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:
P Section 19.1. The staff will confirm that the licensee has provided a description of its processes for assuring the PRA model is maintained 9.5.1.2-15 Rev. 0 – December 2009 and updated to reflect the as-built, as-operated and maintained plant, including operating experience of the plant, using SRP Section 19.1. The staff will review the licensee’s assessment of the technical adequacy of the PRA model used for any risk evaluations required to transition to a RI/PB FPP, including resolution of peer review findings and licensee self-assessments. III.5.2 DID and Safety Margins The staff will ensure that the licensee’s plant change evaluations (Section III.5.3 of this SRP) and fire risk evaluations (Section III.5.5 of this SRP) ensure that the philosophy of DID is maintained relative to fire protection and nuclear safety. [NFPA 805, Section 2.4.4.2 and Section 4.2.4.2] Fire protection DID is achieved when an adequate balance of each of the following elements is provided: [NFPA 805, Section 1.2] 1. Preventing fires from starting 2. Rapidly detecting fires and controlling and extinguishing promptly those fires that do occur, thereby limiting fire damage 3. Providing an adequate level of fire protection for SSCs important to safety, so that a fire that is not promptly extinguished will not prevent essential plant safety functions from being performed SRP Section 19.2 provides guidance on nuclear safety DID. The staff will ensure that the licensee’s plant change evaluations ensure that sufficient safety margins are maintained. [NFPA 805, Section 2.4.4.3] With sufficient safety margins: • Codes and standards or their alternatives approved for use by the NRC are met; and, • Safety analysis acceptance criteria in the licensing basis are met, or proposed revisions provide 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