Tepco: Recriticality “probably” did not occur at Reactor No. 2 — “Difficult to judge” whether temperature rising or falling

Published: February 7th, 2012 at 8:25 am ET
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Title: Reactor No. 2 heats up, gets more water
Source: Kyodo
Date: Feb. 7, 2012

[...] the amount of water injected into reactor 2 on Tuesday [is] the highest level since the plant achieved cold shutdown in December as concerns grew over rising temperatures [...]

[...] Tepco needed more time to assess the effectiveness of the step.

“It is difficult to judge whether the temperature is rising or dropping unless we monitor the development for about a day,” [Tepco spokesman] Matsumoto said.

[...] Reactor 2 is now being cooled with 13.5 tons of water per hour, up from 10.5 tons. The boric acid is being used to prevent a sustained nuclear chain reaction, or recriticality. [...]

Tepco said it also believes recriticality probably did not occur because it did not detect radioactive xenon [...]

Nuclear disaster minister Goshi Hosono

  • [He] told reporters that Tepco is making every effort to lower the temperature
  • “It has become clear that there is a possibility (the replacement work created) an unstable situation temporarily.”
  • “We have to consider matters in an even more careful way”

Read the report here

Published: February 7th, 2012 at 8:25 am ET
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13 comments

Related Posts

  1. Off the Scale: Reactor No. 2 temperature exceeded 400°C — Tepco says device broken — Reporter asks about recriticality February 13, 2012
  2. TEPCO trying to “prevent re-criticality” at Reactor No. 3 — Temperature soaring in pressure vessel, up over 100°F in 24 hours even after increasing water injection May 15, 2011
  3. Nuclear Industry Website: Recriticality test detects “very low traces” of fission products at Reactor No. 2 — Tepco then injected boric acid as a precaution against chain reactions February 7, 2012
  4. 82°C at Reactor No. 2 — Keeps rising even after injection of more water — Tepco “set to dump in boric acid” February 12, 2012
  5. Bloomberg: “Nuclear reaction threat” as temperature rises — Head of Japan nuke institute: “Nobody is sure about the location of melted fuel — A similar incident will probably occur again” February 7, 2012

13 comments to Tepco: Recriticality “probably” did not occur at Reactor No. 2 — “Difficult to judge” whether temperature rising or falling

  • Whoopie Whoopie

    COLD SHUTDOWN LIE EXPOSED!! Bloomberg: Tepco Tackles Nuclear Threat as Fukushima Plant Temp. Rises http://bloom.bg/xCqHLX Nobody is sure about the location of melted fuel
    5 minutes ago
    “It was too early to say the plant is safe in December. They declared cold shutdown even though nobody is sure about the location of melted fuel,” Tetsuo Ito, the head of the Atomic Energy Research Institute at Kinki University in western Japan. “A similar incident will probably occur again.”


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  • or-well

    wait a sec -2 days ago the water pumping went from 8.6 to 9.6 tons now its 13.5 up from 10.5 tons an hour. jus sayin…


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  • radegan

    “Probably, maybe, who knows if it’s up or down.” Gosh, that built my confidence up.


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    • radegan

      I can see the last human, rotting sores on his flesh, bowing before the great statue of the god Hormesis, He of the Broken Promises.

      “But we were all supposed to get radiant, and live longer and healthier….and I’ve smiled, I’ve always smiled – see, I’m weeping for humanity itself but still smiling…can you hear me, Lord Hormesis?”


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      • Jebus Jebus

        Then knowing what to do, the last human, pulls the pin on the old hand grenade he found and saves the world….


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        • Whoopie Whoopie

          TACOMA GROOVE (if memory serves me) wrote this a few months ago and it fits here:

          “10,000 humans were found dead in coastal regions of the USA from unknown causes. Researchers noted hair loss, bruises, bleeding, oozing sores, and swollen glands. Most of the victims had been sleeping on the ground and were unemployed and homeless. I fear this is a headline that won’t be published. Radioactive gases will move slowly along the ground as they are much heavier than normal atmosphere. Geiger counters show activity when you put them where the radionuclides are.(on the ground)Hey human, you are not immune to the toxic clouds of zenon and krypton.


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  • Whoopie Whoopie

    OT (very important)
    Just saw this on CSpan….please sign it!!
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    If 25,000 people sign our petition within the next 30 days, the White House will respond. The bar is high, but with your help we can clear it.

    Sign the petition now.
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  • DukeNukem4ever DukeNukem4ever

    Sorry to double post this (on the Bloomberg headline post … way down) but this might be a bit curious given that a re-criticallity might have occurred:

    “hey all … just to let you know, my PRM-8000 always-on geiger counter woke me up today at 4:21 am (night from Feb 6 to 7, Mon to Tue) with the rad alarm levels set to 0.7 usv/hr … the “normal rads in my home here in South Korea, Chuncheon are 0.36 usv/hr … so I set the alarm to twice that … and it has not gone off in the last few weeks … until last night …

    I don’t know if anything happened at that time or if it was a fluke … since when I woke up and turned on the backlight on the unit the levels had “gone down” to 0.6 usv/hr … which is the “normal” high level (0.22 to 0.6 most of the time, indoors … outdoors it is around 0.31 at the lowest and goes over 0.7 on in some areas with an average of around 0.46 usv/hr)

    also, it seems that I am living in a hot spot since when I went on a “rad survey trip” to Seoul on the weekend the highest rad levels I found were 0.28 usv/hr and lowest 0.05 !!! I had never seen such a low reading since I got my geiger counters (Inspector alert and the PRM-8000)

    anyways I just wanted to share.”

    I am not sure about the timing but it might be correlated …


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  • pure water

    Rread between the lines! There is a problem, which can question everything else, and they announce the temperature problem. Is it reactor 2? No way to tell. But watch everything else near by. And take cere, all of you, reading here. Thinking, questioning people are needed now!


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  • harengus_acidophilus harengus_acidophilus

    Some kind of mad poetry:
    “It is difficult to judge whether the temperature is rising or dropping”

    Sonds like:
    “Is this a valley or a mountain?”
    “That’s difficult to judge.”

    h.


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