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,
Berkeley Nuclear Power Station and the site completely cleared between 2070 and 2080. In March 2012 five of the 310-tonne boilers were moved from the station to Sweden for decontamination and recycling. In December 2013 the Nuclear Decommissioning Authority selected Berkeley as the preferred interim store for Intermediate-level waste from the decommissioned Oldbury nuclear power station. This became operational in 2014. Berkeley is one of four nuclear power stations located close to the mouth of the River Severn and the Bristol Channel, the others being Oldbury, Hinkley Point A and Hinkley Point B. Berkeley Nuclear Power Station Berkeley nuclear power station is a disused