Document: NUREG-0800
Document ID: dd4f84a9-8976-44c4-b631-d7c0254f4efc
Document Type: srp
Title: PROBABILISTIC RISK ASSESSMENT AND SEVERE ACCIDENT EVALUATION FOR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1416/ML14161A594.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
CFR Part: 
CFR Title: 

Content:
compares favorably against the Commission’s approved use of a CPG, which includes (1) a deterministic goal that containment integrity be maintained for approximately 24 hours following the onset of core damage for the more likely severe accident challenges and (2) a probabilistic goal that the conditional containment failure probability be less than 0.1 for the composite of all core-damage sequences assessed in the PRA. 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. The staff will determine 19.0-13 Draft Revision 3 –November 2014 that the applicant has provided a sound technical basis for selecting the most likely severe accident challenges or followed the approach outlined in Section C.3.1(a) of RG 1.216.1 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