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Re: [OM] OT: Tsunami

Subject: Re: [OM] OT: Tsunami
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Wed, 16 Mar 2011 08:37:59 -0400
Think of the reactors being on the main floor of a 2 story house.  The 
spent fuel rods (which also have to kept cool) are store in the attic of 
the same building.

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On 3/15/2011 5:42 PM, Brian Gray wrote:
> Chuck Norcott&  Andrew fildes wrote
>
>> Thanks for the generator details.  I was curious how that happened.
>> This may well go down as the worst engineering design disaster in
>> history.  Also, I'd never heard of "The Black Swan" and have just added
>> it to my Amazon wish list.
>
>> Chuck Norcutt
>
>
> On 3/14/2011 2:15 AM, Andrew Fildes wrote:
>
>>>   That would make sense but it may be at the cost of other
>>>   functionality - I'm too tired to check. But making it the default -
>>>   dumb stuff. I was listening to a story about the Japanese tsunami on
>>>   the radio an hour or so ago. It appears that the designers of one of
>>>   those nuclear (nooculer if you're murkin  :-)) power plants built a
>>>   big concrete sea wall to protect the plant. The tsunami simply swept
>>>   over the wall and drowned the plant generators which had been
>>>   cleverly positioned just below the wall. This shut down power to the
>>>   cooling system and made it impossible to Scram the reactors. It
>>>   sounds really dumb now but I'll bet it didn't at the time they built
>>>   it.
> A UK nuclear engineer lecturing locally tonight stated that the
> Fukushima generators were raised high enough to cope with the highest
> anticipated tsunami, but the one last week was half a metre higher than
> that highest expected.
>
> Another lesson learned.  But already the proposed designs under
> consideration for possible future UK reactors should not require
> generators or other external power supply for some time - with
> instrumentation powered by batteries for a significant period.
>
> Personally, I am inclined to congratulate those who forty years ago
> designed and built the pressure vessels which have stood up to so much
> in the last few days.    A very expensive accident in financial terms
> but not, so far, in human terms.
>
> Brian Gray

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