National Nuclear Laboratory Limited (NNL)
Central Laboratory, Sellafield, Seascale, Cumbria, CA20 1PG

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National Nuclear Laboratory Limited (NNL)


The UK’s National Nuclear Laboratory (NNL) offers a breadth of technical products and services covering the complete nuclear fuel cycle, from fuel manufacture and power generation to reprocessing, waste treatment and disposal. We operate from six sites in Cumbria, Lancashire, Cheshire, Gloucestershire and Oxfordshire, although most of our work is focused around our sites in the North West of England.

NNL is the second biggest industrial employer in West Cumbria with over six hundred staff at facilities in Workington and at Sellafield, including Central Windscale Laboratories.

With over 10,000 man years of nuclear experience across the fuel cycle, coupled with world-leading nuclear R&D facilities, we deliver the experts and technologies that ensure the UK nuclear industry operates safely, efficiently and cost effectively.


NNL plays a central role in the co-ordination of UK nuclear research and development and maintains close links with academia and industry. We support Government in safeguarding the UK’s nuclear skills and capabilities and provide advice on key strategic decisions.

The scope of our work includes measurement and analysis; waste and spent fuel technology; fuels and radioisotopes; safety management; asset care; security and environmental services.

Our UK customers include the Nuclear Decommissioning Authority, Sellafield Ltd, Magnox Ltd, Springfields Fuels Ltd, EdF Energy and the Ministry of Defence. We also serve other customers in the UK and worldwide and work closely with a number of UK universities and research organisations and with US national laboratories.

Along with The University of Manchester Dalton Nuclear Institute, NNL delivers the Innovus Technology Commercialisation Programme which provides access to expertise, experience and world leading facilities, as well as investment in technology development, for SMEs based in Cumbria and those with innovations that might benefit the nuclear clean up mission of Sellafield Ltd.


We provide quality and value to customers across a range of services:

  • Measurement and Analysis
  • Environmental Services
  • Waste Residues and Processes
  • Waste Management Technology
  • Fuel and Radioisotope Technology
  • Spent Fuel Technology
  • Safety Management
  • Asset Care
  • Security
  • Technology Commercialisation Support and 
  • Access to Facilities through Innovus

Contact Name: Simon Walker


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