堆芯功率分布重构方法分析

Analysis of Method in Core Power Reconstruction

本文介绍了堆芯功率分布重构方法中传统的两种方法:权重系数法及多项式展开法。用堆芯计算程序SMART构造测量和预测状态分布,分别采用权重系数法和多项式展开法进行径向功率重构。计算结果显示,在径向重构中多项式展开法对瞬态及局部下的重构效果并不佳,而权重系数法则能部分重构堆芯局部各处的偏差分布。在稳态下,两种重构算法各有优点。

Two reactor core reconstruction methods based on the deviation fitting principle which included the weight coefficient method and polynomial fitting method were provided.Two theoretical core power distributions were generated by nodal code SMART.Based on the theoretical core power distributions,the reactor powers were reconstructed by two methods.The result shows that the weight coefficient method is better than polynomial fitting method in the case of local transient state.However,both two methods have comparable performance for the steady state.