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:
intained of the activities related to PRA maintenance, PRA upgrades, and use of NDMs. The history includes the results of peer reviews that were performed as a result of a PRA upgrade or the use of an NDM. The archival documentation associated with a specific application includes enough information to demonstrate that the scope of the review of the base PRA is sufficient to support the application. This includes the following information: • The impact of the application on the plant design, configuration, or operational practices. • The risk assessment, including a description of the methodology used to assess the risk of the application, how the base PRA model was modified to appropriately model the risk impact of the application, and details of quantification and the results. • The acceptance guidelines and method of comparison. • The scope of the risk assessment in terms of hazard groups and specific accident scenarios and operating modes modeled. • The portions of the PRA required to provide the results needed to support comparison with the acceptance guidelines. • Documentation associated with NDMs (e.g., detailed descriptions of the NDM, assumptions, scope, limitations, data used along with the bases for data selection, technical bases, equations, etc.) developed or sponsored by the licensee or the applicant. Documentation associated with the implementation of the NDM (e.g., self-assessment reports, peer-review reports including the disposition of findings, independent assessment team closure report, etc.) that have been incorporated to the licensee’s PRA model. If the licensee or the applicant has used an NDM developed by a vendor or a different licensee, information on that NDM received from that vendor, licensee, or the applicant. 4.2 Licensee or Applicant Submittal Documentation To demonstrate that the acceptability of the PRA used in an application is sufficient, for applications that require prior NRC approval, the following information