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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CFR Title: 

Content:
sumptions in the PRA related to design areas that have not been completed. Where a design acceptance criteria (DAC) has been approved by the Commission, the staff allows the DAC approach to be used in specific areas (i.e., radiation protection, piping, instrumentation and controls, and human factors engineering) in lieu of detailed design information. However, to allow staff to evaluate the resolution of severe accident issues in the design and to ascertain how the risk insights from the design PRA are derived, DC applicants should address those portions of the design covered by DAC in the design PRAs to the extent practicable. If it is not practical to model certain areas that employ DAC in the design PRA, the applicant should identify those areas and qualitatively assess their impacts on the PRA results and insights. Any assumptions made regarding the reliability or performance of SSCs under DAC during this process shall be verified when the design is finalized. Furthermore, the staff should review the DC applicant’s PRA in accordance with the available guidance on parts of the design where DAC are used. 7. The staff reviews the PRA-related inspections, tests, analyses and acceptance criteria (ITAAC), COL action items, and other commitments, including any actions identified or proposed to address them. The applicant’s PRA-based insights table may be a good starting point for this review, as it should identify these items. The staff should note any item that cannot be resolved until after the COL application phase and review the commitments and schedule for resolution of the given items, and the proposed method of completion. Design-Specific PRA (Level I PRA Technical Adequacy) 1. The reviewer confirms that the applicant has: (1) identified those high-level requirements or attributes of the applicable PRA standard that the PRA did not embody, (2) addressed the impact on the qualitative and quantitative results of the PRA of excluding those high- level