Damage of ITER Divertor Plates at Plasma Disruption

摘要

The analysis of the effect of ELMs and plasma disruptions in ITER on the divertor plates is carried out. The divertor plates will not melt at ELMs, while melting is expected at plasma disruption. The transport of melted tungsten and droplet erosion are not possible because Kelvin-Helmholtz instability and instability of pulsing bumps do not develop because of the low dynamic pressure of tangential flow of both the initial plasma and plasma formed from the erosion products. The most serious erosion can be the formation of cracks and brittle destruction. The evaporation from the surface will be an additional reason for mass loss.