Yomiuri: Melted fuel might have “cracked due to some shock” or “dropped down and changed shape” at Reactor No. 2, leading to recent temperature spike -Tepco

Published: February 8th, 2012 at 3:52 pm ET
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Title: Temperature inside reactor stops rising
Source: The Yomiuri Shimbun
Date: Feb 9, 2012

The abnormal rise in temperature in a reactor at the Fukushima No. 1 nuclear power plant has stopped, apparently because more water has been injected into the crippled reactor, according to Tokyo Electric Power Co. 

[...] the cause of the increased temperature remained unclear. [...]

According to TEPCO, the volume of water being injected was far less than usual. It is possible that the way water was injected into the reactor might have changed around the time of the pipe repairs, and that water did not reach some of the fuel.

TEPCO also speculated that the fuel, which had melted and then solidified, might have cracked due to some shock or dropped down and changed shape.

Read the report here

Published: February 8th, 2012 at 3:52 pm ET
By
Email Article Email Article
34 comments

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34 comments to Yomiuri: Melted fuel might have “cracked due to some shock” or “dropped down and changed shape” at Reactor No. 2, leading to recent temperature spike -Tepco

  • Anthony Anthony

    Hmm I think they might benefit looking at Steve in VA’s diagrams and theories.


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  • AFTERSHOCK AFTERSHOCK

    Well, it’s official. TEPCO’s obviously reading ENENEWS posts…


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    • LetThemEatYellowCake LetThemEatYellowCake

      It’s been obvious in the past as well. I consider it a wise thing to utilize the eyes and minds here, gives an outside view in combination with their readings and knowledge, particularly from fresh minds away from much of the contamination which can’t be helping their people in thinking clearly. It would be nice to see more employment of experts and utilization of ideas of course though. I still think it can’t hurt to have a visionary in combination with their heat seeking technology map out these turd tunnels. I know people have those skills.


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      • AFTERSHOCK AFTERSHOCK

        @LetThemEatYellowCake: I totally agree with-what you’re alluding too! For this reason, I’d like to open a discussion as to what some of us would suggest as solution to this particular series of failures at Fukushima. There are many engineers/researchers/scientists/thinking-machines that could hash-out solutions that might help the Japanese. It’s not enough to suggest that these plants be shutdown; doubtless, they’re getting that message. I think it’s time to throw some working suggestions out to them. Normally, I wouldn’t give these corporate whores the time of day. But this is no longer about pride or prejudice; it’s about the very survival of our species. From the tone of many press releases, I sense that they’re starting to get this, themselves. It’s time for all of us to put our shoulders into this!

        We’ll talk later. I must shut down here and see some friends. Stay brilliant!!!


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      • HoTaters HoTaters

        Am just throwing this out here since I’m absolutely NOT an expert in such things — but is there a form of glass or ceramic containing borosilicates that can withstand extremely high temperatures?

        /OR/

        What has been used as heat shielding on the Apollo, Russian, Nasa Space Shuttle vehicles, esp. or re-entry to the atmosphere? Any chance something like that could be adapted for use at Fukushima Daichi? Any chemists, metallurgists, engineering types out there who could answer?

        I think I read there is some type of borosilicate that is more temperature resistant than any other compound on earth. True? Untrue?

        Am wondering if there are ceramics that contain borosilicates. Borosilicate glass exists, but it is NOT a ceramic. Just trying to “brainstorm” this ….

        I wonder if Tepco has considered injecting something like that around the base of the reactors/spent fuel, or putting something like a borosilicate in place? Or maybe use a layer of it, in combination with layers of something else, like the “inside” or outside of a sandwich?

        Wondering if it (some kind of borosilicate compound) could withstand the kinds of temperatures and stresses created by molten nuclear fuel.

        Just wondering if y’all think anyone has considered it. Maybe some of you tech-savvy or engineering types could chime in on this one. That’s just my two cents’ worth on something that might be worth trying or at least looking at. (I could be completely off-base here.)

        I can think outside the box, but I don’t have the technical/engineering expertise to know what might work. I’m sure there are much greater minds than mine already working on this!


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        • anne anne

          Last 2 Russian attempts to send something into space have failed. The last time they said it was due to cosmic radiation, but more probably from radiation from Fukushima and other radiation from other nuclear plants. The earth is really glowing.
          NASA has stopped manned space flights? Is this related to too much radiation? Too much methane? etc.


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  • You mean to say the cookie dough is CHANGING SHAPE?

    OH MY FREAKIN GOD, OMG!!!!!

    This is horrible, terrible, obnoxious..

    I refuse to eat my cesium cookies if the dough has changed shape or cracked…

    Are we still in ‘cold shutdown’ or does this mean that the oven has heated up, ready to bake some cesium/iodine fortified cookies, with strontium icing of course?


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  • Total Radiation Released Into Ocean, Air, Groundwater, Storage Tanks, etc http://www.care2.com/c2c/share/detail/3069802
    A Green Road Blog
    http://www.agreenroadblog.com

    While all of this cookie dough cracking and changing shape is happening, the focus is off of how much total radiation has been released?

    Does anyone care?

    Is anyone else researching or calculating all of these?


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  • James2

    What lies.

    The fuel isn’t anywhere near the RPV. When they did the scope on it a few weeks ago they didn’t go into the RPV – they went into the containment and found so much radiation and corrosion that even they were surprised.

    Cold shutdown my ass – they’ve got a 4,000 gallon per hour pump running water probably right over the temp probe so the steam can’t get to it and run it up over 80 degrees. Simply so they can continue the lies.


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  • Pallas89juno Pallas89juno

    “cracked” How is MOLTEN, never cold, nuclear lava “cracked”. More layers of BS


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  • roberto

    Yeah, t3pco read ENE.
    well, a message for it: “t3pco, devi stiantà ! malidetto il buho dela tu’ mama maiela doddeci pocce!”
    e s’inse bono a tradurre, czzi tui!!”


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  • Alice Alice

    It’s turned into the Blob.

    I feel like I’m living in a B-grade science fiction movie and I’m just one of those extras who get killed off before the second scene.


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  • StPaulScout StPaulScout

    “TEPCO also speculated that the fuel, which had melted and then solidified”

    They have already admitted several times that they have no way of knowing this. They have no way of knowing what condition the fuel is in. They don’t even know where the hell it is for crying out loud, how could they possibly know what shape it is in…


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  • aigeezer aigeezer

    “TEPCO also speculated that the fuel, which had melted and then solidified, might have cracked due to some shock or dropped down and changed shape.”

    Parsing this for a few ambiguities:

    1. TEPCO… speculated that the fuel… had melted….

    2. TEPCO… speculated that the fuel… solidified….

    3. TEPCO… speculated that the solidified fuel might have cracked….

    4. TEPCO… speculated that the solidified fuel might have cracked due to some shock (such as an endoscopy)….

    5. TEPCO… speculated that the solidified (but shape shifting) fuel might have dropped down beneath any remaining containment….

    5. TEPCO… speculated that the solidified fuel… changed from its normal benign banana shape into a more sinister unknowable shape, but everything is OK.


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  • Clearly Tepco is incompetent or lying or both. I vote for both. Speculating where the spent fuel blob is,is unacceptable. Sounds like a 17 year old speculating what the funny sound is coming from his first old beater car. Oh but you clowns are running nuclear power generators. Everybodys health is dependent on your speculation.

    Interestingly, I looked up “cold shutdown” and found this:

    “Because the definition of a cold shutdown regards the state of the reactor itself, a reactor could be considered to be in cold shutdown even though the fuel from the reactor may no longer be inside the reactor containment vessel.[1]

    [1] = ^ NRC Definition of cold shutdown. http://www.nrc.gov/reading-rm/basic-ref/glossary/cold-shutdown.html

    So we are certainly dealing with semantic Bull$hit here. You go to the nrc website and cold shut down definition reads “The term used to define a reactor coolant system at atmospheric pressure and at a temperature below 200 degrees Fahrenheit following a reactor cooldown.” ok and cooldown is defined as “The gradual decrease in reactor fuel rod temperature caused by the removal of heat from the reactor coolant system after the reactor has been shutdown.” Even NRC doesn’t mention meltdown or melt through.

    Looks like I will have to edit Wikipedia. I don’t think that when we are speculating where the corium blob has gone (and according to the above article in the Shimbun they might not know until 2021) just because the cooling system is below a certain temperature doesn’t mean the reactor is in cold shutdown. I’m sure all you regulars have discussed this before but I feel its worth repeating.
    Even NRC defines cold shut down in terms of after a reactor has been shutdown. Not after a reactor has suffered an earthquake and tsunami and has melted fuel rods which have left containment and who’s location is unknown


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  • Sorry original quote regarding cold shut down came from Wikipedia

    http://en.wikipedia.org/wiki/Shutdown_%28nuclear_reactor%29


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  • Laterlukemayb Laterlukemayb

    Wish you geniuses at TEPCO would “CRACK” and start telling people the truth!


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  • Laterlukemayb Laterlukemayb

    Still don’t understand why TEPCO officials are still using ambiguous radiation numbers. The average person isn’t going to understand becquerels vs milliseverts and so on. This may be the very reason they are be ambiguous. I give it up for Hanford officials for at least keeping it in terms one can understand. 85 severts, I can understand that, if you live downriver or within 30 miles of the reserve, run like hell!


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  • john lh john lh

    Yes, Tepco’s new definition of cold shut-down.


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  • Replacant Replacant

    So in conclusion;
    Tepco has know idea where is the fuel-blob
    no idea how to contain it
    if its leaking into the ground water
    no idea how to cool it
    no idea how to put it in some other state other than a big blob at the bottom of a reactor

    When will the government bring in another group of scientist who can answer one or more of these questions? Fukushima meets the blob would be a funny movie, pretty horrifying since its real.


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  • hbjon hbjon

    It’s a living breathing true story horror movie playing for those who won’t be bamboozled by all the lies. Each day seems to open a new chapter. I am not looking forward to Steven Kings “The Stand” unfolding outside our homes while we tap away at our keyboards.


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