Document: NUREG-0800
Document ID: 817bb0ad-6fd7-433e-aa2b-b4b3e1166f9c
Document Type: srp
Title: PROBABILISTIC RISK ASSESSMENT AND SEVERE ACCIDENT EVALUATION FOR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0717/ML071700652.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
CFR Part: 
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pe, level of detail, and technical adequacy are appropriate for its uses and risk-informed applications. The staff should review the applicant’s uses and risk-informed applications (or proposed uses and applications)6 of the PRA for each phase (i.e., design, licensing, construction, operations). Specifically, the PRA staff should interface with the primary review branch in the evaluation of licensee programs that use the PRA results and insights (e.g., human factors program, severe accident management program, maintenance rule implementation, interface with the reactor oversight process, RAP). Likewise, the PRA staff should interface with the primary review branch in the evaluation of specific risk- informed applications (e.g., 10 CFR 50.69 implementation, risk-informed performance- based fire protection implementation, risk-informed inservice inspection, risk-informed inservice testing). When the applicant enters a new phase, the staff review may include evaluating any changes to the uses and applications (or proposed uses and applications of subsequent phases). The PRA staff should review the applicant’s PRA and its associated results and insights, addressing the full scope of operations (full power, low power, shutdown), as discussed below. A. Internal Events at Full Power For internal events occurring under full-power operating conditions, this review should address the PRA results and insights of the plant-specific PRA. This review should ensure that the internal events are properly evaluated, including 7 In the context of the PRA results and insights, the term “significant” is intended to be consistent with its usage in the American Society of Mechanical Engineers (ASME) PRA Standard, ASME RA-Sb-2005 Addenda to ASME RA-S-2002. 8 In the context of the PRA, the phrase “assumption” is intended to be consistent with its usage in RG 1.200. 9 “PRA-based insights” are those insights identified during the DC process that ensure that assumptions made in