Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Braidwood Generation Station Will County	Byron Generating Station Ogle County
Capacity	2,449.8 MW	2,449.8 MW
Technology	Nuclear	Nuclear
Operator	Constellation Nuclear	Constellation Nuclear
Operating units	2	2
Latest 12-month generation	19.57 TWh	19.62 TWh
Latest complete-year capacity factor	94.0% (2025)	92.8% (2025)
National technology rank	#9 of 54	#9 of 54
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.

Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Braidwood Generation Station Will County	Byron Generating Station Ogle County
Capacity	2,449.8 MW	2,449.8 MW
Technology	Nuclear	Nuclear
Operator	Constellation Nuclear	Constellation Nuclear
Operating units	2	2
Latest 12-month generation	19.57 TWh	19.62 TWh
Latest complete-year capacity factor	94.0% (2025)	92.8% (2025)
National technology rank	#9 of 54	#9 of 54
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.