DOE Commits $1B to Revive Three Mile Island Nuclear Reactor in Microsoft-Backed Deal
The U.S. Department of Energy has finalized a $1 billion loan to Constellation Energy to restart the sole operational reactor at Pennsylvania's Three Mile Island, now rebranded as the Crane Clean Energy Center. Microsoft will purchase 20 years of output to power its data centers, leveraging the reactor's 835-MW capacity—enough for nearly 800,000 homes.
Constellation cites the DOE's unprecedented simultaneous conditional commitment and financial close as a testament to its credit strength. The project, part of a broader nuclear portfolio expansion, requires $1.6 billion to modernize cooling systems, turbines, and transformers ahead of a planned 2027 relaunch.