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核技术  2015 

氘氚燃料气体氕纯化系统设计及工艺初探

DOI: 10.11889/j.0253-3219.2015.hjs.38.050603, PP. 50603-50603

Keywords: 氢同位素分离,循环吸附,氕浓缩,钯/硅藻土

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Abstract:

在惯性约束聚变氘氚冷冻靶制备中,对氘氚原料气中氕含量有严格限制。为控制少量燃料中氕含量,有必要开展相关氢同位素分离研究及工程研制。根据热循环吸附(ThermalCyclingAbsorptionProcess,TCAP)原理及前期冷实验数据,研制了一套小型纯化热实验系统。系统内配置了一根长2m、外径6.4mm的钯/硅藻土填充柱用于对氕的过滤。按照纯化工艺设计,占总吸附量10%的原料气从填充柱一端输入,经过一次加热冷却循环后从柱另一端输出,氕在色谱柱内累积,进而实现原料气的纯化。经过纯化工艺初步探索,连续输入33次原料气后,柱内氕含量由12%累积到了52%,产品气中氕含量由12%降至3%,氘氚燃料回收率为82.5%,实现了柱内氕的有效富集,以及氘氚气体中氕的有效过滤。

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