Monte Carlo simulation analysis of integral data measured in the SCK-CEN/ENEA experimental campaign on the TAPIRO fast reactor.Experimental and calculated data comparison.

After Fukushima events, the Italian nuclear program has been redefined leaving space only to activitiesrelated to Generation IV nuclear systems. Accordingly with this renewed national scenario, TAPIRO fast reactor facility is gaining a relatively major strategic role. A program is in fact being proposed to host in TAPIRO benchmark experimental activities related to the development of Lead fast reactor and ADS. A first step of this program would consist on the validation of neutronic codes, crosssection data and reactor models to be adopted for its analysis. Along this line in this work the resultsof a simulation study has been made relevant to the measurements performed in the SCK-CEN/ENEAexperimental campaign. The calculations have been made using theMonte Carlo MCNPX 2.7.0 Code. In this article the main results are presented and discussed, with par-ticular emphasis on the uncertainties, relevant both to nuclear data and the model layout. The results ofthis simulation study indicate in particular that TAPIRO’s MCNPX model is adequate for the optimizationof set-ups of perspective neutron irradiation experiments, this allowing cuts in costs and development time.