INSPECTING DEVICE FOR FLANGE SURFACE OF REACTOR VESSEL

PURPOSE:To reduce radiation exposure in inspection, to eliminate the individual difference of the inspection, and to prevent an inspection place from being overlooked by providing a carriage where a television camera and a lighting source are mounted, a driving mechanism, a driving controller, etc. CONSTITUTION:The carriage 1 where the television camera 6 and lighting source 7 are mounted, the driving mechanism 4, the driving controller 15, etc., are provided. The light source 7 is turned on to confirm the image of the camera 6 on an image receiver 12 and then the controller 15 controls the mechanism 4 remotely to rotate driving wheels 2. Consequently, the carriage 1 moves along a flange surface through a guide wheel 3 while the flange surface is photographed by the camera 6. At this time, the movement distance of the carriage 1 is measured by an encoder 5 and displayed on a counter 16 from the angle from a base point. Thus, the carriage 1 is installed on the flange surface and controlled remotedly thereafter, so the exposure of an inspector is reducible. The image of the camera 6 is projected on the receiver 12 and checked visually by plural persons, so the individual difference is eliminated and the inspection position is prevented from being overlooked.