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X-energy Commences First Irradiation Tests of Advanced TRISO-X Nuclear Fuel at Idaho National Laboratory

LCG, November 6, 2025--X-energy Reactor Company, LLC, (X-energy) and the U.S. Office of Nuclear Energy today announced the start of confirmatory irradiation testing at Idaho National Laboratory (INL) to qualify X-energy’s proprietary TRISO-X fuel pebbles for commercial use in the Xe-100 Small Modular Reactor (SMR). (TRISO stands for TRi-structural ISOtropic). This is the first time that TRISO-X fuel pebbles will undergo irradiation testing in a U.S. lab, which is a critical step in meeting requirements set forth by the U.S. Nuclear Regulatory Commission (NRC) for the commercial deployment of advanced reactors that will use the fuel.

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NextEra Energy and Google Collaborate on Accelerating Nuclear Power Deployment

LCG, October 28, 2025--NextEra Energy and Google yesterday announced two agreements that will help meet growing electricity demand from artificial intelligence (AI) with clean, reliable, 24/7 nuclear power and strengthen the nation's nuclear leadership. First, Google signed a new, 25-year agreement for power generated at the Duane Arnold Energy Center, Iowa's only nuclear power facility. The 601-MW boiling water reactor unit was shut down in 2020 and is expected to commence operations by the first quarter of 2029, pending regulatory approvals to restart the plant.

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Industry News

Repowered Colorado Nuke Provides 720 Megawatts

LCG, June 13, 2001Xcel Energy Inc. said yesterday that its Public Service Co. of Colorado subsidiary's conversion of the decommissioned Fort St. Vrain nuclear power plant to operate on natural gas has been completed and the facility is producing 720 megawatts of much-needed power.

Fort St. Vrain was a 366 megawatt high temperature, gas-cooled reactor completed in 1979. The unusual design almost all U.S. commercial reactors are water-cooled was plagued with problems and the plant was permanently shut down in 1989. In 1996, it became the first U.S. nuclear plant to complete decommissioning.

But the infrastructure was still there the switchyard, interconnection with the grid and most of all the steam turbine-driven generator. Since decommissioning, three gas-fueled turbine generators of 140 megawatts each have been installed and a heat recovery steam generator that will provide steam to spin the original generator.

Public Service Co. will need the power. Since 1990, its customer base has grown 20 percent and the average residential customer is using 12 percent more power. There has been concern that Colorado could suffer a supply problem similar to that which caused California's energy crisis.

"Our customers want to know whether we'll face the same situation here. I'm pleased to say that we don't expect to, and the fully repowered Fort St. Vrain station is one of the largest reasons why I am so confident," said Cynthia Evans, an Xcel vice president.

Fort St. Vrain is expected to provide about 12 percent of Xcel's demand in Colorado, David Wilks,president of energy supply for Xcel, told reporters.

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