Tungsten core accumulation study in EAST plasma with lower tungsten divertor by kinetic impurity transport model

•A new kinetic tungsten impurity transport code based on the guiding center approximation is developed.•The code is benchmarked against the impurity transport code DIVIMP using the lower single null configuration of EAST, and validation is confirmed.•The correlation between the core tungsten density and various forces/anomalous transport, and tungsten core dwell time is given.