Conceptual Design And MHD Analysis Of The Liquid Blanket For CFETR

China Fusion Engineering Testing Reactor is a Tokamak between ITER and DEMO. The blanket is one of the most important parts of a fusion reactor, and it is a key component of energy conversion. Because of the advantages of solid blanket, the liquid blanket has good prospects for long-term development of fusion reactors. The future studies should be focusing on designed liquid blanket to resolve liquid blanket present technical problems and technical difficulties.In this paper, current research liquid blanket is analyzed to provide reference for the conceptual design of CFETR liquid blanket. This paper describes the design goals of liquid blanket and analyzes structural design of CFETR liquid Blanket firstly.Then calculate the blanket of the first wall of the thermal-hydraulic functions, analyzed thermal hydraulics of the first wall of blanket facing the plasma and explore its heat carrying capacity in extreme heat conditions while studying the impact of the road roughness of the helium cooling tube on thermal-hydraulic of the first wall and improving model of the pipeline of the first wall. With such improvement, cooling capacity and appropriate outlet temperature for helium gas tritium are ensured.The MHD effect of liquid metal flow in the square tube is analyzed theoretically based on MHD equations to explore the different factors impact on the MHD pressure drop while simulating liquid metal flow in the square tube using FLUENT. The relationship between the MHD effect inner insulating the pipe and magnetic field strength, pipe size, the magnetic field direction, Hartmann are analyzed, so is the different MHD effect in the insulating and conductive square tube with the same pipeline and boundary. And the impact on MHD effect from conductivity of plug material, direction of the plug, the shape of plug in conductive tube is analyzed to provide reference for the design of plugs in liquid blanket. As the results, the differences between simulating values to verify the reliability of calculation method. In the last chapter, theoretical analysis and numerical simulation for the model pipelines of CFETR liquid blanket are accomplished based on the foregoing analysis. The calculated pressure drop meets the design requirements.