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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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 Presentation Transcript

  • Marine Environment - Fukushima NPPs Potential Impact on the Marine Environment – Assessment of IAEA Environmental Laboratories on Data provided by Japan IAEA-Environmental Laboratories, Monaco
  • Seawater sampling off Fukushima (26 March 2011) carried out by Japanese Authorities
    • Seawater sampling locations of Japanese Authorities
    • Transect about 30 km offshore, sample locations separated by 10 kilometres
    • Levels of dose rates were also measured as indicated
  • Temporal trend on concentrations Data submitted by Japanese authorities Cs-137
  • Temporal trend on concentrations Data submitted by Japanese authorities I-131
  • Monitoring of the Marine environment
    • Comparison of Cs-137 seawater concentration with historical data
    • 30 km offshore surface water concentrations are 3 to 4 orders of magnitude higher than the values measured in 2005
    • 330 m East of Fukushima Dai-ichi concentrations are up to 3 orders of magnitude higher than the values measured offshore
    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 ]
  • Cs-137 Bq.m -3 Monitoring of the Marine environment seawater concentration
    • 30 km :
      • 28 march, Concentrations increase at station 5
      • Spatial distribution is more heterogeneous
    • 20 km :
      • New station since 28 of march #9
    • 300 m :
      • Concentrations increase 2 orders of magnitude since 28 March
    TEPCO MEXT 28 march, depth 132 m : Cs -137 not detected
  • Temporal trends of concentration in seawater 330 m east of Discharge point Units 1 to 4
  • Temporal trends of concentrations in seawater at Units 5/6
  • 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
  • Modelling Dispersion of an arbitrary initial discharge
  • Modelling Dispersion of an arbitrary initial discharge
  • Modelling Modelling of the deposition on the sea surface and subsequent concentration