World Power Plants

Sizewell B Nuclear Power Station1,195 MW Nuclear

NuclearVerified: Feb 2026

Sizewell B Nuclear Power Station stands as a cornerstone of the United Kingdom's energy generation framework, offering a robust capacity of 1195 MW through its nuclear technology since its commissioning in 1995. Located at coordinates 52.2144, 1.6189, this plant is positioned on the Suffolk coast, strategically contributing to the energy needs of the eastern region of England. Operated by EDF Energy, Sizewell B is the only pressurized water reactor (PWR) in the UK, leveraging advanced nuclear technology to provide low-carbon electricity, which plays a critical role in the country’s efforts to reduce greenhouse gas emissions. The plant's significance extends beyond mere power generation; it is integral to the UK's commitment to energy security, helping to diversify the energy mix while minimizing reliance on fossil fuels. Sizewell B not only supports the local grid but also contributes to the national objective of achieving a sustainable energy future. As the UK seeks to transition to more renewable sources, Sizewell B exemplifies the importance of maintaining a stable baseload capacity through nuclear power, ensuring that the energy demands of the population are met consistently. This facility is a testament to the UK's approach to harnessing nuclear energy as a reliable and carbon-efficient solution, essential for both current and future energy strategies.

Capacity
1,195 MW

1.20 GW

Commissioning Year
1995

31 years old

Owner
EDF Energy
Location
52.2144°, 1.6189°

United Kingdom, Europe

Context & rankings
  • 33. largest of 3,024 plants in United Kingdom
  • #2,070 worldwide by installed capacity
  • #302 of 514 Nuclear plants worldwide
  • 0.77% of the installed capacity of United Kingdom
Age & fleet comparison

31 years in operation

Nuclear fleet average: 38.1 years

Operator portfolio

EDF Energy operates 15 plants totalling 12,629 MW

Regional density

170 plants within 100 km, 6,469 MW combined

Nearest plant: Reydon Farm (resubmission) (14.1 km)

Data provenance

Location

Coordinates:: 52.214397, 1.618894
Open in Google Maps
Carbon Footprint

Zero Direct Emissions

Sizewell B Nuclear Power Station is a nuclear power plant producing approximately 8898 GWh of clean electricity per year with zero direct CO₂ emissions during operation.

Lifecycle emissions: ~12 g CO₂/kWh (manufacturing, transport, decommissioning)

Technical Details

Primary Fuel Type
Nuclear
Energy Source
Non-Renewable
Country
United Kingdom
Continent
Europe
Data Source
Global Power Plant Database

Overview of Sizewell B Nuclear Power Station in the United Kingdom

Sizewell B Nuclear Power Station, located on the Suffolk coast in the United Kingdom, is a significant contribution to the country's energy landscape. With a capacity of 1195 megawatts (MW), it stands as the only pressurized water reactor (PWR) operating in the UK. Commissioned in 1995 and owned by EDF Energy, Sizewell B plays a crucial role in providing low-carbon electricity, helping to meet the energy demands of millions of households and businesses across the nation. As part of the UK's strategy to transition towards more sustainable energy sources, nuclear power facilities like Sizewell B are essential in maintaining a stable and reliable energy supply while reducing greenhouse gas emissions.

The technical aspects of Sizewell B are particularly noteworthy. The plant utilizes nuclear fuel, specifically enriched uranium, which undergoes fission reactions to generate heat. This heat is then used to produce steam that drives turbines, ultimately generating electricity. The PWR technology employed at Sizewell B ensures high thermal efficiency and safety, featuring advanced systems designed to contain radioactive materials and manage operational risks. The reactor's design includes multiple safety barriers, making it one of the more secure forms of energy generation available today.

In terms of environmental impact, Sizewell B offers a low-carbon alternative to fossil fuel-based power plants. Nuclear power is recognized for its ability to generate large amounts of energy with minimal air pollutants and carbon emissions. However, the operation of nuclear reactors does produce radioactive waste, which necessitates careful management and long-term storage solutions to mitigate potential environmental and health risks. EDF Energy has committed to managing this waste responsibly, ensuring that safety protocols are strictly followed.

Regionally, Sizewell B holds significant importance, not only as an energy provider but also as a local economic driver. The facility creates numerous jobs and supports local businesses through its operational and maintenance activities. Additionally, the presence of the power station contributes to the region's energy infrastructure, making Suffolk a vital area in the UK's nuclear energy landscape. The plant also serves as a focal point for discussions around energy policy, sustainability, and the future of nuclear power in the UK as the country navigates its energy transition towards a greener future.

Overall, Sizewell B Nuclear Power Station exemplifies the dual role of nuclear energy in providing reliable electricity while addressing environmental concerns. Its continued operation and maintenance are critical for supporting the UK's energy goals and ensuring a stable energy supply for the future.

United KingdomEnergy Profile

3,024
Total Plants
155.3 GW
Total Capacity
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