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硝酸羟胺在动力堆乏燃料后处理流程钚线第三循环中的应用
PLUTONIUM PARTIONNING IN THE THIRD PLUTONIUM CYCLE OF THE PUREX PROCESS WITH HYDROZINE-STABILIZED HYDROXYLAMINE NITRATE
【摘要】 为动力堆乏燃料后处理流程的设计之用,通过还原实验,研究温度、溶液酸度、硝酸羟胺(HAN)与钚的初始浓度比值对HAN还原Pu(Ⅳ)的还原百分数的影响。结果表明,升温、低酸和合适的HAN用量有利于Pu(Ⅳ)的还原。用模拟料液进行3A槽和3B槽串级实验的结果表明:3A槽的钚回收率达99.9%以上,3B槽的达99.98%;钚中去铀分离系数达50左右。通过单级和串级实验,研究了含钚30%(V/V)TBP-煤油放置时间对钚反萃率的影响。反萃率随放置时间增长而下降。
【Abstract】 The effects of some factors such as concentration of nitric acid, the molar ratio of hydroxy-lamine nitrate to plutonium and temperature on the stripping of plutonium are investigated. Cas-cade experiment with simulated 3AF and 3BF feed are carried out at room temperature and elevat-ed temperature(45--50℃) respectively. Plutonium recovery and DF for removal of uranium fromplutonium stream are given. Standing time of the organic phase loaded with plutonium influencesre-extraction of plutonium significantly.
- 【文献出处】 原子能科学技术 ,Atomic Energy Science and Technology , 编辑部邮箱 ,1993年05期
- 【被引频次】8
- 【下载频次】95