Winfrith is located on a 84 hectare site in Dorset. It was constructed in the 1950s to enable vital research into reactor design.
The site housed nine experimental reactors at various times with only two remaining today, both of which are being decommissioned.
On this page
Site Owner
Information is presented about wastes that existed at Winfrith 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.
