Constellation considers advanced nuclear in Maryland

November 5, 2025, 12:00PMNuclear News

Constellation is considering adding 2,000 MW of nuclear energy at Calvert Cliffs, located on Chesapeake Bay near Lusby, Md., which would effectively double the site’s output, according to the company’s near- and long-term project proposals submitted to the Marland Public Service Commission this week.

In addition, Constellation plans to relicense Calvert Cliffs for another 20 years. If fully implemented, 70 percent of Constellation’s combined near- and long-term investments would be in clean energy.

Calvert Cliffs is Maryland’s only nuclear power plant, and it currently produces 40 percent of the state’s electricity.

Clean energy credits: Constellation is also adding nuclear energy as part of its clean energy–based, emission-free energy certificates in the PJM region—a move that could further bolster nuclear buildouts in the region.

Xpansiv, an infrastructure provider for global energy markets, is partnering with Constellation to provide its North American Renewables Registry, which will issue nuclear energy–based, zero-emission certificates.

“We believe the most important energy commodity is a reliable and clean megawatt, and our clean energy resources offer more clean, emissions-free energy than any other energy provider in the U.S.,” said Jim McHugh, chief commercial officer at Constellation.

Meeting growing demand: Constellation and Xpansiv are preparing to meet the growing demand from the private sector—particularly tech companies—for clean energy. The growing demand is being propelled by the explosion on AI data centers, which require immense amounts of electricity to power them. Global data center power demand is expected to grow 160 percent by 2030, according to Goldman Sachs Research.


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