Microsoft has signed a 20-year agreement with Constellation Energy Corporation, the owner of the Three Mile Island nuclear power plant, to refurbish the plant's Unit 1 reactor to establish the "Crane Clean Energy Center." This is part of the tech giant's effort to power its artificial intelligence operations with carbon-free energy.

As part of the agreement, Constellation Energy will supply Microsoft with 835 megawatts of electricity and invest approximately $1.6 billion to bring the facility online, aiming for a 2028 launch. The deal still requires approval from the Nuclear Regulatory Commission (NRC), state officials, and local authorities before it can resume operations.

Located near the Susquehanna River in Pennsylvania, USA, the Three Mile Island nuclear power plant experienced a meltdown on March 28, 1979. The incident was rated as a level 5 on the International Nuclear Event Scale, a seven-level system.

The Three Mile Island nuclear leak is the most serious nuclear accident in the United States to date. However, compared to the Chernobyl and Fukushima nuclear accidents, it remained under control.