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A probabilistic dispersion model applied to the long-range transport of radionuclides from the Chernobyl accident



A probabilistic dispersion model applied to the long-range transport of radionuclides from the Chernobyl accident



Atmospheric Environment 33(20): 3271-3279



Long-range atmospheric transport of radionuclides from the Chernobyl accident is modelled as an Eulerian diffusion process. From observations of the gross deposition pattern of particulate radiocaesium an effective long-range Eddy diffusivity K of the order of 106 m2 s-1 is inferred. A corresponding effective deposition length for caesium, RCs, defined as the effective distance from Chernobyl to where the aerosols have been deposited, is found to be RCs apprxeq 1000 km. From the observations of the regional variability of the Chernobyl fallout a simple probabilistic assessment method is proposed for the long-range radiological consequences of nuclear accidents.

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Accession: 010088807

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DOI: 10.1016/s1352-2310(99)00108-9


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