Sovereign Tritium Supply
Tritium is scarce, decays continuously, and has essential uses; domestic breeding is a route to a sovereign, replenishable supply.
A decaying, scarce material
Tritium is a radioactive isotope of hydrogen with a half-life of about 12.3 years, so any stockpile shrinks continuously and must be replenished. It has no large natural source and is expensive to produce, which makes existing supply thin and strategically sensitive. A domestic, renewable production route is therefore a sovereignty capability.
The breeder (Hyperion) breeds tritium by capturing fusion neutrons in a lithium blanket. Its design output is in the ~4 kg/yr class, with the tritium breeding ratio treated as a design lever across 1.1, 1.5, and 1.8. A ratio above 1 means the machine can, in principle, breed more than it consumes, enabling a net supply, though this is a design target under study, not a demonstrated result.
Why the ratio is a lever, not a promise
Breeding ratio depends on blanket design, neutron economy, and losses that are still being characterized in simulation. Kronos treats it as a range precisely to avoid overclaiming. The honest reconciliation between local and net breeding is an open item flagged in the technical program.
- Tritium half-life ~12.3 yr: stock decays and needs replenishment
- No large natural source; existing supply is thin
- Breeder output ~4 kg/yr class; TBR lever 1.1/1.5/1.8
- Ratio is a design target under study, not demonstrated
Tritium also carries strict handling and accounting requirements because it is a mobile radioactive gas. A sovereign supply therefore implies sovereign stewardship: extraction, storage in getter beds, inventory accounting, and containment, all addressed in the safety and isotopes sections. Producing the material domestically only delivers sovereignty if the handling infrastructure is domestic and robust as well, which is part of the breeder program's scope.
Design-and-simulation stage; first tritium at the first-of-a-kind unit is targeted around 2030.