Accelerating Demand for Advanced Reactor Fuel
The commercial viability of next-generation nuclear power is being solidified through a series of strategic fuel procurement agreements. Small modular reactors (SMRs) and microreactors require uranium enriched between 5% and 20%, classified as High-Assay Low-Enriched Uranium (HALEU). Recently, Centrus Energy has signed multiple multi-year definitive HALEU and LEU supply agreements with leading reactor developers, proving that the demand for this specialized fuel is both real and rapidly accelerating.
Key Supply Contracts Announced
In August 2026, Centrus Energy signed a large-scale commercial HALEU supply agreement with advanced reactor developer X-energy. Shortly after, on September 17, 2026, Centrus announced a multi-year definitive HALEU supply agreement with SMR developer Antares Nuclear. Supply for Antares is scheduled to begin before 2030, with the developer making advance payments to support domestic capacity expansion. Similarly, on September 9, 2026, Centrus secured a long-term HALEU supply deal with Radiant for its 'Kaleidos' microreactor.
Unobligated Domestic Uranium
The recent contracts with Antares and Radiant specifically involve 'unobligated' uranium produced entirely within the United States, without the use of foreign equipment or materials, ensuring strict compliance with domestic energy security mandates.
However, not all fuel procurement strategies are fully finalized. Oklo's fuel availability remains a point of market scrutiny, as its arrangement with Centrus for HALEU currently remains a letter of intent (LOI) rather than a definitive agreement. Despite this, the massive influx of definitive contracts has pushed Centrus's total enrichment backlog to $3.0 billion. These agreements highlight a critical shift in the nuclear industry, where securing domestic HALEU supply is now a primary prerequisite for advanced reactor deployment.
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