Document: NRC Regulatory Guide
Document ID: 666e1303-0170-4974-a7d6-af27eb586524
Document Type: regulatory_guide
Title: Risk-Informed, Performance-Based Fire Protection for Existing Light-Water Nuclear Power Plants (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2104/ML21048A448.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.205
CFR Part: 
CFR Title: 

Content:
een approved for use by a license amendment, as required by 10 CFR 50.48(c)(4); and (4) combined changes where any individual change would not meet the risk acceptance criteria of the approved license condition. Licensees may request, in accordance with 10 CFR 50.48(c)(2)(vii), NRC approval of a method, with a bounding analysis approach, to use when evaluating minor changes to elements in NFPA 805, Chapter 3. Upon NRC approval of the bounding method, the licensee may make subsequent minor changes to Chapter 3 elements by performing an engineering analysis to demonstrate that the proposed change is within the scope of the approved method and complies with the bounding conditions. The licensee’s fire protection license condition will reference the approval to make these changes. 3.2.4 Plant Changes Without Prior NRC Approval The example license condition in Regulatory Position 3.1 sets forth criteria for making changes to the approved NFPA 805 FPP without prior NRC approval. The risk acceptance criteria for plant changes provided in this example license condition are acceptable to the NRC. Where permitted by the approved fire protection license condition, licensees of plants that have a fire PRA that is in accordance with Regulatory Position 4.3 may make risk-informed changes without prior NRC review and approval. The types of plant changes that may be implemented without prior NRC review and approval will be limited to those for which the risk assessment methods are adequate to demonstrate that any increase in risk will continue to meet the risk acceptance criteria. Licensees must also maintain appropriate levels of defense in depth and adequate safety margins. The licensee should document each plant change evaluation consistent with Section 4 of RG 1.200 and retain the documentation in accordance with the requirements of NFPA 805, Section 2.7. 3.2.5 Combined Changes and Cumulative Risk of Changes Section 2.4.4.1 of NFPA 805 requires licensees to evaluate the