Entergy Arkansas, LLC - Pope County - MISO
Arkansas Nuclear One is an operating two-unit nuclear station near Russellville with 1,845 MW of EIA nameplate capacity. Entergy Arkansas owns the station, and Entergy Operations operates it under unit licenses that expire in 2034 and 2038. The units entered service in 1974 and 1980 and connect at 500 kV.
Answers use this researched asset profile with live MISO data. Ask about ownership, equipment, project history, or current grid context.
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Canonical EIA plant baseline.
plant-8055
Similar plants ranked by technology, capacity, and distance.
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 |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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| 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 | |
Project milestones and public references behind the asset profile.
EIA-860 lists generator 1 with this operating date.
EIA-860 lists generator 2 with this operating date.
Unit 1's initial operating license was renewed by the NRC; now expires May 20, 2034
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
Unit 2's initial operating license was renewed by the NRC; now expires July 17, 2038
Entergy Arkansas utility operating companies completed integration of their transmission system into the Midcontinent Independent System Operator (MISO)
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Arkansas Nuclear One has a reported capacity of 1,845 MW. Source: EIA Form 860M.
Arkansas Nuclear One is a nuclear facility in Pope County, AR, participating in the MISO market.
Arkansas Nuclear One is in Pope County, AR, inside the MISO balancing area.
Arkansas Nuclear One is operated by Entergy Arkansas LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Arkansas Nuclear One reported 14,124.1 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.
By capacity, Arkansas Nuclear One ranks #30 of 54 operating plants of the same technology nationally. It ranks #1 of 1 in AR.
Nuclear · 1,199.8 MW
St Charles County
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.