Process and apparatus for coating fuel fertile or absorber material containing particles for high temperature fuel elements
AssigneeHOBEG Hochtemperaturreaktor-Brennelement GmbH
InventorsHans Huschka, Wolfgang Warzawa
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Abstract
Fuel, fertile material or absorber material containing particles for high temperature fuel elements are coated in a fluidized bed by heating the particles and fluidizing through carrier gas preheated to the desired temperature. The coating gas, having a higher velocity than the carrier gas causing fluidizing, is blown into the fluidized particle bed from one or more nozzles from above counter to the flow of the carrier gas. The nozzles end above the fluidized layer.
Claims9
A process for coating particles of a member of the group consisting of uranium oxide, uranium carbide, thorium oxide, thorium carbide, plutonium oxide, plutonium carbide, boron carbide, boronated graphite, hafnium carbide, gadolinium oxide, samarium oxide and europium oxide particles for use in a high-temperature fuel element of a nuclear reactor in a fluidized bed comprising heating the particles and fluidizing the particles with preheated inert carrier gas blown upwardly through the particles and injecting coating gas at a higher velocity than the carrier gas above the fluidized bed and passing the coating gas downwardly in counter flow to the carrier gas through the fluidized-particle bed to deposit said coating gas by pyrolytic decomposition.
Dependencies are inferred from the claim text.