KR100622264B1 - Dimensional measurement and inspection system of candu fuel bundle in-bay of candu power plant - Google Patents

Abstract

The present invention relates to a device capable of precisely measuring and inspecting the specifications of a heavy water reactor fuel bundle. The present invention includes a specification measuring unit configured to measure the specifications of the fuel bundle using a plurality of linear displacement measuring sensors (LVDT); An inspection unit configured to inspect the surface of the nuclear fuel bundle through a radiation resistant camera; and a control unit for automatically processing various data and image data provided from the specification measuring unit and the inspection unit using a control computer and outputting the result values to the outside. It provides a heavy water reactor-type fuel bundle measurement and inspection equipment in the tank of heavy water nuclear power plant including.

According to the present invention, it is possible to accurately measure and inspect the fuel bundles in the air or in water using linear displacement measuring sensors (LVDTs), and to utilize them for the evaluation of the integrity of nuclear fuel bundles loaded in nuclear fuel channels in heavy water reactors. In addition, the measured data can be used as the basis for the development of new fuels, resulting in an improved effect of improving the safety of heavy water reactors.

Heavy water reactor, fuel bundle, CANFLEX, nuclear fuel rod, specification measuring device, linear displacement sensor (LVDT), radiation resistant camera, soundness evaluation

Description

DIMENSIONAL MEASUREMENT AND INSPECTION SYSTEM OF CANDU FUEL BUNDLE IN-BAY OF CANDU POWER PLANT}

1 is a block diagram of the heavy water reactor-type nuclear fuel bundle measurement and inspection equipment in the nuclear power tank according to the present invention as a whole;

2 is an external perspective view showing a specification measuring part and an inspection part provided in a heavy water reactor-type nuclear fuel bundle measurement and inspection device in a nuclear power plant tank according to the present invention;

3 is a detailed view showing the specification measuring unit and the inspection unit provided in the heavy water reactor-type fuel bundle measurement and inspection device in the nuclear power plant tank according to the present invention,

          a) a plan view, b) a partial incision front view,

          c) is a left side view;

4 is a cross-sectional view showing a motor of a rotating unit provided in the specification measuring unit shown in FIG. 3;

FIG. 5 is a sectional view showing a rotary cylinder of the position adjusting unit provided in the specification measuring unit shown in FIG. 3;

FIG. 6 is a sectional view showing the length and contour measuring unit of the specification measuring part shown in FIG. 3, a) which is a sectional view of a turning motor, b) which is a side view of FIG.

7 is a cross-sectional view showing the diameter and contour measuring unit of the specification measuring unit shown in Figure 3, a) is a longitudinal cross-sectional view, b) is a longitudinal side view,

         c) is a cross-sectional view;

8 is a detailed view of the holder equipped in the diameter and contour measuring unit shown in FIG.

         a) a cross section of the left cradle; b) a cross section of the right cradle;

9 is a detailed view of the inspection unit shown in FIG.

         a) a plan view, b) a longitudinal section view,

         c) is a side cross-sectional view;

FIG. 10 is a detailed view of the reflection mirror of the inspection unit illustrated in FIG. 3.

         a) is a side view, b) is a rear side view;

11 is a detailed view showing a nuclear fuel bundle to which the present invention is applied,

         a) is an external appearance perspective view, b) is a horizontal cross section figure.

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

1 .... Heavy water reactor fuel bundle measurement and inspection device in nuclear power plant tank of the present invention

10 .... Specifications Measuring part 12 .... Support plate

14 .... shaped frame 16 .... hooked frame

20 .. Rotating unit 22 .... Rotating motor

24 .... Drive pulley 26a, 26b .... First belt

28a, 28b, 28c ... driven pulley 40 .... positioning unit

42 .... rotary cylinder 44 .... rod

46 .... pusher block 48 .... roller

50 ... length and seam profile measuring unit

52,72,90 .... Linear Displacement Sensor (LVDT)

54 .... Double acting pneumatic cylinder 56 .... Slewing motor

70 .... Diameter and fuel rod surface contour measuring unit

74 .... 고정 type anchor

78 .... Guide rail 80 .... Ball screw

88a, 88b .... Sensor holder 150 .... Inspection

155 .... radiation resistant camera 157 ... 1st axis rail

159 .... ball screw 160 .... 1st drive motor

170 .... forward and backward moving block 174 .... 2nd drive motor

176 .... pinion gear 178 .... rack gear

180 .... Reflective Mirror 182 .... Angle Control

184 .... Column 186 .... Tightening screw

200 .... automatic control unit 210 .... control computer

212 .... Sensor control unit 214 .... Motor control unit

216 .... Data processing unit 232 .... Inspection image monitor (TV)

234 .... Control Computer Monitor 240 .... Video Recorder

300 .... Bundle of Nuclear Fuel 310 .... Nuclear Fuel Rod

W .... Countertop

The present invention relates to a device capable of precisely measuring the specifications of nuclear fuel bundles for heavy water reactors and inspecting the appearance of nuclear fuel rods. More specifically, the specifications of fuel bundles in air or in water can be measured using linear displacement sensor (LVDT). Accurate measurement and surface inspection of nuclear fuel bundles in water using a radiation-resistant camera can be used to assess the integrity of nuclear fuel bundles loaded into the fuel channel.The measured data can be used to develop new fuels. The present invention relates to a heavy water reactor-type fuel bundle measurement and inspection device in a nuclear power tank.

In general, power generating plants are classified into hydroelectric power plants, thermal power plants, and nuclear power plants according to the power source used. Among these, one example of nuclear reactors used in nuclear power plants is a heavy water reactor (hereinafter referred to as heavy water reactor).

The nuclear fuel bundle 300 loaded in the heavy water reactor includes a nuclear fuel bundle having 37 nuclear fuel rods (hereinafter referred to as 37 rod fuel bundles) or a CANFLEX fuel bundle having 43 nuclear fuel rods (hereinafter referred to as a CANFLEX fuel bundle). Center rod (1), inner ring (6 or 7), heavy ring (12 or 14), foreign exchange rods (18 or 21) of the structure, and in Figure 11 a), b) As shown, a plurality of nuclear fuel rods 310 are fixed side by side in parallel, the upper and lower ends of the nuclear fuel bundle 300, the end-bonding plate 314 and the nuclear fuel rods 310 of each ring are fixed by welding. In the middle, a spacer (not shown) is disposed. The heavy water reactor fuel bundle may be deformed when loaded in a nuclear fuel channel, which is a high temperature, high pressure, or radioactive environment, and the deformation may affect the integrity of the fuel bundle 300 and the fuel channel (not shown). Therefore, accurate measurement and inspection of the specification is required.

That is, the various data obtained through the measurement and inspection can be used for the health assessment of the fuel bundle 300 that is loaded and investigated in the nuclear fuel channel in the heavy water nuclear power plant.

However, since there is no automated device or system for accurately and accurately measuring or inspecting the specifications of the nuclear fuel bundle 300 in the air or in the water chamber of the nuclear power plant, the nuclear fuel channel in the nuclear water reactor is loaded and investigated. Nuclear fuel bundle specifications had problems that could not be identified.

The present invention is to solve the above-mentioned conventional problems, the object of the fuel bundle by precisely measuring the specifications of the nuclear fuel bundle loaded on the nuclear fuel channel and performing the surface inspection of the nuclear fuel bundle using a radiation camera It is an object of the present invention to provide a heavy water reactor fuel bundle measurement and inspection device in a nuclear power tank that is capable of precisely measuring and inspecting nuclear fuel bundle specifications in the air or in the water so as to assess the soundness.

The present invention to achieve the above object,

In the device for precisely measuring and inspecting the specifications of the fuel bundles used in the heavy water reactor,

A specification measuring unit configured to measure the specifications of the nuclear fuel bundle using a plurality of linear displacement measuring sensors;

An inspection unit configured to inspect the surface of the nuclear fuel bundle through a radiation resistant camera; and

A control unit for automatically processing various data and image data provided from the specification measuring unit and the inspection unit using a control computer and outputting the result values to the outside, including precisely measuring and inspecting the nuclear fuel bundle in air or in water And it provides a heavy water reactor-type fuel bundle measurement and inspection device in the nuclear power tank characterized in that it is configured to output the result value.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Heavy water reactor-type nuclear fuel bundle measurement and inspection device (1) in the nuclear power plant tank according to the present invention, as shown in Figure 1, the specification measuring unit 10 to measure the various specifications of the nuclear fuel bundle 300, and An inspection unit 150 for remotely photographing and inspecting the surface of the nuclear fuel bundle 300 as an image, and a control unit for processing and outputting various data and image data provided from the specification measuring unit 10 and the inspection unit 150 to the outside. And 200.

The specification measuring unit 10 is located on a support plate 12 of a predetermined size, and the support plate 12 has two corners thereof as shown in FIGS. 2 and 3 a), b) and c). 프레임 -shaped frame 14 is formed protruding from the upper side, the hook frame 16 is formed in the center of the 프레임 -shaped frame 14 is configured to hook the hook (not shown) of the crane (not shown). Accordingly, the support plate 12 may be locked to a depth of approximately 10 m into the inside of the heavy water tank W shown in FIG. 1 by the operation of a crane, or may be moved outward from the inside of the water tank W.

The specification measuring unit 10 mounted on the supporting plate 12 includes a rotating unit 20 in which the nuclear fuel bundle 300 is placed and rotated to one side of the supporting plate 12. 20 is provided with a rotary motor 22 as shown in Figure 4 on the top of the support plate 12, the drive pulley 24 is mounted on the shaft 22a of the rotary motor 22. In addition, the rotary unit 20 includes a plurality of first driven pulleys 28a which are rotated by being fastened to the first belt 26a of the endless track type that is caught by the driving pulley 24 and the first belt 26a. Have

The first driven pulleys 28a are disposed at one end of each of the plurality of rotation shafts 30 extending in the longitudinal direction of the rotation motor 22, and the rotation shaft 30 is located at the front of the rotation motor 22. And a second driven pulley 28b corresponding to the first driven pulley 28a is connected to the other end thereof, and is rotatably mounted through the support brackets 32a and 32b disposed at the rear thereof. It is comprised so that the 3rd driven pulley 28c may be caught to the lower side through the 2nd belt 26b which catches the 2nd driven pulley 28b.

The third driven pulley (28c) is located on the opposite side of the drive pulley (24) around the rotary motor 22, which is also rotatably connected to the rear support bracket (32b), When the driving pulley 24 is rotated by the operation of the rotary motor 22 through the configuration, it rotates the first driven pulley 28a through the first belt 26a, and the first driven pulley 28a. They rotate the second driven pulley 28b through the plurality of rotation shafts 30, which rotate the third driven pulley 28c in an infinitely orbital manner through the second belt 26b.

When the nuclear fuel bundle 300 is placed on the upper side of the first belt 26a and the second belt 26b, that is, as shown in FIG. 3b, the rotary unit 20 includes the left side of the nuclear fuel bundle 300. The right side is placed to span the first belt 26a and the second belt 26b, and in that state, the first and second belts 26a and 26b are rotated by the operation of the rotary motor 22. Therefore, the nuclear fuel bundle 300 placed thereon is rotated.

In addition, the rotation unit 20 is provided with a position adjusting unit 40 for adjusting the left and right positions of the nuclear fuel bundle 300 mounted on the first and second belts 26a and 26b in close proximity thereto. do. As shown in FIG. 3b) and FIG. 5, a plurality of rotary cylinders 42 arranged in parallel with the motor 22 on the left and right sides of the motor 22 of the rotating unit 20, The rotary cylinders 42 are fixed to the support brackets 32a and 32b to which the rotary shafts 30 are fixed, respectively, through the fasteners 42a and the bolts, and at the end of the rod 44, a pusher block ( 46) is mounted.

The pusher block 46 is rotatably mounted with a plurality of rollers 48 to provide a pushing force without damaging the edge of the nuclear fuel bundle 300.

That is, such a position adjusting unit 40, when the nuclear fuel bundle 300 is mounted on the first and second belts (26a, 26b) of the rotating unit 20, to accurately adjust the left and right positions For this purpose, the left and right positions of the nuclear fuel bundle 300 on the first and second belts 26a and 26b may be rotated during the rotation of the nuclear fuel bundle 300 by the rotary motor 22. 42 is operated to adjust the position in the longitudinal direction simultaneously with the rotation of the nuclear fuel bundle (300).

To this end, the left and right rotary cylinders 42 of the positioning unit 40 are operated in a state in which the rod 44 is elongated in the positioning operation of the nuclear fuel bundle 300. The pusher block 46 connected to is rotated from the downward state shown by the solid line in FIG. 5 to the upward state shown by the dotted line, and the rod 44 is gradually operated to be pulled toward the cylinder body side to thereby the pusher block 46. The plurality of rollers 48 are in close contact with the ends of the nuclear fuel bundle 300 in a rotating state to pull the nuclear fuel bundle 300, and the nuclear fuel bundle 300 on the first and second belts 26a and 26b. Will adjust the position of. In this process, the longitudinal movement of the nuclear fuel bundle 300 on the first and second belts 26a and 26b is rotated to minimize local wear during movement of the nuclear fuel bundle 300. to be.

In addition, the specification measuring unit 10 measures the length of the nuclear fuel bundle 300 to the left and right sides of the rotating unit 20 in which the nuclear fuel bundle 300 is positioned and rotated, and the contour of the end-bonded plate 314. And a length and contour measuring unit 50 for measuring the profile.

The length and contour measuring unit 50 includes a plurality of linear displacement measuring sensors (LVDTs) 52 arranged coaxially from left and right, respectively, with the rotation motor 22 of the rotating unit 20 interposed therebetween, Double acting pneumatic cylinders 54 for moving the sensors 52 left and right in the axial direction of the nuclear fuel bundle 300 on the rotating unit 20, and the sensors 52 in the circumferential direction of the nuclear fuel bundle 300. Swivel motors (56) for rotating to.

That is, the length and contour measuring unit 50 is fixed on the holder 58 in a row, as the linear displacement measuring sensors 52 are shown in a), b) of Figure 6, the arrangement interval is Corresponds to the center of each ring of the nuclear fuel bundle (300). That is, the lowest linear displacement sensor 52 is coincident with the center of the nuclear fuel bundle 300 and the center of the turning motor 56, and the upper ones gradually move toward the outer (radius) side of the nuclear fuel bundle 300. It is arranged and fixed in a straight line toward.

Therefore, if the linear displacement measuring sensors 52 arranged in this manner make one rotation, these sensors 52 are end-bonded plates 314 provided at both ends of the nuclear fuel bundle 300, as shown in FIG. 3B). It is a structure that turns around.

In this way, the length and contour measuring unit 50 is a rotational motor 56 for applying a rotational force for the linear displacement measuring sensor 52 to rotate the end bonded plate 314 of the nuclear fuel bundle 300 a round. Each of the nuclear fuel bundles 300 is provided to the left and the right, and the rotational shaft of the swing motor 56 is connected to the rear end of the holder 58 in which the sensors 52 are mounted in a row.

The swing motor 56 is connected to the moving table 54a of the double-acting pneumatic cylinder 54 through the support 56a on the lower side thereof. That is, the double acting pneumatic cylinder 54 has a movable table 54a which is inserted into the guide 54c on the slide base 54b and is movable, and the movable table 54a has a double acting pneumatic cylinder 54. It is movable along the guide 54c on the slide base 54b by the pneumatic force applied to the left and right directions.

As a result, the length and contour measuring unit 50 is capable of rotating in the circumferential direction of the nuclear fuel bundle 314 by a plurality of linearly aligned linear displacement measuring sensors 52 by the turning motor 56, double-acting pneumatic The cylinders 54 are movable in the longitudinal direction of the nuclear fuel bundle 300.

When the length and contour measuring unit 50 is to measure the length of the nuclear fuel bundle 300, the double-acting pneumatic cylinders 54 which are located opposite to each other on the left and right sides of the nuclear fuel bundle 300 are operated to linearly displace. The measuring sensors 52 move toward the left and right end bonded plates 314 of the nuclear fuel bundle 300. In this state, when the touch rods 52a of the respective sensors 52 respectively touch the nuclear fuel bundle 314 side, the respective sensors 52 have different voltages depending on the degree (strength) of the touch rods 52a being pressed. A value is sent to the controller 200 to be described later, and the controller 200 calculates a change in the movement distance of the corresponding sensors 52 based on the output value, and consequently, the movement distance change value of the left and right facing sensors. Measure the length of the nuclear fuel bundle 300 using the.

In addition, when the turning motor 56 is operated while the touch rods 52a of the linear displacement measuring sensor 52 are in contact with the fuel bundle 314, respectively, these linear displacement measuring sensors 52 are fuel bundles. It rotates in the circumferential direction while in contact with 314, and while rotating as described above is to continuously send different output values along the profile of the fuel bundle (314). Therefore, the controller 200 may reproduce, detect, and output the contours of the corresponding fuel bundles 314 based on these output values.

In addition, the specification measuring unit 10 includes a diameter and contour measuring unit 70 for measuring the diameter of the nuclear fuel bundle 300 and the contour of the nuclear fuel rod 310 having a substantially cylindrical shape.

The diameter and contour measuring unit 70 is a pair of linear displacement sensors disposed horizontally opposite to each other in front and rear of the nuclear fuel bundle 300, as shown in Figure 7 a), b), c) 72 and a U-shaped fixture 74 which allows these sensors 72 to be disposed across the nuclear fuel bundle 300 on the front and rear sides thereof, and the fuel holder 300 on the nuclear fuel bundle 300. It is provided with a feed motor 76 for moving in the longitudinal direction of the. In addition, the diameter and contour measuring unit 70 is a guide rail fixed to the support plate 12 side by side in the lower side of the nuclear fuel bundle 300 so that the guide 74 in the longitudinal direction of the nuclear fuel bundle (300). It is provided with a 78, the center of the guide rail 78 is connected to the rotation axis of the transfer motor 76, the ball screw 80 that can be forward and reverse rotation is mounted to be rotatable.

In addition, the ball screw 80 is screwed to the moving block 82 is connected to the fixed base 74, the forward and reverse rotation operation of the transfer motor 76 is moved through the rotation of the ball screw 80 ( 82 and the guides 74 are moved left and right along the guide rail 78.

The diameter and contour measuring unit 70 is for measuring the diameter of the nuclear fuel bundle 300 and the contour of the nuclear fuel rod 310 located on the outer diameter side of the nuclear fuel bundle 300, the transfer motor 76 is The pin-shaped fixture 74 is initially in a home position position away from the nuclear fuel bundle 300 placed on the rotating unit 20 to one side. However, when the feed motor 76 is operated, the ball screw 80 is rotated, which moves the pin-shaped holder 74 to stop at a predetermined position at one end of the nuclear fuel bundle (300).

In this state, when the pneumatic cylinders 72b positioned before and after operate to move the sensors 72 toward the nuclear fuel bundle, since the end of the touch rod 72a has a front and rear stroke of approximately ± 5mm, FIG. 7A As shown in), it is in contact with the surface of the outer nuclear fuel rods 310 corresponding to the diameter of the nuclear fuel bundle (300).

When the sensors 72 are in contact with each other and output a voltage value, the voltage values are converted into the diameter of the nuclear fuel bundle 300 in the controller 200, and the transfer motor 76 is additionally operated to operate the sensor 72. ) To move in the longitudinal direction of the nuclear fuel bundle (300). In other words, the sensors 72 are continuously measured while moving toward the other end from one end of the nuclear fuel bundle 300.

In addition, when the sensors 72 move in the longitudinal direction of the nuclear fuel bundle 300 as described above, the values are continuously output such that the values of the nuclear fuel bundle 300 are continuously output from one end to the other end. The longitudinal profile of the nuclear fuel rods 310 that each of the sensors 72 contacts may also be measured by converting the distance value from the controller using the detected voltage value.

On the other hand, the diameter and contour measuring unit 70 not only performs this measurement once, but also performs a plurality of times for each of the plurality of nuclear fuel rods 310 located at the outside of the nuclear fuel bundle 300. To this end, the nuclear fuel bundle 300 must be rotated by a predetermined angle on the rotation unit 20.

In this case, the fuel rods 310 of the fuel bundle 300 should be disposed on the rotating unit 20 such that the maximum outer diameter thereof is detected by the sensors 72 of the diameter and contour measuring unit 70. At this time, a reference setting sensor 90 for detecting the reference point is provided on one side of the rotating unit 20, as shown in Figs. The reference sensor 90 is composed of a linear displacement measuring sensor (LVDT) like the other sensors 52, 72, and the distance between the sensors 72 is limited to these sensors 72, 90. It coincides with the maximum outer diameter gap of the fuel rods 310 in contact with each other.

Accordingly, the sensor 90 detects the maximum diameter of the fuel rod 310 by contacting one of the nuclear fuel rods 310 outside the fuel bundle 300 at a predetermined point of the touch rod 90a. In this case, the sensors 72 are respectively arranged in correspondence with the maximum outer diameters of the nuclear fuel rods 310 in contact with them, and let such a state be a reference point of rotation.

As such, the position of the reference setting sensor 90 is very important because the sensors 72 provided in the diameter and contour measuring unit 70 provide a reference point for accurately detecting the diameter of the nuclear fuel bundle 300.

Meanwhile, in the state where the reference point is set as described above, the rotary motor 22 is rotated at a predetermined angle according to whether the nuclear fuel bundle 300 is a 37 rod nuclear fuel bundle or a CANFELX nuclear fuel bundle. The nuclear fuel bundle 300 is that the new fuel rods 310 are in contact with the sensor 72 is newly detected in diameter.

This diameter and contour measuring unit 70 interacts with the rotation unit 20 and the reference sensor 90 so that the fuel bundle 300 can be connected to the 37 rod fuel bundle or the CANFLEX fuel bundle. Simultaneously with the diameter measurement through the positioned fuel rods 310, all longitudinal profiles of 18 or 21 nuclear fuel rods 310 can be measured.

On the other hand, in the diameter and contour measuring unit 70, the pin-shaped holder 74 for arranging the sensors 72 to face each other, as shown in Figure 8a, b) the front and rear of the sensor holder ( 88a) and 88b have different structures.

That is, the sensor holder 88a on the front side has a vertical straight structure for mounting the sensor 72 horizontally, but the sensor holder 88b on the rear side forms an inclined portion S in the middle thereof, and toward the lower side thereof. A straight line Sa is formed to selectively mount the sensor 72 at different inclination angles as necessary.

This means that when the number of fuel rods 310 of the fuel bundle 300 to measure the diameter and contour is 37 or 43, the arrangement angle of the fuel rods 310 in the circumferential direction of each fuel bundle 300 is different. For this reason, the position of the diameter measuring sensors 72 must also be changed.

That is, in the case of the nuclear fuel bundle 300 having 37 nuclear fuel rods 310, 18 outer nuclear fuel rods 310 are arranged to form nine pairs to maintain a constant angle in the circumferential direction, and thus the sensor 72 It can be arranged horizontally.

However, in the case of the nuclear fuel bundle 300 having 43 nuclear fuel rods 310, since the outer nuclear fuel rods 310 are disposed 21, all of them are not paired, and thus, the sensors 72 are horizontally arranged. The exact diameter and contour of the fuel bundle 300 cannot be measured.

As such, in the case of the nuclear fuel bundle 300 having 37 nuclear fuel rods 310, the sensors 72 of the front and rear sensor holders 88a and 88b may be horizontally mounted to measure each other, but 43 may be measured. In the case of the nuclear fuel bundle 300 having the nuclear fuel rod 310, the sensor 72 of the front sensor holder 88a is mounted horizontally, and the sensor 72 of the rear sensor holder 88b is shown by a dotted line in FIG. 8B. As inclined on the inclined portion (S) it is to be arranged so as to coincide with the interval formed 21 outer nuclear fuel rods 310 in the circumferential direction.

In this way it is possible to measure the diameter of the fuel bundle 300 and the longitudinal contours of the fuel rods 300.

In addition, the heavy water reactor-type nuclear fuel bundle measurement and inspection device 1 according to the present invention has an inspection unit 150 configured to inspect the surface of the nuclear fuel bundle 300 through a radiation resistant camera 155.

The inspection unit 150 has a radiation resistant camera 155 mounted to remotely check whether the nuclear fuel bundle 300 is damaged in the nuclear power tank W, and a driving device for moving the nuclear fuel bundle 300.

The inspection unit 150 has a pair of first shaft rails 157 and a ball disposed therebetween for moving the camera 155 in the longitudinal direction of the nuclear fuel bundle 300 as shown in FIGS. 3A and 9. The screw 159 and the first driving motor 160 to rotate the forward and reverse thereof. That is, one end of the ball screw 159 is connected to the rotation shaft 160a of the first driving motor 160, and the ball screw 159 is coupled to the ball screw 159 so as to slide on the first shaft rail 157. The movable block 164 is screwed to allow horizontal movement of the left and right by operating the first driving motor 160.

In addition, a second shaft rail 166 is formed in the left and right moving blocks 164 orthogonal to the direction of the first shaft rail 157 on the upper plane thereof, and the second shaft rail 166 is formed in the second shaft rail 166. The front and rear movement blocks 170 which are slidably coupled in the longitudinal direction are disposed. The front and rear movement blocks 170 are horizontally arranged roller pairs 168 rotating while wrapping the second shaft rails 166 from side to side to be coupled to the second shaft rails 166 of the left and right movement blocks 164. Equipped with. In addition, as shown in FIG. 9, as a driving source, a second driving motor 174 is provided at one side of the front and rear moving block 170, and a pinion gear 176 is provided at a rotation shaft of the second driving motor 174. Is mounted, and the pinion gear 176 is connected to the gear rack fixed to the rack gear 178 fixed along the second shaft rail 166 on one side of the left and right moving block 164.

Accordingly, when the second drive motor 174 is operated, it rotates the pinion gears 176 on the rack gear 178 to achieve forward and backward movements, and as a result, the rollers 168 of the front and rear moving blocks 170 are The sliding movement is performed on the second shaft rail 166 of the left and right moving blocks 164.

Through such a driving mechanism, the radiation resistant camera 155 mounted on the front and rear moving block 170 is operated along the first shaft rail 157 through the operation of the first driving motor 160 of the nuclear fuel bundle 300. In the longitudinal direction and through the operation of the second drive motor 174 is accessible in the diameter (radius) direction of the nuclear fuel bundle 300 along the second shaft rail 166.

On the other hand, the radiation-resistant camera 155 is provided with a lens tilting (Tilt) function to enable the tilting by itself through the remote angle adjustment of the built-in lens (not shown).

Therefore, the inspection unit 150 is a radio-resistant camera 155 is moved along the longitudinal direction of the nuclear fuel bundle 300, and also moved in the radial direction of the nuclear fuel bundle 300 to take a close-up, various using the tilting function It is possible to shoot at an angle to enable precise remote image inspection of the nuclear fuel bundle 300.

In addition, the inspection unit 150 has a plurality of opposite sides of the nuclear fuel bundle 300, that is, the opposite side where the camera 155 is disposed in order to prevent the blind area, which the camera 155 cannot photograph, exists. The reflective mirrors 180 of the camera 155 is configured to indirectly photograph the end portion of the bonding plate 314 that can not be photographed.

The reflective mirrors 180 are provided at both ends of the nuclear fuel bundle 300, respectively, in FIG. 3, which causes the edge bonding plate 314 of the nuclear fuel bundle 300 that the camera 155 cannot photograph to the camera 155 side. It is configured to illuminate. In addition, as shown in FIG. 10, the reflective mirror 180 includes an angle adjusting plate 182 that adjusts the mounting angle so that the surface of the mirror 180 is inclined in the vertical direction.

The pillar portion 184 vertically disposed on the support plate 12, a plurality of tightening screws 186 screwed to the pillar portion 184, and the pillar portion by the tightening screws 186. An angle adjusting plate 182 fixed to one side of the 184, and a reflective mirror 180 and the like fixed to the front side of the angle adjusting plate 182.

The angle adjusting plate 182 forms a plurality of circular arc-shaped holes 182a with respect to each of the tightening screws 186 so as to maintain a gap corresponding to the gap between the tightening screws 186, 186 are configured to penetrate.

Therefore, the mounting inclination of the reflective mirror 180 can be adjusted by adjusting the positions of the circular holes 182a of the angle adjusting plate 182 fixed by the tightening screws 186 on the pillar portion 184. In this case, the camera 155 may select and fix an angle that is optimally suitable for the camera 155.

In addition, the heavy water reactor-type nuclear fuel bundle measurement and inspection device 1 in the nuclear power tank according to the present invention uses a control computer 210 to control various data and image data provided from the specification measuring unit 10 and the inspection unit 150. And a control unit 200 for processing and outputting the result to the outside.

The controller 200 is electrically connected to each of the linear displacement measurement sensors (LVDT) 52, 72, 90 as shown in FIG. 1 to control its operation and receive signals from them. The sensor control unit 212 and the motors 22, 56, 76, 160, 174 and double acting pneumatic cylinders 54 to control the sensors 52, 72 to the desired position. Motor control unit 214 for controlling movement, and data processing unit 216 for processing data measured by respective linear displacement measurement sensors (LVDT) 52, 72, 90, and the like.

And connected to these control units (212) (214) (216) to process a variety of data, perform the necessary calculations, according to a predetermined program, various sensors 52, 72, 90 and motor ( 22, 56, 76, 160, 174 and the like, and a control computer 210 for controlling.

In addition, the control unit 200 is a control monitor 234 for displaying and outputting the processed detection values and measurement values to external workers, and displays the control state and an inspection image monitor showing images of the radiation camera of the inspection unit. And a display unit 230 having TVs (232), and an image recorder (240), a personal computer (242), and the like.

The heavy water reactor-type nuclear fuel bundle measurement and inspection device 1 according to the present invention configured as described above is provided with the respective sensors 52, 72, 90 so that the operation is performed in the air or in the water. The motors 22, 56, 76, 160, 174 and various important parts such as the cylinder 54 and the camera 155 are all watertight and can be introduced into the nuclear power plant W.

In the nuclear water reactor-type nuclear fuel bundle measurement and inspection device (1) of the present invention, when the operation is carried out in the water, first, the measurement unit 10 and the inspection unit 150 mounted on the support plate 12 are cranes. After being hoisted using a hook (not shown), it may be slowly introduced into the nuclear power plant W to be locked up to approximately 10 m.

In addition, the various power sources, signals, and pneumatic supply lines K and the like are drawn out of the water tank W from the locked specification measuring unit 10 and the inspection unit 150 and are connected to the automatic control unit 200. Is adjusted by the operator outside of the tank (W).

As such, the nuclear fuel bundle 300 must be placed on the rotating unit 20 to measure and inspect the nuclear fuel bundle 300 using the submerged measurement measuring unit 10 and the inspection unit 150.

In this case, the fuel bundle 300 to be measured and inspected is picked up using a separate fuel bundle handling device (not shown) and moved to move the first and second belts 26a and 26b of the rotating unit 20. Is put on.

Since the handling device (not shown) may use a conventional handling device that can stably move without impacting the nuclear fuel bundle 300, a more detailed description thereof will be omitted.

In this way, the nuclear fuel bundle 300 mounted on the rotating unit 20 is capable of determining precise measurement and contour detection of various specifications and damage of the outer surface through an image according to the present invention.

Measurement of fuel bundle length and profile of fuel bundle

To this end, the present invention allows the nuclear fuel bundle 300 mounted on the first and second belts 26a and 26b of the rotary unit 20 to be rotated by the driving of the rotary motor 22. Numerous driven pulleys 28a, 28b and 28c are rotated together with the first and second belts 26a and 26b through the rotary motor 22, so that the nuclear fuel bundle 300 is first and second. It is rotated on the belts 26a and 26b.

In addition, the nuclear fuel bundle 300 is operated by the positioning unit 40 to move to a predetermined position. The positioning unit 40 is a pusher block 46 in a state in which the rod 44 of the plurality of rotary cylinders 42 is elongated from the downward state shown by the solid line in FIG. Rotated, and the rod 44 is gradually operated to be pulled toward the cylinder body side.

Thus, the fuel bundle 300 positioned to the left is pulled to the right by the left pusher block 46, and the fuel bundle 300 positioned to the right is pulled to the left by the pusher block 46 on the right. In this process, the nuclear fuel bundle 300 is rotated to minimize local friction with the first and second belts 26a and 26b.

In this way, the nuclear fuel bundle 300 whose position is adjusted through the position adjusting unit 40 is measured through the length and contour measuring unit 50.

The length and contour measuring unit 50 is operated by the double-acting pneumatic cylinders 54 coaxially arranged with the nuclear fuel bundle 300 on both ends of the nuclear fuel bundle 300 to operate the guide 54c on the slide base 54b. The movable table (54a) is fitted to slide in the movement to the both ends of the nuclear fuel bundle (300) side.

In addition, a plurality of linear displacement sensors 52 moved to the nuclear fuel bundle 300 side through the movable table 54a are operated so that the touch rods 52a are provided at both ends of the nuclear fuel bundle 300. ), The voltage value indicating the degree of pressurization is transmitted from the respective sensor 52 to the controller 200 side.

These voltage values, since the distance value for each voltage value is pre-programmed, the control unit can accurately convert the length of the fuel bundle 300 through the voltage value.

Thus, four sensors (LVDTs) 52 moved to both ends of the nuclear fuel bundle 300 by the double-acting pneumatic cylinders 54 are mounted on the holder 58 as shown in FIG. 6A. Since the sensors 52 are arranged symmetrically about the nuclear fuel bundle 300 as shown in FIGS. 1 and 3, the voltage values output by the pairs of the sensor 52 facing each other are determined at that point. The control unit is programmed to be converted to represent the length of the nuclear fuel bundle 300, so that the output values detected by each of the four pairs of sensors 52 can be converted into the length of the nuclear fuel bundle 300 at four points. It is.

In this state, when the swing motor 56 is operated, these linear displacement sensors 52 rotate in the circumferential direction of the nuclear fuel bundle 314, and the sensors 52 are rotated as described above. 52a) move along the profile of the fuel bundle 314 to continuously send different output values.

Therefore, the controller 200 may detect the length of the corresponding fuel bundle 300 based on these output values, as well as the corresponding fuel bundle 314 based on the length differences in the circumferential direction of the nuclear fuel bundle 300. It is possible to detect and reproduce the outline of these fields.

Measurement of diameter of fuel bundle and contour of fuel rod

To this end, the present invention uses the diameter and contour measuring unit 70, as shown in Figure 7 a), b), c).

The diameter and contour measuring unit 70 is to measure the diameter of the nuclear fuel bundle 300 and the contour of the nuclear fuel rod 310 located on the outer side of the nuclear fuel bundle 300, the sensor of the U-shaped holder 74 72 are in a position deviated from the fuel bundle 300 and the ball screw 80 rotates by the operation of the transfer motor 76, which stops at a predetermined position at one end of the fuel bundle 300.

In this state, when the pneumatic cylinder 72b of the U-shaped holder 74 is operated by the command of the controller, the sensors 72 move in the direction of the nuclear fuel bundle, and the end of the touch rod 72a is the nuclear fuel bundle ( The outer surface of the outer nuclear fuel rods 310 corresponding to the diameter of 300 is in contact with each other.

When the diameter of the nuclear fuel bundle 300 is measured in this state, the transfer motor 76 is additionally operated so that the sensors 72 move in the longitudinal direction of the nuclear fuel bundle 300, and From one end to the other end.

Therefore, the sensors 72 continuously detect the surface contour of the corresponding fuel rod 310 while moving in the longitudinal direction of the nuclear fuel bundle 300. In addition, the detection value of measuring the surface contour of the fuel rod in the longitudinal direction of the nuclear fuel bundle 300 is controlled by the diameter of the nuclear fuel bundle 300 along the longitudinal direction of the nuclear fuel rod 310 in contact with the sensors 72. It is converted by program of.

On the other hand, the diameter and contour detection unit 70 not only performs this measurement once, but also performs a plurality of times for each of the plurality of nuclear fuel rods 310 located outside the fuel bundle 300. That is, in the case of a 37 rod fuel bundle, since the nuclear fuel rods 310 are located at the outer side of 18, the nuclear fuel bundle 300 rotates at least 9 on the rotating unit 20, and at least the sensors 72 are fuel bundles. Measuring the diameter for each length of the nuclear fuel bundle 300 while reciprocating (300) nine times.

In addition, the detected value obtained in this process is converted into the longitudinal contours of at least the 18 outer nuclear fuel rods 310 to be reproduced and output.

On the other hand, as described above, the reference fuel sensor 300 is provided so that the nuclear fuel bundle 300 is rotated exactly by a predetermined angle on the rotation unit 20, and the reference sensor 90 is the touch bar (90a) The maximum diameter of any one of the nuclear fuel rods 310 outside the fuel bundle 300 at a predetermined point is detected as a reference point.

At this reference point, the front and rear sensors 72 provided on the fin-shaped holder 74 are those set in advance to detect the diameter of the nuclear fuel bundle 300.

And, through the rotating unit 20 a new pair of nuclear fuel rods 310 are rotated at a predetermined angle so that the diameter is measured by the front and rear sensors 72, and finally nine rotation, all 18 The nuclear fuel rods 310 are measured.

In addition, when the nuclear fuel bundle 300 is a 37 rod nuclear fuel bundle, the sensors 72 on the front and rear sensor holder (88a) (88b) provided in the U-shaped holder 74, respectively, horizontally facing each other. When the fuel bundle 300 is a CANFLEX fuel bundle, the sensor 72 of the front sensor holder 88a is mounted horizontally, and the sensor 72 of the rear sensor holder 88b is mounted in FIG. 8B. As shown by the dotted line, the fuel rods 310 that are inclinedly mounted and closest to the diameter of the corresponding fuel bundle 300 are measured by the front and rear sensors 72.

That is, in the case where the fuel bundle 300 is a CANFLEX fuel bundle, since the nuclear fuel rods 310 are located 21 at the outer side, the nuclear fuel bundle 300 rotates at least 11 on the rotating unit 20, and at least the sensor ( 72 measure the diameter for each length of the nuclear fuel bundle 300 while reciprocating the nuclear fuel bundle 300 11 times. In addition, the detected value obtained in this process is converted into the longitudinal contours of the at least 21 outer nuclear fuel rods 310 and reproduced and output.

Imaging tests on the surface of the nuclear fuel bundle

In the nuclear reactor-type nuclear fuel bundle measurement and inspection device 1 in the nuclear power tank according to the present invention, the surface of the nuclear fuel bundle 300 can be inspected precisely through the radiation resistant camera 155.

To this end, the radiation-resistant camera 155 provided in the present invention is approximately ± 580 mm in the longitudinal direction of the nuclear fuel bundle 300 along the first shaft rail 157 by the operation of the first driving motor 160 of the inspection unit 150. It is movable and is accessible by moving ± 200mm in the radial direction of the nuclear fuel bundle 300 by the operation of the second drive motor 174.

In addition, the radiation-resistant camera 155 can accurately capture a desired portion of the nuclear fuel bundle 300 through its own built-in tilting function, and the image signal is transmitted to the image control unit 216 and the control computer 210. And, it is sent out to the worker remotely through the inspection image monitor (232).

Then, the operator to move the camera 155 to the desired position through the operation and the tilting function of the first and second drive motors 160, 174, through the reflection mirror 180 of the nuclear fuel bundle 300 The end bonding plate 314 can also be taken to send an image.

In addition, by rotating the nuclear fuel bundle 300 in the circumferential direction by driving the rotary unit 20 in the image capturing process, the nuclear fuel rods 310 located at the outer thereof are photographed in close proximity with the camera 155, and the controller 200 By using the image capturing function (Image Capturing) function provided in the image control unit 216 of the) to accurately photograph the desired portion, through which the appearance of the nuclear fuel bundle 300 can be inspected.

In the above description, a process of obtaining measured values by the plurality of sensors 52, 72, and 90 is mainly described, and a description of the calibration procedure of these sensors and components is omitted. As is the case with other precision measuring instruments, it is natural that a calibration process is required, such as preliminary checking whether various measurement components can accurately detect the measured values and compensating for error values.

However, the part precision checking and correction process for the accurate operation and detection of these various components and elements can be used by the common techniques used in the art, so a detailed description thereof will be omitted.

In the above description, only a few of the important processes and functions of the present invention have been described by way of example, but the present invention is not limited thereto.

The present invention uses not only measurement items such as the surface contour of the fuel rod, the edge of the bundle bundle of the fuel bundle, the diameter and length of the fuel bundle, but also the contour of the bearing pad and the cylinder of the fuel bundle using the detected values. It can also be used for detection, and the surface defects such as bearing pads of the nuclear fuel rods 310, welded portions of the end junction plate 314, end closures, and the like can be easily remotely inspected. Of course, the values can be used for quality control of various other management items.

In addition, the present invention has been described with respect to a specific structure, but the present invention is not limited thereto, and the modified structure may be variously implemented by those skilled in the art without departing from the spirit and scope of the present invention. For example, changes in simple shapes and materials of various mechanical parts, changes in mechanical specifications, and use of equivalents are all apparent through the present invention, and it is apparent that such modified structures are all within the scope of the present invention. Do.

As described above, according to the present invention, the specifications of the fuel bundle 300 are accurately measured or detected in the air or in a nuclear power tank, and various data obtained therefrom are used to evaluate the integrity of the fuel bundle loaded on the fuel channel. Can be.

Therefore, the effects of improving the safety of the heavy water reactor by evaluating the health of the nuclear fuel bundle 300 and improving the safety of the heavy water reactor are obtained.

Claims (20)

In the device for precisely measuring and inspecting the specifications of the nuclear fuel bundle 300 used in the heavy water reactor, A specification measuring unit (10) configured to measure the specifications of the nuclear fuel bundle (300) by using a plurality of linear displacement measuring sensors (52, 72); An inspection unit 150 configured to inspect the surface of the nuclear fuel bundle 300 through a radiation resistant camera 155; and, And a control unit 200 for automatically processing various data and image data provided from the specification measuring unit 10 and the inspection unit 150 using a control computer 210 and outputting the result values to the outside. A heavy water reactor-type nuclear fuel bundle measurement and inspection device in a nuclear power tank, characterized in that the bundle 300 is configured to precisely measure and inspect in the air or water and output the result. According to claim 1, wherein the specification measuring unit 10 and the inspection unit 150 is located on a support plate 12 of a predetermined size, the support plate 12 protrudes from the edges on both sides of the frame 14 to the upper side And a hook frame 16 is formed in the center of the frame 14 so as to be hooked to a hook of a crane (not shown). According to claim 1, wherein the specification measuring unit 10 has a rotary unit 20 is rotated by the nuclear fuel bundle 300 is placed, the rotary unit 20 is a rotary motor 22 and its shaft ( A drive pulley 24 connected to 22a and an endless first belt 26a and a plurality of first driven pulleys 28a fastened to the drive pulley 24; The second driven pulley 28b corresponding to the first driven pulley 28a, the second belt 26b applied to the second driven pulley 28b, and the third driven pulley 28c on the lower side thereof. When the left and right sides of the nuclear fuel bundle 300 are placed to span the first belt 26a and the second belt 26b, the first and second belts 26a are operated by the operation of the rotary motor 22. Nuclear reactor type nuclear fuel bundle measurement and inspection equipment in the nuclear power tank, characterized in that the nuclear fuel bundle (300) on (26b) is rotated. The position adjusting unit 40 of claim 1, wherein the specification measuring unit 10 adjusts the left and right positions of the nuclear fuel bundle 300 mounted on the first and second belts 26a and 26b. Include additional The positioning unit 40 includes a plurality of rotary cylinders 42, a pusher block 46 is mounted at an end of the rod 44 of the positioning unit 40, and the pusher block 46 is mounted on the pusher block 46. A plurality of rollers 48 are mounted to provide a pushing force without damaging the edge of the nuclear fuel bundle 300 so that the plurality of rollers 48 provided in the pusher block 46 pull the nuclear fuel bundle 300 and An apparatus for measuring and inspecting a heavy water reactor type fuel bundle in a nuclear power tank, characterized in that for adjusting the position. 5. The plurality of rollers (48) provided in the pusher block (46) according to claim 4, wherein the position adjusting unit (40) is provided in the pusher block (46) during the rotation of the nuclear fuel bundle (300) on the first and second belts (26a) (26b). ) Is a nuclear reactor tank nuclear fuel bundle measurement and inspection device, characterized in that configured to minimize the local wear during the movement of the fuel bundle (300) by pulling the nuclear fuel bundle (300). The method of claim 3, wherein the measurement unit 10 further comprises a length and contour measuring unit 50 for measuring the length of the nuclear fuel bundle 300, the profile of the nuclear fuel bundle 314 (profile) , The length and contour measuring unit 50 includes a plurality of linear displacement measurement sensors (LVDTs) 52 and these sensors 52 in the longitudinal direction of the nuclear fuel bundle 300 on the rotating unit 20. Double-pneumatic pneumatic cylinders 54 for moving, and swinging motors 56 for rotating these sensors 52 in the circumferential direction of the nuclear fuel bundle 300, the nuclear reactor nuclear reactor bundle Specification measuring and inspection equipment. 7. The displacement sensor of claim 6, wherein the linear displacement sensors (52) are fixed in a row on the holder (58), the arrangement of which is at the center of the nuclear fuel bundle and the center of each ring. If one rotation, these sensors (52) is a nuclear reactor in the nuclear reactor tank characterized in that the structure of turning the end junction plate 314 provided at both ends of the nuclear fuel bundle (300) circle. 7. The double-acting pneumatic cylinder (54) according to claim 6 has a movable table (54a) which is movable by being inserted into a guide (54c) on the slide base (54b), and the movable table (54a) has an upper side thereof. The linear displacement measuring sensor 52 is rotatable in the circumferential direction of the end bonded plate 314 by the turning motor 56, and the nuclear fuel is driven by the double-acting pneumatic cylinders 54. A heavy water reactor-type fuel bundle measurement and inspection device in a nuclear power tank, characterized in that movable in the longitudinal direction of the bundle (300). According to claim 1, The specification measuring unit 10 further comprises a diameter and contour measuring unit 70 for measuring the diameter of the nuclear fuel bundle 300 and the contour of the nuclear fuel rod 310, The diameter and contour measuring unit 70 includes a pair of linear displacement measuring sensors 72 arranged horizontally opposite to each other at the front and rear sides of the nuclear fuel bundle 300, and the sensors 72 are connected to the nuclear fuel bundle 300. ) And a guide (74) to be disposed on the front and rear sides across the (), and the feed motor 76 and the guide rail (78) and the ball screw to move the guide 74 in the longitudinal direction of the nuclear fuel bundle (300) A heavy water reactor-type nuclear fuel bundle measurement and inspection device in a nuclear power tank comprising a (80). 10. The sensor of claim 9, wherein the diameter and contour measuring unit 70 further comprises a reference sensor 90, wherein the reference sensor 90 is spaced apart from the sensors 72. Since the touch rod 90a of the sensor 90 is formed to coincide with the maximum outer diameter interval of the nuclear fuel rods 310 in contact with each of the 90 fuel rods 310, When the maximum diameter is detected, the sensors (72) are arranged to correspond to the maximum outer diameters of the nuclear fuel rods (310) in contact with them, respectively. 10. The method of claim 9, wherein the diameter and contour measuring unit 70 is provided with sensor holders 88a and 88b of which the holders 74 for arranging the sensors 72 face each other are different from each other in front and rear. The sensor holder 88a on one side has a vertical straight structure for mounting the sensor 72 horizontally, but the sensor holder 88b on the other side forms an inclined portion S in the middle thereof, and a straight portion (downward) toward the lower side thereof. Forming sa), and optionally equipped with sensors 72 at different inclination angles, each of the nuclear reactor-type nuclear fuel bundle measurement and inspection equipment in the nuclear power tank. The method of claim 11, wherein the sensor holder (88a, 88b) is 37 if the fuel rods 310 of the fuel bundle 300, the sensor 72 is mounted horizontally to face each other, the nuclear fuel rod 310 If the number is 43, the sensor 72 of the one side sensor holder (88a) is mounted horizontally, the sensor 72 of the other sensor holder (88b) is inclined mounted on the inclined portion (S) Instrument for measuring and inspecting nuclear fuel bundles in heavy water reactors. According to claim 1, The inspection unit 150 is provided with a first drive motor 160 and the left and right movement block 164 for moving the camera 155 in the longitudinal direction of the nuclear fuel bundle 300, the left and right movement The block 164 is provided with a forward and backward movement block 170 and a second driving motor 174 which are orthogonal to the movement direction of the left and right movement blocks 164 on the upper plane thereof. The radioactive camera 155 is mounted in the longitudinal direction of the nuclear fuel bundle 300 through the operation of the first driving motor 160 and the diameter (radius) of the nuclear fuel bundle 300 through the operation of the second driving motor 174. A heavy water reactor-type fuel bundle measurement and inspection instrument in a nuclear power tank characterized by being accessible in the direction of. 15. The method of claim 13, wherein the first drive motor 160 is one end of the ball screw 159 is connected to the rotary shaft (160a), the ball screw 159 is disposed in the longitudinal direction of the nuclear fuel bundle (300) It is formed along a pair of first shaft rail 157, the left and right movable block 164 is screwed to the ball screw 159, the camera 155 is a nuclear fuel by the operation of the first drive motor 160. A heavy water reactor-type fuel bundle measurement and inspection device in a nuclear power tank, characterized in that movable in the longitudinal direction of the bundle (300). The pinion gear 176 is mounted on the rotation shaft of the second driving motor 174, and the pinion gear 176 is the second shaft rail 166 on one side of the left and right moving blocks 164. In this case, the second radiation-resistant camera 155 is movable in a diameter (radius) direction of the nuclear fuel bundle 300 when the second driving motor 174 is operated to be coupled to the fixed rack gear 178. A heavy water reactor-type fuel bundle measurement and inspection instrument in a nuclear power tank. The method of claim 13, wherein the inspection unit 150 is provided with a plurality of reflective mirrors 180 on the opposite side where the camera 155 is disposed, the end-bonding plate of the nuclear fuel bundle 300 that the camera 155 can not directly photograph ( 314) indirectly photographed in order to prevent the existence of dead zones in the nuclear reactor tank nuclear fuel bundle measurement and inspection equipment. The method of claim 16, wherein the reflective mirror 180 is provided with an angle adjusting plate 182 for adjusting the mounting angle so that the mirror 180 is inclined in the vertical direction of the nuclear fuel bundle 300, the angle adjusting plate 182 ) Has a plurality of circular arc-shaped holes (182a) with respect to the tightening screws (186). The sensor control unit (100) of claim 1, wherein the controller (200) is electrically connected to each of the linear displacement measurement sensors (LVDTs) 52 and 72 to control its operation and to receive and process signals from them. 212), Motor control unit 214 for controlling motors 22, 56, 76, 160, 174 and double acting pneumatic cylinders 54 which move the linear displacement sensors 52, 72 to a desired position. And, an image control unit (216) for collecting and processing images photographed by the camera (155). The display unit of claim 1, wherein the controller 200 includes a test image monitor 232 for displaying and outputting the processed detection values and measured values to external workers, and a display unit having control status display monitors 234. 230), An image recorder (240) and a personal computer (242) are provided to move and store various measured values and detected values. The nuclear power tank according to claim 1, wherein the linear displacement sensors (52, 72) and the cameras (155) are all watertight, so that the operation is performed in the atmosphere or in the water of the nuclear power tank (W). Instrument for measuring and inspecting nuclear fuel bundles in heavy water reactors.

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