堆芯核设计程序CYCAS少群截面模型开发  

Development of Few Group Cross Section Calculation Model for Core Nuclear Design Code CYCAS

作　　者：杨伟焱[1] 汤春桃[1] 毕光文[1] 杨波[1] 

机构地区：[1]上海核工程研究设计院,上海200233

出　　处：《原子能科学技术》2016年第5期859-863,共5页Atomic Energy Science and Technology

摘　　要：少群截面模型为堆芯三维扩散计算提供实时的节块均匀少群截面,是堆芯计算程序的关键模型之一。CYCAS程序是上海核工程研究设计院最新开发的堆芯三维核设计程序。本文在详细解析影响节块截面的各种因素的基础上,提出应用于CYCAS程序的少群截面的模型。该模型采用能谱修正方法处理由于能谱变化所引入的二次效应,采用微观燃耗修正方法处理燃耗历史效应。单组件和AP1000核电厂的数值验证计算表明,该模型具有很高的计算精度。The few group cross section calculation model generates node homogeneous few group cross section for core 3Ddiffusion calculation,which is one of the key models of core calculation code.CYCAS is the new core 3Dnuclear design code developed by Shanghai Nuclear Engineering Research Design Institute（SNERDI）.A new model based on detail analysis of the factors affecting node cross section was developed for CYCAS.In the model,the energy spectrum correction method was used to process the second order effect introduced by energy spectrum change,and the micro-depletion correction method was utilized to treat depletion history effect.The numerical results of unit assembly and AP1000 core validate the high accuracy of the new model within CYCAS.

关 键 词：堆芯核设计程序 少群截面模型 能谱修正方法 微观燃耗修正方法 CYCAS 

分 类 号：TL329[核科学技术—核技术及应用]