[BITList] more: Hull Valve Blanking Failure

Wed May 5 13:22:33 BST 2010

e-mailhugh

interesting - I take it the main sea inlet covers were stowed aboard somewhere!  agree, I wouldn't fancy it either.
I was surprised to get a rapid response from from john h large, nuclear expert...............see email below.

ct

Colin,

Why would anyone fit blanks/plugs to an overboard or inlet on any vessel?  Three reasons come to mind.  Security/safety and convenience.  The first wouldn't normally be applicable to a merchant vessel in any normal circumstances, but a long forgotten application of the other came to mind.  A new-building in Scotts, either Blue Flue or BP - I did the underfloor arrangement and all the overboards and inlets.  The lower main sea inlets, P and S, had to have covers that would fit over the rectangular openings and grilles and be secured there against rubber seals by hooks going through the grilles. The covers were to be lowered on ropes and fitted by divers, so they were made hollow to increase the floatability. The idea was that the lower main sea inlet hull valves could be overhauled at sea.  I didn't fancy the idea at all, but it was a nice little design job.

With a warship alongside or in drydock, it could be a fear of nasty people sticking nasty things into unblanked openings.  Or, a nuclear sub might emit something noxious where it would be detected. Either way, sod all to do with relief valves.

Hugh.

From: John H Large 
Sent: Wednesday, May 05, 2010 3:31 AM
To: CT's 
Subject: Hull Valve Blanking Failure

Colin

Thank you for your enquiry which, I suggest, would be best answered by you referring to the source 'Toolbox Talk/Team Dialogue Safety Stand Down' Memo issued jointly by Babcock & DE & S (MoD) - if you have trouble accessing this then I can arrange for a copy to be available.

        Nuclear Test Veterans High Court Hearing - Large & Associates Evidence 

      Justifying UK New Build Nuclear’, Call for Independent Inquiry - Technical Omissions in the Justification Process, Palace of Westminster, London 11 March 2010

      SCANS Objection to Southampton City Council's Off-Site Emergency Planning for Nuclear Powered Submarine Berthing in the City

        largeassociates at largeassociates.com  largeassociates at o2.co.uk  largeassociates at gmail.com 

        The Gatehouse  1 Repository Road Ha-Ha Road London United Kingdom SE18 4BQ

                                    44 (0)20 8317 2860 (0)20 8317 2859  (0) 7971 088086 skype LargeAss   

                                    www.largeassociates.com 

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