Document: NUREG-0800
Document ID: 69433f0d-1a24-4cf6-b8b9-31109f9f51c5
Document Type: srp
Title: FIRE PROTECTION PROGRAM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190014.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.1
CFR Part: 
CFR Title: 

Content:
been other notable plant fires that have provided insight with respect to specific nuclear plant fire risks and how to protect against them (see e.g., IN 2002-27, “Recent Fires at Commercial Nuclear Power Plants in the United States”). The following discussion of the relative risk significance of the various aspects of a plant FPP applies to all new reactors, whether or not they adopt a risk-informed, performance-based FPP. 9.5.1-18 Revision 5 - March 2007 6.1 Primary Focus of Staff Review Since the new reactor approach to protection of post-fire safe-shutdown capability is to provide installed passive separation of redundant trains, the staff review should focus on the licensee’s approach to train separation. The staff should review the detailed definition of train separation; the method of identifying which systems, components and circuits need to be separated; the assumptions upon which adequate separation is determined; the design and testing of the separation barriers; the approach when full separation is not feasible; the method of verifying that the separation barrier is installed and maintained properly; and the method of verifying that the as-built cable routing provides the separation necessitated by the design. 6.2 Aspects of New Reactor Fire Protection Programs that Reduce Fire Risk The overall maturity of fire protection regulation, nuclear plant operation, and analysis methods and the opportunity to incorporate the benefits in the original plant design will greatly enhance new reactor plant safety. The following aspects of the new reactor FPPs will also enhance post-fire plant safety and should be considered by the staff when reviewing license applications: a. The enhanced fire protection concept and fully-separated 4-train design reduce the safety significance of fire detection/suppression systems, fire brigade response, and other aspects of the FPP for the areas of the plant where the enhanced level of fire protection is provided. b. Where the