Natrium
345 MWe sodium fast reactor paired with molten-salt energy storage that can raise output to about 500 MWe.
The annual-energy and household figures are scale illustrations, not project forecasts. Change those assumptions in the reactor output calculator.
Technology snapshot
| Reactor type | Sodium-cooled fast reactor + thermal storage |
| Coolant / heat transfer | Liquid sodium |
| Fuel | HALEU metallic fuel |
| Refueling | Project-specific |
| Region / market | United States |
What do these attributes mean for common use cases?
This is an attribute check, not a project recommendation. Site, grid, licensing, fuel, security and economics still need project-specific analysis.
| Common question | What this design data says |
|---|---|
| Grid electricity? | 345 MWe electrical nameplate in the current design snapshot. |
| Useful heat? | Yes — the design is presented here with heat-use potential. |
| Remote / isolated deployment? | Not a primary small/remote scale signal. |
| Transportable system? | No — this profile treats it as a fixed-site design. |
| Current programme phase? | Under construction Under construction |
Programme status
Under construction. First plant in Wyoming.
Kemmerer, Wyoming.
Closest designs by electrical output
These are the three nearest entries in the Nuclear Planner dataset on a ratio-based MWe scale. They are not claimed to be technical substitutes.
Source and verification
Primary / authoritative source used for this snapshot →
TerraPower lists 345 MWe base output and 840 MWt; storage can raise electrical output for several hours.
Verified 2026-09-21. If the programme has moved since then, use the linked source as the current authority.