Radiolytical oxidation of gaseous iodine by beta radiation

Teemu Kärkelä (Corresponding Author), Ari Auvinen, Tommi Kekki, Petri Kotiluoto, Jussi Lyyränen, Jorma Jokiniemi

Research output: Contribution to journalArticleScientificpeer-review

5 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 languageEnglish
Pages (from-to)719-728
Number of pages10
JournalRadiochimica Acta
Volume103
Issue number10
DOIs
Publication statusPublished - 1 Jan 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

Iodine
iodine
Radiation
Oxidation
oxidation
radiation
Oxides
iodides
Iodine Compounds
iodine compounds
containment
oxides
fission products
Fission products
nuclear power plants
Iodides
accidents
Aerosols
Nuclear power plants
humidity

Keywords

  • aerosol nucleation
  • beta radiation
  • Iodine
  • nuclear safety

Cite this

Kärkelä, Teemu ; Auvinen, Ari ; Kekki, Tommi ; Kotiluoto, Petri ; Lyyränen, Jussi ; Jokiniemi, Jorma. / Radiolytical oxidation of gaseous iodine by beta radiation. In: Radiochimica Acta. 2015 ; Vol. 103, No. 10. pp. 719-728.
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Radiolytical oxidation of gaseous iodine by beta radiation. / Kärkelä, Teemu (Corresponding Author); Auvinen, Ari; Kekki, Tommi; Kotiluoto, Petri; Lyyränen, Jussi; Jokiniemi, Jorma.

In: Radiochimica Acta, Vol. 103, No. 10, 01.01.2015, p. 719-728.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Auvinen, Ari

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AU - Jokiniemi, Jorma

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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.

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