Nitridation of dysprosium and gadolinium dissolved in liquid cadmium

Sato, Takumi  ; Hayashi, Hirokazu 

Nitride formation reactions of 2 wt% Dy-Cd and 2 wt% Gd-Cd alloys in N gas stream have been studied using an apparatus developed for 100 g-Cd scale nitridation tests in order to obtain experimental data required to design industrial scale equipment of pyrochemical reprocessing of MA transmutation nitride fuel. Dy and Gd were used as surrogate materials of MAs and Pu. Most of Dy and Gd dissolved in Cd were converted to DyN and GdN at 1073 K, respectively. By additional heating of the products, Cd concentration deceased to 0.065-0.12 wt%, and recovery yield of Cd was 100%.