Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what assessment his Department has made of the potential merits of using the UK’s plutonium stockpile to generate electricity.

The Nuclear Decommissioning Authority (NDA) conducted substantial technical, deliverability and economic analysis to identify a preferred option for a long-term disposition solution for the UK-owned plutonium, considering options for immobilisation and reuse of the material as fuel to generate electricity. The outcome of this work recommended immobilisation as the preferred way forward to put the material beyond reach soonest and with greatest delivery confidence.

The plutonium cannot be used as fuel in its current form: new infrastructure for Mixed Oxide (MOX) fuel production would be required, as well as new reprocessing capabilities to sustain a closed fuel cycle. A proportion of the material is unsuitable for reuse in reactors and requires immobilisation in any scenario.