摘要
为了研究核装置内中子密度随时间的瞬态变化规律,在Monte Carlo程序DSMC(dynamic system Monte Carlo)的基础上发展了一种新的计算核装置中子时间常数方法,该方法先求得本征分布源,然后求中子时间常数。通过与MCNP(Monte Carlo N-particle)程序计算α本征值的方法及两个模型的计算结果比对分析发现:在超临界和临界情况下两者结果一致;在较深次临界情况下,新方法克服了MCNP程序方法的不足,计算结果更为可靠,特别是在MCNP4C不能顺利完成计算的情况下,新方法依然有效。
A Monte Carlo method was developed to calculate neutron time constants by first calculating the eigen-distribution of the neutron,then calculating the neutron time constant based on the distribution.For supercritical or critical systems, the results are consistent with the α calculational method in the MCNP code.For subcritical systems,the MCNP4C code fails to finish the calculation,while the DSMC code based on the new method runs successfully with reasonable results.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第z1期1057-1061,共5页
Journal of Tsinghua University(Science and Technology)
