For the month of November 2011, one pre-schooler in Koriyama City in the high-radiation "Nakadori" region in Fukushima Prefecture was found with 0.66 millisievert of external radiation exposure. The maximum number for the pregnant women was 0.36 millisievert.
On an annualized basis, 7.92 millisieverts from external radiation alone for the particular child, and 4.32 millisieverts for the pregnant woman. The average for the children was 0.11 millisievert, which would be 1.32 millisievert in one year. The average for the pregnant women was 0.10 millisievert, which would be 1.20 millisievert in one year.
Just a friendly reminder: Before the Fukushima I Nuke Plant accident, the natural "external" radiation exposure average in Japan was 0.59 millisievert per year.
Another reminder: Koriyama City started fitting the children and pregnant women with glass badges starting November 2011. There is no way of knowing what the radiation exposure may have been in the earlier months.
Yomiuri Shinbun (1/6/2012):
福島県郡山市は６日、市内の未就学児と妊婦の昨年１１月の１か月間の個人積算線量の測定値で、未就学児１人から０・６６ミリ・シーベルト、年間換算では７・９２ミリ・シーベルトと比較的高い線量が測定されたと発表した。
Koriyama City in Fukushima Prefecture announced the result of cumulative radiation exposure in the month of November 2011 for the pre-school children and pregnant women in the city. One child was found with 0.66 millisievert of radiation exposure, which would be 7.92 millisieverts for the annual cumulative exposure, a relatively high figure.
市では「今のところ健康に影響を与える数値ではないが、今後も調査を継続して対応していきたい」としている。
The city says "It is not the level that immediately affect health, but we want to continue to monitor."
平均値は未就学児が０・１１ミリ・シーベルト、妊婦が０・１０ミリ・シーベルトで、妊婦の最高値は０・３６ミリ・シーベルトだった。
The average figure for the pre-schoolers was 0.11 millisievert, and for the pregnant women 0.10 millisievert. The maximum number for the pregnant women was 0.36 millisievert.
市は昨年１０月末から、保育園や幼稚園、希望者を対象に約１万６４００個の線量計を配布。同１１月の積算の放射線量を測定してもらい、妊婦８９６人と未就学児１万５２３９人から回収した。
The city distributed 16,400 glass badges to children in the city's nursery schools and kindergartens and to people who wanted to be fitted with the badges. The cumulative radiation exposure for the month of November was recorded, and the city collected the badges back from 896 pregnant women and 15,239 pre-schoolers.
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14 comments:
They are going to let them all die.
this # does not even include internal hot particles... badge can't pick that up!
Here's something recent on low-dose radiation,
"The researchers used time-lapse images of cells as they responded to various radiation doses. They were able to see the repair proteins concentrate around parts of DNA that had suffered a double strand break in what are called radiation-induced foci (RIF). Over time the severed ends of DNA strands actually moved within the cell nucleus to gather in larger RIFs known as 'repair centres'. "
Note how they forgot to mention that the doses they administered were doubtless one-time events.
Contaminated environments are no such things as one-time events.
Overwhelm an already slow process with more events than it can handle and the battle is lost.
"Sylvain Costes, who led the study, said that multiple repairs could be taking place simultaneously in the repair centres, leading to more errors in the repaired DNA. He said that at low levels of radiation, such as the natural levels humans experienced throughout evolution, it was "unlikely" that any cell would have to repair more than one double strand break at once. "
http://www.world-nuclear-news.org/RS_New_data_on_low_dose_radiation_2112111.html
OT - if you ever get any information regarding why cesium is falling again especially over Fukushima and Chiba please post it? Professor Takeda is telling us to stay indoors if possible.
http://takedanet.com/2012/01/post_7b54.html
I would also like to ask that if you have any information on the increase in caesium emissions recently, please post it. I've read various levels, 4x, 10x, but it went up suddenly from a few days at the New Year when the government abruptly stopped releasing data.
Also, "the natural "external" radiation exposure average in Japan was 0.59 millisievert per year." Shouldn't this be 0.059? If 0.66 is relatively high, I would think 0.59 is also relatively high.
Thanks, mate!
@anon at 5:11PM, 0.66 millisievert for a toddler in Koriyama City is in ONE MONTH. 0.59 millisievert is in ONE YEAR average.
I read a Japanese report and realised I had misunderstood. The government's embargo of the data was apparently not due to the holiday but because the government will henceforth refuse to provide data on the weekend. The government said this weekend blackout of information is appropriate because the data show declining emissions. But in fact, the date from the beginning of this month show the opposite, a drastic increase in emissions of caesium. The increase in caesium seems to have started after the January 1st earthquake.
Sorry, mate!
@anon 5:20
Here is a link showing a drastic increase on 1/2.
http://radioactivity.mext.go.jp/ja/1285/2012/01/1285_010618.pdf
"Contaminated environments are no such things as one-time events.
Overwhelm an already slow process with more events than it can handle and the battle is lost."
The repair process runs inside a cell. Damage to a specific cell IS a one-time event.
If there is continuous damage to the SAME CELL, we are no longer talking about low-level radiation :)
"If there is continuous damage to the SAME CELL, we are no longer talking about low-level radiation :)"
It is called "low level" radiation because the average appears low.
"Hot particles" cause localized high-radiation spots in the body.
You could call these "cancer seeds" in some ways.
As Fukushima children's urine contains quite a lot of plutonium, it cannot be denied that they have quite some of these "seeds" incorporated.
Mrs. Siedentopf described the practical consequences very well (see next Ex-SKF blog article. I'll try to translate parts of the big article the next days.)
Anyway, this increase of Caesium levels and the recent issue of potassium iodide to the people near the plant after the last quake looks somewhat worrying.
Maybe there something in the core wreckage crashed down, creating radioactivity releases and the (remote) possibility of a critical configuration, thus the handing-out of KI pills?
I've never seen anything that suggested a lot of plutonium in Fukushima children's urine. You have anything to back that up?
"The repair process runs inside a cell. Damage to a specific cell IS a one-time event.
If there is continuous damage to the SAME CELL, we are no longer talking about low-level radiation :) "
Micromanaging the conceptualising is not going to help the radiated.
You are continually being showered with cosmic ray cascade particles, what you would call low-level radiation. It's probably where your blue eyes mutation came from. :)
And those SAME CELLs you mentioned, will they dump injury products in the bloodstreams, signalling damage to the body ? Will other CELLs respond to those products ?
Heh, will the "nukelubed" feel free to acknowledge statistical certainty by introducing destabilised nucleii to an environment that lacked those nucleii beforehand ?
Will the Koch Bros. acknowledge they had a hand in this ?? Huh ?!!
Same as red & aquamarine crayons will no longer be available, and Rumsfeld telling us there will be no more unknown unknowns [?] , a contaminated environment will no longer enjoy an un-assaulted immune system.
:)
And 6:03, here's a perfectly intructive case for a challenged student like yourself,
I was talking to a guy over the summer who had a friend who did some SFP dive inspections. NRC either requires them or they suspected they had a leak in their SFP at a reactor in the U.S.
Good pay for the dive, wetsuits and airtanks.
They test the divers for radiation levels before and after.
Diver's exposure level before the SFP inspection indicated no cesium level detected, I believe they test internal level.
After the dive(s) they detected cesium, he'd been contaminated at a low level.
The people of northern Japan have been forced to 'dive'.
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