The milestone completes the primary building structure of the 214,000-square-foot facility and enables the project to advance fully into its next phase of construction, including interior buildout, installation of fuel fabrication equipment and continued construction of supporting facilities.

Clark Construction Group continues to serve as construction contractor, leading interior buildout of the facility’s process equipment and administration building, installation of fuel fabrication equipment, and construction of an adjacent graphite matrix powder building. Last month, TRISO-X announced that it had initiated elements of this next phase as vertical construction neared completion. With the structure now complete, construction activity shifts to the systems, equipment and infrastructure required to prepare TX-1 for commercial operations.

Once operational, TX-1 is expected to produce approximately 700,000 TRISO-X fuel pebbles annually, equivalent to 5 metric tons of uranium ("MTU"), with capacity to provide fuel for up to 11 Xe-100 reactors. The U.S. Nuclear Regulatory Commission ("NRC") granted TRISO-X a 40-year Special Nuclear Material License for the facility earlier this year, the first-ever NRC Category 2 fuel fabrication license issued for the processing of high-assay low-enriched uranium. TX-1 is expected to be the first new commercial-scale advanced U.S. nuclear fuel fabrication facility built in more than 50 years.

The completion of vertical construction builds on a period of sustained progress across TRISO-X’s Oak Ridge operations. In recent months, the Company expanded its nuclear fuel campus by approximately 70 acres, extended its cooperative research and development relationship with Oak Ridge National Laboratory, initiated construction of TX-L, a dedicated research and development facility, and received economic development support from the State of Tennessee for continued expansion of its advanced nuclear fuel campus.

TX-1 is being developed initially to support X-energy’s proposed deployment of its Xe-100 advanced small modular reactor at Dow Inc.’s UCC Seadrift Operations manufacturing site in Texas through the U.S. Department of Energy’s Advanced Reactor Demonstration Program. X-energy is also advancing additional Xe-100 projects in partnership with Energy Northwest, Amazon, and Centrica as demand grows for secure, reliable, and scalable nuclear energy.