Monte Carlo analysis of KRITZ-2 critical benchmarks on the reactivity temperature coefficient using ENDF/B-VII.1 and JENDL-4.0 nuclear data libraries

•A set of KRITZ-2 experiments with UO2 and MOX LWR lattices, at room and elevated temperatures, have been analysed using the MCNP6.1 code with the libraries: JENDL-4 and ENDF/B-VII.1.•The detailed comparisons of the calculations and measurements demonstrate a good agreement between calculations and measurements.•To investigate better the influence of cross sections differences on the reactivity temperature coefficient, we break it down into its components using a pin cell model.