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:
r the redundant success path located in the same area, and a fire involving combustibles other than those in either redundant success path may constitute an exposure fire to multiple redundant success paths located in the same area. fire area: The portion of a building or plant that is separated from other areas by rated fire barriers adequate for the fire hazard. fire barrier: Components of construction (walls, floors, and their supports), including beams, joists, columns, penetration seals or closures, fire doors, and fire dampers, that are used to prevent the spread of fire and that are rated by approving laboratories in hours of resistance to fire. fire brigade: A team of onsite plant personnel that is qualified and equipped to perform manual fire suppression activities. fire hazards: Conditions that involve the necessary elements to initiate and support combustion, including in situ or transient combustible materials, ignition sources (e.g., heat, sparks, open flames), and an oxygen environment. fire hazard analysis: An analysis used to evaluate the capability of a nuclear power plant to perform safe-shutdown functions and minimize radioactive releases to the environment in the event of a fire. The analysis includes the following features: a. identification of fixed and transient fire hazards; b. identification and evaluation of fire prevention and protection measures related to the identified hazards; and c. evaluation of the impact of fire in any plant area on the ability to safely shut down the reactor and maintain shutdown conditions, as well as to minimize and control the release of radioactive material. fire protection compensatory measures: Any action that is put in place by the licensee for impaired, nonfunctional, out-of-service, degraded or inoperable fire protection systems, equipment, or features required by the nuclear power plant’s post-fire safe-shutdown analysis and the action is needed to maintain compliance with applicable fire protection