The Ward250 is here. Eight modules, reassembled inside a building at the Utah San Rafael Energy Lab, on foundations poured into the floor of Castle Valley. If its builders are right, it will host a self-sustaining nuclear chain reaction on July 4, the first in Utah's history, timed to the 250th anniversary of the Declaration of Independence.
That is 24 days from now. The Department of Energy said in a May 22 progress report that three of the program's eleven projects had secured a Final Documented Safety Analysis. It did not name them. Under program agreements, DOE must also approve each reactor's safety basis and grant startup authorization before operations begin, according to terms one participant disclosed in a securities filing. Neither Valar Atomics nor DOE has publicly confirmed fuel loading in Orangeville. The fuel is being fabricated at Valar's plant in Hawthorne, California, under a separate DOE fuel-line pilot, with a second fabrication facility under construction adjacent to the reactor. Between today and the Fourth, those are the gates.
How it got here
The reactor arrived by air. On February 15, three C-17 Globemaster III aircraft flew the unfueled Ward250 from March Air Reserve Base in California to Hill Air Force Base, the first military airlift of a nuclear reactor. The Pentagon called it Operation Windlord. The flights were carried out by the 62nd Airlift Wing, the only Air Force unit certified to routinely transport nuclear weapons. A truck convoy carried the modules south to Emery County.
Energy Secretary Chris Wright stood on the tarmac with Gov. Spencer Cox, Sen. John Curtis, and Under Secretary of War Michael Duffey. Wright called it "an incredible 5-megawatt reactor that powers 5,000 homes." That figure is his. The math assumes 1 kilowatt per household and that the unit in Orangeville is the 5-megawatt design. More on that below.
Valar Atomics was founded in 2023 by Isaiah Taylor, who was 26 when the planes landed. The company broke ground at the San Rafael lab in September 2025, with Kiewit handling engineering and construction. By late January, contractors had moved roughly 40,000 cubic yards of material and poured more than 4,000 cubic yards of concrete. In April, Valar raised $450 million at a $2 billion valuation to build reactors for AI data centers.
The design is a high-temperature gas reactor. TRISO fuel, uranium kernels sealed in ceramic layers. Graphite moderators. Helium as a coolant instead of water, a detail that matters in a county where water has shaped every energy decision for a century. Valar has one criticality milestone behind it: in November, a scaled model of the Ward250 core reached zero-power criticality at a Los Alamos test facility in Nevada, the first such milestone in the federal pilot program. Cold criticality proves the physics. It does not prove the power plant.
What July 4 means, and what it doesn't
The Ward250 is one of eleven projects DOE selected in August for its Reactor Pilot Program, created under Executive Order 14301 with the goal of at least three test reactors critical by Independence Day.
Two gaps sit inside the celebratory framing.
The first is the difference between criticality and power. The state's own description is modest: the San Rafael lab says the reactor is designed for research and development, not power generation, built to validate components, train personnel, and inform regulation. Officials at Hill described a machine that would begin generating power by the Fourth. Criticality is a chain reaction. Power is electricity serving customers. The July 4 target is the former.
The second is the reactor's size. The American Nuclear Society described the Ward250 in November as a 100-kilowatt-thermal test reactor. By February, official descriptions had settled on 5 megawatts. One figure describes a test configuration, the other a design class. Neither Valar nor DOE has publicly stated which describes the unit now in Orangeville.
The regulator that isn't there
The pilot program's defining feature is what it removes. DOE's request for applications stated that reactors built under the program will not require Nuclear Regulatory Commission licensing, while promising approved designs a fast track to NRC licensing later.
Valar's posture toward the NRC goes further than most. In April 2025, the company joined a federal lawsuit challenging the commission's interpretation of the Atomic Energy Act, alongside Utah, Texas, Florida, Louisiana, the Arizona legislature, and two other reactor startups. E&E News reported that Valar has never contacted or met with the commission. Taylor defended that choice in the same report, asking, "Why would you engage in the process?" if you believe the agency's jurisdiction is wrong.
Critics see the whole structure as a risk. In January, NPR reported that DOE had rewritten the internal orders governing pilot program reactors without public notice, cutting more than 750 pages from the rules. Among the changes NPR documented: seven security directives totaling over 500 pages were consolidated into a single 23-page order, and a decades-old standard requiring operators to keep radiation exposure as low as reasonably achievable was removed. Edwin Lyman, director of nuclear power safety at the Union of Concerned Scientists, told NPR the administration is "taking a wrecking ball" to the oversight system that has prevented another Three Mile Island. Christopher Hanson, the NRC chair fired by Trump in 2025, told NPR that relaxing safety standards in secret is not the way to build the public trust nuclear power needs. DOE told NPR the changes cut unnecessary regulation without jeopardizing safety, and that it expects to post the directives publicly later this year. The Ward250 will go critical under those rules.
Forty miles east, a slower clock
While Valar races a deadline, a much larger project has new life. The Green River nuclear site was first proposed in 2007; Blue Castle Holdings began pre-application work with the NRC on an early site permit by 2011 and once planned a two-unit Westinghouse plant there. Last month Blue Castle announced a joint venture with Fulcrum Point Holdings, an affiliate of Utah nuclear services firm Hi Tech Solutions, to carry the project through federal licensing using Holtec International's SMR-300, a pressurized water reactor producing about 300 megawatts of electricity per unit. Reported plans call for two to four units, which would total 600 to 1,200 megawatts.
Water runs through this story too. Holtec is pitching the SMR-300's optional air-cooled condensers for arid sites, and Blue Castle says the Green River site comes with existing water rights, rail access, and two decades of seismic, groundwater, and ecological study. Unlike the Ward250, this project will go through the NRC. Its chairman told the Deseret News in May that the agency now engages developers before applications arrive to cut drag from the process.
Green River City Manager Edward Castro Bennett traveled to Hill in February for the Ward250's arrival. He told the Deseret News that landing this industry would be "a generational game changer" for a town with a municipal airport, an Amtrak station, water, and people who want to work. Two days after the airlift, the Emery County Commission approved a letter of support for Valar. Commissioner Dennis Worwood said the county sees the company not as a competitor to coal but as an expansion of an energy portfolio Emery County has carried for generations. Valar says it has hired locally and intends to keep doing so. Carbon and Emery absorbed the losses when coal declined. Officials there told the Deseret News they see small reactors as a path back.
The utility on the longest clock
None of this yet touches a power bill. PacifiCorp's final 2025 Integrated Resource Plan update, released March 31, proposes only two new generation sources for Utah: gas in the mid-2030s and a nuclear demonstration project in 2032. The plan includes no new solar, wind, or geothermal for Utah customers, a reversal from the prior plan's 1.4 gigawatts of wind and solar. The 2032 project ties to the Natrium reactor under construction in Kemmerer, Wyoming. HEAL Utah has criticized Rocky Mountain Power for keeping the deal's cost-benefit details confidential in filings with the Public Service Commission, which has not yet approved the plan.
Three clocks
So watch the clocks. Valar's expires in 24 days, and the things to watch are concrete: fuel delivery to Orangeville, DOE startup authorization, confirmation of whether the Ward250 is among the three projects with a completed safety analysis, and an answer to the megawatt question. Green River's runs through years of NRC review. PacifiCorp's runs to 2032, behind redacted filings.
If a chain reaction starts in Castle Valley on the Fourth, it happens in a county built on coal, under safety rules rewritten without public comment, on a deadline set by executive order. If it doesn't, the deadline was political, and the reactor will still be sitting there on July 5, waiting on the same reviews. Either way, Utah's nuclear era starts in Emery County. The only question is which clock it keeps.
