Arkansas Nuclear One

Arkansas Nuclear One — 1,845 MW nuclear plant, AR · Ask the Grid

Generation and physical site

EIA plant 8055 · Inventory for Aug 2026.

Reported operating nameplate by technology

Nuclear: 1,845 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (2)

EIA generator status and nameplate capacity for Arkansas Nuclear One
Generator	Technology	Status	Power (MW)	Energy (MWh)
1	Nuclear	Operating	902.5	Unknown
2	Nuclear	Operating	942.5	Unknown

Physical map location · OpenStreetMap: 35.31359, -93.23153
Filed location · EIA: 35.31100, -93.23510

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Aug 2026
EIA retrieved: Oct 10, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: Apr 2, 2024
Map prepared: Oct 10, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
1	902.5 MW 825.5 MW summer	Nuclear Nuclear · ST	Dec 1974	Operating
2	942.5 MW 981.5 MW summer	Nuclear Nuclear · ST	Mar 1980	Operating

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

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AssetEquipment

Parties and identifiers

OrganizationRoleBasis

Entergy Arkansas, LLCOwnerowner

Entergy CorporationParent companyultimate parent

Babcock & WilcoxEquipment supplier

Reporting portfolio

EIA reporting entity

Entergy Arkansas LLC

Entity 814

Operating portfolio

11 plants

1 states

Reported capacity

9,635.3 MW

Conventional Hydroelectric · Conventional Steam Coal · Natural Gas Fired Combined Cycle

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Union Power Station	2,428 MW	AR
Arkansas Nuclear OneCurrent	1,845 MW	AR
Independence Steam Electric Station	1,800 MW	AR
White Bluff	1,800 MW	AR
Hot Spring Generating Facility	714.8 MW	AR
Lake Catherine	552.5 MW	AR

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Dec 1974
Dec 1974
Generator enters operationEIA-860
EIA-860 lists generator 1 with this operating date.
Mar 1980
Mar 1980
Generator enters operationEIA-860
EIA-860 lists generator 2 with this operating date.
Jun 20, 2001
Jun 20, 2001
Arkansas Nuclear One Unit 1 license renewednrc.gov
Unit 1's initial operating license was renewed by the NRC; now expires May 20, 2034
May 1, 2002
May 1, 2002
Arkansas Nuclear One Unit 2 power uprate approvednrc.gov
NRC approved a 7.5% uprate (64 MW), increasing Unit 2 generating capacity to 922 MW at time of approval; Entergy's current maximum dependable capacity remains 988 MW
Jun 30, 2005
Jun 30, 2005
Arkansas Nuclear One Unit 2 license renewednrc.gov
Unit 2's initial operating license was renewed by the NRC; now expires July 17, 2038
Dec 19, 2013
Dec 19, 2013
Arkansas Nuclear One integrated into MISOentergy.com
Entergy Arkansas utility operating companies completed integration of their transmission system into the Midcontinent Independent System Operator (MISO)

Sources

PublisherReferenceType

U.S. Energy Information AdministrationEIA-860 generator inventoryFederal registry

U.S. Energy Information AdministrationEIA-923 generation filingsFederal filing

entergy.comentergy.compublic_source

Common questions about Arkansas Nuclear One

Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.

How big is Arkansas Nuclear One?

Arkansas Nuclear One reports 1,845 MW nuclear of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.

What kind of plant is Arkansas Nuclear One?

Arkansas Nuclear One is a nuclear facility in Pope County, AR, participating in the MISO market.

Where is Arkansas Nuclear One located?

Arkansas Nuclear One is in Pope County, AR, inside the MISO balancing area.

Who operates Arkansas Nuclear One?

Arkansas Nuclear One is operated by Entergy Arkansas LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Arkansas Nuclear One generate?

Arkansas Nuclear One reported 14,083 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.

How does Arkansas Nuclear One compare to other plants?

By capacity, Arkansas Nuclear One ranks #30 of 54 operating plants of the same technology nationally. It ranks #1 of 1 in AR.

Overview

Infrastructure record

Arkansas Nuclear One

Overview

Infrastructure record

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Structured profile

Generation and physical site

Reported operating nameplate by technology

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