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:
r Reactors” (Ref. 13), with respect to the categorization of structures, systems, and components that are considered in risk-informing special treatment requirements. • RG 1.205, “Risk-Informed, Performance-Based Fire Protection for Existing Light-Water Nuclear Power Plants” (Ref. 14), provides guidance for use in complying with the requirements for risk- informed, performance-based fire protection programs that comply with 10 CFR 50.48(c), “National Fire Protection Association Standard NFPA 805” (Ref. 15), and the referenced 2001 Edition of the National Fire Protection Association (NFPA) standard, NFPA 805, “Performance- Based Standard for Fire Protection for Light-Water Reactor Electric Generating Plants” (Ref. 16). • RG 1.206, “Applications for Nuclear Power Plants” (Ref. 17), provides guidance on the information contained in and submitted with a COL application. This RG discusses the requirements in 10 CFR Part 52 for a COL applicant to conduct a plant-specific PRA and to describe the plant-specific PRA and its results within its final safety analysis report. As required by 10 CFR 50.71, COL holders shall maintain and upgrade the PRA periodically throughout the life of the plant, and the RG provides guidance on demonstrating PRA technical adequacy (i.e., PRA acceptability). • DC/COL-ISG-020, “Seismic Margins Analysis for New Reactors Based on Probabilistic Risk Assessment” (Ref. 18). In accordance with the Commission direction provided in the Staff Requirements Memorandum (SRM)-SECY-93-087, “Policy, Technical, and Licensing Issues Pertaining to Evolutionary and Advanced Light Water Reactor (LWR) Designs” (Ref. 19), DC DG-1362, Page 4 and COL applicants may perform a seismic margins analysis (SMA) to assess seismic risk. DC/COL-ISG-020 provides guidance for developing an acceptable PRA-based SMA. • DC/COL-ISG-028, “Interim Staff Guidance on Assessing the Technical Adequacy of the Advanced Light-Water Reactor Probabilistic Risk