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.

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.

One data center is being built next to northeastern Pennsylvania’s Susquehanna nuclear power plant. The other will be in Fairless Hills at a logistics campus, the Keystone Trade Center, on what was once a U.