Florida Startup Unveils Full-Scale 3D-Printed Nuclear Reactor Module

Florida-based startup Ampera has unveiled what it claims is the world’s first full-scale, 3D-printed nuclear reactor module, featuring a silicon carbide core and pressure vessel. The reactor utilizes additive manufacturing to create complex internal geometries, such as a gyroid lattice, that are impossible to produce through traditional machining. This development represents a significant milestone for the additive manufacturing sector, demonstrating the technology's potential to enable next-generation energy solutions through advanced materials and design freedom.

Ampera’s reactor module centers on a 2-meter spherical core fabricated from silicon carbide, a ceramic material capable of withstanding extreme temperatures up to 3000°C. The core features an intricate internal gyroid lattice with 2-millimeter channels, a design that necessitates layer-by-layer 3D printing. These components are produced using proprietary equipment developed by Ampera’s sister company, Additec. By leveraging additive manufacturing, the company aims to bypass the limitations of conventional machining to create highly efficient, heat-resistant structures for nuclear applications.

The system operates on subcritical physics, meaning it cannot maintain a self-sustaining chain reaction and instead relies on external neutron generators to drive fission. This "throttle" mechanism allows the reactor to be shut down almost instantly by cutting the neutron supply, effectively eliminating traditional meltdown risks and operational delays like xenon poisoning. The reactor is fueled by thorium embedded in TRISO particles and is designed to remain sealed for up to 30 years without refueling. Each modular unit is sized to fit within a standard 40-foot shipping container, providing approximately 15 MW of electricity.

Ampera is targeting the rapidly growing AI data center market, offering flexible, on-demand power through leased units and power purchase agreements. The company has secured significant backing from investors such as Super Micro Computer, which holds an 11% stake, and Scorpio Tankers. While the unveiling of the full-scale module marks a manufacturing breakthrough, the technology remains in the pre-operational phase. Ampera is currently working toward regulatory approval with a prototype timeline extending to 2029, as the reactor has yet to be loaded with fuel or generate electricity.