Exploring a surrogate of Pellet–Cladding interaction: Characterization and oxidation behavior

Abstract The present work analyzes the effect of different Zr contents on microstructure and thermal behavior non-irradiated UO 2 . A set Zr-doped (0, 20, 40, 80, 100 wt%) pellets was prepared via solid-state synthesis by mimicking chemical bonding between ZrO After sintering, monoliths were characterized scanning electron microscopy, Raman spectroscopy, X-ray diffraction. Oxidation samples has been monitored thermogravimetric analysis. Results under air low oxygen partial pressure show a profound delayed oxidation with addition to then an increased resistance U 3 O 8 when compared pure pellet. Graphical abstract