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Tremors exceeded design limits for 3 reactors

Posted by Danedukenuuk Apr 1 '11, 05:36

The utility says it was planning to reinforce the reactors so they could withstand horizontal shaking of 600 gals, after the government reviewed their quake-resistance standards 5 years ago. But the work was not finished.

http://www3.nhk.or.jp/daily/english/01_39.html (www3.nhk.or.jp)

Responses:

Didn't the reactors exceed expectations? They withstanded a 9.0 earthquake + tsunami when they weren't designed to do so. - Strongbad Apr 1, 05:45 24
- why weren't they? it's a known risk in that area. -- nm - loosilu Apr 1, 05:55 4
  - i can speculate bit that would probably bee seen as anti technology oppinions -- nm - Danedukenuuk Apr 1, 05:58
  - Good question. I don't know. - Strongbad Apr 1, 05:57 2
    - as Dane said below, they were known to be inadequate 5 years ago. And their emergency response plan was completely inadequate. -- nm - loosilu Apr 1, 05:58 1
      - I agree. -- nm - Strongbad Apr 1, 06:01
- if they had been upgraded like recomended 5 years ago they apparently would have been withing limits - Danedukenuuk Apr 1, 05:48 18
  - But the loss of power wouldn't have been changed, I suspect. -- nm - Strongbad Apr 1, 05:52 17
    - hard to say with the data avaiable - Danedukenuuk Apr 1, 05:57 3
      - that area is well known to have a risk for 9+ earthquakes. you can't build a nuke plant without putting in a safety margin. -- nm - loosilu Apr 1, 05:59 2
        
        the plant was originally buil and no quake above richter scale level 8 was imaging and the plant was layouted to withstan a level 8.3 -- nm - Danedukenuuk Apr 1, 06:00 1
        
        this is what I'm saying. that area is at risk for higher. -- nm - loosilu Apr 1, 06:02
    - and that's not ok. they should have had backups for the backups. -- nm - loosilu Apr 1, 05:55 12
      - I agree. - Strongbad Apr 1, 06:00 2
        
        just becorse you have the structure standing is not the same as the plant withstood a quake and tsunami - Danedukenuuk Apr 1, 06:12 1
        
        You want to talk safer? Fine. - Strongbad Apr 1, 09:07
      - they have a 4 layer backup system (or normally have) -- nm - Danedukenuuk Apr 1, 05:59
      - There were 3 systems in place. Hindsight says it wasn't enough. But 3 redundancies his hardly a lack of foresight. -- nm - TWuG Apr 1, 05:58 7
        
        that depends on the backup systems - Danedukenuuk Apr 1, 06:07 3
        
        Electric grid powered pumps backed up by diesel generator powered pumps backed up by battery powered pumps. Reasonably, what would be the next back-up - TWuG Apr 1, 06:12 2
        
        you know that is the problem right there only nuclear powerplant engenners can actually discuss this - Danedukenuuk Apr 1, 06:15
        
        hand crank -- nm - znufrii Apr 1, 06:12
        
        their plans showed very little foresight, and they knew it. -- (link) - loosilu Apr 1, 06:00 2
        
        they also send in the workers without dosimeters - Danedukenuuk Apr 1, 06:03 1
        
        yep, and they don't have nearly enough suits. it's a mess. There's no excuse for that for a nuke plant in that place. -- nm - loosilu Apr 1, 06:04

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Tremors exceeded design limits for 3 reactors

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