Purex流程铀钚分离工艺单元数学模型研究  

Computer Simulation and Software Development of Uranium/Plutonium Separation Unit (1B) in Purex Process

作　　者：于婷[1] 何辉[1] 洪哲[2] 刘占元[1] 李峰峰[1] 叶国安[1] YU Ting;HE Hui;HONG Zhe;LIU Zhanyuan;LI Fengfeng;YE Guoan(Department of Radiochemistry,China Institute of Atomic Energy,Beijing 102413,China;Nuclear and Radiation Safety Center,Ministry of Environmental Protection,Beijing 100082,China)

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413 [2]环境保护部核与辐射安全中心,北京100082

出　　处：《原子能科学技术》2019年第2期193-199,共7页Atomic Energy Science and Technology

基　　金：乏燃料后处理重大专项资助项目(BG1700303)

摘　　要：在铀钚分离工艺单元单级数学模型和混合澄清槽瞬态数学模型的基础上,建立了以U(Ⅳ)-N_2H_4为还原反萃剂、混合澄清槽为萃取设备的Purex流程铀钚分离工艺单元数学模型,开发了计算机模拟程序,并使用台架实验数据对程序的可靠性进行了验证。结果表明,模拟程序的计算值和实验值符合良好。在此基础上,利用模拟软件对铀钚分离工艺单元的工艺参数进行了计算分析,结果表明:1BX_1加入位置、1BS和1BX_2酸度对钚反萃率无太大影响,但1BX_1加入位置和补萃级数对钚中去铀系数SF_(U/Pu)有一定影响。A new model was proposed,and a computer program was developed to simulate the uranium/plutonium separation unit(1B),based on the transient model and single-stage module on reductive stripping of plutonium with U(Ⅳ)from 30%TBP/OK.The reliability of the program was verified by the bench-test values.The results show that concentration profiles obtained from program are consistent with the experimental values.The program could predict the performance of the extraction contactor.The separation process was analyzed using the program,and the results show that 1BX 1-stage location,nitric acid concentration in 1BS and 1BX 2 have no effect on plutonium back-extraction efficiencies,but 1BX 1-stage location and various stages of supplement extraction have some effect on SF U/Pu.

关 键 词：PUREX流程 计算机模拟 铀钚分离工艺单元(1B) U(Ⅳ) 钚 

分 类 号：TL241[核科学技术—核燃料循环与材料]