X-Energy

X-Energy's primary design is the Xe-100, an 80-megawatt high-temperature gas-cooled pebble-bed reactor that can be grouped into four-unit plants producing 320 MW. The reactor uses TRISO fuel — uranium kernels coated in carbon and ceramic layers that contain fission products at temperatures well beyond postulated accident conditions. The helium coolant exits at roughly 750°C, making it suitable for industrial process heat applications that light-water reactors cannot economically supply.

Dr. Kam Ghaffarian, who founded the company in 2009, serves as Executive Chairman. He previously built SGT into a major provider of engineering services for NASA, the Department of Defense, and the intelligence community. J. Clay Sell serves as Chief Executive Officer; he was the Deputy Secretary of the US Department of Energy under President George W. Bush and brings the regulatory and political relationships critical to nuclear licensing. The engineering leadership includes veterans from the US Navy nuclear program, Oak Ridge National Laboratory, and the Nuclear Regulatory Commission.

X-Energy has raised capital through a combination of private equity investment, government cost-share agreements, and strategic corporate partnerships. The US Department of Energy's Advanced Reactor Demonstration Program committed an initial $80 million in 2020 to support the Xe-100 licensing and demonstration roadmap. The company pursued a public listing via a SPAC merger with Ares Acquisition Corporation announced in September 2023 but terminated that path one month later, electing to remain privately funded without disclosing the specific alternative investors.

TRISO — tristructural isotropic — fuel consists of a uranium oxycarbide kernel surrounded by layers of carbon and silicon carbide designed to withstand extreme temperatures without releasing fission products. X-Energy operates its own TRISO fuel fabrication pilot line at Oak Ridge National Laboratory in Tennessee, making it one of the few advanced reactor companies pursuing vertical integration into fuel supply. The firm's stated objective is to establish a domestic supply chain independent of Russian enrichment, which currently dominates the high-assay low-enriched uranium (HALEU) market.

Yes. Dow announced in 2023 that it had selected the Xe-100 design for an industrial installation at its Seadrift, Texas manufacturing site, aiming to demonstrate nuclear process heat for chemical production (per Dow, 2023). The deployment is contingent on regulatory licensing and final investment decisions. X-Energy had previously pursued a demonstration project with Energy Northwest in Washington state, supported by the Department of Energy award.

X-Energy is a privately financed corporate entity, not a family office. The founder Kam Ghaffarian holds significant equity, but the firm has been capitalized through institutional investors and government funding vehicles, not a single-family balance sheet. The broader Ghaffarian enterprise portfolio — which includes Intuitive Machines and Quantum Space — operates as separate corporate entities rather than a consolidated family-office structure.

X-Energy is engaged in pre-application and licensing activities with the US Nuclear Regulatory Commission (NRC). The company has submitted a licensing project plan and topical reports addressing key technical elements of the Xe-100 design. NRC staff have begun review of these materials, but final design certification — the milestone that would permit commercial construction — remains pending as of the most recent public disclosures.