Limerick
Montgomery County, Pennsylvania · EIA plant ID 6105 · Operator: Exelon Nuclear
Nameplate2,277MWSummer 2,242 MW
Generators2in service
Net generation19,337GWh12 mo to Aug 2026
Capacity factor98%nuclear units, summer MW
Heat rate—thermal plants only
First online1986
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), nuclear units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 19,376.5 | 96.8% | — |
| 2002 | 19,296.3 | 97.1% | — |
| 2003 | 19,400.3 | 97.7% | — |
| 2004 | 19,349.5 | 97.1% | — |
| 2005 | 18,905.9 | 95.2% | — |
| 2006 | 19,197.2 | 96.6% | — |
| 2007 | 19,053.5 | 95.9% | — |
| 2008 | 19,047.3 | 95.8% | — |
| 2009 | 19,330.8 | 97.5% | — |
| 2010 | 18,926.1 | 95.4% | — |
| 2011 | 18,462.5 | 91.8% | — |
| 2012 | 18,155.6 | 90.0% | — |
| 2013 | 19,542.1 | 97.2% | — |
| 2014 | 19,077.2 | 97.1% | — |
| 2015 | 18,931.4 | 96.4% | — |
| 2016 | 19,395.4 | 98.5% | — |
| 2017 | 18,553 | 94.5% | — |
| 2018 | 19,338.6 | 98.5% | — |
| 2019 | 19,345.6 | 98.5% | — |
| 2020 | 19,344.8 | 98.2% | — |
| 2021 | 19,309.3 | 98.3% | — |
| 2022 | 19,167.2 | 97.6% | — |
| 2023 | 19,094.1 | 97.2% | — |
| 2024 | 19,360.3 | 98.3% | — |
| 2025 | 19,454.3 | 99.1% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Nuclear | ST | 1,138.5 | 1,119.7 | Feb 1986 | Operating | — | coming soon |
| 2 | Nuclear | ST | 1,138.5 | 1,122.1 | Jan 1990 | Operating | — | coming soon |
Owner / operator
Operator: Exelon Nuclear. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Exelon Nuclear | 100.0% | 2,277 MW |
Nearby plants
Within 80 km.
| Moser Generating Station | 64 MW | 3 km |
| Pickering Solar | 2 MW | 14.3 km |
| Birdsboro Power | 525 MW | 18.7 km |
| Pioneer Crossing Energy, LLC | 8 MW | 20.3 km |
| North Wales Diesel | retired | 23.1 km |
| West Point (PA) | 91 MW | 24.5 km |