Document: NRC Regulatory Guide
Document ID: a1541707-8144-409c-8842-4ea7d4b8ef4e
Document Type: regulatory_guide
Title: 10/2019 (Rev. 19)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1912/ML19128A244.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.147
CFR Part: 
CFR Title: 

Content:
he Code Case until it updates its Construction Code of Record (an applicant would update its application) or until the licensee’s 120-month ISI/inservice testing (IST) update interval expires, after which the NRC prohibits the continued use of the Code Case unless the agency approves its use under 10 CFR 50.55a(z). If the NRC incorporates a Code Case by reference into 10 CFR 50.55a and if ASME later issues a revised version of the Code Case because experience has shown that the design analysis, construction method, examination method, or testing method is inadequate, the NRC will amend 10 CFR 50.55a and the relevant RG to remove its approval of the superseded Code Case. Applicants and licensees should not begin to implement such superseded Code Cases in advance of the rulemaking. With regard to the use of any Code Case, the user is responsible for ensuring that the provisions of the Code Case do not conflict with licensee commitments or regulatory requirements. RG 1.147, Rev. 19, Page 6 C. REGULATORY POSITION For RG 1.147, Revision 19, the NRC reviewed the Section XI Code Cases listed in Supplement 11 to the 2010 Edition and Supplements 0 through 7 to the 2013 Edition of the ASME BPV Code. Additionally, there are six Code Cases selected from supplements to the 2015 Edition and two Code Cases selected from supplements to the 2017 Edition of the ASME Code. RG 1.147, Revision 19 supersedes the information in Revision 18. Appendix A to this guide lists the supplements reviewed by the NRC, the editions, the supplement numbers, and the dates on which the supplements were approved by the ASME Board on Nuclear Codes and Standards. Appendix B to this guide lists the Section XI Code Cases in the nine supplements and eight selected Code Cases from the 2015 and 2017 Editions of the ASME Code. Finally, Appendix C to this guide lists all current Section XI Code Cases. The following five tables list the Code Cases addressed by this RG: a. Table 1, “Acceptable Section XI Code