Document: NRC Regulatory Guide
Document ID: edb75cf4-27e1-4166-989c-25781bd48b98
Document Type: regulatory_guide
Title: Fire Protection Program for Nuclear Power Plants During Decommissioning and Permanent Shutdown (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2007/ML20078K920.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.191
CFR Part: 
CFR Title: 

Content:
ear safety objectives. A licensee may use a low power/shutdown fire probabilistic risk assessment (PRA) model that has been reviewed and approved by the NRC to perform quantitative risk assessments to quantify the change in fire risk during different stages of decommissioning activities. NUREG/CR-7114, “A Framework for Low Power/Shutdown Fire PRA” issued September 2013, describes an approach that licensees can use to develop a fire PRA for use during decommissioning (Ref. 20). NFPA 805 plants may also use qualitative methods in the plant’s previously approved NFPA 805 nonpower operations analysis to evaluate risk during decommissioning activities. Licensees should document how the change to the fire protection program either reduces the fire risk to the plant or meets the risk acceptance criteria described in the approved NFPA 805 fire protection program. An engineering evaluation or risk assessment should be used to demonstrate that the change maintains safety margins and fire protection defense in depth (e.g., fire prevention, fire detection, fire suppression, mitigation, and postfire nuclear safety performance criteria as described in Chapter 1 of NFPA 805). 2. FIRE HAZARDS ANALYSIS The fire hazards analysis provides a comprehensive evaluation of the facility’s fire hazards, the fire protection capability relative to the identified hazards, and the ability to protect spent fuel and other radioactive materials from potential fire-induced releases. The fire hazards analysis in place during plant operation may be used as the baseline, but it should be reevaluated and revised as necessary to reflect the unique or different fire protection issues and strategies associated with decommissioning. At a minimum, DG-1370, Page 10 the fire hazards analysis should address the following items. 2.1 Fire Hazards The fire hazards should be identified specifically, typically by fire area. The fire hazards for a plant undergoing decommissioning may be significantly