Limerick — Plant Summary
- EIA Plant ID
- 6105
- Capacity
- 2277 MW
- Primary Fuel
- Nuclear
- Technology
- Nuclear
- Status
- Operating
- Location
- Montgomery, PA
- Operating Since
- 1986
- Generators
- 2
- Operator
- Constellation Nuclear
- Parent Company
- Exelon
- Annual Generation
- 19,454,276 MWh
- Capacity Factor
- 96.4%
- Balancing Authority
- PJM Interconnection, LLC
- ISO/RTO
- PJM
- NERC Region
- RFC
Limerick
OperatingNuclear
Ranked #3 of 5 Nuclear plants in PA#20 of 57 nationally
2277 MW Nuclear operating in Montgomery, PA — PJM Interconnection, LLC
EIAGEMWD
2,277 MW
Nameplate Capacity
2
Generators
units
Nuclear
Technology
1986
Operating Since
Location
Coordinates
40.2243, -75.5874
County
Montgomery, PA
Nearby Plants
- Moser Generating StationDistillate Oil63.6 MW · 3.0 km
- Pickering SolarSolar1.5 MW · 14.3 km
- Birdsboro PowerNatural Gas525 MW · 18.8 km
Ownership & Operator
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 | Exelon |
| Owner(s) | Constellation Nuclear | Exelon | — |
| Status | Operating | operating | — |
Ownership Chain
About
The Limerick Generating Station, branded as the Limerick Clean Energy Center (LCEC), is a nuclear power plant located next to the Schuylkill River in Limerick Township, Montgomery County, Pennsylvania, approximately 29 miles (47 km) northwest of Center City, Philadelphia. The facility has two General Electric boiling water reactor (BWR) units, cooled by natural draft cooling towers. According to its owner, Constellation Energy, the two units are capable of producing 2,317 megawatts of power, which combined would provide electricity to around 2 million households. Constellation owns and operates this facility following their separation from Exelon Corporation in 2022. With the exception of refueling outages, Limerick Generating Station continuously operates at 100% power. The plant is connected to the grid, and transmits power, via multiple 500kv transmission lines.
Read more on WikipediaLimerick Generating Station is a 2,277 MW nuclear power plant located in Montgomery County, Pennsylvania. The plant, which began operating in 1986, is owned by Exelon and operated by Constellation Nuclear. It consists of two nuclear reactors and ranks as the third-largest power plant in Pennsylvania (out of 5) and the 19th-largest nuclear plant nationally (out of 55).
Limerick operates within the PJM Interconnection market and balancing authority, and is part of the RFC NERC region. The plant's primary fuel source is nuclear (NUC). In the most recent year with available data, Limerick generated 19,454,276 MWh of electricity, achieving a capacity factor of 96.4%.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC
Grid Voltage
500 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
1.8M MWh
Latest Month
19.5M MWh
Annual Generation
96.4%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Limerick 230 kV Substation · 230 kV
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
PJM
LMP Node
20021101
Pricing Hub
WESTERN HUB
Node Source
EIA-860 direct report
News & Articles (10)Beta
Regulatory·ferc order
Nuclear Regulatory Commission Approves Limerick Nuclear Power Plant Digital Modernization Plan For Safety, Diagnostic Systems; Data Center Proposed Next Door
On January 6, Constellation Energy announced the U.S. Nuclear Regulatory Commission (NRC) has approved a License Amendment Request for the...
Nuclear Regulatory Commission (regulator)NRC (regulator)
PA Environment Digest Blog·4 weeks ago
General
Nuclear Regulatory Commission Approves Limerick Nuclear Power Plant Digital Modernization Plan For Safety, Diagnostic Systems; Data Center Proposed Next Door
On January 6, Constellation Energy announced the U.S. Nuclear Regulatory Commission (NRC) has approved a License Amendment Request for the...
PA Environment Digest Blog·4 weeks ago
General
1.4 million sq ft data center campus planned outside Philadelphia, Pennsylvania
Proposed campus within spitting distance of Limerick nuclear power station.
Data Center Dynamics·2 months ago
General
NRC OKs I&C upgrade for Limerick
The Nuclear Regulatory Commission has amended the operating licenses of the two boiling water reactors at Constellation Energy's Limerick...
American Nuclear Society -- ANS·2 months ago
Last updated 2026-03-26
View all 10 articles