Office for Nuclear Regulation

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  • Operator/Licensee: Magnox Limited
  • Parent body organisation: Cavendish Fluor Partnership
  • Type of site: Operational
  • Location: Anglesey, North Wales

Magnox website

Wylfa - Copyright Magnox Limited


Wylfa is an operational power station on a 20.79 hectare site on the north coast of Anglesey between Holyhead and Amlwch. 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.

The site has only one running reactor and two operational turbine generators, but with an output of around 460MW can supply more than 20 per cent of Wales electricity needs. Wylfa is also responsible for the 30MW Maentwrog hydroelectric station near Blaenau Ffestiniog.

Wylfa's primary objective at the site as the tier 1 management and operations contractor is to continue to generate electricity to the national grid for public consumption as well as maximise economic return, while maintaining a safe and secure working environment. At the same time, Magnox Limited is preparing the power station for a seamless transition to the Defueling phase, the start of the power stations decommissioning programme.

Magnox Limited is the management and operations contractor responsible for the day-to-day operation of the site under contract to the Nuclear Decommissioning Authority.