Sizewell A is located near Leiston in Suffolk and is a twin reactor site. The site became fully operational in 1966 and shut down on 31 December 2006 after 40 years of safe, compliant generation. The site is currently decommissioning.
Sizewell A is one of three Magnox sites which has a neighbouring site. The three neighbouring EDF AGR sites, along with four other EDF AGR sites, are due to transfer to Magnox.
Bradwell’s care and maintenance phase is being managed by Sizewell A. The team conducts annual inspections at Bradwell and maintains a 24-hour security presence on site.
On this page
Site Owner
Information is presented about wastes that existed at Sizewell A at the stock date (1 April 2025) and were forecast to arise after this date.
For background information about this site owner, please refer to the Site Information Sheets in the 2025 UK Radioactive Waste Inventory report.
The following page presents information about radioactive wastes at the specific site selected.
Information about spent fuel and nuclear materials is presented separately in the relevant 2025 Inventory report. For official figures and essential information about how the data has been produced, always refer to the UKRWI 2025 published reports.
From Amersham and AWE Aldermaston to Winfrith and Wylfa – you can source site-by-site
waste inventory data from sites across the UK nuclear industry here.
