中国散裂中子源靶站重要部件的辐照损伤计算与分析  

Calculation and analysis of DPA in the main components of CSNS target station

作　　者：于全芝[1] 殷雯[1] 梁天骄[1] 

机构地区：[1]中国科学院物理研究所散裂中子源靶站谱仪工程中心北京凝聚态物理国家重点实验室,北京100190

出　　处：《物理学报》2011年第5期194-201,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11075203;91026009)资助的课题~~

摘　　要：本文采用高能粒子输运程序MCNPX2.5.0,对中国散裂中子源(CSNS)靶站重要部件所使用的钨、SS316不锈钢与Al-6061等材料,由于中子与质子辐照所引起的损伤能量截面与原子离位截面进行了计算,对钨靶体、靶的不锈钢容器、慢化器与反射体的铝容器等部件的辐照损伤量——原子离位次数(displacement pe ratom,DPA)进行了计算与分析,并给出了质子束斑形状对靶体及靶容器DPA峰值的影响.这些计算与分析对正在建设的中国散裂中子源靶站的设计及参数选择具有重要的实际意义.The damage energy cross sections and displacement cross sections of W,SS316 and Al-6061,which will be used in the CSNS（China Spalllation Neutron Source） target station,were calculated with the high energy transport code MCNPX 2.5.0.The DPA（Displacement Per Atom） distributions were also calculated and anlyzed for the main components in the CSNS target station,such as the W target,the target vessel,the moderators and reflector vessels.Based on the DPA caused by neutrons and protons,the lifetime of these components were estimated.The influence of the proton beam profile on the peak value of DPA for W target and target vessel were also presented.These calculations and analyses are very important for the under going CSNS project.

关 键 词：中国散裂中子源 损伤能量截面 原子离位截面 DPA 

分 类 号：O571.53[理学—粒子物理与原子核物理]