Document: NRC Regulatory Guide
Document ID: 22ccfd5e-c5d8-4615-a02c-32369aa9f533
Document Type: regulatory_guide
Title: Acceptability of Probabilistic Risk Assessment Results for Risk-Informed Activities (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1930/ML19308B636.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.200
CFR Part: 
CFR Title: 

Content:
ch meets regulatory position C.2.2.2.2 of this RG. NEI 17-07, Revision 2, provides guidance on peer review for the acceptability of an NDM and peer review for the implementation of an NDM in a PRA and draws a distinction between these two types of peer reviews for NDMs. The acceptability peer review of an NDM determines whether the NDM is suitable to be used to support a PRA and should be assessed against the NRC-endorsed requirements for NDMs from PWROG- 19027-NP, Revision 1, as discussed above. The peer review team members for the NDM acceptability peer review should possess experience and expertise sufficient to allow for a comprehensive understanding of the NDM. Unlike the peer review for implementation of methods, the acceptability peer review of NDMs involves a detailed examination of supporting information beyond a sampling review. Furthermore, all finding-level F&Os are closed using an NRC-endorsed process before the NDM is used to support an application. A summary report of the NDM acceptability peer review is documented and submitted to the NRC, which details the results of the peer review and provides, among other things, conclusions regarding the acceptability of the NDM. Regardless of whether an acceptability or implementation peer review for an NDM is performed concurrent with or independent of a peer review of a base PRA, the peer review should follow the guidance in NEI 17-07, Revision 2, as endorsed in this RG. 3. Demonstrating the Acceptability of a PRA Used to Support an Application This section of the RG provides guidance to licensees on an approach acceptable to the NRC staff to demonstrate the acceptability of the base PRA used, in total or in part, to support an application. PRA acceptability for a given risk-informed activity is determined in the context of the staff position in this RG, relevant application-specific regulatory guidance, and the related requirements (e.g., license condition) for the application. The application-specific RGs