核热推进粒子球床堆堆芯物理建模及计算分析  

Physical Model and Calculation for Particle Bed Reactor of Nuclear Thermal Propulsion

作　　者：姜夺玉 江新标[1] 王立鹏[1] 潘孝兵[1] 张信一[1] 

机构地区：[1]西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室,西安710024

出　　处：《现代应用物理》2014年第4期251-255,共5页Modern Applied Physics

摘　　要：利用MCNP程序对核热推进粒子球床堆堆芯进行物理建模,计算了堆芯临界物理参数,研究了堆芯燃料区均匀化等效建模对堆芯物理特性的影响。结果表明:合理的堆芯燃料均匀化处理可以极大地简化建模过程,中子有效增殖系数keff、中子能谱等参数的计算结果与实际模型相差均十分微小,一般情况下可以使用燃料区均匀化等效模型代替实际模型。This paper presents a new model for calculating the parameters of particle bed reactor by MCNP code, in which the fuel bed is homogenized. The results show that by reasonable homogenizing the fuel bed, the establishing of the new model could be simplified, and the calculated data, such as keff and neutron spectrum, are similar to those obtained by using the particle bed model.

关 键 词：粒子球床堆 建模 临界物理计算 等效均匀化 MCNP 

分 类 号：TL329[核科学技术—核技术及应用]