Effect of nitrogen compounds on transport of ruthenium through the RCS.
Ruthenium is a fission product that can be released from the fuel in case of a severe nuclear accident. In this work the impact of the atmosphere composition, including air radiolysis products, on the transport of ruthenium through a primary circuit was examined. Experiments were performed at temperatures 1300, 1500 and 1700 K in a slightly humid air. In the experiments significant effect of nitrogen oxides (N2O, NO2) and nitric acid on the ruthenium chemistry in the model primary circuit was observed. The obtained results indicate a strong effect of air radiolysis products on the quantity partitioning of transported ruthenium to gaseous and aerosol compounds.
Chalmers University of Technology, 41296 Göteborg, Sweden.
Ivan
0000-0002-1385-8634
I
Kajan
VTT Technical Research Centre of Finland Ltd, 02044 Espoo, Finland.
Teemu
T
Kärkelä
VTT Technical Research Centre of Finland Ltd, 02044 Espoo, Finland.
Ari
A
Auvinen
Chalmers University of Technology, 41296 Göteborg, Sweden.
Christian
C
Ekberg
Air radiolysis; Nuclear accidents; Primary circuit; Ruthenium; Ruthenium tetroxide