Reactions of uranium oxysulfide with some nonmetals and metals

Conclusions A study was made, using the optical microscopy and x-ray diffraction techniques, of the reactions of uranium oxysulfide with boron, silicon, lanthanum, and yttrium in the temperature range 1000–1700°C. Boron and silicon cannot be employed as reducing agents in the synthesis of uranium monosulfide from uranium oxysulfide. It was established that in the operation of a reactor UOS present in sulfide fuel is a harmful impurity because it reacts with lanthanides forming in the course of fission.Translated from Poroshkovaya Metallurgiya, No. 10(166), pp. 97–100, October, 1976.The author wishes to thank Professor D. Kolar for helpful discussion. He is also most grateful to the Boris Kidri Fund for financing the work.