Corporate report

Nuclear Decommissioning Authority: technical baseline

This report provides a high-level overview of the processes and associated technologies used or planned to be used to deliver our mission.


NDA technical baseline - October 2016

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The UK’s nuclear energy programme, dating from the post-war years, has left a challenging decommissioning legacy to the country: numerous prototype reactors, fuel-manufacturing plants, research centres, reprocessing plants and 11 power stations. The Sellafield site in west Cumbria houses more than 200 nuclear facilities and 1,000 buildings, making it one of the world’s most complex environmental decommissioning challenges. Across the UK many ‘never-done-before’ decommissioning projects will need to be completed. The Nuclear Decommissioning Authority (NDA) was established under the Energy Act (2004) to ensure that the UK’s nuclear legacy sites are decommissioned and cleaned up safely, securely, cost-effectively and in ways that protect people and the environment.

This document provides a high-level overview of the processes and associated technologies used or planned to be used to deliver our mission and the organisations responsible for their development and implementation. It is based upon NDA estate information available up to the end of August 2016. It is aimed at a technical audience (e.g. experience in Science, Technology, Engineering or Mathematics) who have a general understanding of the challenges associated with decommissioning nuclear facilities. It is designed to provide the technical community, both academic and industrial, with information regarding the approaches and technologies being developed and adopted. It also highlights opportunities that the NDA estate have identified for developing improved technical solutions to their wide range of challenging technical issues.

Future versions of this document will include any changes to the Technical Baseline and highlight the impact of R&D on the delivery of the NDA’s mission.

If you have any feedback on the current Technical Baseline or the report itself, please send it to

Published 30 November 2016