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The Nuclear Decommissioning Authority

The Nuclear Decommissioning Authority (NDA) is a non-departmental public body sponsored by the Department for Business, Energy & Industrial Strategy. The NDA is responsible for the operation, decommissioning and clean-up of 17 nuclear reactor and research sites in the UK.

Of the 17 sites, Sellafield is the largest in terms of size and annual expenditure. It is also one of the most complex and hazardous nuclear sites in Europe. In 2015, the NDA announced that the management arrangements it had in place for the Sellafield site were ineffective; in April 2016, Sellafield Ltd became a wholly-owned subsidiary of the NDA. The NDA says these new arrangements will enable faster hazard and risk reduction at the site, and a more effective management of major projects. Alongside these changes, Sellafield is readying itself for the end of its reprocessing activities in 2020, meaning its operational focus will be on reducing high hazard reduction and decommissioning nuclear facilities. Sellafield has set out a transformation plan to support these changes.

This study will examine whether the new arrangements at Sellafield are effective in reducing high risk and hazard on the site, and whether the NDA is making progress with the performance of its major projects.

If you would like to provide evidence for our study please email the study team on, putting the study title in the subject line.

The team will consider the evidence you provide; however, please note that due to the volume of information we receive we may not respond to you directly. If you need to raise a concern please use our contact form.