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。
The Monte Carlo method is used to simulate unsteady-state particle transport calculations. Due to the computational time existing obviously difference among the different steps and I/O percentage is rated high, it results in the parallel com-putation efficiency down if the fix processors are used in each step. So parallel I/O and the adaptive parallel algorithms are developed. The good results and high speedup are obtained.
