Peach Bottom
York County, Pennsylvania · EIA plant ID 3166 · Operator: Exelon Nuclear
Nameplate2,876MWSummer 2,549 MW
Generators2in service
Net generation21,939GWh12 mo to Aug 2026
Capacity factor98%nuclear units, summer MW
Heat rate—thermal plants only
First online1974
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 | 17,893.7 | 93.4% | — |
| 2002 | 18,486.3 | 96.5% | — |
| 2003 | 18,184.7 | 93.3% | — |
| 2004 | 18,819.4 | 96.3% | — |
| 2005 | 18,393.5 | 94.4% | — |
| 2006 | 18,932.7 | 97.2% | — |
| 2007 | 18,898.7 | 97.0% | — |
| 2008 | 18,534.8 | 94.9% | — |
| 2009 | 18,609.8 | 95.1% | — |
| 2010 | 18,759.4 | 95.4% | — |
| 2011 | 18,824.9 | 95.8% | — |
| 2012 | 18,806 | 95.1% | — |
| 2013 | 18,834.5 | 95.5% | — |
| 2014 | 18,771.2 | 95.6% | — |
| 2015 | 19,858.3 | 96.6% | — |
| 2016 | 21,875.4 | 101.6% | — |
| 2017 | 21,722.5 | 101.2% | — |
| 2018 | 21,680.1 | 101.0% | — |
| 2019 | 22,294.4 | 99.8% | — |
| 2020 | 21,792.3 | 97.3% | — |
| 2021 | 22,268.2 | 99.7% | — |
| 2022 | 22,183.8 | 99.3% | — |
| 2023 | 22,197.1 | 99.4% | — |
| 2024 | 21,838.9 | 97.5% | — |
| 2025 | 21,944 | 98.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 2 | Nuclear | ST | 1,499.4 | 1,264.7 | Jul 1974 | Operating | — | coming soon |
| 3 | Nuclear | ST | 1,377 | 1,284.7 | Dec 1974 | 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).
| Constellation Nuclear | 50.0% | 1,438 MW |
| Public Service Elec & Gas Co | 50.0% | 1,438 MW |
Nearby plants
Within 80 km.
| York Energy Center | 1,449 MW | 4 km |
| Muddy Run | 1,072 MW | 6 km |
| PPL Holtwood | 247 MW | 9.3 km |
| Wildcat Point Generation Facility | 1,114 MW | 10.2 km |
| NAEA Rock Springs LLC | 796 MW | 10.3 km |
| Keystone Solar | 5 MW | 12.1 km |