Application of Discrete Ordinate and Monte-Carlo Coupling Method for Reactor Shielding Calculation
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摘要: 建立基于离散纵标方法计算程序DOT以及蒙特卡罗方法计算程序MCNP的耦合方法。通过为MCNP程序SSR命令提供二进制源描述文件,实现在不重新编译MCNP程序条件下的离散纵标与蒙特卡罗耦合。在600 MW核电厂反应堆堆坑小室屏蔽计算中应用耦合方法的计算结果验证该方法的正确性。在耦合方法中研究探索源偏倚策略的实现方式,计算结果表明,源偏倚技术应用与离散纵标与蒙特卡罗耦合方法计算中,能有效降低统计方差,提高计算效率。Abstract: A coupling calculation method based on the discrete ordinate method code DOT and Monte-Carlo method code MCNP was realized. By automatically providing a binary source specification file for the surface source function of MCNP(i.e. SSR command), this coupling method was achieved and subsequently the necessity of re-compiling of MCNP code was eliminated. This coupling method was applied in the shielding problem of rooms around the pit of reactor cavity and a good agreement was obtained between the calculation and measurement results, which validated the correctness of this coupling method. Further more, source bias method was implemented in this coupling method, which shows great efficiency in variance reduction and the improvements of calculation efficiency.
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Key words:
- Discrete ordinate /
- Monte-Carlo /
- Particle transport /
- Coupling calculation /
- Source bias /
- Reactor shielding
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