PEBBLE-BED TYPE FUEL FOR HIGH-TEMPERATURE GAS-COOLED REACTOR AND ITS MANUFACTURING METHOD

摘要

PPROBLEM TO BE SOLVED: To provide pebble-bed type fuel capable of improving closure function of fission product, ensuring high safety and responding to increasing burnup. PSOLUTION: The pebble-bed type fuel for high temperature gas-cooled reactors is formed with spherical core having dispersed coated fuel particles in a mother material of graphite and an outer shell graphite layer on the outer surface. In between the spherical core and the outer shell layer, one or more intermediate coat layers formed on the surface of the spherical core are provided in the constitution. PCOPYRIGHT: (C)2005,JPO&NCIPI