Microreactors

Nuclear reactors smaller than a semi truck to be tested in Idaho

Forget small modular reactors. Microreactors are the new hotness

Earlier this month, the DoE conditionally selected Westinghouse's
trailer-sized eVinci test reactor and Radiant's Kaleidos unit to
conduct the first fueled microreactor experiments at its Demonstration
of Microreactor Experiments (DOME) facility at Idaho National
Laboratory.

These experimental units are really, really small compared to other
reactors, with self-contained designs from both companies no larger
than a semi-truck trailer. The DOME project considers anything under
50 MW of power to be a microreactor; the eVinci is designed to only
produce 5 megawatts, and the Kaleidos is limited to just 1.2 megawatts
of electrical power output.

For perspective, the average US home only consumes around 30 kWh of
electricity per day - so even 1.2 MW is enough for a lot of homes.

https://www.theregister.com/2025/07/07/trailer_sized_microreactors