氚老化对钯钇合金膜氢渗透性能的影响

Tritium Aging Effects on Hydrogen Permeation Through Pd-Y Alloy Membrane

在聚变堆燃料循环系统中,钯合金膜将被用于氢同位素与杂质气体间的渗透分离以及含氚杂质中氚的催化回收。长期连续的氚操作将使合金膜体内因氚衰变而累积3He,产生氚老化效应。本工作研究了贮氚老化对Pd8.5Y0.19Ru(原子百分数)合金膜的氕、氘渗透性能的影响。研究结果表明:对于膜内体氦浓度He/M为0.042的氚老化膜,在573～723K温度范围内,氕、氘渗透率被严重降低,膜的氕氘渗透分离系数则有所提高。

Palladium alloy membranes are widely used as permeator to produce pure tritium from impurities and tritride gas mixture in tritium technology related to fusion reactor. But long term continuous operation can lead to accumulation of 3He in alloy, and the results in tritium aging effects. In this work, the changes in protium/deuterium permeation characteristic of Pd8.5Y0.19Ru （at.%） alloy membrane induced by tritium aging were experimentally investigated. The aged membrane has a 3He atomic ratio of 0.042 to metal. The results show that in the temperature range of 573-723 K, the permeability of the aged membrane is decreased seriously, and the permeation separation factor for protium/deuterium is increased somewhat.