CAJ | 학술논문

近年来，核燃料后处理的计算机模拟研究成为世界各国研究核燃料后处理工艺过程的重要手段。本工作以磷酸三丁酯为萃取剂、煤油为稀释剂的混合有机萃取剂，在 HNO3介质中络合萃取 Np(Ⅳ、Ⅵ)的体系中，利用BP人工神经网络将萃取平衡分配比和萃取操作条件如初始硝酸浓度、初始 Np(Ⅳ、Ⅵ)浓度、初始U(Ⅵ)浓度及温度进行了关联。建立了该体系下磷酸三丁酯络合萃取 Np(Ⅳ、Ⅵ)的人工神经网络模型，并用该模型计算且检验了不同萃取条件对平衡分配比的影响。结果表明：在25~60℃、水相c0(HNO3)为0.1~11 mol/L、水相初始铀质量浓度为0~210 g/L时，该人工神经网络模型可以对Np(Ⅳ、Ⅵ)萃取分配比进行预测，具有较高的计算精度。经过文献Np(Ⅳ、Ⅵ)萃取平衡分配比实验值检验，其检验平均相对误差在2%以内。
근년래，핵연료후처리적계산궤모의연구성위세계각국연구핵연료후처리공예과정적중요수단。본공작이린산삼정지위췌취제、매유위희석제적혼합유궤췌취제，재 HNO3개질중락합췌취 Np(Ⅳ、Ⅵ)적체계중，이용BP인공신경망락장췌취평형분배비화췌취조작조건여초시초산농도、초시 Np(Ⅳ、Ⅵ)농도、초시U(Ⅵ)농도급온도진행료관련。건립료해체계하린산삼정지락합췌취 Np(Ⅳ、Ⅵ)적인공신경망락모형，병용해모형계산차검험료불동췌취조건대평형분배비적영향。결과표명：재25~60℃、수상c0(HNO3)위0.1~11 mol/L、수상초시유질량농도위0~210 g/L시，해인공신경망락모형가이대Np(Ⅳ、Ⅵ)췌취분배비진행예측，구유교고적계산정도。경과문헌Np(Ⅳ、Ⅵ)췌취평형분배비실험치검험，기검험평균상대오차재2%이내。
Computer simulation of nuclear fuel reprocessing in recent years becomes an important means of study the nuclear fuel reprocessing process in the world.Tributyl phosphate as the extractant and kerosene as the diluent were selected for the complex extraction of neptunium (Ⅳ,Ⅵ).By using BP artificial neural networks (ANN ),the equilibrium distribution ratio was correlated with the extraction operational conditions in the extraction system,such as initial concentration of nitric acid,neptunium (Ⅳ,Ⅵ)and uranium (Ⅵ),as well as temperature.The ANN model of extraction equilibrium ratio was established.Moreover, the effects of different extraction condition on the equilibrium <br> distribution ratio were predicted by using the model.The results show that the proposed model can simulate the experimental data and predict the process of extraction well,in the range of experiment conditions,such as 25-60 ℃,0.1-11 mol/L HNO3 and 0-210 g/L U(Ⅵ).After testing by the Np (Ⅳ,Ⅵ) extraction distribution ratio values from the literature,the mean relative error is less than 2%.