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Activity Name ATR: Impact of Aerosols on the Transport of Ruthenium in the primary circuit of nuclear power plant
Project Summary

The proposed work is a continuation of previous experiments on the release and transport of
ruthenium. The experiments have been carried out at VTT Technical Research Centre of
Finland and at Chalmers University of Technology. At VTT it was observed that the fraction of
gaseous Ru transported through the circuit was significantly higher than expected by
thermodynamic equilibrium calculations. Also, previous studies have shown that gaseous
RuO4 reacts readily with different surfaces. Behaviour of ruthenium tetroxide and iodine
species was investigated at Chalmers previously. A significant chemical interaction between
ruthenium and iodine was observed, leading both to release of gaseous iodine and increased
trapping of ruthenium on the surfaces. The proposed activity merges these individual research
projects to create added value.

Leader Organisation VTT Technical Research Centre of Finland
Contact Person

Ari Auvinen

phone number: +35 820 722 57 85

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