The NRC is modernizing nrc.gov with an updated design and improved navigation to enhance usability. We are committed to a smooth transition and will work to minimize any disruption. The site may be briefly unavailable at times during launch. Thank you for your patience.
Our Goal
To ensure the NRC is ready to effectively and efficiently review and regulate non-Light Water Reactors (non-LWRS).
Integrated
Review Schedule
Spotlight
Risk-Informed and Performance-Based Guidance for Non-LWR Licensing Basis Development
On this page:
Publication of Regulatory Guide 1.233
As an outcome of the Licensing Modernization Project (LMP), the NRC published Regulatory Guide 1.233, "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," in the Federal Register on June 9, 2020. This regulatory guide endorsed the methodology described in NEI 18-04, Revision 1, "Risk-Informed Performance-Based Guidance for Non-Light Water Reactor Licensing Basis Development," as an acceptable approach for informing the licensing basis and determining the appropriate scope and level of detail for parts of applications for licenses, certifications, and approvals for non-LWRs. See SECY-19-0117, "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," and associated Staff Requirements Memorandum for information on associated policy issues.
Pilot Project Reports
The following reports are related to LMP pilot activities.
Date | Design |
|---|---|
Fluoride-Cooled High Temperature Reactor Licensing Modernization Project Demonstration | |
Molten Salt Reactor Experiment (MSRE) Case Study Using Risk-Informed, Performance-Based Technical Guidance to Inform Future Licensing for Advanced Non-Light Water Reactors | |
Westinghouse eVinci Micro Reactor | |
PRISM Sodium Fast Reactor | |
OKLO's DG-1353 Pilot | |
High Temperature, Gas-Cooled Pebble Bed Reactor |
Page Last Reviewed/Updated Tuesday, September 08, 2026
Page Last Reviewed/Updated Tuesday, September 08, 2026