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Deployable Energy Announces Unity Demonstration Reactor Achieves Criticality At Idaho National Laboratory

By Nigel Davies
2 July 2026

DOE says US has met 4 July reactor criticality target set by president Trump

Deployable Energy Announces Unity Demonstration Reactor Achieves Criticality At Idaho National Laboratory
US energy secretary Chris Wright examines a fuel rod during a visit to Idaho National Laboratory, as part of preparations for Deployable Energy's demonstration reactor criticality test. Courtesy Deployable Energy/DOE.
US-based Deployable Energy’s demonstration reactor, Unity, has successfully achieved first criticality, marking the fulfillment of US president Donald Trump’s executive order that three advanced reactors achieve criticality by 4 July.

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