Document: NRC Regulatory Guide
Document ID: 666e1303-0170-4974-a7d6-af27eb586524
Document Type: regulatory_guide
Title: Risk-Informed, Performance-Based Fire Protection for Existing Light-Water Nuclear Power Plants (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2104/ML21048A448.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.205
CFR Part: 
CFR Title: 

Content:
e NRC considers probabilistic safety analysis and PRA to be synonymous. This RG will use PRA. The term “fire PRA,” as used in this RG, encompasses all levels and types of PRAs, including fire PRAs created before the issuance of NUREG/CR-6850/EPRI 1011989, the fire portions of individual plant examinations of external events, and enhanced PRAs for internal events. RG 1.205, Revision 2, Page 6 RG, the NRC considered IAEA Safety Requirements and Safety Guides2 pursuant to the Commission’s International Policy Statement (Ref. 15) and Management Directive and Handbook 6.6 (Ref. 16). In development of this RG, the following IAEA Safety Requirements and Guides were considered: • NS-G-1.7, “Protection Against Internal Fires and Explosions in the Design of Nuclear Power Plants” (2004). • NS-G-2.1, “Fire Safety in the Operation of Nuclear Power Plants” (2000). Documents Discussed in Staff Regulatory Guidance This RG endorses, in part, the use of one or more codes or standards developed by external organizations and other third party guidance documents. These codes, standards and third party guidance documents may contain references to other codes, standards or third party guidance documents (“secondary references”). If a secondary reference has itself been incorporated by reference into NRC regulations as a requirement, then licensees and applicants must comply with that standard as set forth in the regulation. If the secondary reference has been endorsed in a RG as an acceptable approach for meeting an NRC requirement, then the standard constitutes a method acceptable to the NRC staff for meeting that regulatory requirement as described in the specific RG. If the secondary reference has neither been incorporated by reference into NRC regulations nor endorsed in a RG, then the secondary reference is neither a legally-binding requirement nor a “generic” NRC approved acceptable approach for meeting an NRC requirement. However, licensees and applicants