Microreactors
Compare compact designs aimed at remote power, resilience, industrial heat and transportable deployment.
What matters when comparing microreactors
Microreactors are mainly differentiated by electrical scale, how the heat leaves the core, fuel form, refueling interval and whether the complete system is designed to be transported. In this curated set, the gap between 1 MWe and 5 MWe is already a five-fold change in electrical output.
A transportable design can be shipped between sites; that is different from operating while in transit.
Small output can fit isolated loads where a gigawatt-scale unit would be physically and electrically inappropriate.
Both current microreactors in this dataset also target useful heat, not electricity alone.
Background: U.S. DOE microreactor explainer. Reactor-specific claims below come from the source linked on each profile.
Compare the designs on the fields that actually differ.
This is a curated comparison, not a claim that the list is exhaustive.
| Design | MWe | Technology | Fuel | Heat | Transportable | Programme status |
|---|---|---|---|---|---|---|
| Kaleidos Radiant | 1 | High-temperature gas microreactor | TRISO fuel | Yes | Yes | Testing Testing / pre-commercial |
| eVinci Westinghouse | 5 | Heat-pipe microreactor | TRISO fuel | Yes | Yes | Testing Development / criticality testing milestone |
Source, status and project context for each design.
Kaleidos
Factory-built 1 MWe microreactor designed for land, sea or air transport and remote or resilient power.
Testing / pre-commercialMicroreactoreVinci
Transportable microreactor aimed at remote sites, data centers, industrial heat and resilient power.
Development / criticality testing milestoneData snapshot verified against primary or authoritative sources: 21 September 2026. Reactor programmes and deployment schedules can change.