Abstract: The present invention relates to a maintenance management system of a passenger transfer device and provides the maintenance management system of a passenger transfer device, the system including: a failure diagnosis server for collecting and storing error code information of the passenger transfer device from a passenger transfer device control panel and diagnosing a failure cause on the basis of the collected error code information; and a repairment terminal for accessing the failure diagnosis server to receive the error code information stored in the failure diagnosis server and a diagnosis result with respect to at least one failure cause and displaying same.

Abstract: Provided is an apparatus for measuring dimensions of a spacer grid for nuclear fuel assemblies. The apparatus includes a fixing unit fixed to a measuring table placed on a floor and kept insulated from vibrations caused by external force, a measuring unit mounted on the fixing unit and configured so that measuring members are installed on both sides of a rectangular spacer grid and move in forward and backward directions by cylinders while grasping the both sides of the spacer grid, and measure abnormalities in the both sides of the spacer grid, and a displacement measuring unit mounted on one side of the measuring unit and sending the measured abnormalities in the both sides of the spacer grid to the outside.

Abstract: Provided is an apparatus for measuring dimensions of a spacer grid for nuclear fuel assemblies. The apparatus includes a fixing unit fixed to a measuring table placed on a floor and kept insulated from vibrations caused by external force, a measuring unit mounted on the fixing unit and configured so that measuring members are installed on both sides of a rectangular spacer grid and move in forward and backward directions by cylinders while grasping the both sides of the spacer grid, and measure abnormalities in the both sides of the spacer grid, and a displacement measuring unit mounted on one side of the measuring unit and sending the measured abnormalities in the both sides of the spacer grid to the outside.