ML030230238

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
From:	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 C-') REGULATORY GUIDE OFFICE OF NUCLEAR REGULATORY RESEARCH REGULATORY GUIDE 1.147 INSERVICE INSPECTION CODE CASE ACCEPTABILITY ASME SECTION XI DIVISION 1 A. INTRODUCTION General Design Criterion 1, "Quality Standards and Records," of Appendix A, "General Design Section 50.55a, "Codes and Standards," of Criteria for Nuclear Power Plants," to 10 CFR Part 50 10 CFR Part 50, "Domestic Licensing of Production requires, in part, that structures, systems, and compo and Utilization Facilities," requires, in part, that each nents important to safety be designed, fabricated, operating license for a boiling or pressurized water erected, and tested to quality standards commensurate cooled nuclear power facility and each construction with the importance of the safety function to be per permit for a utilization facility be subject to the condi formed. Where generally recognized codes and stan tions in paragraph (g), "Inservice Inspection Require dards are used, Criterion 1 requires that they be identi ments," of § 50.55a. Paragraph (g) requires, in part, fied and evaluated to determine their applicability, that Classes 1, 2, and 3 components and their supports adequacy, and sufficiency and be supplemented or meet the requirements of Section XI, "Rules for Inser modified as necessary to ensure a quality product in vice Inspection of Nuclear Power Plant Compo keeping with the required safety function.

nents,"' of the American Society of Mechanical Engi This regulatory guide lists those Section XI ASME neers (ASME) Boiler and Pressure Vessel Code or Code Cases that are generally acceptable to the NRC equivalent quality standards. Paragraph 50.55a(b), in staff for implementation in the inservice inspection of part, references the latest editions and addenda in ef light-water-cooled nuclear power plants.

fect of Section XI of the Code and any supplementary This regulatory guide contains no information col requirements to that section of the Code. Footnote 6 lection activities and, therefore, is not subject to the to § 50.55a states that the use of specific Code Cases requirements of the Paperwork Reduction Act of 1980 may be authorized by the Commission upon request (44 U.S.C. 3501 et seq.).

pursuant to paragraph 50.55a(a)(3), which requires that proposed alternatives to the described require B. DISCUSSION ments or portions thereof provide an acceptable level of quality and safety. The ASME Boiler and Pressure Vessel Committee 1

publishes a document entitled "Code Cases." Gener ally, the individual Code Cases that make up this docu

'Copies may be obtained from the American Society of Me ment explain the intent of Code rules or provide for chanical Engineers, United Engineering Center, 345 East 47th Street, New York, NY 10017. alternative requirements under special circumstances.

The guides are Issued In the following ten broad divisions:

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 1. Power Reactors 6. Products

7. Transportation Ing specific parts of the Commission's regulations, techniques used by 2. Research and Test Reactors

8. Occupational Health the staff In evaluating specific problems or postulated accidents, and 3. Fuels and Materials Facilities Environmental and Siting g. Antitrust and Financial Review data needed by the NRC staff In Its review of applications for permits and 4.

10 General licenses. Regulatory Guides are not substitutes for regulations, and com 5. Materials and Plant Protection 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 Copies of Issued guides may be purchased from the Government Printing findings requisite to the Issuance or continuance of a permit or license by the Commission Office at the current GPO price. Information on current GPO prices may be obtained by contacting the Superintendent of Documents, U.S.

This guide was Issued after consideration of comments received from the Government Printing Office, Mali Stop SSOP, Washington, DC public. Comments and suggestions for Improvements In these guides are 20402-9328, telephone (202)512-2249 or (202)512-2171.

encouraged at all times, and guides will be revised, as appropriate, to accommodate comments and to reflect new Information or experience.

Issued guides may also be purchased from the National Technical Infor Written comments may be submitted to the Rules Review and Directives mation Service on a standing order basis. Details on this service may be Branch, DFIPS, ADM, U.S. Nuclear Regulatory Commission, Washing obtained by writing NTIS, 5285 Port Royal Road, Springfield, VA 22161.

ton, DC 20555-0001.

Most Code Cases are eventually superseded by acceptable to the NRC staff for application in the inser revision of the Code and then are annulled by action of vice inspection of components and their supports for the ASME. In such instances, the intent of the an water-cooled nuclear power plants. Their use is accept nulled Code Case becomes part of the revised Code, able within the limitations stated in the "Inquiry" and and therefore continued use of the Code Case intent is "Reply" sections of each individual Code Case, within sanctioned under the rules of the Code. In other in the limitations of such NRC or other requirements as stances, the Code Case is annulled because it is no may exist, and within the additional limitations recom longer acceptable or there is no further requirement mended by the NRC staff and given with the individual for it. A Code Case that was approved for a particular Code Case in the list.

situation and not for a generic application should be used only for the approved situation because annul 1705-1 3-1-76 Ultrasonic Examination ment of such a Code Case could result in situations that N-98 11-20-78 Calibration Block Tolerances, would not meet Code requirements. The ASME con 1-21-82 Section XI siders the use of Code Cases to be optional for the user 12-5-84 and not a mandatory requirement. 12-5-87 12-3-90 The Code Cases listed in this guide are limited to N-113-1 12-13-82 Basic Calibration Block for those cases applicable to Section XI of the Code.

2-14-85 Ultrasonic Examination of All published Code Cases that are applicable to 2-14-88 Welds 10 in. to 14 in. Thick,Section XI of the Code and were in effect on July 28, 12-3-90 Section XI, Division 1 1992, were reviewed for inclusion in this guide. Code N-211 4 7-13-81 Recalibration of Ultrasonic Cases that are not listed herein are either not endorsed 7-13-84 Equipment Upon Change of or will require supplementary provisions on an individ Personnel,Section XI, Divi 5-7-87 ual plant basis to attain endorsement status. sion 1 4-30-90 The endorsement of a Code Case by this guide N-235 1-8-79 Ultrasonic Calibration Checks constitutes acceptance of its technical position for ap 4-2-82 per Section V,Section XI, Di plications not precluded by regulatory or other require 2-14-85 vision 1 ments or by the recommendations in this or other regu 2-14-88 latory guides. Contingent endorsement if applicable is 12-3-90 indicated in regulatory position I for specific cases.

However, it is the responsibility of the user to make N-236-1 9-5-85 Repair and Replacement of certain that no regulatory requirements are violated 9-5-88 Class MC Vessels,Section XI, and that there are no conflicts with other recom 8-14-91 Division 1 mended limitations resulting from Code Case usage. N-307-1 12-5-84 Revised Ultrasonic Examina 12-5-87 tion Volume for Class 1 Bolt Acceptance or endorsement by the NRC staff ap 12-3-90 ing, Table IWB-2500-1, Ex plies only to those Code Cases or Code Case revisions amination Category B-G-1, with the date of ASME approval as shown in the regu When the Examinations Are latory position of this guide. Earlier or later revisions of Conducted from the Center a Code Case are not endorsed by this guide. New Code Drilled Hole,Section XI, Cases will require evaluation by the NRC staff to deter Division 1 mine if they qualify for inclusion in the approved list. N-311 5-11-81 Alternative Examination of Because of the continuing change in the status of Code 4-5-84 Outlet Nozzle on Secondary Cases, it is planned that this guide will require periodic 5-7-87 Side of Steam Generators, updating to accommodate new Code Cases and any 4-30-90 Section XI, Division 1 revision of existing Code Cases.

C. REGULATORY POSITION Code Case N-311 is acceptable subject to the fol lowing condition in addition to those conditions

1. ACCEPTABLE CODE CASES specified in the Code Case: The applicant should indicate in the Safety Analysis Report that the The Section XI ASME Code Cases 2 listed below stress analysis of the nozzle inside-corner region (by number, date of ASME approval, 3 and title) are meets the Code Case stipulations for the state of

• Lines indicate substantive changes from Revision 10. stress in this region.

2 A numerical listing of the Code Cases appears in the appen dix.

4 3When more than one date is given, the earlier date is that on The Code Case was annulled on 3-20-81 (ASME mandatory which the Code Case was approved by the ASME, and the later annulment date). It was reinstated on 7-13-81. Because there date (or dales) is that on which the Code Case was reaffirmed by was no change in the Code Case, the NRC considers that the the ASME. Case was in effect during the period 3-20-81 through 7-13-81.

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N-335-1 6-20-85 Rules for Ultrasonic Exami N-416 12-5-85 Alternative Rules for Hydro 12-5-87 static Testing of Repair or Re 6-20-88 nation of Similar and Dissimi 12-3-90 placement of Class 2 Piping, 5-13-91 lar Metal Piping Welds, Sec Section XI, Division 1 tion XI, Division 1 N-419 7-18-85 Extent of VT-1 Examinations, N-355 7-16-82 Calibration Block for Angle 7-18-88 Category B-G-1 of Table 2-14-85 Beam Ultrasonic Examination 5-13-91 IWB-2500-1,Section XI, Di 2-14-88 of Large Fittings in Accor vision 1 12-3-90 dance with Appendix III N-426 7-18-85 Extent of VT-1 Examinations, 3410,Section XI, Division 1 7-18-88 Category B-G-2 of Table N-356 7-1-885 Certification Period for Level 5-13-91 IWB-2500-1,Section XI, Di 10-23-88 III NDE Personnel, Section vision 1 XI, Division 1, 2 and 3 N-427 12-5-85 Code Cases in Inspection N-389 7-25-83 Alternative Rules for Repairs, 12-5-88 Plans,Section XI, Division 1 5-14-86 Replacements, or Modifica 12-16-91 5-14-89 tions,Section XI, Division 1 I 2-5-92 Code Case N-389 is acceptable subject to the fol Code Case N-427 is acceptable subject to the fol lowing condition in addition to those conditions lowing condition in addition to those conditions specified in the Code Case. The sentence under specified in the Code Case: The applicant should (b)(1) should be replaced with the following:

submit for approval the appropriate edition and Code Cases that were superseded with revised addenda of the Code that is to be used for the re Code Cases and had been approved for use in ac pair, replacement, or modification before start of cordance with (a) may continue to be used.

the work.

N-401-1 5-4-88 Eddy Current Examination, N-429-1 2-23-87 Alternative Rules for Ultra 5-13-91 Section XI, Division 1 3-5-90 sonic Instrument Calibration, N-402-1 3-14-91 Eddy Current Calibration Section XI, Division 1 Standards, Section XI, N-432 2-20-86 Repair Welding Using Auto Division 1 2-20-89 matic or Machine Gas N-408-2 7-24-89 Alternative Rules for Exami o 12-16-91 Tungsten-Arc Welding nation of Class 2 Piping, Sec (GTAW) Temperbead Tech tion XI, Division 1 nique,Section XI, Division 1 N-435-1 7-30-86 Alternative Examination Re Code Case N-408-2 is acceptable subject to the 7-30-89 quirements for Vessels with following condition in addition to those conditions Wall Thickness 2 in. or less, specified in the Code Case: The applicant for an operating license should define the Class 2 piping Section XI, Division 1 subject to volumetric and surface examination in N-437 7-30 86 Use of Digital Readout and the Preservice Inspection for determination of ac 7-30-89 Digital Measurement Devices ceptability by the NRC staff. for Performing Pressure Tests,Section XI, Division 1 N-409-2 7-27-88 Procedure and Personnel N-448 7-27-87 Qualification of VT-2 and 5-13-91 Qualification Requirements 4-30-90 VT-3 Visual Examination Per for Ultrasonic Detection and sonnel,Section XI, Division 1 Sizing of Flaws in Piping Qualification of VT-4 Visual N-449 7-27-87 Welds,Section XI, Division 1 Examination Personnel, Sec 4-30-90 Code Case N-409-2 is acceptable subject to the tion XI, Division 1 following condition in addition to those conditions N-457 12-7-87 Qualification Specimen Notch specified in the Code Case: The applicant should 12-3-90 Location for Ultrasonic Ex give prior notification to the NRC of the intention amination of Bolts and Studs, to use the Code Case. Section XI, Division 1 Alternative Rules for Testing N-458 8-14-90 Magnetic Particle Examina N-415 9-5-85 9-5-88 Pressure Relief Devices, Sec tion of Coated Materials, 8-14-91 tion XI, Division 1 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 5July 1, 1988, is the date that the conditions of the Code Case sion 1 were acceptable to the NRC.

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N-461 11-30-88 Alternative Rules for Piping tions,Section XI, Divisions 1, 8-14-91 Calibration Block Thickness, 2, and 3 Section XI, Division 1 N-490-1 5-13-91 Alternative Vision Test Re Code Case N-461 is acceptable subject to the quirements for Nondestructive following condition in addition to those conditions Examiners, Section XI, specified in the Code Case: Thickness measure Divisions 1, 2, and 3 ments and weld joint contour of the pipe/compo N-491 3-14-91 Alternative Rules for Exami nent must be known and used by the inspector nation of Class 1, 2, 3 and who conducts the UT examination. MC Component Supports of Light-Water Cooled Power N-463-1 3-5-90 Evaluation Procedures and Plants,Section XI, Division 1 Acceptance Criteria for Flaws N-494-1 7-27-92 Pipe Specific Evaluation in Class 1 Ferritic Piping That Procedures and Acceptance Exceed the Acceptance Criteria for Flaws in Class 1 Standards of IWB-3514.2, Ferritic Piping that ExceedsSection XI, Division 1 the Acceptance Standards of N-465 11-30-88 Alternative Rules for Pump IWB-3514.2, Section XI, 8-14-91 Testing,Section XI, Divi Division 1 sion 1 N-471 4-30-90 Accoustic Emission for Suc N-495 12-3-90 Hydrostatic Testing of Relief cessive Inspections, Section Valves,Section XI, Division 1 XI, Division 1 N-496 3-14-91 Helical Coil Threaded Inserts, Code Case N-471 is acceptable subject to the Section XI, Division 1 following conditions in addition to those specified N-498 6 5-13-91 Alternative Rules for 10-Year in the Code Case: The first successive examination Hydrostatic Pressure Testing required by IWB-2420 or IWC-2420 shall be per for Class 1 and 2 Systems, formed. The owner shall evaluate the results of the Section XI, Division 1 on-line acoustic emission monitoring to confirm N-503 2-5-92 Limited Certification of Non that the conclusions from the acoustic emission destructive Examination Per data represent the condition of the flaw indication sonnel,Section XI, Division 1 as estimated from the first successive ISI Examin ation and the data can be correlated with the N-504 4-30-92 Alternative Rules for Repair of known plant operating environment. Class 1, 2, and 3 Austenitic Stainless Steel Piping, Section N-472 3-8-89 Use of Digital Readout and XI, Division 1 12-16-91 Digital Measurement Devices for Performing Pump Vibra 2. ANNULLED CODE CASES tion Testing,Section XI, Divi sion 1 Code Cases that were endorsed by the NRC in a prior version of this guide and were later annulled by N-473 3-8-89 Alternative Rules for Valve action of the ASME should be considered as deleted 12-16-91 Testing,Section XI, Division 1 from the list of acceptable Code Cases as of the date of N-479-1 12-3-90 Boiling Water Reactor (BWR) the ASME action that approved the annulment. Such Main Steam Hydrostatic Code Cases that were annulled on or after November 7

Test,Section XI, Division 1 1, 1978, are listed below by number, effective dates, and title.

N-481 3-5-90 Alternate Examination Re quirements for Cast Austeni 1551 11-6-72 Inservice Inspection of Welds tic Pump Casings,Section XI, N-34 11-20-78 on Nuclear Components, Sec Division 1 11-20-81 tion XI N-485-1 8-14-91 Eddy Current Examination of Coated Ferritic Surfaces as an 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 Alternative to Surface Exam an urgent need for the case.

ination,Section XI, Divi 7 Earlier date-date Code Case was approved by ASME; later sion 1 date-date Code Case was annulled. Where more than two dates appear, the last date is the date that the Code Case was N-489 8-14-90 Alternative Rules for Level III annulled. The middle date (or dates) was the date of reaffirma NDE Qualification Examina- tion of the Code Case.

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1646 8-12-74 Partial Postponement of Cate N-252 11-19-79 Low Energy Capacitive Dis N-72 11-20-78 gory B-C Examination for 7-16-82 charge Welding Method for 1-1-81 Class 1 Components, Section Temporary or Permanent At tachments to Components and C) 1647 N-73 8-12-74 XI Partial Postponement of Cate 11-20-78 gory B-D Examination for Supports,Section III, Division 1, and XI 1-1-81 Class 1 Components,Section XI Code Case N-252 was acceptable subject to the 1730 11-3-75 Acceptance Standards for following condition in addition to those conditions N-112 7-1-79 Class 2 and 3 Components, specified in the Code Case: The applicant should Section XI, Division 1 indicate in the Safety Analysis Report the applica 1738 12-22-75 Examination - Acceptance tion, the material, and the thickness of the mate N-118 11-20-78 Standards for Surface Indica rial to which the strain gage or thermocouple will 1-21-82 tions in Cladding,Section XI be attached by CD welding.

1-21-85 1-21-88 N-278 3-17-80 Alternative Ultrasonic Cali 12-3-90 3-17-838 bration Block Configuration 5-25-838 1-3131 and T-434.3, Section 2-19-86 XI, Division 1 Code Case 1738 (N-118) was acceptable subject 2-19-89 to the following condition in addition to those con 2-19-92 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 Code Case N-278 is acceptable subject to the fol not be applied for the examination of clad surfaces lowing conditions in addition to those conditions of nozzles, including the inner surface of the specified in the Code Case: When a universal cali nozzle-to-vessel insert welds. bration block is used and some or all of the refer ence holes are larger than the reflector holes at 1804 1-14-77 Minimum Section Thickness comparable depths recommended by Article IV, Requirements for Repair of Section V, 1980 edition of the ASME Code, a cor N-167 1-14-80 Nozzles,Section XI, Divi rection factor should be used to adjust the DAC sion 1 level to compensate for the larger reflector holes.

Also, if the reactor pressure vessel was previously N-210 3-20-78 Exemption to Hydrostatic examined by using a conventional block, a ratio 3-20-81 Tests After Repairs, Section between the DAC curves obtained from the two XI, Division 1 blocks should be noted (for reference) with the significant indication data.

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 N-288 8-25-80 Hydrostatic Test Require "Reply" should be replaced with the following: Re 5-25-83 ments for Class 1 and Class 2 pairs to piping, pumps, and valves where the depth Components,Section XI, Di of the repaired cavity does not exceed 25 percent vision 1 of the wall thickness. N-306 1-15-81 Calibration Block Material 4-5-84 Selection, Appendix 1, N-211 3-20-78 Recalibration of Ultrasonic 5-7-87 1-3121,Section XI, Division 3-20-81 Equipment Upon Change of 5-7-90 1 Personnel,Section XI, Divi N-308 9-30-81 Documentation of Repairs sion 1 9-30-84 and Replacements of Compo N-216 3-10-78 Alternative Rules for Reactor 9-30-87 nents in Nuclear Power 7-13-81 Vessel Closure Stud Examina 4-30-90 Plants,Section XI, Division 1 7-13-84 tion,Section XI, Division 1 9-30-90 5-7-87 5-7-90 N-234 1-8-79 Time Between Ultrasonic eCode Case N-278 was inadvertently allowed to expire be 1-21-82 Calibration Checks, Section cause of an ASME administrative error on 3-17-83, its manda 12-5-84 XI, Division 1 tory annulment date. The Code Case without any technical changes was reinstated on 5-25-83. Because of these circum 12-5-87 stances, the Code Case is considered to be in effect during that 12-3-90 period of time.

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N-343 4-2-82 Alternative Scope of Exami N-236 1-8-79 Repair and Replacement of 2-14-85 nation of Attachment Welds 1-21-82 Class MC Vessels,Section XI, 2-14-88 for Examination Categories 12-5-84 Division 1 12-3-90 B-H, B-K-i, and C-C, Section 9-5-85 XI, Division 1 Code Case N-236 was acceptable subject to the N-375-2 4-5-84 Rules for Ultrasonic Examina following conditions in addition to those condi 5-7-87 tion of Bolts and Studs, Sec tions specified in the Code Case:

5-7-90 tion XI, Division 1

a. In paragraph 1.0(a), second sentence-the N-406 4-5-84 Alternative Rules for Replace phrase, "while the plant is not in service," refers to a 5-7-87 ment,Section XI, Division 1 refueling outage.

5-7-90 N-424 7-18-85 Qualification of Visual Exami b. In paragraph 1.0(a), third sentence-the 7-18-88 nation Personnel,Section XI, phrase, "the next scheduled plant outage," refers to Division 1 the next scheduled refueling outage.

N-436-1 12-7-87 Alternative Methods for For clarification, Repair and Replacement of Class 12-3-90 Evaluation of Flaws in Aus MC Vessels means Repair and Replacement of Class tenitic Piping,Section XI, Di- MC Vessels and Components (systems). Acceptance vision 1 of this Code Case in no way infers NRC approval to N-444 9 12-7-87 Preparation of Inspection violate the technical specification or any NRC require 12-3-90 Plans,Section XI, Division 1 ments with regard to breach of containment during re

• pair and replacement procedures while the plant is in N-445 5-7-87 Use of Later Editions of SNT operation.

5-7-90 TC-1A for Qualification of Nondestructive Examination Where a numbered Code paragraph is not Personnel,Section XI, Divi identified by a particular edition of the Code, the Code sion 1, 2, and 3 in effect at the time of the ASME meeting (11-3-78) that approved the Code Case should be governing.

N-446 5-7-87 Recertification of Visual Ex 5-7-90 amination Personnel, Section N-307 1-15-81 Revised Ultrasonic Examina XI, Division 1 4-5-84 tion Volume for Class 1 Bolt 12-5-84 ing, Examination Category B-G-1, When the Examina

3. REVISED CODE CASES tions Are Conducted from the Center-Drilled Hole, Section Code Cases that were endorsed by the NRC in a XI, Division 1 prior version of this guide and were superseded by N-335 4-2-82 Rules for Ultrasonic Examina revised Code Cases on or after November 1, 1978, 2-14-85 tion of Similar and Dissimilar should be considered as not endorsed as of the date of 6-20-85 Metal Piping Welds, Section the ASME action that approved the revised version of XI, Division 1 the Code Cases. These Code Cases that are no longer N-375 11 2-14-83 Rules for Ultrasonic Examina endorsed are listed in the following by number, 4-14-83 tion of Bolts and Studs, Sec effective dates, 10 and title. tion XI, Division 1 11-3-75 Basic Calibration Block for N-375-1 4-14-83 Rules for Ultrasonic Examina 1731 Ultrasonic Examination of 4-5-84 tion of Bolts and Studs, Sec N-113 11-20-78 Welds 10 in. to 13 in. Thick, tion XI, Division 1 1-21-82 12-13-82 Section XI, Division 1 N-401 2-20-84 Eddy Current Examination, 2-23-87 Section XI, Division 1 5-4-88 9

N-402 2-20-84 Eddy Current Calibration Valve stroke times may be documented outside of the IST program. However, if included within the IST program and it 2-23-87 Standard Material, Section becomes necessary to revise the maximum stroke time required 3-5-90 XI, Division 1 by "Supplement 4-Content of IWV Valve Test Tables," it is 3-14-91 not necessary to submit a revised IST program to the NRC solely to document a revision in valve stroke time. N-408 7-12-84 Alternative Rules for Exami

" Earlier date-date Code Case was approved by ASME; 10 5-7-87 nation of Class 2 Piping, Sec later date-date revision of Code Case was approved by ASME. 3-8-89 tion XI, Division 1 Where more than two dates appear, the last date is the date on which the Code Case was revised. The middle date (or dates) "Code Case N-375 was not listed prior to Revision 3 of this was the date of reaffirmation of the Code Case. regulatory guide.

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N-408-1 3-8-89 Alternative Rules for Exami N-485 4-30-90 Eddy Current Examination of 7-24-89 nation of Class 2 Piping, Sec 8-14-91 Coated Ferritic Surfaces as an tion XI, Division 1 Alterantive to Surface Exam n 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 N-490 8-14-90 5-13-91 ination,Section XI, Division 1 Alternative Vision Requirements for Nondestruc Test tive Examiners,Section XI, operating license should define the Class 2 piping Divisions 1, 2, and 3 subject to volumetric and surface examination in the Preservice Inspection for determination of ac N-494 12-3-90 Pipe Specific Evaluation ceptability by the NRC staff. 7-17-92 Procedures and Acceptance Criteria for Flaws in Class 1 Ferritic Piping that Exceeds N-409 12-5-84 Procedure and Personnel the Acceptance Standards of 12-7-87 Qualification for Ultrasonic 1WB-3514.2, Section XI, Detection and Sizing of Division 1 Intergranular Stress Corrosion Cracking in Austenitic Piping Welds,Section XI, Division 1 4. UNACCEPTABLE CODE CASES N-409-1 12-7-87 Procedure and Personnel Code Cases that are not on the approved list of this 7-27-88 Qualification Requirements for guide (paragraph C.1) or other regulatory guides, or Ultrasonic Detection and for which authorization by the Commission has not Sizing of Flaws in Piping been granted, are not acceptable on a generic basis.

Welds,Section XI, Division 1 Code Case N-409-1 was acceptable subject to the D. IMPLEMENTATION following condition in addition to those conditions The purpose of this section is to provide specified in the Code Case: The applicant should information to applicants regarding the use of this give prior notification to the NRC of the intention regulatory guide.

to use the Code Case.

1. Except for those Code Cases that have been annulled by action of the ASME, the NRC staff has N-429 12-5-85 Alternative Rules for Ultra found the Code Cases listed in this regulatory guide 2-23-87 sonic Instrument Calibration, under regulatory position C.1 acceptable for Section XI, Division 1 appropriate use. Other Code Cases may be considered N-435 5-14-86 Alternative Examination Re for use in accordance with footnote 6 of the Codes and 7-30-86 quirements for Vessels with Standards rule, § 50.55a of 10 CFR Part 50.

Wall Thickness 2 in. or Less, 2. Code Cases to be applied during an inspection Section XI, Division 1 interval or Code Cases for a preservice inspection need not be changed because a subsequent revision of the N-436 5-14-86 Alternative Methods for Code Case is listed as the approved version in this 12-7-87 Evaluation of Flaws in Aus guide.

tenitic Piping,Section XI, Di vision 1 3. Code Cases to be applied during an inspection interval or Code Cases for a preservice inspection that N-463 11-30-88 Evaluation Procedures and were previously approved for use may continue to be 3-5-90 Acceptance Criteria for Flaws used even though the Code Case has been subse in Class 1 Ferritic Piping That quently annulled.

Exceed the Acceptance

4. Code Cases on the approved list may be applied Standards of IWB-3514.2, to procedures for an inspection interval and proce Section XI, Division 1 dures for the inservice inspection that were established N-479 7-24-89 Boiling Water Reactor (BWR) prior to the effective date of the Code Case within the 12-3-90 Main Steam Hydrostatic Test, limits specified in the Code Case and applicable regula Section XI, Division 1 tions or recommended in other regulatory guides.

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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