Deep Fission Secures LEU from Urenco USA to Fuel Gravity Reactor Demonstrations

A fuel supply agreement between Deep Fission, Inc. and Urenco USA will deliver low-enriched uranium from Urenco’s New Mexico enrichment plant to support testing, demonstration activities, and early commercial operations of Deep Fission’s Gravity reactor, the companies announced in a press release dated Feb 25, 2026, datelined Berkeley, Calif. The deal gives Deep Fission concrete fuel sourcing as it advances a pilot project in Parsons, Kansas, and participates in the U.S. Department of Energy Reactor Pilot Program.

Deep Fission framed the agreement as a milestone for commercialization. Liz Muller, CEO and Co-Founder, said, “Securing fuel is one of the most important steps for any nuclear project,” and “This agreement with Urenco enables us to move quickly toward commercialization and scaling our technology with a high-quality fuel.” The press release and business reprints state the LEU meets all regulatory requirements for use in the United States.

The supply will come from Urenco USA’s New Mexico enrichment plant; some industry reports name the facility as Eunice, New Mexico. Urenco emphasized its role as a domestic supplier: John Kirkpatrick, managing director of Urenco USA, said, “Urenco is pleased to support innovative nuclear companies like Deep Fission.” He added, “Advanced reactor developers are an important part of the future energy landscape,” and “We are focused on ensuring a reliable domestic supply of enriched uranium to support growth in this sector.”

The agreement is explicitly tied to Deep Fission’s participation in the DOE Reactor Pilot Program. World Nuclear News reports that Deep Fission was one of 10 companies selected by DOE in August last year, and WNN notes the program aims to see at least three designs achieve criticality by 4 July 2026. Finance Yahoo’s republished release also references an Other Transaction Agreement with DOE as part of Deep Fission’s path to demonstration.

Project activity on the ground continues in Parsons, Kansas. WNN and industry coverage state Deep Fission broke ground in December at the Great Plains Industrial Park in Parsons, Kansas for a pilot installation, with plans for a full-scale commercial plant to follow after the test reactor demonstration. The Gravity design is described in industry reports as a small modular pressurized water reactor placed in a one-mile (1.6 km) borehole, producing 15 MWe per unit; company materials give scale examples of 10 reactors yielding 150 MWe and 100 reactors producing 1.5 GWe, and say the underground siting provides passive shielding and geological containment while using off-the-shelf parts and readily available LEU fuel.

Commercial context beyond the fuel deal appears in industry reporting: Finance Yahoo and InterestingEngineering cite a reported customer pipeline representing 12.5 GW of future planned power, and InterestingEngineering reports Deep Fission recently announced $80 million in new financing to scale production. The announcement did not disclose contract quantity, delivery schedule, enrichment assay, price, or specific regulatory filings, leaving those operational details for follow-up as Deep Fission moves from pilot testing toward early operations.