[en] This work is part of a project, the aim of which is to provide information on the distribution of fission products in intact irradiated fuel rods, both within the UO₂ fuel and on the inside of the zircaloy clad. Fuel rods, previously irradiated to appreciable burnups in the Aagesta R3 reactor, after cooling, are re-irradiated in the Studsvik R2 test reactor for short periods to build up significant inventories of short-lived fission products of interest. The irradiation conditions are well defined. In this report the results from the ceramographic analyses of the fuel rods are presented together with the beta autoradiography results