Top 10 Countries Most Dependent on Nuclear Energy by Electricity Share (2026)

Updated: 2026-08-24
#1

France

Global leader in nuclear power reliance, operating 57 active reactors to supply nearly 70% of its national grid.

68.8% of total electricity
#2

Slovakia

Heavy reliance on nuclear energy powered by the Mochovce and Bohunice plants, maintaining a low-carbon energy mix.

66.4% of total electricity
#3

Ukraine

Relies on nuclear energy for over half of its domestic power generation across key operational facilities like Zaporizhzhia and Rivne.

55.8% of total electricity
#4

Czechia

Generates over 40% of its total electricity using nuclear power from the Dukovany and Temelín power stations.

42.3% of total electricity
#5

Hungary

The Paks Nuclear Power Plant serves as the primary base for the country's national electricity grid.

40.0% of total electricity
#6

Finland

Boosted by the high-capacity Olkiluoto 3 reactor unit, nuclear power provides nearly 40% of Finnish clean power.

39.9% of total electricity
#7

Slovenia

Co-owns the Krško Nuclear Power Plant with Croatia, securing nearly 40% of its domestic electricity consumption.

39.3% of total electricity
#8

Bulgaria

The Kozloduy Nuclear Power Plant produces nearly 40% of the nation's baseline electricity supply.

39.1% of total electricity
#9

Belarus

Rapidly scaled up its national nuclear percentage following the full commissioning of the Ostrovets nuclear plant.

36.6% of total electricity
#10

Belgium

Maintains over a third of its domestic electricity output from active nuclear reactors at Tihange and Doel.

33.1% of total electricity

Frequently Asked Questions

Which country gets the highest percentage of its electricity from nuclear power in 2026?▼

France leads the world in nuclear energy reliance, generating approximately 68.8% of its total domestic electricity from nuclear power plants.

Why do European countries dominate the top nuclear energy reliance rankings?▼

European nations prioritize nuclear power to ensure energy independence, reduce reliance on imported fossil fuels, and meet aggressive EU net-zero carbon reduction targets.

Does the United States have the highest nuclear power percentage in the world?▼

No. While the US produces the highest total volume of nuclear electricity worldwide, nuclear energy accounts for roughly 17-18% of the country's total electricity generation mix.