KR100621840B1 - Auto cutting apparatus of Control Element Assembly with transportation - Google Patents

Abstract

The present invention relates to a nuclear fuel control rod automatic cutting device equipped with a transfer means, more specifically, a damaged control rod can be continuously cut simultaneously with 4 to 12 fixed to the gripper (Grip), by the transfer means The present invention relates to a nuclear fuel control rod automatic cutting device equipped with a transfer means capable of precisely and accurately moving.

The configuration of the present invention, four to twelve control rods which are lifted together with the upper guide structure assembly in the reactor and transported to the tank, and moved by the first transfer means inside the tank to cut the control rods by the second transfer means A cutting device for putting into a storage can being moved, comprising: a base frame (10) provided between an upper support (3) and a lower support (6) through which the control rods (2) are individually passed; A pair of drive means 20 mounted on the base frame 10 so as to correspond to each other; A plurality of moving members 30 connected to the driving means 20 and slidably moved to each other and through which the control rod 2 passes; Mounted to the moving member 30 at a predetermined interval is characterized in that it includes the same number of cutters 40 as the control rod (2) to cut the control rod (2) at the same time.

Nuclear power, reactor, control rod, cutting device, cylinder, transfer means

Description

Auto cutting apparatus of control element assembly with transportation

1 is a perspective view showing a nuclear fuel control rod automatic cutting device according to the present invention,

2 is a perspective view showing a driving means and a moving member of the automatic cutting device according to the present invention;

3 is an exploded perspective view of a moving member of the automatic cutting device according to the present invention;

Figure 4 is a partially enlarged longitudinal sectional view showing the base frame and the moving member of the automatic cutting device according to the present invention,

5 is a plan view of a nuclear fuel control rod automatic cutting device according to the present invention,

Figure 6 is an exploded perspective view showing the operation of coupling the control rod to the gripper according to the present invention,

7 and 8 are a front view showing the operation process of the transfer can of the nuclear fuel control rod automatic cutting device equipped with a transfer means according to the present invention,

9 is a perspective view of a guide plate according to the present invention,

10 is an exploded perspective view of a portion “A” of FIG. 7;

Figure 11 is a cross-sectional view showing a coupling state of the chain and the first chain fixing member according to the present invention,

FIG. 12 is a perspective view of the portion “C” of FIG. 7;

13 is an exploded perspective view of FIG. 12.

<Description of Symbols for Main Parts of Drawings>

1: Automatic cutting device 2: Control rod

2a: control rod guide 2b: gripper

2c Nut 3: Upper support

4: control rod insertion hole 5: guide tube

6: lower supporter 7: storage can

8: support pillar 10: base frame

11: fixing bracket 12: moving space

15: first chain fixing member 17: the first slider

20: driving means 21, 80: cylinder

22,81: piston 30: moving member

31: guide member 32: through hole

35: moving frame 36: blade support plate

40: cutter 41: first cutter

42: second cutter 50: guide plate

51: first guide rod 60: drive motor

61: drive sprocket 62: driven sprocket

63: first driven shaft 64: sprocket

65a: first drive chain 65b: second drive chain

66: second driven shaft 70: lifting plate

71: second chain fixing member 72: second slider

73: the second guide rod 75: the third slider

76: first cross chain 77: second cross chain

78: transverse sprocket 79: chain fastener

82: first bracket 83: second bracket

84: connecting shaft B: cylinder bracket

G1: 1st Chain Drive Mechanism G2: 2nd Chain Drive Mechanism

H: Chain groove P: Locking pin

The present invention relates to a nuclear fuel control rod automatic cutting device equipped with a transfer means, more specifically, a damaged control rod can be continuously cut simultaneously with 4 to 12 fixed to the gripper (Grip), by the transfer means The present invention relates to a nuclear fuel control rod automatic cutting device equipped with a transfer means capable of precisely and accurately moving.

At present, safety-proven and widely commercialized reactors worldwide include light and heavy water reactors as water cooling reactors. Based on the conditions of use of the fuel given in the reactor core design, the fuel design specifications for each reactor type are drawn up through the structural design including the thermal and mechanical design of the nuclear fuel. One assembly consists of a control element assembly (CEA) that controls the reactivity of several fuel rods and fuel assemblies, and an extension shaft assembly (ESA) that connects the control rods.

Here, the control rod is coupled via a control rod guide tube and a gripper (Griper), the control rod is fixed to the gripper by four, eight, twelve nuts in one gripper, the control rod guide tube is detachably coupled to the upper gripper have.

In addition, the control rod guide tube is fixed to the upper portion of the Upper Guide Structure Assembly (UGSA) and positioned at the inner upper portion of the reactor, and the control rod is arranged perpendicular to the lower portion where the nuclear fuel is stored.

If the control rod is damaged during the operation of the reactor or the end of life, it must be reloaded by replacing it with a new control rod through regular inspection, the process is as follows.

First, the upper guide structure assembly is lifted from the reactor by a lifting means and moved to the water tank, and then the control rod guide tube is separated from the upper guide structure assembly, and the gripper coupled with the control rod is separated from the control rod guide tube.

 Then, a storage can for accommodating the cutter and the cut control rod is placed inside the tank through an elevator that cuts the control rod installed on the inner wall of the tank, and then removes one control rod by releasing the nut from the gripper, The control rod is repeatedly placed in the cutting unit of the cutter by using a towing tool, cut and stored in a storage can, and then a new control rod is reloaded into the gripper and assembled to the upper guide structure assembly to replace the control rod. You are done.

However, in the conventional control rod cutter as described above, the control rod cutter is separated from the gripper one by one, and then the cutting rod has to be positioned and cut in the cutting unit of the cutter using a traction tool. It was very difficult to place the control rod in the cutting unit, which caused the risk that the exposure could be exceeded by a certain level or more under a radioactive environment as the working time was taken for a long time.

In addition, since the cutter and the storage cans are moved by a simple lifting or lowering elevator, it is difficult not only to place the storage cans in the lower part of the cutter, but also the storage cans and the cutter may interfere with each other, so that the upper or lower portions of the tank are individually. There was a difficulty moving to.

In particular, the regular inspection of the nuclear fuel assembly including the control rod cutting operation is performed for about 45 days, and since the reactor cannot be operated during the inspection period, a huge cost loss of about 1 billion per day occurred. There is an urgent need for the development of various devices to shorten the cost.

The present invention was devised to solve the above-mentioned problems, and an object of the present invention is to install an automatic cutting device in which a plurality of cutters are operated at the same time in a tank, so that a damaged fuel control rod transferred from a nuclear reactor is gripped by a gripper. By cutting at the same time continuously with 12 to 12 fixed, cutting time of the control rod is reduced, so that the control rod can be quickly changed while controlling the exposure amount below a certain level in the radioactive environment. The present invention provides a nuclear fuel control rod automatic cutting device equipped with a moving means that can shorten the time to stop the operation of the reactor to perform a regular inspection.

Still another object of the present invention is to provide a nuclear fuel control rod automatic cutting device having an automatic cutting device and a moving means capable of quickly and accurately moving a storage can containing a cut control rod by a moving means installed in a tank and a guide. Is in.

The configuration of the present invention for achieving the above object, the four to twelve control rods are lifted together with the upper guide structure assembly in the reactor and transported to the tank, and moved by the first transfer means inside the tank to cut the control rods In the cutting device to be put into the storage can is moved by the second transfer means, the control rod (2) and the base frame (10) provided between the upper support (3) and the lower support (6) respectively passed through; ; A pair of drive means 20 mounted on the base frame 10 so as to correspond to each other; A plurality of moving members 30 connected to the driving means 20 and slidably moved to each other and through which the control rod 2 passes; Mounted to the moving member 30 at a predetermined interval is characterized in that it includes the same number of cutters 40 as the control rod (2) to cut the control rod (2) at the same time.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

As shown in the drawings, the present invention provides four to twelve control elements (CEA) that are lifted together with an upper guide structure assembly (UGSA) in a nuclear reactor and transferred to a tank (not shown). Assembly 2 and the control rod 2, which is moved by the first transfer means inside the water tank and separated from the upper guide structure assembly UGSA, is automatically inserted into the storage can moved by the second transfer means. It consists of the cutting device 1.

The automatic cutting device 1 is a base frame 10 provided between the upper support 3 and the lower support 6 through which the control rods 2 are individually passed, and on the base frame 10. A plurality of driving means 20 mounted correspondingly to each other, a plurality of moving members 30 connected to the driving means 20 and slidably moved to each other and through which the control rod 2 passes, and the moving member ( 30 is mounted at a predetermined interval is composed of a plurality of cutters 40 for cutting the control rod (2) at the same time.

Here, the automatic cutting device (1) is installed to be movable inside the tank by the first transfer means for cutting the damaged control rod (2), the control rod (2) is a nut to the gripper (Griper, 2b) 4, 8 and 12 are fixed to each other via (2c), and an extension shaft assembly (ESA) 2A fixed to the upper guide structure assembly UGSA is provided on the gripper 2b. After being detachably coupled, only the gripper 2b having 4 to 12 integrally fixed to the control rod 2 is separated from the control rod guide tube 2a, and then using a traction tool (not shown). The cutting is moved to the automatic cutting device (1).

The upper support 3 and the lower support 6 are each formed with a control rod insertion hole 4 so that the control rod 2 can be individually passed, and the control rod insertion hole in the lower portion of the upper support 3 A guide tube 5 communicating with (4) is extended to support the control rod 2 to be vertically positioned.

The upper support 3 and the lower support 6 are respectively fixed to the upper or lower portion of the base frame 10 by fastening means such as a frame and a bolt, respectively. Means 20 are respectively mounted correspondingly.

Here, the drive means 20 is preferably provided with a cylinder unit consisting of a cylinder 21 and a piston 22 so that the external power is applied to linearly move the moving member 30 in the horizontal direction. Fixing brackets 11 are installed at both sides of the upper portion of the base frame 10 so that one side of the driving means 20 may be penetrated and fixed.

The moving member 30 is connected to the driving means 20, respectively, is installed to be movable in a plurality of moving spaces 12 formed in the longitudinal direction on the base frame 10, which is the control rod (2) It consists of a guide member 31 formed with a through hole 32 at a predetermined interval to pass through) and a moving frame 35 that is moved along the guide member 31 and the control rod 2 is passed through.

Each of the guide member 31 and the movable frame 35 is connected to the driving means 20, that is, the piston 22 shaft of the cylinder 21 by a pair of cylinder brackets B, respectively. In the present invention, the guide member 31 and the movable frame 35 is moved at the same time, or the general control that can selectively control the drive means 20 so that only the movable frame 35 can be moved Naturally, the means may be further provided.

", "

"형상으로 구비되는 것이 바람직하며, 상기 이동프레임(35)은 사각틀체에 일정간격으로 칼날지지판(36)이 일체형으로 형성된 격판 형상으로 구비되어 상기 칼날지지판(36) 사이로 상기 제어봉(2)이 통과된다.In addition, both sides of the guide member 31 is supported by the base frame 10, the wall portions on both sides of the movable space portion 12 are each "

","

"It is preferably provided in a shape, the movable frame 35 is provided in a plate shape formed integrally with the blade support plate 36 at a predetermined interval on the rectangular frame body, the control rod (2) passes between the blade support plate (36) do.

The cutter 40, the first cutter 41 formed on the inner circumferential surface of the through hole 32 of the guide member 31 and the first cutter 41 while crossing the first cutter 41 so as to deliver the control rod 2. It is composed of a second cutter 42 mounted at a predetermined interval on the moving frame 35 to cut the control rod 2 inserted into the through hole 32 in the transverse direction.

Here, the first cutter 41 is processed to have a semi-circular shape, and the second cutter 42 formed on one side of the semi-circle corresponding to the blade support plate 36 of the movable frame 35 is interchangeable. ) Is fastened by fastening means such as bolts.

The first transport means for transporting the automatic cutting device 1, the guide plate 50 is fixed to the inner wall surface of the tank and protrudes a plurality of first guide rods 51 in the longitudinal direction, and the guide A first chain drive mechanism G1 connected to the upper and lower portions of the plate 50 and rotating the first driving chain 65a provided with at least one chain row, and fixed to the first driving chain 65a. The first chain fixing member 15 protruding from the base frame 10 and the first chain fixing member 15 to protrude from the base frame 10 at a predetermined interval so as to protrude from the base frame 10. And a plurality of first sliders 17 slid along one side of the upper side 51, so that the automatic cutting device 1 is driven by the driving force of the first chain transmission mechanism G1 and the first driving chain 65a. It is operated to move up or down along the first guide rod 51 formed on the right side of the guide plate 50. Here, the "chain string" means the number of chains of chains connected to a plurality of sprockets provided on the same axis.}

The first chain fixing member 15 is provided in the shape of a rectangular cross section, a plurality of chain grooves 15 are formed on one side to be arranged in parallel at a predetermined interval, the fixing pin (P) can be inserted into both sides thereof. The through hole is penetrated so as to be positioned so that the first driving chain 65a provided with a plurality of chain rows can be passed through the chain groove 15, respectively, and then the first driving chain with the fixing pin P. The first chain fixing member 15 is coupled to the first driving chain 65a by penetrating and fixing 65a.

The second transfer means for moving the storage can 7 is connected to the upper and lower portions of the guide plate 50, the second driving chain (65b) is provided with at least one chain row to rotate the second A plurality of second sliders 72 sliding along a chain drive mechanism G2, a second chain strut member 71 fixed to the second drive chain 65b, and the first guide rod 51; A plurality of second sliders sliding along the other side of the second chain fixing member 71 and the first guide rod 51 fixed to the other side of the plurality of drive chains 65 rotated by the chain transmission mechanism ( 72 is provided on one side, the lifting plate 70 is formed with a plurality of second guide rods 73 in the transverse direction on the other side, and sliding along the second guide rod 73 of the lifting plate 70 A plurality of third sliders 75 fixed to the support pillar 8 provided below the storage can 7 and the lifting plate 70 A plurality of transverse sprockets 78 rotatably arranged on the side and connected to the plurality of first transverse chains 76 and the second transverse chains 77, one side of the transverse sprockets 78 and the third slider ( Transverse chain drive means connected to the chain fastener 79 connected to 75, and the first transverse chain 76 and the second transverse chain 77 to move the storage can 7 in the transverse direction. It consists of.

The second chain fixing member 71 has the same structure as the first chain fixing member 15 described above, and is also coupled to the second driving chain 65b via the fixing pin P to the winch. Steel plate 70 is raised or lowered along the first guide rod 51 formed on the left side of the guide plate 50 by the driving force of the second chain drive mechanism G2 and the second drive chain 65b. do.

In addition, the transverse sprocket 78 is axially rotatably coupled to the upper or lower portion of the elevating plate 70 so as to be located between the pair of the second guide rod (73), respectively the first transverse chain (76) And the second transverse chain 77 are connected, and the chain fixture 79 is welded to the third slider 75 while being coupled to the first transverse chain 76 and the second transverse chain 77. The storage can 7 and the support column 8 are connected to the second guide rod by linearly moving the first transverse chain 76 and the second transverse chain 77 by the transverse chain driving means. 73) to the left or to the right.

Here, the transverse chain drive means, through the first bracket to the first interchain chain 76 so as to reciprocate the first transverse chain 76 and the second transverse chain 77 in a linear direction at the same time. One side is connected to the cylinder 80 and one side is connected to the piston 81 shaft of the cylinder 80, the other side is connected to the second transverse chain 77 via the second bracket (83) ( 84).

On the other hand, the first and second chain drive mechanism (G1, G2) made of the same component, which is provided on the guide plate 50, which is a drive motor 60 having a drive sprocket 61 on one side; A first driven shaft 63 connected to one side of the driven sprocket 62 and a chain connected to the drive sprocket 60 and a lower portion of the guide plate 50 to correspond to the first driven shaft 63. Sprockets 64 provided on the second driven shaft 66, the first driven shaft 63 and the second driven shaft 66, provided with at least one or more so that the drive chain 65 is fastened. The first chain drive mechanism (G1) is a driving force for raising or lowering the automatic cutting device (1), the second chain drive mechanism (G2) is lifting or lowering the storage can (7). To provide the driving force.

The pair of driving motors 60 for elevating or lowering the guide plate 50 and the elevating plate 70 may be provided as forward or reverse rotation motors which may be selectively rotated in a forward direction and a reverse direction. Naturally, the sprocket may be variously designed to transmit the rotational force having a constant speed ratio to the first driving chain 65a and the second driving chain 65b.

Referring to the operation of the present invention configured as described above, in order to check the nuclear fuel assembly of the reactor, the guide plate 50 and the elevating plate 70 is installed on the inner wall of the tank installed inside the building, the guide plate 50 The automatic cutting device 1 is movably mounted, and the storage can 7 is movably mounted to the lifting plate 70 so as to be positioned at the lower portion of the automatic cutting device 1.

If the control rod 2, which absorbs neutrons during the operation of the reactor and controls the rate of the chain reaction, is damaged or at the end of its service life, the upper guide structure assembly (UGSA: Upper) in the reactor for reloading with a new control rod (2). Guide Structure Assembly) is lifted and moved to the tank.

Here, the water tank is a conventional workspace where work can be performed such that no radioactive material is exposed from the upper guide structure assembly.

At this time, the upper guide structure assembly (UGSA) is detachably mounted to the control rod guide tube (ESA) connected to the control rod (2) and the gripper (2b).

In order to reload the control rod 2, the control rod guide tubes 2a are first separated from the upper guide structure assembly UGSA, and then the control rod 2 is coupled to the control rod guide tube 2a. Remove the gripper 2b.

4 to 12 of the control rods 2 are fixed to the gripper 2b with nuts 2c. At this time, the nut 2c is manually disassembled without separating the control rods 2 one by one, as in the prior art. Tow the gripper 2b having four to twelve control rods 2 fixed together with a traction tool (not shown) to control the rods of the upper support 3 and the lower support 6 of the automatic cutting device 1. The control rods 2 are placed in the through holes 32 of the insertion hole 4 and the guide member 31 so as to pass individually.

Subsequently, the automatic cutting device 1 is operated to cut the control rod 2 at the same time. The operation of the automatic cutting device 1 is performed through the following process.

First, an external power source is applied to the driving means 20 provided on one side of the base frame 10, that is, the cylinder unit (cylinder 21 and the piston 22), so that the cylinder bracket B and the moving frame ( Only 35) is advanced in the horizontal direction.

At this time, the moving frame 35 is advanced along the guide member 31, the drive means 20 is connected to the guide member 31 by the cylinder bracket (B) is not driven and maintains the stop state The guide member 31 is supported.

As the movable frame 35 is advanced, the first cutter 41 having the second cutter 42 mounted on the blade support plate 36 of the movable frame 35 is formed in the through hole 32 of the guide member 31. ) And 4 to 12 control rods 2 inserted into the through holes 32 are simultaneously cut.

The impact generated when the control rod 2 is cut off is offset by the driving means 20 to which the guide member 31 is connected to damage the first cutter 41 and the second cutter 42. Is prevented, and the control rod 2 cut by the first cutter 41 and the second cutter 42 naturally falls to the inside of the storage can 7 positioned in the lower portion of the base frame 10. do.

In this way, after the traction tool is lowered step by step to continuously cut the control rod (2), the cut control rod is collected in the storage can (7), the storage can (7) The storage can conveying means is driven to move to the upper side of the tank.

At this time, the storage can 7 is moved in the transverse direction so as not to interfere with the automatic cutting device 1, which retracts the piston 81 of the cylinder 80 to the first inter-chain 76 and the second By rotating the transverse chain 77 in the reverse direction, the storage can 7 and the support pillar 8 can be moved to the left along the second guide rod 73 of the elevating plate 70.

Subsequently, the second chain drive mechanism G2 is driven to raise and lower the storage can 7. That is, when the driving motor 60 installed on the left side of the upper portion of the guide plate 50 is rotated in the reverse direction, the second driving chain 65b is rotated in the upper direction of the guide plate 50 and the first The storage can (7) by lifting up and down along the first guide rod 51 formed on the left side of the guide plate 50 is connected to the elevating plate 70 is connected to the second drive chain (65b) and the second chain fixing member (71) ) And the support pillar 8 can be moved to the upper side of the tank.

Thereafter, the storage can 7 is sealed and then disposed of in a separate place using the traction tool, thereby completing the cutting and discarding of the control rod 2.

On the other hand, by driving the second chain transmission mechanism (G2) to move the automatic cutting device 1 to the upper or lower portion of the guide plate 50, which is a drive provided on the right side of the guide plate 50 When the motor 60 is rotated in the forward or reverse direction, the first driving chain 65a is directed upward or downward of the guide plate 50, whereby the first driving chain 65a and the first chain fixing member ( The automatic cutting device 1 connected by 15 may be lifted or lowered along the first guide rod 51 formed on the right side of the guide plate 50.

In addition, the first cutter 41 and the second cutter 42 for cutting the control rod 2 are fixed to the blade support plate 36 of the movable frame 35 by fastening means, and the guide member 31. ) And the movable frame 35 is coupled to the cylinder bracket (B) as a fastening means, when partial damage occurs, only the damaged part can be used to replace the automatic cutting device (1) semi-permanently. Can be.

As described above, the present invention can continuously cut four to twelve control rods fixed to the gripper at the same time, effectively reducing the cutting time of the control rods and shortening the inspection period, and the main configuration of the automatic cutting device is prefabricated. It can be used to easily replace when the parts are damaged, it is possible to move the automatic cutting device and the storage can accurately by the first transfer means and the second transfer means, it will be referred to as a very useful invention in the industry.

As described above, according to the present invention, by simultaneously cutting the 4 to 12 control rods fixed to the gripper by an automatic cutting device at the same time, the time required for the cutting operation of the control rods is reduced, thereby managing the exposure amount under a certain level in the radioactive environment. While the control rod can be exchanged quickly, in particular, as the cutting operation of the control rod is complicated and time-consuming as in the prior art, there is an effect of reducing the enormous financial loss caused by stopping the operation of the reactor for a long time.

In addition, the storage can for accommodating the automatic cutting device and the cut control rod is quickly and accurately moved inside the tank by the first transfer means and the second transfer means to improve the reliability of use of the device, and the automatic cutting device is prefabricated. It is equipped with an advantage that can be easily replaced when the parts are damaged to reduce the maintenance cost.

Claims (8)

4 to 12 control rods lifted together with the upper guide structure assembly in the reactor and transported to the tank, and are moved by the first transport means inside the tank and cut the control rods into the storage cans moved by the second transport means. In the cutting device to A base frame (10) provided between the upper support (3) and the lower support (6) through which the control rods (2) are respectively passed; A pair of drive means 20 mounted on the base frame 10 so as to correspond to each other; A plurality of moving members 30 connected to the driving means 20 and slidably moved to each other and through which the control rod 2 passes; Nuclear fuel control rod automatically equipped with a transfer means, characterized in that the same number of cutters 40 as the control rod (2) to be mounted to the moving member 30 at a predetermined interval to cut the control rod (2) at the same time Cutting device. The method of claim 1, wherein the moving member 30, The guide member 31 is installed to be movable in the plurality of moving spaces 12 formed in the longitudinal direction on the base frame 10, the through-hole 32 at a predetermined interval so that the control rod (2) can pass through )Wow; Nuclear fuel control rod automatic cutting device with a transfer means, characterized in that consisting of a moving frame 35 is moved along the guide member 31 and the control rod (2) is passed. The method of claim 1 or 2, wherein the cutter 40, A first cutter 41 formed on an inner circumferential surface of the through hole 32 of the guide member 31; Nuclear power provided with a transfer means, characterized in that consisting of a second cutter 42 mounted on the moving frame 35 at a predetermined interval so that the control rod (2) can be delivered while crossing the first cutter (41) Fuel cutting rod automatic cutting device. The method of claim 3, wherein the drive means 20, Nuclear fuel control rod automatic cutting device equipped with a transfer means, characterized in that the cylinder unit driven by an external power source. The method of claim 1, wherein the first transfer means, A guide plate 50 fixed to the inner wall surface of the tank and having a plurality of first guide rods 51 protruding in the longitudinal direction; A first chain drive mechanism G1 connected to an upper portion and a lower portion of the guide plate 50 to rotate the first driving chain 65a provided with at least one chain row; A first chain fixing member 15 protruding from the base frame 10 to be fixed to the first driving chain 65a; The first chain fixing member 15 is formed with a plurality of first sliders 17 protruding from the base frame 10 at a predetermined interval and sliding along one side of the first guide rod 51. Nuclear fuel control rod automatic cutting device equipped with a transfer means. The method of claim 5, wherein the second transfer means for moving the storage can (7), A second chain drive mechanism G2 connected to the upper and lower portions of the guide plate 50 to rotate the second drive chain 65b provided with at least one chain row; A second chain competing member (71) fixed to the second driving chain (65b) and a plurality of second sliders (72) sliding along the first guide rod (51); A plurality of second sliders sliding along the other side of the second chain fixing member 71 and the first guide rod 51 fixed to the other side of the plurality of drive chains 65 rotated by the chain transmission mechanism ( An elevating plate 70 having a plurality of second guide rods 73 formed on one side thereof and having a plurality of second guide rods 73 formed on the other side thereof; A plurality of third sliders 75 sliding along the second guide rods 73 of the elevating plate 70 and fixed to the support pillars 8 provided below the storage can 7; A plurality of transverse sprockets 78 rotatably arranged on both sides of the elevating plate 70 and connected to each of a plurality of first transverse chains 76 and a second transverse chains 77; A chain fixture 79 connected to one side of the transverse sprocket 78 and the third slider 75;  It is connected to move the first inter-chain (76) and the second inter-chain (77) linearly is provided with a conveying means, characterized in that consisting of transverse chain drive means for transporting the storage can (7) in the transverse direction Nuclear fuel control rod automatic cutting device. The driving means as claimed in claim 6, wherein A cylinder (80) having one side connected to the first transverse chain (76) via a first bracket; Transfer means characterized in that one side is connected to the piston 81 shaft of the cylinder 80 and the other side is composed of a connecting shaft 84 connected to the second transverse chain 77 via the second bracket 83. The nuclear fuel control rod automatic cutting device provided. The method of claim 5 or 6, wherein the first and second chain drive mechanism (G1, G2), A driving motor 60 provided on the guide plate 50 and provided with a driving sprocket 61 on one side thereof; A first driven shaft (63) having driven sprockets (62) connected to the drive sprockets (60) in a chain, respectively; A second driven shaft 66 provided below the guide plate 50 so as to correspond to the first driven shaft 63; It is provided on the first driven shaft 63 and the second driven shaft 66, the transport means is provided with a sprocket 64 which is provided with at least one or more so that the drive chain 65 is fastened. Nuclear fuel control rod automatic cutting device.

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