COBRA code simulation capability for the thermal hydraulic performance of advanced CANDU fuel element (CANFLEX) was studied. Checking the experimental tests carried out at Stern Lab, the dryout power was predicted by COBRA within a 10% band error for a wide range of conditions. Thus, COBRA was used for comparing the performance of the Argentinean design CARA and the AECL/KAERI design CANFLEX, finding comparable performances.

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