[en] The need for improved models of core debris interactions with concrete has been met by several computer codes. In this paper, the status of validation of one of these codes, CORCON, will be discussed. The phenomenon that the CORCON code and the other core debris/concrete interactions codes attempt to model is the thermal attack on concrete by an internally heated, chemically reacting, molten mixture of metals (steel and unoxidized zirconium cladding) and oxides (UO₂ and ZrO₂, predominantly). Two key features of the models that must be validated if confidence is to be placed in the model predictions are the (1) heat transfer from core debris, and (2) heat generation especially that caused by chemical reactions. A third key feature, the release of radionuclides during core debris/concrete interactions, is not explicitly addressed in this paper. 23 refs., 6 figs