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首页> 外文会议>International conference on the physics of reactors;PHYSOR 2010 >ACCURACY ENHANCEMENTS OF THE COARSE-MESH DIFFUSION CORE MODEL QUABBOX/CUBBOX FOR HIGHLY HETEROGENEOUS CORE CONFIGURATIONS
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ACCURACY ENHANCEMENTS OF THE COARSE-MESH DIFFUSION CORE MODEL QUABBOX/CUBBOX FOR HIGHLY HETEROGENEOUS CORE CONFIGURATIONS

机译：高异质核结构的粗网格扩散核模型四方盒/立方体的准确性增强

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摘要

This paper discusses recently implemented improvements of the QUABOX/CUBBOX core model, in order to meet the requirements for achieving higher accuracy in the prediction of assembly- and pin-power distributions in LWR cores. The accuracy of the coarse mesh neutron diffusion code QUABOX/CUBBOX was enhanced by incorporating the assembly discontinuity factors in its cross section libraries. Additionally the SPH method was successfully implemented for the prediction of pin-power distributions. It is shown that even for highly heterogeneous UOX fuel assemblies with fully inserted control rods, pin-power distributions can be predicted within a very good accuracy by applying a hybrid diffusion-transport equivalence algorithm based on the SPH method.
机译：本文讨论了最近实现的QUABOX / CUBBOX核心模型的改进，以满足在预测LWR核心中的组装和引脚功率分布中实现更高的精度方面的要求。通过将组装不连续因素纳入其截面库中，可以提高粗孔中子扩散码QUABOX / CUBBOX的准确性。此外，SPH方法已成功实现了引脚功率分布的预测。结果表明，即使对于具有完全插入的控制杆的高度异构的UOX燃料组件，通过应用基于SPH方法的混合扩散-当量等效算法，也可以在非常好的精度内预测销钉功率分布。

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