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Constellation Energy Reports Fall in Q1 Nuclear Output

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Constellation Energy (CEG) on Monday reported Q1 production of 44.67 terrawatt-hours by its nuclear fleet, down from 45.58 TWh in the corresponding quarter last year.

The production includes the company's owned output from the Salem and South Texas Project generating stations, the company said in its Q1 earnings statement.

The Maryland-based energy company said its nuclear plants, excluding Salem and STP, reported a 92.3% capacity factor in Q1, versus 94.1% in the year-ago period.

"There were 99 planned refueling outage days in the first quarter of 2026 and 88 in the first quarter of 2025 for sites we operate. There were no non-refueling outage days in the first quarter of 2026 and 2025 for sites we operate," the company added.

Earlier in January, the company completed the acquisition of Texas-based power producer Calpine from Energy Capital Partners in a deal valued at about $16.4 billion.

Last month, its 460 megawatt Pin Oak Creek Energy Center natural gas-fired peaking power plant in Freestone County, Texas commenced commercial operations. The 105 MW Pastoria solar project in California's Kern County was also commissioned in April.

In Q1, the company reported an equivalent forced outage factor for its natural gas, oil, and pumped-storage hydro fleet at 4.5%. EFOF is the percentage for which a generating unit is unavailable due to unplanned outages and forced deratings during a certain period.

During the quarter, renewable energy capture for the company's wind, solar and run-of-river hydro fleet stood at was 96.7%, up from 96.2% last year.

Constellation Energy has a capacity of 55 gigawatts from nuclear, natural gas, oil, geothermal, hydro, wind and solar facilities and provides power to about 2.5 million customers, according to its statement.

Price: $299.47, Change: $-4.16, Percent Change: -1.37%

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