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inert matrix fuelMiwa, Shuhei; Osaka, Masahiko
Journal of Nuclear Materials, 487, p.1 - 4, 2017/04
Times Cited Count：4 Percentile：36.71(Materials Science, Multidisciplinary)Oxidation and reduction behaviors of prototypic MgO-based inert matrix fuels (IMFs) containing PuO were experimentally investigated by means of thermogravimetry. The oxidation and reduction kinetics of the MgO-PuO specimen were determined. The oxidation and reduction rates of the MgO-PuO were found to be low compared with those of PuO. It is note that the changes in O/Pu ratios of MgO-PuO from stoichiometry were smaller than those of PuO at high oxygen partial pressure. From these results, it can be said that MgO matrix lower the oxygen supply and release of PuO, which is preferable as the minor actinides incineration devices, since the high oxygen potentials of minor actinide oxides can cause certain problems in terms of thermochemical aspects such as enlarged cladding inner-surface corrosion.
inert matrix fuelMiwa, Shuhei; Osaka, Masahiko
no journal, ,
Oxidation and reduction behaviors of a prototypic MgO-based inert matrix fuels (IMF) containing PuO were experimentally investigated by means of thermogravimetry. A dense disk-shaped prototypic MgO-based IMF containing PuO (MgO-PuO) was prepared by a powder metallurgy method. The oxidation and reduction kinetics and oxygen potentials of the MgO-PuO specimen were determined in the temperature range of 1273 K to 1473 K. The oxidation and reduction rates of the MgO-PuO were found to be notably low compared with those of PuO. On the other hand, the oxygen potentials of the MgO-PuO were the same level as those of PuO as a whole. However, it is of note that the oxygen potentials of MgO-PuO were lower than those of PuO near stoichiometry.
