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:
7-NP, Revision 1, and the regulatory position C.2.2.4 of this RG. DG-1362, Page 52 • If the licensee’s or applicant’s PRA model includes NDMs that have open finding-level F&Os from the technical assessment peer review against the NDM criteria as endorsed in regulatory positions C.2.2.2.1 and C.2.2.2.2 of this RG, submit discussion of the resolution of the peer review findings for the NDMs. • If the licensee’s or applicant’s PRA model includes NDMs that have not been subjected to the technical assessment peer review against the NDM criteria as endorsed in regulatory positions C.2.2.2.1 and C.2.2.2.2 of this RG, the licensee or applicant should submit documentation associated with NDMs to support a review of the technical acceptability of the NDM by the NRC staff. Such documentation should include detailed descriptions of the NDM, assumptions, scope, limitations, data used along with the bases for data selection, technical bases, equations, etc.) developed or sponsored by the licensee or the applicant. Documentation associated with the implementation of the NDM (e.g., self-assessment reports, peer-review reports including the disposition of findings, independent assessment team closure report, etc.) that have been incorporated to the licensee’s PRA model also should be submitted. DG-1362, Page 53 D. IMPLEMENTATION The NRC staff may use this RG as a reference in its regulatory processes, such as licensing, inspection, or enforcement. However, the NRC staff does not intend to use the guidance in this RG to support NRC staff actions in a manner that would constitute backfitting as that term is defined in 10 CFR 50.109, “Backfitting” (Ref. 43), and as described in NRC Management Directive 8.4, “Management of Backfitting, Forward Fitting, Issue Finality, and Information Requests” (Ref. 44), nor does the NRC staff intend to use the guidance to affect the issue finality of an approval under 10 CFR Part 52, “Licenses, Certifications, and Approvals for