Numerical Analysis on Neutron Shielding Structure of ITER Vacuum Vessel  

作　　者：刘常乐 武松涛 郁杰 盛道林 

机构地区：[1]Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

出　　处：《Plasma Science and Technology》2008年第3期373-378,共6页等离子体科学和技术（英文版）

基　　金：the National 973 program of China(No.2004CB720704)

摘　　要：The neutron shielding component of ITER （International Thermonuclear Experimental Reactor） vacuum vessel is a kind of structure resembling a wall in appearance. A FE （finite element） model is set up by using ANSYS code in terms of its structural features. Static analysis, thermal expansion analysis and dynamic analysis are performed. The static results show that the stress and displacement distribution are allowable, but the high stress appears in the junction between the upper and lower parts. The modal analysis indicates that the biggest deformation exists in the port area. Through modal superposition, the single-point response has been found with the lower rank frequency of the acceleration seismic response spectrum. But the deformation and the stress values are within the permissible limit. The analysis results would benefit the work in the next step and provide some reference for the implementation of the engineering plan in the future.The neutron shielding component of ITER （International Thermonuclear Experimental Reactor） vacuum vessel is a kind of structure resembling a wall in appearance. A FE （finite element） model is set up by using ANSYS code in terms of its structural features. Static analysis, thermal expansion analysis and dynamic analysis are performed. The static results show that the stress and displacement distribution are allowable, but the high stress appears in the junction between the upper and lower parts. The modal analysis indicates that the biggest deformation exists in the port area. Through modal superposition, the single-point response has been found with the lower rank frequency of the acceleration seismic response spectrum. But the deformation and the stress values are within the permissible limit. The analysis results would benefit the work in the next step and provide some reference for the implementation of the engineering plan in the future.

关 键 词：ITER vacuum vessel neutron shielding structure numerical analysis finite element method 

分 类 号：TL64[核科学技术—核技术及应用]