The U.S. Department of Energy said Tuesday it will loan $1 billion to help finance the restart of the long-idle nuclear reactor at Pennsylvania’s Three Mile Island, which is under contract to supply power to Microsoft data centers. The move aligns with President Donald Trump’s priorities of boosting nuclear energy and supporting the growth of artificial intelligence.

Why It Matters

Three Mile Island, located in the Susquehanna River near Harrisburg, was the site of the nation’s worst commercial nuclear accident in 1979, when a partial meltdown destroyed Unit 2. The plant’s remaining reactor, Unit 1, operated for decades until Constellation Energy's former parent company, Exelon, shuttered it in 2019, citing financial losses and the absence of state subsidies to keep the facility runn

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