Hyperion is sized so its on-site tritium inventory stays inside the envelope of existing civil licensing practice. That is a design constraint applied from the start, not a hope pinned on after the physics.
Tritium inventory is the defining radiological source term of a D-T machine. By sizing Hyperion to a requirement rather than a maximum, and by moving bred tritium into product rather than accumulating it, the design keeps the standing inventory bounded within practiced limits.
Licensing timeline is often the real critical path for a fusion first-of-a-kind. A machine whose inventory sits inside existing practice starts that conversation from precedent, which is a schedule asset as much as a safety one.
| Source term | on-site tritium inventory |
| Posture | inside civil licensing practice |
| Mechanism | requirement-sized, product-flushed |
| Benefit | licensing by precedent |
| Design stage | constraint applied from the start |