Trawsfynydd nuclear power station, Snowdonia National Park, Wales
Trawsfynydd nuclear power station (Welsh: Atomfa Trawsfynydd) is a decommissioned Magnox nuclear power station situated in Snowdonia National Park in Gwynedd, Wales. The plant, which became operational in 1965, was the only nuclear power station in the UK to be built inland, with cooling water that was taken from the man-made Llyn Trawsfynydd reservoir which also supplies the hydro-electric Maentwrog power station. It was closed in 1991. Its planned decommissioning by Magnox Ltd was expected to take almost 100 years, but in 2021 the Welsh government arranged for the power station to be redeveloped using small-scale reactors.