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:
(PRA), in total or the portions that are used to support an application, is sufficient to provide confidence in the results, such that the PRA can be used in regulatory decision-making for light-water reactors (LWRs). When used in support of an application, this RG will obviate the need for an in-depth review of the base PRA by NRC reviewers, allowing them to focus their review on key assumptions and areas identified by peer reviewers as being of concern and relevant to the application. This revision is consistent with the NRC’s PRA Policy Statement, “Use of Probabilistic Risk Assessment Methods in Nuclear Regulatory Activities; Final Policy Statement” (Ref. 1). This RG endorses, with staff exceptions and clarifications, national consensus PRA standards provided by standards development organizations, and guidance provided by nuclear industry organizations. Applicability This RG applies to LWR licensees subject to Title 10 of the Code of Federal Regulations (10 CFR) Part 50, “Domestic Licensing of Production and Utilization Facilities” (Ref. 2), and 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants” (Ref. 3). The NRC staff may perform a more in-depth review of the PRA acceptability for applications including, but not limited to design certifications (DCs) or combined licenses (COLs), where following aspects of this guide in certain areas of the application may not be feasible or are not applicable. Other applications and situations may also warrant a more in-depth review including, among others, unique and novel requests, unique technical and factual circumstances, or novel methods and analysis. DG-1362, Page 2 Applicable Regulations • 10 CFR Part 50, “Domestic Licensing of Production and Utilization Facilities.” The regulations in this part provide for the licensing of production and utilization facilities pursuant to the Atomic Energy Act of 1954, as amended and Title II of the Energy Reorganization Act of 1974,