Claims vs Record disc-024
documented conflicttechnical State documents: 'full-power' criticality on 18 June and full power on 21 June; DOE and Valar itself describe 18 June as a zero-power test
What was said
- Utah Trust Lands staff memo (September 2026 board packet) (2026-09-17): "The reactor reached full power operations on June 21, 2026"; the board voted on the lease with this in its packet.09.17.2026 TLA Board Packet (Item 10A: SULA 2095-OBA Board of Trustees Memorandum, Carbon County letter, lease map) (Utah Trust Lands Administration (Utah Public Notice Website), 2026-09-17)
- Utah San Rafael Energy Lab (state project page, still live): On June 18, 2026 Ward 250 "successfully achieved full-power fueled criticality at the lab".Valar Atomics (project page) (Utah San Rafael Energy Lab (State of Utah, Office of Energy Development))
- Valar staff at the Price City Council, as ETV News reported it (2026-06-24): Harry Hansen: "Shortly after that, we took it to full power"; Cory Gardner (ETV's paraphrase): the team ramped it to its full 100-kilowatt limit.
- Valar Atomics (Castle Country page): "Days later it reached full power operations".Castle Country (Carbon & Emery County, Utah) (Valar Atomics)
- Isaiah Taylor (Series B post) (2026-08-04): "Ward 250's operability has been proven."Announcing our $1B Series B Led By Sequoia (Isaiah Taylor) (Valar Atomics, 2026-08-04)
What the record shows
- DOE, 18 June 2026: Ward 250 'successfully completed a zero-power fueled criticality demonstration'. DOE's July fact sheet and the Utah Inland Port Authority's September update mention only criticality; no DOE record mentions a power level.Department of Energy Celebrates Second Advanced Reactor Achieving Criticality (U.S. Department of Energy, 2026-06-18)
- ANS, 22 June 2026: Valar 'is now proceeding with a planned power ascension' and on 22 June 'announced it had reached a 10 kWt output', a tenth of the 100 kW limit.Valar's Ward 250 reaches criticality in Utah (American Nuclear Society, Nuclear Newswire, 2026-06-22)
- The only power data Valar has published is one chart with an unlabeled 0-100 'Q_Total' scale plotted against a 'sample index', with no units, dates or times (plan-007).Reactor Power Ascension chart (image on the By the Numbers page) (Valar Atomics, 2026-06-28)
- Valar's own page says that at criticality Ward 250 'completed zero-power testing' and reached full power 'days later': Valar does not claim full power on 18 June.Castle Country (Carbon & Emery County, Utah) (Valar Atomics)
- Valar's statement on 18 June, as POWER reported it: 'The reactor has now begun non-commercial power ascension'.Valar Atomic's Ward 250 Becomes Second Reactor to Go Critical Under DOE Pilot Program (POWER magazine, 2026-06-19)
- The state lab's page repeats, nearly word for word, Valar's statement (as POWER quoted it) that the reactor reached its milestones 'as a complete, fully integrated system configured for power operations'; 'full-power' may derive from that phrase (an inference).Valar Atomics (project page) (Utah San Rafael Energy Lab (State of Utah))
The gap: The state lab's page says Ward 250 achieved 'full-power' criticality on 18 June, which DOE's release and Valar's own page contradict: 18 June was a zero-power test. The Trust Lands memo's 21 June full-power date is possible but unconfirmed: Valar announced 10 kW on 22 June (ANS) and said on 24 June it had reached full power, and an announcement can trail the event. No DOE or independent record of the power reached has been published; the state board had the 21 June date in its packet when it voted.
In plain terms'Criticality' only means the chain reaction sustains itself; a reactor can be critical at almost zero power, and DOE and Valar both describe Ward 250's 18 June milestone that way. The state lab's web page instead calls it 'full-power' criticality, which is wrong. The state land board's memo says full power came on 21 June. Valar announced reaching 10 kilowatts on 22 June and told Price City Council on 24 June that it had reached its 100-kilowatt limit, so full power came somewhere around then; announcements can trail events, so 21 June may be right, but no DOE or outside record shows it. The issue here is state paperwork repeating, and in one case overstating, company milestones, not a Valar claim.
Why it matters: State agencies are repeating performance claims as fact in documents that officials rely on to make decisions.
What would settle it: FOIA to DOE Idaho Operations Office for the power-ascension approvals, hold-point records and operating logs; GRAMA to Trust Lands for the application materials that supplied the 21 June date; ask OED to correct its lab page.