高放废液中<sup>137</sup>Cs的萃取去除

高放废液中¹³⁷Cs的萃取去除

摘要: 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¹³⁷Cs不仅有利于实现高放废液的安全处置，也可满足¹³⁷Cs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¹³⁷Cs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¹³⁷Cs分离提取提供了参考数据。

Abstract: 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 ¹³⁷Cs from HLLW is not only beneficial to the safe disposal of HLLW, but also meeting the needs of ¹³⁷Cs in many industry fields. In this work, the extraction process for ¹³⁷Cs 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 ¹³⁷Cs, 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 ¹³⁷Cs in China.