Patent ID: 8331522
Filing Date: 2012-12-11
Classification: B23K,B23P,C21D,G21C,Y02E

Abstract:
1. A maintenance/repair device for a reactor internal structure formed of a control-rod drive mechanism housing having a through-hole, for maintaining/repairing a reactor internal structure installed on a bottom of a reactor pressure vessel, the maintenance/repair device for reactor internal structure comprising: a device body configured to be fixed on the reactor internal structure; and a welding-part repair mechanism connected to the device body, the welding-part repair mechanism being configured to repair a welding part of the reactor internal structure, wherein a welding part of the reactor internal structure is repaired by the welding-part repair mechanism, while the device body is fixed on the reactor internal structure, the device body comprising: a frame to which the welding-part repair mechanism is connected; a guide connected to the frame and configured to be fitted to the through-hole in the control-rod drive mechanism housing for insertion into the through-hole; and a clamp mechanism disposed in the guide and configured to fix the device body on the control-rod drive mechanism housing, and wherein the clamp mechanism includes pads projecting outward of the guide so as to be pressed onto an inner surface of the control-rod drive mechanism housing when the device body is fixed on the control-rod drive mechanism housing.