Facebook parent Meta announced an unprecedented deal with Constellation Energy, the largest American nuclear power plant operator, cementing Meta’s turn to turn to nuclear energy to power its energy intensive,

The power purchase agreement will also extend operations at Constellation’s Clinton Clean Energy Center in Illinois for two decades and replace an expiring state tax credit.

Constellation Energy shares are surging in early trading Tuesday after the company said it had struck a 20-year deal to sell nuclear power to Meta Platforms, in the latest tech firm-to-nuclear collaboration aimed at powering data centers.