Written Question·Ministry of Defence·UIN 100758

Submarines: Decommissioning

Tabled: 16 December 2025

Answered: 22 December 2025

Question

Ben Obese-Jecty

To ask the Secretary of State for Defence, pursuant to the answer of 16th December 2025, to question 98210 on Submarines: Decommissioning, what is the process for defueling decommissioned submarines.

Answer

Luke Pollard

The twelve decommissioned, first generation Pressurised Water Reactor (PWR1) submarines awaiting defuel in Devonport will dock in a specialised, licensed dock in Devonport, following processes regulated by the Office for Nuclear Regulation. The used fuel ...

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