Arkansas Nuclear One nuclear power plant 1

Name: Arkansas Nuclear One nuclear power plant 1
Address: USA

Gross capacity

903MW

Arkansas Nuclear One nuclear power plant 1 is a pressurised water reactor unit at Arkansas Nuclear One nuclear power plant in United States rated at 903 MW gross. It is operating. Commercial operation began 19 Dec 1974.

Specification

Reactor type	Pressurised water reactor (PWR)
Model	B&W 177-FAB&W LLP (DRYAMB) in the source
Size	Largeabove 300 MWe
Coolant	Light water
Moderator	Light water
Gross capacity	903MW
Net capacity (reference)	836MW
Net capacity (design)	850MW
Thermal output	2,568MWt
NSSS vendor	Babcock & Wilcoxall vendors
Typical enrichment	3–5% U-235

Ownership & location

Site	Arkansas Nuclear One nuclear power plant
Unit	1
Country	United States
Owner	Entergy Arkansas LLC100%
Operator	Entergy Nuclear Operations
Coordinates	35.3110, -93.2351

Live status NRC daily report, unit key "Arkansas Nuclear 1"

Power level

…

Last 90 days

Updated daily from the US reactor status feed. The NRC publishes a power percentage only, with no reason for a reduction, so a unit at 0% may be refuelling, in a planned outage or tripped. See outages.

Fuel chain for this unit

Fuel form

Uranium dioxide pellets in zirconium-alloy cladding

Enrichment

3–5% U-235

Who makes this assembly

China National Nuclear Corporation PWR fuel assemblies
ENUSA Industrias Avanzadas PWR and BWR fuel assemblies
Framatome PWR fuel assemblies
KEPCO Nuclear Fuel PWR fuel assemblies
Mitsubishi Heavy Industries PWR fuel assemblies
Westinghouse Electric Company PWR fuel assemblies

Supply position

United States runs 63 operating units on PWR (square-lattice) fuel. 6 fabricators are documented for it. Westinghouse Electric Company is based in United States. Country exposure

Upstream

Enriched fuel means this unit sits downstream of five conversion plants and four enrichment operators holding 88% of world capacity between the top three.

Rosatom Urenco CNNC Orano

Conversion

AEOI Cameco CNNC CNNC CNNC ConverDyn Orano Rosatom TVEL Westinghouse

Fabricator capability is recorded against reactor type and model line, not against named units, utilities do not publish fuel contracts. See the fuel chain.

Timeline

1 Oct 1968Construction start
6 Aug 1974First criticality
17 Aug 1974Grid connection
19 Dec 1974Commercial operation

Other units at Arkansas Nuclear One nuclear power plant

Unit	Status	Gross MW
Arkansas Nuclear One nuclear power plant 2	Operating	1,065

Other B&W LLP (DRYAMB) units

7 units worldwide share this model designation.

Unit	Country	Status	Gross MW
Oconee nuclear power plant 1	United States	Operating	891
Oconee nuclear power plant 2	United States	Operating	891
Oconee nuclear power plant 3	United States	Operating	900
Crystal River nuclear power plant 3	United States	Retired	890
Three Mile Island nuclear power plant 1	United States	Retired	880
Three Mile Island nuclear power plant Unit 1 Repower	United States	Pre-construction	880

Sources

Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06 · this unit last researched by GEM on 2024-05-24
GEM.wiki entry (further reading) , CC BY-SA 4.0, linked, not quoted

How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data