Google and Constellation Energy announced a long‑term partnership that will add 890 megawatts of new nuclear capacity to the PJM Interconnection, serving about 67 million customers across the Mid‑Atlantic and Midwest.

Under a 20‑year power purchase agreement, Constellation will invest more than $4.3 billion to upgrade 11 nuclear units located at six sites in Illinois, Pennsylvania and New Jersey, with the first additional output expected in 2028.

A separate 15‑year agreement secures 2,700 MW of existing generation, while a five‑year technology alliance will see Google Cloud and Gemini Enterprise deployed to improve grid planning, generation efficiency and infrastructure security.

The upgrades will rely on physical plant efficiency uprates—enhancing turbines, generators and thermal capacity—rather than constructing new reactors, delivering output equivalent to a large new nuclear plant.

Constellation expects the project to preserve 4,400 union and operational jobs and to create roughly 7,200 skilled construction positions during the upgrade cycle.

The partnership is framed as a response to rising electricity demand from AI and data‑center workloads, which require continuous, carbon‑free power that renewables alone cannot reliably provide.