Nuclear Submarines

Lord Walney Excerpts

Thursday 6th March 2014 Commons Chamber

[Mr Hammond]

As my right hon. Friend says, Governments of both persuasions over the years have adopted a prudent and precautionary approach to the safety of our nuclear submarine fleet, and have invested money, where it is necessary to do so, on the basis that safety always takes priority. As I have said, the decisions that I am announcing today are not driven by concerns about safety. There is no safety risk identified from this incident. They are driven primarily by concerns about future submarine availability.

The information on core burn is classified, but I can reassure the House that the percentage of core burn on the reactor at Dounreay exceeds by far the percentage of core burn on any of our operational reactors.

[John Woodcock (Barrow and Furness) (Lab/Co-op)]

Continuous at-sea deterrence is of course the foundation of our deterrent policy. As the Secretary of State knows much better than I do, it requires not only the Vanguard-class submarines to be continuously at sea, but the Trafalgar and the Astute classes to be around. The worst-case scenario would be the refuelling of all Vanguard and Astute submarines. Does he have complete confidence that CASD would be maintained if that were to happen, and what additional capacity would be needed to carry out such an extensive venture?

[Mr Hammond]

The hon. Gentleman asks sensible questions, but he is verging into speculative matters at this stage. This is a very tiny flaw in a reactor that has been hammered at maximum output over a long time. It is premature to suggest that when we examine the core we will find some systemic need to refuel all other reactors of a similar type. That is not the expectation. However, as he would expect, we will plan for every contingency, and the measures that I have announced will allow us to preserve the option of refuelling further Vanguard and Astute submarines should that be deemed expedient in the future.