ML030230238

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1 to Regulatory Guide 1. 147, Inservice Inspection Code Case Acceptability ASME Section Xi Division 1.
ML030230238
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Issue date: 10/31/1994
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Office of Nuclear Regulatory Research
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RG-1.147, Rev 11
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U.S. NUCLEAR REGULATORY COMMISSION Revision 11 October 1994 REGULATORY GUIDE OFFICE OF NUCLEAR REGULATORY RESEARCH REGULATORY GUIDE 1.147 INSERVICE INSPECTION CODE CASE ACCEPTABILITY ASME SECTION XI DIVISION 1 A. INTRODUCTION Section 50.55a, "Codes and Standards," of 10 CFR Part 50, "Domestic Licensing of Production and Utilization Facilities," requires, in part, that each operating license for a boiling or pressurized water cooled nuclear power facility and each construction permit for a utilization facility be subject to the condi tions in paragraph (g), "Inservice Inspection Require ments," of § 50.55a. Paragraph (g) requires, in part, that Classes 1, 2, and 3 components and their supports meet the requirements of Section XI, "Rules for Inser vice Inspection of Nuclear Power Plant Compo nents,"' of the American Society of Mechanical Engi neers (ASME) Boiler and Pressure Vessel Code or equivalent quality standards.

Paragraph 50.55a(b), in part, references the latest editions and addenda in ef fect of Section XI of the Code and any supplementary requirements to that section of the Code. Footnote 6 to § 50.55a states that the use of specific Code Cases may be authorized by the Commission upon request pursuant to paragraph 50.55a(a)(3), which requires that proposed alternatives to the described require ments or portions thereof provide an acceptable level of quality and safety. 'Copies may be obtained from the American Society of Me chanical Engineers, United Engineering Center, 345 East 47th Street, New York, NY 10017.USNRC REGULATORY GUIDES Regulatory Guides are Issued to describe and make available to the public such Information as methods acceptable to the NRC staff for Implement Ing specific parts of the Commission's regulations, techniques used by the staff In evaluating specific problems or postulated accidents, and data needed by the NRC staff In Its review of applications for permits and licenses.

Regulatory Guides are not substitutes for regulations, and com pliance 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 continuance 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 appropriate, to accommodate comments and to reflect new Information or experience.

Written comments may be submitted to the Rules Review and Directives Branch, DFIPS, ADM, U.S. Nuclear Regulatory Commission, Washing ton, DC 20555-0001.

General Design 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 compo nents important to safety be designed, fabricated, erected, and tested to quality standards commensurate with the importance of the safety function to be per formed. Where generally recognized codes and stan dards are used, Criterion 1 requires that they be identi fied and evaluated to determine their applicability, adequacy, and sufficiency and be supplemented or modified as necessary to ensure a quality product in keeping with the required safety function.

This regulatory guide lists those Section XI ASME Code Cases that are generally acceptable to the NRC staff for implementation in the inservice inspection of light-water-cooled nuclear power plants. This regulatory guide contains no information col lection 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." 1 Gener ally, the individual Code Cases that make up this docu ment explain the intent of Code rules or provide for alternative requirements under special circumstances.

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, Mali Stop SSOP, Washington, DC 20402-9328, telephone (202)512-2249 or (202)512-2171.

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, Springfield, VA 22161.C-')

Most Code Cases are eventually superseded by revision of the Code and then are annulled by action of the ASME. In such instances, the intent of the an nulled 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 in stances, 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 the approved situation because annul ment of such a Code Case could result in situations that would not meet Code requirements.

The ASME con siders the use of Code Cases to be optional for the user and not a mandatory requirement.

The Code Cases listed in this guide are limited to those cases applicable to Section XI of the Code. All published Code Cases that are applicable to Section XI of the Code and were in effect on July 28, 1992, were reviewed for inclusion in this guide. Code Cases that are not listed herein are either not endorsed or will require supplementary provisions on an individ ual plant basis to attain endorsement status. The endorsement of a Code Case by this guide constitutes acceptance of its technical position for ap plications not precluded by regulatory or other require ments or by the recommendations in this or other regu latory guides. Contingent endorsement if applicable is indicated in regulatory position I 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 recom mended limitations resulting from Code Case usage. Acceptance or endorsement by the NRC staff ap plies only to those Code Cases or Code Case revisions with the date of ASME approval as shown in the regu latory position of this guide. Earlier or later revisions of a Code Case are not endorsed by this guide. New Code Cases will require evaluation by the NRC staff to deter mine 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 revision of existing Code Cases. C. REGULATORY POSITION 1. ACCEPTABLE CODE CASES The Section XI ASME Code Cases 2 listed below (by number, date of ASME approval, 3 and title) are *Lines indicate substantive changes from Revision 10. 2 A numerical listing of the Code Cases appears in the appen dix. 3When more than one date is given, the earlier date is that on which the Code Case was approved by the ASME, and the later date (or dales) is that on which the Code Case was reaffirmed by the ASME.acceptable to the NRC staff for application in the inser vice inspection of components and their supports for water-cooled nuclear power plants. Their use is accept able 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 recom mended by the NRC staff and given with the individual Code Case in the list. 1705-1 3-1-76 N-98 11-20-78 1-21-82 12-5-84 12-5-87 12-3-90 N-113-1 12-13-82 2-14-85 2-14-88 12-3-90 N-211 4 7-13-81 7-13-84 5-7-87 4-30-90 N-235 1-8-79 4-2-82 2-14-85 2-14-88 12-3-90 N-236-1 9-5-85 9-5-88 8-14-91 N-307-1 12-5-84 12-5-87 12-3-90 N-311 5-11-81 4-5-84 5-7-87 4-30-90 Ultrasonic Calibration Section XI Examination Block Tolerances, Basic Calibration Block for Ultrasonic Examination of Welds 10 in. to 14 in. Thick,Section XI, Division 1 Recalibration of Ultrasonic Equipment Upon Change of Personnel,Section XI, Divi sion 1 Ultrasonic Calibration Checks per Section V,Section XI, Di vision 1 Repair and Replacement of Class MC Vessels,Section XI, Division 1 Revised Ultrasonic Examina tion Volume for Class 1 Bolt ing, Table IWB-2500-1, Ex amination Category B-G-1, When the Examinations Are Conducted from the Center Drilled Hole,Section XI, Division 1 Alternative Examination of Outlet Nozzle on Secondary Side of Steam Generators,Section XI, Division 1 Code Case N-311 is acceptable subject to the fol lowing condition in addition to those conditions specified in the Code Case: The applicant should indicate in the Safety Analysis Report that the stress analysis of the nozzle inside-corner region meets the Code Case stipulations for the state of stress in this region. 4 The Code Case was annulled on 3-20-81 (ASME mandatory annulment date). It was reinstated on 7-13-81. Because there was no change in the Code Case, the NRC considers that the Case was in effect during the period 3-20-81 through 7-13-81.1.147-2 N-335-1 6-20-85 Rules for Ultrasonic Exami 6-20-88 nation of Similar and Dissimi 5-13-91 lar Metal Piping Welds, Sec tion XI, Division 1 N-355 7-16-82 Calibration Block for Angle 2-14-85 Beam Ultrasonic Examination 2-14-88 of Large Fittings in Accor 12-3-90 dance with Appendix III 3410,Section XI, Division 1 N-356 7-1-885 Certification Period for Level 10-23-88 III NDE Personnel,Section XI, Division 1, 2 and 3 N-389 7-25-83 Alternative Rules for Repairs, 5-14-86 Replacements, or Modifica 5-14-89 tions,Section XI, Division 1 2-5-92 Code Case N-389 is acceptable subject to the fol lowing condition in addition to those conditions specified in the Code Case: The applicant should submit for approval the appropriate edition and addenda of the Code that is to be used for the re pair, replacement, or modification before start of the work. N-401-1 5-4-88 Eddy Current Examination, 5-13-91 Section XI, Division 1 N-402-1 3-14-91 Eddy Current Calibration Standards,Section XI, Division 1 N-408-2 7-24-89 Alternative Rules for Exami nation of Class 2 Piping, Sec tion XI, Division 1 Code Case N-408-2 is acceptable subject to the following condition in addition to those conditions specified in the Code Case: The applicant for an operating license should define the Class 2 piping subject to volumetric and surface examination in the Preservice Inspection for determination of ac ceptability by the NRC staff. N-409-2 7-27-88 Procedure and Personnel 5-13-91 Qualification Requirements for Ultrasonic Detection and Sizing of Flaws in Piping Welds,Section XI, Division 1 Code Case N-409-2 is acceptable subject to the following condition in addition to those conditions specified in the Code Case: The applicant should give prior notification to the NRC of the intention to use the Code Case.N-415 9-5-85 9-5-88 8-14-91 Alternative Rules for Testing Pressure Relief Devices, Sec tion XI, Division 1 5July 1, 1988, is the date that the conditions of the Code Case were acceptable to the NRC.N-416 12-5-85 12-5-87 12-3-90 N-419 7-18-85 7-18-88 5-13-91 N-426 7-18-85 7-18-88 5-13-91 N-427 12-5-85 12-5-88 12-16-91 Alternative Rules for Hydro static Testing of Repair or Re placement of Class 2 Piping,Section XI, Division 1 Extent of VT-1 Examinations, Category B-G-1 of Table IWB-2500-1,Section XI, Di vision 1 Extent of VT-1 Examinations, Category B-G-2 of Table IWB-2500-1,Section XI, Di vision 1 Code Cases in Inspection Plans,Section XI, Division 1 I 1.147-3 Code Case N-427 is acceptable subject to the fol lowing condition in addition to those conditions specified in the Code Case. The sentence under (b)(1) should be replaced with the following:

Code Cases that were superseded with revised Code Cases and had been approved for use in ac cordance with (a) may continue to be used. N-429-1 2-23-87 Alternative Rules for Ultra 3-5-90 sonic Instrument Calibration,Section XI, Division 1 N-432 2-20-86 Repair Welding Using Auto 2-20-89 matic or Machine Gas o 12-16-91 Tungsten-Arc Welding (GTAW) Temperbead Tech nique,Section XI, Division 1 N-435-1 7-30-86 Alternative Examination Re 7-30-89 quirements for Vessels with Wall Thickness 2 in. or less,Section XI, Division 1 N-437 7-30 86 Use of Digital Readout and 7-30-89 Digital Measurement Devices for Performing Pressure Tests,Section XI, Division 1 N-448 7-27-87 Qualification of VT-2 and 4-30-90 VT-3 Visual Examination Per sonnel,Section XI, Division 1 N-449 7-27-87 Qualification of VT-4 Visual 4-30-90 Examination Personnel, Sec tion XI, Division 1 N-457 12-7-87 Qualification Specimen Notch 12-3-90 Location for Ultrasonic Ex amination of Bolts and Studs,Section XI, Division 1 N-458 8-14-90 Magnetic Particle Examina tion of Coated Materials,Section XI, Division 1 N-460 7-27-88 Alternative Examination Cov 5-13-91 erage for Class 1 and Class 2 Welds,Section XI, Divi sion 1 N-461 11-30-88 Alternative Rules for Piping 8-14-91 Calibration Block Thickness,Section XI, Division 1 Code Case N-461 is acceptable subject to the following condition in addition to those conditions specified in the Code Case: Thickness measure ments and weld joint contour of the pipe/compo nent must be known and used by the inspector who conducts the UT examination.

N-463-1 3-5-90 Evaluation Procedures and Acceptance Criteria for Flaws in Class 1 Ferritic Piping That Exceed the Acceptance Standards of IWB-3514.2,Section XI, Division 1 N-465 11-30-88 Alternative Rules for Pump 8-14-91 Testing,Section XI, Divi sion 1 N-471 4-30-90 Accoustic Emission for Suc cessive Inspections,Section XI, Division 1 Code Case N-471 is acceptable subject to the following conditions in addition to those specified in the Code Case: The first successive examination required by IWB-2420 or IWC-2420 shall be per formed. The owner shall evaluate the results of the on-line acoustic emission monitoring to confirm that the conclusions from the acoustic emission data represent the condition of the flaw indication as estimated from the first successive ISI Examin ation and the data can be correlated with the known plant operating environment.

N-472 3-8-89 Use of Digital Readout and 12-16-91 Digital Measurement Devices for Performing Pump Vibra tion Testing,Section XI, Divi sion 1 N-473 N-479-1 3-8-89 Alternative Rules for Valve 12-16-91 Testing,Section XI, Division 1 12-3-90 Boiling Water Reactor (BWR) Main Steam Hydrostatic Test,Section XI, Division 1 N-481 3-5-90 Alternate Examination Re quirements for Cast Austeni tic Pump Casings,Section XI, Division 1 N-485-1 8-14-91 Eddy Current Examination of Coated Ferritic Surfaces as an Alternative to Surface Exam ination,Section XI, Divi sion 1 N-489 8-14-90 Alternative Rules for Level III NDE Qualification Examina-tions,Section XI, Divisions 1, 2, and 3 N-490-1 5-13-91 Alternative Vision Test Re quirements for Nondestructive Examiners,Section XI, Divisions 1, 2, and 3 N-491 3-14-91 Alternative Rules for Exami nation of Class 1, 2, 3 and MC Component Supports of Light-Water Cooled Power Plants,Section XI, Division 1 N-494-1 7-27-92 Pipe Specific Evaluation Procedures and Acceptance Criteria for Flaws in Class 1 Ferritic Piping that Exceeds the Acceptance Standards of IWB-3514.2,Section XI, Division 1 N-495 12-3-90 Hydrostatic Testing of Relief Valves,Section XI, Division 1 N-496 3-14-91 Helical Coil Threaded Inserts,Section XI, Division 1 N-498 6 5-13-91 Alternative Rules for 10-Year Hydrostatic Pressure Testing for Class 1 and 2 Systems,Section XI, Division 1 N-503 2-5-92 Limited Certification of Non destructive Examination Per sonnel,Section XI, Division 1 N-504 4-30-92 Alternative Rules for Repair of Class 1, 2, and 3 Austenitic Stainless Steel Piping,Section XI, Division 1 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 that were annulled on or after November 1, 1978, are listed below by number, effective dates, 7 and title.1551 N-34 11-6-72 Inservice Inspection of Welds 11-20-78 on Nuclear Components, Sec 11-20-81 tion XI OCode Case N-498 was approved for use by ASME on 5-13-91. It was included in Revision 9 of this guide because of an urgent need for the case. 7 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 reaffirma tion of the Code Case.1.147-4 C)1646 8-12-74 Partial Postponement of Cate N-72 11-20-78 gory B-C Examination for 1-1-81 Class 1 Components,Section XI 1647 8-12-74 Partial Postponement of Cate N-73 11-20-78 gory B-D Examination for 1-1-81 Class 1 Components,Section XI 1730 11-3-75 Acceptance Standards for N-112 7-1-79 Class 2 and 3 Components,Section XI, Division 1 1738 12-22-75 Examination

-Acceptance N-118 11-20-78 Standards for Surface Indica 1-21-82 tions in Cladding,Section XI 1-21-85 1-21-88 12-3-90 Code Case 1738 (N-118) was acceptable subject to the following condition in addition to those con ditions specified in the Code Case. The last sen tence of the "Reply" should be replaced with the following:

The provisions of this Code Case may not be applied for the examination of clad surfaces of nozzles, including the inner surface of the nozzle-to-vessel insert welds. 1804 1-14-77 Minimum Section Thickness N-167 1-14-80 Requirements for Repair of Nozzles,Section XI, Divi sion 1 N-210 3-20-78 Exemption to Hydrostatic 3-20-81 Tests After Repairs,Section XI, Division 1 Code Case N-210 was acceptable subject to the following condition in addition to those conditions specified in the Code Case. Paragraph (3) of the "Reply" should be replaced with the following:

Re pairs to piping, pumps, and valves where the depth of the repaired cavity does not exceed 25 percent of the wall thickness.

N-211 3-20-78 Recalibration of Ultrasonic 3-20-81 Equipment Upon Change of Personnel,Section XI, Divi sion 1 N-216 3-10-78 Alternative Rules for Reactor 7-13-81 Vessel Closure Stud Examina 7-13-84 tion,Section XI, Division 1 5-7-87 5-7-90 N-278 3-17-80 3-17-838 5-25-838 2-19-86 2-19-89 2-19-92 Alternative Ultrasonic Cali bration Block Configuration 1-3131 and T-434.3,Section XI, Division 1 Code Case N-278 is acceptable subject to the fol lowing conditions in addition to those conditions specified in the Code Case: When a universal cali bration block is used and some or all of the refer ence holes are larger than the reflector holes at comparable depths recommended by Article IV,Section V, 1980 edition of the ASME Code, a cor rection factor should be used to adjust the DAC level to compensate for the larger reflector holes. Also, if the reactor pressure vessel was previously examined by using a conventional block, a ratio between the DAC curves obtained from the two blocks should be noted (for reference) with the significant indication data. N-288 8-25-80 Hydrostatic Test Require 5-25-83 ments for Class 1 and Class 2 Components,Section XI, Di vision 1 N-306 1-15-81 Calibration Block Material 4-5-84 Selection, Appendix 1, 5-7-87 1-3121,Section XI, Division 5-7-90 N-308 9-30-81 9-30-84 9-30-87 4-30-90 9-30-90 1 Documentation of Repairs and Replacements of Compo nents in Nuclear Power Plants,Section XI, Division 1 N-234 1-8-79 1-21-82 12-5-84 12-5-87 12-3-90 Time Between Ultrasonic Calibration Checks,Section XI, Division 1 eCode Case N-278 was inadvertently allowed to expire be cause of an ASME administrative error on 3-17-83, its manda tory annulment date. The Code Case without any technical changes was reinstated on 5-25-83. Because of these circum stances, the Code Case is considered to be in effect during that period of time.1.147-5 N-252 11-19-79 Low Energy Capacitive Dis 7-16-82 charge Welding Method for Temporary or Permanent At tachments to Components and Supports,Section III, Division 1, and XI Code Case N-252 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: The applicant should indicate in the Safety Analysis Report the applica tion, the material, and the thickness of the mate rial to which the strain gage or thermocouple will be attached by CD welding.

N-343 4-2-82 2-14-85 2-14-88 12-3-90 N-375-2 4-5-84 5-7-87 5-7-90 N-406 4-5-84 5-7-87 5-7-90 N-424 7-18-85 7-18-88 Alternative Scope of Exami nation of Attachment Welds for Examination Categories B-H, B-K-i, and C-C,Section XI, Division 1 Rules for Ultrasonic Examina tion of Bolts and Studs, Sec tion XI, Division 1 Alternative Rules for Replace ment,Section XI, Division 1 Qualification of Visual Exami nation Personnel,Section XI, Division 1 N-436-1 12-7-87 Alternative 12-3-90 Evaluation of tenitic Piping, vision 1 N-444 9 12-7-87 12-3-90 N-445 5-7-87 5-7-90 Methods for Flaws in AusSection XI, Di-Preparation of Inspection Plans,Section XI, Division 1 Use of Later Editions of SNT TC-1A for Qualification of Nondestructive Examination Personnel,Section XI, Divi sion 1, 2, and 3 N-446 5-7-87 Recertification of Visual Ex 5-7-90 amination Personnel,Section XI, 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 November 1, 1978, 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 0 and title.1731 11-3-75 N-113 11-20-78 1-21-82 12-13-82 Basic Calibration Block for Ultrasonic Examination of Welds 10 in. to 13 in. Thick,Section XI, Division 1 9 Valve stroke times may be documented outside of the IST program. However, if included within the IST program and it becomes necessary to revise the maximum stroke time required by "Supplement 4-Content of IWV Valve Test Tables," it is not necessary to submit a revised IST program to the NRC solely to document a revision in valve stroke time. " 1 0 Earlier date-date Code Case was approved by ASME; later date-date revision of Code Case was approved by ASME. Where more than two dates appear, the last date is the date on which the Code Case was revised. The middle date (or dates) was the date of reaffirmation of the Code Case.N-236 1-8-79 1-21-82 12-5-84 9-5-85 Repair and Replacement of Class MC Vessels,Section XI, Division 1 Code Case N-236 was acceptable subject to the following conditions in addition to those condi tions specified in the Code Case: a. In paragraph 1.0(a), second sentence-the phrase, "while the plant is not in service," refers to a refueling outage. b. In paragraph 1.0(a), third sentence-the phrase, "the next scheduled plant outage," refers to the next scheduled refueling outage. For clarification, Repair and Replacement of Class MC Vessels means Repair and Replacement of Class MC Vessels and Components (systems).

Acceptance of this Code Case in no way infers NRC approval to violate the technical specification or any NRC require ments with regard to breach of containment during re*pair and replacement procedures while the plant is in operation.

Where a numbered Code paragraph is not identified by a particular edition of the Code, the Code in effect at the time of the ASME meeting (11-3-78) that approved the Code Case should be governing.

N-307 1-15-81 Revised Ultrasonic Examina 4-5-84 tion Volume for Class 1 Bolt 12-5-84 ing, Examination Category B-G-1, When the Examina tions Are Conducted from the Center-Drilled Hole,Section XI, Division 1 N-335 4-2-82 Rules for Ultrasonic Examina 2-14-85 tion of Similar and Dissimilar 6-20-85 Metal Piping Welds,Section XI, Division 1 N-375 1 1 2-14-83 Rules for Ultrasonic Examina 4-14-83 tion of Bolts and Studs, Sec tion XI, Division 1 N-375-1 4-14-83 Rules for Ultrasonic Examina 4-5-84 tion of Bolts and Studs, Sec tion XI, Division 1 N-401 2-20-84 Eddy Current Examination, 2-23-87 Section XI, Division 1 5-4-88 N-402 2-20-84 2-23-87 3-5-90 3-14-91 N-408 7-12-84 5-7-87 3-8-89 Eddy Current Calibration Standard Material,Section XI, Division 1 Alternative Rules for Exami nation of Class 2 Piping, Sec tion XI, Division 1"Code Case N-375 was not listed prior to Revision 3 of this regulatory guide.1.147-6 n N-409-1 12-7-87 7-27-88 Procedure and Personnel Qualification Requirements for Ultrasonic Detection and Sizing of Flaws in Piping Welds,Section XI, Division 1 N-408-1 3-8-89 Alternative Rules for Exami 7-24-89 nation of Class 2 Piping, Sec tion XI, Division 1 Code Case N-408-1 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: The applicant for an operating license should define the Class 2 piping subject to volumetric and surface examination in the Preservice Inspection for determination of ac ceptability by the NRC staff. N-409 12-5-84 Procedure and Personnel 12-7-87 Qualification for Ultrasonic Detection and Sizing of Intergranular Stress Corrosion Cracking in Austenitic Piping Welds,Section XI, Division 1 Code Case N-409-1 was acceptable subject to the following condition in addition to those conditions specified in the Code Case: The applicant should give prior notification to the NRC of the intention to use the Code Case. N-429 12-5-85 Alternative Rules for Ultra 2-23-87 sonic Instrument Calibration,Section XI, Division 1 N-435 5-14-86 Alternative Examination Re 7-30-86 quirements for Vessels with Wall Thickness 2 in. or Less,Section XI, Division 1 N-436 5-14-86 Alternative Methods for 12-7-87 Evaluation of Flaws in Aus tenitic Piping,Section XI, Di vision 1 N-463 11-30-88 Evaluation Procedures and 3-5-90 Acceptance Criteria for Flaws in Class 1 Ferritic Piping That Exceed the Acceptance Standards of IWB-3514.2,Section XI, Division 1 N-479 7-24-89 Boiling Water Reactor (BWR) 12-3-90 Main Steam Hydrostatic Test,Section XI, Division 1 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 10 CFR Part 50. 2. Code Cases to be applied during an inspection interval or Code Cases for a preservice inspection need not be changed because a subsequent revision of the Code Case is listed as the approved version in this guide. 3. Code Cases to be applied during an inspection interval or Code Cases for a preservice inspection that were previously approved for use may continue to be used even though the Code Case has been subse quently annulled.

4. Code Cases on the approved list may be applied to procedures for an inspection interval and proce dures for the inservice inspection that were established prior to the effective date of the Code Case within the limits specified in the Code Case and applicable regula tions or recommended in other regulatory guides.1.147-7 N-485 4-30-90 Eddy Current Examination of 8-14-91 Coated Ferritic Surfaces as an Alterantive to Surface Exam ination,Section XI, Division 1 N-490 8-14-90 Alternative Vision Test 5-13-91 Requirements for Nondestruc tive Examiners,Section XI, Divisions 1, 2, and 3 N-494 12-3-90 Pipe Specific Evaluation 7-17-92 Procedures and Acceptance Criteria for Flaws in Class 1 Ferritic Piping that Exceeds the Acceptance Standards of 1WB-3514.2,Section XI, Division 1 4. UNACCEPTABLE CODE CASES Code Cases 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 on a generic basis.

APPENDIX NUMERICAL LISTING OF CODE CASES N-98 (1705-1) N-448 N-113-1 N-449 N-211 N-457 N-235 N-458 N-236-1 N-460 N-307-1 N-461 N-311 N-463-1 N-335-1 N-465 N-355 N-471 N-356 N-389 N-472 N-401-1 N-473 N-402-1 N-479-1 N-408-2 N-481 N-409-2 N-485-1 N-415 N-489 N-416 N-490-1 N-419 N-491 N-426 N-494-11 N-427 N-495 N-429-1 N-496 N-432 N-498 N-435-1 N-503 N-437 N-504 1.147-8

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