The Idaho National Laboratory (INL) will support the advanced testing of Lightbridge fuel.
Office of NEPA Policy and Compliance
April 15, 2026
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The Idaho National Laboratory (INL) will support the advanced testing of Lightbridge fuel. Lightbridge fuel is an alloy (U-Zr) that is co-extruded with a zircalloy cladding in a helical cruciform geometry. Lightbridge fuel is designed for use in light water reactors as it is postulated to improve performance and power uprating compared to conventional UO2 based fuels. The INL will conduct a variety of tasks associated with irradiation testing necessary to validate the performance of Lightbridge fuel by testing it within the Accident Tolerant Fuel 2 (ATF2) loop within the Advanced Test Reactor (ATR).