高放废液中^(137)Cs的萃取去除

Extraction of^(137)Cs From High Level Liquid Waste

高放废液的处理处置是影响核能可持续发展的重要因素之一。从高放废液中萃取分离高释热放射性核素^(137)Cs不仅有利于实现高放废液的安全处置,也可满足^(137)Cs在诸多工业领域的应用需求。研究提出了以杯芳烃冠醚衍生物为萃取剂从高放废液中萃取分离Cs的工艺流程,并分别采用模拟和真实高放废液对流程进行了验证实验。结果表明,模拟高放废液实验中Cs(Ⅰ)的萃取率达到99.9%,热实验中^(137)Cs的萃取率达到99.95%。该工作所提出的工艺流程为进一步开展我国动力堆高放废液处理及^(137)Cs分离提取提供了参考数据。

The treatment and disposal of high level liquid waste(HLLW)is an important factor affecting the sustainable development of nuclear energy.The extraction separation of high-heat-release nuclide^(137)Cs from HLLW is not only beneficial to the safe disposal of HLLW,but also meeting the needs of^(137)Cs in many industry fields.In this work,the extraction process for^(137)Cs from HLLW was proposed with calixcrown as extractant.The process was tested with simulated and real HLLW with a recovery percentage of 99.9%for Cs(Ⅰ)and 99.95%for^(137)Cs,respectively.The results show that the proposed process for Sr extraction has a bright future in the treatment of commercial HLLW and the recovery of^(137)Cs in China.