Document: NRC Regulatory Guide
Document ID: 8e45dce1-e1e7-4415-b1dd-7e2a610e545b
Document Type: regulatory_guide
Title: Fire Protection for Nuclear Power Plants (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2023/ML20231A835.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.189
CFR Part: 
CFR Title: 

Content:
3) the National Institute of Standards and Technology (NIST) Consolidated Model of Fire Growth and Smoke Transport, (4) the Electricité de France MAGIC code, and (5) the NIST Fire Dynamics Simulator. NUREG-1824/EPRI 3002002182, Supplement 1, “Verification and Validation of DG-1359, Page 39 Selected Fire Models for Nuclear Power Plant Applications,” issued November 2016 (Ref. 54), updates the V&V for the most current versions of the five fire models, provides additional test data thus expanding the V&V ranges, and addresses additional submodels such as the Thermally Induced Electrical Failure (THIEF) model. Licensees may propose the use of fire models that have not specifically undergone V&V by the NRC; however, licensees are responsible for providing evidence of acceptable V&V of these fire models. The V&V documents for licensee-proposed fire models are subject to NRC review and approval. 2. Fire Prevention Fire prevention is the first line of defense in depth for fire protection. The fire prevention attributes of the program are directly related to the fire protection objective to minimize the potential for fire to occur. These attributes involve design and administrative measures that provide a reasonable level of assurance that the plant is adequately protected against fire hazards, which are managed, and that fire consequences will be limited for those fires that do occur. The licensee should establish administrative controls and procedures to minimize fire hazards in areas containing SSCs important to safety. Appropriate levels of management should review normal and abnormal conditions or other anticipated operations, such as modifications (e.g., breaching fire barriers or fire stops, impairment of fire detection and suppression systems) and transient fire hazard conditions, such as those associated with maintenance and refueling activities. The licensee should implement appropriate compensatory measures, such as fire watches or temporary fire barriers, to