Deployable Energy proposes to conduct a zero-power criticality test of its Unity microreactor core at Idaho National Laboratory (INL), Materials and Fuels Complex (MFC).
Office of NEPA Policy and Compliance
April 15, 2026
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Deployable Energy proposes to conduct a zero-power criticality test of its Unity microreactor core at Idaho National Laboratory (INL), Materials and Fuels Complex (MFC). The test will be performed inside an existing below-grade room within the Neutron Radiography Reactor (NRAD) facility. The purpose of the activity is to experimentally confirm predicted neutronic performance of the Unity core design. The test will measure neutron multiplication as the system approaches criticality under controlled conditions. The activity is limited to zero-power operation and will not generate electricity, thermal energy for use, or sustained reactor power. The test is research-scale and is intended to validate modeling assumptions prior to any future demonstration activities.