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| Home > Publications database > Experimental investigation on the depletion behavior of multi-component aerosols |
| Abstract | FZJ-2023-05742 |
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2023
Abstract: In the course of a severe accident, fission products from the damaged core can be released into the containment in the form of aerosols. These aerosols are radioactive and can be transported anywhere, which increases the operational safety risk. In the worst scenario, in the event of containment failure, these aerosols are released into the surrounding environment, posing a serious threat to human health. Consequently, developing a comprehensive and deep insight into the aerosol depletion behavior in a severe accident is essential to improve the prediction ability of accident progression and to contribute to the severe accident management.Various experimental test series on nuclear aerosol depletion behavior have been carried out in the IN-EX facility at the Forschungszentrum Jülich, Germany. Since comprehensive investigations on the depletion behavior of single-species and two-component aerosols have been performed recently and in the past, complementary test series with multi-component aerosols are of great interest. Consequently, based on the results of the PHÉBUS FPT3 test, a mixture of CsI/Cs2MoO4/SnO2/Ag was applied in our experiments. Where CsI and Cs2MoO4 are taken as representative soluble aerosols, while SnO2 and Ag are considered as representative insoluble aerosols. In this work, we measured the size distribution to obtain an overview of the depletion behavior of multi-component aerosols, and derived experimental aerosol removal rates to evaluate it. Moreover, we verified the experimental results of two-component aerosols with various mass ratios between soluble and insoluble aerosols, as a comparison unit to assess the results of four-component aerosols.KEYWORDS
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