Kaleidos
Factory-built 1 MWe microreactor designed for land, sea or air transport and remote or resilient power.
The annual-energy and household figures are scale illustrations, not project forecasts. Change those assumptions in the reactor output calculator.
Technology snapshot
| Reactor type | High-temperature gas microreactor |
| Coolant / heat transfer | Helium |
| Fuel | TRISO fuel |
| Refueling | Up to 5 years |
| 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? | 1 MWe electrical nameplate in the current design snapshot. |
| Useful heat? | Yes — the design is presented here with heat-use potential. |
| Remote / isolated deployment? | Explicit transportable design attribute. |
| Transportable system? | Yes — vendor design intent includes transportability. |
| Current programme phase? | Testing Testing / pre-commercial |
Programme status
Testing / pre-commercial. Customer deployments targeted from 2028.
DOME / Idaho National Laboratory.
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 →
Radiant states 1 MWe, 1.9 MWt, helium cooling, TRISO fuel and up to five years before refueling. Commercial schedules can change.
Verified 2026-09-21. If the programme has moved since then, use the linked source as the current authority.