Site History
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Construction of Wylfa power station and its reactors, the largest of their type, commenced in 1963 and started supplying electricity to the grid in 1971. Its location was chosen as it provided easy access for construction, is geographically stable and has a vast, unlimited source of cooling water from the Irish sea.
Wylfa was the second pre-stressed concrete pressure vessel and final Magnox plant to be built with an original design capacity of 1140MWso. This design was the precursor for the next generation Advanced Gas Cooled Reactor (AGR) fleet. In 1992/93 Wylfa beat its own record for the third successive year generating over 7.7 million MWhrs of electricity. With a load factor of 98.2%, Wylfa’s Reactor 1 rated the World’s No 1 performer (World Nuclear Performance Jan 1993 published by McGraw-Hill). And in 2002/03 Wylfa generated 7.3 million MWhrs, the fourth highest output in its lifetime. Since commissioning, Wylfa has generated over 225,000 million units (KWhrs) of electricity.
Station ownership
1965-1989 Central Electricity Generating Board (CEGB)
1989-1994 Nuclear Electric plc (following the part privatisation of the CEGB)
1994-1998 Magnox Electric plc (following the transfer of the AGR and PWR nuclear power stations to British Energy plc)
1998-2004 British Nuclear Fuels plc
2004 to date The Nuclear Decommissioning Authority (following the restructuring of the UK nuclear industry and transfer of all UK nuclear legacy to the NDA)
