Secondary shutdown structure of nuclear reactor by using sliding doors

A secondary shutdown structure of a nuclear reactor, the secondary shutdown structure using a sliding door and comprising:

• a nuclear reactor vessel comprising an upper nuclear reactor vessel and a lower nuclear reactor vessel that are coupled to each other;
• a plurality of guide pipes arranged to be spaced apart from one another among a plurality of nuclear fuel assemblies in the lower nuclear reactor vessel;
• a plurality of storage containers arranged in the upper nuclear reactor vessel to respectively correspond to locations of the plurality of guide pipes, wherein each of the plurality of storage containers has a neutron absorber contained therein and has an outlet opening towards each of the plurality of guide pipes;
• the sliding door provided between the plurality of storage containers and the plurality of guide pipes, the sliding door sliding between an opening location and a closing location and the sliding door having a plurality of through holes communicating with the outlets of the plurality of storage containers at the opening location;
• and
• a driver configured to move the sliding door in a horizontal direction, the driver comprises:
• a body having an accommodation space extending in a direction therein, the body having a coil wound there around and the body opening towards the sliding door;
• a fixed magnet fixedly installed in the accommodation space of the body;
• a movable magnet sliding within the accommodation space of the body, the movable magnet moving towards the fixed magnet by a magnetic force between the fixed magnet and the movable magnet when an electric current is applied to the coil;
• and
• a connector configured to connect the movable magnet to the sliding door,
• wherein the sliding door slides along with the movable magnet by the connector,
• wherein, when the sliding door is at the opening location, the plurality of through holes are aligned with the outlets of the plurality of storage containers and the neutron absorber in each of the plurality of storage containers passes through the through hole to move into each guide pipe, and
• when the sliding door is at the closing location, the outlet of each storage container is closed and the neutron absorber stays in the storage container.