  This paper presents the DYON simulations of the plasma burn-through phase at
Joint European Torus (JET) with the ITER-like wall. The main purpose of the
study is to validate the simulations with the ITER-like wall, made of
beryllium. Without impurities, the burn-through process of a pure deuterium
plasma is described using DYON simulations, and the criterion for deuterium
burn-through is derived analytically. The plasma burn-through with impurities
are simulated using wall-sputtering models in the DYON code, which are modified
for the ITER-like wall. The wall-sputtering models and the validation against
JET data are presented. The impact of the assumed plasma parameters in DYON
simulations are discussed by means of parameter scans. As a result, the
operation space of prefill gas pressure and toroidal electric field for plasma
burn-through in JET is compared to the Townsend avalanche criterion.
