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
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Content:
ortance) and risk- decrease (e.g., Fussell-Vesely importance; risk-reduction worth) measures should be used. 8. The staff will determine whether the applicant’s uncertainty analysis identifies major contributors to the uncertainty associated with the estimated risks. For designs using passive safety systems and active defense-in-depth systems, the staff will determine whether the applicant has performed sensitivity studies without credit for the nonsafety- related defense-in-depth systems. These studies provide additional insights about the risk importance of the defense-in-depth systems that are taken into account in selecting nonsafety-related systems for regulatory treatment according to the RTNSS process (See SRP Section 19.3 for additional information). 9. Consistent with the guidance in Section 5 of RG 1.174, the staff expects that the applicant will have subjected its PRA to quality control. In accordance with the Statement of Consideration (72 FR 49365) for the revised 10 CFR Part 52, the PRA is not part of the design-basis information, therefore, the PRA is not subject to the quality assurance requirements of 10 CFR Part 50, “Domestic Licensing of Production and Utilization Facilities,” Appendix B, “Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants.” However, the applicant should describe the quality control program that was applied to the PRA. The reviewer should verify that this quality control program includes, as a minimum, the following elements: A. Use of personnel qualified for the analysis B. Use of procedures that ensure control of documentation, including revisions, and provide for independent review, verification, or checking of calculations and information used in the analyses 19.0-13 Revision 3 – December 2015 C. Documentation and maintenance of records, including archival documentation as well as submittal documentation D. Use of procedures that ensure that appropriate attention and corrective actions