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:
ntify the SSCs, such as the plant ventilation systems, necessary to prevent or mitigate the release of radioactive materials in a fire. Consideration should be given to the control of runoff from fire suppression activities in areas containing radioactive materials. The onsite and offsite radioactive releases expected from a fire should be quantified or referenced in the fire hazards analysis and compared to the dose limits in 10 CFR Part 20. As decommissioning progresses, the radiological hazards may change as areas and structures are decontaminated, contaminated components are removed, the spent fuel storage configuration is changed (e.g., from pool to dry cask or removed to an ISFSI), and contaminated waste accumulates (before being transported to an offsite storage facility). System configurations and requirements may also change with changing hazards and the general progression of decommissioning activities; the analysis should reflect significant changes. 2.4.1 Spent Fuel The fire protection SSCs necessary to protect the spent fuel should be identified and may include the spent fuel storage enclosure and pool, spent fuel pool cooling and makeup systems, and any necessary support systems, such as instrumentation and control, ventilation, and electrical power systems. The fire hazards analysis should describe the fire threats, the associated measures to protect the spent fuel, and any associated SSCs that are important to maintaining spent fuel integrity. Appendix A to this guide provides guidance on the level of fire protection acceptable to the NRC staff for spent fuel areas and other areas DG-1370, Page 11 where a fire could potentially affect SSCs required to maintain spent fuel integrity. 2.4.2 Contaminated Plant Areas and Waste Storage The fire hazards analysis should identify areas of the plant that contain significant radioactive contamination that might be released or spread by the effects of a fire. As the plant is decontaminated and dismantled,