Predictive modeling of the JET D-T plasma boundary

The SOLPS-ITER3.0.8 code with new Grad-Zhdanov module was applied for predictive modeling of tritium plasma and deuterium-tritium mixture in tokamak JET. The moderate power scenario of shot JPN #85278 modeled earlier for deuterium plasma was taken as a starting point. Effect of puffing increase, which was applied in experiment, on divertor conditions and inter-ELM tungsten sputtering for both working gases and on isotope separation in their mixture is analyzed. Both for attached and for semi-detached outer targets, the tritium plasma shows moderate increase in SOL width compared to deuterium one. The tungsten sputtering at the outer target in the inter-ELM period for tritium is an order of magnitude bigger than that for deuterium. The D-T separation in the D-T mixture is moderate.