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Japan earthquake - contamination & consequences outside Fukushima NPP

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Caniche
#325
Sep26-11, 06:12 PM
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Quote Quote by Azby View Post
I wonder if we're talking about the same geographic locations. Unless my translation is hazy (and they often are) the statement refers to the most highly contaminated areas within the 20km exclusion zone as well as less contaminated ones. Maybe you were thinking it was only the latter? Like the rest if us I'm wondering who was thinking they'd be able to go back and live in an area where the ground contamination is over 3,000,000 Bq/m2, but apparently the gov't has really avoided coming out and saying this until now, and many people were holding out hope.
Well they say it springs eternal, but you might ask if 56,000 years is pushing it a bit
tsutsuji
#326
Sep27-11, 06:00 AM
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The evacuation-prepared zone will be lifted Friday:
The five municipalities have already submitted to the government their recovery plans, a precondition for lifting the advisory which covers all of Hirono and parts of Naraha, Kawauchi, Tamura and Minamisoma, all in Fukushima Prefecture.
http://www.tmcnet.com/usubmit/2011/09/27/5807576.htm
Japan Focus is publishing "Fukushima Children at Risk of Heart Disease" by Chris Busby with an introduction by Mark Selden : http://japanfocus.org/-Mark-Selden/3609 . I tried to find basic knowledge on the "Chernobyl heart" disease, and found http://en.wikipedia.org/wiki/Chernobyl_Heart . It is mostly an article about a film, but it links to a medical publication : "Radiation induced cardiac valve disease in a man from Chernobyl" : http://www.ncbi.nlm.nih.gov/sites/en...&term=19647162
Shinjukusam
#327
Sep28-11, 03:09 AM
P: 35
Quote Quote by tsutsuji View Post
The evacuation-prepared zone will be lifted Friday:


Japan Focus is publishing "Fukushima Children at Risk of Heart Disease" by Chris Busby with an introduction by Mark Selden : http://japanfocus.org/-Mark-Selden/3609 . I tried to find basic knowledge on the "Chernobyl heart" disease, and found http://en.wikipedia.org/wiki/Chernobyl_Heart . It is mostly an article about a film, but it links to a medical publication : "Radiation induced cardiac valve disease in a man from Chernobyl" : http://www.ncbi.nlm.nih.gov/sites/en...&term=19647162
Just wanted to point out that pretty much anything having to do with Busby should be taken with a pretty large grain of salt

Feel I need to be pointing out the other side of the "it's not science, it's propaganda" discussion.
tsutsuji
#328
Sep29-11, 04:26 AM
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I want to correct one of my previous messages as below with the underlined text:

Quote Quote by tsutsuji View Post
http://www3.nhk.or.jp/news/genpatsu-...440_youso.html The ministry of education and science releases a map of Iodine pollution. Iodine 131 has an 8 day long half life. Of the 2200 measurement points, only 400 provided relevant data. There is a polluted area with the same shape as the Cs-137 pollution area, but there is also an area with relatively high iodine levels in the south of the plant. The Iodine 131/Cesium 137 ratio is higher in the North-West area than in the South area.
http://radioactivity.mext.go.jp/ja/d.../5600_0921.pdf The Iodine map is on page 6 with concentrations as of 14 June. It shows yellow dots in the 20-30 km stay-indoors zone south of the plant (mostly Hirono).

Rice contamination:
Quote Quote by tsutsuji View Post
http://www3.nhk.or.jp/news/html/2011...820321000.html 500 Bq/kg of cesium found in rice tested before harvest in Nihonmatsu, Fukushima prefecture.
Consequences:
Rice with 500 becquerels of cesium per kilogram still can be shipped. Fukushima Prefecture will conduct the official tests of rice for radiation in Nihonmatsu as soon as possible at 300 spots—many more than the initially planned 38 spots
http://online.wsj.com/article/SB1000...000963708.html
Scientific problem:
The level of radioactive materials in soil at the paddy field where the rice was harvested was 3,000 becquerels per kilogram.

"The cesium level [at 500 becquerels per kilogram] of the rice was higher than it was supposed to be, given the radionuclide transfer coefficient. I wonder why such a high level of cesium was detected from this place alone," an official of the prefectural government said.
http://www.yomiuri.co.jp/dy/national/T110924003191.htm
http://www3.nhk.or.jp/news/html/2011...937093000.html Personnel in 3 fishing cooperatives in Soma and Iwaki, Fukushima prefecture, are being trained to use 5 new radiation monitoring instruments able to provide data as soon as the fish is landed. Being able to provide data quickly is important as fish is consumed shortly after being caught. The new tools will be used with trial catches in November at the earliest.

http://new-fukushima.jp/result.php?search_area=いわき市 Three fish species were above the limits in Iwaki : fat greenling (930 Bq/kg of Cs 137), commons skete (520 Bq/kg of Cs 137), slime flounder (620 Bq/kg of Cs 137), all three were caught on 26 September. Another common skete sample had only 160 Bq/kg of Cs 137.

http://new-fukushima.jp/result.php?search_area=相馬市 Samples of some of those species caught on the same day in Soma were below the limit (fat greenling: 90Bq/kg, common skete: 40 Bq/kg for one sample and 100 Bq/kg for another)

http://www.tokyo-np.co.jp/article/ib...602000060.html The fishing of odontobutis obscura (donko) is allowed again in Ibaraki prefecture from 15 September. It had been found above allowed radiation levels and fishing had been stopped in July and August, but recently taken samples are below the limits. Bottom trawling is still avoided north of Kawajiri (Hitachi city), and this is a huge loss as it is a major shrimp fishing area.

Other foods, such as marine produce, won't be as easy to handle, experts say. After the Chernobyl accident, for example, the radioactive contamination of fish peaked between 6 to 12 months after the disaster.
http://search.japantimes.co.jp/cgi-b...0110911a3.html
http://new-fukushima.jp/result.php?s...detail=&page=2 Lactarius (hatsutake) mushrooms found with 11,000 Bq/kg on samples taken on 15 September in Minamisoma.
tsutsuji
#329
Sep30-11, 11:12 AM
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http://www3.nhk.or.jp/news/genpatsu-...kensyutsu.html Plutonium has been found in Iitate Mura, 45 km away from the plant, with 0.82 Bq/m of Pu-238. Adding Pu-239 and Pu-240, the total is 2.5 Bq/m. This is one of the results of a survey performed by the ministry of education and science at 100 locations inside the 80 km range in June and July. It is the first time a government survey finds plutonium outside the plant.

http://www.nikkei.com/news/headline/...E3E2E2E2E2E2E2 Plutonium was found at 6 locations. The highest figure is 4 Bq/m at Namie.

http://radioactivity.mext.go.jp/ja/d.../5600_0930.pdf "Ministry of education and science plutonium and strontium substance analysis results" 30 September 2011
joewein
#330
Sep30-11, 08:10 PM
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Quote Quote by tsutsuji View Post
http://www.nikkei.com/news/headline/...E3E2E2E2E2E2E2 Plutonium was found at 6 locations. The highest figure is 4 Bq/m at Namie.
I wonder what the general background level from Pu from the 1950s/1960s above ground tests is?

From 1955-1966 plutonium deposition (Pu239+Pu240) in Japan from weapon testing by the nuclear powers was above 1 Bq/m2 annually, with a cumulative total of about 40 Bq/m2 during those years alone. Given the long half lives (24110 for Pu239 and 6537 for Pu240), most of that should still be around.
tsutsuji
#331
Oct1-11, 04:48 AM
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Quote Quote by joewein View Post
I wonder what the general background level from Pu from the 1950s/1960s above ground tests is?

From 1955-1966 plutonium deposition (Pu239+Pu240) in Japan from weapon testing by the nuclear powers was above 1 Bq/m2 annually, with a cumulative total of about 40 Bq/m2 during those years alone. Given the long half lives (24110 for Pu239 and 6537 for Pu240), most of that should still be around.
That problem is adressed at paragraph 4.2 of http://radioactivity.mext.go.jp/ja/d.../5600_0930.pdf : the Pu238/(Pu239+Pu240) ratio found in Japan in 1999-2008 is, as shown in Attachment 3 (the last one at the bottom of the pdf) 0.026. The present measurements reveal ratios between 0.33 and 2.2 for five samples. For that reason it is thought that the deposits are new deposits created by the plant. Also in one location only Pu238 is found and Pu239+Pu240 is below detection level. The ratio for that sample, using the detection level for Pu-239-240 (0.5 Bq/m) is also significantly higher than the 1999-2008 ratio. [I think the shape of the Pu238 map, being similar with the shape of the Cesium map is also significant]

It turns out that when the Nikkei says "6 locations" it means "6 locations with a significantly high Pu238/(Pu239+Pu240) ratio. The map shows a lot of locations with a grey triangle, which means that only Pu239+Pu240 was found while Pu238 was not found.

erratum (adding the underlined text):
Quote Quote by tsutsuji View Post

http://www.nikkei.com/news/headline/...E3E2E2E2E2E2E2 The highest figure for Pu238 is 4 Bq/m at Namie.
M. Bachmeier
#332
Oct1-11, 10:03 PM
P: 184
Quote Quote by Shinjukusam View Post
Feel I need to be pointing out the other side of the "it's not science, it's propaganda" discussion.
Try not to be too hard on a man who has been trying to fight against financial influence corrupting scientific surety. He is notable for many truths and many absences of truth discovered. His failings have likely to do more with his age and fear than an honest account of observation.
tsutsuji
#333
Oct2-11, 07:37 AM
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Beef:
In some cases, slaughterhouses in other prefectures are refusing to accept Fukushima cattle because of concerns that the screening process isn't stringent enough.

To dispel those concerns, the Fukushima Prefectural Government is trying to determine how amounts of radioactive matter in blood and meat are related.
http://search.japantimes.co.jp/cgi-b...0111002x3.html
Shinjukusam
#334
Oct2-11, 09:54 AM
P: 35
Quote Quote by M. Bachmeier View Post
Try not to be too hard on a man who has been trying to fight against financial influence corrupting scientific surety. He is notable for many truths and many absences of truth discovered. His failings have likely to do more with his age and fear than an honest account of observation.
Fear should not be an excuse, this is a matter of science. I don't care if he's scared of what could happen, I want to know what is happening.
Astronuc
#335
Oct5-11, 07:17 AM
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For those interested:

International Symposium on Decontamination:
Towards the Recovery of the Environment

The Cabinet Office, Government of Japan, will hold an International Symposium on Decontamination under the co-sponsorship of the Ministry of the Environment. The objective of the symposium is to share experience and best practices in the remediation of land contaminated with radioactive materials, and to contribute to the planning and effective management of decontamination activities in Japan.

Date: 16 October 2011
Time: 10:00 - 18:30 (registration from 9:00-)
Venue: Convention Hall "Paluse Iizaka"
Iizakamachi, Fukushima-city, Fukushima-prefecture, 960-0201 Japan


http://www.oecd-nea.org/press/2011/NEWS-07.html

The symposium is open for the public, and registration must be made by Oct 7.
tsutsuji
#336
Oct5-11, 01:03 PM
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http://www3.nhk.or.jp/news/genpatsu-...30_suiden.html Theories are proposed to explain the 500 Bq/kg rice in Nihonmatsu : the presence of much sand in the soil, which might enhance cesium absorption by the rice, or the presence of 10,000 Bq/kg and higher soil higher in the mountains, with rainwater bringing the radioactive substances down to the rice fields. Further surveys will be performed in the surrounding mountains.
Astronuc
#337
Oct6-11, 07:28 AM
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Clean-up in Fukushima
05 October 2011
http://www.world-nuclear-news.org/RS...a_0510111.html

Most of these were from the 20 kilometre radius of compulsory evacuation, while more people left the next 10 kilometre band where official instructions were to prepare for evacuation should the accident worsen. About another 20,000 in a separate sector extending about 50 kilometres to the northwest were recommended to evacuate because radioactivity deposited there was leading to dose rates of over 20 millisieverts per year.

This compares to a global average background dose rate of 2.4 millisieverts per year from natural sources to which all people are exposed with no apparent ill effects. . . . .
Children who have been exposed will have to be monitored for two or more decades.
Caniche
#338
Oct6-11, 01:54 PM
P: 106
Quote Quote by Astronuc View Post
Clean-up in Fukushima
05 October 2011
http://www.world-nuclear-news.org/RS...a_0510111.html



Children who have been exposed will have to be monitored for two or more decades.

"representing the people and organisations of the global nuclear profession" I guess that mission statement is at least an honest declaration of bias.

As a point of interest ,does anyone know ,if, and if so ,how ,these 'experts' distinguish between "natural" background radiation and background radiation resulting from previous accidents/incidents and bombs and bomb tests.

You have to applaud the stated ambition of the clean up campaign to reduce the levels of radioactive pollution to "half" the 'natural' background level.
tsutsuji
#339
Oct6-11, 05:32 PM
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http://mainichi.jp/select/weathernew...40008000c.html There are limits to how much you can decontaminate with pressure washers. Pr. Yamauchi of Kobe university tells about his findings at a building used for children after-school care in Fukushima city. Inside the building, the floor had 0.33 μSv/h, the beams had 0.52, and just below the roof, it was 0.72 μSv/h, and he understood that the radiation increased with the height. So he checked the roof, outside, and it was 1.79 μSv/h. The roof had been cleaned using a pressure washer, but the radiation could not be reduced more. He is afraid the roof must be changed. He says the goal is to create secure areas where the radiation inside buildings is as low as 0.05 μSv/h as it was before the accident. Pr Kodama of Tokyo university says that in a kindergarten in Minamisoma there were mini hot spots such as the roof (33 μSv/h) and below the toboggan (5~10 μSv/h). After cleaning it once, the roof's radiation was lowered by 50%. It will be difficult to bring it to the 0.5 μSv/h goal, he says. Probably the surface must be removed or the whole roof must be changed. Know-how from house construction companies is needed.

http://www.tepco.co.jp/en/nu/fukushi...11001_02-e.pdf Dealing with higher levels of radiation inside the plant, using dust collectors, Tepco achieves decontamination rates of about 30%, bringing the radiation from 0.48 to 0.33 mSv/h on asphalt.
tsutsuji
#340
Oct7-11, 05:30 AM
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http://www3.nhk.or.jp/news/genpatsu-...20_hibaku.html Until now nuclear worker safety regulations were limited to the jobs indoors or inside nuclear plant premises. So the ministry of labour and health has created a new regulation for the workers who perform decontamination tasks outside the plant, requiring to wear masks, to wear radiation measuring instruments, etc. Some citizen groups had complained that some outdoor workers were not sufficiently protected from radiations.

http://radioactivity.mext.go.jp/ja/1...0_092917_1.pdf Saitama and Chiba helicopter survey results

http://radioactivity.mext.go.jp/ja/1...910_100601.pdf Tokyo and Kanagawa helicopter survey results

http://radioactivity.mext.go.jp/ja/5...000_100601.pdf Aomori helicopter survey plan

http://radioactivity.mext.go.jp/ja/5...000_100602.pdf Toyama helicopter survey plan

http://www3.nhk.or.jp/news/genpatsu-..._hosyasen.html As a result of the Tokyo and Kanagawa helicopter survey, levels higher than 0.2 μSv/h are found in Tokyo in part of the mountainous region of Okutama and at the border with Chiba prefecture in Katsushika ward. For Kanagawa, except some part of the mountainous region, all is below 0.1 μSv/h. According to the ministry of education and science, there are two routes, one in the west and one in the east, and the mountain regions have a higher level than surrounding areas due to the deposits in forests.

Quote Quote by tsutsuji View Post
http://www.yomiuri.co.jp/science/new...OYT1T00890.htm "The [15000 TBq] estimate does not comprise Cs-134, so the total is even greater".
Another estimate of the sea release, was presented by a Japan Meteorological Agency team at a meeting of the Geochemical Society of Japan in Sapporo:
A total of 13,500 terabecquerels of radioactive cesium-137 is slightly more than 10 percent of that of the residual substance left in the northern Pacific after previous nuclear tests, according to the researchers.
http://mdn.mainichi.jp/mdnnews/news/...dm104000c.html
Azby
#341
Oct7-11, 10:51 PM
P: 64
Quote Quote by M. Bachmeier View Post
Try not to be too hard on a man who has been trying to fight against financial influence corrupting scientific surety. He is notable for many truths and many absences of truth discovered. His failings have likely to do more with his age and fear than an honest account of observation.
His failings have to do with a blatantly self-serving agenda. He's now selling radiation measurement sevices in Japan, with prices much higher than those charged by other labs :

http://www.busbylab.com/%E9%A3%9F%E5%93%81%E6%A4%9C%E6%9F%BB/

And is also selling expensive "Busby Laboratories" brand vitamin supplements!! "Devised by the noted radiation risk specialist Dr. Christopher Busby," for "detox against impurities in the body." If he actually said "for detox against radioactive contamination" he could be accused of fraud, so he just leaves it implied.

http://www.4u-detox.com/

I thought it was a joke at first, and that the site had been hacked by a detractor. But it's genuine.

Has anyone seen Soderbergh's latest film, "Contagion"? Busby looks more and more like the blogger character Krumweide every day...
swl
#342
Oct8-11, 02:43 AM
P: 108
Quote Quote by Astronuc View Post
Children who have been exposed will have to be monitored for two or more decades.
I wonder what children are to be "monitored."

Edit: see following post.


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