基于SuperMC的随机介质程序在双重非均匀性问题中的应用  

Application of random media program based on SuperMC in solving double-heterogeneity

作　　者：朱彤 陈玉清[1] 李昂[1] 谢明亮[1] 叶磊 Zhu Tong;Chen Yuqing;Li Ang;Xie Mingliang;Ye Lei(College of Nuclear Science and Technology,Naval University of Engineering,Wuhan 430033,China;Department of Naval Armaments,Xi’an 710054,China)

机构地区：[1]海军工程大学核科学技术学院,武汉430033 [2]海军装备部,西安710054

出　　处：《强激光与粒子束》2022年第2期126-130,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11502298);核反应堆系统设计技术重点实验室基金项目(HT-KFKT-02-2017103)。

摘　　要：与传统的棒状燃料采用单一UO2陶瓷芯体不同,弥散型板状燃料元件是将燃料微球混合在金属基体中,燃料球与基体间微观上还存在体积的非均匀性。如果不能有效处理弥散燃料的局部空间,自屏效应将对物理特性参数计算带来一定偏差。但传统确定论程序的填卡方式忽略了弥散型燃料具有双重非均匀性的特点。针对板状弥散型燃料栅元,基于SuperMC程序编写随机介质程序,分别建立体积均匀模型和颗粒模型来验证分析弥散型燃料中由空间自屏效应引起的非均匀性。结果表明,该随机介质程序用于SuperMC中,可以解决具有双重非均匀性的弥散型燃料的粒子输运数值模拟问题,再通过建立传统RPT等效模型修正燃料和基体间非均匀性带来的计算偏差。The dispersed fuel element is often used in small integrated PWR.The fuel core is composed of a large number of small fuel microspheres mixed in the metal matrix,and the volume heterogeneity exists between the fuel particles and the matrix.If the local space self-screen effect of the dispersion fuel can not be effectively treated,it will bring some deviation to the calculation of physical property parameters.The traditional deterministic method neglects the double-heterogeneity of dispersive fuel.In this paper,the explicit modelling and the random medium program based on SuperMC are used to establish the volumetric homogenization model and grain model to verify double-heterogeneity.The traditional reactivity-equivalent physical transformation(RPT)model of the dispersive plate-fuel was established to correct the calculation deviation.The results show that the random media program combined with SuperMC can simulate the calculation of transport and burnup of various types of particles,and can well analyze and solve the double-heterogeneity problem.

关 键 词：弥散型燃料 随机介质程序 SuperMC 双重非均匀性 

分 类 号：TL3[核科学技术—核技术及应用]