JP2003066194A - Canister repacking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently conduct the repacking work of a canister from a cask to another cask. SOLUTION: A canister repacking apparatus 1 is for repacking a canister 3 containing radioactive material such as a nuclear fuel assembly, as an inner vessel of the cask 2 by withdrawing the canister 3 from the cask 2, and repacking in another cask 4. The device comprises a holding mechanism 6 holding the canister 3, elevation mechanism 7 elevating the holding mechanism 6, a protection cylinder 8 covering the canister 3 held by the holding mechanism 6 and protecting the canister 37 and a horizontal movement mechanism 9 horizontally moving the holding mechanism 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a canister refilling device for refilling a canister, which is an inner container of a cask for transporting or storing radioactive materials such as nuclear fuel assemblies, from one cask to another cask.

[0002]

2. Description of the Related Art Usually, radioactive materials such as spent nuclear fuel assemblies taken out at a nuclear power plant are stored in a metal transportation cask, transported to a cask storage building, and discharged until the next step, It is planned to be temporarily stored in this cask storage building.

The radioactive material such as the nuclear fuel assembly transported to the cask storage building may be stored in the cask storage building as it is by the transportation cask. However, the transportation cask must be designed so that even if it falls from the trailer during transportation, the contained nuclear fuel assembly etc. can be kept in a healthy state.
Robustly manufactured to meet the most stringent requirements for its integrity.

It is not rational to directly use such an expensive transportation cask for storage in a cask storage building. Rather, after transporting radioactive materials such as nuclear fuel assemblies to the cask storage building with a transportation cask, the radioactive materials stored in the transportation cask are
It is more rational to transfer from a transportation cask to a storage cask and store this storage cask in a cask storage building, while the transportation cask is used to transport another radioactive material.

Since the storage cask is made of, for example, concrete and is not used for transporting radioactive materials, it is not necessary to consider soundness at the time of dropping, and a strict strength design like a transport cask is required. No demands are imposed. Therefore, it can be manufactured at a lower cost than the transportation cask.

By the way, both the transportation cask and the storage cask are provided with an inner container called a canister for containing a radioactive substance therein. When refilling the radioactive material stored in the transportation cask into the storage cask, use an overhead crane provided in the cask storage building to remove this canister from the transportation cask with the radioactive material stored inside. It is considered that the canister is refilled by mounting the extracted canister to an empty storage cask that has not been mounted and has the canister mounted.

[0007]

However, such a canister refilling method has the following problems.

That is, the overhead crane provided in the cask storage building is for lifting the storage cask and moving it to a predetermined storage location.
It is not a dedicated device for lifting a canister. Therefore, when the canister is refilled, it becomes impossible to move the storage cask, which causes a problem in the movement of the storage cask.

Further, as described above, the overhead crane is
Since it is not a dedicated device for refilling canisters, when performing canister refilling work, different preparations are required when replacing the jig for lifting the canister or moving the storage cask. In addition, after the refilling work is completed, since it has to be returned to the jig for lifting the normal storage cask, it takes a lot of time from the start to the end of the work, which is not efficient. is there.

Further, the canister containing the radioactive substance is lifted up by an overhead crane without being shielded around the canister and moved to the place where the storage cask is arranged. There is the problem that it may lead to an increase in quantity.

The present invention has been made in view of such circumstances, and it is a canister capable of safely and efficiently refilling a canister from a refill source cask to a refill destination cask. An object is to provide a refill device.

[0012]

In order to achieve the above object, the present invention takes the following means.

That is, the invention of claim 1 is a canister refilling device for extracting a canister, which is an inner container of a cask and which stores a radioactive substance such as a nuclear fuel assembly, from the cask and refills it as an inner container of another cask. A holding means for holding the canister, an elevating means for moving the holding means up and down, a protective cylinder for covering the outer circumference of the canister held by the holding means to protect the canister, and a horizontal moving means for horizontally moving the holding means. ing.

Therefore, in the canister refill device according to the first aspect of the present invention, by taking the above-mentioned means, the canister packed in one cask can be refilled in another cask. The protective cylinder also functions as a shield that shields radiation emitted from radioactive materials such as nuclear fuel assemblies housed in the canister.

A second aspect of the present invention is the canister refilling device according to the first aspect of the present invention, in which the holding means holds the canister, and the holding means is lifted to a predetermined height to lift the canister from the cask. Pull out. Then, the holding means holding the canister is horizontally moved to the refill position where the canister is refilled with another cask by the horizontal moving means. Then, at this refill position, the holding means is lowered to insert this canister into another cask, and then the holding means releases the canister to refill the canister with another cask.

Therefore, in the canister refill device according to the second aspect of the present invention, by taking the above-mentioned means, the canister packed in one cask can be refilled in another cask.

According to a third aspect of the invention, in the canister refilling device according to the first or second aspect of the invention, the holding means is
The grip unit, the grip unit drive unit, and the interlock unit are provided. For example, fingers are applied to the grip portion,
A grasped portion such as a handle provided on the canister is grasped.
The gripper drive unit provides the gripper with a first driving force for causing the gripper to grip the gripped portion and a second driving force for causing the gripper to release the gripped portion. Further, the interlock portion is configured such that when the gripping portion is gripped by the gripping portion while the gripping portion grips the gripped portion, and the gripping portion is lifted by the lifting means raising the holding means, the interlock portion is moved to the gripping portion by the second gripping portion. Even if the driving force is applied, the gripping part is prevented from releasing the gripped part.

Therefore, in the canister refill device according to the third aspect of the invention, the gripping portion always grips the gripped portion when the canister is raised by taking the above-mentioned means. Even if the second driving force is erroneously applied from the gripper drive unit in this state, the gripper continues to grip the canister, so the safety during refilling work of the canister can be improved.

According to a fourth aspect of the invention, in the canister refilling device according to the first or second aspect of the invention, the holding means is
It is provided with a rotating body, a grip portion by fingers, a grip portion driving portion, a concave portion, and a convex portion. The rotating body rotates about a predetermined rotation axis, and the grip portion is provided on this rotating body, and the gripping target provided on the canister corresponds to the rotation angle of the rotating body about the predetermined rotation axis. A gripping state in which a portion is gripped and a non-grasping state in which a gripped portion is not gripped are realized. Further, the gripper drive unit rotates the rotating body to bring the gripping unit in the non-grasping state into the gripping state, and rotates the rotating body to bring the gripping unit into the non-grasping state. The non-grasping driving force is applied to the rotating body. Furthermore, in the gripping state, the convex portion engages with the concave portion when the raising / lowering means raises the holding means to raise the rotating body, and a non-grasping driving force is applied to the rotating body by the gripping portion drive portion. Even so, the rotation of the rotating body is prevented and the gripped state is not shifted to the non-grasped state.

Therefore, in the canister refill device according to the fourth aspect of the present invention, by taking the above-mentioned means, when the canister is raised, the mechanical interface in which the concave portion and the convex portion are fitted with each other. Since the rotation of the rotating body is blocked by the lock, even if a non-grasping driving force is accidentally given from the grip driving unit, the grip continues to grip the canister, improving the safety during refilling of the canister. be able to.

According to a fifth aspect of the invention, in the canister refilling device of the fourth aspect, a photographing means for photographing the fitted state of the concave portion and the convex portion is added.

Therefore, in the canister refilling device according to the fifth aspect of the present invention, it is possible to confirm that the concave portion and the convex portion are securely fitted by taking the above-mentioned means. The safety at the time of refilling the canister can be further improved.

According to a sixth aspect of the present invention, in the canister refill device according to any one of the first to fifth aspects,
A plurality of holding means are provided.

Therefore, in the canister refill device according to the sixth aspect of the present invention, by multiplexing the holding means as described above, the safety during the canister refill operation can be further enhanced.

According to a seventh aspect of the invention, in the canister refilling device according to any one of the first to sixth aspects,
The protective cylinder includes a shield that shields radiation emitted from the canister held by the holding unit.

Therefore, in the canister refill device according to the seventh aspect of the present invention, by taking the above-mentioned means, it is possible to reduce the exposure dose to the worker during the refill work of the canister.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

An embodiment of the present invention will be described with reference to FIGS. 1 to 6.

FIG. 1 is a diagram showing a configuration example and an operating state of a canister refill device according to an embodiment of the present invention.

That is, in the canister refilling device 1 according to the embodiment of the present invention, the canister 3 containing a radioactive substance such as a nuclear fuel assembly is extracted from the transport cask 2 and refilled with the storage cask 4. The device includes a holding mechanism 6, an elevating mechanism 7, a protection cylinder 8, and a horizontal moving mechanism 9.

As shown in FIG. 2, the holding mechanism 6 includes a handle 12 provided on the upper portion of the canister 3 and a pair of fingers 13 to form a pair of handles 12 (for example, a handle 12a shown in FIG. 3). The canister 3 is held by gripping. In addition, in order to increase the certainty when holding the canister 3, the pair of fingers 13 is doubled, and as shown in the upper sectional view of the canister 3 in FIG.
You may make it hold | grip 2a, 12b using this pair of doubled fingers 13. As shown in FIG.

Further, the holding mechanism 6 has a finger 13, a rotor 14, a pneumatic cylinder 15, a piston 16, a finger driving mechanism 17, and a wearing mechanism as shown in FIG. Bottom detection rod 1
8, the bottom detection sensor 19, the finger fixing nail 20, and the visual camera 22 are provided, and an interlock design is applied by operating them in cooperation.

That is, as shown in FIG. 4A, when the lifting table 23 of the holding mechanism 6 descends and comes close enough to the upper end side of the canister 3, the bottom sensing rod 18 moves the bottom detection rod 18.
It is pushed up by the upper end surface of the bottom of the rod, so that the tip of the bottom detecting rod 18 is brought into a detection state where the bottom detecting sensor 19 detects it. At the same time,
The finger fixing claw 20 provided integrally with the bottom detection rod 18 is pushed up above the finger 13 to enable the finger 13 to rotate about the rotation axis G of the rotating body 14.

In this state, when the pneumatic cylinder 15 is driven to push the piston 16 downward, the piston 16
The tip of the pushes the finger drive mechanism 17 toward the finger 13 side, and gives a gripping driving force to the finger 13. The finger 13 is a rotating body 14 that rotates about a rotation axis G.
Since it is integrated with the finger drive mechanism 17, the finger 13 that receives the grip driving force rotates toward the handle 12 side about the rotation axis G, and as shown in FIG.
The gripping state is such that the grip 12 can be gripped. The rotating body 14 is provided with a spring (not shown), and when the grip driving force is not received from the finger driving mechanism 17, as shown in FIG. 4A, the fingers 13 do not grip the grip 12. The gripped state is maintained.

A latch 21a is provided on the upper portion of the finger 13.
And a latch 21b. As shown in FIG. 4B, the latch 21 a drives the lifting mechanism 7 and raises the holding mechanism 6 in a state where the finger 13 can hold the handle 12, and the finger fixing claw 2
It is provided so as to fit with 0. Also, the latch 21b
As shown in FIG. 4A, the finger 13 is provided so as to fit with the finger fixing claw 20 when the lifting mechanism 7 is driven to raise the holding mechanism 6 in a state where the grip 12 is not gripped. ing.

The bottoming detection rod 18 is provided with a play H movable in the vertical direction inside the holding mechanism 6,
It is not provided integrally with the holding mechanism 6 itself. Therefore, as shown in FIG. 4B, when the lifting mechanism 7 is driven to raise the holding mechanism 6 in a state where the grip 12 can be held, as shown in FIG. While 6 itself rises, the bottom detection rod 18 has a play H
The bottom detection sensor 19 remains in the non-detection state because it remains in contact with the upper end surface of the canister 3 until it disappears.
Further, even if the finger fixing claw 20 and the latch 21a are fitted to each other and the driving force from the finger driving mechanism 17 no longer acts on the finger 13, the finger 13 always grips the handle 12. It will be in the state of being.

The visual camera 22 includes the finger fixing claws 2.
0 and the latch 21a are installed at a position where it can be photographed, so that the holding mechanism 6 can be lifted even if the finger fixing claw 20 and the latch 21a are not fitted. It is possible to check in advance so that nothing happens.

On the other hand, as shown in FIG. 1C, when the canister 3 is housed in the storage cask 4 by lowering the elevating mechanism 7, it operates as follows.

That is, first, the canister 3 lands on the bottom of the storage cask 4. Lifting mechanism 7 in that state
4B, the bottoming detection rod 18 bottoms on the upper end surface of the canister 3, and by further lowering the elevating mechanism 7, only the bottoming detection rod 18 is no longer lowered. On the other hand, while the main body of the holding mechanism 6 other than the bottoming detection rod 18 continues to descend, the tip of the bottoming detection rod 18 is detected by the bottoming detection sensor 19. In this way, the bottom detection sensor 1
When 9 is changed from the non-detection state to the detection state, the lifting mechanism 7 is stopped.

When the tip of the bottoming detection rod 18 is in a detection state where it is detected by the bottoming detection sensor 19, the finger fixing claw 20 is disengaged from the latch 21a, and the finger 13 is rotated about the rotation axis G. It becomes rotatable.

In such a state, the pneumatic cylinder 1
5, the piston 16 is moved to the upper side, and the piston 1
As shown in FIG. 4A, the canister 3 is released in a non-grasping state in which the grip 12 is not gripped by applying no gripping driving force from 6 to the finger driving mechanism 17 side. The holding mechanism 6 is raised by the elevating mechanism 7. This completes the refilling of the canister 3.

The elevating mechanism 7 is the holding mechanism 6 as described above.
A mechanism for raising and lowering the drum, as shown in detail in FIG. 5, the drum 25, the drive device 26, and the wire rope 27.
, The brake 28, the suspension 29, and the guide roller 30.
And a limit switch 31 are provided in duplicate.

The drive device 26a drives the drum 25a, and the drive device 26b drives the drum 25b. The drums 25a and 25b respectively have wire ropes 27a and 27b wound around them. And
By rotating one of the drums 25, the suspending tool 29 is moved up and down. That is, when the drive device 26 rotates the drum 25 in the forward direction, the wire rope 27 raises the lifting tool 29, and the drive device 26 causes the drum 25 to move.
If the wire rope 27 is rotated in the opposite direction, the wire rope 27
To lower. As a result, if one drum 25
Even when a does not rotate due to some trouble, the other drum 25b enables the lifting device 29 to move up and down.

The suspension 29 is connected to the holding mechanism 6,
The lifting mechanism 29 also raises and lowers the holding mechanism 6.

Brake 2 for stopping the rotation of the drum 25
8 is also doubled and provided corresponding to each of the drums 25a and 25b. That is, the brake 28a is connected to the drum 25
The rotation is stopped by applying the rotation braking force to a, and the brake 28b stops the rotation by applying the rotation braking force to the drum 25b. The brake 28 is operated in conjunction with the bottom detection sensor 19 and the limit switch 31.

That is, as shown in FIG. 4A, the lifting mechanism 7 lowers the holding mechanism 6 that does not hold the canister 3, and the bottom detection rod 18 bottoms on the upper end surface of the canister 3. When the bottoming detection sensor 19 detects the bottoming detection rod 18, it is determined that the holding mechanism 6 has descended to a height sufficient to release the canister 3, and the brake 28 applies a rotational braking force to the drum 25. To stop the rotation of. Further, as shown in FIG. 5, a guide roller 30 is provided on the upper side of the protective cylinder 8 so as to raise the holding mechanism 6 by the elevating mechanism 7 and move along the inner surface of the protective cylinder 8 as the suspending tool 29 is elevated and lowered. When the limit switch 31 is reached, it is determined that the entire canister 3 is housed inside the protective cylinder 8, and the brake 28 applies a rotational braking force to stop the rotation of the drum 25. Furthermore, the lifting mechanism 7 lowers the holding mechanism 6 holding the canister 3, and the bottoming detection rod 18 bottoms on the upper end surface of the canister 3 as shown in FIG. When the detection sensor 19 detects the bottoming detection rod 18, it is determined that the holding mechanism 6 has descended to a height sufficient to hold the canister 3, and the brake 28 applies a rotational braking force to the drum 2
Stop the rotation of 5.

The protective cylinder 8 covers the outer circumference of the canister 3 held by the holding mechanism 6 and protects the canister 3. Further, by forming the protective cylinder 8 with lead suitable for shielding γ-rays, resin suitable for shielding neutrons, etc., it is released from radioactive substances such as nuclear fuel assemblies housed in the canister 3. It is also possible to shield the radiation. Although not shown,
An opening / closing shutter is provided at the lower end of the protection cylinder 8, and when the canister 3 is housed in the protection cylinder 8, the shielding effect can be further increased by closing this shutter. Further, when the canister 3 is pulled out from the transport cask 2 and when the canister 3 is refilled into the storage cask 4, the gap between the lower end of the protective cylinder 8 and the upper ends of the casks 2 and 4 is closed. A ring 33 is provided. This makes it possible to reduce leakage of radiation when the canister 3 is pulled out from the transportation cask 2 and when the canister 3 is refilled into the storage cask 4.

The horizontal movement mechanism 9 moves the canister refilling device 1 itself from the canister pulling out place where the cask of the refilling source is provided to the canister refilling place where the cask of the refilling destination is provided along the rail 34. Move horizontally.

Next, the operation of the cask refilling device according to the embodiment of the present invention configured as described above will be described with reference to the flowchart shown in FIG.

First, as shown in FIG. 1 (a), a transportation cask 2 having an opened upper lid is mounted on a pedestal 1 of a canister refilling device according to this embodiment by a crane (not shown).
When placed on No. 1, the canister refill device 1 itself is moved to the transportation cask 2 side along the rail 34 by the horizontal movement mechanism 9 (S1).

Next, the lifting mechanism 7 lowers the holding mechanism 6 (S2). Then, as shown in FIG.
When the bottoming detection rod 18 descends to the upper end surface of the canister 3, the bottoming detection rod 18 is pushed up by the upper end surface of the canister 3, and the tip of the bottoming detection rod 18 is detected by the bottoming detection sensor 19 (S3). ). When the tip of the bottoming detection rod 18 is detected by the bottoming detection sensor 19, the brake 25 brakes the drum 25 to stop the lowering of the holding mechanism 6 (S4), and the finger fixing claws 20 move. , Is pushed upward from the upper end portion of the finger 13, and the finger 13 can be rotated about the rotation axis G.

In this state, the pneumatic cylinder 15 moves the piston 16 downward. Then, the finger drive mechanism 17 is moved by the tip of the piston 16.
Is pushed to the finger 13 side, and a grip driving force is applied to the finger 13 (S5). As a result, the finger 13 rotates around the rotation axis G toward the handle 12 side, and becomes ready to hold the handle 12 as shown in FIG. 4B (S6).

In this state, the holding mechanism 6 by the lifting mechanism 7
Begins to rise. In this case, first, while the holding mechanism 6 itself rises, the bottoming detection rod 18 remains in contact with the upper end surface of the canister 3 until the play H disappears, so as shown in FIG. While the bottom detection sensor 19 is in the non-detection state, the finger fixing claw 20 is fitted to the latch 21a (S7). The state where the finger fixing claw 20 and the latch 21a are fitted is confirmed by the visual camera 22. As a result, the rotation axis G
Even if the rotation of the finger 13 around the center of the finger 13 is blocked and the drive force from the finger drive mechanism 17 no longer acts on the finger 13, the finger 1
3 is in a state in which the handle 12 can be held at all times.

In this state, the lifting mechanism 7 raises the holding mechanism 6 (S8), and a guide roller 30 that moves along the inner surface of the protective cylinder 8 as the lifting tool 29 is raised and lowered is provided on the upper side of the protective cylinder 8. When the limit switch 31 is reached (S9), it is determined that the entire canister 3 is housed in the protective cylinder 8, and the brake 28 applies a rotational braking force to the drum 25 to cause the drum 25 to rotate. The rotation is stopped (S10).

In this way, the entire canister 3 is protected by the protective cylinder 8.
The outer periphery of the canister 3 is protected by the protective cylinder 8 by being housed inside. Further, when the protection cylinder 8 is shielded, the radiation emitted from the radioactive material such as the nuclear fuel assembly housed in the canister 3 is shielded, so that the surroundings of the canister refill device 1 are shielded. Air dose is reduced.

In this way, the canister refilling device 1 itself having the canister 3 housed in the protective cylinder 8 is moved to the canister refilling position on the storage cask 4 side by the horizontal moving mechanism 9 (S11). Then, as shown in FIG. 1C, the holding mechanism 6 is lowered by the elevating mechanism 7 at the refill position (S12). When the holding mechanism 6 is lowered and the bottoming detection rod 18 bottoms on the upper end surface of the canister 3 as shown in FIG. 4B, and the bottoming detection sensor 19 detects the bottoming detection rod 18 ( In S13), it is determined that the holding mechanism 6 has descended to a height sufficient to release the canister 3. And brake 2
A rotational braking force is applied to the drum 25 by 8 and the lowering of the holding mechanism 6 is stopped (S14).

Also, the bottom detection rod 18 is connected to the canister 3
The finger fixing claw 20 is disengaged from the latch 21a by being pushed up by the upper end surface of the, and the finger 13 becomes rotatable about the rotation axis G. Therefore, after the lowering of the holding mechanism 6 is stopped, the pneumatic cylinder 1
5, the piston 16 is moved upward, and the piston 1
By not applying the grip driving force from 6 to the finger drive mechanism 17 side, the handle 12 is not gripped as shown in FIG. 4A (S15). In this way, the canister 3 is released, and then the holding mechanism 6 is raised by the elevating mechanism 7 (S16), whereby the refilling of the canister 3 with the storage cask 4 is completed (S17).

As described above, in the canister refilling device according to the embodiment of the present invention, due to the above-described operation, when the fingers 13 of the holding mechanism 6 are lifted while holding the canister 3, the latch 21a is held. The finger 13 can be fixed by fitting the finger fixing claw 20 to. Further, this state can be confirmed by the visual camera 22.

As a result, it is possible to prevent the canister 3 that has once been lifted from being accidentally dropped. Note that the finger 13 that once holds the handle 12 of the canister 3 can release the canister 3 because the canister 3 bottoms on the transport cask 2 of the refill source or the storage cask 4 of the refill destination. Only if you do. The finger 13 is a pair of canisters 3.
However, the safety can be further improved by providing two pairs of the pair of fingers 13.

Further, in the canister refilling device according to the embodiment of the present invention, the canister 3 extracted from the transport cask 2 is lifted up, housed inside the protective cylinder 8 and moved to a predetermined refilling place. it can. By housing the canister 3 inside the protective cylinder 8 in this way, not only canister 3 is protected, but also gamma rays and neutron rays emitted from radioactive materials such as nuclear fuel assemblies housed in the canister 3 Can shield the radiation of. Therefore, it is possible to reduce the exposure dose of the worker during the refilling work of the canister 3. A limit switch 31 is provided inside the protective cylinder 8,
This allows the canister 3 to be properly stored inside the protective cylinder 8.

Further, the canister refilling device according to the embodiment of the present invention comprises the drive device 26 for the lifting mechanism 7 and the drum 2.
5, the wire rope 27, and the brake 28 are each provided in two systems, and the holding mechanism 6 can be moved up and down even if one system fails.

Refilling of the canister 3 from the storage cask 4 to the transport cask 2, or refilling of the canister 3 from the storage cask 4 to another storage cask 4,
Furthermore, refilling of the canister 3 from the transport cask 2 to another transport cask 2 can be performed in the same manner.

That is, the canister refilling device according to the embodiment of the present invention can safely, reliably and efficiently perform the lifting and lowering operations of the canister 3.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such configurations. Within the scope of the technical idea of the invention as claimed in the claims, those skilled in the art can come up with various modifications and modifications, and the modifications and modifications are also within the technical scope of the present invention. Be understood to belong to.

[0065]

As described above, according to the present invention,
It is possible to realize a canister refill device that can safely and efficiently perform the refilling work of the canister from the refill source cask to the refill destination cask.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example and an operating state of a canister refill device according to an embodiment of the present invention.

FIG. 2 is a partial vertical sectional view of a canister refill device for explaining a method of holding a canister by a holding mechanism.

FIG. 3 is a sectional view showing an example of an upper section of a canister.

FIG. 4 is a vertical cross-sectional view showing a detailed configuration example of a holding mechanism.

FIG. 5 is a perspective view showing a detailed configuration example of a lifting mechanism.

FIG. 6 is a flowchart showing the operation of the cask refill device according to the same embodiment.

[Explanation of symbols]

G ... Rotary axis 1-Canister refill device 2 ... Transport cask 3 ... Canister 4 ... Cask for storage 6 ... Holding mechanism 7 ... Lifting mechanism 8 ... Protective tube 9 ... Horizontal movement mechanism 11 ... Pedestal 12 ... Handle 13 ... fingers 14 ... Rotating body 15 ... Pneumatic cylinder 16 ... Piston 17 ... Finger drive mechanism 18 ... Bottom detection rod 19 ... Bottom detection sensor 20 ... Finger fixing claw 21 ... Latch 22 ... Visual camera 23 ... Lifting platform 25 ... drum 26 ... Drive device 27 ... Wire rope 28 ... Brake 29 ... Hanging equipment 30 ... Guide roller 31 ... Limit switch 33 ... Ring 34 ... Rail

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Iwaji Abe             1-1 1-1 Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo             No. Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Kazuo Asada             2-1-1 Niihama, Arai-cho, Takasago, Hyogo Prefecture             Takasago Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Mitsuhiro Irino             2-19-13 Takanawa, Minato-ku, Tokyo Ryoyu Co., Ltd.             Within system technology (72) Inventor Tsuneo Bandai             7-1-14 Wadamiyadori, Hyogo-ku, Kobe-shi, Hyogo             Issue Nishiryo Engineering Co., Ltd.

Claims (7)

[Claims] 1. A canister refilling device for extracting a canister, which is an inner container of a cask and which stores a radioactive substance, from the cask, and refills it as an inner container of another cask, comprising a holding means for holding the canister, And a protection cylinder for covering the outer periphery of the canister held by the holding means to protect the canister, and a horizontal moving means for horizontally moving the holding means. Canister refill device. 2. The canister refilling device according to claim 1, wherein the holding means holds the canister, and the lifting means raises the holding means to a predetermined height to extract the canister from the cask. ,
The holding means holding the canister is horizontally moved to the refill position where the canister is refilled with the another cask by the horizontal moving means, and the canister is lowered by lowering the holding means by the elevating means at the refill position. A canister refilling device, characterized in that the canister is refilled with the other cask by inserting the canister into the another cask and then releasing the canister by the holding means. 3. The canister refilling device according to claim 1, wherein the holding unit holds a gripped portion provided in the canister, and the gripping portion includes the gripped portion. A gripping part driving part for giving to the gripping part a first driving force for gripping the gripping part and a second driving force for causing the gripping part to release the gripped part; When the gripper is lifted by raising and lowering the holding means while gripping the gripper, the gripper drive unit applies the second driving force to the gripper. A canister refilling device, further comprising an interlock portion for preventing the gripped portion from releasing the gripped portion. 4. The canister refilling device according to claim 1 or 2, wherein the holding means is provided with a rotating body that rotates about a predetermined rotation axis, and the rotating body is provided with the rotating body. A gripping portion that realizes a gripping state in which the gripped portion provided in the canister is gripped, and a non-gripping state in which the gripped portion is not gripped, corresponding to a rotation angle about the predetermined rotation axis; A grip driving force for rotating the rotating body to bring the gripping portion in the non-grasping state into the gripping state, and a non-grasping for rotating the rotating body to bring the gripping portion in the gripping state into the non-grasping state In the case where the lifting unit raises the holding unit in the gripping state, the holding unit driving unit that gives a driving force to the rotating unit, the recess provided in the rotating unit, and the rotating unit moves up; , The above A protrusion that is fitted to a portion and that prevents the rotation of the rotating body even when the gripping drive unit applies the non-grasping driving force to the rotating body so that the gripping state does not shift to the non-grasping state. And a canister refilling device. 5. The canister refilling device according to claim 4, further comprising a photographing means for photographing the concave portion and the convex portion. 6. The canister refill device according to claim 1, further comprising a plurality of the holding means. 7. The canister refilling device according to claim 1, wherein the protective cylinder body is provided with a shield that shields radiation emitted from the canister held by the holding means. A canister refill device characterized in that