Microsoft has signed a deal with the Constellation Energy Corporation — the owner of the Three-Mile Island nuclear site — to reopen the Pennsylvania facility and provide the tech company with clean energy for its artificial intelligence operations. The 20-year deal between Microsoft and Constellation will see the restoration of the Three-Mile Island Unit 1 reactor to host the “Crane Clean Energy Center” as part of the tech giant’s commitment to powering its artificial intelligence business through carbon-free power. As part of the agreement, Constellation Energy will supply 835 megawatts of po…