Constellation Nuclear
4300 Winfield Road Warrenville, IL 60555Company Summary Information
Constellation Nuclear is ranked #1 out of 5,078 utilities nationwide in terms of total annual net electricity generation, and they are ranked #1 out of 29 utilities in terms of total annual net electricity generation from nuclear.
Constellation Nuclear generated 61.3 TWh during the 3-month period between November 2025 to February 2026.
| Company Name | Constellation Nuclear |
|---|---|
| Location | 4300 Winfield Road Warrenville, IL 60555 |
| EIA Utility Type | Independent Power Producer |
| EIA Utility Dates | Jan 2001 to Feb 2026 |
| EIA Annual Generation | 196.1 TWh |
| EIA Power Plants | 14 |
| Fuel Types | Nuclear |
| Ranked #1 out of 5,078 Utilities Nationwide by Annual Generation | |
| Ranked #1 out of 29 Utilities Nationwide in terms of Nuclear Generation | |
Map of Constellation Nuclear Locations
Register Now for Comprehensive Access
Subscribe now to access all power plant data, utility information, FERC EQR data, and more for Constellation Nuclear.
Monthly Electricity Generation by Type
Monthly electricity generation by source as reported by the EIA
Power Plants Operated by Constellation Nuclear
| Plant | Location | Annual Generation | Initial Operation Date | Last Update | Fuel Types |
|---|---|---|---|---|---|
| Braidwood Generation Station | Braceville, Illinois | 20 TWh | Jun 1988 | Feb 2026 | Nuclear |
| Byron Generating Station | Byron, Illinois | 20 TWh | Aug 1985 | Feb 2026 | Nuclear |
| Calvert Cliffs Nuclear Power Plant | Lusby, Maryland | 15 TWh | Apr 1975 | Feb 2026 | Nuclear |
| Clinton Power Station | Clinton, Illinois | 8 TWh | Oct 1987 | Feb 2026 | Nuclear |
| Crane Clean Energy Center | Middletown, Pennsylvania | - | Jul 1974 | Sep 2019 | |
| Dresden Generating Station | Morris, Illinois | 15 TWh | Jul 1970 | Feb 2026 | Nuclear |
| James A Fitzpatrick | Lycoming, New York | 7 TWh | Jul 1976 | Feb 2026 | Nuclear |
| LaSalle Generating Station | Marseilles, Illinois | 19 TWh | Dec 1983 | Feb 2026 | Nuclear |
| Limerick | Sanatoga, Pennsylvania | 19 TWh | Jan 1986 | Feb 2026 | Nuclear |
| Nine Mile Point Nuclear Station | Lycoming, New York | 16 TWh | Nov 1969 | Feb 2026 | Nuclear |
| Oyster Creek | Forked River, New Jersey | - | Nov 1969 | Sep 2018 | |
| Peach Bottom | Delta, Pennsylvania | 22 TWh | Jun 1974 | Feb 2026 | Nuclear |
| Quad Cities Generating Station | Cordova, Illinois | 15 TWh | Nov 1972 | Feb 2026 | Nuclear |
| R E Ginna Nuclear Power Plant | Ontario, New York | 5 TWh | Jun 1970 | Feb 2026 | Nuclear |
Other Companies Listed Alphabetically
A list of companies close to Constellation Nuclear when arranged alphabetically. They do not neccessarily have any association with Constellation Nuclear.