Experimental modeling of wind-driven bin-by-bin resuspension factors of freshly fallen radionuclides after an energetic release from a radiological dispersal device
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Small-scale experiments were carried out to characterize the resuspension factor of radioactive lanthanum oxide powder in an environmentally controlled wind tunnel, with the majority using particle sizes less than 10μm in order to assess the impact of wind resuspension stresses and surface roughness conditions on resuspension. Operational principles of the measuring devices used in the radionuclide resuspension experiments and corresponding uncertainties are discussed. The average bin-by-bin particle resuspension factors (ki) for particle sizes, in the range of 0.25–7.00μm and 7.00–12.5μm for downwind fallout locations, were calculated and are reported here as 1.14×10−31/m and 4.39×10−21/m, respectively.