Sizewell A
Site profile
Sizewell A site, located on the Suffolk heritage coast ended 40 years of safe, compliant electrical generation on 31 December 2006. A number of enabling projects are currently taking place as part of the site's Defuelling and Decommissioning preparations.
During the station’s operational lifetime its twin Magnox reactors produced over 110 TWh of electricity. This is enough to continually supply England and Wales for six months. A typical day’s generation saw the station supply more than 10 million kWh of electricity:- enough to serve the demand of a third of East Anglia.
Immediately to the north of Sizewell A is Britain’s newest nuclear power station Sizewell B, which is operated by British Energy.
At a glance
Location: Suffolk
Nearby towns/cities: Leiston (2 miles), Ipswich (20 miles)
Site area: 10 hectares
Number of current employees: 436
Latest site news
Monday 22 December 2008
Optimising discharges to save costs
Work is underway on Sizewell’s Direct Discharge of Effluent project, which aims to save £500k per year for the NDA through reductions to the site’s energy and maintenance costs. More...Next site stakeholder event
Thursday 05 March 2009
Sizewell Site Stakeholder Group
The next meeting of the Sizewell A and B Site Stakeholder Group. This meeting will be held at Saxmundham Market Hall. Meetings are open to members of the public. For further information visit http://www.sizewellstakeholdergroup.org or contact the SSG secretariat.


