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Computational results of the nuclear analyses for the ECRH launcher integrated into the ITER upper port are presented in the paper. The purpose of the analyses was to provide the proof for the launcher design that the nuclear requirements specified in ITER project can be met. The aim was achieved on the basis of 3D neutronics radiation transport calculations using the Monte Carlo code MCNP. In the course of the analyses an adequate shielding configuration against neutron and gamma radiation was developed keeping the necessary empty space for mm-waves propagation in accordance with the ECRH physics guidelines. Different variants of the shielding configuration for the Extended Performance front steering Launcher (EPL) are compared in terms of nuclear response functions in the critical positions. Neutron damage (dpa), nuclear heating, helium production rate, neutron, and gamma fluxes have been calculated under the conditions of ITER operation. It has been shown that that radiation shielding criteria and supposed shutdown dose rate are below the ITER nuclear design limits.

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