U.S. nuclear startup AMPERA has unveiled what it says is the world’s first full-scale, 3D-printed nuclear reactor module, marking a major milestone in its effort to commercialize compact reactors for artificial intelligence data centers and industrial facilities. The prototype is based on a thorium-fueled, subcritical reactor design and is intended to deliver between 15 MW and 30 MW of electrical power – enough to supply a medium-sized AI data center.
Unlike conventional nuclear reactors, AMPERA’s system is designed to operate in a subcritical state, meaning it cannot sustain a nuclear chain reaction on its own. Instead, it relies on an external neutron source to maintain fission. If that neutron source is switched off, the reaction stops automatically, a design the company says significantly improves operational safety by reducing the risk of a runaway reaction or core meltdown.
The reactor module itself has been manufactured using advanced 3D printing techniques, with a silicon carbide core designed for a service life of up to 30 years without refueling. AMPERA says factory production could dramatically reduce construction costs and deployment times compared with traditional nuclear power plants, allowing modules to be mass-produced and transported directly to customer sites.
The company is targeting one of the fastest-growing energy markets: AI infrastructure. As hyperscale data centers consume ever-larger amounts of electricity, technology companies are increasingly searching for reliable carbon-free power sources that can operate around the clock. AMPERA believes compact nuclear reactors could provide dedicated energy for AI campuses, defense facilities, industrial operations, and maritime applications without depending on strained electrical grids.
Although the reactor module has now been completed, the system has not yet begun generating electricity. Commercial deployment remains subject to further testing, regulatory approval, and licensing before the technology can move into large-scale production. Even so, the unveiling represents an important engineering milestone in the growing race to develop next-generation nuclear technologies capable of supporting the massive energy demands created by artificial intelligence.
The announcement comes as interest in small modular reactors and advanced nuclear technologies continues to accelerate worldwide. With AI companies investing hundreds of billions of dollars into new computing infrastructure, reliable power generation has become one of the industry’s biggest bottlenecks. AMPERA hopes its factory-built thorium reactors can eventually become a scalable solution for supplying clean, continuous electricity to the next generation of AI data centers.
