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Nuclear Decommissioning at Oldbury

The Client

The Client Magnox Ltd, owned by the Cavendish Fluor Partnership, is the management and operations contractor responsible for safely managing ten nuclear power stations and one hydroelectric plant in the UK on behalf of the owner, the Nuclear Decommissioning Authority. Magnox oversees all aspects of electricity generation, defuelling and decommissioning until the end of the station’s life. This is followed by Final Site Clearance and reactor dismantling before the site is released for a new use.

Key Figures

• Reduced costs by 50%

• 26m3/day demineralised water

• £150,000 per year savings

• MODI trailer changed monthly

• Reduced maintenance and manpower requirements

The Client Needs

Oldbury Power Station, on the River Severn near Bristol, was commissioned in 1967. It had two Magnox reactors producing a total of 424 MWe. The station began to shut down in 2012 after producing some 137.5 TWh over 44 years of safe and successful operation. Generation ceased at the end of 2013 and Oldbury is now being defuelled Nuclear power generation at Oldbury consumed some 910m3/day of demineralised water for steam raising and cooling but, once generation ceased this reduced to about 26m3/day. This meant that the on-site demineralisation plant was larger than required and costly to maintain, so Magnox wanted to decommission and remove it. But they still needed a supply of demineralised water. They turned to Veolia Water Technologies.

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