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Americans' Support for Nuclear Energy Holds at Majority Level 6 Months After Japan Acci... - 0 views

  • WASHINGTON, Oct. 3, 2011 -- /PRNewswire-USNewswire/ -- Six months after the Fukushima Daiichi accident in Japan, solid majorities of Americans still view nuclear energy favorably, still support the extension of operating licenses at existing facilities that meet federal safety standards, and still believe that construction of a new reactor is acceptable at the site of the nearest nuclear power plant that already is operating, a new national survey shows.While support for nuclear energy has declined from the historically high level seen one year ago, support on a variety of measures is holding at the majority levels found consistently in public opinion surveys conducted throughout the past decade.
  • Nuclear energy supplies electricity to 20 percent of U.S. homes and businesses, even though the 104 nuclear facilities operating in 31 states constitute only 10 percent of the nation's electric generating capacity.Eighty-five percent of those surveyed agree that, "When their original operating licenses expire, we should renew the license of nuclear power plants that continue to meet federal safety standards." Seven months ago, 88 percent of Americans agreed with this statement.
  • "While there is some evidence of impact of the Fukushima events, support for nuclear energy continues at much higher levels than in earlier decades," company President Ann Bisconti said. "Turmoil in oil-rich areas of the world and hikes in oil prices historically have focused public opinion even more on nuclear energy, and may have helped to preclude serious impact of events in Japan on public attitudes."Despite the Fukushima accident, 67 percent of Americans rate U.S. nuclear power plant safety high. This is identical to the safety rating found in a national survey last February, one month prior to the earthquake and tsunami that caused the Fukushima accident. Eighty-two percent of Americans believe that "we should learn the lessons from the Japanese accident and continue to develop advanced nuclear energy plants to meet America's growing electricity demand," the new survey showed.
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  • In the new telephone survey of 1,000 U.S. adults, 62 percent of respondents said they favor the use of nuclear energy as one of the ways to provide electricity in the United States, with 35 percent opposed. Those strongly favoring nuclear energy outnumber those strongly opposed by a two-to-one ratio, 28 percent vs. 13 percent, according to the survey conducted Sept. 22-24 by Bisconti Research Inc. with GfK Roper. The survey was sponsored by the Nuclear Energy Institute and has a margin of error of plus or minus three percentage points. Numerous surveys conducted by Bisconti Research over the past decade show that public support for nuclear energy topped 60 percent each year, rising as high as 74 percent of Americans in March 2010.
  • In the latest survey, 59 percent of Americans agree, "We should definitely build more nuclear power plants in the future." Thirty-eight percent disagree. Still, 75 percent of Americans agree that, "Electric utilities should prepare now so that new nuclear power plants could be built if needed in the next decade." Twenty-two percent disagree.Two-thirds of Americans (67 percent) say they would find a new reactor acceptable at the site of the nearest nuclear power plant that already is operating, while 28 percent find this unacceptable. Seven months ago, 76 percent of Americans found this expansion acceptable, with 20 percent saying it was not acceptable.
  • "This survey, like other recent surveys, confirms that large majorities of Americans associate nuclear energy with issues they care about, including clean air, reliable and affordable electricity, energy independence, and economic growth and job creation," Bisconti said.Details on the new survey are accessible at: http://www.nei.org/resourcesandstats/documentlibrary/reliableandaffordableenergy/reports/latest-trends-in-us-public-opinion-about-nuclear-energy-sept-2011.
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Radioactive Materials in Rivers, Wells Detected in Fukushima Much Higher Than Pre-Nuke ... - 0 views

  • The Ministry of Education and Science (and the media reporting the news) is spinning it as "good news" that radioactive materials detected in river water and well water in Fukushima Prefecture are "far less than the provisional safety limit".If you compare the measured level to the provisional safety limit for water which is high as 200 becquerels/liter for radioactive cesium for adults, well yes, it is far less.If you compare the level to the one before the Fukushima I Nuke Plant accident, it is a different story altogether. The highest strontium-90 level in the Ministry's survey is 5.14 times the highest level measured in 2009, and the highest cesium-137 level is 6,500 times the highest level measured in 2009.The Ministry's announcement (10/20/2011) is here (in Japanese, PDF).
  • From Asahi Shinbun (10/20/2011):
  • The Ministry of Education and Science announced the result of the survey of water contamination in rivers and wells in Fukushima Prefecture, except in the 20-kilometer radius from the Fukushima I Nuclear Power Plant. Nuclides such as cesium and strontium were tested, but according to the Ministry there was no detection of radioactive materials exceeding the standard for drinking water.
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  • The Ministry did the survey twice in June and August. It selected the survey locations from the areas that showed relatively high level of cesium deposition in soil in the Ministry's aerial survey after the accident. 50 river locations and 51 wells were selected. Radioactive cesium and iodine-131 were measured in all 101 locations. Strontium and plutonium were measured in 10 river locations where the air radiation was high. Similarly, at 6 wells, only strontium was measured.
  • The highest cesium-137 (half life 30 years) for the river water was detected in Mano District in Minami Soma City (37 kilometers north by northwest from the nuke plant), at 2.0 becquerels/kg. The average amount of cesium-137 in river water was 0.58 becquerels/kg. The highest cesium-137 for the well water was detected in Nukazawa in Motomiya City (54 kilometers west of the plant), at 1.1 becquerels/kg. The average for well water was 0.49 becquerels/kg.
  • According to the Ministry of Education and Science, "Radioactive materials in both river water and well water are far below the provisional safety limit of 200 becquerels/kg". However, according to the Ministry's national survey in 2009, the highest level in river water was found in Akita Prefecture at 0.00037 becquerels/kg (ND in Fukushima). So, 2.0 becquerels/kg of cesium-137 detected this time in Fukushima is 5,400 times as much as the highest level in 2009 in river water. As to 1.1 becquerels/kg of cesium-137 from the well water, it is 6,500 times as much as the highest level detected in tap water in 2009.
  • The largest amount of strontium-90 (half life 30 years) was detected in a river in Onahama in Iwaki City, at 0.018 becquerels/kg, 5.14 times the level detected in the 2009 survey. Strontium-90 in well water was the same level as before the accident. Plutonium and iodine-131 were below the detection limit.
  • According to the Ministry's calculation on the internal radiation if one drinks the river water that had the maximum amount of radioactive materials for one year, cesium-137 would result in 0.025 millisievert, and strontium-90 in 0.00049 millisievert.Hmmm. They tested an alpha emitter (plutonium) and a beta emitter (strontium) in water in locations with high air radiation? What does high air radiation have to do with alpha and beta emitters? And what about other nuclides, like cobalt-60?The Ministry of Education tested water at these locations twice: first in late June to early July, then in early August. Looking at the result, there are two locations where the amount of radioactive cesium significantly INCREASED during the one month, indicating perhaps the inflow of radioactive materials from the surrounding mountains.The Ministry's document has very poor resolution, but here's the page that shows charts of cesium-137 detections (page 19 in the document):
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U.S. Government Confirms Link Between Earthquakes and Hydraulic Fracturing at Oil Price - 0 views

  • On 5 November an earthquake measuring 5.6 rattled Oklahoma and was felt as far away as Illinois. Until two years ago Oklahoma typically had about 50 earthquakes a year, but in 2010, 1,047 quakes shook the state. Why? In Lincoln County, where most of this past weekend's seismic incidents were centered, there are 181 injection wells, according to Matt Skinner, an official from the Oklahoma Corporation Commission, the agency which oversees oil and gas production in the state. Cause and effect? The practice of injecting water into deep rock formations causes earthquakes, both the U.S. Army and the U.S. Geological Survey have concluded.
  • The U.S. natural gas industry pumps a mixture of water and assorted chemicals deep underground to shatter sediment layers containing natural gas, a process called hydraulic fracturing, known more informally as “fracking.” While environmental groups have primarily focused on fracking’s capacity to pollute underground water, a more ominous byproduct emerges from U.S. government studies – that forcing fluids under high pressure deep underground produces increased regional seismic activity. As the U.S. natural gas industry mounts an unprecedented and expensive advertising campaign to convince the public that such practices are environmentally benign, U.S. government agencies have determined otherwise. According to the U.S. Army’s Rocky Mountain Arsenal website, the RMA drilled a deep well for disposing of the site’s liquid waste after the U.S. Environmental Protection Agency “concluded that this procedure is effective and protective of the environment.”  According to the RMA, “The Rocky Mountain Arsenal deep injection well was constructed in 1961, and was drilled to a depth of 12,045 feet” and 165 million gallons of Basin F liquid waste, consisting of “very salty water that includes some metals, chlorides, wastewater and toxic organics” was injected into the well during 1962-1966.
  • Why was the process halted? “The Army discontinued use of the well in February 1966 because of the possibility that the fluid injection was “triggering earthquakes in the area,” according to the RMA. In 1990, the “Earthquake Hazard Associated with Deep Well Injection--A Report to the U.S. Environmental Protection Agency” study of RMA events by Craig Nicholson, and R.I. Wesson stated simply, “Injection had been discontinued at the site in the previous year once the link between the fluid injection and the earlier series of earthquakes was established.” Twenty-five years later, “possibility” and ‘established” changed in the Environmental Protection Agency’s July 2001 87 page study, “Technical Program Overview: Underground Injection Control Regulations EPA 816-r-02-025,” which reported, “In 1967, the U.S. Army Corps of Engineers and the U.S. Geological Survey (USGS) determined that a deep, hazardous waste disposal well at the Rocky Mountain Arsenal was causing significant seismic events in the vicinity of Denver, Colorado.” There is a significant divergence between “possibility,” “established” and “was causing,” and the most recent report was a decade ago. Much hydraulic fracturing to liberate shale oil gas in the Marcellus shale has occurred since.
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  • According to the USGS website, under the undated heading, “Can we cause earthquakes? Is there any way to prevent earthquakes?” the agency notes, “Earthquakes induced by human activity have been documented in a few locations in the United States, Japan, and Canada. The cause was injection of fluids into deep wells for waste disposal and secondary recovery of oil, and the use of reservoirs for water supplies. Most of these earthquakes were minor. The largest and most widely known resulted from fluid injection at the Rocky Mountain Arsenal near Denver, Colorado. In 1967, an earthquake of magnitude 5.5 followed a series of smaller earthquakes. Injection had been discontinued at the site in the previous year once the link between the fluid injection and the earlier series of earthquakes was established.” Note the phrase, “Once the link between the fluid injection and the earlier series of earthquakes was established.” So both the U.S Army and the U.S. Geological Survey over fifty years of research confirm on a federal level that that “fluid injection” introduces subterranean instability and is a contributory factor in inducing increased seismic activity.” How about “causing significant seismic events?”
  • Fast forward to the present. Overseas, last month Britain’s Cuadrilla Resources announced that it has discovered huge underground deposits of natural gas in Lancashire, up to 200 trillion cubic feet of gas in all. On 2 November a report commissioned by Cuadrilla Resources acknowledged that hydraulic fracturing was responsible for two tremors which hit Lancashire and possibly as many as fifty separate earth tremors overall. The British Geological Survey also linked smaller quakes in the Blackpool area to fracking. BGS Dr. Brian Baptie said, “It seems quite likely that they are related,” noting, “We had a couple of instruments close to the site and they show that both events occurred near the site and at a shallow depth.” But, back to Oklahoma. Austin Holland’s August 2011 report, “Examination of Possibly Induced Seismicity from Hydraulic Fracturing in the Eola Field, Garvin County, Oklahoma” Oklahoma Geological Survey OF1-2011, studied 43 earthquakes that occurred on 18 January, ranging in intensity from 1.0 to 2.8 Md (milliDarcies.) While the report’s conclusions are understandably cautious, it does state, “Our analysis showed that shortly after hydraulic fracturing began small earthquakes started occurring, and more than 50 were identified, of which 43 were large enough to be located.”
  • Sensitized to the issue, the oil and natural gas industry has been quick to dismiss the charges and deluge the public with a plethora of televisions advertisements about how natural gas from shale deposits is not only America’s future, but provides jobs and energy companies are responsible custodians of the environment. It seems likely that Washington will eventually be forced to address the issue, as the U.S. Army and the USGS have noted a causal link between the forced injection of liquids underground and increased seismic activity. While the Oklahoma quake caused a deal of property damage, had lives been lost, the policy would most certainly have come under increased scrutiny from the legal community. While polluting a local community’s water supply is a local tragedy barely heard inside the Beltway, an earthquake ranging from Oklahoma to Illinois, Kansas, Arkansas, Tennessee and Texas is an issue that might yet shake voters out of their torpor, and national elections are slightly less than a year away.
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Radiation at Thyroid Gland Found in 45% of 1,000 Children Tested in Fukushima [05Jul11] - 0 views

  • The Nuclear Safety Commission headed by Haruki "Detarame" Madarame disclosed on July 4 that the test conducted in late March had found 45% of 1,080 children tested in Fukushima Prefecture had internal radiation exposure at thyroid gland, according to Tokyo Shinbun. 3 months, that seems to be the amount of time that these government people must feel safe to disclose what they had known all along. After 3 months, people may forget, and/or people will give up because the disclosure is too late.
  • The NSC says the levels were low, and there was no need for more detailed evaluation. If you look at the numbers, though, you may wonder how they came to the conclusion. To them, 100 millisieverts per year body dose equivalent for 1 year old (or 0.2 microsievert/hour) was acceptable because the ICRP says so. Since the highest they found was 50 millisieverts per year body dose equivalent, they concluded there was no need for further testing.
  • Japan's Nuclear Safety Commission disclosed on July 4 that the survey done in late March on 1,000 children living near Fukushima I Nuclear Power Plant had revealed that 45% of the children were exposed to radiation at the thyroid gland. Commissioner Shigeharu Kato says "The radiation level was not the level that would require more detailed examination."
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  • The survey was conducted by the national government and the Fukushima prefectural government from March 26 to 30 in Iwaki City, Kawamata-machi, and Iitate-mura, where the authorities expected the high probability of internal radiation exposure at the thyroid gland. 1,080 children aged zero to 15 were tested, and 45% had the internal radiation exposure.
  • According to the NSC, the highest dose was 0.1 microsievert/hour (body dose equivalent of 50 millisieverts per year at thyroid gland for 1 year old). For 99% of the children tested, the dose was 0.04 microsievert/hour or less, which is the dose equivalent of 20 millisieverts per year at thyroid gland for 1 year old. However, Commissioner Kato said in the press conference on July 4, "To consider body dose equivalent, the survey was too coarse. There was no child who need further detailed examination."
  • According to the ICRP recommendation, 100 millisieverts per year will increase the risk of cancer by 0.5%, and that amount is set as the maximum annual exposure limit in a nuclear emergency. In the survey this time, the standard was set at 100 millisieverts, and the detailed examination was to be done if 0.2 microsievert/hour dose was found, which would be the dose equivalent of 100 millisieverts per year at thyroid gland for 1 year old.
  • The Japanese government submitted the report to the IAEA which mentioned the survey done on 1,080 children for radiation at the thyroid gland, but the government did not disclose what percentage of the children were actually affected.
  • So the Japanese government was secretly testing the children in Iitate-mura, as it scoffed at the suggestion by IAEA that the radiation level in the village was very high and evacuation should be considered. All back in late March when it could have made a difference. According to Tokyo Brown Tabby who read the Japanese post and called up the NSC, the NSC says the data was uploaded in May to the NSC website. So far I haven't managed to locate it. The NSC also says they informed the parents. I hope so.
  • From Tokyo Shinbun (7/5/2011
  • From Tokyo Shinbun (7/5/2011
  • From Tokyo Shinbun
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Nuclear energy foundation criticized for suspending public opinion polls - Koea [18Oct11] - 0 views

  • The Korea Nuclear Energy Foundation (KNEF), whose major role is national promotion and advertisement of nuclear power, has been receiving harsh criticism for not having conducted any public opinion polls this year in contrast to the 12 polls last year. Observers say it is clear that the organization is conveying public opinion only when the public atmosphere is in favor of nuclear power, but dodging public opinion that is critical of nuclear energy. The KNEF said Tuesday, “We could not conduct public-opinion polls this year since expenditures on hosting symposiums and issuing informational brochures in response to the Fukushima accident exceeded the budget. We plan to conduct surveys next year instead.”
  • However, observers say that KNEF is avoiding public surveys for fear of publicizing the negative image for nuclear power that Fukushima accident in March 2011 has triggered. In fact, according to a public opinion poll conducted by Busan chapter of the Korea Federation for Environmental Movement (KFEM), only 7.4% of 1,000 respondents supported the government’s plan to spur the development of nuclear power while 60.9% did not.  Even when reflecting on the steps that KNEF has taken in the past, their explanations have failed to sway observers. Last year, when the finalized contract for exporting nuclear power plant to United Arab Emirates (UAE) boosted the public support for nuclear power, KNEF actively conducted 12 public opinion polls from February to December. They spent 45 million won ($39,379) on one survey throuth one-on-one interviews and 8 million won on each 11 phone surveys. It is drastically different from their old practice of conducting surveys only once a quarter. Based on the results of the numerous public opinion polls conducted last year, KNEF advertised that the majority (88%) of the citizens support nuclear power.
  • Lee Hun-seok, head of Energy Justice Actions, said, “It appears that they have failed to conduct any public opinion polls for fear of publicizing the anti-nuclear atmosphere. They only provide polls and information in favor of nuclear power. How can anyone trust such biased information?”
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Cesium from Fukushima plant fell all over Japan [26Nov11] - 0 views

  • Radioactive substances from the crippled Fukushima No. 1 nuclear power plant have now been confirmed in all prefectures, including Uruma, Okinawa Prefecture, about 1,700 kilometers from the plant, according to the science ministry. The ministry said it concluded the radioactive substances came from the stricken nuclear plant because, in all cases, they contained cesium-134, which has short half-life of two years. Before the March 11 Great East Japan Earthquake, radioactive substance were barely detectable in most areas.
  • the Ministry of Education, Culture, Sports, Science and Technology's survey results released on Nov. 25 showed that fallout from the Fukushima plant has spread across Japan. The survey covered the cumulative densities of radioactive substances in dust that fell into receptacles during the four months from March through June. Figures were not available for Miyagi and Fukushima prefectures, where the measurement equipment was rendered inoperable by the March 11 disaster. One measurement station was used for each of the other 45 prefectures. The highest combined cumulative density of radioactive cesium-134 and cesium-137 was found in Hitachinaka, Ibaraki Prefecture, at 40,801 becquerels per square meter. That was followed by 22,570 becquerels per square meter in Yamagata, the capital of Yamagata Prefecture, and 17,354 becquerels per square meter in Tokyo's Shinjuku Ward.
  • The current air radiation level in Ibaraki Prefecture is about 0.14 microsievert per hour, equivalent to an annual dose of about 1 millisievert, the safety limit for exposure under normal time international standards. Large amounts of radioactive dust fell in Tokyo, but a separate survey has detected relatively low accumulations of cesium in the soil. "Tokyo has smaller soil surfaces than other prefectures, but road and concrete surfaces are less prone to fixate cesium deposits, which were probably diffused by the wind and rain," a ministry official explained.
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  • The fallout densities were considerably lower in the Chugoku and Kyushu regions in western Japan. The smallest figure of 0.378 becquerel per square meter came from Uto, Kumamoto Prefecture. The density in Osaka was 18.9 becquerels per square meter. The peak value in Ibaraki Prefecture was 970,000 times larger than the cumulative fallout density of 0.042 becquerel per square meter in fiscal 2009, found in an earlier nationwide survey before the Fukushima crisis started.
  • Also on Nov. 25, the science ministry released maps of aerially measured radioactive cesium from the Fukushima plant that accumulated in Aomori, Ishikawa, Fukui and Aichi prefectures. This was the final batch of the 22 prefectures in eastern Japan where mapping was to be completed by the end of this year. Nowhere in the four prefectures did the accumulations exceed 10,000 becquerels per square meter, the threshold for defining an area as being affected by the nuclear accident. This reconfirmed the science ministry's view that radioactive plumes wafted only as far west as the border of Gunma and Nagano prefectures and as far north as the border of Miyagi and Iwate prefectures, ministry officials said.
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#Radiation in Japan: Government to Survey Half of Japan for Soil Contamination [26Jul11] - 0 views

  • The Ministry of Education and Science announced that it will conduct the aerial survey of 23 prefectures (out of total 47) to determine the level of soil contamination. For some reason, Hokkaido is excluded, but every prefecture from Aomori to Shiga, which is located about in the middle of the Honshu Island will be surveyed. It's all of Tohoku, Kanto, Chubu-Hokuriku.(In the map, Hokuriku is bundled with Chubu; Hokuriku includes prefectures facing the Japan Sea. For more details within the regions, go to the web-japan.org page.)If I were the official at the Ministry, I would test Hokkaido, too. I have seen too many radioactive plumes sweeping the island of Hokkaido in the simulation animations by several European meteorological institutions. (For the latest from the German Weather Bureau, go here. But even they will stop publishing the dispersion map on July 29... )
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Soil Contamination in 34 Locations in Fukushima Exceeds Chernobyl Confiscation/Closed Z... - 0 views

  • In one location, the contamination level is more than 10 times the Chernobyl level. What a surprise. Now that PM Kan is out, the government dribbles out the information that it withheld as it de-emphasized and even attacked the reports of high soil contamination as measured by private entities including citizens' groups.
  • The most contaminated location found so far is Okuma-machi, where Fukushima I Nuke Plant is located: 29,460,000 becquerels per square meter with cesium-134 and cesium-137 combined, 15,450,000 becquerels per square meter if only cesium-137 is counted.
  • The confiscated/closed zone after the Chernobyl accident is set in locations whose cesium-137 level in soil exceeds 1,480,000 becquerels per square meter. The level of cesium-137 in the location in Okuma-machi is 10 times that of the Chernobyl confiscated/closed zone. From Yomiuri Shinbun (3:05AM JST 8/30/2011):
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  • The soil contamination as the result of the Fukushima I Nuclear Power Plant accident was reported on the August 29 meeting at the Ministry of Education and Science.
  • The survey found 34 locations in 6 municipalities exceeding the level of the confiscation/closed zone of the Chernobyl accident (1,480,000 becquerels/square meter of cesium-137 in soil). The purpose of the survey was to understand the radiation exposure of the residents. Prime Minister Kan said on August 27 that there might be locations where the residents wouldn't be able to return for a long time. The survey data validates the prime minister's comment.
  • According to the survey, the highest cesium-137 concentration in soil as of June 14 was in Okuma-machi in Fukushima Prefecture, within the no-entry evacuation zone, at 15,450,000 becquerels/square meter. If combined with cesium-134, the radioactive cesium concentration was 29,460,000 becquerels/square meter.
  • Total 16 location in 4 municipalities (Okuma-machi, Futaba-machi, Namie-machi, Tomioka-machi) exceeded 3,000,000 becquerels/square meter in cesium-137 concentration. The area with the high cesium-137 concentration extends northwest from the nuclear power plant. In total, 6 municipalities including Iitate-mura and Minami Soma City had the locations that exceeded the Chernobyl confiscation/closed zone level of cesium-137. The Ministry measured the soil samples from about 2,200 locations.Here's the map by Asahi Shinbun, including the locations with cesium-137 concentration of less than 1 million becquerels/square meter.
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Professor Yukio Hayakawa Takes a Walk in Fukushima City,measure radioactivity [16Mar12] - 0 views

  • Professor Yukio Hayakawa Takes a Walk in Fukushima City, 3/16/2012 armed with 4 different radiation survey meters. One of the reasons he went to Fukushima was apparently to test the survey meters and compare the readings. The entire walk took 7 hours yesterday, says Hayakawa in his tweet, nothing compared to mountain climbing. (He's a volcanologist.)
  • 4.164 microsieverts/hour on the "black dust" - roadside sediment of soil and organic materials. (It is not just in Minami Soma City, where the highest radioactive cesium density in the "black dust" so far is 3.43 million becquerels/kg.)
  • Over 10 microsieverts/hour (all his survey meters went overscale) at the rain gutter.2.3 microsieverts/hour on the lawn in front of the City Hall, 1.5 microsievert/hour 1 meter off the lawn.For detailed locations and measurements, see his blog post (in Japanese).
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Cesium up to 100 times levels before disaster found in plankton far off nuke plant [03... - 0 views

  • Radioactive cesium up to 100 times pre-nuclear disaster levels has been detected in plankton inhabiting the sea far from the crippled nuclear plant following the March 2011 disaster, according to a survey conducted by Japanese and U.S. researchers. The high concentration of cesium, which is believed to derive from the Fukushima No. 1 Nuclear Power Plant, suggests that radioactive substances that have leaked from the complex are spreading extensively in the sea.
  • "Even though radiation levels detected from the plankton samples were still low, there is a possibility that large amounts of cesium will accumulate in fish through the food chain in a phenomenon called biological concentration. We need to continue our survey," he said. "Each species of marine creatures that feed on animal plankton need to be monitored over the long term."
  • The results of the survey were published in the Proceedings of the National Academy of Sciences of the United States on April 3.
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NYTimes: Radioactivity after atomic bomb only 1000th of that from luminous dial watch -... - 0 views

  • Science with a Skew: The Nuclear Power Industry After Chernobyl and Fukushima
  • [...] The Japanese physicians and scientists who’d been on the scene told horrific stories of people who’d seemed unharmed, but then began bleeding from ears, nose, and throat, hair falling out by the handful, bluish spots appearing on the skin, muscles contracting, leaving limbs and hands deformed. When they tried to publish their observations, they were ordered to hand over their reports to US authorities. Throughout the occupation years (1945-52) Japanese medical journals were heavily censored on nuclear matters. In late 1945, US Army surgeons issued a statement that all people expected to die from the radiation effects of the bomb had already died and no further physiological effects due to radiation were expected. When Tokyo radio announced that even people who entered the cities after the bombings were dying of mysterious causes and decried the weapons as “illegal” and “inhumane,” American officials dismissed these allegations as Japanese propaganda.
  • The issue of radiation poisoning was particularly sensitive, since it carried a taint of banned weaponry, like poison gas. The A-bomb was not “an inhumane weapon,” declared General Leslie Groves, who had headed the Manhattan project. The first western scientists allowed in to the devastated cities were under military escort, ordered in by Groves. The first western journalists allowed in were similarly under military escort. Australian journalist Wilfred Burchett, who managed to get in to Hiroshima on his own, got a story out to a British paper, describing people who were dying “mysteriously and horribly” from “an unknown something which I can only describe as the atomic plague… dying at the rate of 100 a day,” General MacArthur ordered him out of Japan; his camera, with film shot in Hiroshima, mysteriously disappeared.
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  • No Radioactivity in Hiroshima Ruin,” proclaimed a New York Times headline, Sept 13, 1945. “Survey Rules out Nagasaki Dangers,” stated another headline: “Radioactivity after atomic bomb is only 1000th of that from luminous dial watch,” Oct 7, 1945. [...]
  • Read the article here
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#Radiation in Japan: 60,000 Bq/kg Cesium in Riverbed Soil in Fukushima [16Nov11] - 0 views

  • On November 15, the Ministry of the Environment announced the result of the survey of the radioactive material density in bottom soil in 193 locations in rivers, lakes and dams in Fukushima Prefecture. Radioactive cesium was detected in almost all locations, with the highest density of 60,000 becquerels/kg of radioactive cesium in the riverbed soil in the Ota River that runs through Minami Soma City, which was designated as "evacuation-ready zone" after the Fukushima I Nuclear Power Plant accident.
  • The Ministry also conducted the survey of the water. Maximum 27 becquerels/liter of radioactive cesium was detected in the water from a dam inside the "no-entry zone" [within 20-kilometer radius], but in most locations it was not detected. The Ministry's analysis is that "radioactive materials have been absorbed by sludge and sands and sunk to the bottom, and that is why the radiation density is high [in the soil in rivers, lakes and dams]."The survey result is not yet uploaded at the Ministry's website.The provisional "safety" standard for drinking water in Japan is 200 becquerels/liter of radioactive cesium. (For reference, in Belarus, it is 10 becquerels/kg.)
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#Fukushima I Nuke Plant Reactor 1 Balloon Survey of 5th Floor Was Unsuccessful |[08Aug12] - 0 views

  • According to TEPCO's press release on 8/8/2012, the balloon couldn't pop out onto the operating floor (5th floor) because it was stopped by a cable on the 4th floor. The balloon did take photographs of the 4th floor. The purpose of the survey (not fulfilled by this project) was to see what the 5th floor was like, in order to prepare for the future removal of fuel assemblies from the Spent Fuel Pool. (See my post from July 23, 2012.)
  • 5 TEPCO employees and 14 affiliate company workers did the work, for about 35 minutes, receiving maximum 1.54 millisievert for the shortened work.
  • Purpose The investigation was conducted to understand the current condition of Unit 1 operating floor (5th floor) and provide inputs to the consideration of fuel removal from the spent fuel pool.
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Fukushima radiation alarms doctors [18Aug11] - 0 views

  • Scientists and doctors are calling for a new national policy in Japan that mandates the testing of food, soil, water, and the air for radioactivity still being emitted from Fukushima's heavily damaged Daiichi nuclear power plant."How much radioactive materials have been released from the plant?" asked Dr Tatsuhiko Kodama, a professor at the Research Centre for Advanced Science and Technology and Director of the University of Tokyo's Radioisotope Centre, in a July 27 speech to the Committee of Health, Labour and Welfare at Japan's House of Representatives. "The government and TEPCO have not reported the total amount of the released radioactivity yet," said Kodama, who believes things are far worse than even the recent detection of extremely high radiation levels at the plant. There is widespread concern in Japan about a general lack of government monitoring for radiation, which has caused people to begin their own independent monitoring, which are also finding disturbingly high levels of radiation. Kodama's centre, using 27 facilities to measure radiation across the country, has been closely monitoring the situation at Fukushima - and their findings are alarming.According to Dr Kodama, the total amount of radiation released over a period of more than five months from the ongoing Fukushima nuclear disaster is the equivalent to more than 29 "Hiroshima-type atomic bombs" and the amount of uranium released "is equivalent to 20" Hiroshima bombs.
  • Kodama, along with other scientists, is concerned about the ongoing crisis resulting from the Fukushima situation, as well as what he believes to be inadequate government reaction, and believes the government needs to begin a large-scale response in order to begin decontaminating affected areas.Distrust of the Japanese government's response to the nuclear disaster is now common among people living in the effected prefectures, and people are concerned about their health.Recent readings taken at the plant are alarming.When on August 2nd readings of 10,000 millisieverts (10 sieverts) of radioactivity per hour were detected at the plant, Japan's science ministry said that level of dose is fatal to humans, and is enough radiation to kill a person within one to two weeks after the exposure. 10,000 millisieverts (mSv) is the equivalent of approximately 100,000 chest x-rays.
  • t is an amount 250 per cent higher than levels recorded at the plant in March after it was heavily damaged by the earthquake and ensuing tsunami. The operator of Japan's crippled Fukushima Daiichi nuclear power plant, Tokyo Electric Power Company (TEPCO), that took the reading, used equipment to measure radiation from a distance, and was unable to ascertain the exact level because the device's maximum reading is only 10,000 mSv. TEPCO also detected 1,000 millisieverts (mSv) per hour in debris outside the plant, as well as finding 4,000 mSv per hour inside one of the reactor buildings.
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  • he Fukushima disaster has been rated as a "level seven" on the International Nuclear and Radiological Event Scale (INES). This level, the highest, is the same as the Chernobyl nuclear disaster in 1986, and is defined by the scale as: "[A] major release of radioactive material with widespread health and environmental effects requiring implementation of planned and extended countermeasures."The Fukushima and Chernobyl disasters are the only nuclear accidents to have been rated level seven on the scale, which is intended to be logarithmic, similar to the scale used to describe the comparative magnitude of earthquakes. Each increasing level represents an accident approximately ten times more severe than the previous level.
  • Doctors in Japan are already treating patients suffering health effects they attribute to radiation from the ongoing nuclear disaster."We have begun to see increased nosebleeds, stubborn cases of diarrhoea, and flu-like symptoms in children," Dr Yuko Yanagisawa, a physician at Funabashi Futawa Hospital in Chiba Prefecture, told Al Jazeera.
  • r Helen Caldicott, the founding president of Physicians for Social Responsibility, a group that was awarded the Nobel Peace Prize in 1985, is equally concerned about the health effects from Japan's nuclear disaster."Radioactive elements get into the testicles and ovaries, and these cause genetic disease like diabetes, cystic fibrosis, and mental retardation," she told Al Jazeera. "There are 2,600 of these diseases that get into our genes and are passed from generation to generation, forever."
  • Al Jazeera's Aela Callan, reporting from Japan's Ibaraki prefecture, said of the recently detected high radiation readings: "It is now looking more likely that this area has been this radioactive since the earthquake and tsunami, but no one realised until now."Workers at Fukushima are only allowed to be exposed to 250 mSv of ionising radiation per year.
  • radioactive cesium exceeding the government limit was detected in processed tea made in Tochigi City, about 160km from the troubled Fukushima Daiichi nuclear plant, according to the Tochigi Prefectural Government, who said radioactive cesium was detected in tea processed from leaves harvested in the city in early July. The level is more than 3 times the provisional government limit.
  • anagisawa's hospital is located approximately 200km from Fukushima, so the health problems she is seeing that she attributes to radiation exposure causes her to be concerned by what she believes to be a grossly inadequate response from the government.From her perspective, the only thing the government has done is to, on April 25, raise the acceptable radiation exposure limit for children from 1 mSv/year to 20 mSv/year.
  • This has caused controversy, from the medical point of view," Yanagisawa told Al Jazeera. "This is certainly an issue that involves both personal internal exposures as well as low-dose exposures."Junichi Sato, Greenpeace Japan Executive Director, said: "It is utterly outrageous to raise the exposure levels for children to twenty times the maximum limit for adults."
  • The Japanese government cannot simply increase safety limits for the sake of political convenience or to give the impression of normality."Authoritative current estimates of the health effects of low-dose ionizing radiation are published in the Biological Effects of Ionising Radiation VII (BEIR VII) report from the US National Academy of Sciences.
  • he report reflects the substantial weight of scientific evidence proving there is no exposure to ionizing radiation that is risk-free. The BEIR VII estimates that each 1 mSv of radiation is associated with an increased risk of all forms of cancer other than leukemia of about 1-in-10,000; an increased risk of leukemia of about 1-in-100,000; and a 1-in-17,500 increased risk of cancer death.
  • She attributes the symptoms to radiation exposure, and added: "We are encountering new situations we cannot explain with the body of knowledge we have relied upon up until now.""The situation at the Daiichi Nuclear facility in Fukushima has not yet been fully stabilised, and we can't yet see an end in sight," Yanagisawa said. "Because the nuclear material has not yet been encapsulated, radiation continues to stream into the environment."
  • So far, the only cases of acute radiation exposure have involved TEPCO workers at the stricken plant. Lower doses of radiation, particularly for children, are what many in the medical community are most concerned about, according to Dr Yanagisawa.
  • Humans are not yet capable of accurately measuring the low dose exposure or internal exposure," she explained, "Arguing 'it is safe because it is not yet scientifically proven [to be unsafe]' would be wrong. That fact is that we are not yet collecting enough information to prove the situations scientifically. If that is the case, we can never say it is safe just by increasing the annual 1mSv level twenty fold."
  • Her concern is that the new exposure standards by the Japanese government do not take into account differences between adults and children, since children's sensitivity to radiation exposure is several times higher than that of adults.
  • Al Jazeera contacted Prime Minister Naoto Kan's office for comment on the situation. Speaking on behalf of the Deputy Cabinet Secretary for Public Relations for the Prime Minister's office, Noriyuki Shikata said that the Japanese government "refers to the ICRP [International Commission on Radiological Protection] recommendation in 2007, which says the reference levels of radiological protection in emergency exposure situations is 20-100 mSv per year. The Government of Japan has set planned evacuation zones and specific spots recommended for evacuation where the radiation levels reach 20 mSv/year, in order to avoid excessive radiation exposure."
  • he prime minister's office explained that approximately 23bn yen ($300mn) is planned for decontamination efforts, and the government plans to have a decontamination policy "by around the end of August", with a secondary budget of about 97bn yen ($1.26bn) for health management and monitoring operations in the affected areas. When questioned about the issue of "acute radiation exposure", Shikata pointed to the Japanese government having received a report from TEPCO about six of their workers having been exposed to more than 250 mSv, but did not mention any reports of civilian exposures.
  • Prime Minister Kan's office told Al Jazeera that, for their ongoing response to the Fukushima crisis, "the government of Japan has conducted all the possible countermeasures such as introduction of automatic dose management by ID codes for all workers and 24 hour allocation of doctors. The government of Japan will continue to tackle the issue of further improving the health management including medium and long term measures". Shikata did not comment about Kodama's findings.
  • Nishio Masamichi, director of Japan's Hakkaido Cancer Centre and a radiation treatment specialist, published an article on July 27 titled: "The Problem of Radiation Exposure Countermeasures for the Fukushima Nuclear Accident: Concerns for the Present Situation". In the report, Masamichi said that such a dramatic increase in permitted radiation exposure was akin to "taking the lives of the people lightly". He believes that 20mSv is too high, especially for children who are far more susceptible to radiation.
  • Kodama is an expert in internal exposure to radiation, and is concerned that the government has not implemented a strong response geared towards measuring radioactivity in food. "Although three months have passed since the accident already, why have even such simple things have not been done yet?" he said. "I get very angry and fly into a rage."
  • Radiation has a high risk to embryos in pregnant women, juveniles, and highly proliferative cells of people of growing ages. Even for adults, highly proliferative cells, such as hairs, blood, and intestinal epithelium cells, are sensitive to radiation."
  • Early on in the disaster, Dr Makoto Kondo of the department of radiology of Keio University's School of Medicine warned of "a large difference in radiation effects on adults compared to children".Kondo explained the chances of children developing cancer from radiation exposure was many times higher than adults.
  • Children's bodies are underdeveloped and easily affected by radiation, which could cause cancer or slow body development. It can also affect their brain development," he said.Yanagisawa assumes that the Japanese government's evacuation standards, as well as their raising the permissible exposure limit to 20mSv "can cause hazards to children's health," and therefore "children are at a greater risk".
  • Kodama, who is also a doctor of internal medicine, has been working on decontamination of radioactive materials at radiation facilities in hospitals of the University of Tokyo for the past several decades. "We had rain in Tokyo on March 21 and radiation increased to .2 micosieverts/hour and, since then, the level has been continuously high," said Kodama, who added that his reporting of radiation findings to the government has not been met an adequate reaction. "At that time, the chief cabinet secretary, Mr Edano, told the Japanese people that there would be no immediate harm to their health."
  • n early July, officials with the Japanese Nuclear Safety Commission announced that approximately 45 per cent of children in the Fukushima region had experienced thyroid exposure to radiation, according to a survey carried out in late March. The commission has not carried out any surveys since then.
  • Now the Japanese government is underestimating the effects of low dosage and/or internal exposures and not raising the evacuation level even to the same level adopted in Chernobyl," Yanagisawa said. "People's lives are at stake, especially the lives of children, and it is obvious that the government is not placing top priority on the people's lives in their measures."Caldicott feels the lack of a stronger response to safeguard the health of people in areas where radiation is found is "reprehensible".
  • Millions of people need to be evacuated from those high radiation zones, especially the children."
  • Dr Yanagisawa is concerned about what she calls "late onset disorders" from radiation exposure resulting from the Fukushima disaster, as well as increasing cases of infertility and miscarriages."Incidence of cancer will undoubtedly increase," she said. "In the case of children, thyroid cancer and leukemia can start to appear after several years. In the case of adults, the incidence of various types of cancer will increase over the course of several decades."Yanagisawa said it is "without doubt" that cancer rates among the Fukushima nuclear workers will increase, as will cases of lethargy, atherosclerosis, and other chronic diseases among the general population in the effected areas.
  • Radioactive food and water
  • An August 1 press release from Japan's MHLW said no radioactive materials have been detected in the tap water of Fukushima prefecture, according to a survey conducted by the Japanese government's Nuclear Emergency Response Headquarters. The government defines no detection as "no results exceeding the 'Index values for infants (radioactive iodine)'," and says "in case the level of radioactive iodine in tap water exceeds 100 Bq/kg, to refrain from giving infants formula milk dissolved by tap water, having them intake tap water … "
  • Yet, on June 27, results were published from a study that found 15 residents of Fukushima prefecture had tested positive for radiation in their urine. Dr Nanao Kamada, professor emeritus of radiation biology at Hiroshima University, has been to Fukushima prefecture twice in order to take internal radiation exposure readings and facilitated the study.
  • The risk of internal radiation is more dangerous than external radiation," Dr Kamada told Al Jazeera. "And internal radiation exposure does exist for Fukushima residents."According to the MHLW, distribution of several food products in Fukushima Prefecture remain restricted. This includes raw milk, vegetables including spinach, kakina, and all other leafy vegetables, including cabbage, shiitake mushrooms, bamboo shoots, and beef.
  • he distribution of tealeaves remains restricted in several prefectures, including all of Ibaraki, and parts of Tochigi, Gunma, Chiba, Kanagawa Prefectures.Iwate prefecture suspended all beef exports because of caesium contamination on August 1, making it the fourth prefecture to do so.
  • yunichi Tokuyama, an expert with the Iwate Prefecture Agricultural and Fisheries Department, told Al Jazeera he did not know how to deal with the crisis. He was surprised because he did not expect radioactive hot spots in his prefecture, 300km from the Fukushima nuclear plant."The biggest cause of this contamination is the rice straw being fed to the cows, which was highly radioactive," Tokuyama told Al Jazeera.
  • Kamada feels the Japanese government is acting too slowly in response to the Fukushima disaster, and that the government needs to check radiation exposure levels "in each town and village" in Fukushima prefecture."They have to make a general map of radiation doses," he said. "Then they have to be concerned about human health levels, and radiation exposures to humans. They have to make the exposure dose map of Fukushima prefecture. Fukushima is not enough. Probably there are hot spots outside of Fukushima. So they also need to check ground exposure levels."
  • Radiation that continues to be released has global consequences.More than 11,000 tonnes of radioactive water has been released into the ocean from the stricken plant.
  • Those radioactive elements bio-concentrate in the algae, then the crustaceans eat that, which are eaten by small then big fish," Caldicott said. "That's why big fish have high concentrations of radioactivity and humans are at the top of the food chain, so we get the most radiation, ultimately."
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How late are we? | Fukushima Diary [28Sep11] - 0 views

  • Unusual form of plants are being found every where in Japan. Today,a Japanese traditional root vegetable “Myoga” was found ,which was four times bigger than usual size. The farmer said ,he has never seen such big Myoga. He has been farming there since his grand parents’ generation. http://www.yomiuri.co.jp/national/news/20110928-OYT1T00324.htm Should we stay here ? The answer is no. and the right question is When should we have evacuated ? Today’s news.
  • From a survey conducted by the local hospital association, it became clear that 12% of the full time medical doctors who worked at the hospitals in Fukushima Prefecture have retired voluntarily. That means 125 doctors less in Fukushima Prefecture’s hospitals. The number of nurses who retired also rose, 407 of them - which means 5% (form 42 hospitals) - it is believed to have retired because they had to evacuate. As a consequence, a part of the clinical departments and the night emergency medical service in the prefecture’s hospitals are inactive. The survey was made by the end of July to check the conditions in which the doctors work in the prefecture. It was conducted in 127 hospitals - from the total of 139 hospitals -,which are members of the same association. The survey was answered by only 54 hospitals.
  • The main municipalities in which a high percentage of doctors’ retiring was recorded even before the nuclear accident were: Minamisoma-shi 46% (13 doctors, including one doctor from o hospital located in a danger zone ), Iwaki-shi 5 hospitals, 23% of the doctors (31doctors ), Fukushima city 6 hospitals 9% (41 ) doctors , Kooriyama-shi 4 hospitals 8% (25 ) doctors.
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  • As for the nurses, their number decreased by 16%: (44 nurses, including two from one hospital located in the danger zone) in Minamisoma city, by 8% (113) in 7 hospitals in Iwaki city, in 9 hospitals from Fukushima cityi and 6 hospitals of Kooriyama-shi by 4% , which means 68 and 54 nurses respectivly.
  • http://www.yomiuri.co.jp/national/news/20110928-OYT1T00658.htm?from=tw
  • At least 12% of the doctors “quit” and left Fukushima by the end of July. It’s very rare for a doctor to “quit” in Japan. They “knew” the accurate health risk because of radiation. Another news of today.
  • Mr.Koide was stopped to publish a data on 3/18. It is the data to show how much radiation flew to Tokyo. The data was taken in Tokyo ,on 3/15. It reads, I-131 720Bq/m3 I-132 450 Bq/m3 I-133 20 Bq/m3 Te-132 570 Bq/m3 Cs-134 110 Bq/m3 Cs-136 21 Bq/m3 Cs-137 130 Bq/m3 Effective dose = 210uSv/d The safety limit of effective dose per day is 55 uSv. It was about four times as the safety limit.
  • We should have evacuated from Tokyo before 3/15. Here are the tweets of an actual worker of Fukushima,
  • Happy20790
  • We done measuring hydrogen amount in reactor 1. It seems to be an abnormal test, specialists came to the plant. The result was 60% = hydrogen. The rest is full of other kinds of flammable gas.
  • It may explode only if it touches air. It can’t be released or replaced by nitrogen, so we can only inject nitrogen from isolation valves. hope it doesn’t let air come into the pipe..
  • Since 311,we have done variety of the works but this is the most tricky mission.
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#Radiation in Japan: 300,000 Bq/Kg of Radioactive Cesium from Soil in Fukushima City [0... - 0 views

  • NGO "FoE Japan (Friends of Earth Japan) did its own survey of radiation contamination in Watari District in Fukushima City with the help from Professor Tomoya Yamauchi of Kobe University. Watari District has high radiation levels throughout the district, but the national government has so far refused to designate anywhere in the district as "evacuation recommended" area.If the government designate an area as such, the government has to pay for the relocation cost. As the result, the designation in other cities like Date City has been very arbitrary and spotty, rendering the whole exercise worthless. Often, the residents are simply moved to the other parts of the same city with slightly lower radiation.
  • Judging from Professor Yamauchi's air radiation survey (in Japanese), this particular location looks like the one that had 23 microsieverts/hour radiation at 1 centimeter off the surface of the dirt in the roadside drain. Professor Yamauchi hypothesized that radioactive cesium from surrounding mountains and forests washes down the drain after the rain, and naturally gets concentrated in the dirt.
  • In my communication with Professor Yamauchi, I asked if the decontamination as currently practiced in Fukushima works at all, given the non-result in Watari District which he surveyed. He said the spot decontamination like removing the dirt and sludge is useless as radioactive materials simply come from somewhere else, so the district-wide decontamination including the surrounding mountains would be necessary to "decontaminate" in the true sense of the word - to remove radioactive materials, not reduce.
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  • He also said that spraying water with high-pressure washers hardly work at all on concrete and asphalt surfaces, as radioactive cesium is now deeply embedded in the concretes and asphalt. The only way to decontaminate concrete and asphalt, the professor said, was to physically remove all concrete structures - houses, fences, pavement, etc., which he said would destroy the neighborhood. He is of the opinion that all the residents in the district should be evacuated first, with the government paying for the cost, and the experts should get to work to truly "decontaminate".Professor Yamauchi also wryly observed the the word for "decontamination" in Japanese, 除染 (jo-sen), is misleading. Looking at the characters for the word, it does mean "removing the contamination". So by doing the "jo-sen" work people think they are removing the contamination, when all they may achieve is to reduce the level of contamination somewhat (not much, if Watari District is any indication). He even said it was as if the government was encouraging "decontamination" so as not to evacuate people.
  • Or in the case of Minami Soma City, it is as if the residents in contaminated areas could feel comfortable enough to remain there by doing the "decontamination" work, as one volunteer related in the US ABC News interview in August. "If this radiation is going to stick around here for five to 10 years, we have to learn to live with it,"she said, instead of moving away from the high radiation area. For her, shoveling dirt from the kindergarten playground was a way to live with "it".17,000 people live in Watari District, with beautiful mountains and water. It is dubbed "hidden paradise" in Fukushima City for the scenery like this
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Japan gov't finds 165 locations over wide area with cesium-137 exceeding Chernobyl evac... - 1 views

  • Survey Finds Radiation Over Wide Area in Japan, Wall Street Journal, August 30, 2011:
  • The first comprehensive survey of soil contamination from the Fukushima Daiichi nuclear plant showed that 33 locations spread over a wide area have been contaminated with long-lasting radioactive cesium, the government said Tuesday. The survey of 2,200 locations within a 100-kilometer (62-mile) radius of the crippled plant found that those 33 locations had cesium-137 in excess of 1.48 million becquerels per square meter, the level set by the Soviet Union for forced resettlement after the 1986 Chernobyl disaster. Another 132 locations had a combined amount of cesium 137/134 over 555,000 becquerels per square meter, the level at which the Soviet authorities called for voluntary evacuation and imposed a ban on farming. [...] the latest data point to the possibility that cesium could also be washing away and spreading to other areas, potentially contaminating rivers, lower-lying land and the ocean. [...]
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Cesium in incinerator dust across east Japan [31Aug11] - 0 views

  • High levels of cesium isotopes are cropping up in dust at 42 incineration plants in seven prefectures, including Chiba and Iwate, an Environment Ministry survey of the Kanto and Tohoku regions shows.
  • According to the report, released late Saturday, the highest cesium levels in the dust ranged from 95,300 becquerels in Fukushima Prefecture and 70,800 becquerels in Chiba Prefecture to 30,000 becquerels in Iwate Prefecture.
  • But even the lower levels in the dust exceeded 8,000 becquerels per kilogram in Ibaraki, Tochigi, Gunma and Tokyo. The 16-prefecture survey covered 469 incinerator operators in Tohoku and Kanto from late June, and was reported to a panel of experts at the ministry that is discussing how to safely bury incinerator ash and dust with cesium levels above 8,000 becquerels per kilogram.
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  • Local governments have been instructed to temporarily store their ash and dust at disposal sites until the panel reaches a conclusion. The ministry said it will ask the prefectures to continue monitoring radiation levels in the material. Incinerator ash containing cesium was detected at seven facilities in Fukushima Prefecture, the report said.
  • The Environment Ministry asked prefectures to monitor cesium levels after dust with 9,740 becquerels per kilogram was found at an incineration plant in Tokyo's Edogawa Ward in June. Before that, the only prefectures that had collected and released such data were Gunma and Ibaraki. The other prefectures that took part in the survey were Miyagi, Akita, Yamagata, Saitama, Kanagawa, Niigata, Yamanashi, Nagano and Shizuoka.
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Cesium in Incinerator Dust Across East Japan [28Aug11] - 0 views

  • High levels of cesium isotopes are cropping up in dust at 42 incineration plants in seven prefectures, including Chiba and Iwate, an Environment Ministry survey of the Kanto and Tohoku regions shows.
  • According to the report, released late Saturday, the highest cesium levels in the dust ranged from 95,300 becquerels in Fukushima Prefecture and 70,800 becquerels in Chiba Prefecture to 30,000 becquerels in Iwate Prefecture. But even the lower levels in the dust exceeded 8,000 becquerels per kilogram in Ibaraki, Tochigi, Gunma and Tokyo.
  • The 16-prefecture survey covered 469 incinerator operators in Tohoku and Kanto from late June, and was reported to a panel of experts at the ministry that is discussing how to safely bury incinerator ash and dust with cesium levels above 8,000 becquerels per kilogram. Local governments have been instructed to temporarily store their ash and dust at disposal sites until the panel reaches a conclusion.
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  • The ministry said it will ask the prefectures to continue monitoring radiation levels in the material.
  • Incinerator ash containing cesium was detected at seven facilities in Fukushima Prefecture, the report said. The Environment Ministry asked prefectures to monitor cesium levels after dust with 9,740 becquerels per kilogram was found at an incineration plant in Tokyo's Edogawa Ward in June. Before that, the only prefectures that had collected and released such data were Gunma and Ibaraki. The other prefectures that took part in the survey were Miyagi, Akita, Yamagata, Saitama, Kanagawa, Niigata, Yamanashi, Nagano and Shizuoka.
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Quake's jolts were double nuke plant's design - North Anna Plant, USA [08Sep11] - 5 views

shared by D'coda Dcoda on 08 Sep 11 - No Cached
  • The magnitude-5.8 earthquake last month in Virginia caused about twice as much ground shaking as a nearby nuclear power plant was designed to withstand, according to a preliminary federal analysis.
  • Parts of the North Anna Power Station in Mineral, Va., 11 miles from its epicenter, endured jolts equal to 26% of the force of gravity (0.26g) from some of the higher-frequency vibrations unleashed by the quake, said Scott Burnell, spokesman of the Nuclear Regulatory Commission.
  • An NRC document says the reactors' containment structure was built to withstand 12% of the force of gravity (0.12g.) Dominion, the power company that operates the plant, says parts of the plant can handle up to 0.18g.STORY: Quake readiness of nuclear power plants unclear
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  • "It's the things inside the buildings that may have been shaken more than the design called for," Burnell said, adding that the buildings themselves appear to have been less affected. He said the analysis is based on a seismograph reading taken about 30 miles away by the U.S. Geological Survey.
  • Whatever the final numbers on shaking or ground motion, the plant withstood the jolts, Burnell said, indicating there's a "great deal" of safety margin."That margin was certainly enough for North Anna this time," he said.
  • "Maybe you shouldn't rely on the margin," said Edwin Lyman at the Union of Concerned Scientists, an organization critical of nuclear energy. "The jury is still out," he said, on whether the plant was adequately designed.The two reactors at the North Anna plant, which began operation in 1978 and 1980, have remained closed since the Aug. 23 quake. They automatically shut down after losing off-site power. Backup diesel generators kept their cores cool until electricity was restored several hours later.
  • Dan Stoddard, Dominion's senior vice president of operations, said Friday that initial readings from the facility's scratch plates and other monitors indicate its shaking during the quake exceeded its design, but he declined to give numbers. Dominion officials plan to brief the NRC today on those findings.
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