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Zu einer kleinen Einführung, hier entlang.

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Viel Spaß, André & Andi vom physikBlog.

Radioaktivität in der Nahrung - Gefährliche Verharmlosung eines ernsten Problems
  • AnonymousAnonymous Juli 2011
    @Silene

    Strahlentelex gilt in der Fachwelt als unseriös. Sorry das ist wirklich so.

    http://www.nuklearmedizin.de/leistungen/news/japanfilm.php?navId=141

    Das Video auf dieser Seite stammt von der Jahrestagung deutscher Nuklearmediziner. Diese Fachleute haben über Strahlentelex, Greenpeace und anderen Organisationen wenig gutes zu sagen.

    Und was die obigen Berechnungen angeht erscheinen mir die Werte viel zu hoch. Da ich heute am Sonntag jedoch weder Zeit noch Lust habe das nachzurechnen werde ich mir die Seite mal bookmarken.
  • SileneSilene Juli 2011
    Anonymous said:

    Das Video auf dieser Seite stammt von der Jahrestagung deutscher Nuklearmediziner. Diese Fachleute haben über Strahlentelex, Greenpeace und anderen Organisationen wenig gutes zu sagen.


    Warum wohl?
    Nuklearmediziner sind auf die Versorgung mit Nukliden angewiesen (z.B. durch Forschungsreaktoren wie den NRU der Chalk River Laboratories) und produzieren natürlich auch nicht unerhebliche Mengen strahlender Abfälle, deren Entsorgung ein heikles Thema ist.
    Je niedriger die Grenzwerte sind, desto mehr Material muss aufgefangen und gelagert werden (z.B. in der Asse). Die Probleme fangen ja schon beim Abwasser einer nuklearmedizinischen Station an. Das fängt man erstmal auf und lässt es abklingen, bevor man es dann in die Kanalisation einleitet. Wen wundert es da, dass Nuklearmediziner etwas voreingenommen sind, wenn es um die Gefahren schwach radioaktiver Abfälle geht. Natürlich wünscht man sich höhere Grenzwerte.

    Was die Kompetenz betrifft, mögliche Folgen der Freisetzung radioaktiver Substanzen zu diskutieren, möchte ich es einfach mal so ausdrücken: Würde ich mich denn an einen Internisten wenden, wenn mich die Auswirkungen von Antibiotikarückständen oder Hormonen in der Umwelt interessieren? Eher nicht, denn das ist einfach nicht seine Baustelle.
  • SileneSilene Juli 2011
    [Yomiuri Shimbun] Shutdown of cattle shipments? / Drastic measure mulled by Fukushima govt after cesium scare
    University of Tokyo Prof. Noboru Manabe, an expert on livestock science, said eating beef containing radioactive cesium beyond the regulated maximum would not damage a person's health.

    "However, if beef like that can be distributed on the market, it can damage people's trust in the meat industry as a whole. I think it's necessary [for the government] to test all cattle suspected to have been irradiated," Manabe said.


    [Asahi Shimbun] Beef from Fukushima found with high levels of radioactive cesium
    According to Fukushima prefectural government officials, the rancher raised the cattle indoors and also stored all the feed given to them indoors.

    The body surfaces of the cattle in question were tested June 26, but no radioactive materials were detected.


    A prefectural government official said, "We do not know why radioactive materials that are 4.6 times the standards were detected."


    [NHK] Cesium found in hay fed to beef cattle
    The farmer says the cows had been kept inside but were fed with hay left outdoors after the March nuclear accident.

    Eleven cows from the farm were sent to Tokyo to be slaughtered. The beef from the animals contained levels of cesium that were more than triple the legal limit. The prefecture has asked farmers in the city to suspend beef cattle shipments.
  • SileneSilene Juli 2011
    [EX-SKF] Update on Fukushima Beef: It Was the Feed That Had 75,000 Becquerels/Kg Cesium
    From NHK Japanese (7/11/2011):
    Regarding the case of radioactive cesium in excess of the national provisional safety limit in the beef from the meat cow shipped from Minami Soma City in Fukushima Prefecture, 75,000 becquerels/kilogram of radioactive cesium has been detected from the hay that the cattle farmer used to feed the cows. The farmer kept the hay outside after the Fukushima I Nuclear Plant accident. Fukushima Prefecture continues to investigate.
  • SileneSilene Juli 2011
    [TEPCO] Support Activities for Fukushima
    -We actively purchase farm products from Fukushima Prefecture for our company’s cafeterias and dormitories. (Purchased since March 28)
    Gilt das auch für die Geschäftsführung, oder nur für die Arbeiter auf dem Gelände?
  • SileneSilene Juli 2011
    [NHK] Cattle shipped from specified zones to be tested
    In an interview with NHK on Monday, Otsuka said tests should be conducted in areas near the Fukushima plant evacuation zone.

    He said it would be good to test all cattle around the nation but not realistic given the limited resources.
  • SileneSilene Juli 2011
    [NHK] Expert: contaminated beef poses no problem
    An expert on nuclear medicine says eating meat contaminated with the radioactive substance cesium on a few occasions will not cause health problems.

    Keigo Endo is the president of Kyoto College of Medical Science.

    He says Japan's safety limit for cesium is stricter than in the United States or Europe where a large amount of meat is consumed.

    Endo says eating 500 grams of meat containing the safety limit of cesium for at least 200 days would add up to 1 millisievert of radiation.

    However, he says the government should work out measures immediately to prevent beef containing cesium above the safety limit from reaching the market including stepping up checks.
  • SileneSilene Juli 2011
    [Yomiuri Shimbun] "Govt to survey cesium absorption / Study will seek to determine how much cesium cows take in through feed
    The National Institute of Livestock and Grassland Science, a facility in Tsukuba, Ibaraki Prefecture, overseen by the farm ministry, will carry out the research on 10 cows each for milk and meat. It will take several weeks to get results for dairy cattle and several months for meat cattle, according to the sources.

    The ministry aims to announce the research findings by the end of this fiscal year, the sources said.

    Seiji Sukemori, a professor of Tokyo University of Agriculture, said, "As the nation is aiming to boost its self-sufficiency for feed such as grass, it is important to collect domestic data on the rate of absorption of radioactive matter from grass."

    Rinder nehmen Caesium und Strontium mit der Nahrung auf. Das ist bei japanischen Tieren nicht anders als es bei denen in der Ukraine oder in Weißrussland war. Seit Monaten weiss man, dass Heu und Weideland in Japan weiträumig mit Caesium belastet sind, (Link1, Link2, Link3). Damit ist klar, dass japanische Rinder in den nächsten Monaten und Jahren eine Menge Caesium aufnehmen werden, wenn man kein unbelastetes Futter zukauft.

    Worum geht es bei dieser Studie also wirklich? Das kann man leicht zwischen den Zeilen lesen: es geht um die Frage, wie man den wirtschaftlichen Schaden so gering wie möglich halten kann. Es geht darum, den "optimalen" Futtermix zu finden. Wie viel belastetes Futter kann man den Rindern geben, ohne dass die Grenzwerte im Fleisch oder der Milch überschritten werden? Man will den gesetzlichen Spielraum möglichst gut ausnutzen, ohne dabei Alarm auszulösen.
  • TimTim Juli 2011
    > Retten, was zu retten ist
    http://www.dradio.de/dlf/sendungen/forschak/1503655/

    Vier Monate nach der Havarie von Fukushima ist klar, dass Japan sehr viel Glück gehabt hat, weil der Wind den größten Teil des radioaktiven Fallouts aufs Meer hinaus trug. Schon die wenigen Tage, in denen er aufs Land blies, haben gereicht, um in einigen Gebieten so hohe Kontaminationen zu hinterlassen, dass Menschen dort für Jahrzehnte nicht leben können. Und immer noch werden neue Zonen gefunden, in denen die Belastung so hoch ist, dass die Bevölkerung evakuiert werden sollte.

    Derzeit läuft in den betroffenen Gebieten eine große Messaktion, um die lokalen Strahlendosen zu bestimmen und damit die Grundlage für Entscheidungen zu treffen, wer zurück kann und wer nicht. Es werden aber auch Maßnahmen erprobt, die Belastung zu senken - und die Wissenschaftler werden ungeduldig, weil alles so lange dauert.


    5 Minuten Audiobeitrag
  • SileneSilene Juli 2011
    Sehr informativ. Danke, Tim!
  • SileneSilene Juli 2011
    [NHK] Radioactive cesium detected in Fukushima shiitake
    Radioactive cesium exceeding the government standard has been detected in shiitake mushrooms grown indoors in 2 cities in Fukushima Prefecture, about 60 kilometers from the troubled Fukushima Daiichi nuclear plant. This is the first detection of radioactive cesium exceeding the standard in produce grown in greenhouses in the prefecture since the nuclear accident.

    The Fukushima prefectural government says 1,770 becquerels per kilogram of radioactive cesium was detected in mushrooms grown in Date City. The level is more than 3 times the provisional government limit of 500 becquerels per kilogram.

    560 becquerels of radioactive cesium was detected in mushrooms from Motomiya City.
  • TimTim Juli 2011
    > Beef Contamination Spreads in Japan as Fukushima Radiation Taints Straw
    http://www.bloomberg.com/news/2011-07-15/beef-contamination-spreads-in-japan-as-cattle-eat-radiation-tainted-straw.html

    More beef from cattle in Japan that ate straw tainted by radiation has found its way into the food supply, deepening concern about the safety of meat as the country struggles to contain the spread of the contamination.

    Cattle at the farm in Asakawa, about 60 kilometers from the crippled Fukushima Dai-Ichi nuclear station, were fed with rice straw containing 97,000 becquerels of cesium per kilogram, compared with the government standard of 300 becquerels, said Hidenori Ohtani at the livestock division of the Fukushima prefectural government. The farm shipped 42 cattle in the past three months to slaughterhouses in Tokyo, Kanagawa, Chiba and Miyagi prefectures, which were processed into meat and sold to distributors, he said.

    ...

    The ministry was unaware of the risk to cattle from tainted straw produced by local rice growers, Agriculture Minister Michihiko Kano told reporters in Tokyo today. “It was beyond imagination that rice straw was collected from the field in the spring,” Kano said.

    ...


    Ein weiterer Artikel zum Thema welches ein paar Posts weiter oben von Silene schon angesprochen wurde.

  • SileneSilene Juli 2011
    [EX-SKF] 84 Additional Meat Cows That Ate Radioactive Hay Already Shipped to 5 Prefectures
    From Mainichi Shinbun Japanese (2:41PM JST 7/16/2011):

    According to the Fukushima prefectural government, the cattle farms were located in Koriyama City (2 farms), Kitakata City (2 farms) and Soma City (1 farm). The rice hay from one farm in Koriyama City tested 500,000 becquerels/kg of radioactive cesium. In the farm in Soma City, the hay had 123,000 becquerels/kg cesium, and in Kitakata, 39,000 becquerels/kg.
    Dass noch mehr Rinder betroffen sind, ist ja nicht weiter verwunderlich.
    Aber die Werte von 500000 Bq/kg Radiocaesium im Heu sind jenseits von Gut und Böse, insbesondere da Koriyama mehr als 50 km vom Kraftwerk entfernt ist .
  • @ Centrillon

    Es ist aus meiner Sicht keine Panikmache, denn man muss sich einfach klarmachen, dass die Aktivitäten in den Grundnahrungsmitteln angekommen sind. Man sollte einfach einmal aufzeigen, was ein Durchschnittsjapaner isst, und dann das ganze einmal KUMULIERT betrachten. Die Cs - Isotope stören mich nur wenig, aber andere Isotope wie Sr haben das Potential sich im Körper als Ca Ersatz einzunisten und das sind die Dinge, die man beachten muss. Daher finde ich es gut, dass Silene hier alles postet in diesem Zusammenhang. Eine tabellarische Übersicht wann, was und wieviel in welchen Lebensmitteln gefunden wurde, wäre genial zu haben.
  • SileneSilene Juli 2011

    Eine tabellarische Übersicht wann, was und wieviel in welchen Lebensmitteln gefunden wurde, wäre genial zu haben.


    Die gibt es, allerdings nicht in einer einzigen Tabelle: Beim MHLW (unter dem Punkt "Food", gleich nach den Press Releases) und bei der Fisheries Agency (nach Monaten zusammengefasst).
  • SileneSilene Juli 2011
    [Kyodo News] 435 more cows confirmed shipped from Fukushima, Niigata farms
    More cows were confirmed Monday to have been shipped after being fed rice straw contaminated with radioactive cesium, with 411 from seven farms in Fukushima Prefecture and 24 from a farm in Niigata Prefecture. [...]

    In trying to alleviate mounting concerns over possibly contaminated beef, the government is set to suspend shipments of beef cattle from Fukushima Prefecture as early as Tuesday, on the basis of a law governing measures in nuclear disasters.

    The latest development in Niigata Prefecture, however, will force the government to take further measures to tackle the issue. [...]

    The central government is considering halting beef cattle shipments from areas beyond Fukushima Prefecture, after ascertaining how widespread the contaminated straw is, according to government sources.

    The Miyagi prefectural government has begun interviewing all 915 farms that raise beef cattle in the prefecture on whether they have fed their cows rice straw that had been bundled after the nuclear disaster.

    It is expected to announce the outcome soon, possibly Tuesday, local government officials said.
  • ProsperoProspero Juli 2011
    Als Ergänzung
    "This is nothing less than a colossal blunder by our ministry. It was beyond our expectations that straw would become a source of radioactive contamination," a ministry official said."...The checks involved electronically measuring the amount of radioactive material on the surface of the animals' bodies. Shipment is allowed if the detected radioactive emissions are below 100,000 counts per minute. ...whereas testing a single animal for internal radioactivity takes about an hour.Also, germanium semiconductor devices used to conduct radioactivity checks cost 20 million yen each."

    http://www.yomiuri.co.jp/dy/national/T110717002520.htm
    http://www.bloomberg.com/news/2011-07-15/beef-contamination-spreads-in-japan-as-cattle-eat-radiation-tainted-straw.html
    http://mdn.mainichi.jp/mdnnews/news/20110715p2a00m0na002000c.html
    http://www.bloomberg.com/news/2011-07-14/beef-contaminated-by-radiation-intensifies-food-safety-concerns-in-japan.html
  • SileneSilene Juli 2011
    Update: [Kyodo News] 505 more cows found shipped after being fed tainted straw
    Also on Monday, it was confirmed that 70 cows from four farms in Yamagata Prefecture were shipped within the prefecture and to Tokyo after being fed with rice straw suspected of being similarly contaminated. This brought the total number of cows suspected of radioactive contamination to 505 and that of their shipping destinations to eight prefectures.
  • SileneSilene Juli 2011
    [Mainichi News] Miyagi man who sold contaminated straw blames gov't for scandal
    A man in Osaki, Miyagi Prefecture, who sold straw contaminated with high levels of radioactive cesium told the Mainichi on July 18 that he had never imagined that his straw was contaminated because the city is about 150 kilometers away from the crippled Fukushima No. 1 Nuclear Power Plant.

    "The wind was in a different direction immediately after the hydrogen explosions, so I never thought it was contaminated. I really feel sorry," the man said. [...]

    He said ordinary farmers cannot take steps to deal with such cases unless the state and Miyagi Prefecture forewarn them of the dangers of rice straw. "If there had been a possibility of danger, even if only slightly, authorities should have conducted surveys much earlier," he said.
  • AnonymousAnonymous Juli 2011
    Ich habe getrocknete Pilze des Bayerischen-Waldes, mit 10482Bq/kg einer Dekontamination unterzogen und nach der Behandlung unter 320Bq/kg gebracht. Der Abguss eine braune Masse, nur 0,05mm stark, auf der Messschale 200mm Ø (Kimmel P241) hatte 250000Bq/kg was aus den Pilzen geholt wurde sie sind ohne Geschmacksveränderung wieder essbar. Interessenten gesucht. Antonius.theiler@t-online.de Wildschweinfleisch, mit 8600Bq/kg aus dem Bayerwald, habe ich auch unter den Wert von 240 Bq/kg gebracht.

    (Anm. des Moderators: Die Telefon-Nummer wurde gelöscht, eMail reicht wohl. Wir sind auch nicht ganz sicher ob das Verkaufsangebot ernst gemeint ist, ansonsten wäre dieser Beitrag sehr grenzwertig).
  • ProsperoProspero Juli 2011
    Darf ich fragen, womit und wie Sie dekontaminiert haben?
  • SileneSilene Juli 2011
    Das MHLW meldet, dass auch Rinder aus der Präfektur Niigata deutlich mit Radiocaesium belastet sind. In zwei Fleischproben aus Agano (mehr als 130 km westlich vom Kraftwerk gelegen) wurden Werte von 236-368 Bq/kg gefunden.
  • SileneSilene Juli 2011
    [Kyodo News] Over 1,200 cows suspected to have eaten radioactive feed transported
    A total of 1,264 cows, suspected of being fed with rice straw containing high levels of radiation, have been transported to 45 of Japan's 47 prefectures, a Kyodo News tally showed Wednesday. [...]

    The first discovery of straw containing cesium has been reported in Iwate, following Fukushima and Miyagi, the prefectural government said. All three prefectures are in the northeast.

    In Iwate, up to 57,000 becquerels of cesium per kilogram was detected in straw given to cattle at five farms in Ichinoseki and Fujisawa, according to the prefectural government. Eighty-one cows were transported from 12 farms in the two municipalities.

    The amount of cesium reached 20,000 becquerels per kg in rice straw grown in Miyagi's Tome at a farm in adjacent Akita Prefecture and the straw grown in Tome was found to contain 9,380 becquerels of cesium at a farm in Fujinomiya, Shizuoka Prefecture, southwest of Tokyo.
  • SileneSilene Juli 2011
    [NHK] Contaminated rice straw found in 10 prefectures
    Inspectors on Wednesday detected 7 times the government-set maximum standard level of radioactive cesium in rice straw used by a farm in Shizuoka Prefecture. This pushes the number of prefectures where cattle were fed with contaminated straw to 10.

    Most of the rice straw in question was shipped from companies in Miyagi Prefecture, north of Fukushima, where the Fukushima Daiichi nuclear plant, responsible for the contamination, is located.
  • SileneSilene Juli 2011
    [EX-SKF] Japanese National Government, Fukushima Prefectural Government, Industry Groups Plan for Lifting the Shipment Ban on Fukushima Beef
    The shipment ban on meat cows in Fukushima was finally put in place on July 19, but on July 20 they already outlined the conditions for lifting the ban.

    Fukushima Prefecture hopes to lift the shipment ban placed on the cows in the prefecture by the end of July, according to Fukushima Minyu Shinbun (7/21/2011), a local paper in Fukushima Prefecture.

    From what Fukushima Minyu Shinbun describes, the conditions for lifting the ban have been already agreed upon between the parties involved (the national government, the Fukushima prefectural government, and the cattle industry groups).
  • SileneSilene Juli 2011
    [Mainichi News] Gov't to allow use of simpler radiation detectors for beef
    The government is set to allow inspection of beef for radiation contamination using more widely available, simpler detectors as it prepares to impose broader screening of beef cattle to contain the widening food scare, government officials said Friday.

    The decision comes as there is a limited number of the regularly used device, called a germanium semiconductor detector, available to monitor radioactive materials in beef from all cattle in areas where straw containing radioactive cesium above the government-set limit has been found. [...]

    The government is considering setting a more stringent safety limit for inspection with the basic detectors and requiring a subsequent detailed check for beef screened out by the initial monitoring.

    The equipment for quick inspection costs about one tenth of the more-than 20 million yen germanium semiconductor detector and takes one hour or less to gauge radioactive materials, against multiple hours for the conventional device.

    20 Millionen Yen entsprechen etwa 180.000 EUR. In Anbetracht der Situation sollte die Regierung lieber eine größere Zahl hochwertiger Germaniumdetektoren zu günstigen Konditionen einkaufen. Sie wird sie in den nächsten 50 Jahren noch brauchen.

    Haben die Entscheidungsträger noch immer nicht begriffen, dass es hier um eine langfristige gesundheitliche Bedrohung ihrer Bevölkerung geht? Improvisierte Massnahmen und Rhetorik allein werden sie nicht abwenden.

    Es muss ein feinmaschiges und empfindliches Messnetz aufgebaut werden, damit man in Zukunft Hunderte von Nahrungsmittelproben pro Monat untersuchen kann. Dazu braucht man geeignete Labors mit hochwertigem Equipment und qualifiziertem Personal. Bei einer Hightech-Nation wie Japan, die sich 17 Kernkraftwerke leisten kann, ist das wohl nicht zuviel verlangt.
  • SileneSilene Juli 2011
    [Reuters] Japan nuclear scare triggers run for radiation checks
    "We are even receiving orders all the way from western Japan. The distribution of (contaminated) beef has made them realize this is not someone else's problem," said Akira Hanawa, president of Isotope Research Institute in Yokohama, near Tokyo. [...]

    It costs 15,000 yen ($190) to have his company run a radiation check on a sample, but that is not stopping a concerned public from placing orders, he said.

    Hanawa said his company receives about a hundred orders a day from local governments, agricultural cooperatives, exporters as well as individuals.

    "Our researchers are under a lot of strain. They have not taken even a day off, and have stayed at a nearby hotel ever since the disaster," Hanawa said.

    Another private research facility, Environmental Analysis Research Institute, located in Fukushima prefecture, has seen 10-15 orders a day for radiation checks, almost all of them from individual consumers.

    "It's ordinary households placing orders. It's your regular grandpas and grandmas who want to check if potatoes grown in home gardens are free from radiation before they feed them to their grandchildren," said Mihoko Kikuchi, president of the institute.

    "I myself as a mother wanted to know if I was raising my children in a safe environment. That's why I decided on the introduction of the testing device at the company in the first place," she said.

    After the Fukushima crisis, her company obtained a bank loan and bought the testing equipment for 15.5 million yen ($197,000), she said.

    "No one is telling public research entities to handle checks only for governments. But they are so inundated with orders from public institutions that they have little capacity left to handle other requests," said an official at the Education Ministry.
  • TimTim Juli 2011
    Respekt - was für ein Engagement!
  • TimTim Juli 2011
    > Ab November gilt Grenzwert für Uran im Trinkwasser (in Deutschland)
    http://foodwatch.de/kampagnen__themen/mineralwasser/trinkwasser/index_ger.html

    Ab 1. November 2011 darf in Deutschland kein Wasser mehr aus dem Hahn fließen, das mehr als 10 Mikrogramm Uran pro Liter enthält. Das ist ein großer Fortschritt für die Verbraucher, denn bisher gab es keinerlei gesetzliche Obergrenze. Jahrelang hatte foodwatch kritische Werte öffentlich gemacht und einen Grenzwert gefordert. Babies und Kleinkindern sind damit aber noch immer nicht ausreichend geschützt.


  • SileneSilene Juli 2011
    [Bloomberg] Threat to Japanese Food Chain Multiplies as Cesium Contamination Spreads
    Seafood Concerns

    “Some areas still have high radiation dosages and if you also eat products from these areas, you’ll get a considerable amount of radiation,” said Sentaro Takahashi, a professor of radiation control at Kyoto University in western Japan. “This is why the government needs to do something fast.”

    Radiation in food is measured in becquerel, a gauge of the strength of radioactivity in materials such as Iodine-131 and Cesium-137.

    As much as 2,300 becquerels of cesium a kilogram was detected in the contaminated beef, according to a July 18 statement from the health ministry. The government limit is 500 becquerels per kilogram.

    Seafood is another concern after cesium-134 in seawater near the Fukushima plant climbed to levels 30 times the allowed safety standards last week, according to tests performed by Tokyo Electric Power Co, national broadcaster NHK reported.

    Voluntary Testing

    “We need to monitor the cesium 134 level detected in seawater around the plant,” Tetsuo Ito, the head of the Atomic Energy Research Institute at Kinki University in central Japan, said by phone today. “The increase could be from seawater churned by swells from the recent typhoon, but it’s possible that contaminated groundwater leaked from the plant.”

    Japan has no centralized system to check for radiation contamination of food, leaving local authorities and farmers conducting voluntary tests.
    Products including spinach, mushrooms, bamboo shoots, tea, milk, plums and fish have been found contaminated with cesium and iodine as far as 360 kilometers from Dai-Ichi.
  • SileneSilene Juli 2011
    [EX-SKF] Radiation in Japan Spreads: Wheat, Rapeseeds in Fukushima, Rice Hay Outside Fukushima Far Exceeding Safety Limit
    From Asahi Shinbun (11:14PM JST 7/25/2011):

    Fukushima Prefecture announced on July 25 that radioactive cesium exceeding the provisional limit was detected from the wheat harvested at a farm in Hirono-machi [23 kilometers south of Fukushima I Nuke Plant] in Fukushima Prefecture. The prefectural government says the wheat hasn't been sold in the market. It is the first time that radioactive cesium exceeding the limit has been detected in wheat.

    According to the prefectural government, 630 becquerels/kg of radioactive cesium was found in a sample taken on July 19. The prefectural government has asked the farm to withhold shipment on a voluntary basis. Fukushima Prefecture ranks No. 25th in wheat production in Japan, with 651 tonnes produced last year.

    Also, 720 becquerels/kg of radioactive cesium has been detected in the rapeseeds harvested by a farm in Tamura City [41 kilometers west of Fukushima I Nuke Plant] in Fukushima. The rapeseeds haven't been shipped, and the prefectural government has asked the farm to withhold shipment on a voluntary basis.


    Also from Asahi (4:49AM JST 7/26/2011):

    Ibaraki Prefecture announced on July 25 that 64,000 becquerels/kg of cesium was detected from the rice hay collected at a farm in Takahagi City [83 kilometers south of Fukushima I Nuke Plant] in Ibaraki Prefecture. If reconstituted, the level of radioactive cesium in the hay would be 14,500 becquerels/kg, more than 48 times the national safety limit [for the feed] of 300 becquerels/kg. No cow has been shipped from this farm.
  • SileneSilene Juli 2011
    [NHK] Govt seeking voluntary ban on compost and humus
    Japan's government is calling on farmers not to use or sell compost and humus made in the east of the country since the start of the Fukushima nuclear crisis. [...]

    The agriculture ministry wants a voluntary ban on the use and sale of compost made of manure from cows that may have been fed the contaminated straw. The measure also applies to humus from fallen leaves.

    The ministry says the ban should continue until it draws up guidelines for levels of radioactive cesium in compost.

    Fazit: Landwirtschaftliche Produkte zu essen ist weiterhin kein Problem. Die Gefahr beginnt erst mit dem Kompostieren.
  • SileneSilene Juli 2011
    [Bloomberg] Japan Scientists Say Sea Radiation Tests May Miss Seafood Threat
    Japan’s government has to release more data from ocean radiation tests to accurately assess the contamination threat to seafood, according to a statement by the Oceanographic Society of Japan.

    The government should release radiation readings in sea water that are below its minimum measurement level, because even at those low quantities the radioactive elements may pose a danger when concentrated in seafood, the group, which counts 1,860 marine scientists as its members, said yesterday.

    “Depending on the species, fish have been known to accumulate as much as 100 times the amount of pollutants in the environment,” Jota Kanda, a professor at Tokyo University of Marine Science and Technology specializing in marine environment, said by phone yesterday.

    Radiation threats to Japan’s food chain are multiplying as cesium emissions from the crippled Fukushima Dai-Ichi nuclear power plant spread. Aeon Co., Japan’s biggest supermarket chain, said yesterday 4,108 kilograms (9,056 pounds) of beef suspected of being contaminated by radiation was inadvertently put on sale at 174 stores across the country. [...]

    Testing of seafood off the coast of Fukushima uncovered 68 cases of fish and marine life with radiation readings exceeding the government’s safety limit, according to a report by the Ministry of Health, Labour and Welfare.

    Radiated Fish

    Fukushima prefecture tested 505 seafood items to discover excessive radiation levels in 15 cases of sweetfish, seven cases of salmon, seven cases of greenling and six cases of sand lance, according the report. Ibaraki prefecture, south of Fukushima, reported 5 cases of excessive radiation levels after testing 265 samples.

    Seafood tests by 15 other prefectures found no other cases of contamination, according to the report. Miyagi prefecture, north of Fukushima tested 44 samples, while Iwate, further north, tested two samples.

    “The scope of testing needs to increase, especially in the neighboring prefectures of Miyagi and Iwate,” Kanda said. “In Chernobyl’s case, it took about six months to a year for cesium concentrations in fish to peak.”

    That said, the concentrated release of radioactive material into Fukushima’s coastal waters is “unprecedented,” Kanda said. [...]

    The minimum detection limit is defined as 4 becquerels per liter for Iodine-131, 6 bq/l for Cesium-134 and 9 bq/l for Cesium-137, the report said.
    “Which means that at 5 becquerels per liter the ministry will proclaim the water safe, but concentration in fish may exceed the 500 becquerel limit” per kilogram set by the government, Kanda said.
  • AnonymousAnonymous Juli 2011
    So langsam kommt die Wahrheit ans Licht.
    Weiss eigentlich jemand wieviel Meeresfrüchte aus den Fanggebieten FAO 61 und FAO 67 in die EU importiert und verarbeitet werden?
    In den nächsten Jahren landen die eh auf unseren Tellern. Bin mal gespannt, wie die EU darauf reagiert. Vermutlich werden die Grenzwerte nochmals angepasst werden müssen.
  • AnonymousAnonymous Juli 2011
    Oder die Discounter bieten LRF an. LRF = Low Radiation Food.....
    Lach
  • TimTim Juli 2011
    > 11 prefectures decide to test all beef cattle for radiation; expected to cost 4 billion yen
    http://mdn.mainichi.jp/mdnnews/news/20110728p2a00m0na016000c.html

    Eleven prefectures have decided as of July 27 to test all beef cattle for radiation contamination after radioactive cesium above the allowable level set by the central government was detected in cattle in some prefectures, and total costs for the measures are expected to reach around 4 billion yen, the Mainichi learned.

    ...

    But cesium tests are more complex than those for BSE, and there are only a limited number of measuring instruments.

    ...

    The costs will be paid temporarily by prefectural governments and cattle farmers. But the Miyagi Prefectural Government, which announced on July 27 that it would start testing on Aug. 1, made clear that it would seek damages from Tokyo Electric Power Co. (TEPCO). JA offices in Yamagata and Tochigi say they will follow suit. Niigata Gov. Hirohiko Izumida said, "We would like to deal with it after thinking of who should essentially pay for the tests."

    In the meantime, some of the eight prefectures including Aomori, Osaka and Kagoshima, which are considering testing all beef cattle for radiation contamination, are worried about the possibility of the measures restricting shipments because they cannot secure testing systems fast enough. An official of the cattle promotion department at the Hokkaido Prefectural Government said, "There are only two measuring instruments available and it takes three to four hours to test one beef cow. Considering the number of beef cows to be shipped, it is difficult to test all beef cattle." Eikei Suzuki, governor of Mie Prefecture, known for its "Matsusaka beef" brand, one of the top brands in Japan, said, "We want to make a final decision by the end of this month."

    ...


  • TimTim August 2011
    > Japan’s largest supermarket tests beef for radiation
    http://www.internationalsupermarketnews.com/news/4216

    Aeon, Japan’s largest supermarket chain, has carried out independent tests to ensure the safety of the beef products it sells.

    The move comes as the Japanese government requested a ban on shipments of cattle from a second prefecture, after detecting caesium levels as high as twice government-set limits in beef from six cattle from three areas in Miyagi.

    The request follows a ban on Fukushima beef this month, when it was found that more than 500 cattle, which had been fed rice straw contaminated with high levels of radioactive caesium, had been shipped to stores in Japan, with some of the beef containing caesium eight times the government limit.

    The detection of excess levels of caesium has caused havoc in beef markets. Prices have plunged and some farmers from the north-east region have stopped shipping cattle, as consumer demand sinks.

    And while Tokyo Electric is expected to compensate farmers for their loss, compensation for other affected parties, such as beef wholesalers, is unclear.

    Aeon has started independent testing all beef sold under its Topvalu brand in 115 stores. It plans to extend tests to cover all its stores across the country as testing machines, which are in extremely short supply, become more widely available.

    The government said that the effect of eating a kilogramme of beef with the maximum limit allowed for caesium in Japan is the equivalent to one-50th of an annual dosage from naturally occurring radioactive materials, and one-13th of levels received on a one-way flight between Tokyo and New York.

    However, what appear to be relatively low levels of exposure as yet have not alleviated fears about the safety of Japanese beef among many consumers.


  • JorindeJorinde August 2011
    Der Reis soll jetzt auch getestet werden, melden NHK, Mainichi und ex-SKF. Werte werden sicher niedriger liegen als im Rindfleisch, da die Tiere ja das Futter "akkumulieren". Aber dafür ist Reis ein Grundnahrungsmittel, das man in Japan nicht leicht vermeiden kann.
  • SileneSilene August 2011
    Andere Baustelle, ähnliches Problem:

    [Reuters] Vermont finds contaminated fish as nuclear debate rages
    Vermont health regulators said on Tuesday they found a fish containing radioactive material in the Connecticut River near Entergy's (ETR.N) Vermont Yankee nuclear power plant which could be another setback for Entergy to keep it running.

    The state said it needs to do more testing to determine the source of the Strontium-90, which can cause bone cancer and leukemia. [...]

    "One finding of (Strontium-90) just above the lower limit of detection in one fish sample is notable because it is the first time Strontium-90 has been detected in the edible portion of any of our fish samples," the Vermont Department of Health said on its website.

    The Health Department said it did not know how the Strontium-90, which is both naturally occurring in the environment and a byproduct of nuclear power production and
    nuclear weapons testing, got into the fish.

    "We cannot associate low levels of Strontium-90 in fish in the Connecticut River with Vermont Yankee-related radioactive materials without other supporting evidence," the report said.

    In den USA werden Fische demnach routinemäßig auf Strontium-90 hin untersucht. In Japan ist das selbst vier Monate nach dem GAU noch nicht der Fall. Falls doch, hat man die Daten nicht veröffentlicht.

    Übrigens irrt sich das Vermont Department of Health zumindest in einer Hinsicht: Strontium-90 ist ein künstlich erzeugtes Isotop, das normalerweise nicht in der Biosphäre vorkommt.
  • SileneSilene August 2011
    [Kyodo News] Japan to refrain from claiming safety of Japanese foods
    Japanese Foreign Minister Takeaki Matsumoto has instructed his ministry to refrain from claiming the safety of Japanese foods, changing its stance after radiation-contamination beef was found to have been sold to consumers in Japan, sources close to the matter said Sunday.

    The change is due to discoveries of radiation-contaminated meat from cattle fed rice straw laden with radioactive cesium spewed from the Fukushima Daiichi nuclear power plant, which was crippled by the March 11 earthquake and tsunami.
  • TimTim August 2011
    Als Info:
    Nach Mr. Masanori Miyahara, Deputy Director-General of the Fisheries Agency, brauchen sie einen Tag um Cäsium Werte (in Meerestieren/Meerwasser?) zu bestimmen, jedoch 3-4 Wochen für Strontium.

    Source: To Secure the Safety of Fishery Products (June 30, 2011) - ~ Minute 21

  • JorindeJorinde August 2011
    Und hier kommt, wie vermutet, die zukünftige radioaktive Belastung im Reis:

    Von ex-SKF-blogspot:


    Monday, August 8, 2011
    #Radioactive Rice to Come? Rice Growing in a Rice Paddy with 35,000 Becquerels/kg of Radioactive Cesium?

    No wonder the first trading of rice futures in Osaka fetched 40% premium over the exchange-suggested contract price.

    If this number is correct, the harvest season in Japan will be indeed "chaos".

    From the tweet of Ryuichi Kino, who has attended and reported on almost all TEPCO/government press conferences regarding the Fukushima accident since March, reporting on the TEPCO/government joint press conference on August 8: Germany's ZDF Television is here. Said 35,000 becquerels/kg [of radioactive cesium, most likely] has been found in the soil of a rice paddy planted with rice, and asked if the government does any thorough check. Hosono [minister in charge of the nuclear accident] consulted with his staff for a very long time, and said they will confirm the number. He said the government will check the rice as they grow in the rice paddies.

    The transfer factor from the soil to rice is considered to be about 0.1. 35,000 becquerels/kg in soil may result in 3,500 becquerels/kg of harvested rice, 7 times the provisional safety limit which is already far too loose for the staple like rice.

    I've found the video clip for this part. It's the rice paddy in Fukushima City. Fukushima City was OUTSIDE the evacuation zone of any kind, so the soil was apparently never tested by the prefectural government. The reporter asks the question in English, with a Japanese interpreter.
    (Video)
    Japanese people who watched the video or knew about it from Kino's tweets are thanking ZDF for having shown up and asked questions at the press conference. It's been a very long time any foreign media showed any interest in these conferences given by TEPCO/government on Fukushima I Nuke Plant and radiation contamination.

    I hope more foreign media (not their Japanese bureaus) will come and ask hard questions.

    35,000 becquerels/kg of cesium in soil would translate into 2,275,000 becquerels/square meter (35,000 x 65), which is way above the forced evacuation criterion in the Chernobyl accident (1,480,000 becquerels/square meter).


    Da kommt noch was auf die JapanerInnen zu.
    Hoffentlich wird wenigstens die Mafia aus Tepco, Behörden und Politikern, die versucht, auch jetzt noch zu verharmlosen, abgesägt.
  • TimTim August 2011
    Das stark abnehmende Interesse der Agenturen ist keine Überraschung wenn man sich ansieht wie diese ablaufen. Siehe hierzu: http://fukushima.physikblog.eu/discussion/comment/4852#Comment_4852
  • SileneSilene August 2011
    [Kyodo News] Excessive radioactive cesium found in Fukushima fish: Greenpeace
    Fish caught at a port about 55 kilometers from the crippled Fukushima Daiichi nuclear power plant contained radioactive cesium at levels exceeding an allowable limit, the environmental group Greenpeace said Tuesday.

    The samples taken at Onahama port in Iwaki, Fukushima Prefecture, in late July, included a species of rockfish that measured 1,053 becquerels per kilogram. The reading, the highest among the samples, is well in excess of the government-set limit of 500 becquerels per kilogram, according to a study conducted by the environmental group.

    The other samples, which were all rock trout, measured between 625 and 749 becquerels per kilogram, again exceeding the provisional limit.


    Siehe auch:
    [Greenpeace] Contaminated seafood and government cover-up at Fukushima
  • TimTim August 2011
    Die Haupt(fang)saison soll Sept-Nov sein, wenn ich den Fischereiminister richtig verstanden hab.
  • TimTim August 2011
    > Fukushima fish radiation excessive, Greenpeace says | The Japan Times Online
    http://search.japantimes.co.jp/cgi-bin/nn20110810a4.html

    Ein paar weitere Aspekte werden hier angesprochen.
  • hobbyphysikerhobbyphysiker August 2011
    http://www.ospar.org/documents/dbase/publications/p00503_French%20Implementation%20report%20of%20PARCOM%20Rec%2091_4.pdf

    Bin mir nicht ganz sicher, wo ich das posten soll. Es ist ein Bericht über die Emissionen von AKWs in Frankreich.

    Ansonsten ist die "normale" Tritiumbelastung schon ganz schön ordentlich, und die Hochrechnung zu Fukushima wird bestimmt spannend.

    Auf Basis der Seite 42 werde ich einmal versuchen, das Inventar bei Abschaltung einmal hochzurechnen und auf Basis der bekannten Messungen für Cs einmal zu ermitteln, was zusätzlich in den Reaktoren noch zu finden sein muesste. Dazu nehme ich noch die Isotope die von GRS bekannt gegeben wurden.

    http://fukushima.grs.de/radioaktive-stoffe-im-brennstab

    Und dazu noch einige gamma Analysen von Fukushima, die Liste wird ganz schön lang.
  • TimTim August 2011
    > Half of rice harvest to be tested for cesium
    http://search.japantimes.co.jp/cgi-bin/nn20110812n1.html
  • SileneSilene August 2011
    [NHK] Radioactive impact on wheat may be small
    Researchers in Japan have found that wheat absorbs a relatively small amount of radioactive cesium from its roots, and the impact of the substance on wheat grain may be small.

    The scientists at the University of Tokyo have been conducting research since immediately after the nuclear disaster at the Fukushima Daiichi nuclear power plant, jointly with Fukushima Prefecture, to study the impact of radioactive substances on farm products.

    They found 280,000 becquerels of radioactive cesium per kilograms in wheat leaves which had grown before the disaster and were exposed to the radiation from Fukushima. Meanwhile wheat grain which grew afterwards showed about 300 bequerels of cesium, or about one 1,000th of the cesium found in leaves.

    The scientists believe wheat absorbs only a small amount of radioactive cesium through its roots.

    They believe the substance does not migrate from leaves to the grain, the edible part, which makes the impact small.

    They also measured the distribution of radioactive cesium in rice paddies in Fukushima prefecture by collecting soil at 5 centimeter increments from the surface.

    96 percent of the cesium was found at the 5 centimeter level from the surface.

    The scientists will continue the research as they believe the impact of the radioactive cesium can be reduced significantly by removing the top soil.
  • WalterWalter August 2011
    Silene said:

    [NHK] Radioactive impact on wheat may be small



    96 percent of the cesium was found at the 5 centimeter level from the surface.

    The scientists will continue the research as they believe the impact of the radioactive cesium can be reduced significantly by removing the top soil.


    Also entseuchen wir mal einen kleinen Bauernhof. 1 Hektar 100 m*100 m *0,05 m = 500 Kubikmeter abzugrabende Erde.

    Kann man ja bequem neben dem Misthaufen lagern.

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