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:
Project Methodology B.1 Introduction This appendix provides supplemental guidance on one approach that is acceptable to the U.S. Nuclear Regulatory Commission (NRC) staff for preparing a probabilistic risk assessment (PRA) for a non-light-water reactor (non-LWR) construction permit (CP) application under Title 10 of the Code of Federal Regulations (10 CFR) Part 50, “Domestic Licensing of Production and Utilization Facilities” (Ref. B-1), based on the Licensing Modernization Project (LMP) methodology in Nuclear Energy Institute (NEI) report NEI 18-04, Revision 1, “Risk-Informed Performance-Based Guidance for Non- Light-Water Reactor Licensing Basis Development” (Ref. B-2). The NRC staff developed this guidance with the goal of informing all stakeholders, including applicants, of the type and detail of PRA information to be included in a non-LWR CP application that would be sufficient to provide confidence in the PRA results such that the PRA can be used in regulatory decision making. Fundamentally, the application should demonstrate that: • Commensurate with the preliminary plant design and proposed site described in the CP application, information developed from the PRA is sound and reliable. • The PRA produces insights with appropriate fidelity to support implementation of the LMP methodology and development of the CP application. • The CP applicant has defined processes and procedures to adequately maintain and upgrade the PRA to support continued implementation of the LMP methodology as the detailed plant design evolves and the plant is constructed, leading to submittal of the operating license (OL) application. The term “PRA acceptability” describes the ability of a PRA to support risk-informed regulatory decision making and is defined in terms of meeting the NRC regulatory positions in Section C of Regulatory Guide (RG) 1.247 (for trial use), “Acceptability of Probabilistic Risk Assessment Results for Non-Light-Water Reactor Risk-Informed