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KRONOS FUSION ENERGYWHITEPAPER 011 / 104
Hyperion — The Breeder
Hyperion breeder · design render
Hyperion breeder · design render · © 2026 KFE

Sized to the Requirement: Tritium at 1.87-4.0 kg/yr

Tritium self-sufficiency operating window — OpenMC.
Tritium self-sufficiency operating window — OpenMC. canon 2026-08-27 · © 2026 KFE
Hyperion is built to a stated national tritium need, not to whatever a physics optimum happens to yield.

Hyperion's tritium output is specified as a range, 1.87 to 4.0 kg per year, sized to the customer's requirement rather than to a physics maximum. Designing to a requirement is a different discipline from designing to a peak.

The science

Because breeding ratio is a lever, tritium yield can be dialed to a target. Hyperion spans 1.87-4.0 kg/yr by choice, matching the machine to the national requirement instead of chasing the largest number the plasma could produce.

Why it matters

A requirement-sized machine is a smaller, cheaper, more licensable machine than a maximised one. It also means the tritium inventory on site stays inside existing civil licensing practice, which is a schedule advantage, not just a safety one.

The numbers

Tritium output1.87-4.0 kg/yr
Sizing basisnational requirement, not optimum
Adjustable viabreeding-ratio lever
Inventory postureinside civil licensing practice
Primary streamtritium
Straight answersThe output band is a design choice against a stated requirement; the specific contracted figure is a commercial matter kept out of the public record. The physics that makes the band achievable is deposited.
Kronos is the fusion company that shows its work. Every figure here traces to the openly deposited Kronos simulation programme and design-point records (CC BY 4.0). Read the series, run the code, check us. — All whitepapers · Read the formal papers & open data
Building toward first construction in 2027 — isotopes first, electricity next. Quantitative values are simulation-derived and carry the feasibility gates named in the text; superseded values are kept in the record with era labels. This document is informational and is not an offer of securities. © 2026 Kronos Fusion Energy, Inc. · Los Angeles, California.
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