Sellafield with extension options to 17 years. On 13 January 2015, the NDA announced that NMP would lose the management contract for Sellafield Ltd. as the "complexity and technical uncertainties presented significantly greater challenges than other NDA sites", and the site was therefore "less well suited" to the NDA's existing standard management model. The new structure, which came into effect on 1 April 2016, saw Sellafield Ltd. become a subsidiary of the NDA. Activities at the Sellafield site primarily support decommissioning of historic plants, and reprocessing fuel from UK and international nuclear reactors. Decommissioning projects include the Windscale Piles, Calder Hall,
Torness Nuclear Power Station AGR station. The construction, which was undertaken by a consortium known as National Nuclear Corporation ('NNC'), began in 1980. The reactors were supplied by NNC and the turbines by GEC. Torness was the last of the United Kingdom's second generation nuclear power plants to be commissioned (25 May 1988). The station consists of two advanced gas-cooled reactors (AGR) capable of producing a peak rating of 1364 MWe. Upon deregulation of the United Kingdom's electricity generation market it passed to the state-owned Scottish Nuclear, privatised as part of British Energy which was sold to the French company EDF in January 2009,