Table 1: Uranium density comparison for UO2 and ATF fuel.

Fuel materialUranium density
(g/cm3)
Ref.

UO2 (fully dense)9.66[11]
UO2 (5% porosity)9.18
UN (fully dense)13.55[11]
U3Si2 (fully dense)11.31[11]
U-8Mo (fully dense)16.1[13]
FCM UO2/SiC (55% TRISO packing)1.84[10]
FCM UN/SiC (55% TRISO packing)2.72[10]