Constellation touts near-perfect summer energy reliability

QC charts 98.48% reliability despite hot, wet season

By: Kenda Burrows|September 24, 2025

|3 min read

Constellation’s Quad Cities Clean Energy Center’s two nuclear reactors at Cordova, Illinois, can produce enough electricity to power more than 1 million homes. CREDIT CONSTELLATION

During a summer of lengthy heatwaves marked by record-breaking torrential rains and high humidity, Constellation reported this month that its nationwide fleet of emissions-free nuclear clean energy centers ran at nearly full power 98.8% of the time.

The numbers here in the Quad Cities, which is served by the…

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Constellation touts near-perfect summer energy reliability

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