comprises the Sellafield nuclear chemical facility and Calder Hall. It also previously managed the Capenhurst uranium enrichment plant, which is now owned by Urenco. Its PBO was formerly Nuclear Management Partners Ltd, a consortium of URS, Amec Foster Wheeler and Areva. However, Sellafield Ltd has been under the direct control of the NDA since April 2016. Magnox Ltd previously two separate site licence companies), manages ten Magnox nuclear power stations and the Harwell and Winfrith facilities. It comprises Chapelcross, Hunterston A, Trawsfynydd, Wylfa and Oldbury (previously Magnox North) and Berkeley, Bradwell, Dungeness A, Hinkley Point A and Sizewell A (previously Magnox South). Its PBO was formerly Cavendish Fluor Partnership, a consortium of Babcock International and Fluor. Magnox Ltd has been a subsidiary of the NDA since September 2019. Dounreay Site Restoration Limited (DSRL) comprises the Dounreay site. Until March 2021, its PBO was Cavendish Dounreay Partnership, a consortium of Babcock International, CH2M Hill and URS. It is now directly managed by the NDA. LLW Repository comprises the Low Level Waste Repository near Drigg in Cumbria. Until July 2021, its PBO was UK Nuclear Waste Management, a consortium of URS, Studsvik, Areva and Serco. It is now a subsidiary of the NDA. Springfields Fuels comprises the Springfields nuclear fuel production facility near Preston, Lancashire. Its PBO is Westinghouse Electric Company, a subsidiary of Toshiba. On its creation, the NDA also took over ownership of Direct Rail Services, the rail freight operating company set up by BNFL in 1995 to transport nuclear materials; and International Nuclear Services, which operates services on behalf of the NDA for the management and transportation of nuclear fuels. Both have since merged to become Nuclear Transport Solutions. The NDA is also the owner of Radioactive Waste Management (RWM), which is responsible for implementing a geological disposal facility in the UK and provide radioactive waste management solutions. In February 2017, a national archive for the UK civil nuclear industry, named Nucleus, was opened in Wick, Caithness, Scotland. Costs In 2005, the cost of decommissioning these sites was planned at £55.8billion, with Sellafield requiring £31.5billion. However, in 2006, the NDA reported that the cost of cleaning up existing waste was higher than previously thought, and gave a new estimated decommissioning cost of about £72billion over a 100-year period. In 2008, estimated decommissioning costs increased to £73.6billion, or after taking account of discount rates, £44.1billion. A 2006 estimate foresaw £14billion