TRISO-X, LLC, a wholly-owned subsidiary of X-Energy, Inc. (NASDAQ: XE), announced the completion of vertical construction at its TX-1 advanced nuclear fuel fabrication facility in Oak Ridge, Tennessee, on Sept. 24, 2026.

The milestone completes the primary building structure of the 214,000-square-foot facility. Construction activity will now shift to interior buildout, installation of fuel fabrication equipment, and construction of supporting facilities. Clark Construction Group continues as the construction contractor.

"Completing vertical construction is a major milestone for TX-1 and another tangible demonstration of the progress our team is making in Oak Ridge," said Joel Duling, President of TRISO-X.

Once operational, TX-1 is expected to produce approximately 700,000 fuel pebbles annually, equivalent to 5 metric tons of uranium, with capacity to supply fuel for up to 11 Xe-100 reactors. The U.S. Nuclear Regulatory Commission earlier this year granted TRISO-X a 40-year Special Nuclear Material License for the facility, described as the first NRC Category 2 fuel fabrication license issued for the processing of high-assay low-enriched uranium.

TX-1 is being developed initially to support X-energy's proposed deployment of its Xe-100 small modular reactor at Dow Inc.'s UCC Seadrift Operations site in Texas under the U.S. Department of Energy's Advanced Reactor Demonstration Program. X-energy is also advancing Xe-100 projects with Energy Northwest, Amazon, and Centrica.

In recent months, TRISO-X expanded its Oak Ridge nuclear fuel campus by approximately 70 acres, extended a cooperative research and development agreement with Oak Ridge National Laboratory, and initiated construction of TX-L, a dedicated research and development facility. The State of Tennessee has also provided economic development support for the campus expansion.