Microsoft isn't the only tech company looking to nuclear power to fuel its AI ambitions. Earlier this year, Amazon.com Inc.'s cloud computing division agreed to spend $650 million to acquire a data center campus connected to Talen Energy Corp.’s 40-year-old nuclear power plant on the Susquehanna River in Pennsylvania.

Three Mile Island, the site of worst nuclear disaster in the United States, is reopening and will sell the power to Microsoft for its AI efforts.

America's Three Mile Island nuclear energy plant, the site of a high-profile accident that discouraged nuclear power development in the US for decades, is preparing to reopen as Microsoft looks for ways to satisfy its growing energy needs.