Project locations

Named U.S. reactor sites organized by region, developer, and deployment stage.

West

11 projects

Stage 6

Natrium · Kemmerer Unit 1

TerraPower / US SFR Owner

Kemmerer, Wyoming

Construction permitted

Next stepSubmit and secure the separate NRC operating license before fuel loading or operation Stage 6

Project Pele

U.S. Department of Defense / BWXT

Idaho National Laboratory

Prototype construction

Next stepDeliver the reactor module, complete safety review, assemble, fuel, and begin testing Stage 3

Kaleidos · DOME test

Radiant Industries / NRIC

Idaho National Laboratory

Conditional test slot

Next stepSatisfy readiness gates, complete authorization, install the experiment, and conduct testing Stage 7

Ward 250 critical experiment

Valar Atomics

Emery County, Utah

Initial criticality achieved

Next stepTranslate test results into a powered design, licensing basis, customer project, and repeatable delivery plan Stage 7

Aalo Critical Test Reactor

Aalo Atomics

Idaho National Laboratory

Initial criticality achieved

Next stepBuild, license, fuel, and operate the separate 10 MWe Project Ascension reactor before claiming power deployment Stage 7

Antares R1 Mark-0

Antares Nuclear

Idaho National Laboratory

Initial criticality achieved

Next stepComplete further testing and establish the NRC licensing and customer pathway for a power-producing reactor Stage 3

Aurora pilot reactor

Oklo

Idaho National Laboratory

DOE pilot development

Next stepComplete DOE authorization, site work, construction, fuel readiness, and critical testing Stage 3

Kaleidos + RiPPer pilot

Radiant Industries

Idaho National Laboratory

DOE pilot development

Next stepComplete DOE authorization and readiness gates for construction, fuel loading, and critical testing Stage 7

Unity critical experiment

Deployable Energy

Idaho National Laboratory

Initial criticality achieved

Next stepTranslate the experiment into a licensed power design, customer project, fuel plan, and repeatable commercial delivery process Stage 3

eVinci DOME experiment

Westinghouse

Idaho National Laboratory

Conditional DOME selection

Next stepComplete DOE authorization, experiment fabrication, fuel readiness, and DOME scheduling Stage 6

Molten Chloride Reactor Experiment

Southern Company / TerraPower / Idaho National Laboratory

Idaho National Laboratory

Fuel production underway

Next stepComplete fuel production, install the experiment in LOTUS, obtain authorization, and begin the planned test campaign

Midwest

3 projects

Stage 3

Pioneer Units 1 & 2 · SMR-300

Palisades SMR / Holtec International

Covert, Michigan

Phased permit review

Next stepObtain the limited-work authorization and complete the remaining construction-permit application and reviews Stage 3

UIUC · KRONOS MMR

University of Illinois / NANO Nuclear Energy

Champaign County, Illinois

Construction-permit application

Next stepPass NRC acceptance and technical review, then obtain a construction permit Stage 4

Nebraska Gen III+ SMR siting

Nebraska Public Power District

Nebraska; site not yet public

Federal siting award selected

Next stepName the site and design, execute the award, and submit a complete NRC early site permit application

South

11 projects

Stage 6

Hermes 2

Kairos Power

Oak Ridge, Tennessee

Construction underway

Next stepComplete nuclear construction, request operating licenses, then load fuel and test Stage 3

Long Mott · Xe-100

Long Mott Energy / X-energy / Dow

Calhoun County, Texas

License review

Next stepComplete the safety review and obtain a construction permit; operation requires a later license Stage 3

Groves pilot reactor

Atomic Alchemy

Caldwell County, Texas

DOE pilot development

Next stepComplete the DOE safety basis, authorization, construction, and fuel-readiness gates before operation Stage 3

PWR-5 pilot reactor

Last Energy

Texas A&M RELLIS Campus, Texas

DOE pilot development

Next stepComplete site authorization, safety analysis, construction, and operating readiness under DOE oversight Stage 3

Pluto pilot reactor

Oklo

Savannah River Site, South Carolina

DOE pilot development

Next stepComplete DOE authorization, fuel-facility integration, construction, and critical-test readiness Stage 3

Natura pilot · ACU

Natura Resources / Abilene Christian University

Abilene Christian University, Texas

DOE pilot development

Next stepComplete the DOE authorization basis, site work, construction, fuel loading, and operating readiness Stage 3

TETRA-1 pilot reactor

Terrestrial Energy

Texas A&M RELLIS Campus, Texas

DOE pilot development

Next stepComplete DOE authorization, site work, fuel preparation, construction, and critical-test readiness Stage 2

RELLIS advanced-reactor site

Texas A&M University System

Bryan, Texas

NRC pre-application engagement

Next stepSelect the site envelope and reactor assumptions, then submit a complete early site permit application Stage 3

Clinch River · BWRX-300

Tennessee Valley Authority / GE Vernova Hitachi

Oak Ridge, Tennessee

Construction-permit review

Next stepComplete NRC safety review and obtain the construction permit before nuclear construction Stage 3

Belews Creek early site permit

Duke Energy

Stokes County, North Carolina

Early site permit review

Next stepComplete NRC safety and environmental reviews and obtain the early site permit Stage 8

Vogtle Units 3 & 4

Georgia Power / Southern Nuclear / Westinghouse

Waynesboro, Georgia

Two repeat units in commercial operation

Next stepTranslate the completed two-unit delivery into repeat AP1000 orders with demonstrated cost and schedule learning

Northeast

2 projects

Stage 4

New York Gen III+ SMR siting

Constellation SMR Development

New York; site not yet public

Federal siting award selected

Next stepName the site and design, execute the award, and submit a complete NRC early site permit application Stage 5

Crane Clean Energy Center restart

Constellation Energy

Londonderry Township, Pennsylvania

Finance closed; licensing active

Next stepComplete NRC licensing actions, restore plant systems, pass restart inspections, and receive approval to resume power operations

Undisclosed

1 project

Stage 3

Deep Fission DBR pilot

Deep Fission

Site not disclosed by DOE

DOE pilot development

Next stepDisclose and authorize a site, complete the safety basis, and demonstrate construction and fuel readiness

Global comparison planned

BuildReactors under construction by country, technology origin, and first-power date

ProveAdvanced demonstrations that reached criticality, first electricity, or full power

ExportU.S. technology agreements tied to a site, license, finance, or signed order

Publication requires comparable country-level primary sources.