KR200367076Y1 - atomic reactor nuclear fuel control unit inspection apparatus - Google Patents

Abstract

The present invention relates to a nuclear reactor fuel control rod inspection device for visually monitoring the fuel control rods in the reactor fuel control rod storage place that stores the fuel control rod assembly for raising and lowering the fuel in accordance with the combustion state of the fuel in the reactor, more specifically, a predetermined size A receiving space is formed and the body is opened and closed by a lid bolted; Moving means of the body coupled to the left and right side walls of the body to move the body; A camera embedded in a casing formed in a longitudinal direction to collect image information of the front of the body, coupled to an upper portion of the body by a holder, and having a lens disposed in front of the casing; Left and right rotating means for rotating the camera at a predetermined angle in left and right directions; Vertical rotation means of the camera for rotating the camera at a predetermined angle up and down; A control unit configured to supply power of the power supply unit to the moving means of the body, the left and right rotating means of the camera, the up and down rotating means of the camera, and the camera, and to control each component by wire; And a display unit configured to display image information transmitted to the camera.

Therefore, the operator can remotely control the inspection device at the storage location where the fuel control rod is collected without the operator wearing the radiation resistance in the reactor fuel control rod storage location, which is a hazardous radiation area. It provides a reactor fuel control rod inspection device that ensures the safety of the operator and visually inspects the damage and corrosion caused by the high temperature of the fuel control rods so that they can be efficiently maintained by proper replacement and repair times. .

Description

Reactor fuel control rod inspection apparatus

The present invention relates to a reactor fuel control rod inspection device for visually monitoring fuel control rods at a fuel control rod storage location in which a fuel control rod assembly is stored, which raises and lowers fuel according to the combustion state of the fuel in the reactor. Safety of the operator by remotely controlling the inspection device in the storage location where the fuel control rods are collected without the operator wearing the radiation resistance in the fuel control rod storage location. In addition, the present invention relates to a reactor fuel control rod inspection device for visually inspecting the degree of damage and corrosion caused by high temperature of the fuel control rod to ensure efficient maintenance by proper replacement and repair time.

In general, nuclear fuel in a reactor building is submerged in a tank in conjunction with fuel control rods.

As described above, the nuclear fuel is raised or lowered by the lowering and lowering of the fuel control rod depending on the combustion state.

The fuel control rod 1 shown in FIG. 1, which combines nuclear fuel, may be damaged by a nuclear fuel that is corroded or burned at a high temperature by the end 1a of the fuel control rod 1 due to the combustion and prolonged use of the nuclear fuel. Done.

The fuel control rods as described above are collected in the UGS (UPPER GUIDE STRUCTURE) in the reactor, and the UGS has a rectangular size of about 5M × 5M, to check for corrosion and damage to the tip 1a of these fuel control rods 1. In the prior art, there was only a visual inspection and a visual identification method.

That is, the operator must enter the fuel guide rod storage place while inspecting the fuel control rod 1 while wearing the radiation resistance. Although the radiation resistance described above is made of a radiation resistant material, the radiation control is affected by radiation when exposed to radiation for a long time, so that a limited number of workers must inspect the fuel control rod 1 alternately within a limited time. This has a delayed problem.

The present invention devised to solve the above problems is that the operator does not directly enter the UGS (UPPER GUIDE STRUCTURE) to inspect the fuel control rod, the movable inspection device is to photograph the state of the fuel control rod in the UGS (UPPER GUIDE STRUCTURE) Displaying image information outside the reactor building provides the purpose to inspect the inside of the UGS (UPPER GUIDE STRUCTURE) from the outside.

1 is a view showing a fuel control rod.

Figure 2 is a view showing one side of the body of the inspection device according to the present invention.

Figure 3 is a view showing a body cross-sectional view of the inspection device according to the present invention.

Figure 4 is a view showing the other side cross-section of the body of the inspection apparatus according to the present invention.

5 is a block diagram showing a schematic configuration of an inspection apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

101: body 102: camera

103: holder 104: power supply

105: control unit 106: display unit

107: drive sprocket 108: interlock sprocket

109: infinitely orbit 110: first axis of rotation

111: moving motor 112: reducer

113: bushing 114: second rotating shaft

115: rack 116: first piston rod

117: first pneumatic cylinder 118: second piston rod

119: second pneumatic cylinder 120: gripping portion

121: coupling portion 122, 123: first, second hinge hole

124: hinge shaft 125: drive gear

126: interlocking gear 127: input device

In the reactor fuel control rod inspection apparatus for visually monitoring the fuel control rod (1) in the reactor fuel control rod storage place where the assembly of fuel control rods (1) for raising and lowering the fuel in accordance with the fuel combustion state in the reactor is stored. A body 101 having a predetermined size receiving space formed therein and having the lid 101a bolted to open and close; A moving means of the body coupled to the left and right side walls of the body 101 to move the body 101; It is embedded in a casing (102a) formed in the longitudinal direction to collect the image information in front of the body 101, is coupled to the upper portion of the body 101 by a holder 103, the lens 102b in front of the casing (102a) The camera 102 is disposed; Left and right rotation means of the camera for rotating the camera 102 at a predetermined angle in left and right directions; Vertical rotation means of the camera for rotating the camera 102 at an upper and lower predetermined angle; A control unit 105 for supplying power of the power supply unit 104 to the moving means of the body, the left and right rotating means of the camera, the up and down rotating means of the camera, and the camera 102, and control each component by wire; A reactor fuel control rod inspection device including a display unit 106 adapted to display image information transmitted to the camera 102 is achieved.

And, the moving means of the body, the drive sprocket 107 is rotatably coupled to both side walls (101b) (101c) of the body (101); An interlocking sprocket (108) coupled to the drive sprocket (107) so as to be rotatable at a predetermined position on both side walls (101b) (101c) spaced apart from the predetermined distance; An endless track 109 which is connected to engage with the outer ring of the drive sprocket 107 and the interlock sprocket 108; The body 101 includes a moving motor 111 for rotating the first rotation shaft 110 of the drive sprocket 107 protruding into both side walls (101b) 101c.

In addition, an output shaft (not shown) is coupled to the first rotating shaft 110 inside the body 101 to reduce the rotational speed of the moving motor 111 and the first driving shaft of the moving motor 111 (not shown). It is preferable to further include a reducer 112 coupled to the input shaft (not shown).

Then, the left and right pivot means of the camera is rotatably inserted into the bushing 113 of a predetermined height protruding from the bottom surface of the body 101, the pinion (114a) on the outer diameter surface protruding above the bushing 113. Is formed, the upper end and the second rotary shaft 114 is coupled to a predetermined position of the holder 103; A linear rack 115 engaged with the pinion 114a of the second rotary shaft 114; A first piston rod 116 is coupled to the end of the rack 115 to include a first pneumatic cylinder 117 to linearly reciprocate the rack 115.

In addition, the vertical rotation means of the camera, the second pneumatic cylinder 118 which is installed on the bottom surface of the body 101 so that the second piston rod 118 is raised and lowered while penetrating the lid (101a); A gripping portion 120 coupled to an upper end of the second piston rod 118 and having a circular gripping groove 120a connected to an outer circumferential surface thereof; A coupling portion 121 which is externally wound at a predetermined position below the holder 103, and has a circular coupling protrusion 121a inserted into the gripping groove 120a in association with an outer diameter surface thereof; The holder 103 is pivoted up and down on the second rotary shaft 114 by being inserted into the first hinge hole 122 formed in the lower portion of the holder 103 and the second hinge hole 123 formed on the second rotary shaft 114. It includes a hinge axis 124 to enable.

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to FIGS. 2 to 4.

First, as shown in FIG. 2, the moving means of the body 101 of the inspection apparatus according to the present invention has a predetermined receiving space defined on both sides of the recessed portion 101d recessed to a predetermined depth. Since the first rotating shaft 110 of the driving sprocket 107 is rotatably coupled to each side wall of the receiving portion, the bushing is typically coupled to the rotating shaft, and thus the detailed description thereof will be omitted.

In addition, both side walls 101b and 101c spaced apart from the driving sprocket 107 coupled to both side walls 101b and 101c of the body 101 by a predetermined distance, as shown in FIGS. 2 and 3. 108 is rotatably coupled, the drive sprocket 107 and the interlock sprocket 108, as shown in the endless track 109 (chain) is enclosed, the endless track 109 by the rotation of the drive sprocket 107 And the interlock sprocket 108 is rotated to allow the body 101 to move forward. Here, 108a shown in the figure is a conventional tension control device for adjusting the tension of the crawler 109.

In addition, the rotating shaft (not shown) of the moving motor 111 is coupled to the end of the first rotating shaft 110 of the driving sprocket 107 protruding into the body 101, so that the rotational force of the moving motor 111 is zero. By being transmitted to the drive sprocket 107 through the one rotation shaft 110, the crawler 109 can be rotated.

On the other hand, since the drive sprocket 107, the interlock sprocket 108, the endless track 109, the moving motor 111 are respectively installed on both sides, the components constituting the moving means on both sides by the control unit 105 to be described later Each can be controlled to enable forward and backward movement and control toward the front, rear, left and right directions.

Here, the rotational speed (not shown) of the moving motor 111 and the shaft end of the first rotating shaft 110 to be coupled to the reduction gear 112 so that the rotational speed of the moving motor 111 that rotates relatively high speed is reduced It is to be delivered to the drive sprocket 107 in a controlled state to enable easy control, and the reducer 112 may be variously adopted according to the reduction ratio, and the present invention does not limit this.

In addition, the coupling structure of the reducer 112, the moving motor 111, and the drive sprocket 107 shown in Figure 3 is directly connected to the rotation shaft (not shown) of the moving motor 111 to the input shaft of the reducer 112 The drive shaft 125 is coupled to the output shaft of the reduction gear 112 and the interlocking gear 126 meshed with the drive gear 125 is configured to be coupled to the first rotation shaft 110. 3 is to be understood as showing one embodiment.

On the other hand, the camera 102 to collect the image information in front of the body 101 is embedded in a casing (102a) formed in the longitudinal direction, the casing (102a) is coupled with the holder 103 and the holder 103 is Located above the depression 101d of the body 101, it is coupled to the top of the body 101 by a holder 103 of the bottom surface of the body 101, and protrudes to a predetermined height on the bottom surface of the body 101. It is coupled to the upper end of the second rotary shaft 114 is inserted into the bushing 113.

Here, referring to the left and right rotation means of the subject innovation camera 102, as shown in Figure 4 the pinion (114a) is formed on the lower portion of the second rotating shaft 114, the rack (on the pinion 114a) As the 115 is engaged, the rack 115 is coupled to the end of the first piston rod 116 of the first pneumatic cylinder 117 so that the first piston rod 116 reciprocates the first pneumatic cylinder 117. As the pinion 114a engaged to the rack 115 is rotated left and right, the holder 103 and the camera 102 coupled to the upper end of the second rotation shaft 114 can be rotated.

Meanwhile, the vertical rotation means of the camera 102 according to the present invention shows the second pneumatic cylinder 118 on the bottom surface of the body 101 so that the second piston rod 118 moves up and down while passing through the lid 101a. It is installed as 4, the end of the second piston rod 118 is coupled to the grip portion 120 of the disc shape, the circular grip groove (120a) is formed on the outer peripheral surface of the grip portion 120 is connected In the lower part of the holder 103, a circular coupling protrusion 121a is coupled to the outer diameter surface of the coupling portion 121, and the coupling protrusion 121a is inserted into the gripping groove 120a of the grip portion 120. You have a structure.

In addition, the connecting portion to which the holder 103 and the second rotary shaft 114 are connected to form a first hinge hole 122 at the lower end of the holder 103, as shown in FIG. 4, and the upper portion of the second rotary shaft 114. The second hinge hole 123 is formed therein, and the hinge shaft 124 is inserted into the first and second hinge holes 122 and 123, thereby forming the upper portion of the second rotating shaft 114 around the hinge shaft 124. The holder 103 and the casing 102a of the can be rotated.

On the other hand, according to the present invention, the moving means of the body, the left and right rotating means of the camera, and the up and down rotating means of the camera are controlled remotely from the outside of the reactor, and the camera 102 and the pair of moving motors 111 are powered. Control unit 105 for supplying power to the supply unit 104, and wired to each component to control the shooting and imaging of the camera 102, the change of direction and forward and backward by supplying and cutting off the power from a remote location ) Is provided.

The control unit 105 includes a conventional input device (keyboard, mouse, stick, etc.), and the image information photographed (collected) from the camera 102 is transferred to the display unit 106 and displayed so that the operator can operate the reactor. It is possible to check the internal state by controlling the body 101 and the camera 102 from the outside.

As described above, the body 101 on which the camera 102 is mounted is disposed on the UGU (UPPER GUIDE STRUCTURE) and the left and right moving motors 111 are formed using the input device 127 of the control unit 105 outside the reactor connected by wire. It controls the power supply and forward and reverse rotation of the directional power and forward and backward, and the camera 102 of the moving body 101 is the display unit by wires through the cable image information taken (collected) by the camera 102 By transmitting to the 106, and displayed on the display unit 106, the operator can inspect the state of the bottom of the fuel control rod (1).

At this time, in order to rotate the camera 102 to the left and right by a predetermined angle, the first pneumatic cylinder 117 is filled with air, and the first piston rod 116 and the rack 115 move forward to rotate the pinion 114a. By rotating the two-rotation shaft 114 and the holder 103 and the camera 102, the fuel rods within the predetermined angle range can be visually identified even in the stopped state.

At this time, the casing (102a) as shown in Figure 3, the front side is elevated upwards, but the back side of the casing (102a) is lowered from the recessed portion 101d around the holder 103, the lower portion of the holder 103 The coupling protrusion 121a of the coupling portion 121 is rotatable along the gripping groove 120a or inserted into the gripping groove 120a of the gripping portion 120, and is always rotated at any angle even when the holder 103 is rotated. Will remain coupled.

Therefore, even when the holding part 120 coupled to the second piston rod 118 is lowered by filling air in the second pneumatic cylinder 118, the coupling protrusion 121a is held by the holding groove 120a as shown in FIG. Will remain attached to the.

Here, if the casing 102a, the camera 102 and the holder 103 are spaced a predetermined distance above the lid 101a of the body 101, the casing 102a, the camera 102 and the holder 103 Is rotated up and down by holding the grip portion 120 even when rotated at a predetermined angle, so that the camera 102 can be rotated up and down about the second rotary shaft 114, as shown in Figs. Since 102a and the holder 103 have a structure coupled in the recessed portion 101d, as shown in the drawing, after the left and right rotation, the up and down rotation is impossible, but this is only one embodiment according to the present invention. The present invention is not limited thereto.

In addition, the casing 102a, the camera 102, the moving motor 111, the first and the second pneumatic cylinder 118 according to the present invention, of course, made of radiation-resistant series, but not the radiation-resistant series The purpose of is not limited because it can be achieved.

As described above, the present invention puts the inspection device in the fuel control rod storage (UGS) to inspect the end of the fuel control rod to control the nuclear fuel in the reactor building, and the moving means of the apparatus and the top and bottom of the camera. By controlling the rotation means and the left and right rotation means through a control unit located outside the reactor building, the operator does not have to visually identify the inside of the UGS (UPPER GUIDE STRUCTURE) by wearing the radioactive clothing, thereby preventing the worker from being harmed from the radiation. Has an effect.

Claims (5)

In the reactor fuel control rod inspection apparatus for visually monitoring the fuel control rods in the reactor fuel control rod storage place that stores the fuel control rod assembly for raising and lowering the fuel in accordance with the fuel combustion state in the reactor, A receiving body having a predetermined size is formed and the lid is bolted to open and close; Moving means of the body coupled to the left and right side walls of the body to move the body; A camera embedded in a casing formed in a longitudinal direction to collect image information of the front of the body, coupled to an upper portion of the body by a holder, and having a lens disposed in front of the casing; Left and right rotating means for rotating the camera at a predetermined angle in left and right directions; Vertical rotation means of the camera for rotating the camera at a predetermined angle up and down; A control unit including an input device for supplying power to the power supply unit to the moving means of the body, the left and right rotating means of the camera, the up and down rotating means of the camera, and the camera; And a display unit configured to display image information transmitted to the camera. The method of claim 1, The moving means of the body, Drive sprockets each rotatably coupled to both side walls of the body; An interlock sprocket coupled to the drive sprocket so as to be rotatable at predetermined positions on both side walls spaced a predetermined distance from the drive sprocket; An endless track associated with the drive sprocket and the outer ring of the interlock sprocket; Reactor fuel control rod inspection device comprising a moving motor for rotating the first rotating shaft of the drive sprocket protruding into the body both side walls. Under the second, Reactor fuel control rod inspection apparatus further comprises a reducer coupled to the output shaft coupled to the first rotating shaft in the body and the input shaft coupled to the first driving shaft of the moving motor to reduce the rotational speed of the moving motor. The method of claim 1, Left and right rotating means of the camera, A second rotary shaft rotatably inserted into a bushing of a predetermined height protruding from the bottom surface of the body, the pinion being formed on an outer diameter surface protruding above the bushing, and having an upper end coupled to a predetermined position of the holder; A linear rack engaged with the pinion of the second rotary shaft; Reactor fuel control rod inspection device comprising a first pneumatic cylinder coupled to the end of the rack is a first piston coupled to the linear reciprocating rack. The method of claim 1, The vertical rotation means of the camera, A second pneumatic cylinder installed on a bottom surface of the body to allow the second piston to move up and down while penetrating the lid; A gripping portion coupled to an upper end of the second piston and having a circular gripping groove connected to an outer circumferential surface thereof; A coupling portion which is externally wound at a predetermined position of the holder and is formed in connection with an outer diameter surface of a circular coupling protrusion inserted into the gripping groove; And a hinge shaft inserted into the first hinge hole formed below the holder and the second hinge hole formed above the second rotary shaft to allow the holder to rotate up and down on the second rotary shaft.