Thorex流程离心萃取器验证台架实验

Experimental Verification of Thorex Process in Multi-Stage Centrifugal Extractors

摘要: 钍基核燃料后处理Thorex流程的发展倾向于酸式进料，单循环。基于30级10 mm环隙式离心萃取器台架系统，对酸式进料、单循环Thorex流程工艺进行台架实验验证。实验结果表明：全流程钍回收率为99.994%，铀回收率为99.30%，钍中去铀分离因子SF_U/Th为1.5×10²，铀中去钍分离因子SF_Th/U为2.2×10⁴。增加1B工艺段（钍铀分离段）补萃级数应可以进一步提高铀回收率。

Abstract: The one-cycle acid Thorex process is recommended for thorium-based fuel reprocessing. Experimental verification of Thorex process was performed by 30 stages 10 mm centrifugal extractors. The results show that the recovery of Th and U are 99.994% and 99.30%, respectively. The SF_U/Th and SF_Th/U are 1.5×10² and 2.2×10⁴, respectively. A higher recovery of U should be attained if the stages for supplement extraction of 1B section are increased.