Amazon says it will spend $20 billion on two data center complexes in Pennsylvania, including one it is building alongside a nuclear power plant that has drawn federal scrutiny.

HARRISBURG — Amazon said Monday that it will spend $20 billion on two data center complexes in Pennsylvania, including one it is building alongside a nuclear power plant that has drawn federal scrutiny over an arrangement to essentially plug right into the power plant.

Talen Energy (NASDAQ:TLN) +9.7% pre-market Wednesday after saying it has expanded its nuclear energy relationship with Amazon (NASDAQ:AMZN) to provide carbon-free energy from Talen’s Susquehanna nuclear power plant in Pennsylvania to Amazon Web Services data centers in the region.