The United Kingdom is preparing to complete its long-running programme of returning high-level nuclear waste to Germany, marking the final in a decades-old reprocessing agreement.
Operators at Sellafield have confirmed that preparations are underway for the third and last shipment of vitrified high-level waste (HLW) residues. The transport, coordinated by Sellafield Ltd in partnership with Nuclear Transport Solutions (NTS), is scheduled for 2026.
In total, seven heavily shielded flasks containing vitrified waste will be transported from the Sellafield nuclear site in Cumbria to Germany’s Brokdorf interim storage facility. This delivery will conclude a series of returns tied to the reprocessing of spent nuclear fuel originally used by German energy utilities.
The shipment follows two earlier operations: the first in 2020, when six flasks were successfully delivered to Biblis, and a second in 2025 involving seven flasks transported to Isar. Both missions were carried out without incident.
The waste being returned is the by-product of fuel reprocessing activities carried out in the UK. Under international agreements, countries that sent nuclear fuel to Sellafield for recycling are responsible for taking back the resulting high-level waste.
Officials say the programme is a central element of the UK’s Nuclear Decommissioning Authority (NDA) strategy, aimed at fulfilling contractual obligations, reducing domestic waste liabilities, and aligning with government policy on nuclear clean-up.
Authorities emphasized that the upcoming transport will adhere strictly to all national and international safety regulations. Final approval remains subject to the necessary permits and regulatory clearances.
Further operational details, including transport timelines and logistics, are expected to be released closer to the shipment date. Photo by Simon Ledingham, Wikimedia commons.