Document: NRC Regulatory Guide
Document ID: acab976c-e936-49be-8c59-865767973599
Document Type: regulatory_guide
Title: Guidance for a Technology-Inclusive Content of Application Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light-Water Reactors (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2319/ML23194A194.pdf
Revision Date: 2023-09
Chapter: 
Section ID: RG-1.253
CFR Part: 
CFR Title: 

Content:
e Commission policies. Supporting Risk-Informed Applications of the PRA in Addition to an Initial Licensing Application CP applicants may use the PRA to support risk-informed applications, in addition to implementing the LMP methodology, either concurrently with the CP application, concurrently with the OL application, or after the OL issuance. These additional risk-informed applications may affect the PRA scope, level of detail, or elements that should be considered early during PRA development. Examples of additional risk-informed applications include, but are not limited to: 1. Risk-informed inservice inspection and inservice testing programs. Guidance is provided in DANU-ISG-2022-07, “Risk-Informed Inservice Inspection/Inservice Testing Programs for Non- LWRs” (Ref. B-14). 2. Programs to implement the 2019 Edition of the ASME Boiler and Pressure Vessel Code (ASME Code), Section XI, “Rules for Inservice Inspection of Nuclear Power Plant Components,” Division 2, “Requirements for Reliability and Integrity Management (RIM) Programs for Nuclear Power Plants” (Ref. B-15). Guidance is provided in RG 1.246, “Acceptability of ASME Code, Section XI, Division 2, “Requirements for Reliability and Integrity Management (RIM) Programs for Nuclear Power Plants” (Ref. B-16). 3. Risk-informed technical specifications. Guidance is provided in DANU-ISG-2022-08, “Risk- Informed Technical Specifications” (Ref. B-17). 4. Risk-informed fire protection programs. Guidance is provided in DANU-ISG-2022-09, “Risk- Informed, Performance-Based Fire Protection Program (for Operations)” (Ref. B-18). B.3 PRA Scope B.3.1 A CP applicant using the LMP methodology should determine the following risk metrics: 1. Event sequence family frequencies and consequences, where the consequence is expressed as the dose calculated at the Exclusion Area Boundary (EAB) for the 30-day period following the onset of the release. 2. Three cumulative risk metrics: a. The total mean frequency