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IAEA team praises Japan after Fukushima visit [14Oct11] - 0 views

  • A team of experts from the International Atomic Energy Agency praised Japan on Friday for steps it has taken to reduce radiation exposure for the public, particularly children, near the crippled Fukushima Dai-ichi nuclear plant.During a nine-day trip, the IAEA team visited schools, farms and government offices outside the 20-mile (12-kilometer) exclusion zone surrounding the power plant, which was damaged by a March 11 earthquake and tsunami.In a preliminary report submitted to the government, the 12-member team said Japan had developed "an efficient program for remediation — allocating the necessary legal, financial and technological resources to bring relief to the people affected by the accident, with priority being given to children."
  • The report noted efforts to decontaminate schools and some 400 playgrounds — mostly by volunteers, many of them parents of students. Towns around the exclusion zone have begun washing down public areas and removing topsoil in parks and school yards.It was the U.N. atomic agency's second major mission to Japan since the nuclear crisis began. Its purpose was to assess Japan's strategy and plans to reduce radiation exposure in areas around Fukushima prefecture.
  • No one has died from radiation in the nuclear crisis, but concerns remain high over how the lingering contamination will affect Fukushima's youth. On Sunday, local doctors began a long-term survey of children in the region for thyroid abnormalities, a problem linked with radiation exposure.In Ukraine, more than 6,000 cases of thyroid cancer have been detected in people who were children or adolescents when they were exposed to high levels of fallout immediately after the 1986 Chernobyl nuclear disaster. Japan's nuclear safety agency has said the radiation that leaked from the Fukushima plant was about one-sixth of that released from Chernobyl.
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  • Tero Tapio Varjoranta, deputy chief of the IAEA team, told a news conference in Tokyo that many of the Chernobyl cancer cases came from drinking milk that contained radioactive cesium, but that Japan's food controls in this area were in "very good order."The IAEA has "done a lot of work to learn the lessons from Chernobyl," he said.
  • The report also urged Japanese authorities to help the public focus on dose levels — the amount of radiation an individual is exposed to — rather than the contamination of certain areas or objects that could be far from the closest humans."Contamination means radioactivity somewhere. Dosage is how it affects me," Varjoranta explained.The team found Japan's radiation monitoring system was "very good, very extensive," said leader Juan Carlos Lentijo, adding that it would detect any dangerous spike in radiation.The Fukushima accident forced about 100,000 people living around the plant to be evacuated, and many now live in temporary homes or shelters, uncertain of when they will be able to return to their homes. Some Japanese officials say it could be years.
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Citizens' forum queries nuclear 'experts' [23Oct11] - 0 views

  • To whom does scientific debate belong? That was a central question raised by many of the 200-plus people who attended a citizens' forum in Tokyo on Oct. 12, as they criticized the ways in which the Japanese government and radiation specialists working for it are assessing and monitoring the health effects of the ongoing nuclear disaster at the Fukushima No. 1 nuclear power plant. The daylong conference, organized by the Japanese citizens' groups SAY-Peace Project and Citizens' Radioactivity Measuring Station (CRMS), featured experts who dispute much of the evidence on which the government has based its health and welfare decisions affecting residents of Fukushima Prefecture and beyond. Organizers of the event were also demanding that the government take into consideration the views of non-experts — and also experts with differing views from those of official bodies such as the International Commission on Radiological Protection (ICRP). The Japanese government has constantly referred to the ICRP's recommendations in setting radiation exposure limits for Fukushima residents.
  • One of the driving forces for the citizens' forum was a desire to challenge the conduct and much of the content of a conference held Sept. 11-12 in Fukushima, titled the "International Expert Symposium in Fukushima — Radiation and Health Risk." That conference, sponsored by the Nippon Foundation, involved some 30 scientists from major institutions, including the ICRP, the World Health Organization, the International Atomic Energy Agency and the United Nations Scientific Committee on the Effects of Atomic Radiation. Although the proceedings were broadcast live on U-stream, the event itself was — unlike the Tokyo forum — closed to the public. Some citizens and citizens' groups claimed that this exclusion of many interested and involved parties — and the event's avowed aim of disseminating to the public "authoritative" information on the health effects of radiation exposure — ran counter to the pursuit of facilitating open and free exchanges among and between experts and citizens on the many contentious issues facing the nation and its people at this critical time.
  • In particular, there was widespread criticism after the Fukushima conference — which was organized by Shunichi Yamashita, the vice president of Fukushima Medical University and a "radiological health safety risk management advisor" for Fukushima prefectural government — that its participants assumed from the outset that radioactive contamination from the plant's wrecked nuclear reactors is minimal. Critics also claimed that the experts invited to the conference had turned a collective blind eye to research findings compiled by independent scientists in Europe in the aftermath of the 1986 Chernobyl nuclear disaster in present-day Ukraine — specifically to findings that point to various damaging health consequences of long-term exposure to low-level radiation. So it was that those two citizens' groups, angered by these and other official responses to the calamity, organized the Oct. 12 conference held at the National Olympics Memorial Youth Center in Shibuya Ward. Among the non-experts and experts invited to attend and exchange their views were people from a wide range of disciplines, including sociology, constitutional law and pediatrics. On the day, some of the speakers took issue with the stance of the majority of official bodies that the health damage from Chernobyl was observed only in a rise in the number of cases of thyroid cancers.
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  • Eisuke Matsui, a lung cancer specialist who is a former associate professor at Gifu University's School of Medicine, argued in his papers submitted to the conference that the victims of Chernobyl in the neighboring present-day country of Belarus have suffered from a raft of other problems, including congenital malformations, type-1 diabetes and cataracts. Matsui cited a lengthy and detailed report of research by the Russian scientists Alexey V. Yablokov, Vassily B. Nesterenko and Alexey V. Nesterenko that was published in 2007, and republished in English in 2009 by the New York Academy of Sciences under the title "Chernobyl: Consequences of the Catastrophe for People and the Environment." Matsui stressed that, based on such evidence, the Japanese government should approve group evacuations of children — at the expense of the plant's operator, Tokyo Electric Power Co. — from certain parts of Fukushima Prefecture. He cited some areas of the city of Koriyama, 50 to 60 km from the stricken nuclear plant, where soil contamination by radioactive cesium-137 has reached 5.13 Curies per sq. km. That is the same as in areas of Ukraine where residents were given rights to evacuate, Matsui said. In fact in June, the parents of 14 schoolchildren in Koriyama filed a request for a temporary injunction with the Fukushima District Court, asking it to order the city to send their children to schools in safer areas.
  • In the ongoing civil suit, those parents claim that the children's external radiation exposure has already exceeded 1 millisievert according to official data — the upper yearly limit from all sources recommended by the ICRP for members of the public under normal conditions. Following a nuclear incident, however, the ICRP recommends local authorities to set the yearly radiation exposure limit for residents in contaminated areas at between 1 and 20 millisieverts, with the long-term goal of reducing the limit to 1 millisievert per year. Meanwhile, Hisako Sakiyama, former head researcher at the National Institute of Radiological Sciences, delved into the non-cancer risks of exposure to radiation. In her presentation, she referred to a report compiled in April by the German Affiliate of International Physicians for the Prevention of Nuclear War (IPPNW). Titled "Health Effects of Chernobyl: 25 years after the reactor catastrophe," this documents an alarmingly high incidence of genetic and teratogenic (fetal malformation) damage observed in many European countries since Chernobyl.
  • Sakiyama also pointed out that the German report showed that the incidence of thyroid cancer due to radiation exposure was not limited to children. For instance, she cited IPPNW survey findings from the Gomel district in Belarus, a highly-contaminated area, when researchers compared the incidence of thyroid cancer in the 13 years before the Chernobyl explosion and the 13 years after. These findings show that the figures for the latter period were 58 times higher for residents aged 0-18, 5.3 times higher for those aged 19-34, 6 times higher for those aged 35-49, and 5 times higher for those aged 50-64. "In Japan, the government has a policy of not giving out emergency iodine pills to those aged 45 and older (because it considers that the risk of them getting cancer is very low),"' Sakiyama said. "But the (IPPNW) data show that, while less sensitive compared to children, adults' risks go up in correspondence with their exposure to radioactivity."
  • Further post-Chernobyl data was presented to the conference by Sebastian Pflugbeil, a physicist who is president of the German Society for Radiation Protection. Reporting the results of his independent research into child cancers following the Chernobyl disaster, he said that "in West Germany ... with an exposure of 1 millisievert per year, hundreds of thousands of children were affected." He noted, though, that any official admissions regarding health damage caused by the 1986 disaster in the then Soviet Union came very slowly and insufficiently in Europe. Indeed, he said the authorities denied there were health risks for years afterward. In response, an audience member who said he was a science teacher at a junior high school in Kawaguchi, Saitama Prefecture, asked Pflugbeil to exactly identify the level of exposure beyond which residents should be evacuated. While acknowledging that was a very difficult question, the German specialist noted later, however, that he would think pregnant women should probably leave Fukushima — adding, "I have seen many cases over the years, but I come from Germany and it's not easy to judge (about the situation in Japan)."
  • At a round table discussion later in the day, as well as discussing specific issues many participants made the point that science belongs to the people, not just experts — the very point that underpinned the entire event. As Wataru Iwata, director of the Fukushima-based citizens' group CRMS, one of the forum's organizers (which also conducts independent testing of food from in and around Fukushima Prefecture) put it: "Science is a methodology and not an end itself." In the end, though the citizens' forum — which ran from 9:30 a.m. to 10 p.m. — arrived at no clear-cut conclusions, organizers said that that in itself was a good outcome. And another conference involving citizens and scientists is now being planned for March 2012.
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Greenpeace criticises Japan radiation screening, 50% seafood samples contain Cesium [20... - 0 views

  • Greenpeace called on Tokyo to toughen radiation screening and food labelling rules on Thursday after it said low levels of radiation had been detected in seafood sold at Japanese stores.The environmental pressure group said it tested 60 seafood samples bought at stores in eastern Japan operated by five major supermarket chains and found 34 of them with radioactive caesium-134 and caesium-137.The survey discovered readings of up to 88 becquerel per kilogram with the radiation believed to be from the ongoing nuclear accident."While the samples are well below the 500 becquerel per kilogram limit set by the authorities, the contaminated seafood still represents a health risk, especially to pregnant women and children, and it is being distributed over a wide area," said Wakao Hanaoka, Greenpeace Japan oceans campaigner.
  • The Japanese standard compares with a 150 becquerel per kilogram limit in Ukraine after the 1986 Chernobyl disaster, the group said."More concerning, however, is that there is no labelling that notifies consumers if the seafood had been screened, making it impossible for them to make informed decisions," Hanaoka said in a statement.The announcement came as Japanese consumers remain frustrated over limited information about the exact level of food contamination, while the government has sought to calm public fears and overcome mistrust of official radiation surveys.Authorities say food is safe but consumers have generally avoided products from the regions near the wrecked Fukushima Daiichi nuclear plant, which went through meltdowns and explosions after the March 11 earthquake and tsunami.
  • Greenpeace, which bought the samples in September and October, has requested the government and a retail industry body to improve seafood product screening and to publicise the level of contamination in the labels.The group has sent letters to the Japan Chain Stores Association demanding them to conduct radiation checks on their own and disclose the results to consumers.Comprehensive screening and labelling should help protect consumers and raise their confidence in food they purchase, said Greenpeace's Hanaoka, adding that it should eventually help the fishing industry."Japanese consumers have legitimate concerns about the food they buy," Greenpeace's Hanaoka said.
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Gov't confirms 57.7 microsievert/hr near Tokyo is linked to Fukushima meltdowns - "High... - 0 views

  • According to Kyodo, the “Kashiwa hot spot [is] linked to Fukushima” and Japan’s Science Ministry “reverses government claims after [an] on-site survey finds high amounts of cesium.” When the local government received a report about the 57.7 microsieverts per hour measurement at the site, it said the radiation was unlikely to be related to the Fukushima disaster. However, “On Sunday, the science ministry and the city government [...] said it is highly likely that rain tainted with fallout from the Fukushima plant was running into nearby soil,” reports Kyodo. “The ministry has confirmed that rain water is leaching out of the ditch and into the soil at the spot, ministry officials said at a new conference Sunday,” the article notes. Read More: Kashiwa hot spot linked to Fukushima Background information on the 57.7 microsieverts in Kashiwa, 18 miles northeast of Tokyo
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Worst Nuclear Disasters - Civilian [15Apr11] - 0 views

  • The top civilian nuclear disasters, ranked by International Nuclear and Radiological Event Scale. Worst Civilian Nuclear Disasters 1. Chernobyl, Soviet Union (now Ukraine) April 26, 1986 INES Rating: 7 (major impact on people and environment)
  • The worst nuclear disaster of all time resulted from a test of the reactor’s systems. A power surge while the safety systems were shut down resulted in the dreaded nuclear meltdown. Fuel elements ruptured and a violent explosion rocked the facility. Fuel rods meted and the graphite covering the reactor burned. Authorities reported that 56 have died as a direct result of the disaster—47 plant workers and nine children who died of thyroid disease. However, given the Soviet Union’s tendency to cover up unfavorable information, that number likely is low.  International Atomic Energy Agency reports estimate that the death toll may ultimately be as high as 4,000. The World Health Organization claims that it’s as high as 9,000. In addition to the deaths, 200,000 people had to be permanently relocated after the disaster. The area remains unsuitable for human habitation. 2. Fukushima, Japan March 11, 2011 INES Rating: 7 (major impact on people and environment) Following a 9.0 magnitude earthquake and tsunami, Japan’s Fukushima nuclear power facility suffered a series of ongoing equipment failures accompanied by the release of nuclear material into the air. The death toll for this currently is at two but is expected to rise and as of April 2011, the crisis still ongoing. A 12 mile evacuation area has been established around the plant.
  • 3. Kyshtym, Soviet Union Sept. 29, 1957 INES Rating: 6 (serious impact on people and environment) Poor construction is blamed for the September 1957 failure of this nuclear plant. Although there was no meltdown or nuclear explosion, a radioactive cloud escaped from the plant and spread for hundreds of miles. Soviet reports say that 10,000 people were evacuated, and 200 deaths were cause by cancer.
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  • 4. Winscale Fire, Great Britain Oct. 10, 1957 INES Rating: 5 (accident with wider consequences) The uranium core of Britain’s first nuclear facility had been on fire for two days before maintenance workers noticed the rising temperatures. By that time, a radioactive cloud had already spread across the UK and Europe. Plant operators delayed further efforts in fighting the fire, fearing that pouring water on it would cause an explosion. Instead, they tried cooling fan and carbon dioxide. Finally, they applied water and on Oct. 12, the fire was out. British officials, worried about the political ramifications of this incident, suppressed information. One report, however, says that in the long run, as many as 240 may have died from accident related cancers. 5.
  • Three Mile Island, Pennsylvania, US March 28, 1979 INES Rating: 5 (accident with wider consequences) Failure of a pressure valve resulted in an overheating of the plant’s core and the release of 13 million curies of radioactive gases. A full meltdown was avoided when the plant’s designers and operators were able to stabilize the situation before contaminated water reached the fuel rods. A full investigation by the US Nuclear Regulatory Commission suggests that there were no deaths or injuries resulting from the incident.
  • 6. Golania, Brazil Sept, 1987 INES Rating: 5 (accident with wider consequences) Scavengers at an abandoned radiotherapy institute found a billiard ball sized capsule of radioactive cesium chloride, opened it and then sold it to a junkyard dealer. The deadly material was not identified for more than two year, during which time it had been handled by hundreds, including some who used the glittery blue material for face paint. Of the 130,000 tested, 250 were discovered to be contaminated and 20 required treatment for radiation sickness. Four died, including the two who originally found the capsule, the wife of the junkyard owner and a small girl who used the powder as face paint. 7. Lucens, Switzerland January 1, 1969 INES Rating: 5 (accident with wider consequences) When the coolant on a test reactor facility in a cave in Switzerland failed during startup, the system suffered a partial core meltdown and contaminated the cavern with radioactivity. The facility was sealed and later decontaminated. No known deaths or injuries.
  • 8. Chalk River, Canada INES Rating: 5 (accident with wider consequences) May 24, 1958 Inadequate cooling lead to a fuel rod fire, contaminating the plant and surrounding labs. 9. Tokaimura,Japan Sept. 30, 1999 INES Rating: 4 (accident with local consequences) The nuclear plant near Tokai had not been used for three years when a group of unqualified workers attempted to put more highly enriched uranium in a precipitation tank than was permitted. A critical reaction occurred and two of the workers eventually died of radiation exposure. Fifty six plant workers and 21 others also received high doses of radiation. Residents within a thousand feet of the plant were evacuated.
  • 10. National Reactor Testing Station, Idaho Falls, Idaho January 3, 1961 INES Rating: 4 (accident with local consequences) Improper withdrawal of a control rod led to a steam explosion and partial meltdown at this Army facility. Three operators were killed in what is the only known US nuclear facility accident with casualties. In addition to these, there have been a number of deadly medical radiotherapy accidents, many of which killed more people than the more commonly feared nuclear plant accidents: 17 fatalities – Instituto Oncologico Nacional of Panama, August 2000 -March 2001. patients receiving treatment for prostate cancer and cancer of the cervix receive lethal doses of radiation.[7][8] 13 fatalities – Radiotherapy accident in Costa Rica, 1996. 114 patients received an overdose of radiation from a Cobalt-60 source that was being used for radiotherapy.[9]
  • 11 fatalities – Radiotherapy accident in Zaragoza, Spain, December 1990. Cancer patients receiving radiotherapy; 27 patients were injured.[10] 10 fatalities – Columbus radiotherapy accident, 1974–1976, 88 injuries from Cobalt-60 source. 7 fatalities – Houston radiotherapy accident, 1980.Alamos National Laboratory.[18] 1 fatality – Malfunction INES level 4 at RA2 in Buenos Aires, Argentina, operator Osvaldo Rogulich dies days later.
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Expert: Radioactive materials reached Kanto via 2 routes [28Oct11] - 0 views

  • Radioactive materials from the damaged Fukushima No. 1 nuclear plant reached the Kanto region mainly via two routes, but they largely skirted the heavily populated areas of Tokyo and Kanagawa Prefecture, an expert said. Relatively high levels of radioactive cesium were detected in soil in northern Gunma and Tochigi prefectures and southern Ibaraki Prefecture after the Fukushima No. 1 nuclear power plant was damaged by the March 11 Great East Japan Earthquake and tsunami. But contamination was limited in Tokyo and Kanagawa Prefecture, where 22 million people live. Hiromi Yamazawa, a professor of environmental radiology at Nagoya University, said the first radioactive plume moved through Ibaraki Prefecture and turned northward to Gunma Prefecture between late March 14 and the afternoon of March 15.
  • Large amounts of radioactive materials were released during that period partly because the core of the No. 2 reactor at the Fukushima No. 1 plant was exposed. "The soil was likely contaminated after the plume fell to the ground with rain or snow," Yamazawa said, adding that western Saitama Prefecture and western Tokyo may have been also contaminated. Rain fell in Fukushima, Tochigi and Gunma prefectures from the night of March 15 to the early morning of March 16, according to the Meteorological Agency. The second plume moved off Ibaraki Prefecture and passed through Chiba Prefecture between the night of March 21 and the early morning of March 22, when rain fell in a wide area of the Kanto region, according to Yamazawa's estimates.
  • He said the plume may have created radiation hot spots in coastal and southern areas of Ibaraki Prefecture as well as around Kashiwa, Chiba Prefecture. Yamazawa said the plume continued to move southward, without approaching Tokyo or Kanagawa Prefecture, probably because winds flowed toward a low-pressure system south of the Boso Peninsula. "It rained slightly because the low-pressure system was not strong," said Takehiko Mikami, a professor of climatology at Teikyo University. "Contamination in central Tokyo might have been more serious if (the plume) had approached more inland areas." According to calculations by The Asahi Shimbun, about 13,000 square kilometers, or about 3 percent of Japan's land area, including about 8,000 square kilometers in Fukushima Prefecture, have annual exposure levels of 1 millisievert or more.
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  • Gunma and Tochigi prefectures have a combined 3,800 square kilometers with an annual exposure of 1 millisievert or more. Among Tokyo's 23 wards, Katsushika Ward had the highest radiation level of 0.33 microsievert per hour, according to a science ministry map showing radioactive contamination for 12 prefectures. The ward government has been measuring radiation levels in seven locations once a week since late May. It plans to take measurements at about 500 public facilities, such as schools and parks, in response to residents' demands for detailed surveys.
  • The Gunma prefectural government has measured radiation levels in 149 locations since September and has identified six northern mountainous municipalities with an annual exposure of 1 millisievert or more. Earlier this month, the prefectural government asked 35 municipalities to decide whether radioactive materials will be removed. High radiation levels were detected in Minakami, Gunma Prefecture, known as a hot spring resort. Mayor Yoshimasa Kishi said the town could be mistaken as a risky place if it decides to have radioactive materials removed. The science ministry's map showed that 0.2 to 0.5 microsievert was detected in some locations in Niigata Prefecture. Niigata Governor Hirohiko Izumida said the figures were likely mistaken, noting that these locations have high natural radiation levels because of granite containing radioactive materials.
  • The prefectural government plans to conduct its own surveys of airborne radiation levels and soil contamination. Many municipalities are calling for financial support for removing radioactive materials. In Kashiwa and five other cities in northern Chiba Prefecture, radioactive materials need to be removed over an estimated 180 square kilometers of mainly residential areas. The Kashiwa city government is providing up to 200,000 yen ($2,620) to kindergartens and nursery schools for removal work. But some facilities have asked children's parents to help pay the costs because they cannot be covered by the municipal assistance.
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Koriyama City in Fukushima to Feed School Kids with Local Rice Harvested This Year [04N... - 0 views

  • Did anyone say in the comment section that it was a duty of adults to protect children? I guess not in Koriyama City, which is located in high-radiation "Nakadori" (middle third) of Fukushima Prefecture and where 500,000 becquerels/kg of radioactive cesium was found in the rice hay.The city will start using this year's rice harvested in the city in the school lunches, starting next Tuesday. Since the new rice harvested in Fukushima is all cleared for shipping as the sampling test has proven it is "safe", it is just a matter of time till it's fed to the most vulnerable and without voice - children. Just as the Fukushima government, headed by THAT governor, has been pushing ever since declaring "safety" on October 12.Fukushima Chuo TV news (11/4/2011) via Nippon TV:
  • Koriyama City has decided to use the new rice harvested in the city for school lunches starting next week. Today, the city explained the radiation detection system to the parents.
  • Koriyama City will require JA Koriyama, who will ship the rice, to conduct voluntary testing of radioactive materials, and will start using the city's newly harvested rice in school lunches starting Tuesday November 8.
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  • Today, about 50 parents and the city officials visited the local JA, where the JA officials explained the testing procedures.
  • JA will test both brown rice and polished rice before shipping, for radioactive materials.
  • Also, other municipalities in Fukushima Prefecture will switch to the new crop of rice starting next month. They are currently deciding on whose rice to use. Pressure is of course on to use the rice harvested in Fukushima, which even some rice farmers wouldn't feed their family members with (see my post here, bottom third).
  • For consumers outside Fukushima Prefecture, there is no way of telling whether a bag of new rice contains Fukushima rice, if it is a bag of "blended" rice. There is no requirement to list the places of origin if the rice from different locations are blended. All the label will say is "made in Japan".Convenience store "bento" and "onigiri" is very likely to feature rice from Fukushima. Some stores at least prominently declare that they use Fukushima rice.
  • While consumers can still avoid, if they want to, Fukushima rice by avoiding "blended" rice and avoiding buying bento at convenience stores, school children cannot.A nation is utterly broken when the leaders think nothing of using children as propaganda tools, and excoriate those citizens who dare raise their voices. It's not just Fukushima Prefecture either.No end in sight of Japanese nuclear horror.
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Government Official's Ultimate "Performance": Drink Up Fuku-I Water [31Oct11] - 0 views

  • Yasuhiro Sonoda, 44-year-old official in the Cabinet Office, made good on his promise and drank the treated water from Reactors 5 and 6 basements. Iodine-131 and radioactive cesium were ND (not detected). If TEPCO's analysis of the water the other day is correct, there is no alpha nuclide, but with a good dose of tritium (H-3).The photo is from Sankei Shinbun (10/31/2011). It was top news at NHK.The Japanese government is good at proceeding fast with totally meaningless performance, and the Japanese media is good at reporting it.
  • According to Sankei, the water was taken from the storage tank of treated water on October 22, and it was boiled to remove any bacteria.Someone asked Sonoda in this press conference, "Is there anything that you do that has made progress?" (as tweeted by Ryuichi Kino, independent journalist)
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Intelligent absorbent removes radioactive material from water 01Nov11[ - 0 views

  • Nuclear power plants are located close to sources of water, which is used as a coolant to handle the waste heat discharged by the plants. This means that water contaminated with radioactive material is often one of the problems to arise after a nuclear disaster. Researchers at Australia's Queensland University of Technology (QUT) have now developed what they say is a world-first intelligent absorbent that is capable of removing radioactive material from large amounts of contaminated water, resulting in clean water and concentrated waste that can be stored more efficiently. The new absorbent, which was developed by a QUT research team led by Professor Huai-Yong Zhu working in collaboration with the Australian Nuclear Science and Technology Organisation (ANSTO) and Pennsylvania State University, uses titanate nanofiber and nanotube technology. Unlike current clean-up methods, such as a layered clays and zeolites, the new material is able to efficiently lock in deadly radioactive material from contaminated water and the used absorbents can then be safely disposed of without the risk of leakage - even if the material were to become wet.
  • When the contaminated water is run through the fine nanotubes and fibers, the radioactive Cesium (Cs+) ions are trapped through a structural change. Additionally, by adding silver oxide nanocrystals to the outer surface, the nanostructures are able to capture and immobilize radioactive iodine (I-) ions used in treatments for thyroid cancer, in probes and markers for medical diagnosis, and also found in leaks of nuclear accidents. "One gram of the nanofibres can effectively purify at least one ton of polluted water," Professor Zhu said. "This saves large amounts of dangerous water needing to be stored somewhere and also prevents the risk of contaminated products leaking into the soil." "Australia is one of the largest producers of titania that are the raw materials used for fabricating the absorbents of titanate nanofibres and nanotubes. Now with the knowledge to produce the adsorbents, we have the technology to do the cleaning up for the world," added Professor Zhu.
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Fukushima Plant Released Record Amount of Radiation [30Oct11] - 0 views

  • The destroyed Fukushima nuclear plant in Japan was responsible for the biggest discharge of radioactive material into the ocean in history, a study from a French institute said. The radioactive cesium that flowed into the ocean from the Fukushima Dai-Ichi nuclear plant was 20 times the amount estimated by its owner, Tokyo Electric Power Co., according to the study by the Institute for Radiological Protection and Nuclear Safety, which is funded by the French government. It’s the second report released in a week calling into question estimates from Japan’s government and the operator of the plant that was damaged in the March earthquake and tsunami. Tokyo Electric’s Fukushima station may have emitted more than double the company’s estimate of atmospheric release at the height of the worst civil atomic crisis since Chernobyl in 1986. End Extract http://mobile.bloomberg.com/news/2011-10-31/fukushima-plant-released-record-amount-of-radiation-into-ocean?category=%2Fnews%2Fmostread%2F
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