Japan Times: Many experts remain alarmed about risk of Unit 4 collapse — Structure not as strong as it was, work must be sped up — 10 years to remove all fuel from all pools?

Published: October 11th, 2012 at 4:55 am ET
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Watch a Japanese ambassador reveal Unit 4 is sinking here

Title: Noda lauds work to ease reactor 4 fuel threat; fears remain
Source: The Japan Times Online
Authors: REIJI YOSHIDA and KAZUAKI NAGATA
Date: Thursday, Oct. 11, 2012

[...] many experts across the world remain alarmed about the possibility of the reactor 4 building collapsing in the event of another major temblor [...]

Removing all of the fuel assemblies from the spent-fuel pools in the four wrecked reactors is projected to take around 10 years

[...] the blast in the reactor 4 building extensively damaged the fourth floor as well, and despite the reinforcement work, the overall structure is not as strong as before, [Hajimu Yamana, a Kyoto University professor who sits on the committee overseeing the power station's long-term management] said.

“So we need to speed up work as far as unit 4 is concerned,” Yamana added. [...]

Published: October 11th, 2012 at 4:55 am ET
By

11 comments

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  3. Source: First try to remove spent fuel from Unit 4 could be next week — Nuclear Engineer: Everyone’s nervous about pulling out used rods that are corroding; Will zircoloy tubes break and spill fuel pellets, leading to a criticality? (AUDIO) November 23, 2013
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11 comments to Japan Times: Many experts remain alarmed about risk of Unit 4 collapse — Structure not as strong as it was, work must be sped up — 10 years to remove all fuel from all pools?

  • PhilipUpNorth

    Is TEPCO doing anything at all around Unit4 these days? This summer, they removed the structure above the equipment floor, and seemed ready to build the Crane Support Structure. Have seen workmen on Unit4 recently, but no progress on Crane Support Structure. Since then, they just seemed to have stopped working at Unit4.


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  • Anthony Anthony

    In stark contrast to the assurances issued publicly by Tepco about the same structure. And from the guy overseeing their longterm management. Nuff said!


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  • Chelsea Chelsea

    Maybe I missed something, but this is the first time I've seen anybody working directly on Fukushima directly state that there was a blast at Unit 4. I thought they were still holding fast at only two blasts, at 1 and 3…


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  • TheBigPicture TheBigPicture

    Lowering the risks and danger is the responsibility of nuclear industries worldwide, as the contamination is worldwide, and solely the result of man-made nuclear reactors.


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  • I have noticed over the last few days, (on the TEPCO web cam), that the hole just below the exposed level on Unit #4 has been getting a lot of attention.

    I have no clue as to what they are doing, but I can tell they are working quickly.

    Something's going on. We will not be informed. My opinion.


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  • patb2009

    most likely the hole is a structural failure in unit 4, it's been bulging and TEPCO
    freaked out and tore the upper decks off, to reduce load, and has probably been shoring it up.

    Honestly, why it takes 10 years to empty the pool at sfp4, escapes me, you have to send a few hundred men to their deaths, but, loading cranes and pulling elements out and spraying them with water will work. lift them out, drop them in lead baskets, lift the baskets out and
    transfer them to an inland storage pool. where they can be handled better, broken down,
    and put into dry casks.


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  • moonshellblue moonshellblue

    I've been listening to both presidential candidates speak and when the talk about energy Obama does not mention nuclear but Romney still does which I find interesting. I think Obama knows just how bad Fukushima is and Romney seems to be clueless or is appeasing his contributors. That is the problem these guys get all their money from corporations unlike the Green Party. NO NUKES


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    • Radio VicFromOregon

      Yep, moonshellblue. Obama has always supported nuclear and is looking into both the thorium LFTR and also the fast breeder reactors technology on the premise that they can burn up the piles of nuke waste.


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