中文摘要：

低放废液在放射性废液里占有很大的比例,我国制定了严格的排放标准,尤其是对内陆核电站,需要选择更高效的处理技术,有必要研究膜蒸馏处理低放废液后的净化效果。基于气隙式膜蒸馏装置研究对模拟低放废水中微量的Sr^2＋和Cs^＋的净化效果,以及温差和流速对净化效果的影响,对某乏燃料后处理厂里的低放废液进行处理。结果表明：膜蒸馏装置对微量的Sr^2＋和Cs^＋平均截留率均大于99.99%,去污因子可以达到104量级以上;流速和温差对膜蒸馏装置的净化效果基本没有影响;对没有进行任何预处理后处理厂的低放废液,膜蒸馏装置连续处理4天多,处理后的馏出液的平均总α活度浓度为0.04Bq/L,平均总β活度浓度为15.13Bq/L,远低于该厂的排放标准。

英文摘要：

Low level radioactive waste liquid occupies a large proportion of radioactive waste.China has formulated strict emission standards,especially for inland nuclear power plant,which need to choose more efficient processing technology,it is necessary to study the purification effect of treatment of low level radioactive waste liquid by membrane distillation.Research on the purification effect of treatment of trace Sr^2＋and Cs^＋in simulating low level radioactive waste liquid by air gap membrane distillation,and the effect of the temperature difference and flow rate on the purifying effect,the low level radioactive waste liquid in spent fuel reprocessing plant were treated.Research shows that：the average retention rates of trace Sr^2＋and Cs^＋by membrane distillation are greater than 99.99%,which the decontamination factor can reach more than 104 orders of magnitude;the temperature difference and flow rate have no effect on the purifying effect of membrane distillation;membrane distillation processes the low level waste liquid without any pretreatment,in more 4days theaverage total alpha activity concentration of the distilled liquid is 0.04Bq/L,the average total beta activity concentration is 15.13Bq/L,far below the discharge standard of the spent fuel reprocessing plant.