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Monday, September 5, 2011

Simulation Map of Cesium-137 Deposition Across the Pacific by CEREA Shows Contamination in US Greater Than That of Western Japan


Ex-Skf
September 1, 2011
France’s CEREA has the simulation map of ground deposition of cesium-137 from the Fukushima I Nuclear Power Plant accident on its “Fukushima” page.

It not only shows Japan but also the entire northern Pacific Rim, from Russian Siberia to Alaska to the West Coast of the US to the entire US.
According to the map, the US, particularly the West Coast and particularly California, may be more contaminated with radioactive cesium than the western half of Japan or Hokkaido.
It looks more contaminated than South Korea or China. Canada doesn’t look too well either, particularly along the border with US on the western half.
From CEREA’s Fukushima page:
Atmospheric dispersion of radionuclides from the Fukushima-Daichii nuclear power plant
CEREA, joint laboratory École des Ponts ParisTech and EdF R&D
Victor Winiarek, Marc Bocquet, Yelva Roustan, Camille Birman, Pierre Tran
Map of ground deposition of caesium-137 for the Fukushima-Daichii accident.
The simulation was performed with a specific version of the numerical atmospheric chemistry and transport model Polyphemus/Polair3D. The parametrisations used for the transport and physical removal of the radionuclides are described in [1,2,3,4].
The magnitude of the deposition field is uncertain and the simulated values of deposited radionuclides could be significantly different from the actual deposition. In particular, the source term remains uncertain. Therefore, these results should be seen as preliminary and they are likely to be revised as new information become available to better constrain the source term and when radionuclides data can be used to evaluate the model simulation results. Read the rest on: 
·The Intel Hub ·


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