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用改进的TRPO流程进行了从动力堆乏燃料后处理高放废液模拟料液中去除锕系元素的串级实验验证。流程中采用了模拟料液中镎的电解还原调价,以提高镎的去除效果。当料液酸度为1mol/l HNO_3时,经过几级萃取能有效地去除模拟料液中>99.9％的镅、钚、镎、铀。改进了早期采用氨羧络合剂络合反萃锕系元素的流程,采用高酸、草酸和碳酸钠分别反萃Am+RE,Np+Pu和U,使锕系元素分成三组,它们之间的交叉沾污很小。裂片元素在流程中的行为分成三类,除稀土、钯、锆、钼随锕系元素共萃外,其他裂片被部分萃取或不被萃取。文中给出了锕系元素和Tc在各级中的浓度剖面,也给出了它们和裂片元素在各物流中的分布。
An improved TRPO procedure was used to verify the removal of actinides from simulated spent feedstock spent fuel reprocessing high level liquid waste. The process used to simulate the liquid feed in the electrolytic reduction of price adjustment, in order to improve the removal of 镎 effect. When the acidity of feedstock is 1mol / l HNO3, after several stages of extraction, 镅, plutonium, 镎 and uranium in the simulated feedstock can be effectively removed. In the early stage, the process of complexation and stripping of actinides with ammonia-carboxylic complexing agent was improved. Amine, RE, Np + Pu and U were stripped by high acid, oxalic acid and sodium carbonate, respectively, and the actinides were divided into three groups Cross-contamination between the small. Splinting elements in the process of behavior is divided into three categories, in addition to rare earth, palladium, zirconium, molybdenum with actinides coextraction, the other lobes were partially or not extracted. The concentration profiles of actinides and Tc in all stages are given in the paper, and the distributions of them and the elements of slits in each stream are also given.