Nuclear power produces nearly 40% of the electricity used in Finland.

Omissions

• The exact share varies slightly by year and by metric: 38% of electricity demand in 2024 (Statistics Finland), 37.6% of electricity consumed in 2024 (TVO), and about 37% of electricity production in 2025 (Finnish government/Treasury), so 'nearly 40%' is a rounded approximation that sits marginally above the most recent annual figure.
• The claim conflates 'electricity used/consumed' (demand) with 'electricity generated/produced'; nuclear's share is essentially the same on both bases because Finland's generation and consumption are close, but the two are not identical concepts.
• The 'about 50 years' element refers to Finland's reliance on nuclear power since Olkiluoto 1 and 2 began commercial operation in 1978–1980 (about 47 years by 2026), a reasonable rounding.

Sources

• PrimaryStatistics Finland (Tilastokeskus) – Altogether 95 per cent of Finland's electricity production was fossil-freeNuclear power covered most of Finland's electricity demand, 38 per cent. Total electricity consumption rose by three per cent.
• PrimaryEurostat – Nuclear power production increased by 4.8% in 2024Finland (32 599 GWh; 5.0%). In Hungary, Bulgaria, Belgium, Finland and Czechia, around 40% of all electricity generated was nuclear.
• PrimaryTreasury Finland (Valtiokonttori) – Energy transition data and factsIn 2025, the majority (37%) of electricity production was based on nuclear power. Greenhouse gas emissions are steadily decreasing.
• SecondaryTeollisuuden Voima (TVO) – The statistics have it: in Finland, nuclear power meets 37.6% of our electricity needsIn terms of percentages, 37,6 % of all electricity consumed in Finland last year came from nuclear power plants.