Device for assembling and disassembling top nozzle of nuclear fuel assembly

A device for assembling and disassembling a top nozzle of a nuclear fuel assembly, the device comprising:

• a pedestal including a threaded hole formed through the pedestal;
• a screw bar configured to move forward and backward through the threaded hole to reciprocate in a straight line;
• a housing coupled with a first end of the screw bar;
• a bearing provided between the housing and the screw bar such that the housing is not interlocked with the screw bar;
• a top nozzle plate configured to be detachably coupled to the housing and to push or pull the top nozzle of the nuclear fuel assembly, wherein the nuclear fuel assembly contains a plurality of fuel rods thereinside;
• and
• a load cell provided between the top nozzle plate and the housing to measure a load value applied to the top nozzle plate when the top nozzle plate pushes and pulls the top nozzle of the nuclear fuel assembly.