U.S. DOE grants X-energy up to $1 billion more for Texas small modular reactor project with Dow

The U.S. Department of Energy has told X-energy it will receive up to $1 billion in additional federal funding for its small modular reactor project with Dow in Seadrift, Texas. CEO Clay Sell disclosed the award on an earnings call, saying total public support for the project has now reached up to $2.15 billion since 2021.

DOE awards X-energy up to $1 billion in additional funding

The new grant comes through the DOE’s Advanced Reactor Demonstration Program—ARDP, for short. Sell announced it during an earnings call, and the DOE’s Office of Nuclear Energy confirmed it shortly after. Total federal support for the Dow–X-energy collaboration now stands at up to $2.15 billion—a figure that makes the federal government’s confidence in this project hard to miss.

That level of public investment stands out even by nuclear energy standards, where large capital requirements are simply part of the territory.

Rather than funding research alone, the program uses cost-shared partnerships with private companies to push designs from paper toward real commercial deployment.

Cost-share requirements and funding structure

The $1 billion doesn’t come free and clear. Like X-energy’s original ARDP award in 2021, this new funding requires a 50/50 cost-share—for every federal dollar, X-energy and its partners have to put up one of their own. The DOE uses this structure deliberately, spreading financial risk between government and industry rather than placing it entirely on taxpayers.

For X-energy, the stakes are direct. Sell told investors the DOE grant “is our largest source of revenue at our current stage of development.” That’s a candid admission, and it tells you exactly how central federal support is to keeping this project moving.

Requiring industry to put real money on the table filters out projects without genuine commercial backing. It also lowers the barrier for emerging reactor technologies that still need a push to reach viability.

Project scope: Four Xe-100 reactors at Dow’s Seadrift plant

The funding targets a specific goal: installing four Xe-100 small modular reactors at Dow’s Seadrift Operations plant on the Texas Gulf Coast. Together, those four reactors would generate 320 megawatts of electricity and industrial steam—enough to power a major industrial facility at scale.

Seadrift is a petrochemical and plastics plant. The reactors are designed to replace existing energy and steam units currently running on aging fossil-fuel infrastructure—not a minor upgrade, but a direct swap of carbon-intensive sources for nuclear power at an active industrial site.

Sell described the project’s potential in broader terms, calling it the expected “first grid-scale advanced nuclear reactor deployed to serve an industrial site in North America.” If that holds, Seadrift won’t just be a power project—it’ll be a proof of concept for industrial nuclear energy across the continent.

Regulatory progress and operational timeline

Regulatory progress has been steady, though there’s still a ways to go. The project cleared an environmental assessment milestone from the Nuclear Regulatory Commission—a meaningful step in the federal review process—and Dow and X-energy submitted a construction permit application to the NRC last year.

That review is still ongoing. Not unusual for a project this complex, but real regulatory hurdles remain before any ground breaks on the reactor installations.

Operations are targeted for the early 2030s. That puts the project roughly a decade out from its initial 2021 funding to potential first power—a pace that reflects both the scale of the undertaking and how deliberate nuclear licensing tends to be in the U.S.

Background: DOE’s advanced reactor demonstration program

The ARDP was created to solve a problem the U.S. nuclear industry had struggled with for decades: actually getting next-generation reactor designs built. Rather than funding research alone, the program uses cost-shared partnerships with private companies to push designs from paper toward real commercial deployment.

X-energy first received ARDP funding in 2021, making Seadrift one of the program’s longest-running active awards. The fact that the relationship has lasted this long—and that the DOE just committed another billion—signals continued confidence in both the Xe-100 design and the Dow partnership as a workable commercial path.

Small modular reactors sit at the center of the DOE’s strategy for rebuilding domestic nuclear capacity. Unlike conventional large-scale plants, SMRs require less upfront capital and can be sited closer to industrial or remote energy users—a practical fit for applications like Seadrift, where a traditional gigawatt-scale plant wouldn’t be necessary or feasible.

320 MW of electricity and steam

Here’s where things stand: X-energy has secured up to $1 billion in new federal funding through the DOE’s ARDP, bringing total public support for the Dow partnership to up to $2.15 billion since 2021. The money will fund four Xe-100 reactors at Dow’s Seadrift facility, producing 320 megawatts of electricity and steam while replacing fossil-fuel energy sources.

The project remains under NRC review, following a completed Environmental Assessment and a submitted construction permit application. If regulatory approvals stay on schedule, operations could begin in the early 2030s. X-energy’s CEO has called it the expected first grid-scale advanced nuclear reactor serving an industrial site in North America—a distinction that, if it holds, would mark a genuine milestone for the U.S. nuclear industry.

Kelly Lippke

Kelly is an experienced writer with 15 years of experience exploring the big stories that shape our world, from tech breakthroughs and space exploration to climate, energy, and the fascinating quirks of science. She has a talent for turning complex ideas into sharp, memorable insights that stay with readers long after they’ve finished reading.