3rd largest plant in Pennsylvania · 55th nationally
Limerick is a nuclear power plant in Pennsylvania with a nameplate capacity of 2,277 MW. It generates roughly 19.1M MWh per year — enough to power about 1,818,483 average U.S. homes.
Its capacity factor of 96% means it runs nearly around-the-clock as baseload generation.
| Plant Name | Limerick |
|---|---|
| Operator | Constellation Nuclear |
| City | Sanatoga |
| County | Montgomery County |
| State | Pennsylvania |
| ZIP | 19464 |
| Coordinates | 40.22430, -75.58744 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Nuclear | Uranium | 1,139 MW | Operating | 1986 |
| 2 | Nuclear | Uranium | 1,139 MW | Operating | 1990 |
| NERC Region | RFC |
|---|---|
| Balancing Authority | Pjm Interconnection, Llc |
Nuclear plants generate carbon-free baseload electricity by fissioning uranium fuel inside a reactor. They run nearly around-the-clock — typical capacity factors above 90% — and a single facility can power millions of homes. Spent fuel is stored on-site in dry casks. NRC oversees safety; emergency planning zones extend 10 miles from the reactor.