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:
a previous licensing decisions. Generally, all such authorizations have an associated PRA configuration control process that is part of the amendment authorizing the use of a PRA. The licensee follows the PRA configuration control process for the approved application. The following archival documentation guidance is associated with the base PRA and they are not affected by any application specific guidance. 4.1 Archival Documentation Archival documentation associated with the base PRA includes the following: • Process to determine acceptability: A detailed description of the process used to determine the acceptability of the PRA is provided. DG-1362, Page 50 • Peer Reviews: The results of the peer review of the base PRA, PRA upgrades, and use of NDMs, and the results of the F&O independent assessment (as discussed in regulatory position C.2.2). A description of the resolution of all the peer reviews (i.e., base PRA, PRA upgrades, and use of NDMs) and F&O independent assessment are included. The results are documented in such a manner that it is clear why each requirement is considered to have been met. This can be done, for example, by providing a reference to the appropriate section of the PRA model documentation. • Base PRA Model: Regulatory position C.1.3 of this guide provides the characteristics and attributes of archival documentation associated with the base PRA. The documentation maintained by the licensee should be legible, retrievable (i.e., traceable), and of sufficient detail that the staff can comprehend the bases supporting the results used in the application to support potential audits and inspections by the NRC staff. • Maintenance and Upgrades: A description of the process for maintenance, upgrade, and use of NDMs is provided. The history is maintained 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