Nuclear power plant construction preparation unit, nuclear power plant construction system, and nuclear power plant construction method

摘要

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

主权项

1. A nuclear power plant construction system comprising:
a nuclear power plant construction preparation unit; and a construction unit which performs construction at a welded portion, using a position marked with the nuclear power plant construction preparation unit as a reference, wherein the nuclear power plant construction preparation unit includes: a device main body which enters into a space, the space being surrounded by a tube and a pipe, the tube and the pipe being welded to each other via the welded portion; a moving part which causes the device main body to enter into the space; a target portion detection device which is provided on the device main body, and which detects the welded portion of a member surface within the space; a marking device which is provided on the device main body, and which forms a portion having durability by changing a surface shape on the member surface within the space; and a control part which controls the moving part and the marking device based on detection results from the target portion detection device, to thereby perform marking at a relative position with respect to the welded portion.