Google signs two Constellation contracts totaling 3.6GW; 890MW nuclear PPA funds $4.3B in uprates

Google has signed two contracts with Constellation covering a combined 3.6 gigawatts of generation, and the line between them carries more information than the total. The larger piece, a 15-year agreement to buy 2.7 gigawatts of power across the PJM service area, is not tied to any particular plant; the companies describe it as a way to ensure that Constellation's operating generation assets keep delivering energy and capacity into that market. The smaller piece, a 20-year power purchase agreement for 890 megawatts of nuclear output, is the one carrying capital. It will enable Constellation to invest $4.3 billion in new equipment and technology at 11 of its nuclear units in Illinois, New Jersey, and Pennsylvania.

The two instruments do different work, and only one of them is financing hardware. A 20-year commitment for output from named reactors is the kind of revenue visibility that supports physical spending at those units, and Constellation has attached employment figures to it: 4,400 existing jobs secured and 7,200 created during the build-out, according to the company. Amanda Peterson Corio, Google's global head of energy and power, said the agreement to fund reactor uprates would “strengthen the PJM grid, which serves 67 million people,” while protecting energy affordability and supporting local union jobs.

The 2.7-gigawatt tranche is the harder half to read. Fifteen years buys energy and capacity from a fleet that runs both nuclear and natural gas plants, and because the contract is not tied to a plant, the reporting does not say how much of it will be settled by nuclear output. On the companies' own description, Google is securing the continued participation of an existing fleet in PJM's markets, not output from a chosen facility. The price attached to either contract is not disclosed.

That division of labor has a logic. Firm, named output at a fixed set of reactors is what justifies capital spending on those reactors; a fleet-wide commitment is a claim on whatever the plants deliver into PJM, nuclear or otherwise. Google takes 3.6 gigawatts of contracted supply either way, but only the 890-megawatt piece is tied to assets Constellation intends to upgrade on the strength of the deal.

PJM is the reason both contracts take this shape. The market covers 13 states, among them Virginia and Pennsylvania, both named as data center hotspots, and it expects peak load growth of up to 30 gigawatts through 2030, driven largely by the AI data center buildout. Google's 3.6 gigawatts is a substantial commitment against that number and a modest fraction of it.

Google's nuclear buying runs past PJM and past Constellation. The search and cloud company also holds a power purchase agreement with NextEra Energy, which intends to restart Iowa's 615-megawatt Duane Arnold plant, and an offtake agreement with the owners of Finland's Loviisa nuclear station. Constellation is working its own list of technology counterparties: it hopes to restart the Three Mile Island facility in New York to serve Microsoft, and last month agreed a 20-year PPA with Amazon that will add 190 megawatts of new generating capacity at a Maryland nuclear plant. Across its fleet, the company has been trying to meet rising demand by lifting capacity at its nuclear and gas plants.

The through-line in those agreements is incremental supply rather than new reactors. Duane Arnold and Three Mile Island are idled plants their owners want back in service; the uprates at 11 Constellation units apply a version of that logic to reactors that never stopped running, and they arrive with a workforce already on site, the 4,400 positions the nuclear agreement secures. Amazon's contract put 190 megawatts behind a single facility. Google's puts $4.3 billion of equipment spending behind 11, an offtake supporting a portfolio-scale uprate program rather than a one-site retrofit.

The economics sit in different places. Constellation carries the capital risk on the 890 megawatts and the uprate program that revenue supports, while the 2.7-gigawatt tranche requires no new equipment and monetizes output from plants already running. Google comes away with 3.6 gigawatts of contracted supply in a market whose 13-state footprint includes two named data center hotspots, Virginia and Pennsylvania.

Constellation now sits inside a cluster of hyperscaler power deals: a signed contract with Amazon, a restart it hopes to complete for Microsoft, and this pair of agreements with Google. That concentration lines up long-dated demand behind its existing fleet, and it also ties a meaningful share of that fleet's commercial future to a small set of technology buyers. The benefit is demand the generator can finance against. The exposure is that the demand is concentrated.

Joe Dominguez, Constellation's chairman, president and CEO, said preserving and expanding the output of the existing nuclear fleet, alongside developing new clean generation, is critical to meeting the nation's growing energy needs while keeping costs affordable for homes and businesses. With no pricing in the disclosure, the readable variable is structure: a 20-year offtake behind existing equipment, sized to a specific set of 11 units. Whether other owners of nuclear capacity in PJM reach for the same instrument is the open question.