-25-73 Substitution of Ultrasonic (N-15) 03-01-79 Examination for Progressive Penetrant or Magnetic Par-ticle Examinations of Partial Penetration and Oblique Nozzle Attachment Welds,Section III 1475-18 03-02-74 Ferritic-Austenitic Stainless 07-01-75 Steel Seamless Tubes for Section III, Class 2 and 3 Construction

1498-1 11-06-72 SA-508-Class

2 and 3, (N-22) 01-08-79 Minimum Tempering Tem-07-01-82 perature,Section III eCode Case was annulled on date as indicated, but the an-nulment was first so indicated in Revision 12 of this guide.N-5-1 12-13-82 Nickel Chromium Age Hard-12-13-85 enable Alloys (Alloy X750),Section III, Division 1, Classes 1, 2, 3, MC, and CS 1345-2 03-09-72 Requirements for Nickel-(N-6) 03-01-79 Molybdenum-Chromium-Iron Alloys,Section III 1395-4 01-08-79 SA-508, Class 2 Forgings with (N-9-4) 07-01-82 Modified Manganese Con-tent,Section III 6 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 reaf-firmation of the Code Case.7Code Cases 1401-1, 1493-1, and 1599, which were listed in the original issue of this guide, were annulled by ASME action prior to July 1, 1974.1.85-5

1515 03-09-72 Ultrasonic Examination of 07-01-77 Ring Forgings for Shell Sections,Section III, Class 1 Vessels 1521-1 04-29-74 Use of H-Grades of SA-240, 01-01-78 SA-479, SA-336, and SA-358,Section III Code Case 1521-1 was acceptable subject to compliance with the recommendations contained in Regulatory Guides 1.31, "Control of Ferrite Content in Stainless Steel Weld Metal," and 1.44, "Control of the Use of Sensitized Stainless Steel." 1528-3 11-03-75 High Strength Steel SA-508, 01-01-78 Class 2 and SA-541, Class 2 Forgings,Section III, Class 1 Components Code Case 1528-3 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The informa-tion required to be developed by Note 1 in the Code Case should be provided in each referenc-ing Safety Analysis Report.15298 1531 1532 1542-1 (N-33)1557-3 (N-37-3)06-29-72 Materials for Instrument Line 07-01-73 Fittings,Section III 08-14-72 Electrical Penetrations, Spe-03-21-77 cial Alloys for Electrical Penetration Seals,Section III 08-14-72 Section III, Class 3 Compo-01-01-78 nents Made of 8 Percent and 9 Percent Nickel Steel 04-29-74 Type 403 Forgings or Bars for 01-08-79 Bolting Material,Section III 01-21-82 01-21-85 01-08-79 Steel Products Refined by 07-01-82 Secondary Remelting,Section III and VIII, Division 1 and 2 03-03-73 Testing Lots of Carbon and 01-01-78 Low Alloy Steel Covered Electrodes,Section III 03-03-73 Testing Lots of Flux Cored 01-01-78 and Fabricated Carbon and Low Alloy Steel Welding Electrodes,Section III 03-03-73 Additional Material for 01-08-79 SA-234 Carbon Steel Fittings, 01-21-82 Section III 15878 08-13-73 SA-508 Class 3 Forgings with 12-31-75 0.4/1.0 Ni for Section III and VIII, Division 2 Construction

1590 08-13-73 Chemical Analysis Variations, 03-21-77 Section III Construction

1602-1 04-29-74 Use of SB-42 Alloy 122, 12-31-74 SB-111 Alloys 122, 715 and 706, SB-171 Alloys 715 and 706 and SB-466 Alloys 706 and 715,Section III, Class 2 and 3 Components

1603 12-17-73 Toughness Tests When Cross-07-01-74 Section Limits Orientation and Location of Specimens 1605 11-05-73 Cr-Ni-Mo-V

Bolting Material 11-20-78 for Section III, Class 1 Com-03-17-80 ponents 1608-1 12-17-73 Use of ASME SB-265, 03-21-77 SB-337, SB-338, SB-348, and SB-381, Grades 1, 2, 3, and 7 Unalloyed Titanium and ASTM B-363 Titanium Weld-ing Fittings,Section III Class 2 and 3 Components

1612 12-17-73 Use of Type 308 Stainless (N-5 6) 07-01-78 Steel Rod and Bar for Section III, Class 1, 2, 3, and CS Construction

1613 12-17-73 Use of SA-372 Class IV Forg-01-01-78 ings,Section III Construction

1615 12-17-73 Use of A587-73,Section III, 01-01-78 Class 3 Construction

16168 12-17-73 Ultrasonic Examination of 07-01-75 Seamless Austenitic Steel Pipe,Section III, Class 1 Construction

16228 03-02-74 PWHT of Repair Welds in 01-01-76 Carbon Steel Castings, Sec-tion III, Class 1, 2, and 3 1625 03-02-74 Repair of Section III Class 2 12-31-74 and 3 Tanks 1626-1 01-08-79 Normalized and Tempered (N-65-1) 01-21-82 1-1/4 Cr Low Alloy Steel 01-21-85 Forgings,Section I and Sec-tion III 1634-2 08-13-76 Use of SB-359 for Section III, (N-68) 07-01-78 Division 1, Class 3 Construc-tion 16379 04-29-74 Effective Date for Compliance

01-01-75 with NA-3700 of Section III 16458 08-12-74 Use of DeLong Diagram for 01-01-76 Calculating the Delta Ferrite Content of Welds in Section III, Class 1, 2, and CS Con-struction GCode Case 1637 has been accepted only on a case-by-case basis.1567 1568 1571 (N-4 1), 01-21-85 1578 06-25-73 (N-43) 01-08-79 07-01-82 1583 06-25-73 03-21-77 SB-167 Nickel-Chromium- Iron (Alloy 600) Pipe or Tube,Section III Use of 80-40 Carbon Steel Castings,Section III 1.85-6

1648 08-12-74 SA-537 Plates for Section III, 07-01-76 Class 1, 2, 3, and MC Com-ponents 16498 08-12-74 Modified SA 453-GR 660 for 01-01-76 Class 1, 2, 3, and CS Con-struction 1650 08-12-74 Use of SA-414 Grade C for 12-31-74 Class 2 and 3 Components,Section III, Division 1 1664 11-04-74 Use of Cr-Ni-Fe-Mo-Cu-Cb

03-21-77 Stabilized Alloy Cb-3 for Section III Class 2 and 3 Construction

1666 11-04-74 Use of SB-12, Alloy 122 for 07-01-75 Section III, Class 2 and 3 Construction

1682-1 08-11-75 Alternate Rules for Material 12-31-75 Manufacturers and Suppliers,Section III, Subarticle NA-3700 16848 03-03-75 A637 Grade 718 for Bolting 01-01-76 Class 1 and 2 Construction

16908 04-28-75 Stock Materials for Section 01-01-77 III Construction,Section III, Division 1 1691 04-28-75 Ultrasonic Examination in 01-01-78 Lieu of Radiography of Repair Welds for Vessels,Section III, Class 1 1698 06-30-754 Waiver of Ultrasonic Transfer (N-92) 11-20-78 Method,Section III, V, and 07-13-81 VIII, Division 1 Code Case 1698 was acceptable subject to the following conditions in addition to those specified in the Code Case: The material from which the basic calibration block is fabricated should be of the same product form, alloy, and heat treatment as the material being examined.

Alloys of equiva-lent P-number grouping may be used for the fabrication of calibration blocks if adjustments to signal height can be made to compensate for sound beam attenuation difference between the calibration block and the material under examination by following the transfer method procedure of T-535.1(d), Article 5,Section V, ASME B&PV Code, 1977 edition.1713 08-11-75 Small Material Items, Section 12-31-75 III, Division 1, Class 1, 2, 3, CS and MC 1714-2 08-28-78 Postweld Heat Treatment of (N-102-2)

07-13-81 P-1 Material,Section III, 06-30-84 Class MC 1722-1 01-08-79 Vacuum, Carbon Deoxidized (N-107-1)

01-08-82 SA-508 Forgings,Section III, Division 1 1724 11-03-75 Deviation from the Specified (N-108) 07-01-78 Silicon Ranges in ASME Material Specifications, Sec-tion III, Division 1, and VIII, Division 1 and 2 1728 11-03-75 Steel Structural Shapes and 07-01-77 Small Material Products for Component Supports,Section III, Division 1 Construction

1740 12-22-75 Weld Metal Test,Section III, 07-01-76 Class 1, 2, 3, MC and CS 1741-1 01-14-77 Interim Rules for the Re-01-01-78 quired Number of Impact Tests for Rolled Shapes, Sec-tion III, Division 1, Subsec-tion NF, Component Supports 1742 03-01-76 Use of SB-75 Annealed 07-01-76 Copper Alloy 122,Section III, Division 1, Class 2 Construction

1743 03-01-76 Use of SB-98 Cu-SiB Rod 07-01-76 CDA651 Section III, Division 1, Class 2 Components

1746 03-01-76 Leak Testing of Seal Welds, (N-123) 03-01-79 Section III, Division 1, Class 1, 2, and 3 Construction

1747 03-01-76 Requirements for Martensitic (N-124) 01-08-79 Stainless Steel Forgings with 07-13-81 13% Chromium and 4%07-13-84 Nickel,Section III, Division 1 07-13-87 1748 03-01-76 (N-125) 07-01-78 1754 01-14-77 (N-126> 01-07-80 12-13-82 02-20-86 12-07-87 07-01-88 Low Carbon Austenitic Stain-less Steel Pipe Welded With Filler Metal,Section III, Divi-sion 1, Construction Hard Surfacing by the Spray-Fuse Method,Section III, Class 1, 2, and 3 Construction

1760 04-26-76 Maximum Dimensions for 01-01-78 Isolated Pores in Welds-Class

1 Components,Section III, Division 1 1766 04-26-76 Testing Requirements for 07-01-77 Welding Materials, Class 1, 2, 3, MC and CS Construction,Section III, Division 1 1767 04-26-76 Examination of Tubular Prod-01-01-77 ucts Without Filler Metal-Class 1 Construction,Section III, Division 1 1770 08-13-76 Testing of Electroslag Wire (N-139) 01-01-79 and Flux for Class 1, 2, 3, MC, and CS Construction,Section III, Division 1 1.85-7

1772 08-13-76 Use of SA-453 Bolts in Serv-(N-140) 08-30-79 ice Below 800°F Without 07-16-82 Stress Rupture Tests, Section 12-31-85 III, Division 1 1773 08-13-76 Use of Other Product Forms 07-01-77 of Materials for Valves, Sec-tion III, Division 1 1777 08-13-76 Use of SA-106, Grade C in 07-01-77 Class MC Construction, Sec-tion III, Division 1 1781 09-10-76 Use of Modified SA-487 (N-147) 07-01-78 Grade CA6NM,Section III, Division 1, Class 1, 2, 3, MC or CS 1782 09-10-76 Use of Copper-Nickel Alloy (N-148) 08-30-79 962 for Castings,Section III, 07-16-82 Division 1, Class 3 Construc-06-30-83 tion 1787 09-10-76 Depth of Weld Repairs for 01-01-78 Forgings,Section III, Division 1, Class 1, 2, 3, MC and CS Construction

1793 01-14-77 Structural Steel Rolled (N-156) 01-07-80 Shapes,Section III, Division 02-14-83 1, Class 2, 3, and MC 02-14-86 1794 01-14-77 Use of Seamless Al-Br, Alloy (N-157) 01-07-80 CDA 614 Pipe,Section III, 01-07-83 Division 1, Class 3 1795 01-14-77 Examination of Weld Repairs (N-158) 07-01-78 in Forgings,Section III, Division 1, Class 1, 2, 3, MC and CS.1798 01-14-77 Use of ASTM A352-75,.01-01-78 Grades LCA and LCC, Sec-tion III, Division 1, Class 1, 2, and 3 1810 03-03-77 Testing Lots of Carbon Steel 03-03-80 Solid, Bare Welding Electrode or Wire,Section III, Division 1, Class 1, 2, 3, MC, and CS 181910 03-23-77 Use of Type XM-19 for 01-01-78 Construction,Section III, Division 1, Class 1, 2, 3 1819-111I1203-23-77 Use of Type XM-19 for (N-176-1)

03-23-80 Construction,Section III, 08-25-80 Division 1, Class 1, 2, and 3 08-25-83 1 0 This Code Case was reaffirmed as Case 1819-1. See regulatory position 2 for the effective dates."Case 1819 (N-176) was annulled December 31, 1977.However, it was later reaffirmed to continue providing rules pertaining to external pressure charts., 2 Code Case N-176-1: The 3-23-80 is an annulment date. This Case was allowed to expire on 3-23-80 because of an administrative error. It was reinstated on 8-25-80 with no technical changes. It is, therefore, considered to be in effect during that lapse in time. The 8-25-83 is the mandatory an-nulment date. The Case did not appear in Revisions

18-21 of this guide because* of the ASME administative error.1820 03-23-77 (N-177) 03-17-80 02-14-83 01-01-84 Alternative Ultrasonic Exami-nation Technique,Section II, Division 1 N-178 05-25-77 Use of ASTM B271, CDA 01-01-80 954, Alloy 9C for Class 3 Construction,Section III, Di-vision 1 N-180 07-11-77 Examination of Springs for 07-01-78 Class 1 Component Standard Supports,Section III, Divi-sion 1 N-181 07-11-77 Steel Castings Refined by the 07-11-80 Argon Decarburization Proc-ess,Section III, Division 1, 1, Construction N-183 07-11-77 Use of Modified SA-182 01-01-80 Grade F22 for Section III, Division 1, Class 1, 2 and 3 Construction N-190 08-29-77 Use of SA-455 for Class 3 07-01-78 Components,Section III,.Division 1 N-204 03-20-78 Use of Modified SA-508, 01-01-81 Class 3, and SA-541, Class 3 for Section III, Division 1, Class 1, 2, and 3 Construction N-206 03-20-78 Use of ASTM B151-75 03-16-81 Copper-Nickel Alloy 706 Rod 06-30-83 and Bar for Section 11, Division 1, Class 3 Construc-tion N-207-1 03-19-79 Use of Modified SA-479 Type 01-21-82 XM-19 for Section III, 01-21-85 Division 1, Class 1, 2, 3, or CS Construction N-223 11-30-78 Requirements for Stainless 11-20-81 Steel Precipitation Hardening,Section III, Division 1, Class MC N-225 11-20-78 Certification and Identifica-

01-01-81 tion of Material for Compo-nent Supports,Section III, Division 1 N-227 07-09-79 Examination of Repair Welds, 07-09-82 Section III, Class 2 and 3 Tanks N-242-1 04-10-80 Materials Certification, Sec-05-06-83 tion III, Division 1, Classes 1, 06-30-84 2, 3, MC, and CS Construc-tion Code Case N-242-1 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Applicants should identify in their *Safety Analysis Reports the components and supports for which the Code 1.85-8 Case is being applied and should. specify the re-spective paragraphs of the Code Case.N-245 07-09-79 Use of ASTM B61-76 and 07-16-82 B62-76 Copper Alloy Castings 07-17-85 for Section III, Division 1, Class 3 Construction N-246 07-09-79 Use of SB-169, Alloy CA 09-07-82 614,Section III, Division 1, Class 3 N-248 08-30-79 Alternative Reference Radio-07-01-80 graphs,Section III, Division 1, Classes 1, 2, 3, MC, and CS Construction N-259 01-07-80 Ni-Cu-Al Bolting Material SB 02-14-83 164 Modified,Section III, 01-01-84 Division 1, Class 3 N-2651 3 01-07-80 Modified SA-487 Castings, 09-01-83 Section III, Division 1, Class 1 12-31-84 05-19-85 N-267 01-07-80 07-01-81 N-274 03-17-80 09-07-82 06-30-86 Double-Wall Radiography,Section III, Division 1, Class 1 and 2 Alternative Rules for Exami-nation of Weld Repairs for Section III, Division 1 Con-struction Code Case N-274 was acceptable subject to the following condition'

4 in addition to those conditions specified in the Code Case. Paragraph 6 should be expanded as follows: The ultrasonic examination procedures shall be proven by actual demonstration, to the satisfaction of the Author-ized Nuclear Inspector, that the procedures are capable of detecting unacceptable cracks accord-ing to Section XI requirements.

N-277 03-17-80 Use of Type XM-19 Austen-09-17-80 itic Stainless Steel for Sec-tion III, Division 1, Class MC Construction N-295 01-15-81 NCA-1140, Materials, Sec-12-11-81 tion III, Division 1 06-30-82'3Code Case N-265 was allowed to expire on 1-7-83 because of an administrative error. It was reinstated on 9-1-83 with no technical changes. The Case is, therefore, considered in effect during that period of time. Again, Code Case N-265 was allowed to expire on 12-31-84 (mandatory annulment date). It was reinstated as N-265-1 on 5-19-85.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 12-31-84 through 5-19-85.'4 The reason for the conditional acceptance of paragraph

6 is to make certain that there is a qualified ultrasonic testing procedure capable of detecting small flaws and differentiating the small flaws from geometric reflectors.

This paragraph does not in any way alter the acceptance criteria as specified in paragraph

3.N-296 11-17-80 Welding Material,Section III, 12-01-83 Division 1 Construction N-298 11-17-80 Examination of Component 12-01-83 Supports,Section III, Division 1, Class 1, 2, 3, and MC N-299-1 07-18-85 Use of Nickel-Chromium-

02-23-87 Molybdenum-Columbium Al-loy 625 Forgings,Section III, Division 1, Class 2 and Class 3 Components N-310-1 08-14-81 Certification of Bolting Mate-07-01-82 rials,Section III, Division 1, Class 1, 2, 3, MC and CS Code Case N-310-1 was acceptable subject to the following conditions in addition to those condi-tions specified in the Code Case: Each applicant who applies the Code Case should indicate in the referencing Safety Analysis Report (1) in what way the bolting does not meet NCA-3800 (or NA-3700), (2) where the bolting will be used in the plant, and (3) how it will be shown that the bolting material properties required by the Equip-ment Support Design Specification are present in the actual bolting material.N-317 07-13-81 ASTM A276 Bar Section III, 07-01-82 Division 1 N-321-1 12-05-85 Use of Modified SA-249, 12-05-88 Grade TP 304,Section III, Division 1, Class 1 N-342 04-02-82 Use of SA-249 and SA-312 04-02-85 Type 317 Stainless Steel,Section III, Division 1, Classes 1, 2, and 3 N-348 09-09-82 Use of SA-574 Socket Head 09-07-85 Cap Screws,Section III,Divi-sion 1 Code Case N-348 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Applicants should justify in their Safety Analysis Reports why use of these socket head cap screws will not result in early failure from stress corrosion cracking.N-352-1 07-18-85 Use of SA-638 Grade 660 06-30-86 Forgings and Bars Below 700'F Without Stress Rupture Tests,Section III, Division I N-353 07-16-82 Marking of SA-354 Grade BD 05-19-85 Bolting,Section III, Divi-09-05-88 sion 1 N-371-1 07-18-85 12CR-1W-1Mo-1/4V

Marten-,07-18-88 sitic Stainless Steel Valve Internals, Section I1l, Divi-sion 1 1.85-9 I N-372 02-14-83 SB-163 Ni-Fe-Cr-Mo-Cu

12-31-83 Alloy 825 (UNS N08825)Tubing,Section III, Division 1 N-378 10-28-83 Examination of Piping Sup-10-28-861Sport Material,Section III, Division 1, Class 1 N-388 07-25-83 Component Support Bolting, 07-30-86 Section III, Division 1, 02-23-87 Classes 2, 3, and MC N-398 02-20-84 Reporting of Charpy-V Notch 02-20-87 Test Results,Section III, Division 1 Code Case N-398 is acceptable subject to the fol-lowing condition in addition to those conditions specified in the Code Case: The Code Case is not acceptable to steam generator or reactor coolant pump supports.

Applicants wishing to use this Code Case should indicate in the Safety Analysis Report the component supports to which the case is applied for review on a case-by-case basis.3. 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 revised version of the Code Cases. These Code Cases that are no longer endorsed are listed in the following by number, effective dates, 1 6 and title.1 7 1332-6 03-09-72 Requirements for Steel Forg-01-08-79 ings,Section III and VIII, Division 2 1335-9 04-29-74 Requirements for Bolting 08-28-78 Materials 1337-9 04-29-74 Special Type 403 Modified 04-28-75 Forgings or Bars,Section III 1337-10 04-28-75 Special Type 403 Modified 05-15-78 Forgings or Bars,Section III 1344-5 04-29-74 Nickel-Chromium, Age-(N-5) 01-08-79 Hardenable Alloys (Alloy 01-21-82 X750),Section III tions specified in the Code Case: The informa-tion required to be developed by Note 1 in the Code Case should be provided in each referenc-ing Safety Analysis Report.1395-3 11-06-72 SA-508, Class 2 Forgings with 01-08-79 Modified Manganese Con-tent,Section III or Section VIII, Division 2 1407-2 06-26-72 Time of Examination for Class 07-01-74 1, 2, and 3,Section III Vessels 1414-3 11-03-75 High Yield Strength Cr-Mo 03-01-76 Steel for Section III, Division 1, Class 1 Vessels Code Case 1414-3 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The informa-tion required to be developed by Note 1 in the Code Case should be provided in each referenc-ing Safety Analysis Report.1414-4 03-01-76 High Yield 'Strength Cr-Mo 08-09-77 Steel for Section III, Division 1, Class 1 Vessels Code Case 1414-4 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The informa-tion required to be developed by Note 1 in the Code Case should be provided in each referenc-ing Safety Analysis Report.1484-1 04-29-74 SB-163 Nickel-Chromium-

11-04-74 Iron Tubing (Alloy 600) at a Specified Minimum Yield Strength of 40.0 Ksi,Section III, Class 1 1484-2 11-04-74 SB-163 Nickel-Chromium-

08-13-76 Iron Tubing (Alloy 600 and 690) at a Specified Minimum Yield Strength of 40.0 Ksi,Section III, Class 1 1484-3 08-13-76 SB-163 Nickel-Chromium-(N-20) 08-30-79 Iron Tubing (Alloy 600 and 07-16-82 690) and Nickel-Iron-

05-19-85 Chromium Alloy 800 at a 09-05-85 Specified Minimum Yield Strength of 40.0 Ksi,Section III, Division 1, Class 1 N-20-1 09-05-85 SB-163 Nickel-Chromium-

12-07-87 Iron Tubing (Alloy 600 and 690) and Nickel-Iron- Chromium Alloy 800 at a Specified Minimum Yield Strength of 40.0 Ksi,Section III, Division 1, Class 1 12-13-.82 1358-5 11-03-75 (N-7) 01-08-79 01-21-82 12-13-82 High Yield Strength Steel,Section III, Division 1, Class 1 Vessels Code Case 1358-5 was acceptable subject to the following condition in addition to those condi-1 5 The annulment date of 12-31-84 that was listed in Revi-sions 24 and 25 was in error. The annulment date should be 10-28-86.1 8 Earlier date-date Code Case was approved by ASME;later date-date revision of Code Case was approved by ASME.1 7 Code Cases 1334-2, 1337-7, 1344-3, 1484, 1521, and 1542, which were listed in the original issue of this guide, were revised by the ASME prior to July 1, 1974.1.85-10

N-20-2 12-07-87 SB-163 Nickel-Chromium-

11-30-88 Iron Tubing (Alloy 600 and 690) and Nickel-Iron- Chromium Alloy 800 at a Specified Minimum Yield Strength of 40.0 Ksi, and Cold Worked Alloy 800 at a Yield Strength of 47.0 Ksi,Section III, Division 1, Class 1 149218 10-29-71 Post Weld Heat Treatment, 03-03-75 Section I, III and VIII, Division 1 and 2 1557-2 12-17-73 Steel Products Refined by 01-08-79 Secondary Remelting 1618 03-02-74 Material for Core Support 03-03-75 Structures--Section III, Sub-section NG Code Case 1618 was acceptable subject to the following conditions in addition to those specified in the Code Case: a. Welding of age-hardenable alloy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the material is in the solution-treated condition.

b. Use of alloy ASTM A-564 Grade 631 is not acceptable on a generic basis.1618-1 03-03-75 Material for Core Support 03-01-76 StructuresSection III, Sub-section NG.Code Case 1618-1 was acceptable subject to the following condition in addition to those specified in the Code Case: Welding of age-hardenable al-loy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the material is in the solution-treated condition.

1618-2 03-01-76 Material for Core Support (N-60) 01-08-79 Structures-Section III, Divi-01-21-82 sion 1, Subsection NG 05-25-83 Code Case 1618-2 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Welding of age-hardenable alloy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the mate-rial is in the solution-treated condition.

N-60-1 05-25-83 Material for Core Support 09-17-84 Structures,Section III, Division 1 Code Case N-60-1 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Welding of age-1 8Code Case 1492 is no longer listed by ASME as a Section III Code Case and is therefore deleted from the acceptable list-ing.hardenable alloy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the mate-rial is in the solution-treated condition.

N-60-2 09-17-84 Material for Core Support 09-05-85 Structures,Section III, Divi-sion 1 Code Case N-60-2 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Welding of age-hardenable alloy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the mate-rial is in the solution-treated condition.

For SA-479 material, the maximum yield strength should not exceed 90,000 psi in view of the sus-ceptibility of this material to environmental cracking.1626 03-02-74 Normalized and Tempered 01-08-79 1-1/4 Cr Low Alloy Steel Forgings, Section 1, Section 1634 07-01-74 08-12-74 1634-1 -08-12-74 08-13-76 1644 08-12-74 04-28-75 III, and Section VIII, Division 1 and 2 Use of SB-359 for Section III, Class 3 Construction Use of SB-359 for Section III, Class 3 Construction Additional Materials for Com-ponent Supports-Section III, Subsection NF, Class 1, 2, 3, and MC Construction Code Case 1644 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The maximum measured ultimate tensile strength of the compo-nent support material should not exceed 170 Ksi.1644-1 04-28-75 Additional Materials for Com-06-30-75 ponent Support-Section III, Subsection NF, Class 1, 2, 3, and MC Construction Code Case 1644-1 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The maximum measured ultimate tensile strength of the compo-nent support material should not exceed 170 Ksi.1644-2 06-30-75 Additional Materials for Com-11-03-75 ponent Supports--Section III, Subsection NF, Class 1, 2, 3 and MC Construction Code Case 1644-2 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: The maxi-mum measured ultimate tensile strength of the component support material should not exceed 170 Ksi.1.85-11

1644-3 11-03-75 Additional Materials for Com-03-01-76 ponent Supports-Section III, Subsection NF, Class 1, 2, 3 and MC Construction Code Case 1644-3 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The maximum measured ultimate tensile strength of the compo-nent support material should not exceed 170 Ksi.1644-4 03-01-76 Additional Materials for Com-08-13-76 ponent Supports and Alter-nate Design Requirements for Bolted Joints,Section III, Division 1, Subsection NF, Class 1, 2, 3 and MC Con-struction Code Case 1644-4 was acceptable subject to the following conditions in addition to those specified in the Code Case: The maximum measured ulti-mate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materi-als to brittleness and stress corrosion cracking.Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the De-sign Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the im-pact test results for the material meet code re-quirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sus-tained loads in service.1644-5 08-13-76 Additional Materials for Com-03-03-77 ponent Supports and Alter-nate Design Requirements for Bolted Joints,Section III, Division 1, Subsection NF, Class 1, 2, 3 and MC Con-struction Code Case 1644-5 was acceptable subject to the following conditions in addition to. those specified in the Code Case: The maximum measured ulti-mate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materi-als to brittleness and stress corrosion cracking.Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the De-sign Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the im-pact test results for the material meet code re-quirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sus-tained loads in service.1644-6 03-03-77 Additional Materials for Com-11-21-77 ponent Supports and Alter-nate Design Requirements for Bolted Joints,Section III, Di-vision 1, Subsection NF, Class 1, 2, 3 and MC Construction Code Case 1644-6 was acceptable subject to the following conditions in addition to those specified in the Code Case: The maximum measured ulti-mate tensile strength (UTS) of the component support material should not exceed 170 .Ksi in view of the susceptibility of high-strength materi-als to brittleness and stress corrosion cracking.Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the De-sign Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the im-pact test results for the material meet code re-quirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sus-tained loads in service.1644-7 11-21-77 Additional Materials for Corn-(N-71-7) 05-15-78 ponent Supports,Section III, Division 1, Subsection NF, Class 1, 2, 3 and MC Compo-nent Supports Code Case 1644-7 was acceptable subject to the following conditions in addition to those specified in the Code Case: The maximum measured ulti-mate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materi-als to brittleness and stress corrosion cracking.Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the De-sign Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the i-pact test results for the material meet code re-quirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that 1.85-12 (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sus-tained loads in service.1644-8 05-15-78 Additional Materials for Corn-(N-71-8) 01-07-80 ponent Supports,Section III, Division 1, Subsection NF, Class 1, 2, 3 and MC Compo-nent Supports Code Case 1644-8 was acceptable subject to the following conditions in addition to those specified in the Code Case: The maximum measured ulti-mate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materi-als to brittleness and stress corrosion cracking.Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the De-sign Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the im-pact test results for the material meet code re-quirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present S... and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sus-tained loads in service.1644-9 01-07-80 Additional Materials for Corn-(N-71-9) 05-11-81 ponent Supports Fabricated by Welding,Section III, Divi-sion 1, Subsection NF, Class 1, 2, 3, and MC Com-ponent Supports Code Case 1644-9 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: In the last sen-tence of paragraph

5.3, reference should be made to paragraph

4.5.2.2, "Alternate Atmos-phere Exposure Time Periods Established by Test," of the AWS D. 1.1 Code for the evidence presented to and accepted by the Authorized In-spector concerning exposure of electrodes for longer periods of time.Code Case N-71-10 was acceptable subject to the following conditions in addition to those condi-tions specified in the Code Case: The maximum measured ultimate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materials to brittleness and stress corro-sion cracking.

Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the Design Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the impact test results for the material meet code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or as-sembly stresses, and it does not experience fre-quent sustained loads in service. In the last sen-tence of paragraph

5.3, reference should be made to paragraph

4.5.2.2, "Alternate Atmos-phere Exposure Time Periods Established by Test," of the AWS D. 1.1 Code for the evidence presented to and accepted by the Authorized In-spector concerning exposure of electrodes for longer periods of time.N-71-11 06-17-82 Additional Materials for Com-02-14-83 ponent Supports Fabricated by Welding,Section III, Divi-sion 1, Subsection NF, Class 1, 2, 3, and MC Component Supports Code Case N-71-11 was acceptable subject to the following conditions in addition to those condi-tions specified in the Code Case: The maximum measured ultimate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materials to brittleness and stress corro-sion cracking.

Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the Design Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the impact test results for the material meet code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sustained loads in service. In the last sentence of paragraph

5.3, reference should be made to paragraph

4.5.2.2, "Alternate N-71-10 05-11-81 06-17-82 Additional Materials for Com-ponent Supports Fabricated by Welding,Section III, Divi-sion 1, Subsection NF, Class 1, 2, 3, and MC Component Supports 1.85-13 Atmosphere Exposure Time Periods Established by Test," of the AWS D.1.1 Code for the evi-dence presented to and accepted by the Author-ized Inspector concerning exposure of electrodes for longer periods of time.N-71-12 02-14-83 Additional Materials for Com-02-20-84 ponent Supports Fabricated by Welding,Section III, Divi-sion 1, Class 1, 2, 3, and MC Code Case N-71-12 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The maximum measured ultimate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materials to brittleness and stress corro-sion cracking.

Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the Design Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the impact test results for the material meet code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or as-sembly stresses, and it does not experience fre-quent sustained loads in service. In the last sen-tence of paragraph

5.3, reference should be made to paragraph

4.5.2.2, "Alternate Atmos-phere Exposure Time Periods Established by Test," of the AWS D. 1.. Code for the evidence presented to and accepted by the Authorized In-spector concerning exposure of electrodes for longer periods of time. The provisions of para-graph 4.3 are not acceptable on a generic basi

s. Paragraph

16.2.2 is not acceptable as written and should be replaced with the following:

When not exempted by 16.2.1, above, the postweld heat treatment shall be performed in accordance with NF-4622 except that for ASTM A-710 Grade A material it shall be at least 1000'F (540'C) and shall not exceed 1150'F (620°C) for Class 1 and Class 2 material and 1175'F (640 0 C) for Class 3 material.

The new holding time at temperature for weld thickness (nominal)

shall be 30 minutes for 1/2 inch or less, 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per inch for thickness over 1/2 inch to 5 inches, and 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> plus 15 minutes for each additional inch over 5 inches.N-71-13 02-20-84 Additional Materials for Sub-12-05-85 section NF, Classes 1, 2, 3 and MC Component Supports Fabricated by Welding, Sec-tion III, Division 1 Code Case N-71-13 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The maximum measured ultimate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materials to brittleness and stress corro-sion cracking.

Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the Design Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the impact test results for the material meet code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or as-sembly stresses, and it does not experience fre-quent sustained loads in service. In the last sen-tence of paragraph

5.3, reference should be made to paragraph

4.5.2.2, "Alternate Atmos-phere Exposure Time Periods .Established by Test," of the AWS D.1.1 Code for the evidence presented to and accepted by the Authorized In-spector concerning exposure of electrodes for longer periods of tim

e. Paragraph

16.2.2 is not acceptable as written and should be replaced with the following:

When not exempted by 16.2.1 above, the postweld head treatment shall be performed in accordance with NF-4622 ex-cept that for ASTM A-710 Grade A material, it shall be at least 1000*F (540'C) and shall not exceed 1150'F (620 0 C) for Class 1 and Class 2 material and 1175°F (640'C) for Class 3 mate-rial. The new holding time at temperature for weld thickness (nominal)

shall be 30 minutes for 1/2 inch or less, 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per inch for thickness over 1/2 inch to 5 inches, and 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> plus 15 minutes for each additional inch over 5 inches.The fracture toughness requirements as listed in this Code Case apply only to piping supports and not to Class 1, 2, and 3 component supports.The fracture toughness of Classes 1, 2, and 3 component supports shall be characterized in. ac-cordance with paragraph

5.3.4 of the USNRC Standard Review Plan (NUREG-0800)

or on a case-by-case basis.N-71-14 12-05-85 Additional Materials for Sub-12-16-86 section NF, Classes 1, 2, 3 and MC Component Supports Fabricated by Welding, Sec-tion III, Division 1 Code Case N-71-14 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: The maximum 1.85-14 measured ultimate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the susceptibility of high-strength materials to brittleness and stress corro-sion cracking..

Certain applications may exist where a UTS value of up to 190 Ksi could be considered acceptable for a material and, under this condition, the Design Specification should specify impact testing for the material.

For these cases, it should be demonstrated by the applicant that (1) the impact test results for the material meet code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience fre-quent sustained loads in service. In the last sentence of paragraph

5.3, reference should be made to paragraph

4.5.2.2, "Alternate Atmos-phere Exposure Time Periods Established by Test," of the AWS D. 1.1 Code for the evidence presented to and accepted by the Authorized In-spector concerning exposure of electrodes for longer periods of tim

e. Paragraph

16.2.2 is not acceptable as written and should be replaced with the following:

When not exempted by 16.2. 1, above, the postweld head treatment shall be performed in accordance with NF-4622 ex-cept that for ASTM A-710 Grade A material, it shall be at least 1000°F (5407C) and shall not exceed 1150'F (620'C) for Class 1 and Class 2 material and 1175*F (640°C) for Class 3 mate-rial. The new holding time at temperature for weld thickness (nominal)

shall be 30 minutes for 1/2 inch or less, 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per inch for thickness over 1/2 inch to 5 inches, and 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> plus 15 minutes for each additional inch over 5 inches.The fracture toughness requirements as listed in this Code Case apply only to piping supports and not to Class 1, 2, and 3 component supports.The fracture toughness of Classes 1, 2, and 3 component supports shall be characterized in ac-cordance with paragraph

5.3.4 of the USNRC Standard Review Plan (NUREG-0800)

or on a case-by-case basis.1682 01-29-75 Alternate Rules for Material 08-11-75 Manufacturers and Suppliers,Section III, Subarticle NA-3700 1714 08-11-75 Postweld Heat Treatment of 07-11-774 P-1 Material,Section III, Class MC 1714-1 07-11-774 Postweld Heat Treatment of (N-102-1)

08-28-78 P-1 Material,Section III, Class MC 1722 1741 1755 1759 11-03-75 Vacuum, Carbon Deoxidized

01-08-79 SA-508 Forgings,Section III, Division 1, and VIII, Division 1 and 2 12-22-75 Interim Rules for the Re-01-14-77 quired Number of Impact Tests for Rolled Shapes, Sec-tion III, Division 1, Subsec-tion NF, Component Supports 04-26-76 Alternative Rules for Exami-01-14-77 nation of Welds in Piping, Class 1 and 2 Construction,Section III, Division 1 08-13-76 Material for Internal Pressure 05-15-78 Retaining Items for Pressure Relief Valves,Section III, Division 1, Class 1, 2, and 3 Code Case 1759 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Applicants us-ing this Case should also use Code Case 1711 for the design of pressure relief valves.N-188 08-29-77 Use of Welded Ni-Fe-Cr-Mo-

05-15-78 Cu (Alloy 825) and Ni-Cr Mo-Cb (Alloy 625) Tubing, Section I1i, Division 1, Class 3 N-207 03-20-78 Use of Modified SA-479 Type 03-19-79 XM-19 for Section III, Division 1, Class 1, 2 or 3 Construction N-224 11-20-78 Use of ASTM A500 Grade B 05-11-81 and ASTM A501 Structural Tubing for Welded Attach-ments for Section III, Class 2 and 3 Construction N-242 04-12-79 Materials Certification, Sec-04-10-80 tion III, Division 1, Classes 1, 2, 3, MC, and CS Construction Code Case N-242 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Applicants should identify the components and supports re-quiring the use of paragraphs

1.0 through 4.0 of the Code Case in their Safety Analysis Reports.N-246-1 09-07-82 05-25-83 N-249 01-07-80 05-11-81 SB-169, Alloy C 61400, Sec-tion III, Division 1, Class 3 Additional Materials for Component Supports Fabri-cated Without Welding, Sec-tion III, Division 1, Subsec-tion NF, Class 1, 2, 3, and MC Component Supports Code Case N-249 was acceptable subject to the following condition in addition to those condi-1.85-15 tions specified in the Code Case: Footnote 2 of the Code Case should apply to all materials listed in Tables 1, 2, 3, 4, and 5 of the Code Case and should be so indicated on line 5 of the "Reply." N-249-1 05-11-81 06-17-82 Additional Materials for Component Supports Fabri-cated Without Welding,Section III, Division 1, Sub-section NF, Class 1, 2, 3, and MC Component Supports Code Case N-249-1 was acceptable subject to the following condition in addition to those condi-tions specified in the Code Case: Paragraph

7 of the "Reply" should reference the requirements of NF-2600 instead of NF-2800. This is a typo-graphical error in that NF-2800 does not exist.N-249-2 06-17-82 Additional Materials for Sub-02-14-83 section NF Class 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 N-249-3 02-14-83 Additional Materials for Sub-02-20-84 section NF Class 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 N-249-4 02-20-84 Additional Material for Sub-09-17-84 section NF, Classes 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 The fracture toughness requirements as listed in Code Case N-249-4 apply only to piping.supports and not to Classes 1, 2, and 3 component sup-ports. The fracture toughness of Classes 1, 2, and 3 component supports should be characterized in accordance with paragraph

5.3.4 of the USNRC Standard Review Plan (NUREG-0800)

or on a case-by-case basis.N-249-5 09-17-84 Additional Material for Sub-04-08-85 section NF, Classes 1, 2, 3, and. MC Component Supports Fabricated Without Welding,Section III, Division 1 The fracture toughness requirements as listed in Code Case N-249-5 apply only to piping supports and not to Classes 1, 2, and 3 component sup-ports. The fracture toughness of Classes 1, 2, and 3 component supports should be characterized in accordance with paragraph

5.3.4 of the USNRC Standard Review Plan (NUREG-0800)

or on a case-by-case basis.N-249-6 04-08-85 Additional Material for Sub-09-05-85 section NF, Classes 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 Code Case N-249-6 was acceptable subject to the following conditions in addition to those condi-tions specified in the Code Case: The fracture toughness requirements apply only to piping sup-ports and not to Classes 1, 2, and 3 component supports.

The fracture toughness of Classes 1, 2, and 3 component supports should be character- ized in accordance with paragraph

5.3.4 of the USNRC Standard Review Plan (NUREG-0800)

or on a case-by-case basis. The following is to be added to paragraph

(5) of the Case: For these cases, it should be demonstrated by the owner that (1) the impact test results for the material meet Code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or as-sembly stresses, and it does not experience fre-quent sustained loads in service.N-249-7 09-05-85 Additional Material for Sub-12-05-85 section NF, Classes 1, 2, 3, and MC Component Supports Fabricated Without Welding, (Section III, Division 1 Code Case N-249-7 was acceptable subject to the following conditions in addition to those condi-tions specified in the Code Case: The fracture toughness requirements apply only to piping sup-ports and not to Classes 1, 2, and 3 component supports.

The fracture toughness of Classes 1, 2, and 3 component supports should be character- ized in accordance with paragraph

5.3.4 of the USNRC Standard Review Plan (NUREG-0800)

or on a case-by-case basis. The following is to be added to paragraph-

(5) of the Case: For these cases, it should be demonstrated by the owner that (1) the impact test results for the material meet Code requirements and (2) the material is not subject to stress corrosion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does.not experience fre-quent sustained loads in service.N-249-8 12-05-85 Additional Material for Sub-12-16-86 section NF, Classes 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 Code Case N-249-8 was acceptable subject to the following conditions in addition to those 1.85-16 conditions specified in the Code Case: The frac-ture toughness requirements apply only to piping supports and not to Classes 1, 2, and 3 compo-nent supports.

The fracture toughness of Classes 1, 2, and 3 component supports should be char-acterized in accordance with paragraph

5.3.4 of the USNRC Standard Review Plan (NUREG-0800)

or on a .case-by-case basis. The following is to be added to paragraph

(5) of the Case: For these cases, it should be demonstrated by the owner that (1) the impact test results for the material meet Code requirements and (2) the material is not subject to stress corrosion crack-ing by virtue of'the fact that (a) a corrosive envi-ronment is not present and (b) the component that contains the material has essentially no re-sidual stresses or assembly stresses, and it does not experience service.N-265 1 9 01-07-80 09-01-83 12-31-84 05-19-85 frequent sustained loads in Modified SA-487 Castings,Section III, Division 1, Class 1 N-299 11-17-80 Use of Nickel-Chromium-

11-28-83 Molybdenum-Columbium Al-07-18-85 loy 625 Forgings,Section III, Division 1, Class 2 and Class 3 Components N-321 07-13-81 Use of Modified SA-249, 07-13-84 Type 304 for Section III, 12-05-85 Division 1, Class 1 Construc-tion N-337 04-02-82 Use of ASTM B525-70 Grade 05-19-85 II, Type II, Sintered Austen-07-18-85 itic Stainless Steel for Class 2, 3, and MC Component Stan-dard Supports,Section III, Division 1 N-352 07-16-82 Use of SA-638 Grade 660 05-19-85 Forgings and Bars Below 07-18-85 700°F Without Stress Rupture Tests,Section III, Division 1 N-370 02-14-83 Modified SA-705 Grade 07-18-85 XM-13 Forgings,Section III, Division 1 N-370-1 07-18-85 Modified SA-705 Grade 12-05-85 XM-13 Forgings,Section III, Division 1 N-371 02-14-83 12 Cr-IW-1Mo-1/4V

Marten-07-18-85 sitic Stainless Steel Valve In-ternals,Section III, Division 1'0 Code Case N-265 was allowed to expire on 1-7-83 be-cause of an administrative error. It was reinstated on 9-1-83 with no technical changes. The Case is, therefore, considered in effect during that period of time. Again, Code Case N-265 was allowed to expire on 12-31-84 (mandatory annulment date). It was reinstated as N-265-1 on 5-19-85. 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 12-31-84 through 5-19-85.N-379 04-04-83 Bimetallic Tubing Section III, 07-18-85 Division 1, Class 1 N-418 12-05-84 Use of Seamless Ni-Fe-Cr-07-30-86 Mo-Cu Low Carbon (UNS N08028 and UNS N08904)Tubing,Section III, Division 1, Classes 2 and 3 N-438 02-23-87 Fe-24.5Ni-2lCr-6.5 Mo-0.2N 03-08-89 (Alloy UNS N08367) Seam-less and Welded Pipe, Tube, Plate, Bar, Fittings, and Forg-ings, Class 2 and 3 Construc-tion,Section III, Division 1 N-443 05-07-87 High Yield Strength Cr-Mo 03-08-89 Steel, Class 1 Components,Section III, Division 1 4. Code Cases for Class 1 components that are not on the approved list of this guide (paragraph C. 1)or other regulatory guides, or for which authorization by the Commission has not been granted, are not acceptable for Class 1 components.

5. 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.1. Except for those Code Cases that have been annulled by action of the ASME, the NRC staff has found the Code Cases listed in this regulatory guide under regulatory position C. 1 acceptable for appropriate use. Other Code Cases may be considered for use in accordance with footnote 6 of the Codes and Standards rule, §50.55a of 10ýCFR Part 50.2. Components ordered to a specific version of a Code Case need not be changed because a subsequent revision of 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.1.85-17 APPENDIX NUMERICAL

LISTING OF CODE CASES*N-4-11 (1337-11)

N-246-2 N-404 N-7-1 N-249-9 N-418-1 N-17 (1474-1) N-265-1 N-438-1 N-20-3 N-294 N-439 N-26 (1527) N-329 N-440 N-60-3 N-337-1 N-441 N-71-15 N-127 (1755-1) N-348-1 N-443-1 N-131-1 (1759-1) N-351 N-459 N-188-1 N-367 N-466 N-205 N-370-2 N-469 N-224-1 N-379-1 N-470*Code Case 1624 was inadvertently listed in the appendix of Regulatory Guide 1.85, Revision 1.1.85-18 THIS DOCUMENT WAS PRINTED USING RECYCLED PAPER.

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