Calvert Cliffs Nuclear Power Plant
Calvert Cliffs Nuclear Power Plant is a nuclear plant in Calvert County, Maryland, operated by Constellation Nuclear. No other power plant in Maryland has more nameplate capacity; the state has 236 in all. Its biggest unit, rated at 932 MW, is the largest single generator in Maryland.
Nameplate capacity, 2025
1,850 MW
1,745 MW net summer capacity
2 operable units
- Nuclear1,850 MW100%
Unit by unit, 1975 to 2025
operating in 2025bar height follows unit size
Unit 1 Nuclear, 918 MW, 1975
Unit 2 Nuclear, 932 MW, 1977
Among Maryland’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Calvert Cliffs Nuclear Power Plantthis plant
- 2Chalk Point Power1,825 MW
- 3Brandon Shores1,370 MW
Other rankings
- All US power plants
- 85th of 14,286
- US nuclear plants
- 28th of 56
- Plants in the PJM Interconnection balancing area
- 21st of 2,049
- Plants run by Constellation Nuclear
- 9th of 13
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Nuclear | 918 MW | 884 MW | 1975 | Operating |
| 2 | Nuclear | 932 MW | 861 MW | 1977 | Operating |
Grid and site
- Balancing area
- PJM Interconnection
- Reliability region
- ReliabilityFirst
- Highest grid connection voltage
- 500 kV
- Water source
- Chesapeake Bay
- Nearest town on record
- Lusby
- Operator type
- Independent producer
- Coordinates
- 38.434°N, 76.442°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Chalk Point Power | Natural gas | 1,825 MW | 15.2 mi northwest |
| NRG Chalk Point CT | Oil and petroleum | 94 MW | 15.2 mi northwest |
| Chesapeake Beach BESS | Battery storage | 1.1 MW | 15.6 mi north |
| UMCES Ground Mount | Solar | 2 MW | 19.5 mi northeast |
| Egypt Road Solar | Solar | 51.1 MW | 19.6 mi east |
| Mustang One | Solar | 1.5 MW | 20.1 mi northeast |
| Herbert Farm Solar | Solar | 5.5 MW | 20.8 mi west |
| Fairhaven | Battery storage | 2.5 MW | 23.5 mi north |