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 journalScientific

Abstract

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
Volume103
Publication statusPublished - 2010
MoE publication typeB3 Non-refereed article in conference proceedings

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Iodine
Chemical reactions
Networks (circuits)
Iodine compounds
Cesium iodide
Fission products
Molybdenum
Aerosols
Boron
Accidents
Experiments

Cite this

Kalilainen, Jarmo ; Kärkelä, Teemu ; Zilliacus, Riitta ; Auvinen, Ari. / The Effect of Chemical Reactions on Primary Circuit Surfaces on Iodine. In: Transactions of the American Nuclear Society. 2010 ; Vol. 103. pp. 449-450.
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The Effect of Chemical Reactions on Primary Circuit Surfaces on Iodine. / Kalilainen, Jarmo; Kärkelä, Teemu; Zilliacus, Riitta; Auvinen, Ari.

In: Transactions of the American Nuclear Society, Vol. 103, 2010, p. 449-450.

Research output: Contribution to journalArticle in a proceedings journalScientific

TY - JOUR

T1 - The Effect of Chemical Reactions on Primary Circuit Surfaces on Iodine

AU - Kalilainen, Jarmo

AU - Kärkelä, Teemu

AU - Zilliacus, Riitta

AU - Auvinen, Ari

PY - 2010

Y1 - 2010

N2 - 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.)

AB - 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.)

M3 - Article in a proceedings journal

VL - 103

SP - 449

EP - 450

JO - Transactions of the American Nuclear Society

JF - Transactions of the American Nuclear Society

SN - 0003-018X

ER -