Ruthenium transport experiments in air ingress accident conditions

Teemu Kärkelä, Ulrika Backman, Ari Auvinen, Unto Tapper, Jorma Jokiniemi, Riitta Zilliacus, Maija Lipponen, Tommi Kekki

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

In this study the release, transport and speciation of ruthenium in conditions simulating an air ingress accident was studied. Ruthenium dioxide was exposed to oxidising environment at high temperature (1100 -1700 K) in a tubular flow furnace. At these conditions volatile ruthenium species were formed. A large fraction of the released ruthenium was deposited in the tube as RuO2. Depending on the experimental conditions ~1 – 26 wt-% of the released ruthenium was trapped in the outlet filter as RuO2 particles. In stainless steel tube ~0 - 8.8 wt-% of the released ruthenium reached the trapping bottle as gaseous RuO4. A few experiments were carried out, in which revaporisation of ruthenium deposited on the tube walls was studied. In these experiments oxidation of RuO2 took place at a lower temperature. During revaporisation experiments 35 - 65% of ruthenium transported as gaseous RuO4. In order to close mass balance and achieve better time resolution four experiments were carried out using a radioactive tracer.
Original languageEnglish
Title of host publicationThe nuclear renaissance at work : Proceedings of the International Congress on Advances in Nuclear Power Plants, ICAPP 2007
Place of PublicationRed Hook, NY
PublisherCurran Associates Inc.
Pages517-524
Volume1
ISBN (Print)9781604238716
Publication statusPublished - 2007
MoE publication typeA4 Article in a conference publication
EventInternational Congress on Advances in Nuclear Power Plants, ICAPP 2007 - Nice, France
Duration: 13 May 200718 May 2007

Conference

ConferenceInternational Congress on Advances in Nuclear Power Plants, ICAPP 2007
Abbreviated titleICAPP 2007
CountryFrance
CityNice
Period13/05/0718/05/07

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    Kärkelä, T., Backman, U., Auvinen, A., Tapper, U., Jokiniemi, J., Zilliacus, R., Lipponen, M., & Kekki, T. (2007). Ruthenium transport experiments in air ingress accident conditions. In The nuclear renaissance at work : Proceedings of the International Congress on Advances in Nuclear Power Plants, ICAPP 2007 (Vol. 1, pp. 517-524). Curran Associates Inc..