多群蒙特卡罗程序MCMG的开发与基准校验

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基金项目:

国家自然科学基金项目资助(10505014)

Development and Benchmark Calculation of Multigroup Monte Carlo Code MCMG

1. Department of Nuclear Science and System Engineering, Shanghai Jiaotong University, 00030, China;
2. Qinshan Nuclear Power Company, Haiyan, Zhejiang, 314300, China;
3. Institute of Applied Physics and Computational Mathematics, Beijing, 100088, China

摘要: 基于连续能量蒙特卡罗程序MCNP开发了多群蒙特卡罗程序MCMG。利用由栅元程序WIMS产生的随燃耗变化的多群宏观均匀化截面取代连续能量点截面,大大提高了程序的计算速度,同时也解决了蒙特卡罗程序不能进行燃耗计算等问题。针对输运修正引起的自散射截面导致的负概率抽样现象,提出了一种非负修正方法,并用基准计算验证了该方法的正确性。
- 多群 /
- 蒙特卡罗 /
- 均匀化截面 /
- MCMG
Abstract: A multigroup Monte Carlo Code MCMG is developed based on the continuous-energy Monte Carlo Code MCNP.The continuous-energy point-cross sections are substituted by the homogenized multi-group cross sections as the function of burnup by the lattice code WIMS,which speedup the computation procedures and supply the capability of burnup simulations for the Monte Carlo Code.Because of the phenomenon that the negative self-scattering cross sections cause the negative probability sample,a nonnegative corrected method is put forward and validated by the benchmark problems.
- Multigroup /
- Monte Carlo /
- Homogenized cross sections /
- MCMG