[en] The current LOCA (Loss of Coolant Accidents) safety criteria are based on experiments conducted in the 70’s. However, fuel environment has evolved leading to new fuel designs, materials and different burnups. This scenario requires checking the criteria validity. Therefore, some experimental campaigns have been launched to investigate the thermo-mechanical response under these new conditions and to assess the predictability of the existing analytical tools. The IAEAFUMAC (Fuel Modeling in Accident Conditions) project is targeted to assess the capability of fuel performance codes when modeling LOCA conditions. The paper covers the assessment of FRAPTRAN capabilities to model the thermal response of the experiments first, which reveals the significance of the plenum characterization for the correct test simulation. Then, the mechanics are evaluated, and promising improvements are achieved, leading to estimates closer to observed data. The results show that, despite the enhancement achieved through input deck and model modifications (large strain deformation), the FRAPTRAN mechanical response to the transients simulated should be still improved. The outcome of the exercise highlights the cladding outer diameter and the base irradiation cladding corrosion model, as the two elements affecting most the mechanical response predicted, although the uncertainties are in no case responsible for the deviations noted with respect to data