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Fukushima Nuclear Accident
Radiological Monitoring
  and Consequences

       12 April 2011
Gamma Dose Rate in 7 Prefectures
     24 March – 12 April
Gamma Dose Rate in 47 Prefectures on 11 April
                        Fukushima prefecture: 2.1 µSv/h
                        Natural background: 0.1µSv/h
Daily deposition of I-131 (Bq /m2)
          1 to 11 April
Daily deposition of Cs-137 (Bq /m2)
           1 to 11 April
IAEA measurements
                            Route A: North to North West from F-NPP
                                   Gamma dose rate (µSv/h)



                    10
                                                               Tsuruha - Soma
                                                               Tsuruha - Kashima
                                                               Kawachi - Soma
Dose Rate (µSv/h)




                                                               Entry point to Soma city
                                                               Onami


                     5




                     0
                            25.03.2011          29.03.2011             09.04.2011

                     IAEA
IAEA measurements
                                   Route A: North to North West from F-NPP
                                    Beta + gamma contamination (MBq/m2)


                           1.5
                                                                             Tsuruha - Soma
                                                                             Tsuruha - Kashima
                                                                             Kawachi - Soma
Beta+gamma contamination




                                                                             Entry point to Soma city
                                                                             Onami
                            1
        (MBq/m2)




                           0.5




                            0

                                   25.03.2011          29.03.2011            09.04.2011

                            IAEA
Monitoring of drinking water
               12 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
Radiation Monitoring in Foodstuffs
                  (MHLW, Japan)

• 8th and 10-11 April
• 21 samples
• 8 prefectures
• Various vegetables, spinach and other leafy
  vegetables, fruit (strawberry), various meats, seafood
  and unprocessed raw milk
• I-131, Cs-134 and/or Cs-137:
   • either not detected
   • Or below the regulation values set by the
       Japanese authorities

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Fukushima Radiological Monitoring and Consequences - 12 April 2011

  • 1. Fukushima Nuclear Accident Radiological Monitoring and Consequences 12 April 2011
  • 2. Gamma Dose Rate in 7 Prefectures 24 March – 12 April
  • 3. Gamma Dose Rate in 47 Prefectures on 11 April Fukushima prefecture: 2.1 µSv/h Natural background: 0.1µSv/h
  • 4. Daily deposition of I-131 (Bq /m2) 1 to 11 April
  • 5. Daily deposition of Cs-137 (Bq /m2) 1 to 11 April
  • 6. IAEA measurements Route A: North to North West from F-NPP Gamma dose rate (µSv/h) 10 Tsuruha - Soma Tsuruha - Kashima Kawachi - Soma Dose Rate (µSv/h) Entry point to Soma city Onami 5 0 25.03.2011 29.03.2011 09.04.2011 IAEA
  • 7. IAEA measurements Route A: North to North West from F-NPP Beta + gamma contamination (MBq/m2) 1.5 Tsuruha - Soma Tsuruha - Kashima Kawachi - Soma Beta+gamma contamination Entry point to Soma city Onami 1 (MBq/m2) 0.5 0 25.03.2011 29.03.2011 09.04.2011 IAEA
  • 8. Monitoring of drinking water 12 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
  • 9. Radiation Monitoring in Foodstuffs (MHLW, Japan) • 8th and 10-11 April • 21 samples • 8 prefectures • Various vegetables, spinach and other leafy vegetables, fruit (strawberry), various meats, seafood and unprocessed raw milk • I-131, Cs-134 and/or Cs-137: • either not detected • Or below the regulation values set by the Japanese authorities