Nuclear power generator
Appears in 5 stories
Seller and operator of the uprate program
Google and Constellation Energy signed a 20-year power purchase agreement on October 6 covering 3,590 megawatts on the PJM grid, the largest US power market. Of that, 890 megawatts is new capacity from efficiency upgrades at 11 reactors in Illinois, Pennsylvania and New Jersey.
Updated 2 days ago
Owner of Calvert Cliffs; signed 20-year PPA with Amazon
Amazon abandoned plans for a data center beside Maryland's Calvert Cliffs nuclear plant in August after fierce community opposition. Two months later it signed a deal to spend billions upgrading the plant instead.
Updated Oct 8
Seller in the Walmart deal
Walmart just bought nuclear power. On June 23, 2026, the retailer signed a long-term deal for electricity from Constellation's Dresden plant in Illinois. It is Walmart's first nuclear agreement.
Updated Jun 23
Largest U.S. power generator following Calpine acquisition
West Virginia has no base-load natural gas power plants online. Governor Patrick Morrisey announced that Calpine, a Constellation Energy subsidiary, will build a $1 billion, 500-megawatt gas plant in Marshall County as part of $4.2 billion in energy investments. The investments, drawn in just four weeks, aim to transform a coal-dependent economy into what Morrisey calls 'the battery of the East Coast.'
Updated May 22
Nation's largest electricity producer pursuing digital modernization across expanded fleet following Calpine acquisition
The NRC approved something unprecedented in January 2026: replacing analog safety controls at an operating reactor with fully digital systems. Constellation's $167 million upgrade at Limerick replaces 1980s-era control rooms with digital command centers — the first time regulators have approved swapping multiple analog safety systems for a single digital platform with fuel rods still running.
Updated May 21
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