UN Radiation Expert: Neutron exposure from Fukushima criticalities not measured

Published: May 25th, 2012 at 10:50 am ET
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Fukushima-exposed children and workers ‘OK for now’
New Scientist
Andy Coghlan
May 25, 2012
Emphasis Added

[...]

For the time being, we don’t see anything of major concern,” says Wolfgang Weiss, chairman of the [UN Scientific Committee on the Effects of Atomic Radiation (UNSCEAR)].

[...]

The committee has demanded more information and data on how the doses were assessed, and UNSCEAR should have detailed ultrasound thyroid scans on 300,000 children from the hotspots around Fukushima within the coming weeks. But Weiss says, “The data we’ve seen for the children is reassuring.”

[...]

The committee has also demanded more information on how worker doses and exposures have been established, and what assumptions were made in calculating them. For instance, Weiss says that in the early days of the disaster, some workers may have been exposed to high-energy neutrons as fuel melted and went critical, but there’s no exposure data because their dosimeters can’t detect neutrons.

[...]

Published: May 25th, 2012 at 10:50 am ET
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7 comments

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7 comments to UN Radiation Expert: Neutron exposure from Fukushima criticalities not measured

  • arclight arclight

    and this from the front page.. INDEPENDENT?? ??

    "…Fukushima-exposed children and workers 'OK for now'

    10:15 25 May 2012
    Independent UN experts say radiation doses to children low, but some highly exposed workers face a more uncertain future…"

    and some form on the little bugger here

    http://enenews.com/london-professor-weve-stop-sorts-reports-coming-intl-conference-warns-talk-fukushima-health-effects-be-harmful/comment-page-1

    the japanese have destroyed the first five days of radiation data .. so, no surprise that they are only measuring banana skins..

    new scientist.. fair and balansed?? scientific (means pro oncology child killers imo)… new means "straight of the printer" via the corporate advertisers and sponsors.. the same sponsors that "guide" the UN.. ho hum!

    taliking about resistant bacteria, i offer you this redacted version but otherwise untouched, interview with the big man himself!! the mastermind behind the “like ceasium in your food ADK backed advert! tourism, buisness and the internet.. think telecommunications to!! like mobile phones (thanks for that)

    any way… bacteria!!

    Emphasis added! But nothing else! Enjoy! Oh yeah!!
    Ogilvy & Mather Japan
    By Chris Betros
    Executive Impact Jan. 09, 2012
    Overseeing operations in Japan is Kent Wertime. here’s what he had to say!!

    cont


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  • "…NEXT MAY, after incorporating additional data from the "Japanese authorities, US military and navy vessels exposed to fallout from Fukushima, and local surveys of sediments, fish and other marine life. Also, to assess the risks from food, the committee will analyze 130,000 samples of produce from around Fukushima gathered since the disaster by the UN Food and Agriculture Organization."

    Why do we have to wait another year for this? Why are 'they' not acting in a responsible manner??? Probably, the same reason they have lied and delayed information in ALL of these non-stop criminal acts of genocide.

    "For some of the 20,000 workers who've been laboring to bring the four stricken reactors at Fukushima under control, the outlook is less certain." – from article

    They are heroes to us, but nothing more than slaves to the Death Machine Operators! (Nuclear Power Industry)

    "no exposure data because their dosimeters can't detect neutrons." – from article

    Why? Again I say, "This is a load of crap!"
    Maybe THEIR dosimeters couldn't, but other devices can.

    Neutron detection:
    http://en.wikipedia.org/wiki/Neutron_detection#Fast_neutron_detectors


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  • Earthling

    "Weiss says that in the early days of the disaster, some workers may have been exposed to high-energy neutrons as fuel melted and went critical, but there’s no exposure data because their dosimeters can’t detect neutrons."

    Correct me if I'm wrong, but isn't that contradictory to what TEPCO said last year (that it measured a neutron beam):

    "Tepco said the neutron beam measured about 1.5 km southwest of the plant's Nos. 1 and 2 reactors over three days from March 13 and is equivalent to 0.01 to 0.02 microsieverts per hour. This is not a dangerous level of radiation, it added."

    http://www.japantimes.co.jp/text/nn20110324a6.html


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    • chrisk9

      Measuring Neutron radiation 1.5 km from the source at those levels is not a huge deal to people that far away. But to get any neutron readings that far away from the plant is shocking. And very dangerous on site. Distance decreases the dose rates greatly. What was the dose rate on site? And maybe more importantly, why were there neutron readings at all anywhere.

      When I first read the header I thought that the only place workers could be getting a neutron dose would be next to the fuel pools in units 3 and 4. Now I wonder what was going on to create a neutron dose. In an operating plant it is very hard to find any neutron dose anywhere because it is shielded by the pressure vessel, water and containment. Fuel melting through the bottom of containment would not cause readable doses.

      My best and only guess is that a fuel pool must have had a steady and long term criticality without much water to shield it. Wow


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