The UK’s Nuclear Decommissioning Authority has reached a landmark in nuclear safety after successfully processing a can of plutonium residue into a stable waste form for the first time…reports Asian Lite News
The UK’s Nuclear Decommissioning Authority (NDA) group has achieved a UK-first nuclear safety milestone by safely processing a can of plutonium residue into a stable waste form for the first time. The achievement represents a significant step towards the long-term disposal of the country’s plutonium legacy and underlines the scale of the challenge facing the nuclear industry as it deals with materials generated during decades of historic fuel manufacturing and reprocessing.
The work was carried out at the NDA group’s Sellafield site in Cumbria, where the residue – a by-product from past manufacturing processes of nuclear fuels and other materials – has been safely managed for many years. The successful processing of the first can marks the beginning of a wider programme to treat around 400 similar cans of plutonium residue currently held at Sellafield.
Once processed, the residue is transformed into a more stable form suitable for eventual disposal in a future Geological Disposal Facility (GDF). The work is being undertaken in a Sellafield plant that has operated safely since the mid-1980s, following adaptations to enable it to handle this specific material. The decision to repurpose and upgrade existing facilities, rather than construct a new plant, is intended to accelerate delivery while providing better value for money for the taxpayer.
The NDA said the milestone demonstrates both technical expertise and the ability to make progress quickly on complex nuclear challenges. The processing of the first can was completed within 12 months of the relevant policy being announced, providing early evidence of delivery following government direction.
David Peattie, the NDA Group chief executive, said the achievement showed the “unrivalled expertise of the NDA group”, paying particular tribute to the Sellafield workforce whose specialist skills made the work possible. He said that while the full immobilisation programme for plutonium would take many decades, processing the first can of residue into a disposable form represented “significant progress”.
Peattie added that tackling the UK’s plutonium challenge would remain a priority for the NDA for decades, noting that the group was leading the work with the backing of government investment to improve safety for future generations.
The milestone was also welcomed by ministers. Lord Vallance, the Minister for Science, Innovation, Research and Nuclear, said the work was a testament to the UK’s leadership in innovation and nuclear legacy management, highlighting the expertise and commitment of the workforce at Sellafield.
Sellafield’s chief executive, Euan Hutton, said dealing with plutonium would dominate the site’s work for many years. He described plutonium as an extremely hazardous substance and said converting it into a safe form and then disposing of it would be a defining task for the organisation. He said the latest achievement allowed some of the more problematic material to be dealt with sooner, helping to put it “beyond reach” at an earlier stage.
Hutton also pointed to the role of Sellafield’s specialist workforce, trained in unique “alpha” handling skills, who have adapted processes to manage material that had not previously been treated in this way. He said their innovation and commitment underpinned the progress made so far.
The successful processing of plutonium residue is seen as an important foundation for the next phase of work, which involves the immobilisation of the UK’s entire civil separated plutonium inventory. The NDA group was formally tasked by the government in January 2025 with developing a long-term solution for this material.
Immobilisation is intended to place plutonium beyond reach, reducing long-term safety and security risks. However, the majority of the UK’s plutonium is held in a more hazardous oxide powder form, which cannot be processed using existing techniques. Addressing this challenge will require the design and testing of first-of-its-kind technology capable of locking the material into a stable form suitable for permanent disposal in a GDF.
To support this work, the government has allocated £154 million over five years to the NDA group. The funding has already helped deliver early progress on the plutonium residue programme and will support further development of specialist laboratory facilities at Sellafield. These facilities will be used to test and prove technologies needed to immobilise the wider plutonium inventory, alongside the development of new processing and interim storage capabilities.
