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:
tations is free of fire damage. b. The alternative configuration ensures that fire damage to equipment necessary to achieve cold shutdown is limited and can be repaired within a reasonable time (minor repair using components stored on the site). c. Modifications required to meet Appendix R requirements would not enhance fire protection safety levels above those provided by either existing or proposed alternatives. The staff will also accept an alternative fire protection configuration on the basis of a detailed fire hazards analysis, when the licensee can demonstrate that modifications required to meet the requirements of Appendix R would be detrimental to overall facility safety, the alternative configuration satisfies the above criteria, and the alternative configuration provides an adequate level of fire safety. The licensee should file requests for exemptions from the requirements of 10 CFR 50.48 and Appendix R to 10 CFR Part 50 in accordance with 10 CFR 50.12. 1.8.3 Appendix R Equivalency Evaluations The NRC’s interpretations of certain Appendix R requirements allow a licensee to choose not to seek prior NRC review and approval of, for example, a fire-area boundary, in which case a fire protection engineer (assisted by others, as needed) should perform an evaluation. The licensee should ensure that such evaluations are written and organized to facilitate review by a person not involved in the evaluation. The evaluation should include all supporting calculations and clearly state all assumptions at the outset. The licensee should retain these evaluations for subsequent NRC inspections. Appendix A to this guide provides examples of previously accepted equivalency evaluations. DG-1359, Page 37 1.8.4 License Amendments Plants licensed after January 1, 1979, that have committed to meet the requirements of Sections III.G, III.J, and III.O of Appendix R to 10 CFR Part 50, 10 CFR Part 52, or NRC guidance (e.g., BTP CMEB 9.5-1), and are required to do so as a license