Defence: Nuclear Submarines

Lord Reid of Cardowan Excerpts

Thursday 6th March 2014 Lords Chamber

[Lord Astor of Hever]

My noble friend has asked a very good question. Rolls-Royce is the MoD’s technical authority for the design of reactors and the manufacture of the cores. It has delivered reactor cores for UK submarines for more than 50 years. We are confident that it will deliver the cores we require in the future. There is no effect on jobs at the Rolls-Royce facility in Derby.

[Lord Reid of Cardowan (Lab)]

The operational questions arising have largely have been covered by my noble friend Lord West and the noble and gallant Lord, Lord Boyce. In more immediate terms, the concern obviously will be the safety of personnel at Dounreay and on the submarines. Although it has been deemed that there is no risk and that the reactor, with all its accoutrements, has been restarted, will he confirm, first, that there will be continuous monitoring of a specific nature at Dounreay? Secondly, even though there is no risk discerned in the test reactor at Dounreay, will he confirm that there is even less risk on the submarines themselves; and that there has been no evidence that the same phenomena have occurred on any submarines, and that that will be monitored? Thirdly, will he confirm that the refuelling will take place at Devonport rather than anywhere else?

[Lord Astor of Hever]

My Lords, it will take place at Devonport in Plymouth, yes. There is no risk, I can assure the noble Lord, to the workers or the local community up at Dounreay. The naval reactor test establishment remains a very safe and low-risk site. Workers remain safe and the local community and environment is not at risk. There has been a very small increase in the radioactivity of the coolant in the sealed reactor circuit. This has not gone outside the sealed unit and it has certainly not gone into the atmosphere. This refuelling is a prudent, pre-emptive and purely precautionary measure and it has been carried out to manage risk to the operational submarine programme and not to mitigate any safety issue.

As far as any risk to the submarine crews is concerned, the safety of our nuclear submarines is not in doubt and we have not identified any issues with our operational submarines. The refuelling of HMS “Vanguard” will begin in late 2015 as a precautionary measure during her scheduled deep maintenance period. If a leak occurred on a submarine, it would be detected immediately.