New indoor radiation dose record at Fukushima — 5 sieverts per hour detected at Reactor No. 1 — May be higher as it exceeded capacity of measuring device

Published: August 2nd, 2011 at 9:22 am ET


High-level radiation detected again at Fukushima Daiichi plant+, AP/Kyodo, August 2, 2011:

[… TEPCO] said radiation dosages of 5 sieverts per hour were detected indoors on the second floor of the No. 1 reactor at the plant. The amount is the highest figure for indoors.

The figure was detected in front of a pipe in an air-conditioning machine room, the utility said, adding the dosage may be larger than the measured amount as it exceeds the capacity of measuring equipment.

On Monday, Tokyo Electric said radiation doses of as high as 10 sieverts per hour were detected outside the buildings for the No. 1 and No. 2 reactors.

On Tuesday, Tokyo Electric also announced more than 10 sieverts per hour were detected near the scene. […]

Published: August 2nd, 2011 at 9:22 am ET


Related Posts

  1. NYT: Fatal Radiation Level Found at Fukushima — “Exceeded” 10 sieverts per hour, measuring device was maxed out August 2, 2011
  2. Radiation at Reactor No. 1 skyrockets — Now over 200 Sieverts per hour May 23, 2011
  3. 10+ sieverts per hour means there is direct exposure to fuel rods: Australia’s former top radiation official August 2, 2011
  4. Up to 1,000,000 sieverts per hour outside Fukushima Unit 1 containment vessel — Still too hot to attempt measuring other areas (PHOTO & VIDEO) October 16, 2012
  5. CNN: “Strange green glow” seen inside Fukushima reactor — “Yellow, blue-green and other colors could be seen” — Radiation dose hits record high near 50 sieverts per hour — 15 seconds of video removed just before levels spiked 1,000% (VIDEO) April 20, 2015

19 comments to New indoor radiation dose record at Fukushima — 5 sieverts per hour detected at Reactor No. 1 — May be higher as it exceeded capacity of measuring device

  • Edward Edward

    How long before the planet it no longer inhabitable? Our food and water supply is being threatened and the only thing the U.S. government and media cover is royal weddings, sports and financial problems.

    • James2

      Don’t worry. We can’t do anything to damage the planet. After a couple million years or so, the planet will be cleansed and the same as it was before man. At that point, there will be very few remnants of our existence left behind.

      It’s a relatively short period of time when you’re talking about planet history, and I’m quite certain some sort of life will live survive whatever we can throw at them.

      Now if you’re worried about your gene pool surviving – well, that’s looking a little tenuous right now.

      If Fuku doesn’t take humans out, then there are hundreds of other Nuke plants waiting to take that distinction, and at the current rate of a major disaster every 10-20 years, then mankind cannot have more than about 200 years left of existence – max. Do the math with the information that Fuku has given to us, and there is no other conclusion to come to.

      Mankind’s only hope is that Fukushima is a narrowly missed but harrowing experience for our population – which causes us to change the safety factor of our technology by about 1000 to 1.

      This would extend the major nuke accident rate to every 10,000 -20,000 years, which is probably much more survivable.

    • Pallas89juno

      Good question. We shouldn’t leave that up to billionaires to tell us through maintenance of their covert, parasitic and ecosystem destroying leadership status quos, should we.

  • Agapit

    Melt-down. Melt-through. Melt-out. All hell is breaking loose.

  • Steven Steven

    It may be that the corium/s is/are entering some new phase and emitting more radiation, as far as I can ascertain the physics beyond meltdown is largely guesswork. Anyone have a better handle on this?

    • farawayfan farawayfan

      It’s probably been emitting like this for months. Now we have to see how bad the contamination from these exposed, leaked cores is. Won’t be good.

    • Misitu

      Guesswork, agreed, Steven. Gas, solid, liquid, phases of isotopes of various elements all muddled up and changing into different elements at their individual decay rates.

      I left out the concrete debris and melted steel to keep the calculations simple!

  • sueec

    I wonder how many disposable workers have been irradiated?

  • jec jec

    Sounds like the government is starting to worry as well”
    “State Minister Goshi Hosono, who is in charge of the nuclear accident, called Tuesday for correctly analyzing the situation, saying at a news conference that a correct grasp of the situation is essential to settle long-term issues involving the Fukushima Daiichi plant that was crippled by the March 11 earthquake and tsunami. ”
    Ya think?

  • radegan

    Yes it pinned the meter at 5 SV/hr, who knows what the actual reading was. So I predict TEPCO will now replace those meters with ones that only measure up to 100 milliSV/hr. remarking ‘they are more accurate’.

  • charlie3

    Perhaps TEPCO ought to consider buying radiation detectors that go higher than 10 sieverts.
    Just a thought.

  • StillJill StillJill

    Not if you want to hide the sausage,…sorry,.that’s what I feel they are trying to do to us all.

    Lovin’ that Prof. that went ALL FUKU on them! If he is also Japanese, where did his HOTSAUCE (fire in his belly) come from? I mean it,…he is the very first person from Japan who has emoted ANYTHING like what I feel is ‘normal’ or warranted! Even the pee’d off parents,…are still practically bloody BOWING when they ask questions-IMO!

  • catweazel

    Corium (and also highly irradiated uranium fuel) has an interesting property: spontaneous dust generation. dust means very very very fine particles (submicron, travels everywhere like a gas). may be known because found here:
    nevertheless it seems worth a mention when some ask for the source of such a high radiation. in case that happens down there good night. internal radiation loves submicron particles and whereever the wind blows there is dead land to be detected.

    • Misitu

      Thanks for reminding us of that which I’d forgotten, I think it is called micro-spallation. Basically the corium which is a sort of rather impure glass and sort of solid is also because of the transmutation (alpha decay) changing into elements with different physical characteristics – like density, and thermal conductivity – which make the solid try to behave like a boiling liquid with gas bubbles being generated in it all the time.

      Maybe someone can put this better, or fix it, but to me it works as a first cut picture.

      • Misitu

        Not Spallation, but Sputtering…

        Corium (nuclear reactor) From Wikipedia, the free encyclopedia
        “Degradation of the lava:
        “Corium (and also highly irradiated uranium fuel) has an interesting property: spontaneous dust generation, or spontaneous self-sputtering of the surface.
        “The alpha decay of isotopes inside the glassy structure causes Coulomb explosions, degrading the material and releasing submicron particles from its surface.
        “However the level of radioactivity is such that during one hundred years the self irradiation of the lava will fall short of the level of self irradiation which is required to greatly change the properties of glass.
        “Also the rate of dissolution of the lava in water is very low suggesting that the lava is unlikely to dissolve in water.
        “It is unclear how long the ceramic form will retard the release of radioactivity. From 1997 to 2002 a series of papers were published which suggested that the self irradiation of the lava would convert all 1,200 tons into a submicrometre and mobile powder within a few weeks.
        “But it has been reported that it is likely that the degradation of the lava is to be a slow and gradual process rather than a sudden rapid process.
        “The same paper states that the loss of uranium from the wrecked reactor is only 10 kg (22 lb) per year. This low rate of uranium leaching suggests that the lava is resisting its environment. “

        • Sickputer

          Yes…that is a good read for a Wikipedia article as sometimes the editors get out of hand. One of the referring documents about Chernobyl is excellent…

          Chapter 1 gives a historical overview of the campaign to stop the fires and the corium.

          Chapter 2 tells of the radionuclides and their spread and longevity.

          Reading it you get the feeling Japan is so far past the magnitude of Chernobyl that the fears for the destruction of hundreds of miles around Fukushima Daiichi may very soon (within weeks or months) become a grim reality.

          Every one in Japan is holding their breath wondering if the near future includes the contamination of Tokyo beyond evacuation standards set at Chernobyl. Barring a miracle the destruction of Tokyo seems more likely than ever.

          Now you know why the politicians were talking about moving the capital so many months ago, They have information we are not able to obtain.

  • catweazel

    and i wonder if the filter system is able to filter such a sludge.