“…The validation matrix that was considered to specifically assess both the ICARE and CESAR lower head models is supplied in Table 3. It should be noted that for the modelling of the corium in the vessel lower head and more particularly of the distribution of chemical species in the different corium phases, ASTEC V2.2 relies through correlations [35] on the extensive work, both experimental [36] and modelling, that has been carried out on the thermochemistry of the corium and capitalized in the NUCLEA database [37] developed at IRSN. As an illustration of these works, results from the FARO test #14 simulation obtained with ASTEC V2.2.0 are indicated in Figure 5.…”