DHDECMP-TBP/煤油萃取模拟高放废液中的裂片元素工艺研究

Technology Study on the Extraction of Fission Products From Simulated High-lev el Liquid Waste by Mixture of DHDECMP and TBP in Kerosene

实验测定了22%DHDECMP 42%TBP OK从模拟高放废液中萃取Zr、Mo、Cs等裂片元素的分配比,并在微型离心萃取器(转鼓10mm)串联台架上进行了从模拟高放废液中萃取裂片元素的工艺研究。采用6级萃取,2级洗涤,6级反萃,流比AF∶AX∶AS=1∶1.5∶0.5,BF∶BX=1∶1,实验考察了裂片元素的各级浓度分布。对Zr、Mo的净化系数DF分别为3.2、18;对Rb、Cs、Sr、Ba,DF>103。

The distribution ratios of fission products, such a s Zr, Mo, Cs etc. are measured based on the single stage extraction experiments of simulated highlevel liquid waste with 22%DHDECMP42%TBP/OK. The extraction b ehavior of the fission products in simulated highlevel liquid waste is determi ned on miniature countercurrent centrifugal contactor cascade (6 stages for extr action, 2 stages for scrubbing, 6 stages for stripping, AF∶AX∶AS=1∶1.5∶0.5 ;BF∶BX=1∶1). The experimental results show that in 1A extraction section, th e recovery of RE's (except for Y) is greater than 99.9%, while Rb, Cs, Sr and Ba are nearly not extracted, the decontamination factor (DF) for Zr, Mo is 3.2, 18 , respectively and is more than 3×102 for Ru and In.