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:
.47(8) or 10 CFR 52.79(a)(17), for a DC or a COL application, respectively. In particular, both regulations invoke 10 CFR 50.34(f)(1)(i) to specify that a design- specific or plant-specific PRA should be performed to seek improvements in core heat removal system reliability and containment heat removal system reliability that are significant and practical and do not excessively impact the plant. 3. The reviewer compares the design features that affect containment performance and the calculated performance of the containment with published results for operating plants and evaluates whether or not the design under review is robust and has a high tolerance for severe accidents when compared to that of the operating plants. The comparison and conclusions are documented in the SER. 4. The reviewer identifies the design features and requirements introduced by the applicant to reduce or eliminate significant contributors to risk in existing operating plants and 19.0-38 Draft Revision 3 –November 2014 evaluates the extent to which these features provide a good balance between prevention and mitigation. The evaluation is documented in the SER. 5. 6. Using acceptance criteria listed above in Section II, the reviewer evaluates the applicants assessment of structural performance of the containment under severe accident loads which encompasses: (1) an assessment of the Level C (or factored load) pressure capability of the containment in accordance with 10 CFR 50.44(c)(5), (2) demonstration of the containment capability to withstand the pressure and temperature loads induced by the more likely severe accident scenarios as stipulated in SECY-93-087, Section I.J, (3) a containment structural fragility assessment for overpressurization, and (4) seismic HCLPF assessment of the containment in meeting the SECY-93-087, Section II.N, expectation. IV. EVALUATION FINDINGS The reviewer verifies that the applicant has provided sufficient information and that the review and calculations (if