Patent ID: 8535579
Filing Date: 2013-09-17
Classification: B01J,C01F,C01G,G21C,Y02E

Abstract:
1. Method for the production of spherical fuel or breeder material particles from an oxide consisting of the heavy metals uranium and plutonium, the method comprising the steps of: producing a starting solution of nitrates of the heavy metals, adding a first reagent from the group of urea and/or ammonium carbonate and/or ammonium hydrogen carbonate and/or ammonium cyanate and/or biuret, adding at least one second reagent comprising PVA and THFA in order to adjust the viscosity of the solution, transforming the solution into droplets to form microspherules, solidifying the microspherules, at least in a surface region, in an atmosphere containing ammonia, collecting the microspherules in a solution containing ammonia and subsequent rinsing, drying and thermal treatment, characterized in that: the first reagent of the starting solution is added at room temperature and the solution thus prepared is heated to a temperature T where 80° C.≦T<T