Magnox Electric Ltd

Trawsfynydd Capping Roof Contract awarded to Costain Group

30 April 2008

A contract worth £11m has been awarded by Magnox North to Costain Group, which will see the construction of a new internal capping roof on both of the reactor buildings at Trawsfynydd Site.

This is a major part of the Safestore Height Reduction programme which followed a public enquiry in 2004. Each reactor building will be lowered by approximately one third in order to reduce their visual impact on the landscape within the Snowdonia National Park.

The 3.5 year project will be a very challenging and complex programme which will provide secondary weatherproofing to the buildings during the care and maintenance period of the decommissioning strategy. Once this stage of the work is finished, the existing external concrete cladding will be removed and the height-reduced buildings, known as Safe Stores, will be re-clad with materials that will provide a weatherproof envelope.

Works are due to commence physically on the Capping Roofs within Safestore One in August followed by Safestore Two in December. There is a considerable amount of work to be undertaken in advance of these dates, which will include method statements, health and safety documentation, quality assurance documentation, before and off-site fabrication can begin.

Gerallt Williams, Project Lead for Magnox, said: “As soon as the Nuclear Decommissioning Authority (NDA) were able endorse the full value of the project we wasted no time in placing the contract to carry out the work. In doing so, the site was able to achieve two Performance Based Incentives (PBI’s).”

As with all work of this type, the aim is to deliver the works in accordance with the Lifetime Plan and to maximise efficiency for our customer.”