基于切比雪夫有理近似方法的点燃耗程序开发

Development of Point-Depletion Code Based on Chebyshev Rational Approximation Method

基于切比雪夫有理近似方法(CRAM)开发了点燃耗求解程序。程序采用2套燃耗数据库,精细燃耗数据库和简化燃耗数据库,并将点燃耗程序与输运系统耦合。计算了定注量率辐照问题和衰变问题,以及JAEA轻水堆基准题,计算结果与国际知名程序对比。结果表明,程序在定注量率辐照问题和衰变问题的计算上,核子密度精度与ORIGEN2相当,单栅元和组件计算结果与HELIOS1.11以及参考解吻合良好。

A point-depletion code is developed based on the Chebyshev Rational Approximation Method(CRAM). The code has two burnup libraries, a detailed burnup library and a simplified burnup library. The code is coupled with the transport system. The fixed flux irradiation and decay problem, as well as the JAEA benchmark for light water reactors, were calculated and compared with international well-known codes. The results show that the accuracy of the atom number density is equivalent to that of ORIGEN2 in the calculation of fixed flux irradiation and decay problem. The results of pin cell and assembly cases agree well with HELIOS1.11 and the reference solutions.