JPH11202085A - Treatment device of control rod drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate and shorten exchange work of control rod drive device in parallel to the treatment device already set on a rotary platform. SOLUTION: A rotary platform 29 is set in a pedestal 68 supporting a reactor pressure vessel 1 and below the reactor pressure vessel 1. On the rotary platform 29, a rail 72 in diameter direction is laid and a running dolly 30 is set on the rail 72 in diameter direction. On the running dolly 30, a rotary frame 31 correcting the posture of a control rod drive device 2 vertically and horizontally and controlling is placed. A vertical rail is placed on the rotary frame 31 and an elevating dolly 32 is placed along with the vertical rail. To the elevation dolly 32, a control rod drive device and an automatic position correction mechanism moving a bolt detaching machine 33 loaded on a bolt detaching machine dolly 34 are placed. The automatic position correction mechanism consists of X-axis and Y-axis slide mechanism capable of finely controlling in X-axis direction and Y-axis direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for handling an improved control rod drive (FMCRD) installed in an improved boiling water reactor (ABWR).

[0002]

2. Description of the Related Art Generally, in a boiling water reactor, a control rod 3 is inserted into and removed from a reactor core 4 by a control rod driving device 2 provided through the bottom of a reactor pressure vessel 1 as shown in FIG. The power of the reactor is controlled. That is, a number of control rod driving devices 2 are provided below the boiling water reactor pressure vessel 1, and control rods 3 connected to the top of the control rod driving device 2 are inserted into or pulled out of the core 4.

FIG. 10 shows a longitudinal section of this improved control rod driving device 2. A long housing 5 penetrates and is fixed to the lower end of the reactor pressure vessel 1 only partially shown in FIG.

The control rod driving device 2 is fixed to the housing 5 with mounting bolts 6. An outer tube 7 and a guide tube 8 are concentrically arranged inside the housing 5 and are sequentially fixed. I have. An electric motor 10 is attached to the lower end of the outer tube 7 via a spool piece 8a and a motor bracket 9.

The electric motor 10 drives the control rod 3 shown in FIG. 9 to be inserted and removed, and the rotation of the rotation starting shaft 11 is transmitted to a rotation transmission shaft 13 via a gear device 12. The upper end of the rotation transmission shaft 13 is connected to the drive screw 14 by a keyed groove.

[0006] A nut 15 is screwed into the drive screw 14. When the nut 15 is at the lowermost position, the coupling spat 19 at the upper end for connecting the control rod 3 is formed to a length just protruding into the reactor pressure vessel 1.

The hollow piston 18 is prevented from rotating by engaging a roller 16 mounted on the lower end with a groove 17 and further engaging a window (not shown) opened in the guide tube 8 to engage the hollow piston. A latch 20 is provided to prevent the 18 from dropping.

A lower flange 5 is provided in the housing 5.
a, water (purge water) is always filled by an inlet 21 provided in the order of a, the outer tube 7, its lower flange 7a, and the guide tube 8. This water flows into the reactor pressure vessel 1 through the gap between the hollow piston 18 and the labyrinth seal 22. The normal insertion and withdrawal of the control rod 3 by the control rod driving device 2 thus formed is performed as follows.

That is, by rotating the electric motor 10 forward and backward, the drive screw 14 is rotated forward and reverse, and the nut 15 is raised or lowered. Then, the hollow piston 18 placed on the nut 15 by its own weight moves up and down together, and the control rod 3 connected to the upper end of the hollow piston 18 via the coupling spat 19 is inserted into the core 4.・ It is pulled out.

On the other hand, when quick insertion of the control rod 3 is required, high-pressure water is supplied from the inlet 21 below the hollow piston 18 in the housing 5, and the hollow which only rests on the nut 15 by its own weight. The piston 18 separates from the nut 15 and is rapidly driven upward to rapidly insert the control rod 3 into the core 4. Thereafter, the lower end of the latch 20 engages the lower edge of the window (not shown) to prevent the hollow piston 18 from lowering.

In order to lower the hollow piston 18 again by the electric motor 10, the drive screw 14 is rotated in the insertion direction, and the nut 15 is brought into contact with the hollow piston 18 to latch.
20 back inside to disengage with the window, then drive screw 14
Is rotated in the pulling-out direction to lower the hollow piston 18.

At the end of the quick insertion of the control rod 3, it is necessary to decelerate the heated hollow piston 18 and the control rod 3. For this reason, a disc spring 23 is provided above the control rod drive device 2 as a buffer mechanism. The heated hollow piston 18 collides with the throttle 24 and the throttle 24 is a disc spring.
23 is depressed and decelerated.

Thereafter, the hollow piston 18 engages the lower edge of the window (not shown) of the latch 20 of the hollow piston 18 as described above.
To prevent the lowering of 18, the operation of the reactor requires monitoring that the hollow piston 18 and the control rod 3 are inserted into the core.

For this reason, as shown in FIG.
A stop pin 25 is provided in front of 24, and is configured to be slightly raised upward when the hollow piston 18 is at the latch position. In FIG. 10, reference numeral 26 denotes a base of the control rod guide tube, and the control rod guide tube is partially shown. 27 denotes an outer tube upper guide, and 28 denotes a coil spring.

The control rod driving device 2 configured as described above is disassembled at the time of periodic inspection, and is reassembled after the inspection. That is, as clarified in the exploded view of FIG. 11, the control rod driving device 2 is pulled out from the inside of the housing 5 connected to the bottom of the reactor pressure vessel 1, and disassembly, that is, removal is performed.

First, the motor 10 is removed from the motor bracket 9, and then the motor bracket 9 is removed from the spool piece 8a. Next, the spool piece 8a is removed from the control rod drive device 2, and finally, the control rod drive device 2 is removed from the housing 5. This control rod drive 2
Is removed or attached by the handling device shown in FIG.

FIG. 12 shows an example of a handling device of the control rod driving device 2. That is, in the pedestal 68 supporting the reactor pressure vessel 1, a rotating platform that rotates in the circumferential direction is provided below the reactor pressure vessel 1 and the control rod driving device 2.
29 is located in the pedestal 68.

A diametrical rail 72 is laid on the rotating platform 29, and a traveling carriage 30 capable of traveling in the diametrical direction of the rotating platform 29 is provided on the diametrical rail 72. The traveling carriage 30 includes a control rod drive 2
Rotating frame 31 that can lie sideways from vertical to horizontal
Is installed.

The rotating frame 31 has a lift truck 32 capable of moving the control rod driving device 2 and the bolt detacher 33 up and down in the vertical direction of the rotating frame 31, a bolt detacher truck 34 on which the bolt detacher 33 is mounted, and an attachment. An attachment trolley 35 on which 36a to 36d are mounted is provided.

For example, when the spool piece 8a is to be removed, the bolt detacher is moved from the bolt detacher truck 34 to the lift truck 32.
33, and then one of the attachments 36a to 36d of the spool piece 8a from the attachment carriage 35.
The pieces are mounted on the bolt detacher 33.

In FIG. 12, reference numeral 37 denotes a control rod driving device 2.
Shows a CRD transport vehicle capable of transporting
The transport vehicle 37 travels on a rail 71 for a CRD transport vehicle laid on a base plate 70 which is movable at a device loading / unloading port 69 provided on a pedestal 68. Reference numeral 73 denotes an internal pump attached to the lower part of the reactor pressure vessel 1.

FIG. 13 shows the control rod driving device 2 with a bolt detacher 33.
1 shows an example of a handling device that attaches and handles. To remove the spool piece 8a, the wrench attachment 38 attached to the bolt detacher 33 is lifted up to the spool piece 8a by the lifting carriage 32 shown in FIG. The above operations are all performed by an operator operating the control room by remote drive.

[0023]

In the above-mentioned conventional construction, when handling the control rod driving device 2 as shown in FIG. 13, for example, the wrench attachment 38 and the bolt detacher 33 are moved to the control rod driving device 2. Therefore, the operation must be performed using the rotating platform 29, the traveling trolley 30, and the lifting trolley 32 shown in FIG.

Therefore, a large number of handling devices are required, so that the work must be proceeded with caution, and a large moving distance is required, which requires a large amount of work time. In the periodic inspection of the control rod driving device 2,
Although dozens of bodies need to be replaced each year, see Figures 12 and 13
As shown in (1), in the conventional handling device, since the control rod drive device 2 can be replaced only one by one, there is also a problem that much time is required.

The present invention has been made to solve the above-mentioned problems, and the control rod driving device can be easily replaced in parallel with an existing handling device, and the replacement of the control rod driving device can be shortened. It is to provide a device.

[0026]

According to a first aspect of the present invention, there is provided a rotary platform installed in a pedestal supporting a reactor pressure vessel and below the reactor pressure vessel, and laid on the rotary platform. Diametrical rails,
A traveling vehicle that linearly travels on the diametrical rail, a rotating frame installed on the traveling vehicle, a vertical rail installed on the rotating frame, an elevating vehicle that moves up and down along the vertical rail, and an elevating vehicle And an automatic position correcting mechanism provided in the apparatus.

According to a second aspect of the present invention, the automatic position correcting mechanism comprises an X-axis slide mechanism and a Y-axis slide mechanism mounted on the lift truck, and the X-axis slide mechanism is a bogie main body of the lift truck. It is characterized by consisting of.

According to the first and second aspects of the present invention, a rotatable rotating platform is installed below the reactor pressure vessel, and a diametrical rail is laid on the rotating platform to make the traveling carriage travel straight. A rotating frame is attached to the traveling vehicle, a vertical rail is provided on the rotating frame, and the lifting vehicle travels on the vertical rail.

The control rod driving device mounted on the reactor pressure vessel or removed from the reactor pressure vessel is mounted on the bogie body of the lift truck. Since the lifting trolley is provided with an automatic position correcting mechanism comprising an X-axis slide mechanism and a Y-axis slide mechanism, the control rod drive device can be laid down from a vertical direction to a horizontal direction, or upside down. Further, fine adjustment can be performed in the X-axis direction and the Y-axis direction.

Therefore, in accordance with the present invention, in combination with the existing bolt detacher bogie, the control rod drive device transferred to the elevating bogie and the bolt detacher mounted on the bolt detacher bogie can be easily and accurately aligned. And the replacement of the control rod drive can be performed in a short time.

According to a third aspect of the present invention, a linear guide and an electric motor are provided for the X-axis direction slide mechanism and the Y-axis direction slide mechanism, respectively, so that the respective slide mechanisms can operate independently. It is characterized by the following.

According to the third aspect of the present invention, each of the X-axis direction slide mechanism and the Y-axis direction slide mechanism is provided with a linear guide and an electric motor, and can operate independently. Therefore, the fine-movement position adjustment in two directions can be performed quickly, so that the handling of the control rod driving device becomes easy.

According to a fourth aspect of the present invention, there is provided a movable carriage capable of arbitrarily traveling on the rotary platform, and the movable carriage is provided with an elevating mechanism incorporating an extension transformer and its driving device. .

According to the fourth aspect of the present invention, there is provided a movable trolley capable of traveling to an arbitrary position on a rotating platform provided at the lower part of the reactor pressure vessel, and comprises an extension transformer and a driving device therefor. Elevating mechanism is installed. Therefore, the control rod driving device can be easily handled and replaced in a short time in combination with the existing traveling trolley, bolt detacher trolley, and attachment trolley.

According to a fifth aspect of the present invention, the elevating mechanism comprises a plurality of extension transformers connected in series. According to the fifth aspect of the present invention, it is possible to easily move the bolt detacher and the control rod driving device in the vertical direction by the lifting / lowering mechanism including the plurality of extension transformers and the driving device connected in series.

According to a sixth aspect of the present invention, the elevating mechanism is configured such that the outer dimension becomes smaller as going upward. According to the sixth aspect of the present invention, the outer dimensions of the lifting / lowering mechanism including a plurality of extension transformers connected in series and their driving devices are configured to be smaller toward the top, so that control can be performed even between narrow control rod driving devices. The rod drive can be easily handled.

According to a seventh aspect of the present invention, a stage is provided on an upper stage of the elevating mechanism. According to the seventh aspect of the present invention, a stage capable of mounting a bolt detacher capable of attaching and detaching a bolt of a control rod driving device is provided on an upper stage of an elevating mechanism including a plurality of extension transformers connected in series and a driving device thereof. The bolt detacher can be easily mounted on the stage.

According to an eighth aspect of the present invention, a bolt detacher is mounted on the stage, and the bolt remover detaches a bolt for a spool piece, a motor bolt or a motor bracket bolt of a control rod driving device. It is characterized by consisting of.

According to the eighth aspect of the present invention, since the bolt detacher mounted on the stage is composed of three types by the structure of the control rod driving device, the work of replacing the attachment can be eliminated.

According to a ninth aspect of the present invention, an X-axis slide mechanism and a Y-axis slide mechanism are installed on the movable carriage, and the lifting device is installed on the X-axis slide mechanism or the Y-axis slide mechanism. It is characterized by becoming.

According to the ninth aspect of the present invention, the lifting device including the extension transformer and the driving mechanism is mounted on the slide mechanism movable in the X-axis direction and the Y-axis direction, thereby positioning the bolt detacher. Can be easily done.

According to a tenth aspect of the present invention, the X-axis direction slide mechanism and the Y-axis direction slide mechanism are provided with a linear guide and an electric motor, respectively, so that the respective slide mechanisms can operate independently. It is characterized by becoming.

According to the tenth aspect of the present invention, the slide mechanisms movable in the X-axis direction and the Y-axis direction are installed on the carriage, and the slide mechanisms for each axis can be operated independently.
Direction alignment can be performed accurately and reliably.

[0044] The invention of claim 11 is characterized in that a plurality of fixing mechanisms for fixing to the rotating platform are provided on a truck floor plate of the movable cart. According to the invention of claim 11, there are a plurality of mechanisms for fixing the bogie so that the bogie does not move after the positioning of the bolt detacher and the control rod driving device of the stage installed on the upper stage of the elevating device including the extension transformer and the driving mechanism. With this arrangement, it is possible to prevent the bogie from moving and shifting its position due to the rotational reaction force of the bolt detacher.

A twelfth aspect of the present invention is characterized in that the fixing mechanism comprises a hydraulic or pneumatic cylinder having a member having a high frictional force attached to a tip thereof. According to the invention of claim 12, the truck fixing mechanism can withstand a large force by attaching a member having a high frictional force to the tip of a hydraulic or pneumatic cylinder.

A thirteenth aspect of the present invention is characterized in that a monitoring device is provided on the stage. According to the thirteenth aspect, the state of the bolt detacher can be monitored by installing the monitoring device for monitoring the state of the bolt detacher mounted on the stage on the stage.

According to a fourteenth aspect of the present invention, there is provided a carriage for transferring the control rod driving device detached from the rotary platform from inside the pedestal to an inspection or repair room.

According to the fourteenth aspect of the present invention, the control rod drive device removed by the bolt remover of the stage installed on the upper stage of the elevating device including the extension transformer and the drive mechanism is taken out from the detacher, and a plurality of control rod drive units are provided to the inspection / repair room. The provision of the transport carriage for transferring the control rods together allows a large number of control rod driving devices to be transported at one time.

[0049]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a control rod driving device handling device according to the present invention will be described with reference to FIGS. FIG. 1 is a view for explaining a handling device of a control rod driving device according to the present embodiment. The same parts as those in FIG. 12 are denoted by the same reference numerals, and FIG. 2 is a rotary frame 31 and a lift truck 34 in FIG. FIG. 3 also shows an enlarged view of the positional relationship between the movable trolley 39 and the elevating mechanism 41.

In FIG. 1, only the main part of the reactor pressure vessel 1 and the pedestal 68 supporting the reactor pressure vessel 1 are partially shown in a longitudinal section. That is, a rotatable rotary platform 29 is installed in the pedestal 68 below the control rod driving device 2 and the internal pump 73 provided at the bottom of the reactor pressure vessel 1. This rotating platform 29
A diametrical rail 72 is laid on top.

On this diametrical rail 72, a traveling carriage 30 that travels straight is mounted. The traveling carriage 30 is provided with a rotating frame 31. This rotating frame 31 is provided with a vertical rail 31a as shown enlarged in FIG.
An elevating trolley 32 that moves up and down along the vertical rail 31a is installed. The lift truck 32 is provided with an automatic position correction mechanism described later.

The diametrical rail 72 has a bolt detacher.
Bolt detacher bogie 34 equipped with 33 and attachment 36
Attachment cart 35 equipped with a to 36d is mounted and travels. The base plate 70 is installed through the equipment loading / unloading port 69 of the pedestal 68, and the CR is placed on the base plate 70.
A rail 71 for the D transport vehicle is laid, and the CRD transport vehicle 37 runs on the rail 71 for the CRD transport vehicle. The CRD carrier rail 71 and the diametrical rail 72 are detachably connected.

Further, the rotating platform 29 can be freely moved to any position on the rotating platform 29 as shown in FIG.
And a CR shown in FIGS. 7 and 8.
The transport truck 43 that transports the D storage tube 66 is mounted.

Next, the configuration of the automatic position correcting mechanism provided on the lift truck 32 will be described with reference to FIG.

That is, the X-axis direction slide mechanism 44, which can be moved in the X-axis direction, is composed of a bogie main body 32a formed of a cylindrical body having a U-shaped cross section with one side open, and holds the bogie main body 32a from behind. And a pair of upper and lower Y-axis direction slide mechanisms 45a and 45b which can be moved in the Y-axis direction.

The X-axis direction slide mechanism 44 includes a pair of upper and lower X-axis direction linear guides 46a and 46b and an X-axis direction electric motor.
47, which can be finely adjusted by driving them. On the other hand, the Y-axis direction slide mechanisms 45a and 45b are composed of a pair of upper and lower Y-axis direction linear guides 48a and 48b and a Y-axis direction electric motor 49, and can be finely adjusted by driving them.

Further, a receiving table 50 is provided at the bottom of the bogie main body 32a.
1 and 10 or FIG.
The control rod driving device 2 similar to that shown in FIG. 11 is mounted, and the control rod driving device 2 can be tilted from the vertical direction to the horizontal direction and upside down from the vertical direction.
This can be done while making fine adjustments at 45b.

Thus, according to the present embodiment, the bolt detacher 34 equipped with the existing bolt detacher 33 and the attachment carriage 35 equipped with the attachments 36a to 36c are interlocked, and together with these, the rotating platform is used. Accuracy is improved by the alignment performed between the vehicle 29 and the traveling trolley 30, and the time for replacing the control rod drive device 2 can be reduced.

Next, referring to FIG. 3, a description will be given of the structure of the movable carriage 39 which freely travels on the rotating platform 29 and the lifting mechanism 41 mounted thereon. In FIG. 3, the moving carriage 39 comprises a vehicle body 39a, a frame 39b standing from the rear side of the vehicle body 39a, and a handle 39c attached to the frame 39b. An electric motor 53 for the Y-axis direction and wheels 57a are mounted on the vehicle body 39a.
57d (57c and 57d are not shown), hydraulic cylinder 58a
Fixed parts 59a to 59c having 58d (58d is not shown) and a hydraulic pump 60 are attached.

A control box 61 is attached to the rear surface of the frame 39b. The control box 61 has an electric motor, a hydraulic pump,
A slide mechanism to be described later, a control circuit of the drive device 41a, and the like are incorporated, and are remotely operated by a command signal from a central control operation room (not shown).

The X-axis direction linear guide 52 is mounted on the vehicle body 39a.
An X-axis direction slide mechanism 54 having a and 52b is mounted, and a Y-axis direction slide mechanism 51 including Y-axis direction linear guides 55a and 55b is mounted on the X-axis direction slide mechanism 54. ing. A Y-axis direction electric motor 56 is provided between the Y-axis direction slide mechanism 51 and the X-axis direction slide mechanism 54.

The lifting mechanism 41 is mounted on the Y-axis direction sliding mechanism 51.
Is installed. The lifting mechanism 41 is a three-stage extension transformer 40
And a drive device for driving the extension transformer 40 to expand and contract.
41a. The extension transformer 40 is configured to be vertically expandable and contractible, and its outer dimensions become smaller toward the upper stage. A stage 42 is mounted on the uppermost extension transformer 40, and a monitoring device 62 is mounted on the stage 42.

The handling device shown in FIG. 3, comprising the movable carriage 39, the X-axis direction slide mechanism 54, the Y-axis direction slide mechanism 51, the lifting / lowering mechanism 41, and the stage 42, is intended to be moved to the rotary platform 29 for exchange. When the vehicle arrives at the lower part of the control rod driving device 2, the hydraulic pump 60 is driven to fix the movable carriage 39, and the hydraulic cylinders 58a, 58b, 58c are operated, respectively, to the platform 29 by the fixing portions 59a, 59b, 59c. Fix it.

Next, the elevating mechanism 41 is driven to drive the extension transformer.
40 is lowered to the lower limit, and the stage 42 is equipped with a bolt detacher (not shown). Thereafter, the extension transformer 40 is moved up to a position immediately below the control rod driving device 2, and if the position is shifted, the respective linear guides 52a, 52b, 55a, 55b
And the electric motors 53 and 56 adjust the slide mechanisms 51 and 54 to perform positioning.

The position is confirmed by the monitoring device 62 installed on the stage 42. After the positioning is completed, the bolt detacher 33 is moved up to the control rod driving device 2 by the extension transformer 40 and closely attached, and then the wrench is operated to remove the bolt.

Next, after the removal of the bolt is completed, the extension transformer 40 is lowered to remove the control rod driving device 2. Then, the fixing of the movable cart 39 is released, the movable cart 39 is moved to the position of the crane (not shown), the control rod driving device 2 is removed from the bolt detacher 33, and the movable cart 39 is moved to the next replacement place.

FIG. 4 shows a case where the spool piece 8a of the control rod driving device 2 shown in FIGS.
42 shows an example in which a bolt detacher 63 dedicated to the spool piece 8a is mounted on 42.

FIG. 5 shows a case where the motor 10 of the control rod driving device 2 shown in FIGS. 10 and 11 is handled.
An example is shown in which a dedicated bolt detacher 64 for 10 is mounted. FIG. 6 shows an example in which the motor bracket 9 of the control rod driving device 2 in FIGS. 10 and 11 is handled, and shows an example in which a bolt detacher 65 dedicated to the motor bracket 9 is mounted on the stage 42.

FIG. 7 and FIG.
This shows an example in which a plurality of RD storage tubes 66 are mounted, and CRD
Control rod drive 2 removed by the handling device in storage tube 66
The components such as the spool piece 8a and the electric motor 10 can be stored and transported from the platform 29 to a repair room (not shown). The CRD storage tube 66 has a structure that can be replaced depending on the shape of the control rod driving device 2 to be mounted. Therefore, you can carry many parts at once,
The replacement work of the control rod drive device 2 can be performed in a short time.

[0070]

According to the present invention, the control rod driving device can be replaced with an existing handling device such as a bogie, so that the accuracy can be improved and the control rod driving device can be periodically inspected. And the work time for replacement work and the like can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of a control rod driving device handling device according to the present invention.

FIG. 2 is an enlarged perspective view showing a rotating frame and a lift truck in FIG. 1;

FIG. 3 is an enlarged perspective view showing a movable trolley and an elevating mechanism in FIG. 1;

FIG. 4 is a perspective view showing a state in which a bolt detacher for a spool piece is mounted on the stage of the extension transformer in FIG. 3;

FIG. 5 is a perspective view showing a state in which a motor bolt detacher is mounted on the stage of the extension transformer in FIG. 3;

FIG. 6 is a perspective view showing a state in which a motor bracket bolt detacher is mounted on the stage of the extension transformer in FIG. 3;

FIG. 7 is a plan view showing a state in which the CRD storage tube is placed on the CRD transport vehicle in FIG.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a side view showing a partial longitudinal sectional view in which a lower part of the reactor pressure vessel is partially cut away.

FIG. 10 is a longitudinal sectional view showing the control rod driving device in FIG. 9;

FIG. 11 is an exploded view for explaining a procedure for removing the control rod driving device in FIG. 10;

FIG. 12 is a configuration diagram for explaining a conventional control rod driving device handling device.

FIG. 13 is a side view showing a state in which a bolt detacher is attached to the control rod driving device and handled in FIG. 12;

[Explanation of symbols]

1. Reactor pressure vessel, 2. Control rod drive (CRD),
3 ... Control rod, 4 ... Core, 5 ... Housing, 5a ... Lower flange, 6 ... Mounting bolt, 7 ... Outer tube, 7
a: lower flange, 8: guide tube, 8a: spool piece, 9: motor bracket, 10: electric motor, 11: rotation start shaft, 12: gear device, 13: rotation transmission shaft, 14: drive screw, 15: nut, 16 ... roller, 17 ... groove, 18 ... hollow piston, 19 ... coupling spat, 20 ... latch, 21 ... inlet, 22 ... labyrinth seal, 23 ... disc spring, 24 ... throttle, 25 ... stop pin, 26 ... control Rod guide tube base, 27
… Outer tube upper guide, 28… Coil spring, 29…
Rotating platform, 30: traveling trolley, 31: rotating frame, 31a: vertical rail, 32: elevating trolley, 33: bolt detacher, 34: bolt detacher, 35: attachment trolley,
36a, 36b, 36c, 36d: Attachment, 37: CRD
Transporting trolley, 38 ... wrench attachment, 39 ... moving trolley,
39a: body, 39b: frame, 39c: handle, 40: extension transformer, 41: elevating mechanism, 41a: drive unit, 42: stage,
43… CRD carrier, 44… X axis direction slide mechanism, 45
a, 45b: Y-axis direction sliding mechanism, 46a, 46b: X-axis direction linear guide, 47: X-axis direction electric motor, 48a,
48b: Linear guide for Y axis direction, 49: Electric motor for Y axis direction, 50: Cradle, 51: Slide mechanism for Y axis direction, 52a,
52b: X-axis direction linear guide, 53: X-axis direction electric motor, 54: X-axis direction slide mechanism, 55a, 55b: Y-axis direction linear guide, 56: Y-axis direction electric motor, 57a,
57b: wheels, 58a, 58b, 58c: hydraulic cylinders, 59a,
59b, 59c: fixed part, 60: hydraulic pump, 61: control box, 62
... Monitoring device, 63 ... Bolt detacher for spool piece, 64 ...
Motor bolt detacher, 65… Motor bracket bolt remover, 66… CRD storage tube, 67… Wheels, 68… Pedestal, 69… Equipment loading / unloading, 70… Base plate, 71… CRD carrier trolley, 72… Diameter rail, 73 ... internal pump.

Claims (14)

[Claims] 1. A rotating platform installed in a pedestal supporting a reactor pressure vessel and below the reactor pressure vessel, a diametric rail laid on the rotating platform, and A traveling vehicle that travels straight, a rotating frame installed on the traveling vehicle, a vertical rail installed on the rotating frame, an elevating vehicle that moves up and down along the vertical rail, and an automatic position provided on the elevating vehicle A handling device for a control rod driving device, comprising a correction mechanism. 2. The automatic position correcting mechanism comprises an X-axis direction slide mechanism and a Y-axis direction slide mechanism installed on the lift truck, and the X-axis direction slide mechanism comprises a truck body of the lift truck. The handling device for a control rod drive device according to claim 1. 3. The X-axis direction slide mechanism and the Y-axis direction slide mechanism are each provided with a linear guide and an electric motor so that the respective slide mechanisms can operate independently. A handling device for the control rod drive device according to claim 2. 4. The moving vehicle according to claim 1, further comprising: a moving vehicle capable of arbitrarily traveling on the rotating platform, wherein the moving vehicle is provided with an elevating mechanism incorporating an extension transformer and its driving device. Handling device for control rod drive. 5. The handling device for a control rod driving device according to claim 4, wherein said lifting mechanism comprises a plurality of extension transformers connected in series. 6. The handling device for a control rod driving device according to claim 4, wherein said lifting mechanism is configured such that an outer dimension becomes smaller toward an upper stage. 7. The handling device for a control rod driving device according to claim 4, wherein a stage is installed in an upper stage of the lifting mechanism. 8. A bolt detacher is mounted on the stage, and the bolt detacher comprises a bolt detacher for detaching a spool piece bolt, a motor bolt or a motor bracket bolt of a control rod driving device. The handling device for a control rod driving device according to claim 7, wherein 9. An X-axis direction slide mechanism and a Y-axis direction slide mechanism are installed on the movable carriage, and the lifting device is installed on the X-axis direction slide mechanism or the Y-axis direction slide mechanism. 5. The handling device for a control rod driving device according to claim 4, wherein: 10. The X-axis direction slide mechanism and the Y-axis direction slide mechanism are provided with a linear guide and an electric motor, respectively, so that the respective slide mechanisms can operate independently. The handling device for a control rod drive device according to claim 9. 11. The handling device for a control rod drive device according to claim 4, wherein a plurality of fixing mechanisms for fixing the rotating platform to the rotating platform are provided on a bogie floor plate of the movable bogie. 12. The control rod driving device according to claim 11, wherein the fixing mechanism is formed by attaching a member having a high frictional force to a tip of a hydraulic or pneumatic cylinder. 13. The control rod driving device handling device according to claim 7, wherein a monitoring device is provided on the stage. 14. The rotating platform is provided with a carriage for transferring a control rod drive device removed from the reactor pressure vessel from inside the pedestal to an inspection or repair room. 8. A handling device for the control rod drive device according to 7.