Kar, A. S.; Rao, A.; Sahu, M.; Kumar, S. S.; Tomar, B. S. (RACD)
Source
Journal of Radioanalytical and Nuclear Chemistry, 2017. Vol. 314 (3): pp. 1664-1674
ABSTRACT
Plutonium recovery is inevitable from plutonium bearing alumina crucibles generated over the years as part of carbon analysis during chemical quality control of nuclear fuels. This is a challenging task owing to the complex nature of matrix. The first stage of methodology development of plutonium recovery involved usage of CeO2 bearing crucibles. Cerium distribution in alumina crucible was investigated by examination of surface morphology. Various aqueous recovery routes were tested initially with CeO2 bearing crucibles and 4 M HF–8 M HNO3–NH4NO3 was found to be most promising (60% recovery). The same route yielded 90% plutonium recovery from alumina crucibles.