Document: NRC Regulatory Guide
Document ID: c7a40fcc-fc9d-4eb2-ad86-f9f5b0f04c82
Document Type: regulatory_guide
Title: Plant-Specific, Risk-Informed Decisionmaking:  Technical Specifications (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1920/ML19206A489.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.177
CFR Part: 
CFR Title: 

Content:
ed in the CRMP is all SSCs modeled in the licensee’s plant PRA, in addition to all SSCs considered high safety significant in accordance with RG 1.160, “Monitoring the Effectiveness of Maintenance at Nuclear Power Plants,” that are not modeled in the PRA. b. The CRMP assessment tool is informed by the PRA and may be in the form of a risk matrix, an online assessment, or a direct PRA assessment. c. The CRMP should be invoked as follows: (1) For preplanned entrance into the plant configuration described by a TS action with a risk-informed CT, a risk assessment, including, at a minimum, a search for risk-significant configurations, should be performed before entering the action. (2) For unplanned entrance into the plant configuration described by a TS action with a risk-informed CT, a similar assessment should be performed in a timeframe defined by the plant’s corrective action program (10 CFR Part 50, Appendix B, “Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants,” Criteria XVI). (3) In the plant configuration described by a TS action with a risk-informed CT, when additional SSCs become inoperable or nonfunctional, a risk assessment, including, at a minimum, a search for risk-significant configurations, should be performed in a timeframe defined by the plant’s corrective action program (10 CFR Part 50, Appendix B, Criteria XVI). d. Tier 2 commitments apply only for planned maintenance but should be evaluated as part of the Tier 3 assessment for unplanned occurrences. DG-1287, Page 20 Component 2: Control and Use of the Configuration Risk Management Program Assessment Tool a. Plant modifications and procedure changes should be monitored, assessed, and dispositioned as follows: (1) Evaluations of changes in plant configuration or PRA model features should be dispositioned by implementing PRA model changes or by the qualitative assessment of the impact of the changes on the CRMP assessment tool. This qualitative assessment