The Helium-3 Coproduct
The breeder yields a helium-3 coproduct near 1.97 kg/yr, a strategically valuable material that also feeds the future D-3He burner.
A valuable coproduct
Alongside its tritium-class output, the breeder produces a helium-3 coproduct near 1.97 kg/yr. Helium-3 is scarce and strategically valuable, with uses that make it important beyond its quantity. It is a coproduct of the same neutron economy that breeds tritium.
Where it comes from
Helium-3 arises from the tritium pathway: tritium decays to helium-3, and the fuel cycle can recover it. This links the two products, tritium is the bankable base, and helium-3 accumulates from it, so the fuel loop is designed to recover and account for both.
Why it matters strategically
- Scarcity: terrestrial helium-3 supply is very limited
- Strategic value distinct from revenue, its importance is not simply its mass
- Fuel for the future burner: the D-3He burner (Aegis / MetroVolt) consumes helium-3
The strategic link to the burner
The breeder's helium-3 connects the two machines. The burner is a D-3He generator, and its fuel supply is a long-term constraint gated on lunar helium-3 availability. The breeder's coproduct is one terrestrial source in that picture, though the burner's fleet-scale needs are far larger. Helium-3's value here is framed as strategic, not as a revenue figure.
The 1.97 kg/yr figure is a design projection for a machine not yet built, recovered and confirmed only once the fuel loop operates.