Key points:
- Amazon and Constellation announced a 20-year deal on Sept. 30 covering 690 megawatts at Calvert Cliffs in Maryland.
- Google and Constellation followed Oct. 6 with a $4.3 billion expansion across 11 reactors.
- The Ratepayer Protection Pledge promises data centers will not raise household bills.
- Critics say nuclear has not yet met real data center demand and new reactors remain a decade away.
- The Energy Department approved roughly $4.4 billion in loans to restart three nuclear facilities.
The mechanics of the deals fit on a napkin, though the implications do not. On Sept. 30, Constellation Energy and Amazon announced a 20-year power purchase agreement for 690 megawatts from Calvert Cliffs, the Maryland plant perched on the Chesapeake Bay. Constellation said the arrangement will channel more than $3 billion into state infrastructure, and 190 of those megawatts will come from an uprate, a set of engineering upgrades that coaxes extra output from an existing reactor. Six days later, Google and Constellation revealed a 20-year agreement to expand production at 11 reactors, backed by a $4.3 billion investment. The Wall Street Journal reported that the companies called it the largest nuclear uprate project ever struck between a technology firm and a power producer. One analysis published by RealClearEnergy went further, calling the Google announcement "one of the most important and under-appreciated announcements" in the energy debate.
The uprate gambit and the electricity arms race
Why squeeze old reactors instead of building new ones? Because building is a slog. The Chicago Tribune reported that half of the 250 attempts to build nuclear reactors since 1960 were canceled before producing a single watt. Georgia's Vogtle expansion, the first new American reactors in decades, reached commercial operation in 2023 and 2024 only after years of delay and billions in overruns. An uprate skips that purgatory.
Meanwhile, the appetite is ferocious. The International Energy Agency found that data center electricity demand rose 17 percent in 2025, against roughly 3 percent for global electricity demand overall, and it is set to double by 2030, according to Nuclear News Network. A single legacy reactor produces about 800 megawatts, while AI data centers can require up to 5 gigawatts, according to a Deloitte analysis reported by Trellis. When you do the arithmetic, Google's 890 new megawatts equal roughly one old reactor, and one hungry campus could swallow five times that.
The shopping spree reaches well beyond these two deals. Meta secured 1,121 megawatts from the Clinton plant in Illinois starting in June 2027, and a broader Meta package totals 6.6 gigawatts. Amazon buys up to 1,920 megawatts from Talen Energy's Susquehanna plant through 2042, after paying $650 million for a data center campus beside it. Microsoft arranged to revive a unit at Three Mile Island, the Pennsylvania site that became shorthand for nuclear dread after the 1979 partial meltdown. Gizmodo reported that Amazon, X-energy and American Electric Power are exploring a 960-megawatt plant in Indiana, and that the Energy Department has approved roughly $4.4 billion in loans to restart three nuclear facilities, two of them with major tech backing. The pattern is hard to miss. The giants are fencing off the steadiest electricity on earth, the around-the-clock baseload that hospitals, factories and families also depend on.
Who pays when the promise meets the meter
The official reassurance arrives in the form of the Ratepayer Protection Pledge, President Donald Trump's demand that data centers secure and pay for their own power. Under the pledge, as quoted by the Carnegie Endowment for International Peace, leading hyperscalers guarantee data centers' energy needs "will not increase household electricity costs." The companies also vow to pay for new power delivery upgrades. The RealClearEnergy analysis described the Google and Amazon deals as ways of carrying out that pledge.
However, a Latitude Media podcast on Meta's nuclear push noted that critics argue parts of the company's deal do not add capacity fast enough, possibly pushing electricity prices higher in an already tight market. Capacity auction prices in several U.S. power markets have repeatedly hit record highs, according to a Stock News report, and long-term contracts with tech giants are creating a lucrative new revenue model for existing nuclear units. If the biggest buyers lock up proven reactors without building enough new supply, the public must compete for whatever is left.
The Bulletin of the Atomic Scientists pressed the point in July, concluding that nuclear power has played no role so far in meeting the increased demand from data centers. Any reactor output steered to server farms, it argued, would have to be diverted from the general public or other traditional customers. The Bulletin added that new reactors are at least a decade away and that tech's investments in advanced designs are mismatched to the true cost of building even one. The Carnegie Endowment likewise found that those years-long timelines are misaligned with the pace of data center expansion. Ramana, a University of British Columbia professor, warned that despite Big Tech's wealth, the companies will not be the ones footing the bill.
The public mood adds another wrinkle. A Gallup finding cited by Nuclear News Network put opposition to local AI data centers at 71 percent. That gap between corporate ambition and community consent may prove as stubborn as any reactor containment dome. Whether America is witnessing an energy abundance story or the construction of a private toll booth on a public grid will be settled not by press releases, but by the monthly bill landing on the kitchen table.
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