摘要
处理三维中子时空动力学问题时,在时间的处理上采用了改进型准静态方法,将总的中子通量密度分解成由时间相关的幅度函数和由时间空间能量相关的形状函数,幅度函数通过三阶多项式插值方法求解,而形状函数则通过节块法程序NAS程序系统的稳态扩散或者输运模块求解,以此为基础,开发了三维时空动力学程序NAS-K。并给出了与两个国际基准例题(无反馈弹棒事故和简单的绝热多普勒反馈弹棒事故)计算结果的比较,结果符合很好,初步验证了本程序的正确性。
To solve the three-dimensional neutron kinetics problems, the Improved Quasi- Static Method（IQS） is adopted to deal with the temporal problem by factorizing the total flux into a time-dependent amplitude function and a space-energy-time-dependent shape function. The shape-function calculation is solved by NAS code and the amplitudefunction is solved by third-order Hermite polynomials. Based on this method, 3-D hexagonal kinetics program NAS-K has been developed and tested with two benchmark problems of VVER, which are the control rod ejection without any feedback and the control rod ejection with simple adiabatic Doppler feedback. A good agreement on results is achieved and the program is validated.
出处
《核科学与工程》
CSCD
北大核心
2012年第3期219-224,共6页
Nuclear Science and Engineering
