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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

Midwest ISO and Southwest Power Pool Will Merge

LCG, Feb. 25, 2002--The directors of the Midwest Independent Transmission System Operator Inc. (ISO) and Southwest Power Pool Inc. (SPP) gave their approval to a merger of the two power transmission grid managers.

The resulting organization would have responsibility for transmission operations in twenty states and in the Canadian province of Manitoba. The Midwest ISO projects that it will submit required documents to FERC by March 15, and finalize the merger by the close of the second quarter.

The nonprofit Midwest ISO is currently negotiating with the for-profit Alliance RTO, following a December order from FERC for the two to merge, based on transmission bottlenecks that could persist if the two remained separate.

Some state representatives have asked for more justification for FERC's emphasis on the RTO concept. FERC, which is making the right of utilities to compete in deregulated power markets dependent on their membership in an RTO, will release a cost-benefit study next week, according to a spokesman.

Negotiations over the possible terms of a Midwest-Alliance merger were held up most recently when members of the Midwest ISO found Alliance's proposed transmission rates unacceptable. The Alliance RTOs members include Indiana Michigan Power Co., American Electric Power Co Inc., and Northern Indiana Public Service Co.
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