This paper demonstrates a computer simulation model for single-null diverted plasma configurations that include simultaneous interaction of the scrape-off layer (SOL) plasma with toroidally symmetric main-chamber limiter surfaces and divertor plate surfaces. The simulations use the UEDGE code which treats the SOL plasma and recycled neutrals as two-dimensional toroidally symmetric fluids. The spatial domain can include field lines that intersect main-chamber surfaces in the far scrape-off layer, which allows the model to include simultaneous plasma contact with both divertor and main-chamber targets. Steady-state simulation results for low density L-mode plasma discharges in DIII-D show that total core fueling increases by about 70% when the limiter gap is reduced from 6cm to 3cm mapped to the midplane. The additional core fueling is due to neutrals which originate from the ion particle flux incident on the upper outer divertor baffle.