Ruthenium transport in an RCS with airborne CsI

Teemu Kärkelä, Ivan Kajan, Unto Tapper, Ari Auvinen, Christian Ekberg

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)


Ruthenium is one of the most radiotoxic fission products which can be released from fuel as ruthenium oxides in an air ingress accident at a nuclear power plant. In this study it was found that the transport of the released ruthenium oxides through a reactor coolant system into the containment building is significantly affected by the atmospheric conditions. Airborne CsI increased the transport of gaseous ruthenium compared with that in a pure air atmosphere. The overall transport of ruthenium increased with temperature. In order to understand the behaviour of ruthenium in accident conditions, it is important to widen the experimental conditions from pure air/steam atmospheres to more realistic mixtures of prototypic gases and aerosols.
Original languageEnglish
Pages (from-to)38-48
Number of pages11
JournalProgress in Nuclear Energy
Publication statusPublished - 1 Aug 2017
MoE publication typeA1 Journal article-refereed


  • ruthenium
  • caesium iodide
  • aerosol
  • severe accident
  • source term

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