| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas introduction nozzle for coated fuel particle manufacturing equipment for a high-temperature gas-cooled reactor which is stabler and more uniform in supply of coating material gas into a reaction vessel than conventional ones. SOLUTION: The gas introduction nozzle, with which a material gas is discharged and supplied into the reaction vessel containing uranium-dioxide fuel particles and fuel particles are fluidized to coat particle surfaces with an evaporation layer of coating material molecules by heating with thermal decomposition reaction, is provided with a tray-like nozzle body coupled in the bottom of the reaction vessel and constituting at least a part of vessel bottom center, a gas introduction path penetrating the body and opening to the vessel bottom and a cylindrical gas-inflow piece penetrating through the end of a gas-supply pipe extending from a coating material gas outside the reaction vessel to the reaction vessel on the back of the nozzle body in a state of coupling to the reaction vessel bottom for supplying the coating material gas. The gas introduction path is branched from one gas-inflow piece into a plurality and open to predetermined dispersion position on the vessel bottom. COPYRIGHT: (C)2006,JPO&NCIPI |
