The 85.0 MW Fusion Power

The 85.0 MW fusion power sets the neutron production rate that drives breeding, activation, and the helium-3 coproduct.

Power as a neutron budget

In a D-T plasma each fusion reaction releases 17.6 MeV, split roughly 14.1 MeV to the neutron and 3.5 MeV to the alpha particle. The 85.0 MW fusion power of Hyperion therefore corresponds to a fixed rate of 14 MeV neutron production — the currency the foundry spends. Roughly four-fifths of the fusion energy leaves as neutrons; those neutrons are the product stream.

From that neutron budget the design derives its output classes: a tritium class output near 4 kg/yr, a helium-3 coproduct near 1.97 kg/yr from tritium decay, and 14 MeV neutrons available for materials irradiation and isotope services. Every product number traces back to this power figure and the breeding blanket that captures the neutrons.

Why not simply build bigger

A larger machine would produce more neutrons but would also raise the physics and engineering bar of the first build. Hyperion is sized to a supply requirement, not to a megawatt headline. 85.0 MW is chosen because it delivers the target throughput at a compact scale that keeps the first-of-a-kind tractable. Because the neutron rate scales with fusion power, the product yields and the fusion power are locked together: the same figure that names the machine's output also fixes how fast it can breed tritium and generate its coproducts.

• ~80% of fusion energy carried by 14 MeV neutrons
• Neutron rate sets breeding, activation, and coproduct yields
• Sized to isotope supply, not to an electrical rating

This page describes a design-and-simulation study, not a built machine. Construction begins Q2 2027; first-of-a-kind first tritium is targeted near 2030. No hardware net-gain is claimed before FOAK.