Document: NUREG-0800
Document ID: 16c1145e-ffe2-48c4-bd44-0ccaeb83dc99
Document Type: srp
Title: FIRE PROTECTION PROGRAM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070563.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.1
CFR Part: 
CFR Title: 

Content:
pression Systems Halon fire extinguishing systems should comply with the requirements of NFPA 12A and NFPA 12B (Reference 12) , "Halogenated Fire Extinguishing Agent Systems - Halon 1301 and Halon 230 1211.". Only UL-listed (Reference 63) or FM-approved agents should be used. Provisions 231 232 DRAFT Rev. 4 - April 1996 9.5.1-52 for locally disarming automatic Halon systems should be key locked and under strict administrative control. Automatic Halon extinguishing systems should not be disarmed unless controls as described in Position C.2.cj. are provided. 233 In addition to the guidelines of NFPA 12A and 12B, preventive maintenance and testing of the systems, including check-weighing of the Halon cylinders, should be done at least quarterly. Particular consideration should also be given to: (1) Minimum required Halon concentration, distribution, soak time, and ventilation control; (2) Toxicity of Halon; (3) Toxicity and corrosive characteristics of the thermal decomposition products of Halon; and (4) Location and selection of the activating detectors. e. Carbon Dioxide Suppression Systems Carbon dioxide extinguishing systems should comply with the requirements of NFPA 12, "Carbon Dioxide Extinguishing Systems.". Where automatic carbon dioxide systems are used, 234 they should be equipped with a predischarge alarm system and a discharge delay to permit personnel egress. Provisions for locally disarming automatic carbon dioxide systems should be key locked and under strict administrative control. Automatic carbon dioxide extinguishing systems should not be disarmed unless controls as described in Position C.2.cj. are provided. 235 Particular consideration should also be given to: (1) Minimum required CO concentration, distribution, soak time, and ventilation control; 2 (2) Anoxia and toxicity of CO ; 2 (3) Possibility of secondary thermal shock (cooling) damage; (4) Conflicting requirements for venting during CO injection to prevent overpressurization 2 versus