Document: NUREG-0800
Document ID: 7f6b0af0-d79e-4704-9eac-aa03109a7731
Document Type: srp
Title: RISK-INFORMED DECISIONMAKING: TECHNICAL SPECIFICATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0425/ML042520260.pdf
Revision Date: 2023-06
Chapter: 16
Section ID: 16.1
CFR Part: 
CFR Title: 

Content:
w process, the qualification of the reviewers, a summary of the review findings, and resolutions to these findings when applicable. Industry PRA certification programs and PRA cross-comparison studies could also be used to help ensure appropriate scope, level of detail, and quality of the PRA. If such a program or studies are to be used, a description of the program, including the approach and standard or guidelines to which the PRA is compared; the depth of the review; and the make-up and qualifications of the personnel involved should be provided for NRC review. Based on the peer review or other certification process and on the findings from this process, the licensee should justify why the PRA is adequate for the present TS application in terms of scope and quality. A peer review, SRP 16.1-17 Rev. 0 - August 1998 certification, or cross-comparison would not replace a staff review in its entirety, although the more confidence the staff has in the review that has been performed by or for the licensee, the less rigor should be expected of the staff review. For most TS reviews, demonstration of PRA quality by means of an industry certification or cross-comparison process, in combination with a focus-scoped staff review, should be sufficient. Cross-comparisons are most appropriate when the system designs are similar across the plants being compared. Some licensees may elect to use the PRA underlying their individual plant examination (IPE) to analyze the risk impact associated with requested TS changes. It should be noted that the NRC staff's review of the IPE submittal alone does not suffice as an adequate review for TS applications. b) Scope A full scope PRA (Level 3) is not needed for TS evaluations. Also, in most cases, a Level 2 PRA with external events for all modes of operation will not be required for TS change applications. As a minimum, for systems used to prevent core damage (i.e., most of the TS systems modeled in a PRA other than the containment systems),