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Modelling Fukushima emissions and fallout

I’ve been reading with great interest a recently released approximation of the quantity and deposition of radionuclides from the Fukushima Dai-ichi nuclear power plant accident earlier this year. Recently published on the Atmospheric Chemistry and Physics open discussion forum, the PDF form (entitled “Xenon-133 and caesium-137 releases into the atmosphere from the Fukushima Dai-ichi nuclear power plant: determination of the source term, atmospheric dispersion, and deposition”) is freely available.

The discussion paper raises a number of interesting points, particularly the indications of pre-tsunami reactor containment failure as evidenced by radioxenon releases, the large contribution to overall emissions from the spent fuel pool fire (reactor building #4) and the upward rating on the overall estimated radionuclide emissions. I strongly recommend a read.

Photo credit: TEPCO

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