Investigation on the Thermal Conductivity and Heat Flux Route of the Tungsten Divertor Monoblock under the Fracture Conditions for EAST Tokamak

EAST tungsten divertor has experienced the plasma discharges with fruitful outcomes at the long-pulse H-mode for 4 years. The divertor failure issues on the tungsten monoblocks are concerned on recently for the high parameter operations in the plasma discharges. In this work, the fractures and the cracks issues on tungsten blocks are focused on since it has the great impact on the divertor thermal conductivity. Numerical simulations based on finite elemental method are carried out to confirm the change of the thermal conductivity properties.