Design And Analysis Of Busbar Support On The TF Feeder System For ITER

ITER (International Thermonuclear Experimental Reactor) is a large-scale international cooperation project which is ongoing study. The purpose is to develop a experimental Tokamak fusion reactor, which can self-sustain combustion. And the feasibility, reliability and practicality of thermonuclear fusion reactor project are verified. TF(Toroidal Field) magnet feeder system is one of the indispensable and important systems of ITER, for which is mainly used for power, cooling,data measurement and fault diagnostics. busbar is located within the TF magnet feeder system, to supply the current when the entire vertical field coil current is running, the analysis and development of the reasonable structure of busbar support, and the optimization of the layout program have great theoretical and practical significance for TF feeder system or even the ITER whether to run or not.In the thesis, busbar support of TF magnet feeder system of ITER is systematically, deep analyzed and researched by combining theory analysis, finite element analysis and test together, based on the literature of home and abroad, the reliability of structural design of busbar support has been validated, and the reasonable and accurate structural parameter and reference are provided for the design, manufacturing and construction of ITER.In the thesis, based on the ITER background, structure principle and the role and layout of TF magnet system, the structure and material of busbar support are comprehensive and systematical studied, and the specific calculation method and optimization program of busbar support on TF magnet feeder system are proposed, then the number and spacing of support are determined; the electromagnetic force which is the maximum is calculated by the electromagnetic analysis of magnet system, as boundary condition, the stress of busbar support in the low-temperature and strong magnetic field is discussed in detail; through the overall model of TF feeder system is established, the heat load and cooling process are determined by the stability state and transient thermal analysis; and finally, after the test program is discussed, the mechanical test are carried out about G10 cylinder of CFT(Cryostat Feed-Through). the results show that the structure design and layout program of busbar support are reasonable. it can not only withstand relatively large electromagnetic force(13kN/m) caused by large current in itself(68kA) to prevent big stress and deformation of the busbar, but also ensure that the busbar can axially shrink in the liquid helium temperature, while the busbar has a good thermal insulation which means that heat conduction is very little, the protection is provided for busbar working.