EXPEXPERIMENTAL ANALYSIS OF POWDER RESUSPENSION FACTORS IN CASE OF HEDD ATTACK

For the analysis of radiological consequences of accidental consequences on transport or storage packages of nuclear material, source term data are required. These are the amount and the size distribution of aerosol-borne radioactivity created, as well as the shape of the dust cloud released. Important parameters controlling the amount of released material are the size and geometry of the package and the inventory as well as the material properties of the radioactive inventory. Material re-suspension factors upon high energy impact on brittle material is quite well understood based on data obtained in a large number of small and large scale experiments. However, less knowledge is available concerning the re-suspension behaviour of powder materials interacting with an HEDD for instance. The intention of the paper is to provide an experimental basis for the derivation of re-suspension factor values for powder and thus to reduce the level of uncertainty in source term derivation. The project aims at improving the understanding of the relevant processes and on the material properties affecting the re-suspension of powder in case of a HEDD impact.