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 SF, or impose a more restrictive administrative limit if the licensee determines this to be an important factor in reversing the negative trend. 4. Element 4: Submit Proposed Change The evaluations performed to justify the proposed TS changes should be documented, maintained, and included in the license amendment request submittal in accordance with Section C.6 of RG 1.174. Specifically, documentation for risk-informed TS change submittals should include a description or discussion of the following: a. the TS changes being proposed and the reasons for seeking the changes (Regulatory Position C.1, Element 1), b. summary of the engineering analyses conducted to justify the proposed TS changes, and evidence that they meet the principles described in this RG (Regulatory Position C.2, Element 2), c. compliance with current regulations, orders, and license conditions (Regulatory Position C.2.1, Principle 1), d. defense-in-depth evaluation (Regulatory Position C.2.2.1, Principle 2), e. safety margins evaluation (Regulatory Position C.2.2.2, Principle 3), f. risk impact evaluation (Regulatory Positions C.2.3–2.5, Principle 4): (1) acceptability of the PRA models used to evaluate proposed TS changes (Regulatory Positions C.2.3.1, C.2.3.2, and C.2.3.3), (2) changes made to the PRA models used to evaluate proposed TS changes (including data developed and used in addition to the plant’s PRA database) (Regulatory Position C.2.3.3), (3) assumptions of the PRA analysis used to evaluate proposed TS changes (Regulatory Position C.2.3.4), (4) sensitivity and uncertainty analyses performed and associated results (Regulatory Position C.2.3.5), (5) approach used for identifying the dominant risk-significant plant configurations associated with proposed TS changes and identifying these plant configurations; discussion of how these plant configurations will be prohibited (e.g., by TS or plant procedures) during the TS outage; discussion of any compensatory measures proposed as part