Two American energy companies are each preparing to bring a nuclear power station back into service, an unprecedented operation which should help meet the growing need for electricity in the United States.

Constellation Energy and Microsoft plan to restart the Three Mile Island nuclear plant, hoping they have scored a quick source of enough climate-friendly energy to power rapidly expanding data centers for artificial intelligence (AI).

Big Tech needs electricity to fuel its rapid, electricity-guzzling expansion of its AI capabilities, but a recent deal between Constellation Energy and Microsoft can't fill the gap immediately.