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The U.S. Nuclear Regulatory Commission is in the process of rescinding or revising guidance and policies posted on this webpage in accordance with Executive Order 14151 Ending Radical and Wasteful Government DEI Programs and Preferencing, and Executive Order 14168 Defending Women From Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. In the interim, any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.

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#NRCAdvRxReady

The NRC's strategic transformation and modernization enables the safe deployment of Advanced Reactors

Long Mott Generating Station Construction Permit Application

On March 31, 2025, Long Mott Energy, LLC submitted a construction permit application that would demonstrate the X-Energy high-temperature gas-cooled reactor technology in Calhoun County, Texas

Application Status

TerraPower Natrium – SFR

On March 28, 2024, TerraPower submitted a Construction Permit Application for their proposed Natrium Sodium Fast Reactor near Kemmerer, Wyoming

Application Status

Optimizing the Regulatory Framework for Factory-Fabricated Micro-Reactors

SECY-24-0008 - Micro-Reactor Licensing and Deployment Considerations: Fuel Loading and Operational Testing at a Factory

Read The Paper Now

US NRC – Canadian Nuclear Safety Commission – United Kingdom Office of Nuclear Regulation MOC

The three agencies signed a memorandum of cooperation to increase regulatory cooperation

Information on MOC

Modernizing Regulations: 10 CFR Part 53

Part 53 shifts regulatory requirements to be modern and technology-inclusive. Essential for advanced reactors.

Learn More About 10 CFR Part 53

Advanced Reactors

The NRC refers to non-light water reactor (non-LWR) designs and small modular light water reactors (SMRs) as advanced reactors. These reactors incorporate innovative technologies compared to existing operating reactors, such as passive safety features, alternative fuel or coolant types, or smaller reactor sizes. While non-LWRs use distinct technologies and materials, SMRs are a subset of light water reactors that are designed to be more compact, scalable, and potentially safer, with many sharing features like passive safety systems and advanced engineering designs.

How We’re Executing

Regulatory Activities Integrated Schedule • Project Status and Dashboards
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Who We're Working With

Applicants • Pre-Applicants • International Partners
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Prospective Applicant Guide

General Information • Guidance • Project Information

Modernizing How We Regulate

Rulemaking • Guidance • Policy
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Get Involved

Meetings • Engagement
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References & Training

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Related Information

Fusion Energy Systems

Fuel Cycle

Page Last Reviewed/Updated Tuesday, March 04, 2025