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Source of Iodine-131 in Europe Identified (IAEA, November 17 2011, edited)

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  • Source of Iodine-131 in Europe Identified (IAEA, November 17 2011, edited)

    [Source: International Nuclear Energy Agency, full page: (LINK). Edited.]

    Press Release 2011/27

    Source of Iodine-131 in Europe Identified

    17 November 2011

    The IAEA has received information from the Hungarian Atomic Energy Authority (HAEA) that the source of the iodine-131 (I-131) detected in Europe was most probably a release to the atmosphere from the Institute of Isotopes Ltd., Budapest.

    The Institute of Isotopes Ltd. produces radioisotopes for healthcare, research and industrial applications. According to the HAEA, the release occurred from September 8 to November 16, 2011. The cause of the release is under investigation.

    As previously mentioned, the levels of I-131 that have been detected in Europe are extremely low.

    There is no health concern to the population. If any member of the public were to breathe iodine for a whole year at the levels measured in European countries, then they would receive a dose in the range of 0.01 microsieverts for the year.

    To put this into perspective, the average annual background is 2400 microsieverts per year.

    The IAEA was first notified of the presence of trace levels of I-131 by authorities from the Czech Republic on 11 November.

    Since this notification, the IAEA contacted several member
    states throughout the region to determine the cause and origin. The IAEA also worked with the World Meteorological Organization (WMO) to conduct air dispersion modelling, as part of efforts to determine the source.


    IAEA Press Release 2011/24

    The International Atomic Energy Agency (IAEA) serves as the world's foremost intergovernmental forum for scientific and technical co-operation in the peaceful use of nuclear technology. Established as an autonomous organization under the United Nations (UN) in 1957, the IAEA carries out programmes to maximize the useful contribution of nuclear technology to society while verifying its peaceful use.

    NOTE TO EDITORS: For additional information visit the Press Section of the IAEA's website (, or call the IAEA's Division of Public Information at (431) 2600-21270.
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