Tritium is an isotope of hydrogen with a half-life of 12.3 years. Unlike deuterium, which can be extracted from seawater, tritium does not occur naturally at scale. The world's civilian stockpile stands at roughly 25 kg, produced solely as a by-product of CANDU fission reactors.

This stockpile is limited and decaying, and insufficient to supply a fusion industry. A single 1 GW fusion power plant could consume 55 kg of tritium per year, making in-plant tritium production central to the industry's future. The sector is growing rapidly: over 50 companies have collectively raised almost $15 billion in private capital, with several programmes now targeting grid-connected power in the mid-2030s. The pressure on tritium supply will only intensify.

Tritium breeding blankets, which aim to produce tritium within the machine wall, are the industry's long-term answer, but the technology is still to be demonstrated, and its real-world performance remains uncertain. Even modest shortfalls, multiplied across a growing fleet of plants rolling out simultaneously, pose a major risk to the successful deployment of fusion energy.

StandardX is developing a reliable external source of tritium to support and scale the fusion industry from first-of-a-kind reactors through to global deployment. This includes supply for start-up, operational top-up, and dedicated external supply for early non-breeding systems.

Securing an external tritium supply will determine how fast fusion can scale.