He-3 Demand Gate
A commercial burner unit demands roughly 400x the domestic helium-3 supply, so it is gated on a fuel that does not exist at terrestrial scale.
This is the third honest gate, and it is about fuel, not the machine's internals. The burner burns helium-3, which is extraordinarily scarce on Earth. A single commercial-class unit would demand on the order of 400 times the domestic helium-3 supply. There is no terrestrial helium-3 source that can feed even one commercial burner, let alone a fleet.
This is why the burner cannot be read in isolation from the rest of Kronos. It is the reason the breeder (Hyperion) matters — it produces helium-3 as a product — and the reason lunar helium-3 is part of the long-term story. The burner is gated on a fuel supply that must be created, either bred or mined, before commercial operation is possible.
Why the fuel is scarce
- Helium-3 is present only in trace amounts on Earth
- Existing supply comes largely from tritium decay
- One commercial burner would need ~400× that supply
- No mined terrestrial source approaches this scale
- The gap is why breeding and lunar sourcing are pursued
How the gate could close
Two paths, both external to the machine. The breeder (Hyperion) produces helium-3 as part of its product stream, so a breeder fleet could feed a burner fleet over time. And lunar regolith holds helium-3 that could, in principle, be mined and returned. Both are long-horizon programs. Until one delivers at scale, the burner remains fuel-gated — a fully honest statement made with no economic figures attached.
All figures are design-and-simulation values for a machine not yet built.