UO2(NO3)2, Gd(NO3)3 and Ca(OH)2 were adopted as the initial
experimental materials in this paper. UO2-10 wt% Gd2O3 fuel with
different contents of CaO (the mass fraction of 0, 0.3%, 0.5% and
0.6%, respectively) were prepared by co-precipitation reaction
method and sintered in different sintering process conditions. The
paper studied the effects of sintering temperatures and CaO contents
on the sintered density, densification dynamics, grain sizes
and crushing strength. In addition, its microstructure and phase
structure were analyzed. The research results provided technological
base for the preparation and application of CaO-doped UO2-
10 wt% Gd2O3 burnable poison fuel with high burn-up and inherent
safety for advanced nuclear power use.