Written Question·Ministry of Defence·UIN 65493

Nuclear Reactors: Decommissioning

Tabled: 7 July 2025
Answered: 14 July 2025

Question

Helen Maguire

Liberal Democrat — Epsom and Ewell

To ask the Secretary of State for Defence, what estimate his Department has made of the potential cost of dismantling Pressurized Water Reactor nuclear reactors on redundant submarines at (a) Devonport and (b) Rosyth dockyards; and what recent discussions

Answer

Maria Eagle
It is not possible to provide an assured cost estimate to dismantle the Pressurised Water Reactors on the decommissioned submarines at Devonport and Rosyth. Once the demonstrator submarine, SWIFTSURE, has achieved full dismantling in 2026 the Department w...
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