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:
vailable follows from the fact that the standard may be used to support safety decisions. 3. To facilitate the use of the standard for a wide range of applications, categories can be defined to aid in determining the applicability of the PRA for various types of applications. 4. The standard thoroughly and completely defines what is technically required and, where appropriate, identifies one or more acceptable methods. 5. The standard requires a peer review process that identifies and assesses where the technical requirements of the standard are not met. The standard needs to ensure that the peer review process meets the following criteria: – determines whether methods identified in the standard have been used appropriately – determines that, when acceptable methods are not specified in the standard, or when alternative methods are used in lieu of those identified in the standard, the methods used are adequate to meet the requirements of the standard – assesses the significance of the results and insights gained from the PRA of not meeting the technical requirements in the standard – highlights assumptions that may significantly impact the results and provides an assessment of the reasonableness of the assumptions – is flexible and accommodates alternative peer review approaches – includes a peer review team that is composed of members who are knowledgeable in the technical elements of a PRA, are familiar with the plant design and operation, and are independent with no conflicts of interest that may influence the outcome of the peer review [this clause was not in the ASME definition] 6. The standard addresses the maintenance and update of the PRA to incorporate changes that can substantially impact the risk profile so that the PRA adequately represents the current as-designed [added], as-built and as-operated plant. 7. The standard is a living document. Consequently, it should not impede research. It is structured so that, when improvements in the state