Document: NRC Regulatory Guide
Document ID: 22ccfd5e-c5d8-4615-a02c-32369aa9f533
Document Type: regulatory_guide
Title: Acceptability of Probabilistic Risk Assessment Results for Risk-Informed Activities (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1930/ML19308B636.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.200
CFR Part: 
CFR Title: 

Content:
to confirm PRA inputs • Reviews results of each PRA technical element for reasonableness • Reviews PRA maintenance and update process • Reviews PRA modification attributable to use of different model, techniques, or tools • Reviews against modifications to the standard Team Qualifications • Independent with no conflicts of interest (i.e., should be prohibited from peer reviewing any portion of the PRA they have performed or supervised work on) • The peer reviewer is not assigned an area for review where their current immediate supervisor performed or supervised the actual technical analysis • Collectively represent expertise in all the technical elements of a base PRA including integration • Expertise in the technical element assigned to review • Knowledge of the plant design and operation • Knowledge of the peer review process DG-1362, Page 43 Table 17. Summary of the Characteristics and Attributes of a PRA Peer Review Element Characteristics and Attributes Documentation • Describes the peer review team qualifications • Describes the peer review process • Documents where the base PRA does not meet desired characteristics and attributes • Assesses and documents significance of deficiencies • Documents resolutions of deficiencies sufficient to readily allow implementation of resolutions • Describes the scope of the peer review performed (i.e., what was reviewed by the peer review team) • Documents the justification for not reviewing requirements included in the scope of the peer review • Any PRA upgrades or NDMs • Identification of the key assumptions (relative to the base PRA) reviewed and the result of the review Peer Review of a PRA Upgrade or a Newly Developed Method A peer review is performed on a PRA upgrade, which includes the use of an NDM in a PRA. Appendix C provides the guidance for determining whether a change to the base PRA is a PRA upgrade or a PRA maintenance and, if it is a PRA upgrade, whether the change