30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA...
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![Page 1: 30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment](https://reader035.fdocuments.us/reader035/viewer/2022062707/5583a7a2d8b42af5058b4753/html5/thumbnails/1.jpg)
IAEAInternational Atomic Energy Agency
Marine Environment
-Fukushima NPPs Potential Impact on
the Marine Environment –
Assessment of IAEA Environmental Laboratories on Data provided by
Japan
IAEA-Environmental Laboratories, Monaco
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IAEA
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
![Page 3: 30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment](https://reader035.fdocuments.us/reader035/viewer/2022062707/5583a7a2d8b42af5058b4753/html5/thumbnails/3.jpg)
IAEA
Temporal trend on concentrationsData submitted by Japanese authorities
Cs-137
![Page 4: 30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment](https://reader035.fdocuments.us/reader035/viewer/2022062707/5583a7a2d8b42af5058b4753/html5/thumbnails/4.jpg)
IAEA
Temporal trend on concentrationsData submitted by Japanese authorities
I-131
![Page 5: 30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment](https://reader035.fdocuments.us/reader035/viewer/2022062707/5583a7a2d8b42af5058b4753/html5/thumbnails/5.jpg)
IAEA
1 103 104 105 106102101 107 108
April 200530 km
Bq.m-3
[1 – 101]
1 103 104 105 106102101 107 108
24, 25 March 2011
Bq.m-3
[103– 104]
[105– 107]
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
![Page 6: 30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment](https://reader035.fdocuments.us/reader035/viewer/2022062707/5583a7a2d8b42af5058b4753/html5/thumbnails/6.jpg)
Cs-137 Bq.m-3
Monitoring of the Marine environment seawater concentration 1. 30 km :
• 28 march, Concentrations increase at station 5
• Spatial distribution is more heterogeneous
2. 20 km :• New station since 28 of march #9
3. 300 m : • Concentrations increase 2 orders of
magnitude since 28 March
TEPCO
MEXT
28 march, depth 132 m : Cs -137 not detected
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IAEA
Temporal trends of concentration in seawater 330 m east of Discharge point
Units 1 to 4
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IAEA
Temporal trends of concentrations in seawater at Units 5/6
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IAEA
Modelling
Dispersion of an arbitrary initial discharge
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
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
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IAEA
Modelling
Dispersion of an arbitrary initial discharge
Dispersion of an arbitrary initial discharge
![Page 11: 30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment](https://reader035.fdocuments.us/reader035/viewer/2022062707/5583a7a2d8b42af5058b4753/html5/thumbnails/11.jpg)
IAEA
Modelling
Dispersion of an arbitrary initial discharge
Dispersion of an arbitrary initial discharge
![Page 12: 30 March 2011 Fukushima Nuclear Power Plant's Potential Impact on the Marine Environment - IAEA Environmental Lab Assessment](https://reader035.fdocuments.us/reader035/viewer/2022062707/5583a7a2d8b42af5058b4753/html5/thumbnails/12.jpg)
IAEA
Modelling
Modelling of the deposition on the sea surface and subsequent concentration
Modelling of the deposition on the sea surface and subsequent concentration