Wylfa
Wylfa is located on a 50 hectare site on the north coast of Anglesey between Amlwch and Holyhead, Wylfa was the final Magnox plant to be built with an original design capacity of 1140MW. This design was the precursor to the next generation Advanced Gas Cooled Reactor (AGR) fleet.
During their generating life, the two reactors produced 232 terawatt-hours of electricity, enough to meet the daily needs of 1 million UK households. When Wylfa finished generating on 30 December 2015 it also marked the end of Magnox reactor generation in the UK.
Since then, significant decommissioning progress has been made with almost 88,000 fuel elements safely removed during defueling.
Wylfa is also responsible for the Maentwrog hydro-electric power station in Gwynedd, North Wales.
Information is presented about wastes that existed at Wylfa 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.
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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.