An analysis method and primary calorimetry verification of tokamak plasma facing components (PFCs) baking from EAST

摘要

Baking is an important wall conditioning method that is widely used in tokamak devices to obtain high quality plasma discharges. In order to create a theoretical analysis method for the baking of tokamak plasma facing components (PFCs), the COMSOL Multiphysics software is used to establish and solve a series of the heat transfer models of the experimental advanced superconducting tokamak (EAST) PFCs, as a representative calculation case. The thermohydraulic measurement system (including the temperature, pressure and flow sensors) is successfully installed on EAST to verify the accuracy of the heat transfer model, as a calorimetry verification example. The uncertainty of this analysis method as compared to the experimental results is less than 5% and the robustness of this analysis method is satisfied. These heat transfer models are used to obtain the temperatures on the surface, the internal temperature distributions of the components, and the internal temperature and velocity distributions of the cooling ducts numerically. The significance of these parameters for the fusion reactor design is discussed in detail. This analysis method is an important component of the fusion reactor thermohydraulic analysis method (FRTHAM), and it provides an accurate computing method for fusion reactor baking analysis.