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Sizewell B power station

Sizewell B is a nuclear power station on the Suffolk coast. It is the UK’s only Pressurised Water Reactor.

Since 1995 Sizewell B has generated 250 TWh of zero carbon electricity

House icon with power symbol

Enough to power every home in Suffolk for 192 years

CO2 cloud icon

Avoiding 87m tonnes of CO2 emissions*

Like taking 42m cars off UK roads for a year

*when compared to direct emissions of combined cycle gas turbines | all figures rounded to the nearest hundred thousand

About Sizewell B

  • Station Director: Robert Gunn
  • Reactor type: 1 Pressurised Water Reactor
  • Total supply to the national grid: 1198 MW
  • Start of construction: 1988
  • Start of generation: 1995
  • Estimated decommissioning date: 2035
  • People: Approximately 520 full time EDF employees plus over 250 full time contract partners
  • Daily plant status - find out which reactors at our eight nuclear power stations are in service and what they are generating (data updated on weekdays)

Have you ever wondered about nuclear power’s carbon footprint?

A new analysis of Sizewell B’s lifecycle has revealed the carbon impacts are not what you might expect.

Sizewell B from a distance

News from Sizewell B

February 14, 2024

“From honeymooners to Cambridge University students”: Sizewell Visitor Centre passes 100,000 milestone

Following its most successful year since it opened just over a decade ago, The Sizewell Visitor Centre has now passed a major milestone – with over 100,000 visitors coming to the Centre for educational workshops and tours of the Sizewell B nuclear power station.  
Nuclear engineers at Heysham power station
January 09, 2024

Investment boost to maintain UK nuclear output at current levels until at least 2026

EDF plans to invest a further £1.3billion in the UK’s five generating nuclear power stations over 2024-26, taking the total invested in the fleet to nearly £9billion since 2009.
Sizewell B Plant Manager, Adam Anderson and Station Director, Robert Gunn
December 19, 2022

Sizewell B powers on

Visit Sizewell B power station

Sizewell B visitor centre has an interactive exhibition to help visitors learn about nuclear power generation, alongside a classroom facility.

  • Sizewell B is the UK’s only Pressurised Water Reactor (PWR) and the most modern nuclear power station in the UK. 
  • Vistors are advised to allow up to 3 hours for a tour and can be pre-booked for free at least 3 weeks in advance. Minimum age for the station tour is 11 years-old.
  • Trained station guides accompany the tours which include a safety and security briefing and relevant Personal Protective equipment.
  • The plant tour is a walking tour, mostly outdoors, and is 1.65 miles long.

Opening Hours

Monday to Friday: 09:00 - 16.00 hours, except bank holidays.

Frequently asked questions

If you have any questions about the visitor centre, or about taking a tour, please check our FAQs or contact our visitor centre co-ordinator:

Telephone: 01728 653974
Address: Sizewell B power station, near Leiston, Suffolk. IP16 4UR

Contact Sizewell B

EDF Sizewell B power station
Nr Leiston
Suffolk IP16 4UR

+44 (0)1728 653653

Media requests:
Marjorie Barnes
+44 (0)1728 653378

Community requests:
Niki Rousseau
+44 (0)1728 653258


EDF and the Nuclear Decommissioning Authority hold regular joint meetings (Site Stakeholder Group or SSG) with local people, the media, council and emergency services representatives and local politicians to maintain regular communications about the nuclear site. This meeting is independently chaired.

Latest Community Report.

Sizewell C

EDF aims to build a new power station with two reactors located on land next to the current Sizewell B station.

Safety and reporting

Our number one priority is safety. Find out about our ​​​​​​​commitment to Zero Harm.

How we generate our power

As Britain's biggest generator of zero carbon electricity(1) we generate power from wind + nuclear + solar.

Nuclear engineer on site at nuclear power station using tablet

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