In December 2022, TerraPower announced that its 345-megawatt Natrium demonstration project in Wyoming would be delayed by at least two years because sufficient HALEU would not be available on schedule. Nearly four years later, that decision remains the clearest illustration of a simple rule in advanced nuclear: fuel timing sets reactor timing.

Demand is now anchored by creditworthy buyers

What has changed since is who is standing behind the demand. In October 2024, Google agreed to purchase electricity from Kairos Power reactors totaling up to 500 megawatts — a hyperscaler underwriting a first-of-a-kind HALEU-fueled fleet rather than a single pilot. Amazon separately invested in X-energy, supporting a development target of more than 5 gigawatts of advanced reactor capacity by 2039, a pipeline that underpins sustained HALEU and TRISO-X fuel demand.

For fuel suppliers, the significance is not the headline megawatts but the shape of the order book: data-center load is flat, contracted and financeable, which makes offtake-backed reactor projects far easier to stack behind enrichment capacity.

Conditional allocations as a scheduling tool

Fifteen companies requested HALEU from the Department of Energy, and eight developers received conditional allocations during 2025. Recipients included TRISO-X, TerraPower, Kairos Power, Radiant Industries and Westinghouse. Allocation, in effect, has become a scheduling mechanism — the developers that hold conditional DOE volumes can sequence construction and fuel qualification, while those without must wait for commercial supply.

The bottleneck runs upstream

US enrichment capacity remains the binding constraint. Centrus Energy's Piketon plant is the only US facility licensed to produce HALEU, and its cumulative deliveries to DOE through June 2025 stood at 900 kilograms against projected requirements of more than 40 tonnes before 2030.

Until that gap closes, expect reactor announcements to be paced by fuel contracts rather than by turbine orders — and expect developers to keep building fuel-security clauses directly into their schedules.

This article was assisted by AI analysis. Please refer to the original source for official information.