What we do

Our work is as diverse as it is challenging, ranging from electricity generation through to defuelling sites at the end of generation and the introduction of innovative techniques to accelerate decommissioning and clean-up.

To do this Magnox organises its decommissioning projects into defined work programmes to deliver safe, efficient and fit for purpose solutions, to tackle hazard reduction in a safe and consistent way across all of our sites.

Our work programmes

The Fuel Element Debris (FED) Treatment Programme is responsible for the retrieval and reprocessing of FED to make it ready for final disposal, significantly reducing hazard at sites.

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The Ponds Programme is responsible for the decommissioning of the redundant fuel storage ponds at sites, and the commissioning and decommissioning of associated treatment plants. 

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The Intermediate Level Waste (ILW) Management Programme is responsible for the retrieval and packaging of operational ILW for final disposal, totalling approximately 6,400m3.

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The Plant and Structures Programme is responsible for deplanting, demolishing and remediating structures, buildings and land so that the sites are ready to enter a passive state.

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Waste Management is responsible for maintaining waste inventories, developing disposal routes and maintaining Magnox’s decommissioning strategy, including engaging with our regulators. 

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The objective of the Magnox Operating Plan (MOP) is to enable the UK to meet its international environmental and safety commitments in bringing the Magnox fuel cycle to a close.

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Entry into a passive state, known as care and maintenance (C&M), is a key milestone in the process of decommissioning the Magnox sites.

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Our phases of work


During generation Magnox will maximise electricity generation while ensuring continued excellent performance in nuclear safety and operations.

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Reactors, cooling ponds and fuel cells containing used fuel are emptied, and the fuel is transferred off-site for reprocessing. Redundant plant can also be removed.

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C&M Preparations

During this phase hazards are reduced, buildings are deplanted and demolished. Waste is managed and maintenance requirements minimised. 


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Final Site Clearance

This is the last stage in a site’s lifecycle with the removal of reactor vessels and building demolition. Sites will be declassified as nuclear licensed sites. 


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Our sites


27 Site area (Hectares)
Current number of full time equivalents
43 Station lifetime output of electricity (TWh)
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Current phase: C&M Preparations

Recent Magnox Achievements

‘Lead and learn’ is a key principle for Strategic Programmes. The ability to take the learning from one project and apply it to a different location, reducing cost and improving effectiveness, is a cornerstone of the programme. We are pleased that our contract partners have now demonstrated this principle, moving from one site to another and taking the learning with them.

Some recent key achievements include:

  • At Dungeness A, Magnox has pioneered the FED dissolution approach, dissolving FED in an acid solution, reducing the volume by more than 90 per cent.
  • Trawsfynydd is the first Magnox site to fully clear an ILW resin tank after retrieving all residual resin wastes.
  • An extra £12.8 million of funding has been secured from the NDA to speed up the clearance of the south side of Dungeness A over the next three years, rather than the 15 years as originally planned.
  • A new route for very low level waste (VLLW) has been successfully trialled at Trawsfynydd, allowing the waste to be shipped to a specialist landfill facility.
  • ILW has been retrieved and packaged at Berkeley, Bradwell and Trawsfynydd.
  • Bradwell Site has won a National Recycling Award for its approach to recycling on site.
  • One of Europe’s largest-known asbestos removal projects is underway at Chapelcross, with hazardous materials removed from turbines, condensers and boiler pump houses.
  • Over half of the pond volume at Hunterston A has now been drained and 1,000m2 of pond walls successfully decontaminated.