LARGE POWER REACTOR

摘要

PURPOSE: A large power reactor is provided to prevent interference between a control rod and a measuring unit by simplify forming a pattern of a control rod assembly mounted on a nuclear fuel assembly. CONSTITUTION: A reactor container includes a nuclear fuel assembly(111) in a reactor core. A nuclear fuel rod(111a) is arranged in the nuclear fuel assembly in plural rows and columns. A measuring unit guide tube(111c) is formed in the center of the nuclear fuel assembly to mount the measuring unit. Eight control rod guide tubes(111b) are arranged around the measuring unit guide tube. The nuclear fuel rod is arranged in the area except the control rod guide tube and the measuring unit guide tube.