| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for stably manufacturing coated fuel particle having a high-quality coating layer with high closure performance to fission products generated by fission reaction when used in a reactor, in industry scale. SOLUTION: The surface of fuel kernel sintered with uranium oxide is coated with the first low density carbon layer, the second high-density carbon layer, the third SiC layer and the fourth high-density pyrolytic carbon layer in turn in the manufacturing method for coated fuel particle for high-temperature gas-cooled reactor. The first low-density carbon layer is formed in coating conditions of temperature elevation speed of 25°C/minute or less from room temperature to coating temperature, the coating temperature of 1,300 to 1,500°C, coating gas (acetylene) flow rate of 60 to 220 L/min, fluidizing gas (argon) flow rate of 90 to 250 L/min and coating speed of 10μm/min or more in the method. COPYRIGHT: (C)2007,JPO&INPIT
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