JPH1073692A - Furnace structure handling equipment - Google Patents

Abstract

(57) [Problem] To remove a control rod, a fuel support bracket, and a control rod guide tube, shorten a mounting operation time, attach a device for safe storage, remove a shroud, or inspect, repair, and replace the shroud. Shorten the work period. A control rod gripper for gripping a control rod disposed in a shroud, a fuel support bracket and a control rod guide pipe gripper for gripping a fuel support bracket and a control rod guide pipe disposed in the shroud are provided. And a lifting device 21, 23 for raising and lowering the grip device 31 from the upper lattice plate 9 to the core support plate 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing and storing a reactor internal structure safely and in a short time, for example, for cleaning, inspecting, repairing and replacing a shroud installed in a reactor pressure vessel. After that, the present invention relates to a furnace internal structure handling device for performing reattachment.

[0002]

2. Description of the Related Art Generally, in a boiling water reactor, a core support plate 3 is provided on a shroud 2 integral with a reactor pressure vessel 1 containing cooling water, as shown in FIG. A control rod driving device 4 is attached to the bottom of the reactor pressure vessel 1 located below, and a control rod guide tube 5 is provided above the control rod driving device 4 so as to protrude above the core support plate 3. A control rod 6 having a cruciform cross section is fitted into the opening of the guide tube 5 so as to be connected to the upper part of the control rod driving device 4.

Further, a fuel support member 7 is mounted on the opening of the control rod guide tube 5, and the lower portions 8 a of four fuel assemblies 8 are mounted on the fuel support member 7 while being integrated with the shroud 2. The upper grid plate 9 forming the upper part 8 of each fuel assembly 8
b and the upper part of the control rod 6 are fitted respectively.

At the time of the periodic inspection, after the fuel assembly 8 is removed, the control rod 6 and the fuel support 7 are mounted, for example, on Japanese Utility Model Publication No. 60-39834 (U.S. Pat. No. 1,647,457).
No.) As described in the publication, the control rod and the fuel support bracket gripping device are used for replacement. The control rod guide tube 5 is replaced using a control rod guide tube gripping device (not shown).

[0005] As described above, the conventional control rod 6, the fuel support 7 and the control rod guide tube 5 use different types of gripping devices, and in a periodic inspection, only a few bodies are replaced. I have.

[0006]

By the way, unlike the conventional periodic inspection, the shroud 2 which is carried out about every 60 days is used.
In the cleaning, inspection, repair and replacement work of the nuclear power plant, the nuclear power plant is shut down for a long time, all the control rods 6, the fuel support fittings 7 and the control rod guide tubes 5 inside the shroud 2 are removed, and a new one is removed. After replacing the shroud 2, re-installation must be performed.

In removing and installing the control rod 6, the fuel support fitting 7 and the control rod guide tube 5, the control rod 6, the fuel rod 7 and the control rod guide tube 5 are removed from the shroud 2 having a water depth of about 20 meters by an auxiliary hoist of the refueling machine and a dedicated gripping tool. The control rod 6, the fuel support fitting 7, and the control rod guide tube 5 are moved up and down above the reactor pressure vessel 1, moved to a fuel storage pool, and raised and lowered to a control rod storage rack at a depth of 12 meters. The travel distance is very long.

Further, the number of the control rods 6 and the fuel support fittings 7 to be removed and attached is several to about 140 at the time of the periodic inspection. As a result, it takes a lot of time to remove and attach. Removing and installing the control rod 6, the fuel support 7 and the control rod guide tube 5 is a critical path for cleaning, inspection, repair and replacement of the shroud 2. And conventionally, about 140 control rods 6,
No provision is made for temporarily and safely storing the fuel support 7 and the control rod guide tube 5.

The present invention has been made in view of the above-mentioned circumstances, and reduces the time required for removing and installing a control rod, a fuel support bracket, and a control rod guide tube, as well as installing a device for safely storing the shroud. An object of the present invention is to provide a furnace internal structure handling apparatus in which the period of cleaning, inspection, repair and replacement work is reduced.

[0010]

In order to solve the above-mentioned problems, a first aspect of the present invention provides a core support plate for supporting a fuel assembly in a reactor pressure vessel below, and a fuel assembly comprising: A control rod gripper for gripping a control rod disposed in a shroud, wherein the control rod gripper includes a shroud, and a control rod gripper, the shroud comprising: A gripping device having a fuel support fitting and a control rod guide pipe gripping tool for gripping a fuel support fitting and a control rod guide pipe disposed therein, and an elevating device for lifting and lowering the gripping device from the upper lattice plate to the core support plate. It is characterized by having.

According to a second aspect of the present invention, in the apparatus for handling a furnace internal structure according to the first aspect, the fuel support bracket and the control rod guide tube gripper are provided with a link mechanism on the output shaft of the cylinder, and the pin of the link mechanism is connected to the fuel pin. It is characterized in that the support bracket and the control rod guide tube can be simultaneously engaged and disengaged.

According to a third aspect of the present invention, in the furnace internal structure handling apparatus according to the first aspect, the lifting device includes at least a multi-stage telescopic mast and a wire rope winding device for expanding and contracting the multi-stage telescopic mast. It is characterized by.

According to a fourth aspect of the present invention, in the furnace internal structure handling apparatus according to the first aspect, the gripping device is driven by one of a hydraulic type and a pneumatic type.

According to a fifth aspect of the present invention, there is provided the furnace internal structure handling apparatus according to the first aspect, further comprising an automatic positioning device for performing positioning with the furnace internal structure.

According to a sixth aspect of the present invention, in the apparatus for handling a furnace internal structure according to the first, third or fifth aspect, the automatic positioning device rotates a rotation detector for detecting a rotation amount of the multi-stage telescopic mast and a gripping device. And a propulsion device.

According to a seventh aspect of the present invention, there is provided the furnace internal structure handling apparatus according to the first aspect, further comprising a guide base capable of moving the handling apparatus main body from the operation floor to the upper lattice plate in the shroud.

According to an eighth aspect of the present invention, in the furnace internal structure handling apparatus according to the seventh aspect, the guide base can be mounted by increasing the number of handling apparatus bodies to be used from one to a plurality. .

According to a ninth aspect of the present invention, in the reactor internal structure handling apparatus according to the first aspect, a storage device for managing and storing the internal structure removed from the shroud is provided in one of a dryer separator pit and a fuel storage pool. It is characterized by being provided in.

According to a tenth aspect of the present invention, in the reactor internal structure handling apparatus according to the ninth aspect, the storage device is formed to have the same shape by simulating the core support plate and the control rod drive device housing. .

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a reactor internal structure handling apparatus according to the present invention, in which the reactor internal structure handling device is moving inside the reactor and storing the reactor internal structure. FIG. Parts that are the same as or correspond to the conventional configuration will be described using the same reference numerals as in FIG.

As shown in FIG. 1, a fuel exchanger 11 is installed on an operation floor 10, and a wire rope 13 is wound around an auxiliary hoist 12 as a moving means in the fuel exchanger 11. An upper portion of a furnace internal structure handling device 14 as a handling device main body is fixed to a distal end of 13. The furnace internal structure handling device 14 is suspended by the wire rope 13 to the upper lattice plate 9. Also, dryer separator pit 1
Inside the fuel storage pool 17, a fuel storage rack 18 is installed while a furnace internal structure storage rack 16 is installed in 5.

The in-furnace structure handling apparatus 14 has a guide base 20 connected from the auxiliary hoist 12 of the fuel exchanger 11 to the wire rope 13 as shown in FIGS.
The guide base 20 can simultaneously move the four furnace structure handling devices 14 from the operation floor 10 to the upper lattice plate 9 in the shroud 2.

On the guide base 20, a cover 22 for the multi-stage telescopic mast 21, a wire rope winding device 23 for expanding and contracting the multi-stage telescopic mast 21, an air hose winding device 24, and a wire rope winding device 23 are provided. A drive motor 26 for rotating and driving the wire rope drum 25 and the air hose winding device 24, and a pulley 29 for winding the wire rope 27 and the air hose 28 of the wire rope winding device 23 and the air hose winding device 24.
And a rotation detector 30 for detecting the amount of rotation of the multi-stage telescopic mast 21. And the multi-stage telescopic mast 21
And a wire rope winding device 23 for expanding and contracting the multi-stage telescopic mast 21 to constitute a lifting device for raising and lowering a gripping device 31 to be described later from the upper lattice plate 9 to the core support plate 3.

The multi-stage telescopic mast 21 is formed in a multi-stage cylindrical shape as shown in FIG. 3 and can be operated independently, and the lowering operation is configured to extend sequentially from the outside. I have.

The lower end of the multi-stage telescopic mast 21 has a gripping device 3
1 is fixed, the gripping device 31 is formed in a substantially box shape,
The propulsion unit 32 is attached to the upper surface, and a pair of locking claws 33 is attached to the lower end. And grab device 3
As shown in FIG. 5, a guide cylinder 34 is provided inside 1, and a control rod grip 35 is disposed in the guide cylinder 34.

The control rod grip 35 is a guide cylinder 34
An air cylinder 37 is attached to a support shaft 36 fixed to the air hose 2.
It is driven by air supplied from 8. An output shaft 37a of the air cylinder 37 is connected to an end of a hook member 38 formed in a hook shape by a pin 39. The hook member 38 is rotatably attached to the inner surface of the guide cylinder 34 via a pin shaft 40, and the rotation range is restricted by a guide pin 41 fixed to the inner surface of the guide cylinder 34. ing.

A fuel support bracket and a control rod guide tube gripper 42 are disposed inside the gripper 31. The gripper 42 has an air cylinder 43. Frame 4 fixed inside
4 and the output shaft 43a of the air cylinder 43.
Is connected to a shaft 46 connected by a pin shaft 45, and a pin 49 is connected to the distal end thereof via a pin shaft 47 and a pin shaft 48. These pin shafts 45, 46, 47, 48, and 49 constitute a link mechanism.

Further, inside the gripping device 31, a seating detection mechanism 50 is provided, and a guide pin 51 is provided to protrude above the core support plate 3. When the grasping device 31 is seated on the core support plate 3, the seating detection mechanism 50 is pressed by the guide pin 51, and a limit switch (not shown) in the seating detection mechanism 50 is operated to confirm seating.

On the other hand, the amount of rotation of the multi-stage telescopic mast 21 is detected by the rotation detector 30. That is, as shown in FIG. The rotation amount is detected by engaging a gear 55 attached to the tip of the rotation detecting section 54 with a gear 55 attached to the gear 21. The detected rotation amount is converted into an electric signal, and the propulsion unit 32 is operated from a control panel (not shown) to correct the rotation position. Therefore, the automatic positioning device that performs positioning with the furnace internals,
Rotation detector 30 for detecting the amount of rotation of multi-stage telescopic mast 21
And a propulsion device 32 for rotating the gripping device 31.

Further, the furnace internal structure storage rack 16 is provided in FIG.
As shown in (1), the control rod 6, the fuel support fitting 7, and the control rod guide tube 5 removed by the furnace internal structure handling device 14 can be integrally stored. That is, the in-furnace structure storage rack 16 is formed in a rectangular frame shape, a support plate 60 of the same shape simulating the core support plate 3 is installed on the upper part, and guide pins 61 are implanted on the support plate 60. This support plate 60 is supported by a frame 62. Further, a plurality of cylindrical bodies 63 having the same shape simulating a control rod driving device housing are provided below the furnace internal structure storage rack 16.

Therefore, the fuel support 7 removed and moved by the furnace internal structure handling device 14 is mounted on the support plate 60, and the control rod guide tube 5 is mounted on the cylindrical body 63, so that it is equivalent to the shroud 2. It becomes possible to keep in the state of.

Next, the operation of the present embodiment will be described.

As shown in FIG. 1, the furnace internal structure handling device 14 is suspended by the wire rope 13 to the upper lattice plate 9 and supported by the auxiliary hoist 12 of the fuel exchanger 11. Then, for example, the furnace internal structure handling device 14
When the control rod 6, the fuel support 7 and the control rod guide tube 5 are to be removed, the drive motor 26 of the wire rope winding device 23 is driven to drive the wire rope drum 25 as shown in FIGS. Then, the multistage telescopic mast 21 is extended via the wire rope 27 and the gripping device 31 is lowered to the vicinity of the core support plate 3.

Here, by driving the drive motor 26, the air hose winding device 24 is also rotated, and the air hose 28 is sent out.

Next, as shown in FIG. 5, the gripping device 31 which has been lowered is seated on the fuel support 7 by the locking claw 33. This seating is confirmed by a guide pin 51 mounted on the core support plate 3 and a limit switch (not shown) of a seating detection mechanism 50 provided inside the gripping device 31. After confirming the seating, first, the air cylinder 37 is operated using the control rod grip 35, and the output shaft 34
The tip of the hook member 38 attached to the pin a with the pin 39 is hooked on the grip portion of the control rod 6.

At the same time, the fuel cylinder 7 and the control rod guide tube 5 operate the air cylinder 43 using the fuel support bracket and the control rod guide tube gripper 42, and the output shaft 4 thereof.
A pin 49 attached to the distal ends of the pin shafts 47 and 48 via a shaft 46 attached to the pin 3a with a pin shaft 45 is engaged with the fuel support 7 and the opening of the control rod guide tube 5.

Here, when the gripping device 31 rotates due to rotation of the multi-stage telescopic mast 21 and the position thereof with respect to the fuel rod guide tube 5 and the fuel support 7 is shifted, the gripping device 3
The position of the propulsion device 32 is corrected by driving the propulsion device 32 attached to the upper portion of the device 1.

The rotation position of the gripping device 31 is detected by the rotation detector 30 as shown in FIG. 6, the detected rotation amount is converted into an electric signal, and the propulsion device 32 is operated from a control panel (not shown). And correct the position.

Further, the control rod 6 gripped by the control rod grip 35 and the fuel support 7 and the control rod guide tube 5 engaged by the fuel support and the control rod guide pipe grip 42 are wound with a wire rope. Driving motor 26
Is driven to rotate the wire rope drum 25, the multi-stage telescopic mast 21 is contracted via the wire rope 27, and the gripping device 31 is raised to the vicinity of the upper lattice plate 9.

Next, as shown in FIG.
Is lifted by a wire rope 13 using the auxiliary hoist 12 of the above, and stored in a furnace structure storage rack 16 installed in a dryer separator pit 15.

As described above, according to the present embodiment, a gripping device having the control rod gripping tool 35 for gripping the control rod, the fuel support metal fitting 7, the fuel support fitting for gripping the control rod guide tube 5, and the control rod guide pipe gripping tool 42 is provided. 31 and a multi-stage telescopic mast 21, a wire rope winding device 21 and an air hose winding device 24 as a lifting device for raising and lowering the gripping device 31 from the upper lattice plate 9 to the core support plate 3. The control rod grip 35, the fuel support bracket, and the control rod guide tube gripper 42 are moved up and down by the telescopic mast 21, so that the control rod 6, the fuel support bracket 7, and the control rod guide tube 5 can be removed and attached.

The fuel support bracket and control rod guide tube gripper 42 are provided with a link mechanism on the output shaft 43a of the air cylinder 43, and the pin 49 of the link mechanism is simultaneously connected to the fuel support bracket 7 and the control rod guide tube 5. By being configured to be able to be disengaged, two structures can be handled simultaneously by one gripping mechanism.

Further, the elevating device includes a multi-stage telescopic mast 21.
And a wire rope winding device 23 for expanding and contracting the multi-stage telescopic mast 21, thereby preventing interference between the furnace internal structure and a wire rope or an air hose suspended from the fuel exchanger 11, The number used can be reduced.

The control rod gripper 35 for gripping the control rod in the gripper 31, the fuel support bracket for gripping the fuel support 7 and the control rod guide tube 5, and the control rod guide tube gripper 42 are composed of an air cylinder 37 and an air cylinder 43. As described above, since the driving is performed by the pneumatic driving means, the reliability can be improved. If the gripping device 31 has a waterproof structure, the life can be extended. Although the driving means is of a pneumatic type, it may be of a hydraulic type.

Further, an automatic positioning device for aligning the furnace internal structure handling device 14 and the furnace internal structure is provided, and the automatic positioning device includes a rotation detector 30 for detecting the rotation amount of the multi-stage telescopic mast 21. And the propulsion device 32 that rotates the gripping device 31, the number of operators who perform the alignment work can be reduced.

Further, the furnace internal structure handling device 14 is moved from the operation floor 10 to the upper grid plate 9 in the shroud 2.
By providing the guide base 20 as a moving means for moving the furnace internal structure, the furnace internal structure handling device 14 can be easily attached to and detached from the upper lattice plate 9. Further, by exchanging the guide base 20, it is possible to simultaneously move one to several furnace internal structure handling devices 14 from one.

By providing a furnace structure storage rack 16 for storing and managing the furnace structure taken out of the shroud 2 in the dryer separator pit 15 (or in the fuel storage pool 17), the furnace structure is provided. Can be stored and managed in a state in which it is taken out of the shroud 2 until re-installation. Also, the furnace internal structure storage rack 1
6 is formed in the same shape by simulating the core support plate 3 and the control rod drive device housing, so that the control rods 6, the fuel support fittings 7, and the control rod guide tubes 5 are stored in an assembled state, and the storage space is reduced. be able to.

The present invention is not limited to the above embodiment, but can be variously modified. For example, as shown in FIG.
Although the furnace internal structure handling apparatus 14 is configured to be movable at the same time, the guide base 20a shown in FIG.
The in-furnace structure handling device 14 can be moved at the same time, and the guide base 20b shown in FIG. 9 can move the one in-furnace structure handling device 14. Then, as shown in FIG. 9, when moving the single in-furnace structure handling apparatus 14, by attaching the weight 65, the right and left balance with respect to the wire rope 13 can be maintained at the same level. .

[0050]

As described above, according to the first aspect of the present invention,
According to the present invention, there is provided a gripping device having a control rod gripper for gripping a control rod disposed in a shroud, a fuel support bracket and a control rod guide tube gripper for gripping a fuel support bracket and a control rod guide tube disposed in the shroud, and By providing a lifting device for raising and lowering this gripping device from the upper lattice plate to the core support plate, the control rod, the fuel support bracket, and the control rod guide tube can be removed and attached with a single handling device. . As a result, it is possible to greatly reduce the period for removing and installing the furnace internals.

In addition, a space for the shroud cleaning or inspection, repair and replacement work can be effectively used, and the shroud cleaning or inspection, repair and replacement work period can be shortened, thereby contributing to an improvement in plant operation rate. can do.

According to a second aspect of the present invention, in the furnace internal structure handling apparatus according to the first aspect, the fuel support bracket and the control rod guide tube gripper are provided with a link mechanism on an output shaft of the cylinder, and a pin of the link mechanism is provided. Can be simultaneously disengaged from the fuel support and the control rod guide tube, so that one structure can handle two structures at the same time.

According to a third aspect of the present invention, in the furnace structure handling apparatus according to the first aspect, the lifting device includes at least a multi-stage telescopic mast and a wire rope winding device for expanding and contracting the multi-stage telescopic mast. This can prevent interference between the furnace internals and the wire ropes or air hoses suspended from the refueling machine, and reduce the number of used hoses.

According to the fourth aspect of the present invention, in the furnace internal structure handling apparatus according to the first aspect, the gripping device is driven by one of a hydraulic type and a pneumatic type to increase reliability. Can be.

According to the fifth aspect of the present invention, in the furnace internal structure handling apparatus according to the first aspect, an automatic alignment device for performing positioning with the internal structure of the furnace is provided, so that the number of operators performing alignment work is reduced. can do.

According to claim 6, claim 1, 3 or 5
In the furnace internals handling device described, the automatic positioning device, a rotation detector that detects the rotation amount of the multi-stage telescopic mast,
By providing the propulsion device for rotating the gripping device, the same effect as in claim 5 can be obtained.

According to a seventh aspect of the present invention, in the furnace structure handling apparatus according to the first aspect, the handling apparatus main body is provided with a guide base movable from the operation floor to the upper lattice plate in the shroud. The main body can be easily attached to and detached from the upper lattice plate.

According to an eighth aspect of the present invention, in the furnace internal structure handling apparatus according to the seventh aspect, the guide base can be mounted by increasing the number of handling apparatus bodies to be used from one to a plurality. One to several handling device bodies can be moved simultaneously.

According to a ninth aspect of the present invention, in the furnace internal structure handling apparatus according to the first aspect, a storage device for managing and storing the internal structure removed from the shroud is provided in any of the dryer separator pit and the fuel storage pool. By providing the crab, the storage and management can be performed while being removed from the shroud until the furnace internals are reinstalled.

According to the tenth aspect, in the furnace internal structure handling apparatus according to the ninth aspect, the storage device is formed by simulating the core support plate and the control rod driving device housing to have the same shape. The storage state can be reduced by assembling the rods, fuel support fittings, and control rod guide tubes in a storage state.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a furnace internal structure handling apparatus according to the present invention.

FIG. 2 is a perspective view showing a state in which the reactor internal structure handling apparatus of FIG. 1 is installed in a nuclear reactor and handles reactor internal structures.

3 is a partial cross-sectional front view showing the furnace internal structure handling apparatus of FIG. 2;

FIG. 4 is a schematic plan view showing a four-body mounting guide base in the furnace internal structure handling apparatus of FIG. 2;

FIG. 5 is a longitudinal sectional view showing a gripping device in the furnace internal structure handling device of FIG. 2;

FIG. 6 is a longitudinal sectional view showing a rotation detector in the furnace internal structure handling apparatus of FIG. 2;

FIG. 7 is a schematic perspective view showing a furnace internal structure storage rack of FIG. 1;

FIG. 8 is a schematic plan view showing a modified example of the guide base in the furnace internal structure handling apparatus.

FIG. 9 is a schematic plan view showing another modification of the guide base in the furnace internal structure handling device.

FIG. 10 is a sectional view showing a main part in a general reactor pressure vessel.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reactor pressure vessel 2 shroud 3 core support plate 4 control rod drive device 5 control rod guide tube 6 control rod 7 fuel support bracket 8 fuel assembly 9 upper lattice plate 10 operation floor 11 refueling machine 12 auxiliary hoist 13 wire rope 14 furnace Internal structure handling device (Handling device body) 15 Dryer separator pit 16 Furnace internal structure storage rack 17 Fuel storage pool 18 Fuel storage rack 20 Guide base 21 Multi-stage telescopic mast (elevating device) 22 Cover 23 Wire rope winding device (elevating / lowering) Device) 24 Air Hose Winding Device 25 Wire Rope Drum 26 Drive Motor 27 Wire Rope 28 Air Hose 29 Pulley 30 Rotation Detector 31 Gripping Device 32 Propulsion Device 33 Locking Claw 34 Guide Cylindrical Body 35 Control Rod Gripping Tool 42 Fuel Support Bracket And control rod guidance Jaws 50 seating detection mechanism 51 guide pin 54 rotation detector 60 supporting plate 61 the guide pin 62 frame 63 cylinder

Claims (10)

[Claims] 1. A reactor internal structure disposed in a shroud having a core support plate for supporting a fuel assembly in a reactor pressure vessel below and an upper grid plate for supporting the fuel assembly above. A control rod gripper for gripping a control rod disposed in the shroud, a fuel support bracket and a control rod guide for gripping a control rod guide tube disposed in the shroud. A furnace internal structure handling device, comprising: a gripping device having a guide tube gripper; and a lifting device for raising and lowering the gripping device from the upper lattice plate to the core support plate. 2. The reactor internal structure handling apparatus according to claim 1, wherein the fuel support bracket and the control rod guide tube gripper are provided with a link mechanism on an output shaft of the cylinder, and the pins of the link mechanism are connected to the fuel support bracket. An in-furnace structure handling apparatus characterized in that it can be simultaneously disengaged from a control rod guide tube. 3. The furnace internal structure handling device according to claim 1, wherein the lifting device includes at least a multi-stage telescopic mast, and a wire rope winding device for expanding and contracting the multi-stage telescopic mast. Furnace structure handling equipment. 4. The furnace internal structure handling apparatus according to claim 1, wherein the gripping device is driven by one of a hydraulic type and a pneumatic type driving means. 5. The furnace internal structure handling apparatus according to claim 1, further comprising an automatic positioning device for performing positioning with respect to the furnace internal structure. 6. The furnace internal structure handling device according to claim 1, wherein the automatic positioning device includes a rotation detector that detects a rotation amount of the multi-stage telescopic mast, and a propulsion device that rotates the gripping device. A furnace internal structure handling device comprising: 7. The furnace structure handling apparatus according to claim 1, further comprising a guide base capable of moving a handling apparatus main body from an operation floor to an upper lattice plate in a shroud. apparatus. 8. The in-furnace structure handling apparatus according to claim 7, wherein the guide base can be mounted by increasing the number of handling apparatus bodies to be used from one to a plurality. Object handling equipment. 9. The internal structure handling apparatus according to claim 1, wherein a storage device for managing and storing the internal structure removed from the shroud is provided in one of a dryer separator pit and a fuel storage pool. A furnace internal structure handling device characterized by the above-mentioned. 10. The in-furnace structure handling apparatus according to claim 9, wherein the storage device is formed in the same shape by simulating the core support plate and the control rod drive device housing. Object handling equipment.