Tritium Inventory & Safety

Tritium is radioactive and regulated, so the on-site amount matters. Kronos's D–³He design keeps its tritium inventory small compared with a D–T plant.

Why it matters

Tritium is radioactive and mobile

D–T plants

Large bred tritium inventory

Kronos

Small inventory — D–³He, no breeding blanket

Managed by

Direct internal recovery + fuel processing

Because tritium is radioactive and chemically mobile, the amount of it held on site is one of the most scrutinized safety and licensing quantities for any fusion plant. A large tritium inventory drives containment requirements, accident analysis, and regulatory burden.

This is another place the Kronos D–³He choice pays off. With no breeding blanket and only a modest, staged tritium role (commissioning and as a ³He precursor), the MetroVolt design keeps its tritium inventory small relative to a D–T plant that must breed and cycle kilograms of it. The direct-internal-recovery fuel loop and processing systems are sized to keep that working inventory tight — an engineering-controlled hazard, honestly accounted for.