Effect of hydrophobic paints coating for tritium reduction in concrete materials
Effect of hydrophobic paints coating for tritium reduction in concrete materials
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DOI：
10.1016/j.fusengdes.2012.02.058
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发表时间：
2012-08
影响因子：
1.7
通讯作者：
Y. Edao;S. Fukada;Y. Nishimura;K. Katayama;T. Takeishi;Y. Hatano;A. Taguchi
中科院分区：
文献类型：
--
作者：
Y. Edao;S. Fukada;Y. Nishimura;K. Katayama;T. Takeishi;Y. Hatano;A. Taguchi
研究了水泥浆体表面涂敷憎水性涂料对氚迁移的影响。水泥浆体表面涂有丙烯酸硅树脂漆和环氧树脂漆两种涂料。我们研究了氚化水蒸气暴露的样品中捕获的氚的量通过吸附和释放。结果表明，在氚水蒸气暴露50天的过程中，两种疏水涂料都能有效地降低氚的渗透。环氧涂料对氚的还原效果高于硅，但由于结构的差异，环氧涂料对氚的捕获量大于硅。通过对扩散模型的分析，确定了氚在涂有涂料的水泥浆体中迁移的速率控制步骤是通过涂料的扩散。结果表明，由于硅中存在较多的孔隙，氚更容易渗透到硅中。在从环氧涂料释放氚的情况下，可以认为由于同位素交换反应对环氧涂料中所含的水的阻滞，氚在环氧树脂中的扩散缓慢。
The effects of hydrophobic paint coating on a concrete material of cement paste on the tritium transport are investigated. The cement paste is coated with two kinds of paints, acrylic-silicon resin paint and epoxy resin paint. We investigated the amount of tritium trapped in the samples exposed to tritiated water vapor by means of sorption and release. It was found that both the hydrophobic paints could reduce effectively tritium permeation during 50 days exposure of tritiated water vapor. The effect of tritium reduction of the epoxy paint was higher than that of silicon while the amount of tritium trapped in the epoxy paint was larger than that of silicon due to difference of the structure. Based on an analysis of a diffusion model, the rate-determining step of tritium migration through cement paste coated with the paints is diffusion through the paints respectively. It was found that tritium was easy to penetrate through silicon because there were many pores or voids in the silicon comparatively. In the case of tritium released from the epoxy paint, it is considered that tritium diffusion in epoxy is slow due to retardation by isotope exchange reaction to water included in epoxy paint.