Document: NUREG-0800
Document ID: 4865fc6d-b85f-4173-9bca-162fa9fe67d2
Document Type: srp
Title: Appendix 7-A
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500555.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
chitecture), function, people (design and verification/validation team), and initiating events. 2. Information to be Reviewed The information to be reviewed is the D-in-D&D assessment conducted by the applicant/licensee. 3. Acceptance Criteria The D-in-D&D assessment submitted by the applicant/licensee should demonstrate compliance with the four-point position described above. To reach a conclusion of acceptability, the following four conclusions should be reached and supported by summation of the results of the analyses: 1. For each anticipated operational occurrence in the design basis occurring in conjunction with each single postulated common-mode failure, the plant response calculated using best-estimate (realistic assumptions) analyses should not result in radiation release exceeding 10% of the 10 CFR 100 guideline value, or violation of the integrity of the primary coolant pressure boundary. The applicant/licensee should either (1) demonstrate that sufficient diversity exists to achieve these goals, or (2) identify the vulnerabilities discovered and the corrective actions taken, or (3) identify the vulnerabilities discovered and provide a documented basis that justifies actions not taken. 2. For each postulated accident in the design basis occurring in conjunction with each single postulated common-mode failure, the plant response calculated using best-estimate (realistic assumptions) analyses should not result in radiation release exceeding the 10 CFR 100 guideline values, violation of the integrity of the primary coolant pressure boundary, or violation of the integrity of the containment (i.e., exceeding coolant system or containment design limits). The applicant/licensee should either (1) Appendix 7-A Rev. 4 — June 1997 BTP HICB-19-5 demonstrate that sufficient diversity exists to achieve these goals, or (2) identify the vulnerabilities discovered and the corrective actions taken, or (3) identify the vulnerabilities discovered and provide a documented