ELM induced carbon contamination of ITER core

Type I ELMs in ITER would result in the divertor targets vaporization. Vaporized carbon plasma can contaminate the thermonuclear plasma in the ITER core decreasing the plasma temperature and the fusion power or even run the confinement into disruption. Simulations of the tolerable ELM frequency as a function of ELM size are carried out for ITER using TOKES and FOREV-2D codes. Improved FOREV-2D scenario proposed for simulation of the carbon plasma influx into ITER pedestal. An elaborated model for carbon penetration into the confined plasma from pedestal is implemented in TOKES. Simulation of tolerable ELM frequency has been done for 3.5–12.1 MJ of the total ELM energy loss. The tolerable frequency is less than 10 Hz for the ELM of 7.3 MJ and decreases with increasing of the energy loss.