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Rigorous MCNP based shutdown dose rate calculations: computational scheme, verification calculations and application to ITER

机译：基于严格的MCNP的停机剂量率计算：计算方案，验证计算以及在ITER中的应用

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摘要

A rigorous 2-step (R2S) computational system has been developed for the calculation of shutdown dose rate distributions in full three-dimensional geometry. The system is based on the use of the MCNP transport and the FISPACI inventory code linked through a suitable coupling scheme for the automated routing of decay gamma sources and neutron flux spectra. The decay gamma source distribution is sampled in a source routine linked to MCNP according to the distribution provided by preceding MCNP neutron transport and FISPACT inventory calculations. A detailed description of the flow scheme and the interfaces of the R2S code system is given. Validation of the system has been achieved through the computational analysis of an International Thermonuclear Experimental Reactor (ITER) shutdown dose rate experiment. The application to the ITER device has demonstrated the suitability of the R2S system for handling shutdown dose rate analyses of large and complex fusion reactor systems.
机译：已开发出严格的两步（R2S）计算系统，用于计算完整三维几何形状中的停机剂量率分布。该系统基于通过适当的耦合方案链接的MCNP传输和FISPACI库存代码的使用，以自动路由衰减伽马射线源和中子通量谱。根据先前的MCNP中子传输和FISPACT清单计算提供的分布，在链接到MCNP的源例程中对衰变伽马源分布进行采样。给出了R2S代码系统的流程图和接口的详细说明。通过对国际热核实验反应堆（ITER）停机剂量率实验的计算分析，可以对系统进行验证。在ITER装置上的应用证明了R2S系统适用于处理大型和复杂聚变反应堆系统的停机剂量率分析。

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