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:
containment failure probability be less than 0.1 for the composite of all core-damage sequences assessed in the PRA. 3. The staff will determine that the applicant has adequately demonstrated that the design properly balances preventive and mitigative features and represents a reduction in risk when compared to existing operating plants. 4. The staff will determine that the applicant has identified risk-informed safety insights based on systematic evaluations of the risk associated with the design such that the applicant can identify and describe the following: A. The design’s robustness, levels of defense-in-depth, and tolerance of severe accidents initiated by either internal or external events B. The risk significance of potential human errors associated with the design 5. The staff will determine that the applicant has complied with 10 CFR 50.34(f)(1)(i), which requires that a plant-specific PRA be performed to seek improvements in the reliability of core and containment heat removal systems that are significant. 6. The staff will determine that the applicant has used the PRA results and insights, including those from uncertainty analyses, importance analyses, and sensitivity studies studies, in an integrated fashion. Expected uses of the PRA are listed in RG 1.206,Section C.I.19.2, and should be addressed in Section 19.1.1 of the applicant’s FSAR, as well as in the descriptions of programs that receive input from the PRA. Guidance related to the specific programs that receive input from the PRA contains acceptance criteria related to these programs. For example, Section C.I.17.4 of RG 1.206 presents the reliability assurance program (RAP) submittal guidance and SRP Section 17.4 gives the associated staff review guidance, including acceptance criteria. 7. The staff will determine that the applicant has performed risk importance studies at the system, train, and component level that adequately provide insights about (1) the systems that contribute the most in