论文部分内容阅读
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。
In order to study the variation of neutron density in nuclear devices over time, a new method for calculating neutron time constants of nuclear devices was developed based on Monte Carlo dynamic system Monte Carlo (DSMC) Eigen distribution source, then seek neutron time constant. By comparing with the method of calculating the eigenvalue of a with MCNP (Monte Carlo N-particle) program and the calculation results of the two models, it is found that the results are consistent in both supercritical and critical conditions; in the case of deeper sub-critical conditions, The new method overcomes the shortcomings of the MCNP program method, the calculation results are more reliable, especially in the case of MCNP4C can not be successfully completed the calculation, the new method is still valid.