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Pre-Application Activities for Advanced Reactors

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Below is a summary of all Advanced Reactor (non-LWR and LWR) applicants, vendors, and research/test reactors that have notified the NRC of their intent to engage, along with a history of those interactions.

The table of contents is arranged by technology and is linked to each applicant or vendors pre-application page.

The NRC guidance for these pre-application engagements is found in Appendix A of the Interim Staff Guidance DANU-ISG-2022-05, “Review of Risk-Informed, Technology-Inclusive Advanced Reactor Applications—Roadmap.” While this guidance focuses on non-light water reactor technologies, the document, especially the environmental sections, generally applies to all reactor technologies.

To be considered active, a vendor or applicant must either submit a Regulatory Engagement Plan (REP) or show a substantial history of pre-application interactions with the NRC. If no project activity (e.g., interactions with the NRC, updates to REPs, etc.) occurs for one year, the project will be deemed inactive.

Energy Northwest

General Atomics

General Atomics-Electromagnetic Systems

Radiant Industries, Inc

Terra Innovatum

University of Illinois at Urbana-Champaign - NANO Nuclear Energy Inc.

X-Energy, LLC

X-Energy, LLC

Light Water Reactors

Deep Fission

Vendor: GE-Hitachi Nuclear Energy (GEH)

Hadron Energy, Inc.

Last Energy

REPLOY Power, Inc.

Rolls-Royce SMR Limited

Vendor: SMR, LLC (A Holtec International Company)

Westinghouse Electric Company

Molten Salt Reactors / Molten Chloride Fast Reactors

Abilene Christian University

Kairos Power LLC

Natura Resources, LLC

TerraPower, LLC

Terrestrial Energy USA Inc

Sodium Cooled Reactors

Aalo Atomics – Idaho Nuclear Project

ARC Clean Technology

Oklo Inc.

TerraPower, LLC and GE Hitachi

Other Designs

Antares Nuclear, Inc.

Appalachian Power Company

Blue Energy, Inc.

Duke Energy

Japan Atomic Energy Agency (JAEA)

Shepherd Power

Texas A&M University

Westinghouse Electric Company

Page Last Reviewed/Updated Wednesday, August 20, 2025

Page Last Reviewed/Updated Wednesday, August 20, 2025