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Effect of nitrogen compounds on transport of ruthenium through the RCS

Ivan Kajan (Institutionen för kemi och kemiteknik, Kärnkemi) ; T. Karkela ; A. Auvinen ; Christian Ekberg (Institutionen för kemi och kemiteknik, Industriell materialåtervinning ; Institutionen för kemi och kemiteknik, Kärnkemi)
Journal of Radioanalytical and Nuclear Chemistry (0236-5731). Vol. 311 (2017), 3, p. 2097-2109.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Ruthenium, Ruthenium tetroxide, Nuclear accidents, Primary circuit, Air radiolysis, nuclear-power-plant, phebus-fp, thermal decomposition, primary circuit, severe accident, surfaces, containment, deposition, release, oxides, Chemistry, Nuclear Science & Technology

Denna post skapades 2017-05-03. Senast ändrad 2017-06-30.
CPL Pubid: 249094


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