Thorium Ceramics Data Manual. Volume I. Oxides.

Prediction of oxygen potential in americium thorium oxides phase of a cermet fuel

“…Many elements present in the fuel matrix phase can, thus, be categorized into a few elemental groups in terms of their oxygen potentials. The fuel matrix phase is, thus, assumed to consist of the following eight elemental groups, as shown in Table 3 [41,42]; i.e., U, Pu, Am, RE, Eu, Ce, Zr and Th. The fraction of each elemental group is the sum of fractions of the included elements.…”

“…25 , whose thermodynamic data have been obtained [24,42], and a newly introduced first term interaction between [PuO 2 ] and [ThO 2 ] were considered. The gas-solid reaction for the system is the same as Reaction {1}.…”

Pyrometallurgical separation of uranium from (Th,U)02 solid solutions

“…Because of its importance as a nuclear fuel, this system has been studied extensively (8,17 (31) were studied at this laboratory, but the existence of lower chlorides could not be definitely proved.…”

“…can be combined to give 1/4 Th + 3/4 ThCl^ + UO^ ThOg + UCI3 (8) Several experiments were done to study Reaction 8, and the details are given in Table 14. The results indicate that the amount of thorium used is rather critical.…”

“…However the recent trend is towards ceramic fuel and con siderable work has been done on the oxide fuels (8). Most of the breeder reactors are being planned for an oxide fuel con sisting of UOg dissolved in Th02.…”