Uncommon
Nuclear power in the United Kingdom
Nuclear power in the United Kingdom generated 16.1% of the country's electricity in 2020. As of December 2025, the UK has nine operational nuclear reactors at four locations (eight advanced gas-cooled reactors (AGR) and one pressurised water reactor (PWR)), producing 5.9 GWe. It also has nuclear reprocessing plants at Sellafield and the Tails Management Facility (TMF) operated by Urenco in Capenhurst. The United Kingdom established the world's first civil nuclear programme, opening a nuclear power station, Calder Hall at Windscale, England, in 1956. The British installed base of nuclear reactors used to be dominated by domestically developed Magnox and their successor AGR reactors with graphite moderator and CO2 coolant but the last of those are nearing the end of their useful life and will be replaced with "international" PWR designs. At the peak in 1997, 26% of the nation's electricity was generated from nuclear power. Since then several reactors have closed and by 2012 the share had...
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