Constellation Nuclear
4300 Winfield Road Warrenville, IL 60555Company Summary Information
Constellation Nuclear is ranked #1 out of 4,745 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 61.6 TWh during the 3-month period between December 2024 to March 2025.
| Company Name | Constellation Nuclear |
|---|---|
| Location | 4300 Winfield Road Warrenville, IL 60555 |
| EIA Utility Type | Independent Power Producer |
| EIA Utility Dates | Jan 2001 to Mar 2025 |
| EIA Annual Generation | 196.9 TWh |
| EIA Power Plants | 14 |
| Fuel Types | Nuclear |
| Ranked #1 out of 4,745 Utilities Nationwide by Annual Generation | |
| Ranked #1 out of 29 Utilities Nationwide in terms of Nuclear Generation | |
Map of Constellation Nuclear Locations
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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 | 19 TWh | Jun 1988 | Mar 2025 | Nuclear |
| Byron Generating Station | Byron, Illinois | 20 TWh | Aug 1985 | Mar 2025 | Nuclear |
| Calvert Cliffs Nuclear Power Plant | Lusby, Maryland | 15 TWh | Apr 1975 | Mar 2025 | Nuclear |
| Clinton Power Station | Clinton, Illinois | 10 TWh | Oct 1987 | Mar 2025 | Nuclear |
| Dresden Generating Station | Morris, Illinois | 15 TWh | Jul 1970 | Mar 2025 | Nuclear |
| James A Fitzpatrick | Lycoming, New York | 7 TWh | Jul 1976 | Mar 2025 | Nuclear |
| LaSalle Generating Station | Marseilles, Illinois | 20 TWh | Dec 1983 | Mar 2025 | Nuclear |
| Limerick | Sanatoga, Pennsylvania | 19 TWh | Jan 1986 | Mar 2025 | Nuclear |
| Nine Mile Point Nuclear Station | Lycoming, New York | 16 TWh | Nov 1969 | Mar 2025 | Nuclear |
| Oyster Creek | Forked River, New Jersey | - | Nov 1969 | Sep 2018 | |
| Peach Bottom | Delta, Pennsylvania | 22 TWh | Jun 1974 | Mar 2025 | Nuclear |
| Quad Cities Generating Station | Cordova, Illinois | 15 TWh | Nov 1972 | Mar 2025 | Nuclear |
| R E Ginna Nuclear Power Plant | Ontario, New York | 5 TWh | Jun 1970 | Mar 2025 | Nuclear |
| Three Mile Island | Middletown, Pennsylvania | - | Jul 1974 | Sep 2019 |
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.