核安全2024，Vol.23Issue(5)：57-63,7.
表面状态对钇热阱除氢效率的影响研究
Study on the Effect of Different Surface States on the Hydrogen Removal Efficiency of Yttrium Hot Traps
摘要
Abstract
The removal of impurity hydrogen or hydrogen isotopes from liquid lithium metal is usually realized by using hot-trap adsorption,and yttrium metal,as a sorbent material,has a crucial influence of its surface oxide film on the hydrogen removal efficiency.In this paper,for the hydrogen hot-trap sorbent material yttrium metal,a one-dimensional plate diffusion model based on Fick's law was established,the hydrogen concentration distribution with time on the radial direction of yttrium metal plate was preliminarily obtained,and experiments were carried out to test the influence of different surface states on the hydrogen removal performance of yttrium metal.The results show that when there is no oxide layer on the surface of yttrium metal,the hydrogen concentration in the container can be reduced to half of the initial concentration within a short period of time;under the condition of yttrium metal with an oxide layer on the surface at room temperature or without high-temperature activation,the hydrogen absorption capacity is extremely weak,and the Y2O3 layer will hinder the dissociation of hydrogen molecules on the surface of yttrium metal,thus completely preventing the hydrogen from further diffusing into the interior of the crystals.When the temperature rises above 450 K,the hydrogen absorption capacity of yttrium metal with an oxidized layer on the surface can be reactivated to a certain extent.关键词
热阱/杂质去除/氧化膜/高温激活Key words
hot trap/impurity removal/oxide film/High temperature activation分类
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阿不都赛米·亚库甫,姚泽文,王荣东,朴君,王洋..表面状态对钇热阱除氢效率的影响研究[J].核安全,2024,23(5):57-63,7.基金项目
中国原子能科学研究院反应堆工程技术研究所所长基金科研项目(218241) （218241）
