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How Many Nuclear Power Stations Are There in the UK?
The United Kingdom has a long history of nuclear energy development, dating back to the mid-20th century. Nuclear power plays a crucial role in the UK’s energy strategy, especially as the country pursues decarbonization goals. So, how many nuclear power stations are currently operating in the UK, and what does the future hold?
Current Operational Nuclear Power Stations
As of 2025, the UK operates 9 nuclear reactors at 5 power stations. These reactors generate approximately 15% of the country’s electricity, offering a low-carbon and stable energy source.
Here are the operational stations:
Sizewell B – Suffolk (1 reactor)
Heysham 1 and 2 – Lancashire (4 reactors in total)
Hartlepool – County Durham (2 reactors)
Torness – East Lothian, Scotland (2 reactors)
The only Pressurized Water Reactor (PWR) in the UK is at Sizewell B; the others are Advanced Gas-cooled Reactors (AGRs).
Reactors Being Decommissioned
Several older stations have been shut down or are being phased out, including:
Hunterston B – Closed in 2022
Hinkley Point B – Ceased operations in 2022
Dungeness B – Retired in 2021
The AGR fleet is aging, and most are expected to be fully shut down by the end of the 2020s.
New Projects Under Development
To maintain and grow nuclear capacity, the UK government has approved new nuclear projects:
Hinkley Point C – Under construction in Somerset, with two EPR reactors expected online by 2027.
Sizewell C – Planned next to Sizewell B, with similar design to Hinkley Point C.
Small Modular Reactors (SMRs) – The UK is heavily investing in SMRs, led by companies like Rolls-Royce.
These efforts aim to replace aging infrastructure and support energy security.
Nuclear’s Role in the UK Energy Mix
The UK’s commitment to achieving net-zero carbon emissions by 2050 positions nuclear energy as a vital component:
Stable Output: Complements intermittent renewables like wind and solar.
Energy Security: Reduces reliance on imported fossil fuels.
Low Emissions: Helps meet climate targets with consistent, clean energy.
Policy and Public Sentiment
Nuclear energy has historically received mixed public opinions in the UK, influenced by past accidents and cost concerns. However:
Government funding, regulatory support, and technological innovation are shaping a more favorable landscape for nuclear investment.
Conclusion
As of 2025, the UK operates 5 nuclear power stations with 9 reactors. While some aging facilities are being retired, new projects like Hinkley Point C and Sizewell C aim to rejuvenate the sector. Alongside advances in SMRs, the UK’s nuclear future looks strategically aligned with its carbon-neutral goals.
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