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:
hould review the fire PRA for acceptability. Licensees may use PRA and/or risk insights gained from other methods in support of proposed changes to the plant licensing basis, such as license amendment requests pursuant to 10 CFR 50.90 and 50.92. RG 1.174, “An Approach for Using Probabilistic Risk Assessment In Risk- Informed Decisions on Plant-Specific Changes to the Licensing Basis,” provides guidelines for the use of PRA in support of plant changes that require NRC approval. Plant changes that are not subject to NRC approval are not within the scope of RG 1.174. Where PRA is used by licensees in support of submittals to change the plant licensing basis, the guidelines of SRP Chapter 19 should be followed. Licensees may apply fire modeling methodologies to a performance-based evaluation of the FPP and to changes to the program. Fire modeling results can provide input to a change evaluation, but the change should also be evaluated for the impact on plant risk, defense-in- 9.5.1-25 Revision 5 - March 2007 depth, and safety margin. Licensees should document that the fire models and methods used meet NRC requirements. The licensee should also document that the models and methods used in performance-based analyses are used within their limitations and with the rigor required by the nature and scope of the analyses. These analyses may use simple hand calculations or more complex computer models, depending on the specific conditions of the scenario being evaluated. The NRC’s Office of Nuclear Regulatory Research (RES) and the Electric Power Research Institute (EPRI) have documented the verification and validation (V&V) for parts of five fire models in draft NUREG-1824/EPRI 1011999, “Verification and Validation of Selected Fire Models for Nuclear Power Plant Applications.” The specific fire models documented are (1) NUREG-1805, “Fire Dynamics Tools (FDTs),” (2) Fire-Induced Vulnerability Evaluation (FIVE), Revision 1, (3) the National Institute of Standards