Study on Detection Method of Oxygen-Uranium Ratio of UO2-MO Pellets

Abstract

In this paper, the determination method of the atomic ratio of oxygen to uranium in UO2-MO pellets was studied. Through the experiments of UO2-MO pellets with different composition ratios, the results showed that MO in UO2-MO pellets was a stable compound and did not participate in the thermogravimetric reaction. Only uranium dioxide was oxidized into stable uranium trioxide in oxygen. By accurately measuring the net weight of samples after dehydration and the total weight after oxidation, the formula for calculating the oxygen-uranium ratio of UO2-MO pellets is derived by formula derivation, and the RSD of this method is better than 0.13%.