Structure Design And Analysis Of ITER Glow Discharge Cleaning Electrode

With the development of human society and economy,energy and environmental issues have become the main constraints of fast-paced development.In order to protect the natural environment and non-renewable resources,from the perspective of sustainable development,the development of nuclear fusion energy is the only way for human beings,and the International Thermonuclear Experimental Reactor(ITER)was born.As a sub-project of the International Thermonuclear Experimental Reactor,the Glow Discharge Cleaning(GDC)electrode is designed to remove nuclear fuel particles and other impurity particles from the first wall surface to provide a clean and high-consistency plasma.The need for a low recirculation first wall.The design of glow discharge cleaning electrode includes electrode mechanical structure,cooling pipeline and other components,involving multi-disciplinary intersection,which is the key to glow discharge cleaning.The research results will fill the gap in the related field of ITER plan,which is of great significance.In this paper,the ITER glow discharge cleaning system is used as the research basis,and the cleaning electrode body is designed and analyzed.Firstly,the design basis of the ITER glow discharge cleaning electrode,the vacuum environment of the electrode working,the structural characteristics of the vacuum chamber where the electrode is placed,the technical parameters of the electrode,the design requirements and the selection requirements of the design material are described.Basic configuration and functional requirements.Secondly,the main components of the ITER glow discharge cleaning electrode were specifically designed by means of CAD and Solidworks drawing software.In consideration of the installation space of the electrode tip and the requirements of electrical insulation,the shaped ceramic block is designed to insulate the electrode tip.The support insulation of the electrode rod and the design of the axial support adopt the same shaped insulating ceramic as the electrode tip,and the axial flange is designed to support the axial force of the electrode body.In addition,in view of the importance of vacuum penetration,a double-layer structure is used to ensure the sealing of the reaction chamber,the ceramic material ensures the insulation of the vacuum penetrating device,the auxiliary supporting structure ensures the stability of the water pipe,and the design of the vacuum-transparent related components is avoided.The finite element software was used to perform static analysis on vacuum penetration key components to verify the design feasibility.The feeding section is for the entire electrode power supply device.Therefore,in order to ensure the safety and stability of the power supply,the cable is fixed by the clamp structure;in order to avoid electrical damage to other components,the insulating ceramic with the bracket is installed at the other end of the feeding section..Static mechanical analysis of ceramic water pipes and insulating ceramic tubes with finite element software verified the safety and reliability of the design.Finally,the finite element analysis software is used to analyze the electrical strength and statics of the electrode tip and the electrode rod to verify whether the electrode tip electrode design meets the ITER design requirements.The electrical strength and statics simulation analysis of the shielding box is performed to verify the shielding box.Whether the design meets the ITER design requirements.