Byron Generating Station
Nuclear power plant in Ogle County, Illinois. 2,449.8 MW of nameplate capacity across 2 generators, operated by Constellation Nuclear.
Also known as Byron Nuclear Power Plant · EIA plant 6023
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Key facts
- Capacity
- 2,449.8 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- September 1985First generator online
- Operator
- Constellation NuclearEIA operator ID 55951
- Grid
- PJMBalancing authority PJM
- Price nodes
- 2 PJM nodesResource nodes with prices
- Location
- Ogle County, IL42.0742, −89.2819
- EIA plant ID
- 6023EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Byron produces
Free · EIA-923Net generation, 2025
19.9 TWh
19,914,452 MWh, final
Capacity factor, 2025
92.8%
2024: 92.2%
January to July 2026
11.1 TWh
Provisional
Range, 2015 to 2025
19.1–20.1
TWh a year. Low 2017, high 2019
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 19,297,240 | Not reported | 12 of 12 |
| 2001 | 20,088,482 | Not reported | 12 of 12 |
| 2002 | 19,365,469 | Not reported | 12 of 12 |
| 2003 | 20,142,252 | Not reported | 12 of 12 |
| 2004 | 20,004,564 | Not reported | 12 of 12 |
| 2005 | 19,119,557 | Not reported | 12 of 12 |
| 2006 | 19,491,771 | Not reported | 12 of 12 |
| 2007 | 18,852,767 | Not reported | 12 of 12 |
| 2008 | 19,357,526 | Not reported | 12 of 12 |
| 2009 | 19,718,273 | Not reported | 12 of 12 |
| 2010 | 19,855,712 | 92.5% | 12 of 12 |
| 2011 | 18,202,495 | 84.8% | 12 of 12 |
| 2012 | 18,318,278 | 85.1% | 12 of 12 |
| 2013 | 19,547,061 | 91.1% | 12 of 12 |
| 2014 | 19,252,381 | 89.7% | 12 of 12 |
| 2015 | 19,471,413 | 90.7% | 12 of 12 |
| 2016 | 19,600,248 | 91.1% | 12 of 12 |
| 2017 | 19,144,044 | 89.2% | 12 of 12 |
| 2018 | 20,051,023 | 93.4% | 12 of 12 |
| 2019 | 20,117,981 | 93.7% | 12 of 12 |
| 2020 | 19,524,894 | 90.7% | 12 of 12 |
| 2021 | 19,969,652 | 93.1% | 12 of 12 |
| 2022 | 19,741,756 | 92.0% | 12 of 12 |
| 2023 | 19,465,588 | 90.7% | 12 of 12 |
| 2024 | 19,848,713 | 92.2% | 12 of 12 |
| 2025 | 19,914,452 | 92.8% | 12 of 12 |
| 2026 (provisional, partial year) | 11,052,952 | 88.7% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · PJMEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
21,612
million gallons
Consumption, 2024
14,887
million gallons
Source
Rock River
Surface, Fresh. Natural-draft tower
Watershed stress
Very low/none · 0.148
USGS SUI, HUC12 Silver Creek-Rock River
12 of 12 cooling months report withdrawal. SUI of the source river HUC12 within 3 km. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Nuclear | 1,224.9 | September 1985 |
| 2 | Nuclear | 1,224.9 | August 1987 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Constellation Nuclear as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Byron
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Questions about Byron
How much power does Byron Generating Station produce?
Byron Generating Station reported 19,914,452 MWh (19.9 TWh) of net generation in 2025, a 92.8% capacity factor on 2,449.8 MW of nameplate capacity. From January to July 2026 it reported 11.1 TWh, which is provisional.
Where is Byron Generating Station?
Byron Generating Station is in Ogle County, Illinois, at 42.0742, −89.2819. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Byron Generating Station?
EIA-860M for August 2026 lists Constellation Nuclear as the operator (EIA operator ID 55951). The operator is not always the owner.
When did Byron Generating Station start operating?
Its first generator began operating in September 1985, according to EIA-860M.
Does InfraMap have power prices for Byron Generating Station?
Yes. InfraMap has PJM day-ahead and real-time prices at 2 price nodes linked to Byron Generating Station, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page