The Three Mile Island nuclear plant, home of the worst nuclear accident in U.S. history, would restart under a deal in which Microsoft purchases all its power.

Five years after a nuclear reactor at the Three Mile Island plant in central Pennsylvania closed amid financial troubles, its owner wants to bring it back online. Baltimore-based Constellation Energy Corp.

TMI Unit 1 has been owned by Constellation since 2022, when it spun out of Exelon. The power generation company owns and operates 21 reactors nationwide, at 14 different locations including the Peach Bottom nuclear plant in York County and Limerick in Montgomery County.