The Wylfa Nuclear Power Station is situated just west of Cemaes Bay on the island of Anglesey, North Wales.
Wylfa houses two 490 MW Magnox nuclear reactors, "Wylfa-1" and "Wylfa-2", which were built from 1963 and became operational in 1971. They have a combined capacity of 980 MW.
On 20 July 2006 the NDA announced that the station will be shut down in 2010 because operation beyond then would be uneconomic given plans to shut down the Magnox spent fuel reprocessing plant at Sellafield. However in 2010 the NDA announced an extension to 2012, beyond Wylfa's 40th anniversary as a generating power station in January 2011.
A second plant (generally referred to as Wylfa B) has been proposed. Horizon Nuclear Power, an E.ON and RWE joint venture, announced in 2009 intentions to install about 3,000 MWe of new nuclear plant at Wylfa. Horizon is considering building either Areva EPR or Westinghouse AP1000 reactors at a site to the south of the existing Wylfa station.
On 18 October 2010 the British government announced that Wylfa was one of the eight sites it considered suitable for future nuclear power stations.