Radiological Monitoring and Consequences - 19 April 2011
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Radiological Monitoring and Consequences - 19 April 2011 Presentation Transcript

  • 1. Fukushima Nuclear Accident
    Radiological Monitoring
    and Consequences
    19 April 2011
  • 2. Gamma Dose Rates in 7 Prefectures24 March – 18 April
    Natural Background: 0.1 µSv/h
  • 3. Gamma Dose Rate in 47 Prefectures on 18 April
    Fukushima prefecture: 1.9 µSv/h
  • 4. Daily deposition of I-131 (Bq /m2)1 to 18 April
  • 5. Daily deposition of Cs-137 (Bq/m2)1 to 18 April
  • 6. IAEA measurements
    Route D: West of the F-NPP
    Gamma dose rate (µSv/h) from 23 March to 18 April
  • 7. IAEA measurements
    Route D: West F-NPP
    Beta + gamma contamination (MBq/m2)
  • 8. Monitoring of Radioactivity in FoodstuffsReported on 18 April by MHLW
    23 samples
    • April 8,15, 17and 18
    • 9. 8 prefectures (Chiba, Fukushima, Gunma, Hokkaido, Ibaraki, Niigata, Saitama and Yamagata).
    • 10. Analytical results for:
    • 11. various vegetables and leafy vegetables (8 samples)
    • 12. shiitake mushrooms (4),
    • 13. a fruit (strawberry),
    • 14. a fish (salmon) and
    • 15. unprocessed raw milk (9)
    • 16. I-131, Cs-134 and/or Cs-137 were either not detected or were belowthe regulation values set by the Japanese authorities.
  • Monitoring of drinking water19 April
    I-131 and Cs-137 are far below restriction levels in all prefectures
    Recommendations for restrictions for infants based on I-131 in place in 1 village of Fukushima prefecture as precautionary measure