CAJ | 학술논문

为探讨两维/一维综合法堆芯分析方法,本文基于特征线法研制了一维中子输运程序--PEACH-1D.不同于通常的平源近似特征线方法,PEACH-1D可对子区的中子源项作线性近似;程序运用指数函数插值表和渐近源外推技术来加速计算过程.相关数值结果表明,PEACH-1D具有很高的计算精度和效率,线性源近似的特征线法具备处理较粗网格的能力,值得推广.
위탐토량유/일유종합법퇴심분석방법,본문기우특정선법연제료일유중자수운정서--PEACH-1D.불동우통상적평원근사특정선방법,PEACH-1D가대자구적중자원항작선성근사;정서운용지수함수삽치표화점근원외추기술래가속계산과정.상관수치결과표명,PEACH-1D구유흔고적계산정도화효솔,선성원근사적특정선법구비처리교조망격적능력,치득추엄.
To investigate the 2D/1D fusion core analysis method, a 1D neutron transport problem solver, PEACH-1D, is developed. It is a code of method of characteristics (MOC), both the usual flat-source step characteristics (SC) scheme and linear source (LS) approximation scheme are adopted for tracking calculation along the neutron flying trajectory. Exponential function interpolation table and fission source extrapolation are adopted as two major methods to accelerate the computational process. Numerical results demonstrate that PEACH-1D is accurate and efficient, and the proposed LS scheme is able to handle quite larger mesh division and deserves much more application in the MOC codes.