高阶预估-校正燃耗方法在压水堆组件计算中的应用

摘要

压水堆燃料组件输运燃耗耦合计算通常采用的是传统的预估-校正(PC)燃耗方法.然而,该方法本身的假设导致其存在一定的计算误差.为进一步提高燃耗计算的精度,本文针对传统的预估-校正燃耗方法的缺陷研究了改进的预估-校正燃耗方法,改进了对核反应率进行修正的高阶预估-校正燃耗方法,并在Bamboo-Lattice程序中进行了程序实现,对该方法进行了验证分析.结果表明:改进的预估-校正燃耗方法和高阶预估-校正燃耗方法在保证计算效率的前提下提高了燃耗计算的精度.%The coupling calculation of transport and depletion usually adopts traditional predict-correct (PC)burnup method in PWR fuel assembly.However,the method results in the calculation error because of its assumption.In order to improve the accu-racy of burnup calculation,the modified PC burnup method was studied and high-order PC burnup method which corrected the microscopic reactivity was improved.Corre-sponding code was developed to verify and analyze these burnup methods with some benchmarks.The results indicate that new methods improve the calculation accuracy under the premise of insuring calculation efficiency.