Document: NUREG-0800
Document ID: 817bb0ad-6fd7-433e-aa2b-b4b3e1166f9c
Document Type: srp
Title: PROBABILISTIC RISK ASSESSMENT AND SEVERE ACCIDENT EVALUATION FOR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0717/ML071700652.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
CFR Part: 
CFR Title: 

Content:
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. The COL reviews correspond to COL application content guidance provided in Regulatory Guide (RG) 1.206, Section C.I.19 on the PRA and the severe accident evaluation. An outline of the final safety evaluation report (FSER) is presented in Appendix A to this SRP section. For a COL application that references a DC, the staff review of the PRA for the COL should focus on the plant-specific aspects of the PRA and site-specific design features that deviate from the referenced DC and the associated differences in risk results and insights. Similar limitation in the scope of the review applies to severe accident evaluations. This review corresponds to RG 1.206, Section C.III.19. An applicant’s FSAR for both a DC or COL application needs to provide a description of the PRA and its results. This requirement is intended to be a qualitative description of insights and uses, as well as some quantitative PRA results, such that the staff can perform the review, ensure risk insights were factored into the design, and make the evaluation findings described in this SRP section. The complete PRA (e.g., models, analyses, data, and codes) will be available for NRC audit. The staff will document any NRC audits performed in audit reports so that they may be referenced in the staff’s safety evaluation report (SER). There are two aspects of the review. The first aspect is the use of the PRA and severe accident evaluation to identify and assess the balance of preventive and mitigative features, including consideration of operator actions, such that the plant’s operation will reflect a reduction in risk compared to existing operating plants.1 The second aspect is the use and application of the PRA