Trawsfynydd
Trawsfynydd is located on a 15.4 hectare site in Snowdonia National Park, North Wales, Trawsfynydd was the first inland civil Magnox nuclear station and drew its cooling water from Llyn (lake) Trawsfynydd.
The Central Electricity Generating Board was keen to recognise that Trawsfynydd was a Welsh power station, so a large, pebble ‘mosaic’ depicting a Welsh dragon forms the paving of the central courtyard which is now listed on the ‘Register of Historic Parks and Gardens in Wales’.
Trawsfynydd was the first Magnox site to recover radioactive waste from all its waste streams. Wet waste retrievals completed in 2018, followed by bulk fuel element debris retrievals in 2022.
Trawsfynydd is now the lead and learn site for Reactor Dismantling within Magnox’s Rolling Programme of Decommissioning.
Information is presented about wastes that existed at Trawsfynydd 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.
Waste groupings
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waste
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packaged
waste
Waste categories
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