Limerick
Nuclear power plant · Montgomery County, Pennsylvania
Details
- Primary fuel
- Nuclear
- Technology
- Nuclear
- Operator
- Constellation Nuclear
- County
- Montgomery County
- Generating units
- 2
- Share of state capacity
- 4.29%
- Rank among nuclear plants in Pennsylvania
- #3 of 5
- EIA plant code
- 6105
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Nuclear | 1,139 MW | 1,120 MW | 1986 | Operating |
| 2 | Nuclear | 1,139 MW | 1,122 MW | 1990 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Pennsylvania
| Peach Bottom | Nuclear | 2,876 MW |
| TalenEnergy Susquehanna | Nuclear | 2,532 MW |
| Conemaugh | Coal | 1,963 MW |
| Keystone | Coal | 1,883 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 2,277 MW solar plant and a 2,277 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Pennsylvania power plants · What Pennsylvania actually generates