Document: NUREG-0800
Document ID: b10297dd-9822-4243-8665-c41d92699ea5
Document Type: srp
Title: RISK-INFORMED, PERFORMANCE-BASED FIRE PROTECTION PROGRAM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0925/ML092590527.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.1.2
CFR Part: 
CFR Title: 

Content:
ovide sufficient margin to account for analysis and data uncertainty. Note that the deterministic approach in NFPA 805 for meeting the performance criteria, as described in Section III.3.2.1, shall be deemed to satisfy the DID and safety margin requirements. [NFPA 805, Sections 2.4.4.2 and 2.4.4.3] III.5.3 Plant Change Evaluations Changes to a previously approved FPP element shall be evaluated with a plant change evaluation. NFPA 805, Section 2.4.4 states: “A plant change evaluation shall be performed to ensure that a change to a previously approved fire protection program element is acceptable. The evaluation process shall consist of an integrated assessment of the acceptability 9.5.1.2-16 Rev. 0 – December 2009 of risk, defense-in-depth, and safety margins. The impact of the proposed change shall be monitored.” Guidance for performing plant changes is provided in RG 1.205, Regulatory Position 3.2, and in NEI 04-02, Section 5.3, Appendix I and Appendix J. The staff will review the licensee’s plant change evaluations using the acceptance guidance of RG 1.174, and SRP Section 19.2. The staff should review any combined changes and cumulative risk as described in Section III.5.6 below. If required to address the acceptance guidance of RG 1.174 and SRP Section 19.2, the staff will confirm the licensee has provided the total core damage frequency (CDF) and large early release frequency (LERF), i.e., risk contributions from internal and external events, including internal fires, to allow comparison with the acceptance guidelines of RG 1.174. III.5.4 Risk of Crediting Recovery Actions Use of RAs, as defined in NFPA 805, Section 1.6.52, to demonstrate the availability of a success path for the nuclear safety performance criteria, does not meet the deterministic requirements in Section 4.2.3 of NFPA 805. NFPA 805, Section 4.2.4 requires that the additional risk presented by the use of these RAs be evaluated.” The staff will review the licensee’s evaluation of