The fuel behaviour code FUROM and its high burn-up simulation capabilities

The code FUROM has been developed for the computational simulation of VVER and PWR fuel behaviour in quasi-static conditions. The applicability and flexibility of the code were ensured in the fields of cladding mechanical response, fission gas release, isotopic content of the fission gas etc. Special attention was given to the validation of the code by using experimental results from international sources. The code is regularly used for the systematic evaluation of the fuel-related safety parameters of Paks NPP. The satisfactory conclusion of this evaluation is a pre-requisite of licensing all modified fuel designs.