程序二维/一维耦合特征线输运计算中的控制棒尖齿效应处理方法  

Treatment Method of Control Rod Cusping Effect in 2D/1D Coupled Characteristics Transport Calculation

作　　者：张思凡 刘宙宇[2] 赵寒冰 陈兴 王博 Zhang Sifan;Liu Zhouyu;Zhao Hanbing;Chen Xing;Wang Bo(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213;School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an,710049,China;Naval Armament Department,Chengdu,610213,China;Chengdu University,Chengdu,610106,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610213 [2]西安交通大学核科学与技术学院,西安710049 [3]海军装备部,成都610213 [4]成都大学,成都610106

出　　处：《核动力工程》2023年第6期23-31,共9页Nuclear Power Engineering

基　　金：国家自然科学基金(11775169,11735011)。

摘　　要：在二维/一维耦合特征线输运的基础上,研究了控制棒移动的尖齿效应处理方法,包括自适应网格方法和双向均匀化方法。在双向均匀化方法中,通过建立径向通量密度形状因子和轴向通量密度形状因子降低均匀化的误差。在高保真数值反应堆程序NECP-X中开发了控制棒移动功能,通过C5G7-TD宏观问题和VERA#5全堆芯基准题对控制棒尖齿效应进行验证。数值结果表明:在计算控制棒价值和堆芯功率上自适应网格方法和双向均匀化方法都有较高的计算精度;通量密度形状因子可以很好地修正双向均匀化所带来的尖齿效应。On the basis of 2D/1D coupled characteristics transport,the treatment method of cusping effect of control rod movement are studied,including adaptive mesh method and bidirectional homogenization method.In the bidirectional homogenization method,the homogenization error is reduced by establishing radial flux profile and axial flux profile.The control rod movement function is implemented in high fidelity numerical reactor code NECP-X.The treatment of the control rod cusping effect is verified by the C5G7-TD benchmark and VERA#5 benchmark.The numerical results show that the adaptive mesh method and the bidirectional homogenization method both have high accuracy in the calculation of control rod value and core power.The control rod cusping effect caused by bidirectional homogenization can be well corrected by flux profile.

关 键 词：二维/一维耦合特征线方法 控制棒尖齿效应 双向均匀化 通量密度形状因子 NECP-X 

分 类 号：TL323[核科学技术—核技术及应用]