Release of Radioactive Materials from a Degrading Core (RADECO): RADECO summary report

Tommi Kekki, Riitta Zilliacus, Maija Lipponen

    Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

    Abstract

    The deposition of IOx particles on painted concrete samples and the study on iodine desorption from IOx particle deposition was a joint effort between RADECO and CHEMPC projects. The experiments with iodine oxide deposition on painted concrete, showed some release of gaseous iodine. The desorption of iodine was enhanced on newly painted surface. According to these experiments the formation of the organic iodine is very limited. However, some migration of iodine on the surfaces may be possible by sequential revolatilization and re-trapping. Further experiments would be needed at higher temperature, at high humidity and with different representative surfaces such as metals, paints and cable jacket materials. Nitric acid is a principal radiolytic compound produced in large, and its production is another important problem concerning pH of solutions, owing to its chemical properties of being a strong acid and a strong oxidizing agent. The G value was determined for nitric acid formed from air and for the nitric acid formed from the water. G-value calculated of these moist air results is 2.42 parallel experiments gave G-value 2.32. The determination of G-value for NO3 formation of water in radiation gave G-value 0.024. A preliminary experiment to study the influence of painted surface in the nitrate concentration was made by irradiating water with and without painted concrete block. The preliminary results with the 2.6 kGy dose gave 4 times more nitrate into the water than in blank case.
    Original languageEnglish
    Title of host publicationSAFIR2010
    Subtitle of host publicationThe Finnish Research Programme on Safety 2007-2010: Final Report
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages295-300
    ISBN (Electronic)978-951-38-7690-6
    ISBN (Print)978-951-38-7689-0
    Publication statusPublished - 2011
    MoE publication typeNot Eligible

    Publication series

    SeriesVTT Tiedotteita - Research Notes
    Number2571
    ISSN1235-0605

    Fingerprint

    iodine
    nitric acid
    experiment
    desorption
    nitrate
    water
    air
    cable
    trapping
    material
    chemical property
    humidity
    oxide
    acid
    metal

    Cite this

    Kekki, T., Zilliacus, R., & Lipponen, M. (2011). Release of Radioactive Materials from a Degrading Core (RADECO): RADECO summary report. In SAFIR2010: The Finnish Research Programme on Safety 2007-2010: Final Report (pp. 295-300). Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Research Notes, No. 2571
    Kekki, Tommi ; Zilliacus, Riitta ; Lipponen, Maija. / Release of Radioactive Materials from a Degrading Core (RADECO) : RADECO summary report. SAFIR2010: The Finnish Research Programme on Safety 2007-2010: Final Report. Espoo : VTT Technical Research Centre of Finland, 2011. pp. 295-300 (VTT Tiedotteita - Research Notes; No. 2571).
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    abstract = "The deposition of IOx particles on painted concrete samples and the study on iodine desorption from IOx particle deposition was a joint effort between RADECO and CHEMPC projects. The experiments with iodine oxide deposition on painted concrete, showed some release of gaseous iodine. The desorption of iodine was enhanced on newly painted surface. According to these experiments the formation of the organic iodine is very limited. However, some migration of iodine on the surfaces may be possible by sequential revolatilization and re-trapping. Further experiments would be needed at higher temperature, at high humidity and with different representative surfaces such as metals, paints and cable jacket materials. Nitric acid is a principal radiolytic compound produced in large, and its production is another important problem concerning pH of solutions, owing to its chemical properties of being a strong acid and a strong oxidizing agent. The G value was determined for nitric acid formed from air and for the nitric acid formed from the water. G-value calculated of these moist air results is 2.42 parallel experiments gave G-value 2.32. The determination of G-value for NO3 formation of water in radiation gave G-value 0.024. A preliminary experiment to study the influence of painted surface in the nitrate concentration was made by irradiating water with and without painted concrete block. The preliminary results with the 2.6 kGy dose gave 4 times more nitrate into the water than in blank case.",
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    series = "VTT Tiedotteita - Research Notes",
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    Kekki, T, Zilliacus, R & Lipponen, M 2011, Release of Radioactive Materials from a Degrading Core (RADECO): RADECO summary report. in SAFIR2010: The Finnish Research Programme on Safety 2007-2010: Final Report. VTT Technical Research Centre of Finland, Espoo, VTT Tiedotteita - Research Notes, no. 2571, pp. 295-300.

    Release of Radioactive Materials from a Degrading Core (RADECO) : RADECO summary report. / Kekki, Tommi; Zilliacus, Riitta; Lipponen, Maija.

    SAFIR2010: The Finnish Research Programme on Safety 2007-2010: Final Report. Espoo : VTT Technical Research Centre of Finland, 2011. p. 295-300 (VTT Tiedotteita - Research Notes; No. 2571).

    Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

    TY - CHAP

    T1 - Release of Radioactive Materials from a Degrading Core (RADECO)

    T2 - RADECO summary report

    AU - Kekki, Tommi

    AU - Zilliacus, Riitta

    AU - Lipponen, Maija

    PY - 2011

    Y1 - 2011

    N2 - The deposition of IOx particles on painted concrete samples and the study on iodine desorption from IOx particle deposition was a joint effort between RADECO and CHEMPC projects. The experiments with iodine oxide deposition on painted concrete, showed some release of gaseous iodine. The desorption of iodine was enhanced on newly painted surface. According to these experiments the formation of the organic iodine is very limited. However, some migration of iodine on the surfaces may be possible by sequential revolatilization and re-trapping. Further experiments would be needed at higher temperature, at high humidity and with different representative surfaces such as metals, paints and cable jacket materials. Nitric acid is a principal radiolytic compound produced in large, and its production is another important problem concerning pH of solutions, owing to its chemical properties of being a strong acid and a strong oxidizing agent. The G value was determined for nitric acid formed from air and for the nitric acid formed from the water. G-value calculated of these moist air results is 2.42 parallel experiments gave G-value 2.32. The determination of G-value for NO3 formation of water in radiation gave G-value 0.024. A preliminary experiment to study the influence of painted surface in the nitrate concentration was made by irradiating water with and without painted concrete block. The preliminary results with the 2.6 kGy dose gave 4 times more nitrate into the water than in blank case.

    AB - The deposition of IOx particles on painted concrete samples and the study on iodine desorption from IOx particle deposition was a joint effort between RADECO and CHEMPC projects. The experiments with iodine oxide deposition on painted concrete, showed some release of gaseous iodine. The desorption of iodine was enhanced on newly painted surface. According to these experiments the formation of the organic iodine is very limited. However, some migration of iodine on the surfaces may be possible by sequential revolatilization and re-trapping. Further experiments would be needed at higher temperature, at high humidity and with different representative surfaces such as metals, paints and cable jacket materials. Nitric acid is a principal radiolytic compound produced in large, and its production is another important problem concerning pH of solutions, owing to its chemical properties of being a strong acid and a strong oxidizing agent. The G value was determined for nitric acid formed from air and for the nitric acid formed from the water. G-value calculated of these moist air results is 2.42 parallel experiments gave G-value 2.32. The determination of G-value for NO3 formation of water in radiation gave G-value 0.024. A preliminary experiment to study the influence of painted surface in the nitrate concentration was made by irradiating water with and without painted concrete block. The preliminary results with the 2.6 kGy dose gave 4 times more nitrate into the water than in blank case.

    M3 - Chapter or book article

    SN - 978-951-38-7689-0

    T3 - VTT Tiedotteita - Research Notes

    SP - 295

    EP - 300

    BT - SAFIR2010

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Kekki T, Zilliacus R, Lipponen M. Release of Radioactive Materials from a Degrading Core (RADECO): RADECO summary report. In SAFIR2010: The Finnish Research Programme on Safety 2007-2010: Final Report. Espoo: VTT Technical Research Centre of Finland. 2011. p. 295-300. (VTT Tiedotteita - Research Notes; No. 2571).