论文部分内容阅读
传统以两维单组件模型为基础的均匀化理论及后续的改进均匀化理论产生的粗网均匀化参数无法直接体现轻水堆(LWR)堆芯轴向所存在的非均匀性。本文提出了以单组件逐棒模型为基础的三维均匀化方法,为堆芯计算提供粗网均匀化参数,在维持堆芯粗网计算模型的前提下实现对三维效应的处理。基准数值实验表明,本文提出的方法具有较好的精度表现,适用于堆芯轴向三维非均匀性的处理。
The traditional homogenization theory based on two-dimensional one-component model and the coarse uniformization parameter generated by the subsequent improved homogenization theory can not directly reflect the non-uniformity existing in the axial direction of the LWR core. In this paper, a three-dimensional homogenization method based on single-component rod-by-rod model is proposed to provide coarse mesh homogenization parameters for core calculation, and the three-dimensional effect processing is realized on the premise of maintaining core coarse mesh calculation model. The benchmark numerical experiments show that the proposed method has good accuracy and is suitable for the processing of axial three-dimensional non-uniformity of core.