Byron Generating Station
Ogle County, Illinois · EIA plant ID 6023 · Operator: Exelon Nuclear
Nameplate2,450MWSummer 2,300 MW
Generators2in service
Net generation19,665GWh12 mo to Aug 2026
Capacity factor98%nuclear units, summer MW
Heat rate—thermal plants only
First online1985
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 | 20,088.5 | 96.0% | — |
| 2002 | 19,365.5 | 93.8% | — |
| 2003 | 20,142.3 | 97.6% | — |
| 2004 | 20,004.6 | 99.0% | — |
| 2005 | 19,119.6 | 94.9% | — |
| 2006 | 19,491.8 | 96.7% | — |
| 2007 | 18,852.8 | 93.6% | — |
| 2008 | 19,357.5 | 95.8% | — |
| 2009 | 19,718.3 | 97.9% | — |
| 2010 | 19,855.7 | 98.6% | — |
| 2011 | 18,202.5 | 90.3% | — |
| 2012 | 18,318.3 | 90.7% | — |
| 2013 | 19,547.1 | 97.0% | — |
| 2014 | 19,252.4 | 95.5% | — |
| 2015 | 19,471.4 | 96.6% | — |
| 2016 | 19,600.2 | 97.0% | — |
| 2017 | 19,144 | 95.0% | — |
| 2018 | 20,051 | 99.5% | — |
| 2019 | 20,118 | 99.9% | — |
| 2020 | 19,524.9 | 96.6% | — |
| 2021 | 19,969.7 | 99.1% | — |
| 2022 | 19,741.8 | 98.0% | — |
| 2023 | 19,465.6 | 96.6% | — |
| 2024 | 19,848.7 | 98.3% | — |
| 2025 | 19,914.5 | 98.8% | — |
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 | 1,224.9 | 1,164 | Sep 1985 | Operating | — | coming soon |
| 2 | Nuclear | ST | 1,224.9 | 1,136 | Aug 1987 | 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% | 2,450 MW |
Nearby plants
Within 80 km.
| USS Ducks Solar CSG | 5 MW | 8.8 km |
| OE IL Solar 3 | 2 MW | 9 km |
| CSG Mt. Morris 2, LLC | 2 MW | 12.5 km |
| SV CSG Mt Morris 3 LLC | 2 MW | 12.9 km |
| DG Harlem Solar | 2 MW | 15.4 km |
| Mt. Morris Solar CSG | 2 MW | 17.7 km |