Document: NRC Regulatory Guide
Document ID: db0c5d18-2d27-4720-8935-40b402e52f9a
Document Type: regulatory_guide
Title: Guidance for a Technology-Inclusive, Risk-Informed, and Performance-Based Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light Water Reactors + HISTORY - HISTORY 05/2019 – Issued DG-1353 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1831/ML18312A242.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.233
CFR Part: 
CFR Title: 

Content:
e margins exist between the assessed LBE risks relative to the F-C target, including quantified uncertainties. • Assure that adequate margins exist between the assessed total plant risks relative to the cumulative risk targets. • Assure that design and operational programs reflect appropriate targets for SSC reliability and performance capability for each LBE. • Provide adequate assurance that the risk, reliability, and performance targets will be met and maintained throughout the life of the plant with adequate consideration of sources of significant uncertainties. NEI 18-04 acknowledges that, unlike the plant capabilities for DID, which can be described in physical terms and are amenable to quantitative evaluation, the programmatic DID adequacy is more dependent on the IDP’s engineering judgment. Table 5-6, “Evaluation Considerations for Evaluating Programmatic DID Attributes,” in NEI 18-04 identifies attributes, such as quality and reliability, compensation for uncertainties, and offsite response, and related focus areas for evaluations, possible implementation strategies, and other evaluation considerations. The guidance provides examples of DG-1353, Page 21 programmatic controls associated with licensing-basis documents, such as technical specifications, quality assurance programs, plant procedures and guidelines, training, maintenance programs, and testing and surveillance programs. Risk-Informed and Performance-Based Evaluation of DID Adequacy Section 5.9 in NEI 18-04 summarizes the role of the IDP in evaluating the adequacy of DID. Table 5-8, “Risk-Informed and Performance-Based Decision-Making Attributes,” in NEI 18-04 provides attributes of the integrated decision-making process and principal focus areas for IDP consideration. The attributes include recurring examinations of the risk triplet questions of what can go wrong, how likely it is, and what the consequences are. The IDP should also consider key attributes such as the level of