Document: NRC Regulatory Guide
Document ID: cde52d5a-adf9-49be-9d1f-59449dfca895
Document Type: regulatory_guide
Title: TRIAL - Acceptability of Probabilistic Risk Assessment Results for Non-Light Water Reactor Risk-Informed Activities
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2123/ML21235A008.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.247
CFR Part: 
CFR Title: 

Content:
assumptions and areas identified as being of concern and relevant to the application and the demonstration of PRA acceptability. The purpose of a trial RG is to allow adequate experience to be gained with the use and implementation of the guidance. Based on that experience and other potential changes to staff positions, the trial RG may be finalized after the trial use period to incorporate the related lessons learned, any comments received on the trial RG, or other pertinent information. This guide is consistent with the NRC’s PRA Policy Statement, “Use of Probabilistic Risk Assessment Methods in Nuclear Regulatory Activities; Final Policy Statement,” dated August 16, 1995 (Ref. 1). Also, it endorses, with staff exceptions, a national consensus PRA standard provided by standards development organizations and industry guidance on PRA peer review. Applicability This RG applies to applications for NLWR licensing under Title 10 of the Code of Federal Regulations (10 CFR) Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants” (Ref. 2). Specific applicable regulations include the following: • standard design certification (DC): 10 CFR Part 52, Subpart B • combined license (COL): 10 CFR Part 52, Subpart C RG 1.247, Page 2 • standard design approval (SDA): 10 CFR Part 52, Subpart E • manufacturing license (ML): 10 CFR Part 52, Subpart F This RG also applies to applications for NLWR licensing under 10 CFR Part 50, “Domestic licensing of production and utilization facilities” (Ref. 3). Specific applicable regulations include the following: • construction permit (CP): 10 CFR Part 50 • operating license (OL): 10 CFR Part 50 Applicable Regulations The following regulations are directly applicable to the use of PRA in licensing activities for NLWRs1: • 10 CFR Part 50 provides 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