ABSTRACT

A new burnup calculation method for burnable absorber-containing fuels called the Advanced Optimally-Weighted Predictor-Corrector (AOWPC) method is proposed based on the OWPC method. The AOWPC method can effectively reduce the time discretization errors in the burnup calculation. Verification calculations comparing with the conventional predictor-corrector (PC) and projected PC (PPC) methods are performed for the PWR and BWR fuel assemblies. The calculation accuracy of the AOWPC method is higher than the conventional PC method, whose burnup step is one third of the AOWPC method, and the PPC method, whose burnup step is two thirds of the AOWPC method. The additional computation time per time step for the AOWPC method is negligible compared to those for the conventional PC and PPC methods. Therefore, the computation time of the burnup calculation can be reduced using the AOWPC method.

摘要

在 OWPC 方法的基础上，提出了一种新的含可燃吸收剂燃料的燃耗计算方法，称为高级优化加权预测校正法（AOWPC）。AOWPC 方法可以有效减少燃耗计算中的时间离散化误差。对 PWR 和 BWR 燃料组件进行与传统预测校正器 (PC) 和投影 PC (PPC) 方法相比的验证计算。AOWPC法的计算精度高于传统PC法，其燃耗步长为AOWPC法的三分之一，PPC法的燃耗步长为AOWPC法的三分之二。与传统 PC 和 PPC 方法相比，AOWPC 方法每个时间步的额外计算时间可以忽略不计。所以，