Trawsfynydd Site

Trawsfynydd is located on a 15.4 hectare site in Snowdonia National Park, North Wales, Trawsfynydd was the first inland civil 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 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 the NRS  rolling programme of decommissioning.

Key priorities 2023-4

• Continue to encapsulate intermediate level waste packages.
• Continue processing intermediate level waste in the active waste vaults.
• Continue to reduce historic waste and complete low level waste consignments.
• Complete the reactor safestore internal roof capping project.
• Progress the procurement process for the reactor safestore height reduction project.
• Progress plans to demolish the former spent fuel cooling ponds complex.
• Upgrade the sewage treatment plant.