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:
and the public availability of NDM peer review reports. Section 5.3 of PWROG-19027-NP, Revision 1, provides the potential outcomes of a peer review of an NDM with respect to whether an NDM is able to support a PRA. NRC endorsement of this document is provided in regulatory position C.2.2.4 of this RG. Facts and Observation Independent Assessment The ASME/ANS Level 1/LERF PRA standard requires a peer review of the base PRA against the requirements in that standard. The ASME/ANS Level 1/LERF PRA standard, however, does not require the licensee or applicant to close the F&Os resulting from the peer review of the base PRA prior to using it in applications. However, a licensee may conduct an F&O independent assessment to close F&Os identified by peer review of the base PRA against a national consensus PRA standard (or from a peer review performed prior to the issuance of RG 1.200, Revision 1) have been appropriately resolved. One acceptable F&O independent assessment approach is one that is performed according to the NRC-endorsed process, by qualified personnel, and that sufficiently documents the results of the independent assessment. Moreover, in performing an F&O independent assessment, the scope of the independent assessment is identified. The NRC endorses the F&O independent assessment process provided in NEI 17-07, Revision 2, as an acceptable process for meeting regulatory position C.2.2.3 with the following clarification. Documentation of the resolution of a peer review finding should describe how the deficiency in the finding was addressed such that it can be easily demonstrated that the associated supporting requirement is met. Furthermore, Section 5.1 of PWROG-19027-NP, Revision 1, provides recommended peer review requirements for Section 1-6 of the ASME/ANS Level 1/LERF PRA standard. The staff finds the recommended peer review requirements to be appropriate for the F&O independent assessment process. For a focused-scope peer review, all the applicable SRs