Kyodo: Cumulative radiation doses at Fukushima Daiichi increase 16-fold — Measures needed to reduce exposure

Published: July 25th, 2012 at 10:10 am ET
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Follow-up to:

(Subscription Only) Title: Cumulative radiation doses at Fukushima Daiichi increase 16-fold
Source: Kyodo News
Date: July 25, 2012

Cumulative radiation doses for workers at the crippled Fukushima Daiichi nuclear power plant over the one-year period since the start of the disaster increased roughly 16-fold from the previous year, data compiled by the plant operator showed Wednesday.
The surge is partly attributed to an increase in the number of workers at the Tokyo Electric Power Co. plant who engaged in containing the nuclear disaster, and to the elevated levels of radiation in which the workers had to work in doing so.

The data apparently point to the need for measures to reduce workers’ radiation exposure, such as by making increased use of robots

[...]

Published: July 25th, 2012 at 10:10 am ET
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18 comments to Kyodo: Cumulative radiation doses at Fukushima Daiichi increase 16-fold — Measures needed to reduce exposure

  • arclight arclight

    a little history here..

    APPENDIX B
    Frequently Asked Questions: Section III, “Health Physics”

    NOTES: All questions and answers in this appendix relate to the Fukushima Daiichi nuclear power station. Unless otherwise indicated, all dates in this appendix are for 2011.

    "..The maximum external dose recorded is 199 mSv, and the maximum internal dose that has been calculated is 590 mSv. The maximum total dose recorded to a worker was 670 mSv, and a total of six workers have received doses in excess of the emergency dose limits established. Although 408 workers have received doses above the normal annual limit of 50 mSv, the average dose for emergency workers is still relatively low and has decreased steadily during the months following the accident. For workers performing emergency work since March, the average total accumulated dose is 22.4 mSv. For the months April through July, the average dose is <4 mSv. The totalcollective dose for all emergency workers is estimated to be 115 person-Sv.
    In addition to whole-body doses, two male employees received significant skin dose while laying electric cables, from standing in contaminated water that flooded their boots. The estimated skin dose was ~2 to 3 Sv. As of the most recent monitoring period, no observable health effects have been found in any of the workers…"

    http://fukushima.ans.org/inc/Fukushima_Appendix_B.pdf


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    • arclight arclight

      into the belly of the beast for some isotopic cover up here.. but the pictures are sooo pretty

      ANS Annual Meeting
      Special Session: The Accident at Fukushima Daiichi—
      Preliminary Investigations
      June 28, 2011

      reported dose to workers page 26

      Dose Category (mSv)then figures following are.. External, Internal and Total

      >250 0 6 8
      200-250 0 3 6
      150-200 7 7 21
      100-150 17 13 67
      50-100 116 100 215
      20-50 297 321 417
      10-20 527 369 392
      <10 2762 1548 1241
      Total 3726 2367 2367

      http://www.ans.org/misc/FukushimaSpecialSession-Caracappa.pdf


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  • armin zane

    *cough cough bullshit cough*
    covering dosimeters with lead?
    go to another nuke plant and accumulate again?
    work for another sub sub sub contractor and start all over again?


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  • or-well

    And when they seek medical care:

    "No imminent threat! No cause for worry!
    Oh…we mean too long ago, awfully sorry,
    no causative links.
    Same old story; negligent worker,
    stress, radio-noia,
    caused your 'heart blinks'
    or illicit drugs -
    were you Yakuza employa?
    Go ahead, chase your case
    all over Japan,
    for all those like you
    we've got a good plan -
    we'll deflect and cost you plenty of yen
    or make you an example all will understand.
    When you get desparate from Justice denied,
    we'll see what it takes for your silence to buy."


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  • Heart of the Rose Heart of the Rose

    @ or-well..I agree with arclight.
    A great piece..
    We all thank you.


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  • SteveMT

    Are there any of the original Fukushima 50 still working? I hope not, but where are these brave workers now, and what is their health status TEPCO? [sound of silence]

    Fukushima 50 battle radiation risks as Japan nuclear crisis deepens
    Workers in protective gear – known as the Fukushima 50 – encounter myriad problems as Japanese PM demands answers
    Tuesday 15 March 2011 14.39 EDT
    http://www.guardian.co.uk/world/2011/mar/15/fukushima-50-workers-nuclear-plant


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    • snowwy snowwy

      Over 20 workers had been injured by 18 March, including one who was exposed to a large amount of ionizing radiation when the worker tried to vent vapour from a valve of the containment building.[1] 3 more workers were exposed to radiation over 100 mSv, and 2 of them were sent to a hospital due to beta burns on 24 March.[11] Two other workers, Kazuhiko Kokubo, 24, and Yoshiki Terashima, 21, were killed by the tsunami while conducting emergency repairs immediately after the quake. Their bodies were found on 30 March.

      http://en.wikipedia.org/wiki/Fukushima_50


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      • snowwy snowwy

        i doubt that any of those are working now as they must have topped their annual limit more than once during the first few days and weeks. Tepco repeatedly points out that there is a lack of new workers that have not had their annual radiation dose.


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        • richard richard

          i've done some rough maths to guestimate the number of people required versus exposure rates..

          http://enenews.com/ap-growing-concern-govt-tepco-about-keep-getting-people-work-fukushima-daiichi/comment-page-1#comment-274089

          it equates to "there should be bus loads of workers arriving at this site every day"

          until you see such activity you can guess any resolution is still at the very minimum one year away. for one reactor, for one area.

          these guys at tep.guv are doing nothing. they have no money nor inclination.

          they are taking us all for a ride. a one way journey. don't pay the ferryman.


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          • Excellent Analysis Richard

            I've thought there was no one at the plant for a long time (others here have thought the same).

            I think workers go there only for absolutely critical tasks (who knows how that is decided)

            and for photo ops…

            Most of the cranes are remotely activated.

            That is why they are throwing fuel into the ocean.

            It is the least expensive way of doing anything at all and it will effectively endanger the pacific coast of N. America (an area of the world very much involved in developing nuclear).

            Someone mentioned that the fuel thrown into the ocean will be encased in concrete – some solution that is…

            Apparently the rest will be allowed to fission away on the surface of the earth until exhausted….

            The resources and know-how of many, many nations must be brought to bear on this problem.

            But our leaders are corrupt and greedy so we will all be slowly poisoned.

            I don't know how badly. There has been debate here about that issue.


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  • MaidenHeaven MaidenHeaven

    The cumulative dose has to be far above what is reported. From the venting of Reactor 2 one example is "March 14th/2011 21:37 JST, radiation levels at the front gate had reached levels where annual limits would be exceeded in ..*20 minutes.

    Another release just minutes later "Around 22:50 JST, pressure levels in the Dry-Well exceeded the maximum usage pressure, and within 40 minutes workers were forced to attempt to vent the pressure out of the system by opening a small valve in the D/W vent. This drywell vent may be attributed to a large radiological release from Reactor 2.

    March 15th/2011 After the explosion & another pressure increase "radiation levels outside the Unit 2 reactor were reported to have risen sharply to over ..400 millisieverts an hour. Even at that rate, a mere …*7 minutes of exposure would effectively cause a worker to exceed the maximum annual dose allowed, and 75 minutes of exposure would likely lead to the subject exhibiting symptoms of acute radiation sickness.

    http://enformable.com/2012/07/tepcos-do-or-die-mission-to-save-a-nuclear-reactor-may-have-caused-largest-radiation-leaks-during-fukushima-disaster/


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  • rambojim

    Tokyo Electric Power Company,in an effort to contain the nuclear disaster,and to reduce the elevated levels of radiation for the health of the workers,will,starting immediately,require all workers dosimeters to be covered by a lead shield….


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