Radiolytical oxidation of gaseous iodine by beta radiation

Teemu Kärkelä; Ari Auvinen; Tommi Kekki; Petri Kotiluoto; Jussi Lyyränen; Jorma Jokiniemi

doi:10.1515/ract-2015-2417

Radiolytical oxidation of gaseous iodine by beta radiation

Teemu Kärkelä^*, Ari Auvinen, Tommi Kekki, Petri Kotiluoto, Jussi Lyyränen, Jorma Jokiniemi

^*Corresponding author for this work

University of Eastern Finland

Research output: Contribution to journal › Article › Scientific › peer-review

7 Citations (Scopus)

Abstract

Iodine is one of the most radiotoxic fission product released from fuel during a severe nuclear power plant accident. Within the containment building, iodine compounds can react e.g. on the painted surfaces and form gaseous organic iodides. In this study, it was found out that gaseous methyl iodide (CH₃I) is oxidised when exposed to beta radiation in an oxygen containing atmosphere. As a result, nucleation of aerosol particles takes place and the formation of iodine oxide particles is suggested. These particles are highly hygroscopic. They take up water from the air humidity and iodine oxides dissolve within the droplets. In order to mitigate the possible source term, it is of interest to understand the effect of beta radiation on the speciation of iodine.

Original language	English
Pages (from-to)	719-728
Journal	Radiochimica Acta
Volume	103
Issue number	10
DOIs	https://doi.org/10.1515/ract-2015-2417
Publication status	Published - 1 Jan 2015
MoE publication type	A1 Journal article-refereed

Keywords

aerosol nucleation
beta radiation
Iodine
nuclear safety

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abstract = "Iodine is one of the most radiotoxic fission product released from fuel during a severe nuclear power plant accident. Within the containment building, iodine compounds can react e.g. on the painted surfaces and form gaseous organic iodides. In this study, it was found out that gaseous methyl iodide (CH3I) is oxidised when exposed to beta radiation in an oxygen containing atmosphere. As a result, nucleation of aerosol particles takes place and the formation of iodine oxide particles is suggested. These particles are highly hygroscopic. They take up water from the air humidity and iodine oxides dissolve within the droplets. In order to mitigate the possible source term, it is of interest to understand the effect of beta radiation on the speciation of iodine.",

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AU - Kärkelä, Teemu

AU - Auvinen, Ari

AU - Kekki, Tommi

AU - Kotiluoto, Petri

AU - Lyyränen, Jussi

AU - Jokiniemi, Jorma

N1 - Project code: 101862

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N2 - Iodine is one of the most radiotoxic fission product released from fuel during a severe nuclear power plant accident. Within the containment building, iodine compounds can react e.g. on the painted surfaces and form gaseous organic iodides. In this study, it was found out that gaseous methyl iodide (CH3I) is oxidised when exposed to beta radiation in an oxygen containing atmosphere. As a result, nucleation of aerosol particles takes place and the formation of iodine oxide particles is suggested. These particles are highly hygroscopic. They take up water from the air humidity and iodine oxides dissolve within the droplets. In order to mitigate the possible source term, it is of interest to understand the effect of beta radiation on the speciation of iodine.

AB - Iodine is one of the most radiotoxic fission product released from fuel during a severe nuclear power plant accident. Within the containment building, iodine compounds can react e.g. on the painted surfaces and form gaseous organic iodides. In this study, it was found out that gaseous methyl iodide (CH3I) is oxidised when exposed to beta radiation in an oxygen containing atmosphere. As a result, nucleation of aerosol particles takes place and the formation of iodine oxide particles is suggested. These particles are highly hygroscopic. They take up water from the air humidity and iodine oxides dissolve within the droplets. In order to mitigate the possible source term, it is of interest to understand the effect of beta radiation on the speciation of iodine.

KW - aerosol nucleation

KW - beta radiation

KW - Iodine

KW - nuclear safety

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Radiolytical oxidation of gaseous iodine by beta radiation

Abstract

Keywords

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