蒙特卡罗共轭输运法计算堆外探测器三维空间响应函数  

Calculation of Ex-Core Detector 3D Space Response Function via Monte Carlo Adjoint Transport Method

作　　者：周旭华[1] 李富[1] 王登营[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《核动力工程》2010年第3期14-18,共5页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(No10675071)

摘　　要：堆外中子探测器的读数包含有堆芯功率分布的信息,探测器读数与堆芯功率分布之间的联系可由探测器空间响应函数建立。准确的堆外探测器三维空间响应函数是实现由堆外探测器读数重构出堆芯功率分布的关键之一。本文利用蒙特卡罗程序(MCNP),采用共轭输运的计算方法,以压水堆为例,计算分析堆外探测器的三维空间响应函数,并与以往二维离散纵标法的计算结果进行比较。结果表明采用三维计算是必要的,而蒙特卡罗共轭输运法可以方便地实现三维复杂几何下的空间响应函数计算。The readings of ex-core detectors contain the information of in-core power distribution,and the relationship between ex-core detector readings and in-core power distribution is the detector space response function.The key prerequisite of using ex-core detector readings to reconstruct the in-core power distribution is to calculate the space response function accurately.The space response function of one pressured water reactor is calculated via Monte Carlo adjoint transport method in this paper by using the MCNP code.The numerical result shows that there are some difference from that obtained via SN adjoint transport on two-dimensional geometry,and indicates the necessity to calculate the ex-core detector space response function on three-dimensional geometry.Monte Carlo adjoint transport method is convenient to calculate the three-dimensional spatial response function.

关 键 词：蒙特卡罗方法 共轭输运 堆外探测器 探测器空间响应函数 

分 类 号：TL411.1[核科学技术—核技术及应用]