The Effect of Chemical Reactions on Primary Circuit Surfaces on Iodine

Jarmo Kalilainen, Teemu Kärkelä, Riitta Zilliacus, Ari Auvinen

    Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review


    The aim of this work was to investigate the transport of fission products inside the primary circuit in severe accident conditions. An unexpected result from Phebus FTP-3 experiment was that only a very small fraction of iodine was transported as aerosol in the circuit. Approximately 85% of the iodine released in the containment was in gaseous form. None of the calculations made in advance had predicted such high gaseous iodine fraction. This indicated that integral codes used for pre-calculations did not include all relevant phenomena such as reactions on primary circuit surfaces. In these experiments, cesium iodide was used as precursor material for iodine compounds. Also, effects of molybdenum and boron on transport of iodine were investigated. (1 refs.)
    Original languageEnglish
    Pages (from-to)449-450
    JournalTransactions of the American Nuclear Society
    Publication statusPublished - 2010
    MoE publication typeA4 Article in a conference publication


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