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30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
30 March 2011 Fukushima Nuclear Power Plant's  Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment
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30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment

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  • 1. Marine Environment - Fukushima NPPs Potential Impact on the Marine Environment – Assessment of IAEA Environmental Laboratories on Data provided by Japan IAEA-Environmental Laboratories, Monaco
  • 2. Seawater sampling off Fukushima (26 March 2011) carried out by Japanese Authorities <ul><li>Seawater sampling locations of Japanese Authorities </li></ul><ul><li>Transect about 30 km offshore, sample locations separated by 10 kilometres </li></ul><ul><li>Levels of dose rates were also measured as indicated </li></ul>
  • 3. Temporal trend on concentrations Data submitted by Japanese authorities Cs-137
  • 4. Temporal trend on concentrations Data submitted by Japanese authorities I-131
  • 5. Monitoring of the Marine environment <ul><li>Comparison of Cs-137 seawater concentration with historical data </li></ul><ul><li>30 km offshore surface water concentrations are 3 to 4 orders of magnitude higher than the values measured in 2005 </li></ul><ul><li>330 m East of Fukushima Dai-ichi concentrations are up to 3 orders of magnitude higher than the values measured offshore </li></ul>1 10 3 10 4 10 5 10 6 10 2 10 1 10 7 10 8 April 2005 30 km Bq.m -3 [1 – 10 1 ] 1 10 3 10 4 10 5 10 6 10 2 10 1 10 7 10 8 24, 25 March 2011 Bq.m -3 [10 3 – 10 4 ] [10 5 – 10 7 ]
  • 6. Cs-137 Bq.m -3 Monitoring of the Marine environment seawater concentration <ul><li>30 km : </li></ul><ul><ul><li>28 march, Concentrations increase at station 5 </li></ul></ul><ul><ul><li>Spatial distribution is more heterogeneous </li></ul></ul><ul><li>20 km : </li></ul><ul><ul><li>New station since 28 of march #9 </li></ul></ul><ul><li>300 m : </li></ul><ul><ul><li>Concentrations increase 2 orders of magnitude since 28 March </li></ul></ul>TEPCO MEXT 28 march, depth 132 m : Cs -137 not detected
  • 7. Temporal trends of concentration in seawater 330 m east of Discharge point Units 1 to 4
  • 8. Temporal trends of concentrations in seawater at Units 5/6
  • 9. Modelling Dispersion of an arbitrary initial discharge Courtesy to the Group SIROCCO of the Observatoire Midi-Pyrenées of the University of Toulouse, CNRS Animations to be seen at: http://sirocco.omp.obs-mip.fr/outils/Symphonie/Produits/Japan/SymphoniePreviJapan.htm
  • 10. Modelling Dispersion of an arbitrary initial discharge
  • 11. Modelling Dispersion of an arbitrary initial discharge
  • 12. Modelling Modelling of the deposition on the sea surface and subsequent concentration

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