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
CFR Part: 
CFR Title: 

Content:
onsible for the review of severe accident issues, including severe accident management alternatives, in Sections 7.2 and 7.3 of the Environmental Report (ER) need to maintain coordination with the PRA staff to assure consistency in the review of severe 19.0-5 Revision 3 – December 2015 accident information given in the ER and the review of severe accident evaluations in Chapter 19 of the FSAR. The NRC technical branch responsible for PRA reviews the acceptability of the applicant’s methodology for identifying risk-important human actions. The human factors engineering staff is responsible for ensuring that risk-important human actions included in HFE design process are the same as those identified in Chapter 19. The NRC reviewers should be aware that risk- important human actions may be distributed throughout multiple Chapter 19 tables, a practice that has caused delay in completing reviews. The NRC technical branch responsible for the review of information in Chapter 19 of a DC or COL application obtains support from reviewers responsible for the review of instrumentation and control (I&C) described in Chapter 7 of a DC or COL FSAR, as necessary, to confirm that: 1. The analysis adequately accounts for the I&C systems relied upon; 2. There is reasonable assurance that the I&C systems needed for mitigation of events beyond the design basis (including severe accidents) are designed to perform their intended function in the environment expected during the event, and over the time span for which they are needed; 3. All common cause failure (CCF) mechanisms for digital instrumentation and control (DI&C) systems have been accounted for in the PRA. II. ACCEPTANCE CRITERIA Requirements for DC Applicants 1. 10 CFR 51.55(a) states that each DC application must include a separate document entitled “Applicant’s Environmental Report - Standard Design Certification,” which must address the costs and benefits of the severe accident mitigation design alternatives