3D-printed thorium reactor

A nuclear tech startup just dropped a headline-grabbing claim: the world's first 3D-printed thorium reactor module, built to power the AI data centers devouring global energy grids. Ampira calls it subcritical, solid-state, and factory-ready, meaning no runaway meltdown risk, no moving parts, and mass production straight off the assembly line.

The reactor doesn't even reach criticality on its own; it needs an external kickstart to begin fission, —a design choice that slashes the chance of catastrophic failure. Behind the scenes, Ampere's CEO Brian Matthews says this reactor isn't just a prototype; it's the foundation for nuclear energy that can be churned out at scale, fast.

The company's targeting a 30-megawatt output, matching the same capacity Valar Atomics is already using to power an Nvidia data center today. But Ampere's pitch goes further.

Their system pairs the reactor with a closed-loop turbine and waste heat recovery, letting customers scale power as needed, then swap in cleaner modules later. Matthews is betting big on markets that can't wait—AI data centers, defense industrial sites, and maritime operations—all racing to cut carbon without sacrificing output.

He's calling this a pivotal shift, the first company to industrialize factory-built nuclear power, with deployment timelines that could arrive sooner than anyone expected. If Ampere delivers, it won't just be a turning point for energy; it could redefine how the world powers the AI revolution, 3D-printed reactor at a time.