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1850.4 MW Nuclear operating in Calvert, MD
1,850.4 MW
Nameplate Capacity
2
Generators
units
Nuclear
Technology
1975
Operating Since
Coordinates
38.4344, -76.4417
County
Calvert, MD
Nearby Plants
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Request a demo →Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Constellation Nuclear | Exelon Generation | Constellation Energy |
| Owner(s) | Constellation Nuclear | Exelon | — |
| Status | Operating | operating | — |
The Calvert Cliffs Nuclear Power Plant (CCNPP) is a nuclear power plant located on the western shore of the Chesapeake Bay near Lusby, Calvert County, Maryland, in the Mid-Atlantic United States. It is the only nuclear power plant in the state of Maryland.
Read more on WikipediaCalvert Cliffs Nuclear Power Plant is located in Calvert County, Maryland. The plant, owned by Exelon and operated by Constellation Nuclear, has a total capacity of 1850.4 MW across two nuclear reactors. It began operating in 1975 and is the only nuclear power plant in the state of Maryland.
The plant's latest annual generation was 14,795,150 MWh, achieving a capacity factor of 91.3%. Calvert Cliffs is the largest power plant in Maryland and ranks 27th out of 55 nuclear plants nationally. The plant is located within the PJM Interconnection, LLC balancing authority and the RFC NERC region.
Generated from EIA, GEM, and public data sources
ISO/RTO
PJM
Market
ISO/RTO Member
NERC Region
RFC
Balancing Authority
1.3M MWh
Latest Month
14.8M MWh
Annual Generation
91.3%
Capacity Factor
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Request a demo →Market Position
ISO/RTO Market
PJM
LMP Node
CALVERTC22 KV GEN 02
Pricing Hub
WESTERN HUB
Alt. Hub / Zone
DOMINION HUB
Location Type
Generation Node
Node Source
Curated node match
Last updated 2026-03-26
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Request a demoPJM Interconnection, LLC (PJM)
Grid Voltage
500.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP