Structure Design&Analysis Of In-wall Shielding For ITER

International Thermonuclear Experimental Reactor (ITER), whose purpose is to demonstrate the technological exactitude, engineering feasibility, operating security of thermonuclear fusion reactor for peaceful and safe purpose as an energy source, is a large-scale international cooperation project which is ongoing study. ITER VV(vacuum vessel) IWS (in wall shielding) is used to shield the neutrons flux which were produced in the nuclear reaction, and protect the reactor structure.The subject is supported by the Major State Basic Research Development Program of China (973)--"research of ITER high temperature superconducting ultra high current lead type superconducting transmission line’’The subject research focus are shown as follows:Taking into account the structure characteristic of ITER VV, the systemically study on the concept design, detail design, assembly methodology has been fulfillshed. then by using the FEM (finite element method) theory, the analyses of the structure of statics have been performed in order to compare the design result with design requirements from ITER team.Main research work and creative points of the paper are shown as follows:Firstly, based on the introduction for fusion principle, and the VV structure characteristic, the modular and digital design method used on the modules partition and tag setting of the in wall shielding have been proposed; secondly, with3d design software CATIA, detail design has been offered, and a database including all parts of the shielding structure has been build; and then, with the virtual assembly simulation software DELMIA, the assembly process of shielding block simulation analysis has been performed, and the assembly scheme of every type shielding block has been defined; finally, according to the design requirement of ITER project, the analysis of the structure of statics has been performed on the shielding block, the peak stress and deformation of shielding block, bracket, and bolt which verifier the safety performance of the shielding structure under the various load. Figure58table18reference65...