Raised
Private and public equity. Never added to federal money.
TerraPower
Lead developer of the Natrium demonstration project at Kemmerer, Wyoming.
Deployment stage6 / 8Physical
Race position
Megawatts at their strongest documented state, as of 2026-08-06.
DesignNatrium
Per unit345 MWe
LaneGrid-scale SMR
ListingPrivate
Up to 500 MWe for 5+ hours with the molten-salt storage boost.
Nuclear construction · 345 MWe
One gigawatt is 3 × 345 MWe units. 345 MWe rest on an executed action, 35% of the way there.
Why this company is on the board: NRC construction permit issued for Kemmerer Unit 1 and construction underway in Wyoming. Source ↗
Funding
Three frames, never added together.
Awarded
Federal awards and cost share. A ceiling, not cash received.
- Date not statedUp to $2B DOE ceiling, 50% of project costsCost share · DOE Advanced Reactor Demonstration ProgramSource ↗
Borrowed
Debt, repayable. Never counted as a raise, federal or private.
No borrowed money on record.
Filed, not raised
A registration filed with the SEC. The filing itself raises nothing.
No filed, not raised money on record.
Cash on hand
A balance, not a raise. Reported by the company at a stated date.
No reported cash position on record.
Licensing
Applications, permits and authorizations, naming the authority in each case.
- 2026-03NRC issued construction permit CPAR-1, the first for a commercial-scale Gen IV reactor and the first non-light-water permit in over 40 yearsPermit / authorization · Company-reportedSource ↗
Physical progress
Work at a site. Criticalities are proof the physics works, not electricity.
- 2026-04Nuclear construction began at Kemmerer with about 1,600 workers mobilizedConstruction start · Company-reportedSource ↗
Program selections and agreements
Being chosen for a program, or signing one. Neither is a permit nor work at a site.
Nothing on record in this lane as of 2026-08-06.
Design proof outside the U.S.
Real progress on the same design abroad. Contributes 0 MWe to the U.S. race.
Nothing on record in this lane as of 2026-08-06.
Pipeline
Executed first. Announcements are labeled as announcements and never added to them.
Backed by an executed action
- 2026-04345 MWe · Nuclear constructionKemmerer Unit 1, Wyoming · permit issued 2026-03, construction started 2026-04-23 · Company-reportedSource ↗
Announced, non-binding
Company-stated targets
What the company says, printed beside what a regulator has documented. The site never averages a target into a prediction.
- Stated 2026-03First Natrium plant completed in 2030Documented state today: Nuclear construction · 345 MWe · Company-reportedConflicting account: Coverage of the same permit frames the plant's NRC-told schedule as early 2031, a five to seven year slip from DOE's original target. Source ↗Target source ↗
TechnologySodium-cooled fast reactor
Reactor classesGen IV · Large reactor / Gen IV · Test reactor
Tracked projects2
Highest deployment stage6 · Physical
Primary sourceNRC TerraPower record ↗
Projects and next steps
2 trackedKemmerer, Wyoming
Natrium · Kemmerer Unit 1
CurrentNRC issued construction permit CPAR-1; DOE later reported groundbreaking for the nuclear island.
Next stepSubmit and secure the separate NRC operating license before fuel loading or operation.Idaho National LaboratoryMolten Chloride Reactor Experiment
CurrentINL produced the first of an expected 72–75 fuel-salt batches required for criticality.
Next stepComplete fuel production, install the experiment in LOTUS, obtain authorization, and begin the planned test campaign.