ML013120011
| ML013120011 | |
| Person / Time | |
|---|---|
| Issue date: | 12/31/2001 |
| From: | Office of Nuclear Regulatory Research |
| To: | |
| Norris W | |
| References | |
| -nr, DG-1090 RG-1.084, Rev 32, RG-1.085, Rev 32 | |
| Download: ML013120011 (55) | |
Text
This regulatory guide is being issued in draft form to involve the public in the early stages of the development of a regulatory position in this area. It has not received complete staff review or approval and does not represent an official NRC staff position.
Public comments are being solicited on this draft guide (including any implementation schedule) and its associated regulatory analysis or value/impact statement. Comments should be accompanied by appropriate supporting data. Written comments may be submitted to the Rules and Directives Branch, Office of Administration, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001. Comments may be submitted electronically or downloaded through the NRCs interactive web site at <WWW.NRC.GOV> through Rulemaking. Copies of comments received may be examined at the NRC Public Document Room, 11555 Rockville Pike, Rockville, MD. Comments will be most helpful if received by March 25, 2002.
Requests for single copies of draft or active regulatory guides (which may be reproduced) or for placement on an automatic distribution list for single copies of future draft guides in specific divisions should be made to the U.S. Nuclear Regulatory Commission, Washington, DC 20555, Attention: Distribution Services Section, or by fax to (301)415-2289; or by email to DISTRIBUTION@NRC.GOV. Electronic copies of this draft guide are available through NRCs interactive web site (see above), on the NRCs web site <WWW.NRC.GOV> in the Reference Library under Regulatory Guides, and in NRCs Electronic Reading Room at the same web site, under Accession Number ML013120011.
U.S. NUCLEAR REGULATORY COMMISSION December 2001 OFFICE OF NUCLEAR REGULATORY RESEARCH Division 1 DRAFT REGULATORY GUIDE
Contact:
W.E. Norris (301)415-6796 DRAFT REGULATORY GUIDE DG-1090 (Proposed Revision 32 of Regulatory Guides 1.84 and 1.85 Combined)
DESIGN, FABRICATION, AND MATERIALS CODE CASE ACCEPTABILITY, ASME SECTION III A. INTRODUCTION General Design Criterion (GDC) 1, Quality Standards and Records, of Appendix A, General Design Criteria for Nuclear Power Plants, to 10 CFR Part 50, Domestic Licensing of Production and Utilization Facilities, requires, in part, that structures, systems, and components important to safety be designed, fabricated, erected, and tested to quality standards commensurate with the importance of the safety function to be performed. Where generally recognized codes and standards are used, Criterion 1 requires that they be identified 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.
Criterion 30, Quality of Reactor Coolant Pressure Boundary, of Appendix A requires, in part, that components that are part of the reactor coolant pressure boundary be designed, fabricated, erected, and tested to the highest quality standards practical.
Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Processing 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.
Provisions of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (BPV) Code have been used since 1971 as one part of the framework to establish the necessary design, fabrication, construction, testing, and performance requirements for structures, systems, and components important to safety. ASME standards committees
1 Copies may be obtained from the American Society of Mechanical Engineers, Three Park Avenue, New York, NY 10016-5990. Phone (212)591-8500; fax (212)591-8501; www.asme.org.
2 develop, among other things, improved methods for the construction and inservice inspection (ISI) of ASME Class 1, 2, 3, MC (metal containment) and CC (concrete containment) nuclear power plant components. A broad spectrum of stakeholders participate in the ASME process, which helps to ensure that the various interests are considered.
In 10 CFR 50.55a, Codes and Standards, paragraph (c), Reactor Coolant Pressure Boundary, requires, in part, that components of the reactor coolant pressure boundary be designed, fabricated, erected, and tested in accordance with the requirements for Class 1 components of Section III, Rules for Construction of Nuclear Power Plant Components,1 of the ASME BPV Code or equivalent quality standards.
The ASME publishes a new edition of the BPV Code, which includesSection III, every three years, and new addenda every year. The latest editions and addenda of Section III that have been approved for use by the NRC are referenced in paragraph 50.55a(b).
The ASME also publishes Code Cases quarterly. Code Cases provide alternatives developed and approved by ASME or explain the intent of existing Code requirements.
This regulatory guide identifies the Code Cases that have been determined by the NRC to be acceptable alternatives to applicable parts of Section III.Section III Code Cases not yet endorsed by the NRC may be implemented through 10 CFR 50.55a(a)(3), which permits the use of alternatives to the Code requirements referenced in 10 CFR 50.55a provided that the proposed alternatives result in an acceptable level of quality and safety, and their use is authorized by the Director of the Office of Nuclear Reactor Regulation.
The use of Code Cases contained in this guide is voluntary. The ASME Code is incorporated into 10 CFR 50.55a by reference. Code Cases approved by the NRC provide an acceptable voluntary alternative to the mandatory ASME Code provisions.
Thus, generic approval of a Code Case through this guide of an alternative to compliance with these provisions must be accomplished through an amendment to 10 CFR 50.55a. The NRC plans to publish for public comment an amendment to 10 CFR 50.55a that would incorporate this guide by reference. The proposed amendment will state the requirements governing the use of Code Cases. Because of the continuing change in the status of Code Cases, periodic updates to 10 CFR 50.55a and this guide are planned to accommodate new Code Cases and any revisions of existing Code Cases.
The information collections contained in this draft regulatory guide are covered by the requirements of 10 CFR Part 50, which were approved by the Office of Management and Budget, approval number 3150-0011. If a means used to impose an information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
B. DISCUSSION Previously, Regulatory Guide 1.84 was titled Design and Fabrication Code Case Acceptability, ASME Section III, Division 1, and it listed only the Section III Code Cases
2 Except for Code Cases pertaining to high temperature gas-cooled reactors;Section III, Division 2, requirements not endorsed by the NRC; liquid metal; and submerged spent fuel waste casks 3
oriented to design and fabrication. Companion Regulatory Guide 1.85, Materials Code Case Acceptability, ASME Section III, Division 1, listed the Section III Code Cases oriented to materials and testing. Beginning with this revision, all Section III Code Cases that have been approved for use by the NRC will be listed in one guide. Hence, the title of Regulatory Guide 1.84 has been changed to Design, Fabrication, and Materials Code Case Acceptability, ASME Section III. It should be noted that with this Revision 32, Division 1 has been deleted from the title. Previous versions of the guide contained some Division 2 Code Cases, and this guide contains some Division 3 Code Cases.
Hence, the title change reflects the revised scope of Regulatory Guide 1.84. Regulatory Guide 1.85 will no longer be updated, but it will not be withdrawn at this time, as some Code Cases contained in Regulatory Guide 1.85 continue to be used.
For this Revision 32 of Regulatory Guide 1.84, the NRC staff reviewed the Section III Code Cases listed in Supplement 4 to the 1992 Edition through Supplement 11 to the 1998 Edition.2 Appendix A to the guide lists the supplements reviewed, the edition, and the Board on Nuclear Codes and Standards approval date. Appendix B is a numerical listing of the Code Cases addressed in these supplements. The Code Cases are listed in five tables: Table 1, Acceptable Section III Code Cases, contains the Code Cases that are acceptable to the NRC for application in the design and construction of light-water-cooled nuclear power plants; Table 2, Conditionally Acceptable Section III Code Cases, contains those Code Cases that are acceptable provided that they are used with the identified limitations or modifications, i.e., the Code Case is generally acceptable but the NRC has determined that the alternative requirements must be supplemented in order to provide an acceptable level of quality and safety; Table 3, Annulled Unconditionally Approved Section III Code Cases, contains the Code Cases that have been annulled by the ASME; Table 4, Annulled Conditionally Acceptable Section III Code Cases, contains the Code Cases that the NRC determined to be acceptable provided that they are used with the identified limitations or modifications, but were subsequently annulled by the ASME; Table 5,Section III Code Cases That Have Been Superseded by Revised Code Cases on or After July 1, 1974, lists Code Cases that have been superseded through revision. Code Cases that the NRC determined to be unacceptable will be listed in a new regulatory guide, which is being developed as DG-1112, ASME Code Cases Not Approved for Use. It should be noted that Tables 1-5 provide comprehensive lists of Section III Code Cases since many older Code Cases are still in use; i.e.,Section III, Division 1, applies only to new construction (the edition and addenda used in the construction of a plant were selected based upon the date of the construction permit and are not changed thereafter, except voluntarily by the licensee).
Code Cases provide alternatives to existing Code requirements that were developed and approved by the ASME. The NRC plans to incorporate by reference into 10 CFR 50.55a the Code Cases listed as approved in Tables 1 and 2 of this guide.
These Code Cases may be used voluntarily by licensees as an alternative to compliance with ASME Code provisions incorporated by reference into 10 CFR 50.55a.
The proposed amendment to 10 CFR 50.55a being developed would require that when a licensee initially implements a Code Case, the most recent version of that Code
4 Case as listed in Tables 1 and 2 be implemented. If a Code Case is implemented by a licensee and a later version of the Code Case is incorporated by reference into 10 CFR 50.55a and listed in Tables 1 and 2 during the licensees present ISI interval, that licensee will be able to use either the later version or the previous version (unless a specific limitation or condition is placed on the use of that Code Case, in which case the modification or limitation applies). Licensees who choose to continue use of the Code Case during the subsequent ISI interval will be required to implement the latest version incorporated by reference into 10 CFR 50.55a and listed in Tables 1 and 2.
Code Cases may be annulled because experience has shown that an examination or testing method is inadequate or the application for which it was specifically developed no longer exists. If a Code Case is incorporated by reference into Section 50.55a and later annulled by the ASME, the NRC will amend 10 CFR 50.55a and this guide to remove the approval of the annulled Code Case. Licensees should not begin to implement annulled Code Cases in advance of such rulemaking. After a Code Case is annulled and 10 CFR 50.55a and this guide are amended, licensees may not implement that Code Case for the first time. However, a licensee who implemented the Code Case prior to annulment may continue to use that Code Case (i) unless 10 CFR 50.55a specifically prohibits further use of the annulled Code Case or (ii) until the licensee voluntarily updates itsSection III Code of record.
With regard to the use of any Code Case, it is the responsibility of the user to make certain that no regulatory requirements are violated and that there are no conflicts with other limitations resulting from Code Case usage.
C. REGULATORY POSITION
- 1.
ACCEPTABLE CODE CASES The Code Cases listed in Table 1 below are acceptable to the NRC for application in the design and construction of components and their supports for water-cooled nuclear power plants. The ASME issuesSection III Code Cases quarterly in supplements to a specific edition, i.e., a new edition of Section III is published every three years, and supplements are published quarterly. Hence, there are 12 supplements to each edition. To distinguish new and revised Code Cases from those approved in previous versions of the guide, new and revised Code Cases are shaded. The shading will assist in focusing attention during the public comment period on the changes to the guide. Column 3 of Table 1 lists the supplement and edition in which each Code Case was published (e.g., 7/95E means Code Case Supplement 7 to the 1995 Edition).
5 TABLE 1 - ACCEPTABLE SECTION III CODE CASES CODE CASE NUMBER TABLE 1 ACCEPTABLE SECTION III CODE CASES SUPPLEMEN T/EDITION N-4-11 Special Type 403 Modified Forgings or Bars,Section III, Division 1, Class 1 and CS, 5/98E N-7-1 High Yield Strength Steel,Section III, Division 1, Class 1 9/98E N-20-4 SB-163, Cold Worked UNS N08800; and SB-163 UNS N06600, UNS N06690, and UNS N08800 to Supplementary Requirements S2 of SB-163,Section III, Division 1, Class 1 4/98E N-60-5 Material for Core Support Structures,Section III, Division 1 9/95E N-122-2 Procedure for Evaluation of the Design of Rectangular Cross Section Attachments on Class 1 Piping,Section III, Division 1 8/98E N-131-1 (1759-1)
Material for Internal Pressure Retaining Items for Pressure Relief Valves,Section III, Division 1, Class 1, 2, and 3 9/98E N-133-3 Use of SB-148 Alloys 952 and 954,Section III, Division 1, Class 3 8/98E N-154-1 Projection Resistance Welding of Valve Seats,Section III, Division 1, Classes 1, 2, and 3 9/98E N-160-1 Finned Tubing for Construction,Section III, Division 1 8/98E N-171 Postweld Heat Treatment of P-No. 1 Material,Section III, Division 2 5/92E N-192-2 Use of Braided Flexible Connectors,Section III, Division 1, Class 2 and 3 5/98E N-205 Use of Ductile Iron SA-395,Section III, Division 1, Class 3 5/98E N-208-2 Fatigue Analysis for Precipitation Hardening Nickel Alloy Bolting Material to Specification SA-637 N07718 for Class 1 Construction,Section III, Division 1 5/98E N-213 Welded Radial Shear Bar Assemblies,Section III, Division 2 5/98E N-243 Boundaries Within Castings Used for Core Support Structures,Section III, Division 1, Class CS 9/95E N-304-4 Use of 20Cr-25Ni-6Mo (Alloy UNS N08366) Plate, Sheet, Strip, and Welded Pipe, Class 2 and 3,Section III, Division 1 4/98E N-315 Repair of Bellows,Section III, Division 1 9/98E N-318-5 Procedure for Evaluation of the Design of Rectangular Cross Section Attachments on Class 2 or 3 Piping,Section III, Division 1 9/95E
CODE CASE NUMBER TABLE 1 ACCEPTABLE SECTION III CODE CASES SUPPLEMEN T/EDITION 6
N-319-3 Alternate Procedure for Evaluation of Stresses in Butt Welding Elbows in Class 1 Piping,Section III, Division 1 8/98E N-329 Examination of Bar Material,Section III, Division 1, Class 1 6/98E N-345-1 Attachment of AMS 5382 Alloy 31 Seat Rings by Friction Welding,Section III, Division 1, Classes 1, 2, and 3 10/98E N-351 Use of Subsize Charpy V-Notch Specimens,Section III, Division 1 8/98E N-369 Resistance Welding of Bellows,Section III, Division 1 10/98E N-373-1 Alternative PWHT Time at Temperature for P-No. 5 Material,Section III, Division 1, Classes 1, 2, and 3 1/98E N-387 Certification of Level III NDE Examiner,Section III, Division 2 1/98E N-391-2 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attachments on Class 1 Piping,Section III, Division 1 1/98E N-392-3 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attachments on Classes 2 and 3 Piping,Section III, Division 1 12/95E N-394 Restricting Lift to Achieve Reduced Relieving Capacities of Full Lift, Nozzle Type, and Flat Seated Safety and Safety Relief Valves for Compressible Fluid Applications,Section III, Division 1, Classes 2 and 3 12/95E N-395 Laser Welding,Section III, Division 1 1/98E N-405-1 Socket Welds,Section III, Division 1 12/95E N-438-1 UNS N08367,Section III, Division 1, Class 2 and 3 Construction Reinstated 5/95E N-439-1 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 10/98E N-440-1 Use of 20Cr-18Ni-6Mo (Alloy UNS J93254) Castings, Class 2 and 3 Construction,Section III, Division 1 10/98E N-441-2 Use of 20Cr-18Ni-6Mo (Alloy UNS S31254) Fittings, Class 2 and 3 Construction,Section III, Division 1 10/98E N-452 Specialized Subcontracted Welding Process (Electron Beam Welding),Section III, Division 1 10/98E
CODE CASE NUMBER TABLE 1 ACCEPTABLE SECTION III CODE CASES SUPPLEMEN T/EDITION 7
N-453-3 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N08925) for Class 2 and 3 Construction,Section III, Division 1 1/98E N-454-1 Nickel-Chromium-Molybdenum-Copper Stainless Steels (UNS N08925 and N08926) Wrought Fittings for Class 2 and 3 Construction,Section III, Division 1 10/98E N-455-1 Nickel-Chromium-Molybdenum-Copper Stainless Steels (UNS N08925 and N08926) Forged Flanges and Fittings for Class 2 and 3,Section III, Division 1 10/98E N-464 Laser Welding of Lap Joints,Section III, Division 1, Classes 2 and 3 Construction 10/98E N-469-1 Martensitic Stainless Steel for Class 1, 2, and 3 Components,Section III, Division 1 10/98E N-493 Alternative Radiographic Acceptance Criteria for Vessels Used as Shipping Casks,Section III, Division 1, Class 1 6/98E N-505 Alternative Rules for the Examination of Butt Welds Used as Closure Welds for Electrical Penetration Assemblies in Containment Structures,Section III, Division 1 12/95E N-511 Design Temperature for Atmospheric and 0-15 psi Storage Tanks,Section III, Division 1 4/92E N-520-1 Alternative Rules for Renewal of N-type Certificates for Plants Not in Active Construction,Section III, Division 1 10/95E N-525 Design Stress Intensities and Yield Strength Values for UNS N06690 With a Minimum Specified Yield Strength of 30 ksi, Class 1 Components,Section III, Division 1 6/98E N-539 UNS N08367 in Class 2 and 3 Valves,Section III, Division 1 12/95E N-548 Air Cooling of SA-182 Grades F304, F304L, F316, F316L Forgings Instead of Liquid Quenching After Solution Heat Treatment, Class 1, 2, and 3,Section III, Division 1 4/95E N-550 Alternative Rules for Examination of Welds in Instrument Tubing, Class 1 and 2,Section III, Division 1 1/98E N-558 Stamping of Class 2 Vessels Fabricated to Subsection NB,Section III, Division 1 6/95E N-564-2 UNS J93380, Alloy CD3MWCuN, Class 2 and 3 Construction,Section III, Division 1 8/98E N-570 Alternative Rules for Linear Piping and Linear Standard Supports for Class 1, 2, 3, and MC 6/95E
CODE CASE NUMBER TABLE 1 ACCEPTABLE SECTION III CODE CASES SUPPLEMEN T/EDITION 8
N-572 Use of SB-425 (UNS N08825) Bar and Rod for Class 1 Construction,Section III, Division 1 7/95E N-579 Use of Nonstandard Nuts, Class 1, 2, and 3, MC, CS Components and Supports Construction,Section III, Division 1 10/95E N-580-1 Use of Alloy 600 With Columbium Added,Section III, Division 1
1/98E N-594 Repairs to P-4 and P-5A Materials for Pumps and Valves Without Postweld Heat Treatment,Section III, Division 1 12/95E N-596 Use of Alternative Reference Specimens,Section III, Division 1 12/95E N-607 Guidance on Implementation of NS Certificate of Accreditation,Section III, Division 1 5/98E N-608 Applicable Code Edition and Addenda, NCA-1140(a)(2),
Section III, Division 1 1/98E N-610 Alternative Reference Stress Intensity Factor (K1R) Curve for Class Components,Section III, Division 1 2/98E N-611 Use of Stress Limits as an Alternate to Pressure Limits Subsection NC/ND-3500,Section III, Division 1 2/98E N-620 Rules for Class 1 Type M Pumps,Section III, Division 1 4/98E N-621 Ni-Cr-Mo Alloy (UNS N06022) Welded Construction to 800F,Section III, Division 1 4/98E N-625 Ni-Cr-Mo Alloy (UNS N06059) Welded Construction to 800F,Section III, Division 1 5/98E N-631 Use of Fracture Toughness Test Data to Establish Reference Temperature for Pressure Retaining Materials Other Than Bolting for Class 1 Vessels,Section III, Division 1 6/98E N-632 Use of ASTM A 572, Grades 50 and 65 for Structural Attachments to Class CC Containment Liners,Section III, Division 2 7/98E N-635 Use of 22Cr-5Ni-3Mo-N (Alloy UNS S31803) Forgings, Plate, Bar, Welded and Seamless Pipe, and/or Tube, Fittings, and Fusion Welded Pipe With Addition of Filler Metal, Classes 2 and 3,Section III, Division 1 6/98E
CODE CASE NUMBER TABLE 1 ACCEPTABLE SECTION III CODE CASES SUPPLEMEN T/EDITION 9
N-636 Use of 18Cr-13Ni-3Mo (Alloy UNS S31703), 19Cr-15Ni-4Mo (Alloy UNS S31725), and 18.5Cr-15.5Ni-4.5Mo-N (Alloy UNS S31726) Forgings, Seamless Tubing, Plate, Welded Tubing, Welded and Seamless Pipe, Welded Pipe With Addition of Filler Metal and Fittings, Classes 2 and 3,Section III, Division 1
6/98E N-637 Use of 44Fe-25Ni-21Cr-Mo (Alloy UNS N08904) Plate, Bar, Fittings, Welded Pipe, and Welded Tube, Classes 2 and 3,Section III, Division 1 6/98E N-642 Alternative Rules for Progressive Liquid Penetrant Examination of Groove Welds In P-No. 8 Materials 3/16 in. (5 mm) Thick and Less Made by Autogenous Machine or Automatic Welding,Section III, Division 1 9/98E N-644 Weld Procedure Qualification for Procedures Exempt From PWHT in Class 1, 2, and 3 Construction,Section III, Division 1 10/98E N-646 Alternative Stress Intensification Factors for Circumferential Fillet Welded or Socket Welded Joints for Class 2 or 3 Piping,Section III, Division 1 11/98E
- 2.
CONDITIONALLY ACCEPTABLE SECTION III CODE CASES The Code Cases listed in Table 2 below are acceptable to the NRC for application in the design and construction of components and their supports for water-cooled nuclear power plants within the limitations imposed by the NRC. Unless otherwise stated, limitations imposed by the NRC are in addition to the conditions specified in the Code Case. The ASME issuesSection III Code Cases quarterly in supplements to a specific edition; i.e., a new edition of Section III is published every three years, and supplements are published quarterly. Hence, there are 12 supplements to each edition. To distinguish new and revised Code Cases from those approved in previous versions of the guide, the new and revised Code Cases are shaded. The shading will assist in focusing attention during the public comment period on the changes to the guide. Column 3 of the table lists the supplement and edition in which each Code Case was published (e.g., 7/95E means Code Case Supplement 7 to the 1995 Edition).
TABLE 2 - CONDITIONALLY ACCEPTABLE SECTION III CODE CASES CODE CASE NUMBER TABLE 2, CONDITIONALLY ACCEPTABLE CODE CASES SUPPLEMEN T/EDITION TITLE / CONDITION N-62-7 Internal and External Valve Items,Section III, Division 1, Classes 1, 2, and 3 8/98E
CODE CASE NUMBER TABLE 2, CONDITIONALLY ACCEPTABLE CODE CASES SUPPLEMEN T/EDITION TITLE / CONDITION 10 The Code requires that Class 1 and Class 2 valve manufacturers meet the provisions of NCA-4000, Quality Assurance. Class 3 valve manufacturers must also meet the provisions of NCA-4000 because all Code Class valve items are subject to the licensees 10 CFR 50, Appendix B approved QA program. [Note: condition contained in Revision 31 of this guide].
CODE CASE NUMBER TABLE 2, CONDITIONALLY ACCEPTABLE CODE CASES SUPPLEMEN T/EDITION TITLE / CONDITION 11 N-71-17 Additional Materials for Subsection NF, Class 1, 2, 3, and MC Component Supports Fabricated by Welding,Section III, Division 1 6/98E (1) The maximum measured ultimate tensile strength (UTS) of the component support material must not exceed 170 Ksi in view of the susceptibility of high-strength materials to brittleness and stress corrosion cracking.
(2) 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 must specify impact testing for the material. For these cases, it must be demonstrated by the applicant that: (a) the impact test results for the material meet Code requirements, (b) the material is not subject to stress corrosion cracking by virtue of the fact that: (i) a corrosive environment is not present and (ii) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sustained loads in service.
(3) In the last sentence of paragraph 5.3, reference must be made to paragraph 4.5.2.2, Alternate Atmosphere Exposure Time Periods Established by Test, of the AWS D.1.1 Code for the evidence presented to and accepted by the Authorized Inspector concerning exposure of electrodes for longer periods of time. (4) Paragraph 16.2.2 is not acceptable as written and must be replaced with the following: When not exempted by 16.2.1 above, the postweld heat treatment must be performed in accordance with NF-4622 except that ASTM A-710 Grade A Material must be at least 1000F (540C) and must not exceed 1150F (620C) for Class 1 and Class 2 material and 1175F (640C) for Class 3 material. (5) The new holding time at temperature for weld thickness (nominal) must 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. (6) The fracture toughness requirements as listed in this Code Case apply only to piping supports and not to Class 1, Class 2, and Class 3 component supports. [Note: Conditions contained in Revision 31 of this guide.]
CODE CASE NUMBER TABLE 2, CONDITIONALLY ACCEPTABLE CODE CASES SUPPLEMEN T/EDITION TITLE / CONDITION 12 N-155-2 Fiberglass Reinforced Thermosetting Resin Pipe,Section III, Division 1 8/98E (1) The design temperature for spray pond piping must be 100C (212F).
(2) The allowable design stress must be the value obtained from the minimum hydrostatic design basis (HDB) in Table 3611-1 of Code Case N-155-2 (Procedure A or B) or the value determined as one-sixth of the stress obtained from a short-time burst test for the pipe being qualified, whichever is lower. The short-time burst strength must be determined by bursting the pipe (ASTM D-1599-74) using free-end mounting after it has been exposed to 105 pressure cycles from atmospheric to design pressure.
(3) The value of K in equation 9 of paragraph 3652 must be limited to 1.2 unless it can be demonstrated that with the use of a large value of K1 the functional capability of the system will not be impaired during upset and emergency conditions. (4) RTR piping must be uninsulated or uncovered and installed under conditions that make it readily accessible for inspection. (5) Preoperational and inservice inspections must be as follows: (a) During the preoperational testing period, tests must be made to verify that the piping is free of vibration induced by weather conditions or water flow that could fatigue the piping prematurely. (b) Fiberglass-reinforced piping components must be inspected in accordance with ASME Code,Section XI, for Code Class 3 components. In addition, all pipe supports must be inspected. (c) Inspection frequency for piping must be increased to once annually if an exterior weather-resistant coating is not provided. [NOTE: The above conditions were contained in Revision 31 but were not specifically listed; i.e., the condition stated that the applicant must satisfy the additional limitations specified in Regulatory Guide 1.72, Spray Pond Piping Made from Fiberglass-Reinforced Thermosetting Resin.
CODE CASE NUMBER TABLE 2, CONDITIONALLY ACCEPTABLE CODE CASES SUPPLEMEN T/EDITION TITLE / CONDITION 13 N-249-13 Additional Materials for Subsection NF, Class 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 9/95E (1) The fracture toughness requirements apply only to piping supports and not to Class 1, Class 2, and Class 3 component supports.
(2) The following is to be added to paragraph (e) of the Code Case:
(a) For these cases, it must be demonstrated by the Owner that: (i) the impact test results for the material meet Code requirements, and (ii) the material is not subject to stress corrosion cracking by virtue of the fact that: a corrosive environment is not present; the component that contains the material has essentially no residual stresses or assembly stresses; and it does not experience frequent sustained loads in service. [Note: conditions contained in Revision 31 of this guide].
N-292 Depositing Weld Metal Prior to Preparing Ends for Welding,Section III, Division 1, Class 1, 2, and 3 12/95E Class 3 piping that is longitudinally welded and that has a weld efficiency factor of 1.0 as selected from Table ND-3613.4-1, Weld Joint Efficiency Factor, must receive a 100 percent volumetric examination (RT or UT) of the deposited weld metal in accordance with the requirements of ND-5000, Examination. [Note: condition contained in Revision 31 of this guide].
N-500-1 Alternative Rules for Standard Supports for Class 1, 2, 3, and MC,Section III, Division 1 1/98E (1) The requirements of NF-3330, High Cycle Fatigue Design for Class 1, must be met for Class 1 Standard Supports for fatigue consideration.
(2) The requirements of NF-3225, Design of Bolting, and NF-3324.6, Webs, Flanges, and Stiffeners, must be met for bolted joints.
CODE CASE NUMBER TABLE 2, CONDITIONALLY ACCEPTABLE CODE CASES SUPPLEMEN T/EDITION TITLE / CONDITION 14 N-626 Use of Plastic Analysis for the Design of Type B Containment Components for Nuclear Material Transportation Casks,Section III, Division 3 5/98E
- 1. For the acceptability of a design by analysis, Paragraph WB-3211, Requirements for Acceptability, of Section III, Division 3, Subsection WB, Class TP (Type B)
Containment, Subparagraphs (a) through (d) must be applied.
- 2. There is a typographical error in the title of Paragraph (a)(2) of the Code Case. Paragraph WB-3277 does not exist. Paragraph WB-3227, Applications of Inelastic Analysis Procedures, of Section III, Division 3, Subsection WB, Class TP (Type B) Containment, is to be used.
- 3. The first paragraph of WB-3324, Design for Local Puncture Associated with a Hypothetical Accident Condition, of Section III, Division 3, Subsection WB, Class TP (Type B) Containment, must be applied. The second paragraph of WB-3324 may be applied. In lieu of the third paragraph of WB-3324, the following may be applied: In lieu of the application of the equation for outer shell thickness (treq) the response of the containment boundary to puncture test loadings may be evaluated using plastic analysis according to the rules in Appendix F, Rules for Evaluation of Service Loadings with Level D Service Limits.
- 3.
ANNULLED UNCONDITIONALLY APPROVED SECTION III CODE CASES The Code Cases listed in the table below were previously unconditionally approved by the NRC and have been annulled by the ASME. The ASME issuesSection III Code Cases quarterly in supplements to a specific edition; i.e., a new edition of Section III is published every three years, and supplements are published quarterly.
Hence, there are 12 supplements to each edition. Column 3 of the table lists the ASME annulment date.
15 TABLE 3 - ANNULLED UNCONDITIONALLY APPROVED SECTION III CODE CASES CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE N-1-7 (1332-7)
Requirements for Steel Forgings,Section III, Division 1 7/1/82 N-2 (1334-3)
Requirements for Corrosion-Resisting Steel Bars and Shapes,Section III 1/1/81 N-3-10 (1335-10)
Requirements for Bolting Materials,Section III 9/16/84 N-5-1 Nickel Chromium Age Hardenable Alloys (Alloy X750),Section III, Division 1, Classes 1, 2, 3, MC, and CS 12/13/85 N-6 (1345-2)
Requirements for Nickel-Molybdenum-Chromium-Iron Alloys,Section III 3/1/79 N-9-4 (1395-4)
SA-508, Class 2 Forgings with Modified Manganese Content,Section III 7/1/82 N-10 (1407-3)
Time of Examination for Classes, 1, 2, and 3,Section III Vessels 9/17/87 N-15 (1456-2)
Substitution of Ultrasonic Examination for Progressive Penetrant or Magnetic Particle Examination of Partial Penetration and Oblique Nozzle Attachment Welds,Section III 3/1/79 N-17 (1474-1)
Integrally Finned Tubes for Section III 1/21/91 N-22 (1498-1)
SA-508-Class 2 and 3, Minimum Tempering Temperature,Section III 7/1/82 N-24 (1516-2)
Welding of Seats or Minor Internal Permanent Attachments in Valves for Section III Applications 1/1/80 N-26 (1527)
Integrally Finned Tubes,Section III 1/21/91 N-30-1 (1539-1)
Metal Bellows and Metal Diaphragm Stem Sealed Valves,Section III, Division 1, Classes 1, 2, and 3 1/1/81 N-32-3 (1541-3)
Hydrostatic Testing of Embedded Class 2 and Class 3 Piping for Section III, Division 1 Construction 7/1/79 N-33 (1542-1)
Type 403 Forgings or Bars for Bolting Material,Section III 1/21/85 N-35-1 (1552-1)
Design by Analysis of Section III, Class 1 Valves 7/1/79
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 16 N-37-3 (1557-3)
Steel Products Refined by Secondary Remelting,Section III and VIII, Division 1 and 2 7/1/82 N-41 (1571)
Additional Material for SA-234 Carbon Steel Fittings,Section III 1/21/85 N-43 (1578)
SB-167 Nickel-Chromium-Iron (Alloy 600) Pipe or Tube,Section III 7/1/82 N-46 (1588)
Electro-Etching of Section III Code Symbols 3/19/82 N-47-33 Class 1 Components in Elevated Temperature Service,Section III, Division 1 7/1/96 N-48-2 Fabrication and Installation of Elevated Temperature Components,Section III, Division 1 7/1/96)
N-49-4 Examination of Elevated Temperature Nuclear Components,Section III, Class 1 7/1/96)
N-50-1 Testing of Elevated Temperature Components,Section III, Division 1, Class 1 7/1/96)
N-51-2 Protection Against Overpressure of Elevated Temperature Components,Section III, Division 1, Class 1 7/1/96)
N-55-1 (1609)
Inertia and Continuous Drive Friction Welding,Section III, Division 1 4/5/87 N-56 (1612)
Use of Type 308 Stainless Steel Rod and Bar for Section III, Class 1, 2, 3, and CS Construction 7/1/78 N-61 (1620)
Stress Category for Partial Penetration Welded Penetrations,Section III, Class Construction 1/8/82 N-65-1 (1626-1)
Normalized and Tempered 1-1/4 Cr Low Alloy Steel Forgings,Section I and III 1/21/85 N-66-1 (1630-1)
External Pressure Charts for High Yield Strength Carbon Steels and Low alloy Steels, (Yield Strength above 38 Ksi to 60 Ksi Inclusive) For Section III, Class 1, 2, 3, and MC 12/5/87 N-68 (1634-2)
Use of SB-359 for Section III, Division, 1, Class 3 Construction 7/1/78 N-77 (1660)
Overpressure Protection Under Emergency Operating Conditions for Section III, Class 1 7/1/77 N-81 (1665)
Pressure-Temperature Ratings for Class 1 Valves Made from 5 Cr-1/2 Mo,Section III 7/1/78
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 17 N-82 (1677)
Clarification of Flange Design Loads,Section III, Class 1, 2, and 3 3/1/79 N-84 (1681-1)
Organizations Accepting Overall Responsibility for Section III Construction 3/1/79 N-90 (1692)
Rules for Design of Welded Class 1 Pumps 7/1/78 N-94 (1700)
Determination of Capacities of Liquid Relief Valves,Section III, Division 1, Class 1, 2, and 3 3/19/82 N-95-2 (1701-2)
Determination of Capacities of Vacuum Relief Valves,Section III, Division 1, Classes 2, 3, and MC and Division 2 Concrete Containments 7/9/82 N-96-1 (1702-1)
Flanged Valves Larger than 24 inches for Section III, Division 1, Class 1, 2, and 3 Construction 1/1/80 N-101 (1712)
Nameplates and Stamping for Section III, Division 1, Class 1, 2, 3 and MC Construction as Referenced in NA-8300 3/1/79 N-102-2 Postweld Heat Treatment of P-1 Material,Section III, Class MC 6/30/84 N-107-1 (1722-1)
Vacuum, Carbon Deoxidized SA-508 Forgings,Section III, Division 1 1/8/82 N-108 (1724)
Deviation from the Specified Silicon Ranges in ASME Material Specifications,Section III, Division 1, and VIII, Division 1 and 2 7/1/78 N-109 (1726)
Refinement of Low Alloy Steel Heat Affected Zone Under Overlay Cladding,Section III, Division 1, Class 1 Components 3/1/79 N-111 (1729)
Minimum Edge Distance-Bolting for Section III, Division 1, Class 1, 2, and 3 and MC Construction of Component Supports 3/1/79 N-114 (1732)
Hardsurfaced Valves with Inlet Connections less than 2-in.
Nominal Pipe Size for Section III, Division 1, Class 1 and 2 Construction 1/1/79 N-115 (1733)
Evaluation of Safe Shut Down Earthquake Loadings for Section III, Division 1, Class MC Containment Vessels 1/1/78 N-119-4 (1739-4)
N-119-6 Pump Internal Items,Section III, Division 1, Class 1, 2, and 3 12/1/83 3/14/94 N-121 (1744)
Carbon Steel Pipe Flanges Larger than 24 in.,
Section III, Division 1, Class 2 and 3 Construction 3/1/79
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 18 N-123 (1746)
Leak Testing of Seal Welds,Section III, Division 1, Class 1, 2, and 3 Construction 3/1/79 N-124 (1747)
Requirements for Martensitic Stainless Forgings with 13%
Chromium and 4% Nickel,Section III, Division 1 7/13/87 N-125 (1748)
Low Carbon Austenitic Stainless Steel Pipe Welded With Filler Metal,Section III, Division 1, Construction 7/1/78 N-126 (1754)
Hard Surfacing by the Spray-Fuse Method,Section III, Class 1, 2, and 3 Construction 7/1/88 N-127 (1755-1)
Alternative Rules for Examination of Welds in Piping,Section III, Class 1 and 2 Construction 2/20/92 N-139 Testing of Electroslag Wire and Flux for Class 1, 2, 3, MC, and CS Construction,Section III, Division 1 1/1/79 N-140 (1772)
Use of SA-453 Bolts in Service Below 800F Without Stress Rupture Tests,Section III, Division 1 12/31/85 N-142-1 (1774-1)
Minimum Wall Thickness for Class 2 and 3 Valves,Section III, Division 1 1/1/80 N-147 (1781)
Use of Modified SA-487 Grade CA6NM,Section III, Division 1, Class 1, 2, 3, MC or CS 7/1/78 N-148 (1782)
Use of Copper-Nickel Alloy 962 for Castings,Section III, Division 1, Class 3 Construction 6/30/83 N-154 (1791)
Projection Resistance Welding of Valve Seats,Section III, Division 1, Class 1, 2and 3 Valves 1/14/80 N-156 (1793)
Structural Steel Rolled Shapes,Section III, Division I, Class 2, 3, and MC 2/14/86 N-157 (1794)
Use of Seamless Al-Br, Alloy CDA 614 Pipe,Section III, Division 1, Class 3 1/7/83 N-158 (1795)
Examination of Weld Repairs in Forgings,Section III, Division 1, Class 1, 2, 3, MC and CS 7/1/78 N-159 (1796)
Body Neck Thickness Determination for Valves with Inlet Connections 4-Inch Nominal Pipe Size and Smaller,Section III, Division 1, Class 1, 2, and 3 7/1/78 N-174 (1812)
Size of Fillet Welds for Socket Welding of Piping,Section III, Division 1 1/1/81 N-176-1 (1819-1)
Use of Type XM-19 for Construction,Section III, Division 1, Class 1, 2, and 3 8/25/83
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 19 N-177 (1820)
Alternative Ultrasonic Examination Technique,Section III, Division 1 1/1/84 N-178 Use of ASTM B271, CDA 954, Alloy 9C for Class 3 Construction,Section III, Division 1 1/1/80 N-179 Openings in Valves for Section III, Division 1, Class 1, 2 and 3 Construction 7/11/80 N-180 Examination of Springs for Class 1 Component Standards Supports,Section III, Division 1 7/1/78 N-181 Steel Castings Refined by the Argon Decarburization Process,Section III, Division 1, Construction 7/11/80 N-182 Alternate Rules for Procedure Qualification Base Material Orientation,Section III, Division 1, Class 2 and 3 Construction 7/1/81 N-183 Use of Modified SA-182 Grade F22 for Section III, Division 1, Class 1, 2 and 3 Construction 1/1/80 N-184 Roll Threading of SA-453 Bolting for Section III, Division 1, Class 1, 2, 3 or CS Construction 7/1/79 N-188-1 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 8/14/96 N-189 Primary Membrane Plus Primary Bending Stress Intensity Limits for Other Than Solid Rectangular Sections for Section III, Division 1, Class MC Construction 7/1/79 N-190 Use of SA-455 for Class 3 Components,Section III, Division 1 7/1/78 N-193 Use of SB-61 and SB-62 Bronze for Section III, Division 1, Class 3 Flange and Socket Weld End Valves 11/21/80 N-196-1 Exemption from the Shakedown Requirements When Plastic Analysis Is Performed for Section III, Division 1, Class 1 and CS Construction 7/1/92 N-204 Use of Modified SA-508, Class 3, and SA-541, Class 3 for Section III, Division 1, Class 1, 2, and 3 Components 1/1/81 N-206 Use of ASTM B151-75 Copper-Nickel Alloy 706 Rod and Bar for Section III, Division 1, Class 3 Construction 6/30/83 N-207-1 Use of Modified SA-479 Type XM-19 for Section III, Division 1, Class 1, 2, 3, or CS Construction 1/21/85 N-212 (1693)
Welding Procedure Qualification of Dissimilar Metal Welds When Buttering with Alloy Weld Metal and Heat Treatment May Be Involved,Section III, Division 1, and Section IX.
1/1/81
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 20 N-214-2 Use of SA-351 Grade CN7M, for Valves,Section III, Division 1 12/31/83 N-215 Integrally Finned Titanium Tubes,Section III, Division 1, Class 3 Construction 5/15/81 N-217-1 Postweld Heat Treatment of Weld Deposit Cladding on Classes 1, 2, 3, MC, and CS Items,Section III, Division 1 2/23/87 N-220 Code Effective Date for Component Supports,Section III, Division 1 7/13/81 N-223 Requirements for Stainless Steel Precipitation Hardening,Section III, Division 1, Class MC 11/20/81 N-224-1 Use of ASTM A500 Grade B and ASTM A501 Structural Tubing for Welded Attachments for Section III, Class 2, 3, and MC 4/5/90 N-225 Certification and Identification of Material for Component Supports,Section III, Division 1 1/1/81 N-226 Temporary Attachment of Thermocouples,Section III, Division 1, Class 1, 2 and 3 Component Supports 1/1/80 N-227 Examination of Repair Welds,Section III, Class 2 and 3 Tanks 7/9/82 N-228 Alternate Rules for Sequence of Completion of Code Data Report Forms and Stamping for Section III, Class 1, 2, 3 and MC Construction 3/19/82 N-229 Alternate Rules for Fabrication Welding SB-148 Alloy CDA 954 for Section III, Division 1, Class 3 Construction 1/21/88 N-231 Alternate Methods for Leak Detection in the Attachment Welds of Leak Chase Channels,Section III, Division 2, Class CC 7/1/92 N-233 Alternate Rules for PWHT of P-No. 6, Group 4 Material for Section III, Division 1, Class 3 Construction 9/17/87 N-237-2 Hydrostatic Testing of Internal Piping,Section III, Division 1, Classes 2 and 3 7/1/88 N-240 Hydrostatic Testing of Open Ended Piping,Section III, Division 1 7/1/97 N-241 Hydrostatic Testing of Piping,Section III, Division 1 7/1/97 N-245 Use of ASTM B61-76 and B62-76 Copper Alloy Castings for Section III, Division 1, Class 3 Construction 7/17/85
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 21 N-246-2 SB-169 Alloy C61400,Section III, Division 1, Class 3 Construction 7/27/95 N-247 Certified Design Report Summary for Component Standard Supports,Section III, Division 1, Class 1, 2, 3 and MC 4/30/93 N-248 Alternative Reference Radiographs,Section III, Division 1, Classes 1, 2, 3, MC, and CS Construction 7/1/80 N-259 Ni-Cu-Al Bolting Material SB 164 Modified,Section III, Division 1, Class 3 1/1/84 N-261 Weld Procedure Qualification for Materials with Impact Requirements for Section III, Division 1, Class 3 Construction 12/13/82 N-262 Electric Resistance Spot Welding for Structural Use in Component Supports,Section III, Division 1 7/27/91 N-265-1 Modified SA-487 Castings,Section III, Division 1, Class 1 8/14/97 N-267 Double-Wall Radiography,Section III, Division 1, Class 1 and 2 7/1/81 N-271 Simplified Method for Analyzing Flat Face Flanges with Metal to Metal Contact Outside the Bolt Circle for Section III, Class 2, 3, and MC Construction 2/14/86 N-272 Compiling Data Report Forms,Section III, Division 1 1/1/82 N-276 Welding of SA-358 Pipe,Section III, Division 1 2/14/86 N-277 Use of Type XM-19 Austenitic Stainless Steel for Section III, Division 1, Class MC Construction 9/17/80 N-280 Alternate Rules for Examination of Welds in Section III, Class 3 Storage Tanks 7/1/81 N-281 Welding Operator Performance Qualification,Section III, Division 1 7/1/81 N-282 Nameplates for Valves,Section III, Division 1, Class 1, 2, and 3 Construction 7/30/89 N-294 SB-148 Alloys 952 and 954, and SB-62 Alloy 836 Fittings,Section III, Division 1, Class 2 7/27/95 N-295 NCA-1140, Materials,Section III, Division 1 6/30/82 N-296 Welding Material,Section III, Division 1 Construction 12/1/83 N-298 Examination of Component Supports,Section III, Division 1, Class 1, 2, 3, and MC 12/1/83
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 22 N-299-1 Use of Nickel-Chromium-Molybdenum-Columbium Alloy 625 Forgings,Section III, Division 1, Class 2 and Class 3 Components 2/23/87 N-300 Pressure-Temperature Ratings, Hydrostatic Tests, and Minimum Wall Thickness of Valves,Section III, Division 1, Class 1 12/1/83 N-302 Tack Welding,Section III, Division 1, Construction 11/28/83 N-309-1 Identification of Materials for Component Supports,Section III, Division 1 7/1/95 N-313 Alternative Rules for Half-Coupling Branch Connections,Section III, Division 1, Class 2 7/1/96 N-316 Alternative Rules for Fillet Weld Dimensions for Socket Welding Fittings,Section III, Division 1, Class 1, 2, and 3 8/14/93 N-317 ASTM A276 Bar,Section III, Division 7/1/82 N-320 Alternate PWHT for SA-487, Grade CA6NM,Section III, Division 1 12/31/83 N-321-1 Use of Modified SA-249, Grade TP 304,Section III, Division 1, Class 1 12/5/88 N-324 Qualification of Authorized Nuclear Inspector Supervisor (Concrete) and Authorized Nuclear Inspector (Concrete),
Section III, Division 2, Classes CB and CC 7/27/95 N-328 Thermit Brazing or Welding of Nonstructural Attachments,Section III, Division 1 9/17/87 N-336 Examination of Welds Inaccessible During Pressure Test,Section III, Division 1, Class MC 6/30/83 N-337-1 Use of ASTM B 525-70 Grade II, Type II, Sintered Austenitic Stainless Steel for Classes 2, 3, and MC Component Standard Supports,Section III, Division 1 3/14/94 N-339 Examination of Ends of Fillet Welds,Section III, Division 1, Classes 1, 2, and MC 9/17/84 N-341 Certification of Level III NDE Examiner,Section III, Division 1 and 2 7/1/88 N-342 Use of SA-249 and SA-312 Type 317 Stainless Steel,Section III, Division 1, Classes 1, 2, and 3 4/2/85 N-346 Explosive Welding,Section III, Division 1 6/30/86
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 23 N-347 Continuous Electric Resistance Seam Welding of P-No. 8 Materials for Component Supports,Section III, Division 1
12/13/85 N-349 Pressure Testing Piping Systems,Section III, Division 1, Classes 2 and 3 12/31/85 N-352-1 Use of SA-638 Grade 660 Forgings and Bars Below 700F Without Stress Rupture Tests,Section III, Division 1 6/30/86 N-353 Marking of SA-354 Grade BD Bolting,Section III, Division 1 9/5/88 N-354-1 Subcontracted Service,Section III, Division 2 8/14/94 N-355 Calibration Block for Angle Beam Ultrasonic Examination of Large Fittings in Accordance with Appendix III-3410 8/9/96 N-357 Certification of Material for Component Supports,Section III, Division 1, Subsection NF 7/1/88 N-359 Weld Connection for Coaxial Cylinders,Section III, Division 1, Class 1 12/31/84 N-362-2 Pressure Testing of Containment Items,Section III, Division 1, Classes 1, 2, and MC 7/1/88 N-367 SA-372 Type V, Grade 1, Class B,Section III, Division 1 2/19/89 N-368 Pressure Testing of Pump Discharge Piping,Section III, Division 1, Classes 2 and 3 7/1/95 N-370-2 Modified SA-705 Type XM-13 Forgings,Section III, Division 1 8/14/97 N-371-1 12Cr-1W-1Mo-1/4V Martensitic Stainless Steel Valve Internals,Section III, Division 1 7/18/88 N-372 SB-163 Ni-Fe-Cr-Mo-Cu Alloy 825 (UNS N08825) Tubing,Section III, Division 1 12/31/83 N-376 Pressure Testing of Embedded Class 2 and 3 Piping,Section III, Division 1 7/30/86 N-377 Effective Throat Thickness of Partial Penetration Groove Welds,Section III, Division 1, Classes 1, 2, and 3 12/31/83 N-378 Examination of Piping Support Material,Section III, Division 1, Class 1 10/28/86 N-379-1 Bimetallic Tubing,Section III, Division 1, Class 1 7/18/91
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 24 N-384-1 Use of Prepackaged General Purpose Cement Grouts, Epoxy Grouts, and Epoxy Bonding,Section III, Division 2, Class CC 7/27/91 N-388 Component Support Bolting,Section III, Division 1, Classes 2, 3, and MC 2/23/87 N-393 Repair Welding Structural Steel Bolted Shapes and Plates for Component Supports,Section III, Division 1 7/27/95 N-403 Reassembly of Subsection NF Component and Piping Supports,Section III, Division 1 7/1/95 N-410 Certified Relieving Capacities of Pressure Relief Valves Having Set Pressure of 3 psig up to but Not including 15 psig Installed for Overpressure Protection of Compressible Fluid Systems,Section III, Division 1, Classes 2 and 3 3/14/00 N-412 Alternative Rules for Witnessing the Piping System Pressure Tests of Classes 1, 2, and 3 Piping Systems,Section III, Division 1 4/15/91 N-413 Minimum Size of Fillet Welds for Subsection NF Linear Type Supports,Section III, Division 1 2/14/88 N-414 Tack Welds for Class 1, 2, 3 and MC Components and Piping Supports,Section III, Division 1 2/20/92 N-418-1 Use of Seamless Ni-Fe-Cr-Mo-Cu Low Carbon (UNS N08028 and UNS N08904) Tubing,Section III, Division 1, Classes 2 and 3 7/27/95 N-420 Linear Energy Absorbing Supports for Subsection NF, Classes 1, 2, and 3 Construction 1/1/99 N-421 Brazing Using a Radiant Energy Source,Section III, Division 1 6/30/86 N-430 Alternative Requirements for Welding Workmanship and Visual Acceptance Criteria for Class 1, 2, 3, and MC Linear-Type and Standard Supports 7/1/93 N-433 Non-Threaded Fasteners for Section III, Division 1, Class 1, 2, and 3 Components and Piping Supports 12/16/95 N-438-4 UNS N08367 Material,Section III, Division 1, Class 2 and 3 Construction 7/1/98 N-442 1977 Addendum to ANSI/ASME PTC 25.3-1976, Safety and Safety Relief Valves, Class 1, 2, 3, and MC,Section III, Division 1 3/8/92
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 25 N-443-2 High Yield Strength Cr-Mo Steel, Class 1 Components,Section III, Division 1 1/1/01 N-451 Alternative Rules for Analysis of Piping Under Seismic Loading, Class 1,Section III, Division 1 8/14/96 N-459 SA-508 Basic Oxygen-Ladle Furnace Process for Code Construction,Section III, Division 1 3/14/94 N-462 Alternative Rules for Analysis of Piping Products Under Seismic Loading, Class 2 and 3 Piping Systems,Section III, Division 1 5/24/96 N-466-1 Modified 9Cr-1Mo Material,Section III, Division 1, Classes 1, 2, and 3 8/14/97 N-468 Alternative Method of Earthquake Description for Class 2 and 3 Piping of Low Seismicity Sites,Section III, Division 1 11/92 N-470 Class MC Material Requirements [NE-2121(c)],Section III, Division 1 3/8/92 N-474-2 Design Stress Intensities and Yield Strength Values for UNS N06690 With a Minimum Specified Yield Strength of 35 ksi, Class 1 Components,Section III, Division 1 1/1/00 N-475 Materials in Inventory,Section III, Division 1 12/11/92 N-476 Class 1, 2, 3, and MC Linear Component Supports - Design Criteria for Single Angle Members,Section III, Division 1, Subsection NF 7/1/96 N-482 Direct Quenched Stainless Bar, ASTM A 479-88b,Section III, Division 1 3/5/93 N-484-1 Real Time Radioscopic Examination of Welds,Section III, Division 1 12/16/94 N-492-1 Grade 9 Titanium Alloy Tubing,Section III, Division 1, Class 1, 2, and 3 1/1/00 N-497-1 Use of Fe-Ni-Cr-Mo-N (C-N-3MN) Cast Materials,Section III, Division 1, Class 2 and 3 Construction 1/1/99 N-501 Alternative Rules for NCA-3800, 1990 Addenda,Section III, Division 1 12/31/93 N-502 SA-268, Grade 26-3-3 (UNS S44660),Section III, Classes 2 and 3 1/1/00 N-507 Identification of Welders,Section III, Division 2 7/27/95
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 26 N-540 Guidance on Implementation of NCA-3800 Revisions in 1994 Addenda,Section III, Division 1 6/30/98 N-549 Stamping and Flow Certification of Rupture Disk Devices, Classes 2 and 3,Section III, Division 1 3/19/99 N-551 Alternative Methods of Analysis, NC/ND-3673.1, Class 2 and 3 Applications,Section III, Division 1 8/14/97 N-559 SA-203, Grade E (Plate) and SA-350, Grade LF3 (Forging),
3.5% Ni Nominal Composition Used in Class 1 Construction,Section III, Division 1 5/24/99 1141-7 Foreign Produced Steel 7/23/76 1434-1 Postweld Heat Treatment of SA-487 Class 8N Steel Castings,Section III 1/1/78 1461-1 Electron Beam Welding,Section I, III, and VIII, Division 1 and 2
2/16/77 1470-2 External Pressure Charts for High-Strength Carbon Steels and for Low-Alloy Steels,Section VIII, Division 1 and 2, and Section III 11/4/74 1471-1 Vacuum Electron Beam Welding of Tube Sheet Joints,Section III 1/1/78 1475-1 Ferritic-Austenitic Stainless Steel Seamless Tubes for Section III, Class 2 and 3 Construction 7/1/75 1477-1 Use of 1970 Addenda of ANSI B31.7,Section III 1/1/78 1494-1 Weld Procedure Qualification Test,Section III 1/1/78 1506 Stress Intensification Factors,Section III, Class 2 and 3 Piping 1/1/78 1515 Ultrasonic Examination of Ring Forgings for Shell Sections,Section III, Class 1 Vessels 7/1/77 1529 Materials for Instrument Line Fittings,Section III 7/1/73 1531 Electrical Penetrations, Special Alloys for Electrical Penetration Seals,Section III 3/21/77 1532 Section III, Class 3 Components Made of 8 Percent and 9 Percent Nickel Steel 1/1/78 1533 Pressure Temperature Ratings of SA-351 Grades CF8A, CF3, and CF3M,Section III 7/1/75 1535-2 Hydrostatic Testing of Section III, Class 1 Valves 3/21/77
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 27 1536 Closing Seam for Electrical Penetrations for Section III, Class 2, 3, and MC 7/1/77 1553-1 Upset Heading and Roll Threading of SA-453 for Bolting in Section III 1/1/76 1555-1 Certification of Safety Relief Valves,Section III, Division 1 1/1/78 1567 Testing Lots of Carbon and Low Alloy Steel Covered Electrodes,Section III 1/1/78 1568 Testing Lots of Flux Cored and Fabricated Carbon and Low Alloy Steel Welded Electrodes,Section III 1/1/78 1573 Vacuum Relief Valves,Section III 1/1/78 1574 Hydrostatic Test Pressure for Safety Relief Valves,Section III 12/31/74 1580-1 Buttwelded Alignment Tolerance and Acceptable Slopes for Concentric Centerlines for Section III, Class 1, 2, and 3 Construction 1/1/78 1581 Power-Operated Pressure Relief Valves,Section III 3/1/79 1583 Use of 80-40 Carbon Steel Castings,Section III 3/21/77 1587 SA-508 Class 3 Forgings with 0.4/1.0 Ni for Section III and VIII, Division 2 Construction 12/31/75 1590 Chemical Analysis Variations,Section III Construction 3/21/77 1601 Limits of Reinforcement for Two-Thirds Area,Section III, Class 1
7/1/74 1602-1 Use of SB-42 Alloy 122, SB-111 Alloys 122, 715 and 706 and SB-466 Alloys 706 and 715,Section III, Class 2 and 3 Components 12/31/74 1603 Toughness Tests When Cross-Section Limits Orientation and Location of Specimens 7//1/74 1605 Cr-Ni-Mo-V Bolting Material for Section III, Class 1 Components 3/17/80 1608-1 Use of ASME SB-265, SB-337, SB-338, and SB-381, Grades 1, 2, 3, and 7 Unalloyed Titanium and ASTM B-363 Titanium Welding Fittings,Section III, Class 2 and 3 Components 3/21/77 1613 Use of SA-372 Class IV Forgings,Section III Construction 1/1/78
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 28 1614 Hydrostatic Testing of Piping Prior To or Following the Installation of Spray Nozzles for Section III, Classes 1, 2, and 3 Piping Systems 1/1/79 1615 Use of A587-73,Section III, Class 3 Construction 1/1/78 1616 Ultrasonic Examination of Seamless Austenitic Steel Pipe,Section III, Class 1 Construction 7/1/75 1622 PWHT of Repair Welds in Carbon Steel Castings,Section III, Class 1, 2, and 3 1/1/76 1623 Design by Analysis for Section III, Class 1 Sleeve-Coupled and Other Patented Piping Joints 3/1/79 1625 Repair of Section III Class 2 and 3 Tanks 12/31/74 1633 Brazing of Seats to Class 1, 2, and 3 Valve Body or Bonnets,Section III 1/1/78 1637 Effective Date for Compliance with NA-3700 of Section III 1/1/75 1645 Use of DeLong Diagram for Calculating the Delta Ferrite Content of Welds in Section III, Class 1, 2, and CS Construction 1/1/76 1648 SA-537 Plates for Section III, Class 1, 2, 3, and MC Components 7/1/76 1649 Modified SA-453-GR 660 for Class 1, 2, 3, and CS Construction 1/1/76 1650 Use of SA-414 Grade C for Class 2 and 3 Components,Section III, Division 1 12/31/74 1651 Interim Requirements for Certification of Component Supports,Section III, Subsection NF 3/1/79 1657 Stress Criteria for Class 2 and 3 Atmospheric and Low Pressure (0-15 psig) Steel Storage Tanks 7/1/77 1659 Interconnection of Two Piping Systems for Section III, Class 1, 2, and 3 Construction 7/1/77 1661 Postweld Heat Treatment P-No.1 Materials for Section III, Class 1 Vessels 1/1/78 1662 Shop Assembly of Components, Appurtenances and Piping Subassemblies for Section III, Class 1, 2, 3, and MC Construction 1/1/78
CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 29 1664 Use of Cr-Ni-Fe-Mo-Cu-Cb Stabilized Alloy Cb-3 for Section III Class 2 and 3 Construction 3/21/77 1666 Use of SB-12, Alloy 122 for Class 2 and 3 Construction 7/1/75 1682-1 Alternate Rules for Material Manufacturers and Suppliers,Section III, Subarticle NA-3700 21/31/75 1672 Nuclear Valves for Section III, Division 1, Class 1, 2, 3 Construction 3/21/77 1675 Tubesheet to Shell or Formed Head Weld Joints,Section III, Class 1 Vessels 7/1/76 1676 Clarification of Stress Intensities in Curved Pipe or Welded Elbows,Section III 7/1/76 1678 Butterfly Valves of Circular Cross Section Larger than 24 in.
NPS for Section III, Class 2 and 3 Construction 1/1/80 1683-1 Bolt Holes for Section III, Class 1, 2, 3 and MC Component Supports 7/1/76 1684 A637 Grade 718 for Bolting Class 1 and 2 Construction 1/1/76 1685 Furnace Brazing Section III, Class 1, 2, 3 and MC Construction 1/1/78 1686 Furnace Brazing,Section III, Subsection NF, Component Supports 1/1/78 1690 Stock Materials for Section III Construction,Section III, Division 1
1/1/77 1691 Ultrasonic Examination in Lieu of Radiography of Repair Welds for Vessels,Section III, Class 1 1/1/78 1703 Brazing of Copper Alloys,Section III, Class 2 1/1/78 1706 Data Report Forms for Component Supports,Section III, Class 1, 2 and 3 12/31/75 1713 Small Material Items,Section III, Division 1, Class 1, 2, 3, CS and MC 12/31/75 1718 Design of Structural Connections for Linear Type Component Supports,Section III, Division 1, Class 1, 2 and 3 and MC 7/1/76 1719 Single-Welded, Full-Penetration Sidewall Butt Joints in Atmospheric Storage Tanks,Section III, Division 1, Class 2 7/1/76
Table 3 - Annulled Unconditionally Approved Section III Code Cases CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 30 1728 Steel Structural Shapes and Small Material Products for Components Supports,Section II, Division 1 Construction 7/1/77 1740 Weld Metal Test,Section III, Class 1, 2, 3, MC and CS 7/1/76 1741-1 Interim Rules for the Required Number of Impact Tests for Rolled Shapes,Section III, Division 1, Subsection NF, Components Supports 1/1/78 1742 Use of SB-75 Annealed Copper Alloy 122,Section III, Division 1, Class 2 Construction 7/1/76 1743 Use of SB-98 Cu-SiB Rod CDA651 Section III, Division 1, Class 2 Components 7/1/76 1760 Maximum Dimensions for Isolated Pores in Welds-Class 1 Components,Section III, Division 1 7/1/77 1765 Machining After Hydrostatic Testing Class 2 and 3 Construction,Section III, Division 1 7/1/77 1766 Testing Requirements for Welding Materials, Class 1, 2, 3, MC and CS Construction,Section III, Division 1 7/177 1767 Examination of Tubular Products Without Filler Metal-Class 1 Construction,Section III, Division 1 1/1/77 1768 Permanent Attachments to Containment Vessels-Class MC,Section III, Division 1 1/1/78 1769-1 Qualification of NDE Level III Personnel,Section III, Division 1 10/1/77 1773 Use of Other Product Forms of Materials for Valves,Section III, Division 1 7/1/77 1775 Data Report Forms for Core Support Structures, Class CS,Section III, Division 1 8/13/79 1777 Use of SA-106, Grade C in Class MC Construction,Section III, Division 1 7/1/77 1787 Depth of Weld Repairs for Forgings,Section III, Division 1, Class 1, 2, 3, MC and CS Construction 1/1/78 1798 Use of ASTM A352-75, Grades LCA and LCC,Section III, Division 1, Class 1, 2, and 3 1/1/78 1808 F-Number Classification of Low Alloy and Carbon Steel Bare Rod Electrodes, Sections I, II, III, IV, V, VIII, and IX.
1/1/78
Table 4 - Annulled Conditionally Acceptable Section III Code Cases CODE CASE NUMBER TABLE 3 ANNULLED UNCONDITIONALLY APPROVED CODE CASES ANNULMEN T DATE 31 1810 Testing Lots of Carbon Steel Solid, Bare Welding Electrode or Wire,Section III, Division 1, Class 1, 2, 3, MC, and CS 3/3/80 1819 Use of Type XM-19 for Construction,Section III, Division 1, Class 1, 2, 3 1/1/78
- 4.
ANNULLED CONDITIONALLY ACCEPTABLE SECTION III CODE CASES The annulled Code Cases listed in Table 4 below were conditionally approved by the NRC. The ASME issuesSection III Code Cases quarterly in supplements to a specific edition; i.e., a new edition of Section III is published every three years, and supplements are published quarterly. Hence, there are 12 supplements to each edition.
TABLE 4 - ANNULLED CONDITIONALLY ACCEPTABLE SECTION III CODE CASES CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION N-11-5 (1414-5)
High Yield Strength Cr-Mo Steel for Section III, Division 1, Class 1 Vessels 8/29/80 The information required to be developed by Note 1 in the Code Case should be provided in each referencing Safety Analysis Report.
N-31-1 Elastomer Diaphragm Valves,Section III, Division 1, Classes 2 and 3 7/1/93 Each applicant who applies the Code Case should indicate in the referencing Safety Analysis Report that the service life of the elastomer diaphragm should not exceed the manufacturers recommended service life. This recommended service life should not exceed 1/3 of the minimum cycle life as established by the requirements of paragraph 3 of the Code Case. In addition, the service life of the elastomer diaphragm should not exceed 5 years, and the combined service and storage life of the elastomer diaphragm should not exceed 10 years.
N-32-4 Hydrostatic Testing of Embedded Class 2 and Class 3 Piping for Section III, Division 1 Construction 3/16/84
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 32 The acceptance of Code Case N-32-4 was based on the following clarification and interpretation. Code Case N 4 does not replace paragraph NC/ND-6129, Provisions for Embedded or Inaccessible Welded Joints in Piping, of the Code. The intent of the Code Case is to (1) provide additional testing above Code requirements and (2) permit liquid penetrant or magnetic particle testing in place of radiographic testing for Class 3 piping with 3/8" nominal wall thickness or less.
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 33 N-32-4 (contd)
Hydrostatic Testing of Embedded Class 2 and Class 3 Piping for Section III, Division 1 Construction 3/16/84 Paragraph (1) contains an additional requirement to the Code. It was, therefore, acceptable but unnecessary to include in the Code Case.
Paragraph (2) is a variation in the volumetric examination technique and was acceptable as written. Paragraph (3) contains an additional requirement and is not a relaxation of the Code. It was, therefore, acceptable but unnecessary to include in the Code Case.
N-92 (1698)
Waiver of Ultrasonic Transfer Method,Section III, V, and VIII, Division 1 7/13/81 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 equivalent 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.
N-100 (1711)
Pressure Relief Valve Design Rules,Section III, Division 1, Class 1, 2 and 3 1/1/83 The following information should be provided in the Safety Analysis Report:
(1) If stress limits are used in excess of those specified for the upset operating condition, it should be demonstrated how the pressure relief function is ensured. Refer to paragraph 3.1,Section I, of the Case for Class and paragraph 3.2,Section II, of the Case for Class 2 and 3 pressure relief valves.
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 34 N-100 (1711)
(contd)
Pressure Relief Valve Design Rules,Section III, Division 1, Class 1, 2 and 3 1/1/83 (2) If Case 1660 is to be used in conjunction with the Case, it should be stated that the stress limits of Case 1660 supersede those of paragraph 3.2(b),Section I, of Case 1711. Functional assurance of (1) above is required in all situations.
N-106-2 (1720-2)
Weld End Preparation for Section III, Division 1 Construction 8/14/93 The acceptance of weld end preparations other than those shown in Figures 1, 2, and 3 of the Code Case should be evaluated on a case-by-case basis.
N-110 (1727)
Alternate Test Fluids,Section III, Division 1 1/1/79 The applicant should provide justification in the referencing Safety Analysis Report for the fluid selected for use in the pressure test. The information provided should demonstrate that the fluid selected will not have deleterious effects on the material of the pressure boundary and that the fluid may be safely used at the specified temperature and pressure of the test. When the fluid selected for use is the operating fluid, additional information is not required.
N-116 (1734)
Weld Design for Use for Section III, Division 1, Class 1, 2, 3 and MC Construction of Component Supports 1/1/78 If the configuration of Figure 1 of the Code Case is used for Class 1 and MC components supports, full penetration welds should be used. The application of the configuration shown in Figures 2 and 3 should be restricted to the welding of cans for spring encapsulation in spring hangers.
In Figure 3, the length of the leg of the fillet weld adjacent to the plate should be equal to the thickness of the exposed edge of the plate; also, the leg of the fillet weld adjacent to the shell should be equal to the thickness of the exposed end of the shell.
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 35 N-146-1 (1780-1)
Hydrostatic Testing and Stamping of Components,Section III, Division 1, Construction 1/1/82 On a generic basis, the application of the Code Case is limited to pumps and valves. Application to other components should be treated on a case-by-case basis.
Each licensing application in which the Code Case is to be used should contain information showing that, as a minimum the closure fixture will impose loads that result in stresses equal to or greater than those induced during the hydrostatic test of a complete pump assembly. A closure fixture for the part being tested that is similar in size and shape to the actual mating part is considered adequate to impose these loads. It is not intended that piping reaction loadings be simulated in the hydrostatic testing.
N-175 (1818)
Welded Joints in Component Standard Supports,Section III, Division 1 7/1/79 That portion of the unwelded housing that is limited to 90
maximum should include a minimum of two sectors that are uniform in length.
N-199 Intervening Elements,Section III, Division 1, Classes 1, 2, 3 and MC Component Construction 1/1/81 The applicants should provide information in the referencing Safety Analysis Report that demonstrates that all intervening elements have been designed in compliance with the requirements of the respective design specification.
N-238 High Temperature Furnace Brazing of Seat Rings in Valve Bodies or Bonnets for Section III, Division 1, Class 1, 2, and 3 Valves 1/1/82 The furnace brazing process procedure qualification should include a verification for nonsensitization as given in ASTM A 262-70, Practices A or E, or ASTM A 708-74 whenever materials subject to sensitization are to be brazed.
Documentation is required that a nonsensitizing brazing procedure was employed for valves produced to this Case.
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 36 N-242-1 Materials Certification,Section III, Division 1, Classes 1, 2, 3, MC, and CS Construction 6/30/84 Applicants should identify in their Safety Analysis Reports the components and supports for which the Code Case is being applied and should specify the respective paragraphs of the Code Case.
N-252 Low Energy Capacitive Discharge Welding Method for Temporary or Permanent Attachments to Components and Supports,Section III, Division 1, and XI 7/1/82 The applicant should indicate in the Safety Analysis Report the application, the material, and the material thickness to which the strain gage or thermocouple will be attached by CD welding.
N-260-2 Weld Repair of SA-182 Type 316 Forgings,Section III, Division 1, Classes 1, 2, 3, and MC 12/5/88 Type 308L welding materials should not be used to repair grade F 316 N forgings because of the difference in strength levels.
N-263 Alternate Thread Forms, Series and Fits for Component Supports,Section III, Division 1 3/17/83 The following information should be provided in the Safety Analysis Report: (1) a description of the application, (2) a need for the use of the Code Case, and (3) a demonstration that support design will withstand maximum conditions of loading with the worst combination of thread tolerance.
N-274 Alternative Rules for Examination of Weld Repairs for Section III, Division 1 Construction 6/30/86 The ultrasonic examination procedures shall be proven by actual demonstration, to the satisfaction of the Authorized Nuclear Inspector, that the procedures are capable of detecting unacceptable cracks according to Section XI requirements.
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 37 N-275 Repair of Welds,Section III, Division 1 12/31/83 Use of the Code Case is applicable only when the removal of an indication requires that the full weld thickness be removed and, in addition, the backside of the weld assembly joint is not accessible for the removal of examination material. If an indication is removed and weld-metal layers still remain, it is not acceptable to gouge through the wall in order to qualify for use of the Code Case. Instead, examination of the cavity is required when such an indication has been removed.
N-279 Use of Torquing as a Locking Device for Section III, Division 1, Class 1, 2, 3, and MC Component Supports 7/13/81 When torquing or other preloading is used as a locking device and the joint is later unloaded or disassembled, the bolting should be replaced unless it can be demonstrated or proved to the Authorized Nuclear Inspector that the original bolting has not been permanently strained.
N-310-1 Certification of Bolting Materials,Section III, Division 1, Class 1, 2, 3, MC and CS 7/1/82 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 Equipment Support Design Specification are present in the actual bolting material.
N-314 Alternate Rules for Thread Engagement,Section III, Division 1 5/11/84 Applicants should identify in their Safety Analysis Report (1) the minimum length of thread engagement and (2) the procedure used to establish thread engagement.
N-348 N-348-1 N-348-2 Use of SA-574 Socket Weld Head Cap Screws,Section III, Division 1 9/7/85 2/20/89 8/14/93 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-350 Postweld Heat Treatment-Thickness of Material,Section III, Division 1 9/5/85
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 38 Applicants wishing to use this Case for other than P-1 materials should demonstrate that the use of this Case will not adversely affect the required material properties.
N-383-1 Weld Repair of SA-182 Austenitic Forgings,Section III, Division 1, Classes 1, 2, and 3 9/5/85 Applicants who apply the provisions of this Case to permit material manufacturers to weld repair austenitic forgings without resolution heat treatment should provide justification to the NRC staff (via the Safety Analysis Report) why this is acceptable for their applications, including their evaluation of the susceptibility for stress corrosion cracking.
N-397 Alternative Rules to the Spectral Broadening Procedures of N-1226.3 for Classes 1, 2, and 3 Piping,Section III, Division 1 2/20/87 The Code Case is acceptable for specific plant applications on a case-by-case basis pending revision of Regulatory Guide 1.122, Development of Floor Design Response Spectra for Seismic Design of Floor-Supported Equipment or Components.
N-398 Reporting of Charpy-V Notch Test Results,Section III, Division 1
2/20/87 The Code Case is not acceptable to steam generator or reactor coolant pump supports. Applicants wishing to use this Code should indicate in the Safety Analysis Report the component supports to which the case is applied for review on a case-by-case basis.
N-404 Annealed Alloy UNS N06625 Over UNS N06600 Bimetallic Tubing,Section III, Division 1, Class 1 12/11/95 The outside layer of the bimetallic tubing should be limited to a minimum of 5 percent and to a maximum of 40 percent of the wall thickness. The tolerance on the outside layer of material should not exceed -0.000 to +0.007 inches of the specified design wall thickness. [Note: condition contained in Revision 31 of this guide.]
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 39 N-411-1 Alternative Damping Values for Response Spectra Analysis of Class 1, 2, and 3 Piping,Section III, Division 1 5/5/00 (1) The Code Case damping should be used completely and consistently, if used at all. (For equipment other than piping, the damping values specified in Regulatory Guide 1.61, Damping Values for Seismic Design of Nuclear Power Plants, are to be used).
(2) The damping values specified may be used only in those analyses in which current seismic spectra and procedures have been employed. Such use is to be limited only to response spectral analyses (similar to that used in the study supporting its acceptance, NUREG/CR-3526).
The acceptance of the use with other types of dynamic analyses (e.g., time-history analyses or independent support motion method) is pending further justification.
(3) When used for reconciliation work or for support optimization of existing designs, the effects of increased motion on existing clearances and on-line mounted equipment should be checked.
(4) This Code Case is not appropriate for analyzing the dynamic response of piping systems using supports designed to dissipate energy by yielding (i.e., the design of which is covered by Code Case N-420).
(5) This Code Case is not applicable to piping in which stress corrosion cracking has occurred unless a case-specific evaluation is made and is reviewed by the NRC staff. [Note: conditions contained in Revision 31 of this guide.]
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 40 N-430 Alternative Requirements for Welding Workmanship and Visual Acceptance Criteria for Class 1, 2, 3 and MC Linear-Type and Standard Supports,Section III, Division 1 7/1/93 (1) The applicant should demonstrate that the applicable supports are not subject to cyclic loading in excess of 20,000 cycles; and (2) The first sentence of 3.0(f)(1) should be replaced with the following: For material 3/8 in. and less nominal thickness, undercut depth of 1/32 in. on one side of the member for the full length of the weld, or 1/32 in. on one side for one-half the length of the weld, and 1/16 in. for one-fourth of the length of the weld on the face of a rectangular tube or one-fourth the length of the weld on the same side of the member is acceptable.
1361-2 Socket Welds,Section III 3/1/79 Code Case 1361-2 was acceptable when used in connection with Section III, paragraph NB-3356, Fillet Welds.
1412-4 Modified High Yield Strength Steel for Section III, Division 1, Class 1 Vessels 1/1/77 The information required to be developed by Note 1 in the Code Case should be provided in each referencing 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.
1423-2 Wrought Type 304 and 316 with Nitrogen Added, Sections I, III, VIII, Division 1 and 2 7/1/77 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.
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 41 1521-1 Use of H-Grades of SA-240, SA-479, SA-336, and SA-358,Section III 1/1/78 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 High Strength Steel SA-508, Class 2 and SA-541, Class 2 Forgings,Section III, Class 1 Components 1/1/78 The information required to be developed by Note 1 in the Code Case should be provided in each referencing Safety Analysis Report.
1569 Design of Piping for Pressure Relief Valve Station,Section III 7/1/79 Code Case 1569 was acceptable subject to compliance with the recommendations contained in Regulatory Guide 1.67, Installation of Over-pressure Protection Devices.
1606-1 Stress Criteria Section III, Classes 2 and 3 Piping Subject to Upset, Emergency, and Faulted Operating Conditions 7/1/77 Code Case 1606-1 was acceptable subject to the interpretation that the stress limit designations of Upset, Emergency, and Faulted do not necessarily imply agreement with specified plant conditions applicable to ASME Code Class 2 and 3 components for fluid systems.
These designations should be established and justified in the design specifications.
1607-1 Stress Criteria for Section III, Classes 2 and 3 Vessels Designed to NC/NC-3300 Excluding the NC-3200 Alternate 7/1/77 Code Case 1607-1 was acceptable subject to the interpretation that the stress limit designations of Upset, Emergency, and Faulted do not necessarily imply agreement with specified plant conditions applicable to ASME Code Class 2 and 3 components for fluid systems.
These designations should be established and justified in the design specifications.
CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE CODE CASES ANNULMEN T DATE TITLE / CONDITION 42 1635-1 Stress Criteria for Section III, Class 2 and 3 Valves Subjected to Upset, Emergency, and Faulted Operating Conditions 7/1/77 Code Case 1635-1 was acceptable subject to the interpretation that the stress limit designations of Upset, Emergency, and Faulted do not necessarily imply agreement with specified plant conditions applicable to ASME Code Class 2 and 3 components for fluid systems.
These designations should be established and justified in the design specifications.
1636-1 Stress Criteria for Section III, Class 2 and 3 Valves Subjected to Upset, Emergency, and Faulted Operating Conditions 7/1/77 Code Case 1636-1 was acceptable subject to the interpretation that the stress limit designations of Upset, Emergency, and Faulted do not necessarily imply agreement with specified plant conditions applicable to ASME Code Class 2 and 3 components for fluid systems.
These designations should be established and justified in the design specifications.
1689-1 Alternate PWHT Time and Temperature for SA-182 Grade F-22, SA-387 Grade 22, Class 2, and SA-335 Grade P-22 Section III, Class 1, 2, 3 and CS 1/1/78 The alternate postweld heat treatment should be prequalified along with the applicable welding procedure in accordance with ASME Section IX.
1783-1 Qualification of Nondestructive Examination Personnel,Section III, Division 1 1/1/79 The first sentence of paragraph (1) should be replaced with the following: The certification of the Level III nondestructive examination personnel for the purpose of this Section of the Code will be the responsibility of the employer of the Level III individual. If the employer is not a Certificate Holder, then the verification of such certificate is the responsibility of the Certificate Holder.
- 5.
CODE CASES SUPERSEDED BY REVISED CODE CASES The Code Cases listed in Table 5 were approved in prior versions of the guide and have since been superseded by revised Code Cases (on or after July 1, 1974). The date in Column 3 indicates the date on which the ASME approved the revision to the Code
43 Case. Note: Code Cases listed without conditions were unconditionally approved for use by the NRC.
TABLE 5 - SECTION III CODE CASES THAT HAVE BEEN SUPERSEDED BY REVISED CODE CASES ON OR AFTER JULY 1, 1974 CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE N-5 (1344-5)
Nickel-Chromium, Age-Hardenable Alloys (Alloy X750),
Section III 12/13/82 N-7 (1358-5)
High Yield Strength Steel,Section III, Division 1, Class 1 Vessels 12/13/82 The information required to be developed by Note 1 in the Code Case should be provided in each referencing Safety Analysis Report.
N-20 (1484-3)
N-20-1 SB-163 Nickel-Chromium-Iron Tubing (Alloy 600 and 690) at Nickel-Iron-Chromium Alloy 800 at a Specified Minimum Yield Strength of 40.0 Ksi,Section III, Division 1, Class 1 9/5/85 12/7/87 N-20-2 N-20-3 SB-163 Nickel-Chromium-Iron Tubing (Alloy 600 and 690) at 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 11/30/88 2/26/99 N-30-1 (1539)
Metal Bellows and Metal Diaphragm Stem Sealed Valves,Section III, Classes 1, 2, and 3 11/21/77 N-31 (1540-2)
Elastomer Diaphragm Valves,Section III, Class 2 and 3 7/18/85 Each applicant who applies the Code Case should indicate in the referencing Safety Analysis Report that the service life of the elastomer diaphragm should not exceed the manufacturers recommended service life. This recommended service life should not exceed 1/3 of the minimum cycle life as established by the requirements of paragraph 3 of the Code Case. In addition, the service life of the elastomer diaphragm should not exceed 5 years, and the combined service and storage life of the elastomer diaphragm should not exceed 10 years.
N-55 (1609-1)
Inertia and Continuous Drive Friction Welding,Section I, III, IV, VIII, Division 1 and 2, and IX 4/5/84 N-60 (1618-2)
N-60-1 Material for Core Support Structures,Section III, Division 1, Subsection NG 5/25/83 9/17/84 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.
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 44 N-60-2 N-60-3 N-60-4 Material for Core Support Structures,Section III, Division 1, Subsection NG 9/5/85 5/13/91 2/15/94 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. For SA-479 material, the maximum yield strength should not exceed 90,000 psi in view of the susceptibility of this material to environmental cracking.
N-62-2 (1621-2)
N-62-3 N-62-4 N-62-5 N-62-6 Internal and External Valve Items,Section III, Division 1, Class 1, 2 and 3 Line Valves 7/18/85 9/5/85 7/24/89 12/11/89 5/11/94 The Code requires that Class 1 and Class 2 valve manufacturers meet the provisions of NCA 4000, Quality Assurance, and, in addition, Class 3 valve manufacturers should also meet the provisions of NCA-4000.
N-71-7 (1644-7)
N-71-8 (1644-8)
Additional Materials for Component Supports,Section III, Division 1, Subsection NF, Class 1, 2, 3 and MC Component Supports 5/15/78 1/7/80 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 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 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.
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 45 N-71-9 (1644-9)
Additional Materials for Component Supports Fabricated by Welding,Section III, Division 1, Subsection NF, Class 1, 2, 3, and MC Component Supports 5/11/81 In the last sentence of paragraph 5.3, reference should be made to paragraph 4.5.2.2, Alternate Atmosphere Exposure Time Periods Established by Test, of the AWS D.1.1 Code for the evidence presented to and accepted by the Authorized Inspector concerning exposure of electrodes for longer periods of time.
N-71-10 N-71-11 Additional Materials for Component Supports Fabricated by Welding,Section III, Division 1, Subsection NF, Class 1, 2, 3, and MC Component Supports 6/17/82 2/14/83 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 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 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 Atmosphere Exposure Time Periods Established by Test, of the AWS D.1.1 Code for the evidence presented to and accepted by the Authorized Inspector concerning exposure of electrodes for longer periods of time.
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 46 N-71-12 Additional Materials for Component Supports Fabricated by Welding,Section III, Division 1, Class 1, 2, 3 and MC 2/20/84 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 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 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 Atmosphere Exposure Time Periods Established by Test, of the AWS D.1.1 Code for the evidence presented to and accepted by the Authorized Inspector concerning exposure of electrodes for longer periods of time. 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 should be at least 1000F (540C) and should not exceed 1150F (620C) for Class 1 and Class 2 material and 1175F (640C) for Class 3 material. The new holding time at temperature for weld thickness (nominal) should 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.
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 47 N-71-13 N-71-14 N-71-15 N-71-16 Additional Materials for Subsection NF, Classes 1, 2, 3 and MC Component Supports Fabricated by Welding,Section III, Division 1 12/5/85 12/16/86 2/12/93 12/31/96 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 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 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 Atmosphere Exposure Time Periods Established by Test, of the AWS D.1.1 Code for the evidence presented to and accepted by the Authorized Inspector concerning exposure of electrodes for longer periods of time. 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 should be performed in accordance with NF-4622 except that for ASTM A-710 Grade A material, it should be at least 1000F (540C) and should not exceed 1150F (620C) for Class 1 and Class 2 material and 1175F (640C) for Class 3 material. The new holding time at temperature for weld thickness (nominal) should 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 of Classes 1, 2, and 3 component supports should be characterized in accordance with Section 5.3.4 of the USNRC Standard Review Plan (NUREG-0800) or on a case-by-case basis. The fracture toughness requirements as listed in this Code Case apply only to piping supports and not to Class 1, Class 2, and Class 3 component supports.
N-77 (1630)
External Pressure Charts for High Yield Strength Carbon Steels and Low Alloy Steels (Yield strength above 38 Ksi to 60 Ksi Inclusive) For Section III, Class 1, 2, 3, and MC; and Section VIII, Division 1 and 2 7/10/78
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 48 N-95-1 (1701-1)
Determination of Capacities of Vacuum Relief Valves,Section III, Division 1 and 2, Class MC 7/9/79 N-102-1 (1714-2)
Postweld Heat Treatmen of P-1 Material,Section III, Class MC 8/28/78 N-119-2 (1739-2)
N-119-3 (1739-3 N-119-4 (1739-4)
N-119-5 Pump Internal Items,Section III, Division 1, Class 1, 2, and 3 8/25/80 12/1/80 7/18/85 N-122 Stress Indices for Structural Attachments, Class 1,Section III, Division 1 7/24/89 N-133 (1761-1)
Use of SB-148 Alloy CA954 for Section III, Division 1, Class 2 or 3 Flanged End Valves 1/14/77 N-133-1 N-133-2 Use of SB-148 Alloys 952 and 954,Section III, Division 1, Class 3 5/19/85 7/18/85 N-154 (1791)
Projection Resistance Welding of Valve Seats,Section III, Division 1, Class 1, 2 and 3 Valves 12/5/85 N-160 (1797)
Finned Tubing for Construction,Section III, Division 1 7/18/85 N-188 Use of Welded Ni-Fe-Cr-Mo-Cu (Alloy 825) and Ni-Cr-Mo-Cb (Alloy 625) Tubing,Section III, Division 1, Class 3 1/1/78 N-192 N-192-1 Use of Flexible Hose for Section III, Division 1, Class 1, 2, and 3 Construction 8/30/79 9/16/81 The applicant should indicate system application, design and operating pressure, and pressure-temperature rating of the flexible hose. Data to demonstrate compliance of the flexible hose iwth NC/ND-3649, particularly NC-ND-3649.4(e), are required to be furnished with the application.
N-196 Exemption from the Shake-down Requirements When Plastic Analysis is Performed for Section III, Division 1, Class 1 Construction 1/8/79 N-207 Use of Modified SA-479 Type XM-19 for Section III, Division 1, Class 1, 2, or 3 Construction 3/19/79 N-214 N-214-1 Use of SA-351, Grade CN7M, for Valves for Section III, Division 1, Construction 9/7/82 5/25/83
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 49 N-224 Use of ASTM A500 Grade B and ASTM A501 Structural Tubing for Welded Attachments for Section III, Class 2 and 3 Construction 5/11/81 N-237 Hydrostatic Testing of Internal Piping,Section III, Division 1 9/7/82 N-237-1 Hydrostatic Testing of Internal Piping,Section III, Division 1, Classes 2 and 3 5/25/83 N-242 Materials Certification,Section III, Division 1, Classes 1, 2, 3, MC, and CS Construction 4/10/80 Applicants should identify the components and supports requiring the use of paragraphs 1.0 through 4.0 of the Code Case in their Safety Analysis Reports.
N-246 Use of SB-169 Alloy CA614,Section III, Division 1, Class 3 9/7/82 N-246-1 SB-169, Alloy C 61400,Section III, Division 1, Class 3 5/25/83 N-249 Additional Materials for Component Supports Fabricated Without Welding,Section III, Division 1, Subsection NF, Class 1, 2, 3, and MC Component Supports 5/11/81 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 Additional Materials for Component Supports Fabricated Without Welding,Section III, Division 1, Subsection NF, Class 1, 2, 3, and MC Component Supports 6/17/82 Paragraph 7 of the Reply should reference the requirements of NF-2600 instead of NF-2800. This is a typographical error in that NF-2800 does not exist.
N-249-2 N-249-3 Additional Materials for Subsection NF Class 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 2/14/83 2/20/84
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 50 N-249-4 N-249-5 Additional Material for Subsection NF, Classes 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 9/17/84 4/8/85 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 supports. The fracture toughness of Classes 1, 2, and 3 component supports should be characterized in accordance with Section 5.3.4 of the USNRC Standard Review Plan (NUREG-0800) or on a case-by-case basis.
N-249-6 N-249-7 N-249-8 N-249-9 N-249-10 N-249-11 N-249-12 Additional Material for Subsection NF, Classes 1, 2, 3, and MC Component Supports Fabricated Without Welding,Section III, Division 1 9/5/85 12/5/85 12/16/86 5/6/89 5/13/91 2/12/93 5/11/94 The fracture toughness requirements apply only to piping supports and not to Classes 1, 2, and 3 component supports.
The fracture toughness of Classes 1, 2, and 3 component supports should be characterized in accordance with Section 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: 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 frequent sustained loads in service.
N-260 Weld Repair of SA-182 Type 316 Forgings,Section III, Division 1, Classes 1, 2, 3, and MC 7/18/85 N-260-1 Weld Repair of SA-182 Type 316 Forgings,Section III, Division 1, Classes 1, 2, 3, and MC 12/5/85 Type 308 L welding materials should not be used to repair grade F 316 N forgings because of the difference in strength levels.
N-265 Modified SA-487 Castings,Section III, Division 1, Class 1 5/19/85 N-284 Metal Containment Shell Buckling Design Methods,Section III, Division 1, Class MC 7/27/92 If axisymmetric techniques are employed in the analysis of vessels with large openings, the applicability of the methodology in these applications should be demonstrated.
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 51 N-299 Use of Nickel-Chromium-Molybdenum-Columbium Alloy 625 Forgings,Section III, Division 1, Class 2 and Class 3 Components 7/18/85 N-304 N-304-1 N-304-2 N-304-3 Use of 20 Cr-25Ni-6Mo (Alloy UNS N08366) Welded Tubes for Section III, Division 1, Classes 2 and 3 Construction 7/12/84 5/19/85 12/5/85 2/23/87 N-309 Identification of Materials for Component Supports,Section III, Division 1 5/11/84 N-318 N-318-1 N-318-2 N-318-3 N-318-4 Procedure for Evaluation of the Design of Rectangular Cross Section Attachments on Class 2 or 3 Piping,Section III, Division 1 2/20/84 7/12/84 9/5/85 12/11/89 4/28/94 Applicants should identify in their Safety Analysis Report: (1) the method of lug attachment, (2) the piping system involved, and (3) the location in the system where the Case is to be applied.
N-319 N-319-1 N-319-2 Alternate Procedure for Evaluation of Stresses in Butt Weld Elbows in Class 1 Piping,Section III, Division 1 7/24/89 8/14/90 1/17/00 N-321 Use of Modified SA-249, Type 304,Section III, Division 1, Class 1 Construction 12/5/85 N-337 Use of ASTM B 525-70 Grade II, Type II, Sintered Austenitic Stainless Steel for Class 2, 3, and MC Component Standard Supports,Section III, Division 1 7/18/85 N-345 Attachment of AMS 5382 Alloy 31 Seat Rings by Friction Welding,Section III, Division 1, Classes 1, 2, and 3 12/13/82 N-352 Use of SA-638 Grade 660 Forgings and Bars Below 700F Without Stress Rupture Tests,Section III, Division 1 7/18/85 N-362 Alternate Rules for Pressure Testing of Containment Items,Section III, Division 1 12/13/82 N-362-1 Pressure Testing of Containment Items,Section III, Division 1, Classes 1, 2, and MC 7/12/84 N-370 N-370-1 Modified SA-705 Grade XM-13 Forgings,Section III, Division 1 7/18/85 12/5/85 N-371 12Cr-1W-1Mo-1/4V Martensitic Stainless Steel Valve Internals,Section III, Division 1 7/18/85 N-379 Bimetallic Tubing Section III, Division 1, Class 1 7/18/85
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 52 N-383 Weld Repair of SA-182 Austenitic Forgings,Section III, Division 1, Classes 1, 2, and 3 7/18/85 Applicants who apply the provisions of the Case to permit material manufacturers to weld repair austenitic forgings without resolution heat treatment should provide justification to the NRC staff (via the Safety Analysis Report) why this is acceptable for their applications, including their evaluation of the susceptibility for stress corrosion cracking.
N-391 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attachments on Class 1 Piping,Section III, Division 1 7/24/89 N-391-1 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attachments on Class 1 Piping,Section III, Division 1 8/24/95 The following typographical errors need to be corrected: 1) In equation (3) the + sign should be changed to an = sign. 2) In equation (4) the first + sign should be changed to an = sign.
N-392 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attachments on Classes 2 and 3 Piping,Section III, Division 1 12/11/89 N-392-1 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attachments on Classes 2 and 3 Piping,Section III, Division 1 12/11/92 Applicants should identify in their Safety Analysis Report: (1) the method of lug attachment, (2) the piping system involved, and (3) the location in the system where the Case is to be applied.
N-392-2 Procedure for Evaluation of the Design of Hollow Circular Cross Section Welded Attachments on Classes 2 and 3 Piping,Section III, Division 1 12/12/94 Applicants should identify in their Safety Analysis Report: (1) the method of lug attachment, (2) the piping system involved, and (3) the location in the system where the Case is to be applied.
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 53 N-411 Alternative Damping Values for Seismic Analysis of Classes 1, 2, and 3 Piping Sections,Section III, Division 1 2/20/86 (1) The damping values specified may be used in analyzing piping response for seismic and other dynamic loads being filtered through building structures provided response mode frequencies are limited to 33 Hz and below. Within this range, the Code Case damping should be used completely and consistently, if used at all. (For equipment other than piping, the damping values specified in Regulatory Guide 1.61, Damping Values for Seismic Design of Nuclear Power Plants, should be used).
(2) The damping values specified may be used only in those analyses in which current seismic spectra and procedures have been employed. Such use should be limited only to response spectral analyses (similar to that used in the study supporting its acceptance-Reference NUREG/CR-3526. The acceptance of the use with other types of dynamic analyses (e.g., time-history analysis) is pending further justification.
(3) When used for reconciliation work or for support optimization of existing designs, the effects of increased motion on existing clearances and on line mounted equipment should be checked. (4) This Code Case is not appropriate for analyzing the dynamic response of piping systems using supports designed to dissipate energy by yielding (i.e., the design of which is covered by Code Case N-420). (5) This Code Case is not applicable to piping in which stress corrosion cracking has occurred unless a case-specific evaluation is made and is reviewed by the NRC staff.
N-418 Use of Seamless Ni-Fe-Cr-Mo-Cu Low Carbon (UNS N08028 and UNS N08904) Tubing,Section III, Division 1, Classes 2 and 3 7/30/86 N-438 N-438-1 N-438-2 Fe-24.5Ni-21Cr-6.5 Mo-0.2N (Alloy UNS N08367) Seamless and Welded Pipe, Tube, Plate, Bar, Fittings, and Forgings, Class 2 and 3 Construction,Section III, Division 1 3/8/89 3/5/90 7/27/92 N-438-3 UNS N08367 Material,Section III, Division 1, Class 2 and 3 Construction 5/24/96 N-439 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 7/10/00 N-440 Use of 20Cr-18Ni-6Mo (Alloy UNS J93254) Castings, Class 2 and 3 Construction,Section III, Division 1 7/10/00 N-441 N-441-1 Use of 20Cr-18Ni-6Mo (Alloy UNS S31254) Fittings, Class 2 and 3 Construction,Section III, Division 1 11/25/92 7/10/00
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 54 N-443 N-443-1 High Yield Strength Cr-Mo Steel, Class 1 Components,Section III, Division 1 3/8/89 11/11/99 N-453 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N08925) Welded Pipe for Class 2 and 3 Construction,Section III, Division 1 11/30/88 N-453-1 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N08925) Seamless and Welded Pipe for Class 2 and 3 Construction,Section III, Division 1 4/30/92 N-453-2 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N08925 and N08926) Seamless and Welded Pipe for Class 2 and 3 Construction,Section III, Division 1 12/12/95 N-454 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N08925) Wrought Fittings for Class 2 and 3 Construction,Section III, Division 1 4/30/92 N-455 Nickel-Chromium-Molybdenum-Copper Stainless Steel (UNS N08925) Forged Flanges and Fittings for Class 2 and 3 Construction,Section III, Division 1 4/30/92 N-466 Modified 9Cr-1Mo Material,Section III, Division 1, Classes 1, 2, and 3 4/30/90 N-469 Martensitic Stainless Steel for Class 1, 2, and 3 Components,Section III, Division 1 6/14/00 N-474 Design Stress Intensities and Yield Strength Values for Alloy 690 With a Minimum Yield Strength of 35 ksi, Class 1 Components,Section III, Division 1 3/5/90 N-474-1 Design Stress Intensities and Yield Strength Values for UNS N06690 With a Minimum Specified Yield Strength of 35 ksi, Class 1 Components,Section III, Division 1 12/9/93 N-484 Real Time Radioscopic Examination of Welds,Section III, Division 1 12/16/91 N-492 Grade 9 Titanium Alloy Tubing,Section III, Division 1, Class 1, 2, and 3 5/11/94 N-497 Use of Fe-Ni-Cr-Mo-N (C-N-3MN) Cast Materials,Section III, Division 1, Class 2 and 3 Construction 12/9/93 N-510 Borated Stainless Steel for Class CS Core Support Structures and Class 1 Components,Section III, Division 1 12/12/94 N-520 Alternative Rules for Renewal of N-type Certificates for Plants Not in Active Construction,Section III, Division 1 10/26/94
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 55 N-564-1 UNS J93380, Alloy CD3MWCuN, Class 2 and 3 Construction,Section III, Division 1 12/31/96 N-580 Use of Alloy 600 With Columbium Added,Section III, Division 1 5/20/98 1332-6 Requirements for Steel Forgings,Section III and VIII, Division 1 1/8/79 1335-9 Requirements for Bolting Materials 8/28/78 1337-9 1337-10 Special Type 403 Modified Forgings or Bars,Section III 4/28/75 5/15/78 1395-3 SA-508, Class 2 Forgings with Modified Manganese Content,Section III or Section VIII, Division 2 1/8/79 1407-2 Time of Examination for Class 1, 2, and 3,Section III Vessels 7/1/74 1414-3 1414-4 High Yield Strength Cr-Mo Steel for Section III, Division 1, Class 1 Vessels 3/1/76 8/9/77 The information required to be developed by Note 1 in the Code Case should be provided in each referencing Safety Analysis Report.
1484-1 SB-163 Nickel-Chromium-Iron Tubing (Alloy 600) at a Specified Minimum Yield Strength of 40.0 Ksi,Section III, Class 1 11/4/74 1484-2 SB-163 Nickel-Chromium-Iron Tubing (Alloy 600 and 690) at a Specified Minimum Yield Strength of 40.0 Ksi,Section III, Class 1 8/13/76 1492 Post Weld Heat Treatment,Section I, III and VIII, Division 1 and 2 3/3/75 1508 Allowable Stresses, Design Intensity and/or Yield Strength Values,Section I, III, and VIII, Divisions 1 and 2 6/30/75 1516-1 Welding of Seats in Valves for Section III Applications 8/11/75 1540-1 Elastomer Diaphragm Valves,Section III, Classes 2 and 3 1/14/77 1541-1 Hydrostatic Testing of Embedded Class 2 and Class 3 Piping for Section III Construction 9/30/76 1541-2 Hydrostatic Testing of Embedded Class 2 and Class 3 Piping for Section III, Division 1 Construction 5/15/78 1552 Design by Analysis of Section III, Class 1 Valves 8/29/77 1553 Upset Heading and Roll Threading of SA-453 for Bolting in Section III 3/3/75 1555 Certification of Safety Relief Valves on Liquids 1/14/77 1557-2 Steel Products Refined by Secondary Remelting 1/8/79
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 56 1606 Stress Criteria for Section III, Class 2 and 3 Piping Subjected to Upset, Emergency, and Faulted Operating Conditions 12/16/74 Code Case 1606 was acceptable subject to the interpretation that the stress limit designations of Upset, Emergency, and Faulted do not necessarily imply agreement with specified plant conditions applicable to ASME Code Class 2 and 3 components for fluid systems. These designations should be established and justified in the design specifications.
1607 Stress Criteria for Section III, Classes 2 and 3 Vessels Subjected to Upset, Emergency, and Faulted Operating Conditions 11/4/74 Code Case 1607 was acceptable subject to the interpretation that the stress limit designations of Upset, Emergency, and Faulted do not necessarily imply agreement with specified plant conditions applicable to ASME Code Class 2 and 3 components for fluid systems. These designations should be established and justified in the design specifications.
1618 Material for Core Support Structures,Section III, Subsection NG 3/3/75 (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 Material for Core Support Structures,Section III, Subsection NG 3/1/76 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.
1626 Normalized and Tempered 1-1/4 Cr Low Alloy Steel Forgings,Section I, Section III, and Section VIII, Division 1 and 2 1/8/79 1634 1634-1 Use of SB-359 for Section III, Class 3 Construction 8/12/74 8/13/76 1644 1644-1 1644-2 1644-3 Additional Materials for Component Supports,Section III, Subsection NF, Class 1, 2, 3, and MC Construction 4/28/75 6/30/75 11/3/75 3/1/76 The maximum measured ultimate tensile strength of the component support material should not exceed 170 Ksi.
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 57 1644-4 1644-5 1644-6 Additional Materials for Component Supports and Alternate Design Requirements for Bolted Joints,Section III, Division 1, Subsection NF, Class 1, 2, 3, and MC Construction 8/13/76 3/3/77 11/21/77 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 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 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.
1682 Alternate Rules for Material Manufacturers and Suppliers,Section III, Subarticle NA-3700 8/11/75 1683 Bolt Holes for Section III, Division 1, Class 1, 2, 3 and MC Component Supports 3/1/76 1689 Alternate PWHT Time and Temperature for SA-182 Grade F22,Section III, Class 1, 2, 3 and CS 9/10/76 The alternate postweld heat treatment should be prequalified along with the applicable welding procedure in accordance with ASME Section IX.
1695 Brazing,Section III, Class 3 11/3/75 1701 Determination of Capacities of Vacuum Relief Valves,Section III, Class MC 3/20/78 1702 Flanged Valves Larger than 24 inches for Section III, Class 1, 2 and 3 Construction 7/11/77 1714 Postweld Heat Treatment of P-1 Material,Section III, Class MC 7/11/77
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 58 1720 Weld End Preparation for Section III, Division Construction 3/1/76 Weld end preparations other than those shown in Figures 1, 2, and 3 of the Code Case are not acceptable on a generic basis. Such alternative end preparations should be treated on a case-by-case basis.
1720-1 Weld End Preparation for Section III, Division Construction 11/20/78 The acceptance of weld end preparations other than those shown in Figures 1, 2, and 3 of the Code Case should be evaluated on a case-by-case basis.
1722 Vacuum, Carbon Deoxidized SA-508 Forgings,Section III, Division 1, and VIII, Division 1 and 2 1/8/79 1741 Interim Rules for the Required Number of Impact Tests for Rolled Shapes,Section III, Division 1, Subsection NF, Component Supports 1/14/77 1755 Alternate Rules for Examination of Welds in Piping, Class 1 and 2 Construction,Section III, Division 1 1/14/77 1759 Material for Internal Pressure Retaining Items for Pressure Relief Valves,Section III, Division 1, Class 1, 2, and 3 5/15/78 Applicants using this Case should also use Code Case 1711 for the design of pressure relief valves.
1769 Qualification of NDE Level III Personnel,Section III, Division 1 2/16/77 1774 Minimum Wall Thickness for Class 2 and 3 Valves,Section III, Division 1 7/11/77
CODE CASE NUMBER TABLE 5, CODE CASES SUPERSEDED BY REVISED CODE CASES REVISIO N
DATE 59 1780 Hydrostatic Testing and Stamping of Pumps for Class 1 Construction,Section III, Division 1 3/10/78 Each licensing application in which the Code Case is to be used should present information that satisfactorily demonstrates that the subassembly tests adequately simulate the pressure loadings. Also, the closure fixture for the test subassembly should adequately simulate the rigidity of adjacent subassemblies and also simulate the interface loadings from adjacent subassemblies that would result from a hydrostatic pressure test of a complete pump assembly. As a minimum, the closure fixture should impose loads that result in stresses equal to or greater than those induced during the hydrostatic test of a complete pump assembly. It is not intended that piping reactor loadings be simulated in the hydrostatic testing.
1783 Qualification of Nondestructive Personnel,Section III, Division 1 1/14/77 The first sentence of paragraph (1) should be replaced with the following: The certification of the Level III nondestructive examination personnel for the purposes of this Section of the Code shall be the responsibility of the employer of the Level III individual. If the employer is not a Certificate Holder, then the verification of such certificate is the responsibility of the Certificate Holder.
1761 Use of SB-148 Alloy CA954 for Section III, Division 1, Class 2 or 3 Flanged End Valves 1/14/77
60 Appendix A SUPPLEMENTS ADDRESSED IN PROPOSED REVISION 32 TO REGULATORY GUIDE 1.84 EDITION SUPPLEMEN T NUMBER BNCSa APPROVAL DATE OF CODE CASES IN SUPPLEMENTb 1992 4
February 12, 1993 1992 5
April 27, 1993 1992 6
August 9, 1993 1992 7
December 9, 1993 1992 8
February 15, 1994 1992 9
May 11, 1994 1992 10 August 5, 1994 1992 11 December 12, 1994 1992 12 March 14, 1995 1995 1
June 9, 1995 1995 2
August 24, 1995 1995 3
December 12, 1995 1995 4
March 19, 1996 1995 5
May 24, 1996 1995 6
August 9, 1996 1995 7
December 31, 1996 1995 8
March 12, 1997 1995 9
May 26, 1997 1995 10 August 14, 1997 1995 11 December 12, 1997 1995 12 March 2, 1998 1998 1
May 20, 1998 1998 2
July 30, 1998 1998 3
February 15, 1999
EDITION SUPPLEMEN T NUMBER BNCSa APPROVAL DATE OF CODE CASES IN SUPPLEMENTb 61 1998 4
February 26, 1999 1998 5
May 7, 1999 1998 6
September 24, 1999 1998 7
November 11, 1999 1998 8
January 17, 2000 1998 9
March 28, 2000 1998 10 October 2, 2000 1998 11 December 8, 2000 a BNCS - ASME Board on Nuclear Codes and Standards b Publication generally is 3 months after BNCS approval.
1 Except for those Code Cases pertaining to high temperature gas-cooled reactors;Section III, Division 2; liquid metal; and submerged spent fuel waste casks.
2 Code Case is not acceptable for use; See Draft Regulatory Guide DG-1112.
62 Appendix B Numerical Listing of Section III Code Cases in Supplement 4, 1992 Edition, through Supplement 11, 1998, Edition1 N-4-11 N-7-1 N-20-3 N-20-4 N-31-1 N-47-30 N-47-31 N-47-32 N-47-33 N-48-2 N-49-4 N-50-1 N-51-2 N-60-5 N-62-6 N-62-7 N-71-16 N-71-17 N-106-2 N-119-6 N-122-2 N-131-1 N-133-3 N-154-1 N-155-2 N-160-1 N-171 N-188-1 N-192-2 N-196-1 N-205 N-208-1 N-208-2 N-213 N-231 N-240 N-241 N-243 N-246-2 N-247 N-249-12 N-249-13 N-262 N-265-1 N-284-12 N-292 N-294 N-304-4 N-309-1 N-313 N-315 N-316 N-318-4 N-318-5 N-319-2 N-319-3 N-324 N-329 N-337-1 N-345-1 N-348-2 N-351 N-354-1 N-368 N-369 N-370-2 N-373-1 N-379-1 N-384-1 N-387 N-391-1 N-391-2 N-392-2 N-392-3 N-393 N-394 N-395 N-403 N-404 N-405-1 N-410 N-411-1 N-418-1 N-420 N-430 N-433 N-438-1 N-438-3 N-438-4 N-439 N-439-1 N-440 N-440-1 N-441-1 N-441-2 N-443-2 N-451 N-452 N-453-3 N-454-1 N-455-1 N-459 N-462 N-464 N-466-1 N-469 N-469-1 N-474-2 N-475 N-476 N-482 N-483-22 N-483-32 N-484-1 N-492-1 N-493 N-497-1 N-500 N-500-1 N-501 N-502 N-505 N-507 N-5102 N-510-12 N-511 N-5192 N-520 N-520-1 N-525 N-5302 N-539 N-540 N-548 N-549 N-550 N-551 N-558 N-559 N-564 N-564-1 N-564-2 N-5652 N-570 N-572 N-579 N-580 N-580-1 N-594 N-5952 N-595-12 N-595-22 N-596 N-607 N-608 N-610 N-611 N-620 N-621 N-625 N-626 N-631 N-632 N-635
63 N-636 N-637 N-642 N-644 N-646
64 DRAFT IMPACT STATEMENT A draft impact statement has been prepared for the publication for public comment for proposed revisions to Regulatory Guides 1.84, Design and Fabrication Code Case Acceptability, ASME Section III (DG-1090), and 1.147, Inservice Inspection Code Case Acceptability, ASME Section XI, Division 1, and one proposed regulatory guide. The proposed Revision 32 of Regulatory Guide 1.84 will combine Regulatory Guides 1.84 and 1.85. The new proposed guide is DG-1089, Operation and Maintenance Code Case Acceptability, ASME OM Code.
ASME Code Cases provide alternatives to existing requirements contained in the ASME BPV and OM Codes, which have already been incorporated by reference into 10 CFR 50.55a. Hence, the inservice examinations and inservice testing provisions incorporated into 10 CFR 50.55a are currently being performed by licensees. Use of these alternatives, therefore, does not result in associated installation or continuing costs.
In addition, since many Code Cases provide more efficient and effective examinations and tests or were developed for the purpose of reducing occupational exposure, the implementation of Code Cases reduces the burden on industry.
A copy of the Draft Impact Statement is available for inspection or copying for a fee in the NRCs Public Document Room at 11555 Rockville Pike, Rockville, MD. The PDRs mailing address is USNRC PDR, Washington, DC 20555; telephone (301)415-4737 or 1-(800)397-4209; fax (301)415-3548; e-mail <PDR@NRC.GOV>. The Draft Impact Statement is also available through the NRCs Electronic Reading Room under accession number ML012690636.