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Radiological Monitoring and Consequences

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Fukushima Nuclear Accident

7 April 2011

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Radiological Monitoring and Consequences

  1. 1. Fukushima Nuclear Accident<br />Radiological Monitoring <br />and Consequences<br />7 April 2011<br />
  2. 2. Gamma Dose Rates ( microSievert /hour) 14 March – 6 April<br />Natural Background: 0.1 microSv/hour<br />
  3. 3. Gamma Dose Rate in 47 Prefectures - 6 April<br />Natural background: 0.1µSv/h<br />Fukushima prefecture: 2.4 µSv/h <br />
  4. 4. Daily deposition of iodine-131 (Becquerel /m2)25 March to 5 April<br />
  5. 5. Daily deposition of cesium-137 (Becquerel /m2)25 March to 5 April<br />
  6. 6. Monitoring of drinking water7 April<br />Iodine-131 and cesium-137 well below restriction levels in all prefectures <br />Recommendations for restrictions based on iodine-131 remains in place in 1 village of Fukushima prefecture as precautionary measure <br />
  7. 7. IAEA measurements - Route DDose rate (µSv/h)<br />
  8. 8. Food Restrictions <br />As of 4 April, food restrictions (distribution and/or consumption) were in place<br /> Fukushima : leafy and flower-headed brassicas <br /> (broccoli, cauliflower)<br /> Ibaraki : unprocessed raw milk, parsley, spinach and kakina<br /> Tochigi and Gunma: spinach and kakina<br /> Chiba : spinach (KatoriCity and TakoTown) <br /> spinach and parsley (Asahi City)<br />
  9. 9. Radiation Monitoring in FoodstuffsReported 6 April by JAPAN (MHLW)<br /><ul><li>(Fukushima prefecture) From26 of 41 samples for various vegetables, spinach and other leafy vegetables </li></ul> - I-131, Cs-134, Cs-137 exceeded the regulation<br /> values set by the Japanese authorities.<br /><ul><li>(8 prefectures) From 52 of 78 samples for various vegetables, fruit (strawberry) and unprocessed raw</li></ul> milk<br /> - I-131, Cs-134, Cs-137 were either not detected <br /> or well below the regulation values set by the<br /> Japanese authorities <br />
  10. 10. Collaboration between IAEA and CTBTO <br />CTBTO provided to IAEA access to the data of its monitoring stations world-wide<br />WMO provided to IAEA a forecast of the movement of air masses in regional and global scale<br />IAEA, in collaboration with CTBTO and WMO estimated global distribution of radioactivity released <br />
  11. 11. International Monitoring Data submitted to IAEA<br />The following countries have submitted data on radioactivity in air: <br />Austria, Belgium, Bulgaria, Canada, China, Finland, France, Greece, Iran, Ireland, Italy, Malaysia, Poland, Romania, Russian Federation, Spain, Sweden, Switzerland, and Ukraine<br />All levels are very low <br />

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