Patent Number: 
Section: claims

1. A management equipment transfer apparatus comprising:a cross beam configured to be disposed inside a nuclear reactor vessel and to extend in a first radial direction of the nuclear reactor vessel, the first radial direction being orthogonal to a longitudinal central line of the nuclear reactor vessel;a rod configured to be connected to the cross beam, disposed inside the nuclear reactor vessel, and move in an up and down direction which is parallel to the longitudinal central line of the nuclear reactor vessel;a bracket configured to be mounted to the rod;an arm configured to extend in a second radial direction of the nuclear reactor vessel toward an inner peripheral surface of the nuclear reactor vessel and be connected to the cross beam; andfirst and second rolling parts configured to be disposed at distal ends of the arm and the cross beam, contact the inner peripheral surface of the nuclear reactor vessel, and rotatably support the cross beam and the arm,wherein a rack disposed in the cross beam is coupled with a pinion disposed at the rod to move the bracket in the first radial direction of the nuclear reactor vessel, andwherein the management equipment transfer apparatus transfers management equipment inside the nuclear vessel while being locked to the management equipment and the nuclear vessel. 2. The management equipment transfer apparatus according to claim 1, wherein one or both of the arm and the cross beam are configured to extend and contract in the second and first radial directions, respectively, each of the arm and the cross beam including a cylinder and a piston so as to control an interval between a corresponding one of the first and second rolling parts and the inner peripheral surface of the nuclear reactor vessel. 3. The management equipment transfer apparatus according to claim 2, wherein the second radial direction of the arm intersects the first radial direction of the cross beam. 4. The management equipment transfer apparatus according to claim 1, wherein the rod includes a piston and a cylinder to move in the up and down direction of the nuclear reactor vessel. 5. The management equipment transfer apparatus according to claim 1, wherein the rod is coupled with the bracket by a ball screw or a lead screw to move the bracket in the up and down direction of the nuclear reactor vessel. 6. The management equipment transfer apparatus according to claim 1, wherein each of the first and second rolling parts includes:a roller configured to rotate by being supplied with power; anda wheel configured to rotate by a friction force with a locking jaw of the nuclear reactor vessel when the roller rotates, thereby causing the management equipment transfer apparatus to rotate,wherein the wheel is disposed to contact an upper surface of the locking jaw which is adjacent to an inner side wall, the inner side wall being formed on the inner peripheral surface of the nuclear reactor vessel by protruding from the inner peripheral surface, andwherein the roller is disposed to rotate by contacting the inner side wall. 7. The management equipment transfer apparatus according to claim 1, wherein the arm and the cross beam are hinged with each other to control an angle at a connection point between the arm and the cross beam. 8. The management equipment transfer apparatus according to claim 1, wherein the bracket detachably fixes the management equipment. 9. The management equipment transfer apparatus according to claim 1, further comprising:a first actuator configured to supply power so as to extend and contract the arm or the cross beam;a second actuator configured to supply power so as to move the bracket in the up and down direction of the nuclear reactor vessel; anda third actuator configured to supply a rotating force to the first rolling part or the second rolling part. 10. The management equipment transfer apparatus according to claim 1, wherein the management equipment includes one or both of ultrasonic testing equipment and maintenance equipment. 11. The management equipment transfer apparatus according to claim 1, wherein the nuclear reactor vessel has a cylindrical shape. 12. The management equipment transfer apparatus according to claim 1, wherein the bracket moves substantially only in the first radial direction of the nuclear reactor vessel. 13. A management equipment transfer apparatus comprising:a cross beam configured to be disposed inside a nuclear reactor vessel having a cylindrical shape and to extend in a first radial direction of the nuclear reactor vessel, the first radial direction being orthogonal to a longitudinal direction of the nuclear reactor vessel;a rod connected to the cross beam, the rod being configured to extend in an up and down direction that is parallel to the longitudinal direction of the nuclear reactor vessel;a bracket configured to be mounted to the rod;an arm configured to extend in a second radial direction of the nuclear reactor vessel, the second radial direction being orthogonal to the longitudinal direction of the nuclear reactor vessel, the arm being coupled to the cross beam; andfirst and second rolling parts configured to be disposed at distal ends of the arm and the cross beam, contact an inner side wall of the nuclear reactor vessel, and rotatably support the cross beam and the arm,wherein each of the first and second rolling parts includes:a roller configured to contact the inner side wall of the nuclear reactor vessel and move along the inner side wall in a circumferential direction of the nuclear reactor vessel; anda wheel configured to contact a surface of a locking jaw of the nuclear reactor vessel and move along the surface of the locking jaw in the circumferential direction of the nuclear reactor when an actuator causes the roller to move, thereby causing the management equipment transfer apparatus to rotate, andwherein the inner side wall is adjacent to the surface of the locking jaw and the locking jaw protrudes from the inner side wall. 14. The management equipment transfer apparatus according to claim 13, wherein the inner side wall is perpendicular to the surface of the locking jaw.