DESIGN AND STRUCTURE ANALYSIS FOR THE CENTER POSTOF LOW ASPECT RATIO TOKAMAK REACTOR

摘要

The center post is one of the critical components for the low aspect ratio tokamak reactor device, whichendure not only a tremendous Ohmic heating due to its carrying a rather high current but also a large neutronheating and irradiation owing to the plasma operation. The DS copper alloy, Glidcop®, AL-25 was chose as theconductor material for its adequate mechanical properties and physics properties. The center post has a cylinderstructure with lots of cooling channels. The length of center post for the next generation nuclear fusion sphericaltokamak reactor device will be more than 10m or 20m. The stability and stress intensity of its structure are verycrucial for them. When the applied load is very large and over the structure critical load, the device will lose itsstability and collapse. In order to calculate the critical load, a finite element model was used and the force acting onthe center post was simulated. The paper has given the thermal-hydraulic and structure analysis results with finiteelement method based on the small deformation theory. The relation curves and functions for the buckling factordepended on the different length of center post, radius of center post, diameter of the cooling channel and themaximum allowable current density have also been shown.