Document: NRC Regulatory Guide
Document ID: 80776ca5-a83d-4667-9a94-0bffa1befa91
Document Type: regulatory_guide
Title: Fire Protection Guidelines for Nuclear Power Plants (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1221/ML12216A013.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.120
CFR Part: 
CFR Title: 

Content:
ns independent of the normal plant communication system should be installed at preselected stations. (4) A portable radio communiLations system should be provided for use by~the fire brigade and other operations personnel required to achieve safe plant shutdown. This system should not interfere with the communications capabilities of the plant security force. Fixed repeaters installed to permit use of portable radio communication units should be protected from exposure fire damage. Preoperational and periodic testing should demonstrate that the frequencies used for portable radio communication will not affect the actuation of protective Velays. 5. Fire Detection and Suppression a. Fire Detection (1) Area fire detection systems should be provided for all areas that contain, or present potential fire exposure to, safety-related equipment. (2) Fire detection systems should, as a minimum, comply with the requirements of Class A systems as defined in NFPA 72D, "Standard for the Installation, Maintenance and Use of Proprietary Protective Signaling Systems," and Class I circuits as defined in NFPA 70, "National Electrical Code." (3) Fire detectors should, as a minimum, be selected and installed in accordance with NFPA 72E, "Automatic Fire Detectors." Preoperational and periodic testing of pulsed line-type heat detectors should demonstrate that the frequencies used will not affect the actuation of protective relays. (4) Fire detection systems should give audible and visual alarm and annunciation in the control room. Where zoned detection systems are used in a given fire area, lccal means should be provided to identify which detector zone has actuated. Local audible alarms should sound in the fire area. (5) Fire alarms should be distinctive and unique so they will not be confused with any other plant system alarms. (6) Primary and secondary power supplies should be provided for the fire detection system and for electrically operated control valveb for automatic suppression