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Fukushima Nuclear AccidentRadiological Monitoring   and Consequences        2 June 2011
Gamma Dose Rate in 47 Prefectures  on  31 May          Fukushima prefecture: 1.5 µSv/h 
Gamma Dose Rates in 7 Prefectures        24 March – 31 MayNatural background: 0.1 microSievert/hour
Gamma dose rate in the East of Fukushima prefecture
Concentration in air of I‐131 and Cs‐137 detectedat Fukushima Daiichi West Gate (at a distance of 1 Km to NPPs)
Deposition of I‐131 and Cs‐137 in 47              prefectures• I‐131   – Not detected since 18 May• Cs‐137  – Detected in ...
Protective actions • Drinking water: All restriction lifted • The Government of Japan has announced   evacuation measures:...
Food Monitoring and Food Restrictions        (Reported 19 – 31 May)• 818 samples from 18 prefectures• Over 40% of monitori...
350                       Total number of food samples tested between 19 and 31 May 2011                               300...
20           Food samples above the regulation values between 19 and 31 May 2011                    18                    ...
20                   Food samples above the regulation values between 19 and 31 May 2011                    18            ...
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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)

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

  1. 1. Fukushima Nuclear AccidentRadiological Monitoring  and Consequences 2 June 2011
  2. 2. Gamma Dose Rate in 47 Prefectures  on  31 May Fukushima prefecture: 1.5 µSv/h 
  3. 3. Gamma Dose Rates in 7 Prefectures 24 March – 31 MayNatural background: 0.1 microSievert/hour
  4. 4. Gamma dose rate in the East of Fukushima prefecture
  5. 5. Concentration in air of I‐131 and Cs‐137 detectedat Fukushima Daiichi West Gate (at a distance of 1 Km to NPPs)
  6. 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. 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. 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. 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. 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. 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
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