Nuclear power plant construction preparation unit with detection and marking devices ; nuclear power plant construction system with such preparation unit ; nuclear power plant construction method with detection and marking steps

摘要

A nuclear power plant construction preparation unit includes: a device main body (30) which enters into a space; a moving part which causes the device main body (30) to enter into the space; an eddy-current inspection sensor (31) which is provided on the device main body (30), and which detects a target portion of a member surface within the space; a punch marking part (32) which is provided on the device main body (30), and which performs marking on the member surface; and a control part which controls the moving part and the marking device (32) based on detection results from the target portion detection device (31), to thereby perform marking at a relative position with respect to the target portion.