AMMONIUM DIURANATE PARTICLE CONTAINING GADOLINIUM AND MANUFACTURING METHOD THEREOF, FUEL KERNEL FOR HIGH-TEMPERATURE GAS-COOLED REACTOR FUEL, COATED PARTICLE FOR HIGH-TEMPERATURE GAS-COOLED REACTOR, AND HIGH-TEMPERATURE GAS-COOLED REACTOR FUEL

摘要

PPROBLEM TO BE SOLVED: To provide a high-temperature gas-cooled reactor fuel for adjusting neutron flux during combustion for increasing the combustion efficiency in the reactor core of the high-temperature gas-cooled reactor and extending its lifetime; to provide an ammonium diuranate particle that becomes the raw material of the fuel, a fuel kernel, and a coated particle; and to provide a manufacturing method of the ammonium diuranate particle. PSOLUTION: The manufacturing method of the ammonium diuranate particle containing gadolinium gives: the ammonium diuranate particle containing gadolinium for a high-temperature gas-cooled reactor fuel where gadolinium is dispersed uniformly in the particle; the fuel kernel that is a uranium dioxide containing gadolinium obtained by baking the ammonium diuranate particle; the coated particle for the high-temperature gas-cooled reactor fuel where the fuel kernel is coated with a thermal decomposition carbon layer, a silicon carbide layer, or the like; the fabricated high-temperature gas-cooled reactor fuel after the coated particle is overcoated by a graphite matrix material; and the ammonium diuranate particle containing gadolinium by dripping a uniformly mixed solution drop of uranyl nitrate and gadolinium nitrate into an ammonium solution. PCOPYRIGHT: (C)2007,JPO&INPIT