NOVELTY - Manufacturing apparatus of fuel particle has fluid bed reactor, gas supply apparatus (A), zirconium halide gas evolution tank (10) having several plates, and flow gas supply unit (B). Apparatus (A) supplies coating gas to reactor, and coating layers (a-d) are formed. Coating layer (c) is zirconium carbide coating layer obtained by thermally decomposing coating gas having zirconium halide gas, methane gas and hydrogen gas. Zirconium halide (12) is loaded in tank (10) by plates. Unit (B) supplies flow gas to zirconium halide in plate from just overhead of each plate.    USE - For manufacturing fuel particles for high-temperature gas cooled reactor used for hydrogen production, chemical processing plant and electric power generation.    ADVANTAGE - The coated fuel particles having zirconium carbide coating layer is economically manufactured using the apparatus.    DETAILED DESCRIPTION - The manufacturing apparatus of fuel particles has a fluid bed reactor, a gas supply apparatus, zirconium halide gas evolution tank (10) having several plates, and a flow gas supply unit. The gas supply apparatus supplies coating gas to the reactor, and coating layers (a-d) are formed. The coating layer (a) functioning as a buffer, which absorbs swelling of fuel particles and gas reservoir of gaseous fission product, is formed at surface of fuel particles, which sintered uranium dioxide. A coating layer (b) having holding function of gaseous fission product, is formed at the surface of layer (a). The coating layer (c) having holding function of solid fission product and functioning as main strengthening component of coating layer, is then formed. The coating layer (d) has holding function of gaseous fission product and functions as protective layer of coating layer (c). The coating layer (c) is zirconium carbide coating layer obtained by thermally decomposing coating gas consisting of zirconium halide gas sublimated by zirconium halide gas evolution tank, methane gas and hydrogen gas. Zirconium halide (12) is loaded in the gas evolution tank by the plates. The flow gas supply unit supplies flow gas to zirconium halide in plate from the just overhead of each plate.    DESCRIPTION OF DRAWING(S) - The figure shows the explanatory drawing of supply apparatus of fuel bed coating gas and flow gas. (Drawing includes non-English language text)    Zirconium halide gas evolution tank (10)    Fluid bed device main portion (11)    Zirconium halide (12)    Heat insulating material (13)    Heater (14)