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:
intain post-fire hot shutdown, not including “repairs.” Operator manual actions include an integrated set of actions needed to ensure that hot shutdown can be accomplished for a fire in a specific plant area. The manual operation of valves, switches, and circuit breakers is allowed to operate equipment and isolate systems in accordance with Regulatory Position 5.3.1.3 and is not considered a repair. post-fire safe-shutdown analysis: A process or method of identifying and evaluating the capability of SSCs necessary to accomplish and maintain safe-shutdown conditions in the event of a fire. post-fire safe-shutdown circuits: Electrical circuits in which a fire-induced failure (e.g., short circuit, short to ground) could prevent safe shutdown, either directly (e.g., loss of power to a safe-shutdown pump) or indirectly (e.g., spurious opening of a flow diversion path because of one or more control circuit hot shorts, failure of a motor-operated valve to perform an active post-fire safe-shutdown function caused by the fire-induced failure of a valve protective circuit). post-fire safe-shutdown system and equipment: Systems and equipment that perform functions needed to achieve and maintain safe shutdown during and following a fire (regardless of whether the system or equipment is part of the success path for safe shutdown). This includes systems and equipment for which a fire-induced spurious actuation could prevent safe shutdown. pre-fire plans: Documentation that describes the facility layout, access, contents, construction, hazards, hazardous materials, types and locations of fire protection systems, and other information important to the formulation and planning of emergency fire response. raceway: An enclosed channel of metal or nonmetallic materials designed expressly for holding wires, cables, or busbars, with additional functions as permitted by code. Raceways include, but are not limited to, rigid metal conduit, rigid nonmetallic conduit, intermediate metal