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Investigation on boron and iodine behavior during nuclear glass vapor hydration
npj Materials Degradation ( IF 5.1 ) Pub Date : 2021-03-12 , DOI: 10.1038/s41529-021-00157-6
Haohan Zhang , Tomo Suzuki-Muresan , Yann Morizet , Stéphane Gin , Abdesselam Abdelouas

Understanding the durability of nuclear glass in the vapor phase is essential for evaluating the long-term safety of the nuclear glass. This work studies the vapor hydration of borosilicate and iodine-bearing glass at 90 °C and relative humidity at 99%. Hydration kinetics was monitored by analyzing the boron and iodine released during the vapor hydration process. It is found that boron becomes more easily released after iodine being added to the glass matrix. The results related to boron release and retention indicate the possible transformation of tetrahedral [4]B to trigonal [3]B on the hydrated glass surface, which may enhance the release of boron in the form of boric acid afterward. Release of iodine occurred but at a far lesser extent than boron with 92% of iodine retained in the alteration layer, thus opening good perspectives with regard to the disposal of high-level waste containing iodine.



中文翻译:

核玻璃气相水化过程中硼和碘行为的研究

了解气相中核玻璃的耐用性对于评估核玻璃的长期安全性至关重要。这项工作研究了硼硅酸盐和含碘玻璃在90°C和99%的相对湿度下的水合作用。通过分析在蒸气水合过程中释放的硼和碘来监测水合动力学。发现在将碘添加到玻璃基质中之后,硼变得更容易释放。与硼的释放和保留有关的结果表明,四面体[4] B可能转变为三角形[3]B在水合玻璃表面上,此后可增强硼酸形式的硼的释放。发生了碘的释放,但其程度远小于硼,其中92%的碘保留在蚀变层中,因此就处置含碘高放废物开辟了良好的前景。

更新日期:2021-03-12
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