Document: NRC Regulatory Guide
Document ID: 1bd47be4-b79c-4108-b744-3e7d400266e8
Document Type: regulatory_guide
Title: ASME Code Cases Approved for Use Without Conditions (Rev. 0)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2509/ML25091A013.pdf
Revision Date: 2025-09
Chapter: 
Section ID: RG-1.262
CFR Part: 
CFR Title: 

Content:
part, that Class 1, 2, and 3 metal containment (MC), and concrete containment (CC) components and their supports meet the requirements of Section XI, “Rules for Inservice Inspection of Nuclear Power Plant Components,” of the ASME BPV Code (Ref. 4). • 10 CFR 52.79(a)(11) (Ref. 5) requires the final safety analysis report to include a description of the program(s), and their implementation, necessary to ensure that the systems and components meet the requirements of the ASME BPV Code and the ASME OM Code in accordance with 10 CFR 50.55a. Related Guidance • RG 1.84, “Design, Fabrication, and Materials Code Case Acceptability, ASME Section III” (Ref. 6), lists the ASME BPV Code, Section III, code cases that the NRC has approved for use as voluntary alternatives to the mandatory ASME BPV Code provisions incorporated in 10 CFR 50.55a. • RG 1.147, “Inservice Inspection Code Case Acceptability, ASME Section XI, Division 1” (Ref. 7), lists the ASME BPV Code, Section XI, code cases that the NRC has approved for use as voluntary alternatives to the mandatory ASME BPV Code provisions incorporated in 10 CFR 50.55a. • RG 1.192, “Operation and Maintenance Code Case Acceptability, ASME OM Code” (Ref. 8), lists the ASME OM code cases that the NRC has approved for use as voluntary alternatives to the mandatory ASME OM Code provisions incorporated in 10 CFR 50.55a. • RG 1.193, “ASME Code Cases Not Approved for Use” (Ref. 9), lists the ASME BPV Code Section III and Section XI code cases, and the ASME OM code cases, that the NRC has not approved for generic use. Purpose of This Regulatory Guide The NRC incorporates this RG into 10 CFR 50.55a by reference. This RG contains new or revised code cases that the NRC has determined to be acceptable for use without conditions. This RG supplements RGs 1.84, 1.147, and 1.192. Applicants or licensees may voluntarily use code cases approved by the NRC as an alternative to compliance with the ASME BPV and OM Code