Document: NRC Regulatory Guide
Document ID: a4944d20-ef6e-480b-a45d-14425bedd2e5
Document Type: regulatory_guide
Title: ASME Code Cases Not Approved for Use (Rev. 8)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2219/ML22196A065.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.193
CFR Part: 
CFR Title: 

Content:
luded information from Supplements 0 through 7 to the 2015 Edition, Supplements 0 through 7 to the 2017 Edition and Supplements 0 and 1 to the 2019 Edition of the ASME BPV Code and the 2020 Edition of the OM Code. Background ASME publishes a new edition of the BPV Code every 2 years and periodically publishes a new edition of the OM Code. In 10 CFR 50.55a(a), the NRC references the latest editions and addenda of the BPV Code, Section III and Section XI, and the OM Code that the agency has approved for use by applicants and licensees. ASME also publishes Code Cases for BPV Code, Section III and Section XI, quarterly, and Code Cases for the OM Code periodically. Code Cases provide alternatives (to the ASME Code provisions) developed and approved by ASME. The NRC staff reviewed Code Cases for Sections III and XI listed in Supplements 0 through 7 to the 2015 Edition, Supplements 0 through 7 to the 2017 Edition and Supplements 0 and 1 to the 2019 Edition of the ASME BPV Code. The NRC published RG 1.84, “Design, Fabrication, and Materials Code Case Acceptability, ASME Section III,” Revision 39, and RG 1.147, “Inservice Inspection Code Case Acceptability, ASME Section XI, Division 1,” Revision 20, concurrently with this guide to identify the Code Cases that the NRC has determined to be acceptable alternatives to applicable parts of BPV Code, Sections III and XI. The NRC staff also reviewed the OM Code Cases listed in the 2020 Edition of the OM Code. The NRC published RG 1.192, “Operation and Maintenance Code Case Acceptability, ASME OM Code,” Revision 4, concurrently with this guide to identify the Code Cases that the NRC has determined to be acceptable alternatives to applicable parts of the OM Code. DG-1408, Page 5 C. STAFF REGULATORY GUIDANCE RG 1.193, Revision 8 updates and supersedes the information in Revision 7. Licensees should not implement the Code Cases from BPV Code, Sections III and XI, listed in Supplements 2 through 7 to the 2019 Edition, and