b'Figure 2. Comparison of between antheoretical density (%TD) and graingrain growth [4]. To that end, CO 2was undoped UO 2sintered for 12 hourssizes ranging between 9.7-19.6 mchosen as the oxidizing atmosphere. under CO 2(a) with a 0.05 wt% Cr 2 O 3 depending on the sintering atmo- The pellet sintered under CO 2for 4 doped UO 2sintered under H 2+ 1 vol% H 2 O from [2] (b). sphere. The standard average grain sizehours has an average grain size of 19.6 in light water reactor fuel is between 10.2 m, which is comparable to 10-12 m [1] and the sinteringthat of TiO 2doped UO 2fuel (~18temperature ranges between 170017 m) [5-6]. The sinterability of UO 2C to 1800C in a slightly oxidizingcompacts has been found to depend atmosphere. It is understood in theupon four main factors: sintering literature that an oxidizing atmospheretime, the characteristics of the starting introduces defects into the UO 2 UO 2powder, time sintering tempera-crystalline lattice, thus improvingture and the sintering atmosphere. In this study it has been shown that 56 2020|AFC ACCOMPLISHMENTS'