氟盐冷却球床高温堆次锕系核素的嬗变研究  

Study on Transmutation of Minor Actinides in Fluoride Cooled Pebble Bed High Temperature Reactor

作　　者：贾国斌 戴叶[1,2] 陈金根 邹杨[1,2] 蔡翔舟 JIA Guobin;DAI Ye;CHEN Jingen;ZOU Yang;CAI Xiangzhou(Shanghai Institute of Applied Physics,Chinese Academy of Science,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049

出　　处：《原子核物理评论》2022年第4期539-545,共7页Nuclear Physics Review

基　　金：国家重点研发计划项目(2020YFB1902000);中国科学院TMSR先导专项资助项目(XDA02010000);中国科学院前沿科学重点研究项目资助(QYZDY-SSW-JSC016)。

摘　　要：针对氟盐冷却球床高温堆(FHR)深燃耗的特征,研究了FHR嬗变次锕系核素(MA)的可行性。研究结果表明:(1)优化后燃料球的参数为U-235富集度19.75%,UO_(2)与MAO2质量比为18:1;(2)燃料球在堆芯内的流速为4.59 cm/d、最深燃耗150 GWd/tHM;(3)次锕系核素的总嬗变率为26.16%。其中,Np-237、Am-241、Am-243通过中子的俘获吸收到重核素、β衰变到裂变核素两条途径可有效嬗变,Cm-243、Cm-244、Cm-245由于轻核素的俘获吸收以及β衰变的积累效应,不能有效嬗变。According to the characteristics of deep burnup of fluorine salt cooled spherical bed high temperature reactor(FHR),the feasibility of transmutation of minor actinides by FHR is studied in this paper.The results show that:(1)the enrichment of U-235 is 19.75%,and the mass ratio of UO_(2)to MAO_(2)in triso is 18:1 after pebble optimized;(2)The flow rate of pebble in the core is 4.59 cm/d and the deepest burnup is 150 GWd/tHM;(3)The total transmutation rate of minor actinides is 26.16%.Among them,Np-237,Am-241 and Am-243 are transmuted by capture absorption and β decay to fission nuclide.Cm-243,Cm-244 and Cm-245 cannot transmute effectively,due to accumulation effect by capture adsorption andβdecay.

关 键 词：氟盐冷却球床高温堆 次锕系核素 嬗变 

分 类 号：TL426[核科学技术—核技术及应用]