A Tiny Thorium Heart for Hungry Data Centers

Ampera wants to change how you think about nuclear power. The American startup has shown a prototype of a small thorium reactor module made with 3D printing. The design includes a reactor core and a high pressure vessel, both aimed at factory scale production.

At the center sits a spherical gyroid core made from silicon carbide. This shape gives the reactor a large internal surface area, which helps move heat efficiently. You may know similar structures from advanced liquid cooling blocks, but nuclear engineering makes the idea far more ambitious.
Ampera says the core could work for up to 30 years without refueling.

A Safer Route to Always On Power

The company is developing a subcritical solid state reactor based on thorium and TRISO fuel. In simple terms, the fuel cannot sustain a chain reaction by itself. That design choice helps reduce the risk of runaway power growth.

The first systems should deliver 15 or 30 megawatts of electricity. That is enough for many data centers, especially those feeding artificial intelligence workloads. Ampera also sees demand from defense, industrial and marine users.

The power generation part may arrive in 2027, while complete modules could follow around 2030. Regulators will decide how fast that path moves.

Our View

If Ampera succeeds, you could see data centers become less dependent on crowded power grids. Cheap, compact nuclear modules might support AI growth without forcing cities to compete harder for electricity. The bigger question is trust. Factory built reactors must prove safety, cost and reliability before they leave the prototype stage.

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