Patent ID: 9205507
Filing Date: 2015-12-08
Classification: B23K,B25J,G21C,Y02E

Abstract:
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.