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:
tion of decommissioning activities. Conservative estimates of the radioactive material content for stored wastes should be established, to the extent possible, based on standard survey and measurement requirements. These estimates, combined with any contamination in the area, should be used as the basis for estimating potential radioactive material releases in a fire. Potential releases of radioactive materials should be quantified by conservative analyses of the fire-related source term, the capabilities of mitigating systems, and emergency response actions. Exposures resulting from the fire-induced release of radioactive materials must not exceed the limits in 10 CFR Part 20. Radioactive waste storage areas within existing plant structures should provide adequate fire protection to minimize the potential for fire and the subsequent release of radioactive materials from the direct effects of smoke, hot gases, and fire suppression activities. SSCs necessary to protect radioactive waste and mitigate any radiological release should be evaluated and protected from the effects of fire, as appropriate. These SSCs include structures that provide separation and confinement, building ventilation, instrumentation and controls, and electrical power. Rated fire barriers should be maintained that separate significant fire hazards, the waste storage and accumulation areas, and SSCs important to the safe storage of the contaminated waste materials. Where adequate separation cannot be provided, the use and storage of combustible materials should be minimized and controlled, and hot-work processes should be limited or restricted in or near the area. Temporary structures used for radioactive waste storage areas should be constructed with noncombustible materials to the extent possible. Radioactive waste packaging should be fabricated of noncombustible or fire-retardant materials. Activities and equipment that are a potential ignition source should be prohibited or strictly