ACRO: Contamination from Fukushima meltdown is very large and comparable to environment of Chernobyl

Published: May 23rd, 2011 at 1:11 pm ET
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Results of ACRO’s monitoring in Japan (05/17/2011 update), l’ACROnique du nucleaire (ACRO), May 17, 2011:

The contamination is very large and comparable to the environment of Chernobyl. [...]

Iodine contamination is the largest and it is better to evacuate the population.

Regarding the results expressed in Bq/kg of soil, most of them are higher than the limit fixed by the Japanese authorities at 5 000 Bq/kg for agriculture. Rice cannot be cultivated.

The data expressed in Bq/m² can be compared to the definition of the zones in Byelorussia after the Chernobyl disaster (law of 1991) :

185 000 – 555 000 Bq/m²: migration allowed
555 000 – 1 480 000 Bq/m²: right to rehousing

Most of the results are higher than one of these limits.

See results here. (Scroll Down)

About ACRO:

ACRO is a NPO that was created just after the Chernobyl disaster in 1986 and has been monitoring radioactivity in the environment for 25 years together with the concerned populations. It runs a laboratory with the highest scientific standards that is accredited by the French authorities. Its activity is complementary to the official monitoring because it is aimed to answer to the questions of the population.

ACRO was involved during several years in a project in the contaminated areas of Byelorussia to implement radioactivity measurement stations in villages and develop a culture of radioprotection. The European Union and the Swiss ministry of foreign affairs supported our contribution.

Published: May 23rd, 2011 at 1:11 pm ET
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24 comments to ACRO: Contamination from Fukushima meltdown is very large and comparable to environment of Chernobyl

  • simple jack

    now,iam become death,destroyer of worlds


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  • ocifferdave

    ACRO sounds like a white knight we have been needing. Potentially like a large cool glass of water in a desert where our cries for radiation testing has been lost on the winds. I hope they test EVERYWHERE.


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  • EXTINCTION LEVEL EVENT (ELE)

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

    Trying to come up with a non-alarmist summary of the current situation at Fukushima.

    For instance, would it be correct to say that the fate of the planet actually – and really – rests with a few TEPCO workers in Japan (helped by some international scientists), and that there is a very real danger of a huge explosion that will blanket the earth and kill most of us off?

    Am I overstating? Or, understating?
    ——————————————-
    BACKGROUND INFO

    Corium, also called fuel containing material (FCM) or lava-like fuel containing material (LFCM), is a lava-like molten mixture of portions of nuclear reactor core, formed during a nuclear meltdown, the most severe class of a nuclear reactor accident. It consists of nuclear fuel, control rods, structural materials from the affected parts of the reactor, products of their chemical reaction with air, water and steam, and, in case the reactor vessel is breached, molten concrete from the floor of the reactor room.

    —-

    The temperature of corium can be as high as 2400°C in the first hours after the meltdown and can reach over 2800°C. A high amount of heat can be released by reaction of metals (particularly zirconium) in corium with water. Flooding of the corium mass with water, or falling of molten corium mass into a water pool, may result in a temperature spike and production of large amounts of hydrogen which can result in a pressure spike in the containment vessel. The steam explosion resulting from such sudden corium-water contact can disperse the materials, forming projectiles that may damage the containment by impact. Further pressure spikes can be caused by combustion of the released hydrogen. Detonation risks can be mitigated by the use of catalytic hydrogen recombiners.[4]
    —-

    However the dynamics of the movement of corium in and outside of the reactor vessel is highly complex, and the number of possible scenarios is wide; slow drip of melt into an underlying water pool can result in complete quenching, while a fast contact of large mass of corium with water may result in destructive steam explosion. Corium may be completely retained by the reactor vessel, or the reactor floor or some of the instrument penetration holes can be melted through.[9]
    ———–


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    • Poor Daddy

      Whether Fuckushima is the total catalyst for ELE or not is questionable, but it is most certainly a precursor of things to come. Nuclear disaster, global warming, biological warfare, famine, global plague, asteroid strike…..the list is long and we are flexible to a degree, but also very fragile.
      Too bad; I really liked it here!


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    • WindorSolarPlease

      Is this an ELE?

      I think it will be a slow death for some and for some a sooner death.
      I think it will depend on, where you are at.

      This earth has been contaminated for such a long time.
      It’s a miracle we are still here, with what this earth has been put through.

      I look at it this way:

      The cake has been baked,
      This is just the start of making the frosting.
      Eventually the candles.
      Then the ice cream, the best part is yet to come.

      I believe that the ELE will be by fire.


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      • xdrfox

        It was said years ago in a song lyric,
        “Someone left the cake out in the rain and we will never have the recipe again” !


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        • WindorSolarPlease

          Maybe that’s where I got it from?

          All I know is… I wish they would lose the recipe that has caused all this contamination.


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        • Anthony

          Good song, McArthur Park, Donna Summer … and people laugh at the old days. I would love to turn back the clock myself and start over. Never believed that way before this crisis.


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          • WindorSolarPlease

            I wasn’t really thinking of that song when I wrote that.

            I was really thinking of the ice cream, the best part.
            Instead of dwelling on doom and gloom.

            Ice cream means Gods Plan. He wins in the end.


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  • CORIUM-WATER EXPLOSIONS

    http://article.nuclear.or.kr/jknsfile/v41/JK0410603.pdf

    In a nuclear reactor severe accident molten core material
    (corium) containing a large fraction of molten fuel may
    enter into contact with the coolant, generating a so-called
    fuel-coolant interaction (FCI). In a LWR severe accident,
    melt-water interactions capable of resulting in a steam
    explosion with potential damage to the structures are those
    in which a large mass of corium melt can pre-mix with
    water before the explosion triggers somewhere in the
    pre-mixture and propagates through it, in a way similar
    to a chemical detonation [1]. Practically, this is only
    possible when the corium melt relocates into the waterfilled lower head of the reactor pressure vessel (in-vessel
    steam explosion) or in a flooded cavity (ex-vessel steam
    explosion). Thus, these situations have been given most
    attention so far and are the subject of this paper.
    A steam explosion can occur at any stage during melt
    penetration into water. It can be defined as a class of FCI
    in which a significant part of the energy stored in the
    corium melt of the pre-mixing zone is transferred to the
    w a t e r s o r a p i d l y ( i n m i l l i s e c o n d s ) t h a t e x p l o s i v e
    vaporisation of the water occurs, i.e., vapour is produced
    more rapidly than the system can expand, generating
    high pressure, dynamic loading of the structures and
    possibly missiles during expansion, thus converting
    thermal energy of the melt into mechanical energy of the
    coolant. This can result in damage to the reactor structures
    and, if it affects the containment, in release of radioactive
    fission products to the environment. Steam explosion risk
    evaluation requires being able to quantify the level of the
    generated loads in order to verify whether reactor structures
    can withstand them and possibly design appropriate
    counter-measure


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  • ray

    Thank you, Pu. That’s a very helpful piece of the puzzle as we work to develop a realistic vision of the range of possible outcomes.


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  • Jack

    ray…? you gotta underground base to run to? with full Cable-TV?
    Realistic Vision?
    Lay Not up your treasures where moth and rust doth corrupt.
    This World has been Lucifer/Satan’s management assignment, to weed
    out those who wanna go along with Satan/Lucifer….like, for example,
    all of your Code-of-Silence Masonic Police Fraternal Infernal Order of
    Criminal Conspiracy Police. Did you know that the Shriner’s hospitals
    allow an easy access for Satanists to have private contact with
    defenseless kids? Did you know ALL of your Chiefs of Police play Ball,
    or else get railroaded or just killed off?
    This is the REALISTIC world. The IDIOT cops will be there to Force you to submit to whatever their Poleece Gang wants to try to get away with.


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    • Heart of the Rose

      I wouldn’t count on the law enforcement section of our society.
      They have been aligned with the military through “buddy up” with Homeland Security and assume a para-military stance as we have seen on the GOM.


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  • Cassie

    What if the core already hit the water table?

    And the fog and mist everyone keeps seeing on the live cam is the resulting vapor? Several people have ruled out sea mist or fog. Looking more like vapor.

    A geologist on this site has been answering my questions. Don’t know where his posts are now, they get lost. At any rate he has said that when the core hits the water table, there may or not be an explosion. He has requested a geo map of the area, don’t know if someone gave him one.

    He says to keep in mind that a water table is not an
    underground lake or a bed of actual water. It is moisture in permeable rock. And the type of rock would determine explosion or not. He also points out that the back filled marsh could contain concrete, girders, god knows what, which may determine how the coring proceeds.

    I hope I have presented his material accurately, albeit in
    layman’s terms. And other posters have been asking them same question ( I think Kay) but I have not been able to find the responses.

    Thoughts anyone?

    Cassie


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  • rense.com

    When The Fukushima Meltdown Hits Groundwater
    By Dr. Tom Burnett
    3-27-11

    Fukushima is going to dwarf Chenobyl. The Japanese government has had a level 7 nuclear disaster going for almost a week but won’t admit it.

    The disaster is occurring the opposite way than Chernobyl, which exploded and stopped the reaction. At Fukushima, the reactions are getting worse. I suspect three nuclear piles are in meltdown and we will probably get some of it.

    If reactor 3 is in meltdown, the concrete under the containment looks like lava. But Fukushima is not far off the water table. When that molten mass of self-sustaining nuclear material gets to the water table it won’t simply cool down. It will explode ­ not a nuclear explosion, but probably enough to involve the rest of the reactors and fuel rods at the facility.

    http://www.rense.com/general93/whent.htm
    **********************************************

    Says it all – check out the date of article… seems to be playing out verbatim today.


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    • ** The Japanese are still talking about days or weeks to clean this up. That’s not true. They cannot clean it up. And no one will live in that area again for dozens or maybe hundreds of years. **


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  • Cassie

    What happens when volcanic ash and radiation join in the jet stream?

    I asked this before but it is lost in the enenews ethers….

    Any ideas? I think the Icelandic volcano is still erupting and could the ash co-mingle with radiation plumes?

    Would ash make the radiation worse, better or be a neutral??

    Thank you
    Cassie


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  • Disturbing:

    What if all those nuclear geniuses are just as wrong about a catastrophic melt-through as they were wrong over and over and over about almost everything so far?

    What if the melting core doesn’t simply explode and disperse when it hits some “concrete and other materials” directly under the containment vessel, but burns right though a few more meters of “concrete and other materials” and hits the water table under Fukushima NPP? And at beautiful beach-side Fukushima NPP, the water table isn’t nearly as far down as the water table under Chernobyl!

    So what’s the worst case now, if we consider the not exactly unimaginable possibility that a melting core doesn’t immediately explode and disperse when it hits some concrete, but burns a few feet more down into the water table under Fukushima NPP?

    So instead of dropping a molten ball of uranium and plutonium into a relatively small pot of water, you drop it into something more like a bath-tub instead.

    Could you produce a big enough explosion to destabilize all those already leaky pools that barely cover 1700 tons of radioactive junk?

    http://www.docudharma.com/diary/25579/worst-case-at-fukushima-an-international-coverup


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  • Nuclear Experts Explain Worst-Case Scenario at Fukushima Power Plant

    “The containment, I believe, is still intact. But if the core does melt, that insult will probably not be sustained and the containment vessel will fail. All this, if it were to occur, would take a matter of days. What’s crucial is restoring AC power. They’ve got to get AC power back to the plant to be able to control it. And I’m sure they’re working on it.”

    http://www.scientificamerican.com/article.cfm?id=fukushima-core


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  • Russian fires spark nuclear radiation fears

    Norman Hermant reported this story on Friday, August 13, 2010 08:19:00

    *TONY EASTLEY: The toxic smog may have lifted in Moscow but wildfires in Russia are still raging and concerns are growing about the impact the fires will have on sensitive nuclear sites.

    Authorities are downplaying fears that flames in areas near Chernobyl might spark radioactive smoke but the environmental group Greenpeace says there are good reasons to be concerned. *
    http://www.abc.net.au/am/content/2010/s2981719.htm


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  • Seer

    Aren’t you guys embarrassed by your self-reinforcing anti-scientific panic mongering yet? Try actually learning a bit of the science behind what’s going on and you won’t be humiliating yourself with biblical conjectures.


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