“…Experimental results (Décossin, 2000;Konovalikhin et al, 2000) have shown that two-dimensional effects due to heterogeneities in the bed or at the boundaries may increase significantly the critical heat flux. At the same time, new two-dimensional theoretical models, such as DECO-2D (Likhanskii et al, 1998) and WABE-2D (Mayr et al, 1998), presented the same trends. The present paper brings complementary results that confirm the previous observations and show the necessity to take into account multi-dimensional effects in order to properly calculate dryout or reflooding in a debris bed.…”