Abstract
This work presents laboratory tests on gaseous RuO4 filtration carried out at IRSN in Cadarache. The objective is to determine if gaseous ruthenium tetroxide can be trapped by metallic filter and sand bed filter, both elements being used in filtered containment venting systems implemented on French pressurized water reactors. The results show no ruthenium tetroxide trapping by physical or chemical adsorption but certain retention is observed resulting from its thermal decomposition into solid ruthenium dioxide. A thermodynamic analysis of the system tends to confirm this conclusion. Chemical stability of RuO4(g) has to be considered as it strongly impacts potential filtration and so potential releases.
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Acknowledgements
This work was performed in the frame of the French research program ANR-11-RSNR-0013-01 called MiRE (Mitigation of outside releases in case of nuclear accident), with the financial support of EDF and Framatome.
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Nerisson, P., Hu, H., Paul, J.F. et al. Filtration tests of gaseous ruthenium tetroxide by sand bed and metallic filters. J Radioanal Nucl Chem 321, 591–598 (2019). https://doi.org/10.1007/s10967-019-06612-8
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DOI: https://doi.org/10.1007/s10967-019-06612-8