KR102101495B1 - Inspection equipment for ct/lin gap measurement of pressurized heavy water reactor - Google Patents

Abstract

Disclosed is an inspection device for measuring the gap between a Kalandria tube and a liquid material injection tube. The present invention is provided on one side of the connecting portion extending into a constant length and inserted into the Kalandria reactor and the connecting portion is provided on the other side to check the state of the pipe installed inside the reactor and the other side of the connecting portion provided on the other side of the pipe A laser inspection unit providing a laser light source to measure a state; And a reflective mirror rotatably provided within a certain angular range at the bottom of the visual inspection unit,
According to the present invention, image observation, storage, and evaluation inside the Kalandria tube can be performed in real time, and observation values can be corrected or more accurately measured through a laser.

Description

INSPECTION EQUIPMENT FOR CT / LIN GAP MEASUREMENT OF PRESSURIZED HEAVY WATER REACTOR}

The present invention relates to an interval measuring device capable of measuring the amount of deflection of a pipe installed inside a reactor inserted into a view port on the upper part of a Kalandria reactor in a heavy water reactor, and more specifically, using a naked eye and a laser to improve inspection reliability. It relates to an inspection device for measuring the gap between the liquid poisoning tube of the Kalandria tube and the heavy water that can be made.

In general, the Gaam heavy water reactor is a reactor that uses the heavy water reactor as a coolant and moderator, and the Candu model developed in Canada is representative. In Korea, Wolseong 1,2,3,4 are pressurized heavy water reactors.

Unlike pressurized heavy water reactors that use low concentration of 2-5% uranium (pressurized water reactors and boiling water reactors), unconcentrated natural uranium (a ratio of U-325 of 0.7%) is used, and heavy water reactors used as coolant and moderator Uses natural uranium because it absorbs little neutrons and has less neutron loss compared to ordinary water.

On the other hand, in the light water reactor, fuel exchange is performed in the state where the nuclear reactor is stopped every time the nuclear fuel is exchanged. In the pressurized heavy water reactor, nuclear fuel can be replaced during operation using a horizontal cylindrical reactor.

Specifically, the pressurized heavy water reactor is a cylindrical vessel called Calandria, which is installed in a horizontal direction, and in Kalandria, hundreds of pressure tubes having a diameter of about 10 cm are also penetrated in the horizontal direction, and nuclear fuel Is supplied in a pressure tube in the form of a fuel bundle, and is usually configured to supply 12 nuclear fuel assemblies in one pressure tube.

In addition, piping that serves to control and react to neutron detection of the reactors, such as the Kalandria tube (CT), where the nuclear fuel is located, and the liquid poison injection tube (LIN), crosses each other horizontally.

The pipes inside these reactors are deflected by complex factors such as stress, self-weight, neutron irradiation, and creep as the service life of the heavy reactor reactors increases. In this case, there is a risk of serious human or property damage.

In the past, an ultrasonic inspection apparatus was used to measure the amount of deflection, but it is difficult to accurately measure the deformation of the pipe due to the wide sound field and wavelength of the ultrasonic probe.

More specifically, in the case of the Kalandria tube, deformation of the shape occurs due to the effect of high neutron irradiation and high temperature, and it is difficult to precisely measure the deformation of such a pipe with a wide sound field and wavelength of ultrasonic waves, and a short inspection distance in water Therefore, only the clearance of adjacent pipes can be measured.

In addition, the information acquired using ultrasound is converted into a digital signal and transmitted to the user's control device. The high signal-to-noise ratio due to high-level radiation dose may be a factor that makes it difficult to discriminate the pipe signal.

Therefore, there is a need to develop an inspection apparatus for preventing the contact of the pipes, which allows the user to periodically measure the gap between the pipes with the naked eye, and to measure minute differences that cannot be discerned with the naked eye.

In order to solve the above-described problem, the present invention has an object to provide an inspection device for measuring a gap between a calandria tube and a liquid poison injection tube as heavy water capable of measuring the amount of deflection of a pipe with the naked eye.

Another object is to provide an inspection device for measuring the gap between the Kalandria tube and the liquid poisoning tube with heavy water, which can perform more accurate observation using a laser.

Another object is to provide an inspection device for measuring a gap between a caldalia tube and a liquid poisoning tube that can prevent interference with a structure by controlling a viewing angle and a laser light path.

On the other hand, the object of the present invention is not limited to the object mentioned above, and other objects not mentioned are clearly known to a person having ordinary knowledge in the technical field to which the present invention belongs (hereinafter referred to as a 'normal engineer') Will be understandable.

In order to achieve the above object, the inspection equipment for measuring the distance between the heavy water calenderia tube and the liquid poisoning tube according to the present invention extends to a certain length and is provided at one side of the connection part and the connection part to be inserted into the calandia reactor and the reactor. It is provided on the other side of the visual inspection unit and the connection unit provided to be able to check the state of the pipe installed therein, and provides a laser light source to measure the state of the piping. It includes a reflective mirror provided as possible.

Preferably, the visual inspection unit includes a camera that photographs the state of the piping, a motor that provides rotational force to the reflection mirror, and a lamp that generates illumination light, and the reflection mirror rotates within a certain angular range. It is characterized in that it is possible to control the angle of reflection of the camera and the illumination and the laser.

Meanwhile, the connection part includes a laser guide tube through which the laser moves, and the laser guide tube is provided through the visual inspection unit.

Preferably, the laser inspection unit includes a laser light emitting unit for generating the laser and a path variable variable agent for changing at least one or more movement paths of the laser generated by the laser light emitting unit, and the movement path through the path variable additive The variable laser is characterized in that it moves along the laser guide tube.

In addition, the path variable subagent, the first path variable variable to change the movement path of the laser generated by the laser light emitting unit and the second path variable variable to change the movement path of the laser variable through the first path variable additive It characterized in that it comprises a; and a driving driver for controlling the position of the subtitle and the first path variable subtitle and the second path variable subtitle.

In addition, it is provided on the upper side of the path variable portion to prevent the interference of the cable provided inside the laser inspection portion and the side portion is provided on one side of the path variable portion to prevent interference of the cable provided inside the laser inspection portion Characterized in that it further comprises a vertical subtitle.

On the other hand, the visual inspection unit is located opposite to any of the Kalandria tube or the liquid toxic tube, and then adjusts the angle to a position orthogonal to the other of the Kalandria tube or the liquid toxic tube, the Kalandria tube And it is characterized in that to perform the gap measurement of the liquid poisoning tube.

According to the present invention, it will be possible to observe, store and evaluate images in real time through the visual inspection unit.

In addition, the observation value through the visual inspection unit may be corrected through the laser inspection unit or more accurate measurement may be possible.

It will be possible to prevent interference with the structure by controlling the viewing angle and the laser light path.

The effects of the present invention are not limited to those described above, and other effects not mentioned will be apparent to those skilled in the art from the following description.

1 is a perspective view of an inspection device according to an embodiment of the present invention.
Figure 2 is a perspective view of the visual inspection unit of Figure 1;
3 is an enlarged side view of FIG. 2.
Fig. 4 is a front view of Fig. 2;
5 is a perspective view of the laser inspection unit of Figure 1;
6 is an implementation view of the visual inspection unit of FIG. 2;

Hereinafter, the present invention will be described in more detail with reference to the drawings. It should be noted that the same components in the drawings are indicated by the same reference numerals wherever possible. In addition, descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

In addition, various modifications may be made to the embodiments described below. It should be understood that the examples described below are not intended to limit the embodiments, and include all modifications, equivalents, or substitutes thereof.

It will be described logically according to the drawings below.

1 is a perspective view of an inspection device according to an embodiment of the present invention.

Referring to Figure 1, the inspection equipment 10 of this embodiment includes a connecting portion 110, a first joint additive 120, a visual inspection unit 130, a second joint additive 140, a laser inspection unit 150, The connection part 110 may include a laser guide tube 111.

The connection part 110 is extended to a certain length and is inserted into the Kalandria reactor, and may be extended by forming a plurality of stages according to the depth of the reactor to be measured.

A laser guide tube 111 may be inserted through the connection part 110, and the laser guide tube 111 may form a passage through which the laser generated by the laser inspection part 150 moves to the visual inspection part 130. have.

Visual inspection unit 130 is provided on one side of the connection unit 110 is provided to be able to check the state of the pipe installed inside the nuclear reactor, it will be formed as a single housing forming a space for accommodating cameras, motors, etc. Can be.

That is, the visual inspection unit 130 may be in the form of various housings that form a constant receiving space for accommodating various equipment capable of inspecting the internal condition of Kalandria with the laser generated by the visual and laser inspection unit 150.

The laser inspection unit 150 is provided on the other side of the connection unit 110 to provide a laser light source to measure the state of the piping, and is formed as one housing that forms a space to accommodate various equipment for providing the laser light source Can be.

The first joint member 120 connects the connection unit 110 and the visual inspection unit 130, and the second joint member 140 may connect the connection unit 110 and the laser inspection unit 150, and the connection unit 110, The visual inspection unit 130 and the laser inspection unit 150 may be waterproofed and fastened.

The visual inspection unit 130 is provided to be rotatable about 360 degrees with respect to the connection unit 110, so that the internal inspection can be performed by rotating only the visual inspection unit 130 while the connection unit 110 is fixed.

2 is a perspective view of the visual inspection unit of FIG. 1, FIG. 3 is an enlarged side view of FIG. 2, and FIG. 4 is a front view of FIG.

2 to 4, the visual inspection unit 130 of this embodiment includes a reflection mirror 131, a camera 132, a motor 133, a lamp 134, a first holder 1110a, and a linear shaft. 1311, a driving section arm 1312, a connecting part 1313, and a rotating shaft bracket 1314 may be included.

The reflection mirror 131 is rotatably provided within a certain angular range at the bottom of the visual inspection unit 130, the motor 133, the linear shaft 1311, the drive arm 1312, the connection subsidiary 1313, the rotating shaft It can be rotated by the bracket 1314.

More specifically, power is provided by the motor 133, and the power is driven by pushing and pulling the linear shaft 187 on the inside and outside of the lower part of the visual inspection unit 130 to be pushed and pulled by the linear shaft 187. Power is transmitted to the section arm 1312.

The driving section arm 1312 is connected to one side of the connecting subsidiary 1313, pushing and pulling the connecting subsidiary 1313, and the other side of the connecting subsidiary 1313 is connected to the reflective mirror 131 so that the angle of the reflective mirror 131 is Can be controlled.

The rotating shaft bracket 1314 can adjust the maximum angle of the angle that the reflective mirror 131 forms with the lower surface of the visual inspection unit 130, and the reflective mirror 131 can be adjusted up to 90 degrees by the rotating shaft bracket 1314. have.

That is, looking at the transmission of power for controlling the angle of the reflection mirror 131 in order, power is generated from the motor 133, through the linear shaft 1311, the drive arm arm 1312, and the connection subsidiary 1313 It is transmitted to the reflective mirror 131 and the maximum angle of the reflective mirror 131 may be controlled by the rotating shaft bracket 1314.

The camera 132 may be inserted into the visual inspection unit 130 to photograph the state of the piping inside the Kalandria tube, and may be made of radiation resistant material to minimize the effect of high level radiation generated inside the Kalandria tube.

The lamp 134 may be inserted into the visual inspection unit 130 to generate lighting required for a user's visual inspection or a laser inspection, and preferably a halogen lamp.

The first holder 1110a may fix and support the laser guide tube 111, and the laser guide tube 111 may be provided through the visual inspection unit 130 therein.

That is, as described above, the laser generated by the laser inspection unit 150 can be guided through the laser guide tube 111 to the visual inspection unit 130 through the connection unit 110, and is dispersed and disappeared in the process where the laser is guided. The laser guide tube 111 may be formed to penetrate to the lower part of the visual inspection unit 130 to prevent it.

Meanwhile, the above-described camera 132, lamp 134, and laser guide tube 111 are provided at positions that do not interfere with each other, and more specifically, the lower surface of the visual inspection unit 130 is a camera hole 132h, a lamp hole. (134h), the laser guide tube hole (111h) is provided at a position that does not interfere with each other, it is possible to secure the field of view during inspection inside the Kalandria tube through each hole.

5 is a perspective view of the laser inspection unit of Figure 1;

5, the laser inspection unit 150 of the present embodiment includes a laser light emitting unit 151, a path variable additive 152, a driving driver 153, a horizontal additive 154, a vertical additive 155, and an eye bolt 156. ), The second holder 1110b and the path variable additive 152 may include a first path variable additive 152a and a second path variable additive 152b.

The laser light emitting unit 151 generates a laser, and the laser may be guided through a laser guide tube 111.

That is, the laser guide tube 111 may be provided to be penetrated to any part of the inside of the laser inspection part 150, and the laser guide tube 111 may be connected to the connection part 110 or the visual inspection part 130 from any part of the inside of the laser inspection part 150. ) May be provided through.

In addition, when the laser guide tube 111 is provided to penetrate to any part of the inside of the laser inspection unit 150, a second holder 1110b for fixing and supporting the laser guide tube 111 may be provided.

The path variable additive 152 may change the movement path of the laser generated by the laser light emitting unit 151 at least once, and the laser whose path changed by the path variable additive 152 may be a laser guide tube 111. It may be moved along, and may include a first path variable additive 152a and a second path variable additive 152b.

The first path variable additive 152a can change the movement path of the laser generated by the laser light emitting unit 151, and the second path variable additive 152b is the laser variable through the first path variable additive 152a. You can change the movement path of

More specifically, the first path variable additive 152a is provided at a position where the laser generated by the laser light emitting unit 151 goes straight and abuts to change the movement path of the laser, and the second path variable additive 152b is the first. The moving path of the laser variable by the path variable additive 152a is variable to be provided at a position where the laser can be guided to the laser guide tube 111 to change the moving path of the laser.

The driving driver 153 may control the positions of the first path variable additive 152a and the second path variable additive 152b, and may adjust the angle at which the laser movement path varies depending on the user's needs.

More specifically, the laser light emitting unit 151 generates a red wave having a wavelength of 630 nm, and the driving driver 153 controls the positions of the first path variable additive 152a and the second path variable additive 152b. The red wave is reflected 90 degrees by the first path variable additive 152a, and 90 degrees reflected by the second path variable additive 152b, and then can be moved to the visual inspection unit 130 through the laser guide tube 111. .

However, the control of the movement path of the laser by the above-described laser light emitting unit 151 and the path variable agent 152 is only one embodiment, and is not necessarily limited to the above-described embodiment, and the laser may be used according to the user's needs. The wavelength generated by the light emitting unit 151 may be different, and the adjustment of the angle by the path variable additive 152 may be selected differently.

The horizontal subagent 154 and the vertical subagent 155 may prevent interference of a cable provided inside the laser inspection unit 150, and the horizontal subagent 154 is provided on the upper side of the path variable subagent 152 to provide a laser inspection unit ( 150) Interference of a cable provided therein can be prevented.

That is, the horizontal subtraction unit 154 and the vertical subtraction unit 155 move the laser in a section in which the laser generated by the laser light emitting unit 151 moves to the laser guide tube 111 by changing the path by the path variable subagent 152. It can be provided to prevent various elements that may interfere with.

To measure the gap between the Kalandria tube (CT) and the liquid toxin injection tube (LIN), the visual inspection unit 130 is provided at a position perpendicular to the Kalandria tube, which is orthogonal to the liquid toxin injection tube. By adjusting the fine angle so that it can be provided at the position, the crossing angle between the calandria tube and the liquid poison tube can be calculated using the shortest distance of the calandria tube, the liquid poison tube and the visual inspection unit 130.

On the other hand, it is possible to use the shortest distance by adjusting the fine angle so that it is provided at a position perpendicular to one of the Kalandria tube and the liquid poisoning tube and then placed at a position perpendicular to the other. It cannot be regarded as being bound by the above-described order.

That is, through the camera 132 of the visual inspection unit 130, it is possible to check the state of the piping (calandrian tube, liquid poisoning tube), and the shortest distance calculation between the calandia tube and liquid poisoning tube is a laser inspection unit ( 150).

On the other hand, the present invention is not limited by the embodiments of the present invention and the accompanying drawings in the above description, it is apparent to those skilled in the art that various substitutions, modifications and changes are possible without departing from the technical spirit of the present invention. something to do.

10: inspection equipment
110: connection
111: laser guide tube
111h: laser guide tube hole
1110a: 1st holder
1110b: Second holder
120: first joint additive
130: visual inspection department
131: reflective mirror
1311: linear shaft
1312: drive arm
1313: Connection subtitle
1314: rotating shaft bracket
132: camera
132h: Camera Hall
133: motor
134: lamp
134h: Lamp hall
140: second joint
150: laser inspection unit
151: laser light emitting unit
152: path variable subtitle
152a: 1st path variable additive
152b: Second path variable additive
153: driving driver
154: horizontal subtitle
155: vertical subtitle

Claims (7)

delete delete delete A connection part extending into a constant length and inserted into the Kalandria reactor;
A visual inspection unit provided on one side of the connection unit and provided to check a state of a pipe installed inside the nuclear reactor;
A laser inspection unit provided on the other side of the connection unit to provide a laser light source to measure the state of the pipe; And
Includes a reflective mirror rotatably provided within a certain angular range at the bottom of the visual inspection unit,
The connecting portion,
And a laser guide tube inside which the laser moves.
The laser guide tube is provided through the visual inspection unit,
The laser inspection unit,
A laser light emitting unit generating the laser; And
It includes; a path variable agent for changing at least one or more movement paths of the laser generated by the laser light emitting part.
The laser for which the movement path is changed through the path variable agent moves along the laser guide tube.
The method of claim 4,
The pathway variable adjuvant,
A first path variable agent that changes a movement path of the laser generated by the laser light emitting unit;
A second path variable additive that changes the movement path of the laser variable through the first path variable additive; And
A driving device for controlling the positions of the first path variable additive and the second path variable additive; an inspection device for measuring the gap between the heavy water channel and the liquid poisoning tube.
The method of claim 4,
A horizontal subagent provided on the upper side of the variable path part to prevent interference of a cable provided inside the laser inspection part; And
Inspection for measuring the gap between the Kalandria tube and the liquid toxic injection tube, characterized in that it further comprises; a vertical sub-agent provided on one side of the path variable portion to prevent interference of the cable provided inside the laser inspection portion equipment.
delete

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