Arkansas Nuclear One
Nuclear power plant in Pope County, Arkansas. 1,845 MW of nameplate capacity across 2 generators, operated by Entergy Arkansas LLC.
Also known as EIA plant 8055
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1,845 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- December 1974First generator online
- Operator
- Entergy Arkansas LLCEIA operator ID 814
- Grid
- MISOBalancing authority MISO
- Price nodes
- 2 MISO nodesResource nodes with prices
- Location
- Pope County, AR35.3110, −93.2351
- EIA plant ID
- 8055EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Arkansas Nuclear One produces
Free · EIA-923Net generation, 2025
15.2 TWh
15,193,050 MWh, final
Capacity factor, 2025
94.0%
2024: 91.1%
January to July 2026
8.20 TWh
Provisional
Range, 2015 to 2025
12.7–15.2
TWh a year. Low 2017, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 11,651,772 | Not reported | 12 of 12 |
| 2001 | 14,780,789 | Not reported | 12 of 12 |
| 2002 | 14,558,884 | Not reported | 12 of 12 |
| 2003 | 14,689,416 | Not reported | 12 of 12 |
| 2004 | 15,449,851 | Not reported | 12 of 12 |
| 2005 | 13,689,571 | Not reported | 12 of 12 |
| 2006 | 15,232,577 | Not reported | 12 of 12 |
| 2007 | 15,486,102 | Not reported | 12 of 12 |
| 2008 | 14,168,091 | Not reported | 12 of 12 |
| 2009 | 15,169,966 | Not reported | 12 of 12 |
| 2010 | 15,022,678 | 92.9% | 12 of 12 |
| 2011 | 14,194,445 | 87.8% | 12 of 12 |
| 2012 | 15,493,131 | 95.6% | 12 of 12 |
| 2013 | 11,945,257 | 73.9% | 12 of 12 |
| 2014 | 14,478,259 | 89.6% | 12 of 12 |
| 2015 | 13,837,794 | 85.6% | 12 of 12 |
| 2016 | 13,421,022 | 82.8% | 12 of 12 |
| 2017 | 12,691,079 | 78.5% | 12 of 12 |
| 2018 | 12,720,818 | 78.7% | 12 of 12 |
| 2019 | 13,574,947 | 84.0% | 12 of 12 |
| 2020 | 15,063,049 | 92.9% | 12 of 12 |
| 2021 | 13,555,684 | 83.9% | 12 of 12 |
| 2022 | 14,323,697 | 88.6% | 12 of 12 |
| 2023 | 14,972,481 | 92.6% | 12 of 12 |
| 2024 | 14,762,779 | 91.1% | 12 of 12 |
| 2025 | 15,193,050 | 94.0% | 12 of 12 |
| 2026 (provisional, partial year) | 8,201,523 | 87.4% | 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 · MISOEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
368,618
million gallons
Consumption, 2024
5,519
million gallons
Source
Lake Dardanelle; Lake Dardenelle
Surface, Fresh. Once-through
Watershed stress
Low · 0.392
USGS SUI, HUC12 Round Mountain-Lake Dardanelle
24 of 24 cooling months report withdrawal. SUI of the HUC12 containing the plant. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Nuclear | 902.5 | December 1974 |
| 2 | Nuclear | 942.5 | March 1980 |
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 Entergy Arkansas LLC 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 Arkansas Nuclear One
More plants operated by Entergy Arkansas LLC
Questions about Arkansas Nuclear One
How much power does Arkansas Nuclear One produce?
Arkansas Nuclear One reported 15,193,050 MWh (15.2 TWh) of net generation in 2025, a 94.0% capacity factor on 1,845 MW of nameplate capacity. From January to July 2026 it reported 8.20 TWh, which is provisional.
Where is Arkansas Nuclear One?
Arkansas Nuclear One is in Pope County, Arkansas, at 35.3110, −93.2351. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Arkansas Nuclear One?
EIA-860M for August 2026 lists Entergy Arkansas LLC as the operator (EIA operator ID 814). The operator is not always the owner.
When did Arkansas Nuclear One start operating?
Its first generator began operating in December 1974, according to EIA-860M.
Does InfraMap have power prices for Arkansas Nuclear One?
Yes. InfraMap has MISO day-ahead and real-time prices at 2 price nodes linked to Arkansas Nuclear One, 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)
- MISO 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
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page