利用RMC程序计算与分析灰体控制棒的价值损耗  

Calculation and Analysis of Grey Control Rod WorthDepletion With Reactor Monte Carlo Code

作　　者：肖鹏[1] 李满仓[1] 罗琦[2] 姚栋[1] 夏榜样[1] 刘同先[1] 于颖锐[1] 辛素芳 XIAO Peng;LI Man-cang;LUO Qi;YAO Dong;XIA Bang-yang;LIU Tong-xian;YU Ying-rui;XIN Su-fang(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu 610041,China;Nuclear Power Institute of China,Chengdu 610041,China)

机构地区：[1]中国核动力研究设计院,核反应堆系统设计技术重点实验室,成都610041 [2]中国核动力研究设计院,成都610041

出　　处：《现代应用物理》2020年第1期25-33,共9页Modern Applied Physics

摘　　要：在2种吸收体半径下,利用RMC程序计算了5种吸收体材料的控制棒价值相对当量随燃耗的变化及各材料中每个核素的核子密度随燃耗的变化,给出了各材料作为控制棒时,栅元内的中子通量密度和归一化中子通量密度随中子能量的变化关系,并结合中子吸收截面和核素燃耗链,对计算结果进行了分析。结果表明,不同吸收体半径下,各吸收体材料的控制棒价值相对当量和核子密度随燃耗的变化规律不同,Dy,Ag,W作为吸收体材料时,控制棒价值相对当量随燃耗的变化曲线较为平缓,可作为灰棒吸收体候选材料。The relative strength of rod worth and the nuclide density versus the burnup of five kinds of absorber materials with two different absorber’s radii are calculated with the reactor Monte Carlo code(RMC).The relationship between neutron flux density in the grid element and normalized neutron flux density versus neutron energy is analyzed by combining neutron absorption cross-section and nuclide depletion chain when each material is used as control rod.The results show that the control rod worth and the nuclide density for each absorber material vary with the burnup with different radius,while the control rod worth varies smoothly with the burnup when Dy,Ag and W are used as the absorber materials,and thus they are recommended as the candidate materials for the grey rod absorber.

关 键 词：堆用蒙特卡罗分析程序 灰棒 棒价值损耗 中子吸收体 中子能谱 

分 类 号：TL329[核科学技术—核技术及应用]