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Technical Briefing on the Radiological Situation in Japan, 19 March 2011

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Technical Briefing on the Radiological Situation in Japan, 19 March 2011

  1. 1. Technical Briefing on theRadiological Situation in Japan<br />19th March 2011<br />
  2. 2. Gamma-dose rate in microSv/h in various Prefectures<br />2<br />
  3. 3. Gamma dose rates<br />3<br />
  4. 4. Information provided by MEXT<br />
  5. 5. Gamma dose rates near Tokai and Tokyo<br />5<br />
  6. 6. Gamma-dose rate at Togichi, 140 km South West (microSv/h)<br />Passage of the radioactive plume<br />Resulting exposure pathways are<br /><ul><li>External exposure from the cloud
  7. 7. Inhalation of contaminated air during the passage of the plume</li></ul>Background<br />14 March<br />16 March<br />17 March<br />15 March<br />
  8. 8. IAEA Environmental Measurements in Japan 19 March 2011 at public locations<br />
  9. 9. Recent IAEA Environmental Measurements in Japan 19 March 2011 at selected locations<br />Location:  Hasuda (Saitama Prefecture), 25 km from Tokyo<br /><ul><li>Dose rate: 0.04 microSv/h
  10. 10. Gross alpha count: 0 cps
  11. 11. Gross beta and gamma count: 127 cps  </li></ul>Location:  Tamikochi  (Saitama Prefecture), 110 km from Tokyo<br /><ul><li>Dose rate: 0.18 microSv/h
  12. 12. Gross alpha count: 0.2 cps
  13. 13. Gross beta and gamma count: 240 cps </li></ul>Location: Nasugogem(Saitama Prefecture), 170 km from Tokyo<br /><ul><li>Dose rate: 2.9 microSv/h
  14. 14. Gross alpha count: 0 cps
  15. 15. Gross beta and gamma count: 2300 cps </li></li></ul><li>9<br />Locations<br />

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