AINEWS
The 20 year, $4.3B Constellation deal lands as PJM, the 13 state grid operator, proposes a rule that would let it remotely cut data center load during peak demand — the mechanism that turned a regulatory idea into a signed contract.
Google didn't sign 20-year nuclear power contracts to chase AI demand. It signed them because the operator of the largest US power grid is drafting a rule that would let it remotely disconnect data-center load during a peak-demand crunch.
That is the mechanism behind the deal Google and Constellation Energy announced on Tuesday: 3,590 megawatts of contracted power, more than $4.3 billion in new Constellation investment, and the first major corporate procurement shaped directly around PJM Interconnection's "bring your own power" proposal.
3,590 MW is roughly the output of three large nuclear reactors, enough to power several million homes. Only 890 MW of that is genuinely new nuclear capacity. The other 2,700 MW sits in a 15-year contract not tied to a specific generation source, and effectively monetizes Constellation's existing fleet with long-term revenue certainty.
The 890 MW tranche is real new build, but not the kind that requires pouring concrete. Constellation will upgrade the thermal and electrical efficiency of 11 reactors it already owns in Illinois, Pennsylvania, and New Jersey under a 20-year power purchase agreement. The first upgraded plant is expected to deliver in 2028. The deal is expected to sustain roughly 4,400 existing jobs and create approximately 7,200 construction jobs during the build period.
PJM, the largest US power grid, spanning 13 states from the mid-Atlantic into the Midwest, has not yet adopted the "bring your own power" rule. It is a management proposal in active rulemaking. Under the draft, large data-center customers would have to bring their own generation or face remote curtailment when the grid is strained. The deal is explicitly positioned in response.
Constellation is the largest US nuclear operator and also owns a major natural-gas-fired fleet. That mix makes it the natural counterparty for a hyperscaler trying to bundle dispatchable, around-the-clock generation into one long-term contract. The PJM rule is the lever that turned long-dated optionality into a signed contract.
Constellation restarted Three Mile Island for Microsoft under a similar structure, and Google previously contracted to restart NextEra Energy's Iowa nuclear plant. The Constellation agreement is the third leg of a 20-year bilateral procurement pattern that pairs hyperscaler balance sheets with nuclear operators willing to spend capital on upgrades.
For other PJM customers, the deal raises a separate question. If hyperscalers buy their way around the grid by financing their own generation, who pays for the transmission upgrades that the freed-up capacity was implicitly subsidizing? The 890 MW upgrade tranche is physical build. The 2,700 MW supply tranche consumes the same grid without the same build obligation. The rate-base effect on other customers has not been priced in the announcement.
A 2028 first delivery is also not a confirmed outcome. It depends on Nuclear Regulatory Commission-equivalent approvals, capital execution, and outage scheduling. The contract terms hold whether or not the PJM rule lands in its current form; the rule is what made the price worth paying.
The next data center to sign a 20-year nuclear PPA in PJM is most likely Amazon or Microsoft, both of which have already announced similar procurement structures with Constellation or its peers. If PJM adopts "bring your own power," it will set the floor for what every hyperscaler in the 13-state footprint has to bring to the table from now on.