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:
The fire protection program should identify controls to protect structures containing radioactive materials from an exposure fire. The fire hazard presented by transient combustibles, including stored materials, debris, vegetation, and nearby or contiguous structures, should be considered. NFPA 80A presents additional information. 4. PHYSICAL FIRE PROTECTION FEATURES The ability to rapidly detect, control, and suppress fires is one of the primary defense-in-depth objectives of the fire protection program. The plant’s fire hazards and the potential of these hazards to result in the release or spread of radioactive materials govern the need for physical protection features. 4.1 Fire Detection and Alarms Systems Detection systems in operating reactor facilities are generally placed where fire hazards present an exposure threat to safety-related equipment. Alarm systems are provided to alert plant staff to a detected fire or operation of an automatic suppression system. During decommissioning, the fire hazards and the associated detection and alarm requirements may change significantly. The change in priorities from protecting safety-related equipment required for DG-1370, Page 17 safe shutdown to protecting against the release or spread of radioactive material may require reevaluation of the detection and alarm system design to ensure that the fire hazards of decommissioning are adequately addressed. Fire alarm and supervisory signals should be annunciated in a constantly attended location. The fire alarm system should provide a signaling system for notifying plant personnel. Refer to NFPA 72, “National Fire Alarm and Signaling Code” (Ref. 33). The fire alarm system should meet the following criteria: a. The operation of an automatic fire suppression system initiates a fire alarm. b. Automatic fire detection systems using smoke, heat, or flame detectors, as appropriate, are maintained for early detection of fires. The alarm system maintains supervision of