KR20130097407A - Cutting device for frame of spent nuclear fuel assembly - Google Patents

Abstract

PURPOSE: A cutting device for a spent nuclear fuel assembly skeleton is provided to dismantle or shear a workpiece in a state of being stably mounted on a workpiece meshing jig part for minimizing a damage to a spacer grid or a connection portion between the spacer grid and a guide tube/measuring tube, thereby enabling a stable and correct mechanical examination on the spent nuclear fuel assembly skeleton. CONSTITUTION: A cutting device (100) for a spent nuclear fuel assembly skeleton comprises a workpiece meshing jig part (140) on which a workpiece (W) included in the spent nuclear fuel assembly skeleton is mounted; a workpiece conveyor (120) which the workpiece meshing jig part is detachably mounted on and transported to the left and right by; a shear part (150) with a rotating shear (153) to cut the workpiece mounted on the jig meshing part; a shear conveyor (160) to move the shear part to the front and back such that the workpiece is cut by the shear part; and a base frame (110) in which the workpiece conveyor and the shear conveyor are installed.

Description

CUTTING DEVICE FOR FRAME OF SPENT NUCLEAR FUEL ASSEMBLY}

The present invention relates to a device for cutting / dismantling spent nuclear fuel skeletons in a hot cell, and more particularly, to guide tubes, measuring tubes, support grids, and research reactors of spent nuclear fuel skeletons dismantled in a tank. Nuclear fuel assembly and various capsules irradiated in (HANARO)}, etc. are cut / disassembled in a hot cell, and the present invention relates to a nuclear fuel skeletal cutting device for performing various mechanical tests, fuel performance tests, and post-irradiation tests of capsules.

One example of a fuel assembly and its components used in a reactor is shown in FIGS. 1 and 2. 1 is a front schematic view of a general fuel assembly, and FIG. 2 is a plan view of the main configuration of a spent fuel skeleton.

Referring to FIG. 1, the nuclear fuel assembly 20 includes, for example, an upper fixing body 4, a lower fixing body 5, a support grid 2, a guide tube 3, a measuring tube 6, and the like. It is composed of a fuel skeleton (supporting lattice) 10 is configured to form a skeleton of the fuel assembly 20, and the fuel rod 21 is charged in the support lattice (2) and installed in the support lattice (2).

Referring to FIG. 2, the support grid 2 is formed in a grid so as to partition a space in which a plurality of fuel rods (21 in FIG. 1) may be charged. In addition, the guide tube 3 provides a path through which a control rod (not shown) having neutron absorbing capacity is inserted in the reactor, and the measurement tube 6 provides a path through which a measurement rod (not shown) is inserted.

At this time, the guide tube (3) and the measuring tube (6) is formed in the form of a long tube and inserted into the grid (grid) inside the support grid (2) and then fixed by the support grid (2) and welding, etc. nuclear fuel skeleton While forming a portion of the sieve 10 is constrained the movement of the nuclear fuel skeleton (10).

On the other hand, the spent fuel skeleton (10) is the support grid (2) itself to form the fuel skeleton (10) by neutron irradiation, and the support grid (2) and the guide tube (3) / measuring tube (6) The welds and joints are very fragile.

Therefore, there is a need to confirm the stability of the spent fuel skeleton 10 through various mechanical tests on the weak parts of the spent fuel skeleton 10.

For the mechanical test, it is necessary to cut a portion of the support lattice 2, which is the weakest portion of the spent fuel skeleton 10, from which the fuel rod 21 is separated, to a certain size. The tube 3 and the measurement tube 6 are cut.

The cutting operation of the spent nuclear fuel skeleton 10 is performed in a deep water tank due to the fear of exposure.

The spent nuclear fuel skeleton (10) and the support grid (2) cut in water in this way should be cut and dismantled to suit various mechanical tests (tensile test, buckling test, specification measurement, etc.). In addition, nuclear fuel assemblies and irradiation capsules irradiated from research reactors (Hanaro) need to be cut and dismantled for various tests.

The cutting / dismantling operation should be performed in the hot cell to prevent exposure, but conventionally, there was no device capable of cutting / disassembling such a fuel skeleton 10, the support grid, the fuel assembly and the irradiation capsule in the hot cell.

The present invention has been made to solve at least some of the problems of the prior art as described above, an object of the present invention is to provide a cutting device for spent nuclear fuel skeleton that can cut / dismantle the spent fuel skeleton and support grid in a hot cell It is done. In particular, the present invention can minimize damage or damage to the support lattice itself or the connection portion between the support lattice and the guide tube / measuring tube when cutting / dismantling the spent fuel skeleton, etc. The aim is to enable accurate mechanical testing and the like.

In addition, an aspect of the present invention is to provide a cutting device for spent nuclear fuel skeleton body that can replace the workpiece bite jig to enable cutting / disassembly of the support grid of the various types of spent nuclear fuel skeleton. In particular, it is an object of the present invention to provide a cutting device for spent fuel skeletons capable of cutting / disassembling irradiated fuel assemblies and irradiated capsules, as well as spent nuclear fuel skeletons, by changing the shape of the workpiece bite jig. .

In addition, an object of the present invention is to provide a cutting device for spent nuclear fuel skeleton which is easy to mount the workpiece bite jig portion as one aspect.

In addition, the present invention, in one aspect, cutting for spent nuclear fuel skeleton that can prevent the highly radioactive material from contaminating the inside of the hot cell and various devices, such as by various dust generated during the cutting / dismantling of the spent nuclear fuel skeleton, etc. It is an object to provide a device.

As one aspect for achieving the above object, the present invention is a workpiece bite jig unit is mounted with at least one workpiece of the tube, support grid, irradiation capsule provided in the spent nuclear fuel skeleton; A workpiece transfer part which is detachably mounted to the workpiece bite jig part and is transported in left and right directions; A cutting unit having a rotary cutting mechanism to cut a workpiece mounted to the workpiece biting jig unit; A cutting feeder for moving the cutting part in the front-rear direction so that the workpiece is cut through the cutting part; And a base frame on which the workpiece transfer unit and the cutting transfer unit are installed, wherein the cutting of the workpiece by the cutting unit is performed inside the hot cell, and the driving of the workpiece transfer unit, the cutting unit, and the cutting transfer unit is adjusted outside the hot cell. It provides a cutting device for spent nuclear fuel skeleton.

Preferably, the cutting device for spent nuclear fuel skeleton according to an aspect of the present invention is a rotary cutting mechanism provided in the cutting portion, and a pollution prevention cover portion installed to cover the workpiece to be cut through the rotary cutting mechanism; It may include.

More preferably, the anti-fouling cover part may include a fixing part having one end fixed to the base frame and a rotating part hinged to one side of the fixing part and having a through opening through which a workpiece penetrates. In this case, the rotating part may include a handle for rotating the rotating part, and a cover extension part extending from the through opening to the workpiece transfer part.

Preferably, the workpiece transfer part may be provided on the workpiece transfer part and moved to the left and right together with the workpiece transfer part, and may include a workpiece rotating part rotating the workpiece bite jig part mounted on the workpiece transfer part.

Also preferably, a cutting device for spent nuclear fuel skeleton according to an aspect of the present invention includes a water tank containing cutting oil supplied to the rotary cutting mechanism, and a pump for pressurizing the cutting oil contained in the water tank to the rotary cutting mechanism. It may further include; cutting oil supply unit having a.

More preferably, the scrap device for spent nuclear fuel skeleton according to an aspect of the present invention, the scrap is provided on top of the tank, the scrap collection tank having a scrap hole formed to separate the scrap falling from the rotary cutting mechanism with the cutting oil It may further include a processing unit.

Preferably, the cut portion may include a vertical adjustment portion for transferring the cut portion in the vertical direction.

On the other hand, the workpiece transfer part has a jig fixing member to which the jig body of the workpiece bite jig portion is mounted, the jig fixing member is a fixed projection protruding toward the workpiece bite jig portion to adjust the engagement position of the workpiece bite jig portion, After the mounting mechanism provided in the jig body rotates, the jig main body and the jig fixing member may be provided with a fixing groove formed to tighten the coupling.

At this time, the mounting mechanism may be provided with a rotating shaft member connected to the jig main body at one end and a handle for fastening and coupling the jig main body and the jig fixing member at the other end.

Preferably, the workpiece bite jig portion may be provided with a hook hook so that the removal work of the workpiece bite jig portion can be easily made by a crane or a robot.

Also preferably, the drive motor for driving the rotary cutting mechanism may be connected to the electrical wiring and / or control device via a connector to facilitate replacement.

According to an embodiment of the present invention having such a configuration, the cutting / dismantling operation is performed in a state that the workpieces, such as pipes, support grids, irradiation capsules, etc., provided in the spent nuclear fuel skeleton are stably mounted on the workpiece bite jig part. The damage or damage to the support grid itself or the connection part between the support grid and the guide tube / measurement tube can be minimized, so that stable and accurate mechanical testing of spent fuel skeleton can be obtained.

In addition, according to an embodiment of the present invention, since the cutting / dismantling operation is performed in a state in which the cutting part of the workpiece is covered with the anti-fouling cover, high dust due to various dusts generated during cutting / dismantling of spent fuel skeleton, etc. It is possible to prevent the radioactive material from contaminating the inside of the hot cell and various devices.

And, according to an embodiment of the present invention, by providing a workpiece rotating portion for rotating the workpiece bite jig equipped with the workpiece can be effectively cut the portion to be cut.

In addition, according to an embodiment of the present invention, a large amount of foreign matter is generated in the high-level radiation filter of the hot cell due to the phenomenon that the workpiece is caught in the rotary cutting mechanism, dust, etc. compared to when the cutting oil is not supplied by supplying the cutting oil to the rotary cutting mechanism. Therefore, the life of the filter can be prevented from being shortened.

In addition, according to one embodiment of the present invention, since the workpiece conveying part, the cutting part, and the cutting conveying part are installed inside the hot cell, and the driving of the workpiece conveying part, the cutting part, and the cutting conveying part is adjusted through a control box outside the hot cell, the highly radioactive material It is possible to prevent the exposure caused by. Furthermore, stable work can be performed without exposure because the work of fixing the workpiece to the workpiece biting jig, mounting the workpiece bite jig to the workpiece conveying part, opening and closing of the anti-fouling cover, etc. is performed through a crane or robot that is remotely controlled from the outside of the hot cell. Can be obtained.

In addition, according to one embodiment of the present invention, the position of the workpiece bite jig portion can be easily adjusted through the fixing projection formed on the jig fixing member, and in this state, the mounting mechanism of the jig body to cross the fixing groove of the jig fixing member. After performing the tightening operation there is an effect that easy removal of the workpiece bite jig. In particular, by providing the hook hook to the workpiece bite jig portion is easy to move and install the workpiece bite jig portion when the workpiece bite jig detachment.

In addition, according to an embodiment of the present invention, the workpiece of various forms depending on the shape of the workpiece (for example, the guide tube / measurement tube, support grid, irradiation capsule provided in the spent fuel skeleton) or the position to be cut By manufacturing the bite jig portion, and by installing the workpiece bite jig portion in the workpiece transfer portion there is an effect that it is possible to cut / dismantle the various types of work inside the hot cell.

In addition, according to an embodiment of the present invention, since the various drive motors are connected to the electric wiring and the control device by the connector, it is possible to obtain an effect of easy replacement of the drive motors.

1 is a front schematic view of a typical fuel assembly.
2 is a plan view of the main configuration of the spent fuel skeleton.
Figure 3 is a perspective view showing the main configuration of the cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.
4A and 4B are front views of the cutting device for the spent fuel skeleton shown in FIG. 3 (the workpiece conveyance is shown in cross section), and FIG. 4A shows the state before the workpiece conveyance approaches the cut and FIG. 4B is Shows the position of the workpiece conveyance in the state where the workpiece is cut.
Fig. 5 shows the workpiece conveying part shown in Figs. 4A and 4B, where (a) is a left side view and (b) is a front sectional view.
FIG. 6 is a plan view of the cutting device for the spent fuel skeleton shown in FIG. 3 (some configurations of the workpiece conveyance are shown in cross section); FIG.
7 is a plan view of the cutout shown in FIGS. 4A and 4B.
Figure 8 is a schematic diagram showing the operating state of the antifouling cover shown in Figures 4a and 4b, (a) shows a state immediately before the antifouling cover is closed and (b) shows a state in which the antifouling cover is closed. box.
Fig. 9 is a right side view showing the structure of the cutting feed unit shown in Figs. 4A and 4B.
Figure 10a is a front sectional view showing an example of the workpiece bite jig portion applicable to the cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.
Fig. 10B is a left side view of the workpiece bite jig portion shown in Fig. 10A;
Figure 11a is a front sectional view showing a modification of the workpiece bite jig portion applicable to the cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.
Fig. 11B is a left side view of the workpiece bite jig portion shown in Fig. 11A;
Figure 12a is a front sectional view showing a modification of the workpiece bite jig portion applicable to the cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.
Fig. 12B is a left side view of the workpiece bite jig portion shown in Fig. 12A;
Figure 13a is a front sectional view showing a modification of the workpiece bite jig portion applicable to the cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.
Fig. 13B is a plan view of the workpiece bite jig portion shown in Fig. 13A;

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

In this specification, the terms "comprise", "comprise", "have" and the like are intended to designate that there is a component described in the specification or a combination thereof, and one or more other features. It is to be understood that the present invention does not exclude the possibility of addition or possibility of adding elements, components, or a combination thereof.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

First, with reference to Figures 3 to 10b looks at the cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.

Figure 3 is a perspective view showing the main configuration of the cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention showing a state in which the workpiece bite jig is not mounted, Figures 4a and 4b is shown in FIG. 4A shows the state before the workpiece feeder approaches the cutting portion, and FIG. 4B shows the position of the workpiece feed portion in the state where the workpiece is cut and the workpiece feeder is shown in cross section. It was. In addition, Figure 5 shows the workpiece conveying portion shown in Figures 4a and 4b, (a) is a left side view, (b) is a front sectional view, Figure 6 is a cutting device for the spent fuel skeleton shown in Figure 3 As a plan view, some components of the workpiece conveyance are shown in cross section, and FIG. 7 is a plan view of the cutting portion shown in FIGS. 4A and 4B. In addition, Figure 8 is a schematic diagram showing the operating state of the anti-fouling cover shown in Figures 4a and 4b, (a) shows a state immediately before the anti-fouling cover is closed and (b) is a closed state Figure 9 is a right side view showing the configuration of the cutting transfer unit shown in Figures 4a and 4b, Figure 10a is a workpiece bite applicable to the cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention It is a front sectional view which shows an example of a jig part, and FIG. 10B is a left side view of the workpiece bite jig part shown in FIG. 10A.

As shown in Figure 3 to 10b, the cutting device 100 for spent nuclear fuel skeleton according to an embodiment of the present invention is a workpiece bite jig 140, the workpiece conveyance unit 120, the cutting unit 150, cutting It includes a transfer unit 160, the base frame 110, and may further include a pollution prevention cover 170, a cutting oil supply unit 180, and a scrap processing unit 190. At this time, the cutting of the workpiece (W) by the cutting unit 150 is performed in the hot cell in order to prevent the radiation exposure during the cutting / dismantling operation, the workpiece transfer unit 120, the cutting unit 150 and the cutting transfer unit 160 The driving of is controlled through a control box (control unit) (not shown) or the like outside the hot cell. In addition, the workpiece (W) is mounted on the workpiece bite jig unit 140, or the workpiece bite jig 140 is detached to the workpiece conveying unit 120, the opening and closing of the pollution prevention cover 170, scrap processing unit 190 Removal of scrap from the work is performed by remotely controlling the crane or robot installed inside the hot cell from the outside of the hot cell.

On the other hand, the workpiece (W) to be cut in the cutting device 100 according to an embodiment of the present invention is a tube provided in the spent fuel skeleton 10 as shown in Figure 1 and 2 {eg, Guide tube (3), measurement tube (6), etc.} or a support grid (2), and the irradiation capsule (not shown) may include any one. In order to perform the cutting / dismantling operation of the workpiece, the workpiece bite jig unit 140 may have a structure suitable for cutting / disassembling the respective workpieces as shown in FIGS. 10A to 13B.

On the other hand, the present invention is named as a cutting device 100 for spent nuclear fuel skeleton, but the workpiece to be cut in the present invention is cut in a hot cell in order to prevent the coating, such as irradiation capsules, as well as various components provided in the spent fuel skeleton. Includes various workpieces to be dismantled.

That is, the cutting device 100 according to the present invention should be understood as a cutting device 100 for various workpieces that need to be cut / dismantled in a hot cell due to radioactive contamination.

First, referring to FIGS. 4A and 4B, the workpiece bite jig unit 140 may include a tube (eg, a guide tube, a measuring tube, etc.) or a support grid provided on the spent fuel skeleton as described above. At least one workpiece W of the capsule is mounted. To this end, the workpiece bite jig unit 140 is configured to maintain the correct state of the workpiece, it is preferable to have a configuration that can be easily mounted on the workpiece transfer unit (120).

The specific configuration of the workpiece bite jig 140 will be described later with reference to FIGS. 10A to 13B.

3 and 6, the workpiece transfer part 120 is configured such that the workpiece bite jig 140 is detachably mounted and is transported in the horizontal direction.

In order to transfer in the left and right directions, the workpiece transfer part 120 includes a workpiece transfer driver 121, a rotary shaft member 122 that rotates by a driving force of the workpiece transfer driver 121, and the rotary shaft member 122. Connected to the transfer unit pedestal 129, which is linearly conveyed according to the rotation of the rotary shaft member 122, the housing 128 fixed to the transfer unit pedestal 129, and installed inside the housing 128 to provide a bearing (B). Rotating member 124 having a hollow space 124a and a jig connected to the conveying member pedestal 129 via the housing 128 and the rotating member 124 so as to be transferred together with the conveying pedestal 129. It includes a fixing member 125, the jig body 141 of the workpiece bite jig 140 is mounted to the jig fixing member 125 to be detachable.

At this time, the rotating shaft member 122 may be composed of a lead screw or a ball screw, but is not limited thereto if it is possible to convert the rotational force of the workpiece conveyance unit to linear movement.

In addition, as illustrated in FIG. 6, the transfer driving unit 121 includes a drive motor 121a that generates rotational force by electric application, a first rotating member 121b connected thereto, and the first rotating member 121b. To the second rotating member 121d that rotates according to the rotation of the rotating rod and the rotating connecting member 121c formed of a chain or a belt to connect the first rotating member 121b and the second rotating member 121d. It may be configured, but is not limited to this configuration if it can generate a rotational force. The first rotating member 121b, the second rotating member 121d, and the rotary connecting member 121c may be covered by a workpiece transfer part cover 126, and the driving motor 121a may be provided with a connector for ease of replacement. It is preferable to be connected to the electrical wiring and the control device through.

In addition, the workpiece transfer part 120 includes guide guides 123 formed on both sides or one side of the rotation shaft member 122 so as to guide or support the transfer unit pedestal 129 as the rotation shaft member 122 is transferred according to the rotation of the rotation shaft member 122. can do.

Looking at the jig fixing member 125 with reference to Figures 5 and 10a the jig fixing member 125 is a jig body of the workpiece bite jig portion 140 in order to adjust the engagement position of the workpiece bite jig 140 Fixed groove 125a protruding toward the side 141, and the fixing groove formed to tighten the jig body 141 and the jig fixing member 125 after the mounting mechanism 145 provided in the jig body 141 is rotated ( 125b).

Specifically, the fixing protrusion 125a is fitted into a fixing groove (not shown) formed in the jig body 141 of the workpiece biting jig 140 to adjust the coupling position of the workpiece biting jig 140. It may be performed using the hook hook 148 of the workpiece bite jig 140. In this case, various operations inside the hot cell, for example, mounting of the workpiece bite jig 140 may be performed by remotely controlling a robot or a crane installed inside the hot cell from a cockpit outside the hot cell.

After the workpiece bite jig 140 is positioned in the workpiece feeder 120, the mounting mechanism 145 of the workpiece bite jig 140 is rotated about the rotary shaft member 145a using a crane or a robot installed in the hot cell. The mounting mechanism 145 is brought into contact with the fixing groove 125b of the jig fixing member 125 (see FIG. 10A), and in this state, the handle 145b of the mounting mechanism 145 is turned to rotate the jig fixing member 125. To ensure a tight tightening of the jig body 141 is made. The number of the fixing protrusion 125a, the fixing groove 125b, and the mounting mechanism 145 may be appropriately selected in consideration of the shape of the workpiece biting jig 140 or the shape of the workpiece.

As such, the cutting device 100 for spent nuclear fuel skeleton according to an embodiment of the present invention forms a fixing protrusion 125a and a fixing groove 125b in the jig fixing member 125 and is rotatable mounting mechanism 145. Through the workpiece bite jig unit 140 can be easily mounted to the workpiece transfer unit 120 or can be easily removed from the workpiece transfer unit 120.

On the other hand, the workpiece transfer part 120 is installed in the workpiece transfer part 120 and is moved to the left and right together with the workpiece transfer part 120, the workpiece bite jig unit 140 mounted on the workpiece transfer part 120. It may be provided with a workpiece rotating portion 130 to rotate.

4A to 6, the workpiece rotating part 130 may include a workpiece rotating driver 131 that provides a rotation driving force and a workpiece rotating driver cover 135 that surrounds the workpiece rotating driver 131.

Specifically, the workpiece rotation driving unit 131 rotates according to the rotation of the driving motor 131a, the first rotating member 131b connected thereto, and the first rotating member 131b to generate rotational force by electric application. The second rotary member 131d and the first rotary member 131b and the second rotary member 131d to connect the rotary connecting member 131c consisting of a chain or a belt, but the rotational force If it can occur is not limited to such a configuration.

At this time, the second rotating member 131d is coupled to the rotating member 124 to rotate the rotating member 124 according to the rotation of the driving motor 131a, thereby causing a workpiece bite mounted on the rotating member 124. The jig body 141 of the jig unit 140 and the workpiece (W) fixed thereto is rotated.

In addition, the driving motor 131a is installed in the feeder support 129 of the workpiece transporter 120, so that the workpiece rotation part 130 may be transported together with the workpiece transporter 120, through a connector for ease of replacement. It is desirable to be connected to the electrical wiring and the control device.

In this way, by installing the workpiece rotating portion 130 that can rotate the workpiece (W) in the workpiece transfer unit 120 it is possible to adjust the cutting position of the workpiece (W). In particular, in order to prevent breakage or deformation of the workpiece through cutting / dismantling of the inside of the hot cell, the cutting portion 150 of the workpiece W has the same height as the rotation axis of the rotary cutting mechanism 153 of the cutting portion 150. It is preferable to maintain, and by adjusting the cutting position of the workpiece through the workpiece rotating portion 130 it is possible to minimize the damage or damage of the workpiece being cut / dismantled.

In addition, the cutting part 150 includes a rotary cutting mechanism 153 for cutting the work W mounted on the workpiece biting jig 140. The rotary cutting tool 153 may be a rotary cutting tool of various types such as a diamond wheel, an abrasive wheel (abrasive wheel).

4A, 4B, 6, and 7, the cutting unit 150 may include a cutting driving unit 151 for rotating the rotary cutting mechanism 153 and a rotational force of the cutting driving unit. The rotating shaft member 152 to be transmitted to the 153, the rotating shaft housing 156 for receiving the rotating shaft member 152 through the bearing (B) so as to be rotatable, and the rotating cutting mechanism 153 to the rotating shaft member ( It may be provided with a fastening mechanism 154 having a rotary handle for fixing to 152. In addition, the cutting unit 150 covers the rotary cutting mechanism 153 and the rotary cutting mechanism cover 157, which is transferred together with the rotary cutting mechanism 153, the cutting transfer unit 160, and the vertical adjustment unit 159. It may be provided with a transfer mounting member 158 connected by a medium.

Here, the cutting driving unit 151 is rotated in accordance with the rotation of the drive motor (151a), the first rotating member 151b and the first rotating member (151b) connected to generate a rotational force by the application of electricity. In order to connect the second rotating member 151d and the first rotating member 151b and the second rotating member 151d, the rotating connecting member 151c formed of a chain or a belt may be used. If so, it is not limited to this configuration. The first rotation member 151b, the second rotation member 151d, and the rotation connection member 151c may be covered by the cutting driver cover 155. In addition, the drive motor 151a is preferably connected to the electrical wiring and the control device through the connector (C) for ease of replacement.

On the other hand, the cutting unit 150 may further include a vertical adjustment unit 159 to enable the vertical movement of the rotary cutting mechanism 153.

The vertical adjustment unit 159 may be configured to finely adjust the relative position of the rotary cutting mechanism 153 and the workpiece by finely moving the transfer mounting member 158 in which the rotary shaft housing 156 is installed.

As shown in detail in FIG. 9, the up and down adjustment unit 159 is connected to the cutting transfer unit 160 to be described later, the body 159a and is transferred in the front and rear direction, and the adjustment knob 159d installed in the body 159a. And a position adjusting member 159b that rotates according to the rotation of the adjusting knob 159d to elevate the transfer mounting member 158 up and down, and a guide guide 159c for guiding the movement of the transfer mounting member 158. It may be configured to include).

As shown in FIG. 3, the scale 159e is adjacent to the adjustment knob 159b so as to finely adjust the vertical position of the cutting part 150 by rotating the adjustment knob 159b using a crane or a robot. Can be formed. However, the vertical movement of the cutting unit 150 is not only a configuration for manually adjusting the adjustment knob 159d by remotely controlling a crane or a robot outside the above-described hot cell, but also installing a drive motor and controlling a control box (control unit) (not shown). It is also possible to configure to control the drive of the drive motor through.

Next, the cutting transfer unit 160 is configured to move the cutting unit 150 in the front-rear direction so that the cutting of the workpiece through the cutting unit 150 is made.

As shown in FIGS. 4A, 4B, 6 and 9, the cutting transfer unit 160 may include a cutting transfer driving unit 161 for generating a driving force for forward and backward movement of the cutting unit 150, and the cutting transfer driving unit ( It may be configured to include a rotating shaft member 162 for transmitting the rotational force of the 161 to the cutting unit 150, and a guide guide 163 for guiding the front and rear conveyance of the cutting unit 150.

Here, the cutting feed driving unit 161 is rotated in accordance with the rotation of the drive motor (161a), the first rotating member 161b and the first rotating member (161b) connected to generate a rotational force by the application of electricity. The second rotary member 161d and the rotary connecting member 161c formed of a chain or a belt, etc. to connect the first rotary member 161b and the second rotary member 161d, but the rotational force If it can occur is not limited to such a configuration. The first rotation member 161b, the second rotation member 161d, and the rotation connection member 161c may be covered by the cutting transfer driver cover 165. In addition, the drive motor 161a is preferably connected to the electrical wiring and the control device through the connector (C) for ease of replacement.

The cutting transfer unit 160 is moved slowly when cutting the work (W) to minimize the impact on the work (W), it is preferable to prevent the jamming between the rotary cutting mechanism 153 and the work (W). Do.

In addition, the base frame 110 is fixed to the workpiece conveying unit 120 and the cutting conveying unit 160, the workpiece bite jig unit 140 or replacement for the workpiece shape so as to enable cutting of various workpieces Drive motors may be installed.

In addition, at least a portion of the anti-fouling cover 170, the cutting oil supply unit 180, and the scrap processing unit 190 may be installed in the base frame 110.

The cutting oil supply unit 180 includes a water tank 185 for accommodating the cutting oil supplied to the rotary cutting mechanism 153 and cutting the oil contained in the water tank 185 as shown in FIGS. 4A and 4B. A pump 181 pressurized to be supplied to the mechanism 153, a cutting oil spray nozzle 183 for spraying the cutting oil pressurized by the pump 181, and the pump 181 and the cutting oil spray nozzle 183 are connected to each other. The cutting oil supply pipe 182 and the opening and closing valve 184 to open and close the cutting oil supply pipe 182 may be configured. By supplying the cutting oil to the rotary cutting mechanism 153 through the cutting oil supply unit 180, a high-level radiation filter of the hot cell due to a phenomenon such as a phenomenon in which the workpiece is caught in the rotary cutting mechanism 153 or dust, etc. Many foreign matters can be prevented from shortening the filter life.

In addition, the anti-fouling cover 170 is shown in Figure 4a, 4b, 6, 7 and 8, the rotary cutting mechanism 153 provided in the cutting unit 150, and the rotary cutting mechanism 153 is provided so as to cover the work (W) to be cut. The anti-fouling cover 170 may not only prevent cutting oil or cutting chips containing high-level radioactive material from cutting to other components of the spent fuel cutting device 100 for cutting, but also dust generated during cutting. This prevents the inside of the hot cell from being contaminated.

The anti-fouling cover 170 is rotated by a hinge coupled to one end of the fixing portion 171 is fixed to the base frame 110, through a hinge portion 173 on one side of the fixing portion 171, the workpiece penetrates. It may be provided with a rotating part 175 is formed through the through opening 177.

In this case, the pivot 175 may include a handle 178 for pivoting the pivot body 176 and a cover extension 179 extending from the through opening 177 toward the workpiece transfer part 120. Can be.

The cover extension 179 minimizes the leakage of dust and the like between the workpiece bite jig 140. On the other hand, the sealing member (149 in Fig. 10a) to the gap between the cover extension portion 179 in the workpiece bite jig 140 to more securely prevent the dust and the like leakage to the outside of the pollution prevention cover portion 170 It is also possible to install the configuration.

And, the anti-fouling cover portion 170 may be configured such that the portion adjacent to the cut portion 150 is closed by the rotary cutting mechanism cover 157 of the cut portion 150, as shown in Figure 7, the cut portion 150 The rotary cutting device 153 and the rotary cutting device cover 157 are moved inside the pollution prevention cover part 170.

In addition, the scrap processing unit 190 is installed in the lower portion of the base frame 110, as shown in Figure 3, 4a and 4b. The scrap processing unit 190 may be provided with a scrap collection tank 191 is provided above the water tank 185, the separation hole 192 is formed to separate the scrap falling from the rotary cutting mechanism 153 with the cutting oil.

Therefore, the scrap collected by the separation hole 192 remains in the scrap collection tank 191, and the cutting oil from which the scrap is removed is supplied to the water tank 185, and is again supplied to the rotary cutting mechanism 153 by the pump 181. Supplied.

In addition, a handle 193 may be formed at one side of the scrap collection tank 191 in order to discard the scraps filtered by the scrap collection tank 191, and when the handle 193 is pulled, the scrap collection tank 191 may include a guide 194. Slid along) may be separated from the base frame (110).

Next, with reference to Figures 10a to 13b, looks at with respect to the workpiece bite jig 140 mounted to the workpiece conveyance unit 120 of the cutting device 100 for spent nuclear fuel skeleton according to the present invention.

First, FIGS. 10A, 10B, 11A, and 11B are views of the workpiece biting jig unit 140 for cutting the measurement pipe P1 or the guide pipe P2 provided in the support grid A as the work W. FIG. An example is shown.

The workpiece bite jig 140 is a jig body 141 is formed with a space for mounting the workpiece (W), and the jig body 141 is installed on one side of the jig body 141 is a jig of the workpiece transfer unit 120 It is provided with a mounting mechanism 145 to be fixed to the fixing member (125).

As described above, the mounting mechanism 125a of the jig fixing member 125 is fitted into a fixing groove (not shown) formed in the jig body 141 so that the mounting mechanism is adjusted in a state where the jig body 141 is adjusted. The 145 is rotated about the rotation shaft member 145a to be in contact with the fixing groove 125b of the jig fixing member 125. In this state, the handle 145b of the mounting mechanism 145 is rotated so that the jig fixing member 125 and the jig main body 141 are firmly coupled.

In addition, the workpiece bite jig unit 140 may be provided with a hook hook 148 so that the detachable work of the workpiece bite jig 140 can be easily performed by a crane or a robot.

In addition, the jig body 141 may include a through hole (141a) to support the pipe (P1, P2) for the stable installation of the workpiece, the jig body 141 and the workpiece (W) in close contact fixed The adhesion adjusting member 142 may be provided to maintain the state. The close adjustment member 142 is preferably provided with an elastic means (S) is configured so that excessive tightening force does not act on the workpiece (W). In addition, the auxiliary plate 144 may be provided between the adhesion adjusting member 142 and the work W so that a uniform tightening force is applied to the work W.

In addition, the workpiece biting jig 140 is a support member 143 is formed with an opening through which the pipes (P1, P2) so as to stably support the pipes (P1, P2) when the workpiece (W) is cut / dismantled ) May be further provided.

Meanwhile, the workpiece bite jig 140 is clamped as shown in FIGS. 11A and 11B to more stably support the pipes P1 and P2 so that the impact transmitted to the pipes P1 and P2 is minimized during cutting. Means 146 may be provided.

Next, FIGS. 12A and 12B show an example of a workpiece bite jig 140 for mounting a cylindrical workpiece W, such as a pipe P or an irradiation capsule. 12A and 12B, the jig body 141 has a space for supporting the tube, and the clamping member 146 is tightened through the close adjustment member 142 to fix the cylindrical work W. It becomes possible. At this time, it is preferable that the elastic means S is installed in the clamping member 146 so that the excessive tightening force by the clamping member 146 is not applied to the work W. On the other hand, since the configuration of the mounting mechanism 145 and the like is the same as in Figures 10a and 11a will be omitted detailed description.

Finally, FIGS. 13A and 13B illustrate an example of the workpiece bite jig 140 for fixing the support grid A when the support grid A is cut as the work W. FIG.

Even in the case of the workpiece bite jig 140, a space in which the workpiece W is seated is formed in the jig body 141, and the support member 143 is installed after the workpiece W is installed in the jig body 141. The work W is prevented from being separated outward. On the other hand, the configuration of the mounting mechanism 145, the close adjustment member 142 and the like are the same as in Figures 10a and 11a will be omitted detailed description.

It looks at the action of the cutting device 100 for spent nuclear fuel skeleton having the configuration as described above.

First, the workpiece (W) containing the radioactive material such as spent nuclear fuel skeleton, support grid, irradiation capsule, cut in water is moved into the hot cell.

Such a workpiece (W) is fixed to the workpiece bite jig portion 140 to prevent the impact during the irradiation embrittlement and cutting of the measuring pipe (P1) or guide pipe (P2) welding during cutting / dismantling operation and to maintain a fixed state .

As such, the workpiece biting jig unit 140 to which the workpiece is fixed is mounted to the workpiece conveying unit 120 using a crane or a robot. At this time, the fixing protrusion 125a of the jig fixing member 125 is fitted into a fixing groove (not shown) formed in the jig body 141 so that the mounting mechanism 145 is mounted in a state where the jig body 141 is adjusted. It rotates about the rotating shaft member 145a to contact the fixing groove 125b of the jig fixing member 125, and in this state, the handle 145b of the mounting mechanism 145 is rotated, and the jig fixing member 125 and the jig are rotated. Ensure a solid coupling of the body (141).

Thereafter, the workpiece transfer part 120 is transferred to the cutting part 150 to adjust the cutting position. At this time, the transfer of the workpiece through the workpiece transfer unit 120 may be made in a state that covers the anti-fouling cover 170 so that the cutting oil or the cutting chip does not move to a large area inside the hot cell.

On the other hand, in order to adjust the precise cutting position of the workpiece (W) can be used up and down adjustment unit 159 and / or workpiece rotation unit 130.

When the cutting position of the work W is adjusted, the rotary cutting mechanism 153 of the cutting part 150 is driven and the cutting feed part 160 is operated to gradually move the cutting part 150 toward the work W side. Cutting of (W) is performed, and in this process it is preferable to spray the cutting oil to the rotary cutting mechanism 153 through the cutting oil supply unit 180. In addition, the injected cutting oil falls to the scrap processing unit 190 together with the cutting chip (scrap), and the cutting oil passing through the separation hole 192 of the scrap collection tank 191 is recovered to the water tank 185 to pump 181. It is reused to supply coolant through).

Meanwhile, the driving of the various drive motors 121a, 131a, 151a, and 161a provided in the workpiece transfer part 120, the workpiece rotation part 130, the cutting part 150, and the cutting transfer part 160 may be performed using a control box (control unit) installed outside the hot cell. Is performed by adjusting In addition, the workpiece (W) is mounted on the workpiece bite jig unit 140, or the workpiece bite jig 140 is detached to the workpiece conveying unit 120, the opening and closing of the pollution prevention cover 170, scrap processing unit 190 Removal of scrap from the work is performed by remotely controlling the crane or robot installed inside the hot cell from the outside of the hot cell.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

100 ... Cutting device for spent fuel skeleton 110 ... Base frame
120 ... workpiece feed 121 ... workpiece feed
122 ... rotating shaft member 123 ... guide
124 ... rotating member 125 ... jig fixing member
125a ... fixing protrusion 125b ... fixing groove
130 ... workpiece rotation 131 ... workpiece rotation
140 ... workpiece bite jig part 141 ... jig body
141a ... through hole 142 ... contact adjustment member
145 ... mounting mechanism 145a ... rotating shaft member
145b ... handle 146 ... clamping means
148 ... Hanging hook 149 ... Sealing member
150 ... cutting part 151 ... cutting driving part
153 ... rotary cutter 154 ... clamping mechanism
157 ... Cutter cover 158 ... Transfer mounting member
159 ... up and down adjustment part 160 ... cutting feed part
161 ... Cutting feed drive unit 162 ... Rotary shaft member
163 ... Guide guide 170 ... Pollution-proof cover
171 ... retainer 173 ... hinge
175. Rotating part 176 ... Rotating body
177 ... through opening 178 ... handle
179 ... cover extension 180 ... coolant supply
181 Pump 185 Tank
190 ... scrap processing unit 191 ... scrap collector
192.Separator A ... support grid
B ... bearing C ... connector
P1 ... Measure P2 ... Guide
S ... elastic means W ... workpiece

Claims (12)

A workpiece bite jig unit to which at least one workpiece of the tube, support grid, and irradiation capsule provided in the spent fuel skeleton is mounted;
A workpiece transfer part which is detachably mounted to the workpiece bite jig part and is transported in left and right directions;
A cutting unit having a rotary cutting mechanism to cut a workpiece mounted to the workpiece biting jig unit;
A cutting feeder for moving the cutting part in the front-rear direction so that the workpiece is cut through the cutting part; And
And a base frame on which the workpiece transfer unit and the cutting transfer unit are installed.
Cutting of the workpiece by the cutting portion is carried out inside the hot cell, the drive of the workpiece transfer portion, the cutting portion and the cutting transfer portion is adjusted outside the hot cell, the cutting device for spent nuclear fuel skeleton. The method of claim 1,
A rotary cutting mechanism provided on the cutting portion, and a pollution prevention cover portion installed to cover a workpiece to be cut through the rotary cutting mechanism;
Cutting device for spent nuclear fuel skeleton, characterized in that it further comprises. The method of claim 2,
The anti-contamination cover part has a fixed part fixed to the base frame and a rotating part formed by a hinge opening coupled to one side of the fixed part and a through opening through which the workpiece penetrates. Cutting device. The method of claim 3,
And the pivot unit includes a handle for pivoting the pivot unit, and a cover extension part extending from the through opening to the workpiece transfer unit. The method of claim 1, wherein the workpiece transfer unit,
And a workpiece rotating part installed on the workpiece conveying part and conveyed to the left and right together with the workpiece conveying part and rotating the workpiece biting jig part mounted to the workpiece conveying part. The method according to any one of claims 1 to 5,
A cutting oil supply unit including a water tank accommodating the cutting oil supplied to the rotary cutting mechanism, and a pump for pressurizing the cutting oil accommodated in the water tank to the rotary cutting mechanism;
Cutting device for spent nuclear fuel skeleton, characterized in that it further comprises. The method according to claim 6,
A scrap processing unit installed at an upper portion of the water tank, the scrap processing unit having a scrap collection tank formed with a separation hole to separate scrap falling from the rotary cutting device from cutting oil;
Cutting device for spent nuclear fuel skeleton, characterized in that it further comprises. The method according to any one of claims 1 to 5,
The cutting transfer unit is a cutting device for spent nuclear fuel skeleton, characterized in that it comprises a vertical adjustment for transferring the cutting in the vertical direction. The method according to any one of claims 1 to 5,
The workpiece transfer part has a jig fixing member to which the jig body of the workpiece bite jig portion is mounted,
The jig fixing member is fastened and coupled to the jig body and the jig fixing member after the fixing protrusion protruding toward the workpiece biting jig part and the mounting mechanism provided in the jig body rotate to adjust the engagement position of the workpiece biting jig part. Cutting device for spent nuclear fuel skeleton, characterized in that it has a fixing groove formed so as to. 10. The method of claim 9,
The mounting mechanism is a cutting device for spent nuclear fuel skeleton, characterized in that the rotating shaft member connected to the jig main body is installed at one end and a handle for tightening the jig main body and the jig fixing member is installed at the other end. 10. The method of claim 9,
The workpiece bite jig portion cutting device for spent nuclear fuel skeleton, characterized in that it has a hook hook so that the removal work of the workpiece bite jig portion can be easily made by the robot. The method of claim 1,
The drive motor for driving the rotary cutting mechanism is a cutting device for spent nuclear fuel skeleton, characterized in that connected to the electrical wiring through a connector to facilitate replacement.

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