Document: NUREG-0800
Document ID: 8dd882f4-a34f-4415-acd1-ebb441c72786
Document Type: srp
Title: PROBABILISTIC RISK ASSESSMENT AND SEVERE ACCIDENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1213/ML12132A481.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
CFR Part: 
CFR Title: 

Content:
e propagation through potentially failed fire barriers. 4. The reviewer confirms that the applicant reports the CDF and LRF derived from the fire PRA in the FSAR and provides a characterization of the dominant accident sequences and associated major contributors to CDF for each sequence in the FSAR. Design-Specific PRA (Treatment of High Winds ) 1. The reviewer evaluates the applicant’s methodology and use of data for estimating initiating event frequencies and assumptions in its high winds risk assessment and verifies that the methodology is consistent with the state-of-the art and that the assumptions are reasonable for estimating the CDF associated with high wind events that could damage the plant. Design-Specific PRA (Procedures for Specific PRA Audit Topics) 1. The staff will determine that the scope, level of detail, and technical adequacy of the design-specific and plant-specific PRA are appropriate for the application and any identified uses and risk-informed applications, as follows. 19.0-27 Draft Revision 3 – September 2012 A. The applicant’s analyses should be comprehensive in scope and address all applicable internal and external events and all plant operating modes. Since some aspects of the applicant’s approach may involve non-PRA techniques to address specific events (e.g., PRA-based seismic margins), the PRA staff review should ensure that the scope of the applicant’s analyses is appropriate for the identified uses and applications of the PRA. B. The level of detail of the applicant’s PRA should be commensurate with the identified uses and applications of the PRA (e.g., sufficient to gain risk-informed insights and use such insights, in conjunction with assumptions made in the PRA, to identify and support requirements important to the design and plant operation). The PRA should reasonably reflect the actual plant design, construction, operational practices, and relevant operational experience of the applicant and the industry. The burden