Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 June 2011)
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Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 June 2011)

Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 June 2011)

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Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 June 2011) Presentation Transcript

  • 1. Fukushima Nuclear AccidentRadiological Monitoring  and Consequences 2 June 2011
  • 2. Gamma Dose Rate in 47 Prefectures  on  31 May Fukushima prefecture: 1.5 µSv/h 
  • 3. Gamma Dose Rates in 7 Prefectures 24 March – 31 MayNatural background: 0.1 microSievert/hour
  • 4. Gamma dose rate in the East of Fukushima prefecture
  • 5. Concentration in air of I‐131 and Cs‐137 detectedat Fukushima Daiichi West Gate (at a distance of 1 Km to NPPs)
  • 6. Deposition of I‐131 and Cs‐137 in 47  prefectures• I‐131  – Not detected since 18 May• Cs‐137 – Detected in a few prefectures over a few days – Low levels ranging from 2.2 to 91 Bq/m2
  • 7. Protective actions • Drinking water: All restriction lifted • The Government of Japan has announced  evacuation measures: – Beyond distances of 30 km from Fukushima  Nuclear Power Plants  – NISA: evacuation of the “Planned Evacuation  Zones” within Iitate village and Kawamata town  commenced on 15 May.
  • 8. Food Monitoring and Food Restrictions (Reported 19 – 31 May)• 818 samples from 18 prefectures• Over 40% of monitoring is in Fukushima prefecture• Over 93% of samples indicated Cs‐134 /Cs‐137 or I‐131  were not detected or were below the Japanese  regulation values• Less than 7% were above the Japanese regulation values  for Cs‐134 /Cs‐137 and/or I‐131• Restrictions on the distribution and/or consumption of  specific foods in certain areas of Fukushima and Ibaraki  prefectures remain in place
  • 9. 350 Total number of food samples tested between 19 and 31 May 2011 300 300 250Number of samples Neg 200 Cs-total Cs-total & I-131 150 116 100 77 55 50 39 36 33 32 28 22 18 11 9 9 9 6 4 4 2 2 2 2 1 1 0 Prefecture
  • 10. 20 Food samples above the regulation values between 19 and 31 May 2011 18 16 Cs-total 14 Cs-total & I-131Number of samples 12 12 10 10 8 7 6 4 4 3 3 2 2 2 2 2 2 1 1 1 0 Prefecture / Date of sampling
  • 11. 20 Food samples above the regulation values between 19 and 31 May 2011 18 16 Cs-total 16 Cs-total & I-131 14Number of samples 12 10 10 9 8 6 6 5 4 2 2 1 1 1 1 0 Chiba / tea Fukushima / Fukushima / Fukushima / Fukushima / Fukushima / Fukushima / Gunma / tea Ibaraki / tea Tochigi / tea Algae Fishery Fruit Mushroom tea Tree / products perennial plant shoots Prefecture / food type