【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。更多还原

【Abstract】 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 keffand neutron spectrum,are similar to those obtained by using the particle bed model.更多还原