Document: NUREG-0800
Document ID: b8d2b8f5-432a-4c0a-81ab-20231f7d0f28
Document Type: srp
Title: PROBABILISTIC RISK ASSESSMENT AND SEVERE ACCIDENT EVALUATION FOR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1508/ML15089A068.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
CFR Part: 
CFR Title: 

Content:
Reactors,” is conducted with guidance in SRP Section 6.2.5 and performed in coordination with the review of containment performance under severe accident conditions. Other organizations that use the PRA and severe accident evaluation results and insights in their programs, processes, and reviews (e.g., human factors, emergency preparedness, security, inspection, technical specifications (TS), regulatory treatment of nonsafety systems (RTNSS), maintenance rule implementation, fire protection) may need to interface with the PRA staff in evaluating these areas. The PRA staff should be prepared to discuss the prioritization of structures, systems, and components (SSC) based on risk significance, as well as PRA-based insights related to the design. This information will help reviewers of other areas focus their review on safety-significant issues. In addition, PRA staff reviews Tier 1 to ensure appropriate treatment of important insights and assumptions from the PRA as described in Section C.II.1 of RG 1.206, and SRP Section 14.3, “Inspections, Tests, Analyses, and Acceptance Criteria.” The organizations that are responsible for the review of the design of the plant for external natural hazards (e.g., earthquakes, high winds, external fires, external flooding), hazards related to human activities (e.g., transportation and local industry) and in-plant area hazards (internal fire and flooding) may need to support the PRA staff in reviewing these hazards. The PRA staff may also request support from the organizations that review the systems and thermal-hydraulic (T-H) analyses to ensure that the applicant’s PRA properly considers and addresses important issues (e.g., failure mechanisms, system interactions, and T-H modeling and uncertainties). The organizations responsible for the review of severe accident issues, including severe accident management alternatives, in Sections 7.2 and 7.3 of the Environmental Report (ER) need to maintain coordination with the PRA