In September 2024, Microsoft agreed to buy the power from a reactor that had been shut for five years, at a site whose name is still shorthand for America’s worst nuclear accident. Three Mile Island Unit 1 is now the Crane Clean Energy Center, and if Constellation Energy hits its target, it will be sending power back into the Pennsylvania grid in 2027, under a 20-year contract with a software company that needs the power for its AI data centres. That single deal says a lot about AI’s power problem. The companies building large language models have discovered that chips…
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