Document: NRC Regulatory Guide
Document ID: e1a28538-35cc-4fc2-ab12-2e1d95830205
Document Type: regulatory_guide
Title: Acceptability of ASME Code, Section XI, Division 2, Requirements for RIM Programs for NPPs, for Non-LWRs
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2112/ML21120A185.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.246
CFR Part: 
CFR Title: 

Content:
bilistic Risk Assessment Standard for Advanced Non-Light Water Reactor Nuclear Power Plants.” (Ref. 15). Basis for Regulatory Guidance Position 7 The applicant or licensee should justify why the PRA is adequate in terms of scope, level of detail, and technical adequacy for use with RIM and the development of reliability targets. If a PRA peer review was conducted prior to the application, the staff would examine the documented results. An acceptable peer review is one which is performed according to an established process and by qualified personnel to document the results and to identify strengths and weaknesses of the PRA. The staff may, under certain circumstances, decide to perform an audit to verify the technical adequacy of the PRA and the disposition of any PRA peer review findings. Basis for Regulatory Guidance Position 8 ASME Code, Section XI, Division 2 would permit using alternate examination methods in lieu of the examination requirements specified in the construction code. The NRC does not approve the use of alternate NDE in lieu of NDE requirements in a licensee’s construction code,4 e.g., ASME Code Section III. ASME Code, Section XI, Division 2 is intended to work in conjunction with the construction code to ensure reliability targets are met. When it is determined that a modification to the design is necessary to achieve appropriate reliability targets, the modification is governed by the construction code for the plant. When alternate examination methods are to be substituted for the methods specified in the construction code, that change must be made in accordance with the construction code and may need NRC staff review and approval. Basis for Regulatory Guidance Position 9 ASME Code, Section XI, Division 2 provides appropriate time constraints for completing PSIs for components initially selected for examination in accordance with the RIM program but lacks information related to the timing for completion of preservice examinations that may be