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采用微型离心萃取器进行了TRPO流程从模拟高放废液中去除锕系元素的冷实验。实验中用Nd代替Am,Zr代替Np、Pu,在模拟高放废液稀释3倍、酸度为1.0mol/l时,采用12级萃取、4级洗涤能有效地去除模拟高放废液中99.9%以上的Nd、Zr,满足了冷实验要求,并且萃取中不出现三相,可以使萃入的Fe洗下60%,避免大量Fe进入后续流程。采用硝酸、草酸分别反萃Nd和Zr,使Nd和Zr分成二组,交叉污染很小。文中给出了硝酸、Nd、Zr等在各级的浓度剖面和它们在各物流中的分布。
A microcentrifugal extractor was used to conduct the TRPO procedure to remove actinides from simulated high level liquid waste. In the experiment, Nd was used instead of Am and Zr instead of Np and Pu. When simulated high-level liquid waste was diluted 3 times and acidity was 1.0mol / l, 12-stage extraction and 4-stage washing could effectively remove simulated high level liquid waste More than 99.9% of Nd and Zr meet the requirements of cold experiment, and three phases do not appear in the extraction, which can wash 60% of the extracted Fe and prevent a large amount of Fe from entering the subsequent process. Nitric acid and oxalic acid were employed to stripping Nd and Zr, respectively. Nd and Zr were divided into two groups with little cross-contamination. The concentration profiles of nitric acid, Nd, Zr and so on at all levels are given and their distribution in each stream is given.