Interaction of ruthenium tetroxide with iodine-covered surfaces of materials in nuclear reactor containment building
Interaction of ruthenium tetroxide with iodine-covered surfaces of materials in nuclear reactor containment building
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DOI：
10.1080/00223131.2016.1174627
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发表时间：
2016-04
影响因子：
1.2
通讯作者：
I. Kajan;S. Tietze;C. Ekberg
中科院分区：
文献类型：
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作者：
I. Kajan;S. Tietze;C. Ekberg
在严重核事故中，燃料中可能会释放出挥发性碘和钌。预计碘和钌都将存款在核电站安全壳建筑的表面上。据推测，由于燃料的释放时间不同，钌将在表面已经沉积有碘物质时到达安全壳。本文研究了四氧化钌对核电站安全壳中元素碘覆盖表面的影响。在高湿度条件下，四氧化钌氧化锌、铝、铜和环氧涂料上的碘沉积物的能力进行了评价。碘和钌沉积物的定量是通过伽马能谱进行的。用SEM、XPS和EDX技术对沉积元素的化学形态进行了观察。实验表明，四氧化钌氧化碘在锌和铝样品上沉积成碘的挥发性形式，在铜和环氧涂料样品上沉积成更高的碘氧化物。观察到与清洁表面相比，碘暴露表面上的钌吸收量大幅增加。
ABSTRACT Volatile iodine and ruthenium species are likely to be released from the fuel during a severe nuclear accident. Both iodine and ruthenium are expected to deposit on the surfaces in the containment building of the nuclear power plant. It is assumed that, due to the different release times from the fuel, ruthenium will reach the containment at the time when surfaces are already deposited with iodine species. The influence of ruthenium tetroxide on elemental iodine-covered surfaces in the containment of nuclear power plants was studied in this work. The ability of ruthenium tetroxide to oxidize iodine deposits on zinc, aluminum, copper and epoxy paint at high humidity conditions was evaluated. Quantification of both iodine and ruthenium deposits was done by the means of gamma spectroscopy. The chemical speciation of deposited elements was observed with SEM, XPS and EDX techniques. Experiments showed that ruthenium tetroxide oxidized iodine deposits into the volatile forms of iodine on zinc and aluminum samples and higher iodine oxides in the case of copper and epoxy paint samples. A major increase of ruthenium uptake on iodine-exposed surfaces in comparison to clean surfaces was observed.