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:
essed within the COL application. 14. The staff will determine whether FSAR Chapter 19 includes PRA quantitative and qualitative results, including CDF, LRF, the identification of key PRA assumptions, the identification of PRA-based insights, and discussion of the results and insights from importance, sensitivity, and uncertainty analyses. 15. The staff will determine whether the internal events PRA quantitative results are provided for internal fires and floods and their contributions. 16. It is acceptable for applicants to report significant risk contributors by separate hazard groups (i.e., provide separate lists of the contributors for internal events, the contributors for internal floods, the contributors for seismic events, the contributors for internal fires, etc.). Applicants may also elect to develop an integrated list of significant risk contributors that summarize the results across all hazard groups. 17. In the context of the PRA results and insights, the term “significant” is intended to be consistent with its definition in RG 1.200. The definitions of “significant accident sequence” and “significant contributor” are suitable for both LERF and LRF. Using any other definition of “significant” inconsistent with the definitions provided by RG 1.200 shall be subject to additional staff review and approval. 18. The NRC staff should review the applicant’s PRA maintenance process, which should be described in FSAR Chapter 19, including planned implementation of the program during design, construction and operation phases of the facility. The NRC expects COL 19.0-15 Revision 3 – December 2015 applicants to describe their approach for maintaining and periodically upgrading the PRA in accordance with RG 1.206, Section C.I.19.7 and RG 1.200. PRA maintenance should commence at the time of application for both DC and COL applicants. If the certification is issued, the generic PRA would not need to be updated except as appropriate in connection