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:
ited to the design-specific aspects within the scope of the design certification. The design-specific PRA developed during the DC stage may not identify site-specific information (e.g., local hazards, switchyard and offsite grid configuration, and ultimate heat sink) and may not explicitly model all aspects of the design (e.g., balance of plant). A seismic PRA cannot be performed without a site-specific probabilistic seismic hazard analysis (PSHA) and as-built information. Consequently, a seismic margin analysis (SMA) is acceptable. This SRP provides guidance for reviewing PRA-based SMA submitted in support of a DC or COL application. DC/COL-ISG-20 (Reference 24) discusses post-DC activities to update the PRA-based SMA throughout the licensing process of new reactors, including COL action items and post-licensing activities, to ensure a coherent and consistent process for the quality of PRA-based SMA to adequately meet Title 10 of the Code of Federal Regulations (10 CFR) 52.47(a)(27), 10 CFR 52.79(a)(46), 10 CFR 52.79 (d)(1) and 10 CFR 50.71(h). The applicant’s design-specific PRA may include assumptions regarding site parameters and the interfaces with undeveloped aspects of the design. This is acceptable at the DC stage and results in the identification of PRA-based insights that include design, site, and operational assumptions. Although the staff has not published a format and content document specific to DC applications, RG 1.206, Section C.I.19, is intended to include all information needed for the staff to review a COL application that does not refer to a DC. Therefore, DC applicants are expected to provide the material in RG 1.206, Section C.I.19, except for those elements that require site-specific or plant-specific information not yet available. As indicated above, format and content guidance for COL applications is provided in RG 1.206. COL applicants not referring to a DC should follow the guidance in RG 1.206, Section C.I.19. The staff will review the