Abstract: The invention concerns a device for removing dust from nuclear fuel pellets.The object of the invention is to embody a device able to simply and effectively remove dust from pellets coated with dust, including non-electrically charged dust.This aim is obtained by using a device including a dedusting tube (1) inside which said pellets (35) circulate, said tube (1) being provided at its inlet extremity (2) with a gas injection orifice, an opening for introducing the pellets to be dedusted and means to create a laminar flow of dedusting gas around the pellets circulating in said tube, said tube (1) being further provided at its outlet extremity (4) with a gas and dust suction opening and an opening for recovering the dedusted pellets (35).

Abstract: The invention relates to a process for preparing pieces of solid electrolyte based on stabilized zircon having an improved conductivity due to the addition of Al.sub.2 O.sub.3. According to the process, an alcoholic solution is prepared of a salt of zirconium, a salt of a metal stabilizing zircon such as yttrium and a salt of aluminium; from this solution is formed a coprecipitate of hydroxide of zirconium, hydroxide of said metal and hydroxide of aluminium; the precipitate is washed by means of a hydrophilic solvent to eliminate the traces of water, then is dried and calcined in air; a piece of solid electrolyte is then formed by compression and sintering from the powder obtained.The invention is applicable to the production of solid electrolytes for cell for electrolysis of water vapor or for fuel cell.