Tepco: Fuel assemblies could be damaged from shock in Fukushima Unit 3 pool

Published: December 21st, 2012 at 10:29 am ET
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Title: Tepco settles over nuke evacuee death
Source: Jiji
Date: Dec. 21, 2012

[...] Another steel beam was found during a later camera survey in addition to a 30-ton fuel exchanger and concrete pieces, which dropped into the [Fukushima Daiichi Unit 3 spent fuel] pool when a hydrogen explosion occurred at the building after the March 2011 earthquake and tsunami crippled the plant.

Tepco has confirmed that the steel beams and fuel exchanger have not touched the nuclear fuel rack. But it has noted fuel assemblies could have been damaged by the shock of their fall into the pool. [...]

See also: Gundersen: I'm sure there's a lot of damaged nuclear fuel in Fukushima spent fuel pools -- The tubes are cracked -- May be completely severed (VIDEO)

Published: December 21st, 2012 at 10:29 am ET
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19 comments

Related Posts

  1. Tepco says fuel assemblies could be damaged if hit by heavy object — Unable to locate beam in pool? (VIDEO) September 25, 2012
  2. Japan TV: Steel beam found next to fuel rod assemblies in Fukushima fuel pool — Tepco raises possibility of damage (VIDEO) September 25, 2012
  3. New images of fallen steel beam atop fuel assemblies in Unit 3 pool — Handles covered in debris, barely visible (PHOTOS) October 5, 2012
  4. Gundersen: Damage to Fukushima Unit 3 fuel racks could be from prompt moderated criticality, not objects falling in pool — What does Tepco know that they haven’t yet shown photos of? December 21, 2012
  5. New images of Unit 3 fuel pool show debris near surface, possibly in danger of falling inside — Tepco investigating “condition of steel members partially immersed in pool” (PHOTOS) September 13, 2012

19 comments to Tepco: Fuel assemblies could be damaged from shock in Fukushima Unit 3 pool

  • Nukites

    They must have hired some rocket scientists.


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  • domjox domjox

    Really? Damaged assemblies? I never would have guessed, Considering the condition of the completely safe reactor and building.


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  • domjox domjox

    The question that i keep coming back to is what caused the shotgun blast looking hole in the top of the building. The reactor or the fuel pool. Is there really any intact fuel assemblies left In the pool? If it was the reactor how is it possible that the containment head still be on after that blast ( oh yeah, we can call it a detonation now). I firmly believe that there is way more contamination than what has been disclosed. And we all get to pay for the greed and deceit. Yummy!


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  • bwoodfield bwoodfield

    As majia eluded to, I'm curious as to the true state of the reaction chamber in Unit 3. With the state of damage that they are finding in the SFP, and the reaction chamber being figuratively "in the next room", I can't help but wonder if some of this falling debris also resided inside the reaction chamber. We already know that the internal pressure was well over the 100 psi limit, and that the reaction chamber is no made to withstand the forces caused by a detonation shock (which has been shown to be what happened). I'm thinking that the over-pressured chamber either collapsed, or is in a state that is barely holding it's structural integrity, and Tepco is doing the bait and switch by showing how bad the SFP is in and the work they are doing so no one thinks of peeking into the next room.


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    • moonshellblue moonshellblue

      We also know that the corium from TMI was 36% dust this also happened at Chernobyl and TMI was a partial meltdown thus not as catastrophic as Fuku perhaps this is why TEPCO cannot locate the melted cores. I think most, is dust and was vaporized plus the ongoing criticality's continue to this day. I really don't think much can be done to stop this runaway nuclear nightmare other than what TEPCO is doing to prevent another hydrogen explosion and cleaning up the wreckage. JMHO


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  • domjox domjox

    I am not buying the hydrogen explosion theory, just from looking at the damage to the building. It appears to be a much more powerful. " detonation" than the others. In any case, nucs are obviously beyond our abilities to control. The cost of these failures are horrendous and they ALL need to be shut down! and decommisioned. This can put tons of people to work for many years.


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  • "could be…" (?)

    It's a 'domino effect'.
    - (an analogy to a falling row of dominoes)

    There is no way they can keep these destroyed, not crippled, nuclear power plants from spewing their radioactivity globally.

    They are struggling against the odds.


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    • moonshellblue moonshellblue

      "Now I am become death, the destroyer of worlds" Well really nothing can be done at this juncture. Sometimes I wonder if the initial plan to bomb Fukushima to stop fissioning would have been better than the current situation. I doubt it, just thinking thoughts. Anyway, I hope everyone has an awesome holiday season and start to the new year. NO NUKES never give up.


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  • weeman

    Look at pictures of SFP why is the area around were the reactor is clear and the rest of the pool is cloudy, to me the explosion occurred over reacor and blow debris away from this area and hence no debris over detonation zone, anybody have any ideas why, only speculating.
    Just say no to fission.


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  • domjox domjox

    So an explosion in the basement of the building will cause an almost perfectly round hole thru the roof and seriously twisted beams and debris around this hole. Seems to me a basement explosion would have done a different type if exlosive footprint. Like completely leveling the building in a more unilateral fashion.


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  • Heart of the Rose Heart of the Rose

    I'm in the mood to be shot down today ..so.
    On the premise that the nuclear material..in both the reactor and the spent fuel pool will begin chemical transformation at the same temperature.
    And if is to be assumed that the cooling was lost in both.
    Then..a detonation wave.would occur..from the view of the original exposion..it looks as if..the explosion may have occurred in the SFP..I tend to think the 'basement of the reactor.
    The detonation wave..caused shock..
    Then comes the hydrogen..because the rods are lined with zinc alloy..then of course… nuclear..as the reactor exploded..with debris..being blown first outward then upward..tremendous debris falling back into and surrounding the reactor.

    http://en.wikipedia.org/wiki/Zinc_alloy


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  • razzz razzz

    I don't know how they can tell how much damage there is to the fuel and fuel racks until they remove the refueling bridge and its track along with its associated equipment still laying on the racks and in the pool area.

    To much heat signature for just a hydrogen explosion even though hydrogen was everywhere before it lit off. Then there is the added explosion of water flashing to steam. What gets hot enough to warp metal trusses to act like spaghetti?

    They knew to evacuate the workers before Unit 3 explosion so they must have had an idea of the conditions even though they left firemen on ground to keep trying to cool down the reactor. Wasn't it five firemen died during 3's explosion?


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  • Heart of the Rose Heart of the Rose

    @razz..thanks…I omitted water from the equation.


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  • weeman

    So they took pictures of another beam and while you where investigating you did not have a peak at the fuel assemblies while you were there, of course you did and what did you found was only for inquiring minds and privy to the nuclear family, someone be a human a step forward, I know that your conscience is bothering you and you have a hard time living with yourself, clear your mind and step up to the plate and rejoin the human race.


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