JPH07215664A - Device for handling basket for spent fuel - Google Patents

Abstract

PURPOSE:To downsize a device, and to improve the efficiency, and to improve the operation factor of as equipment. CONSTITUTION:A device is formed of a bridge 23, which rides over a fuel feeding pit 1 inside of a reprocessing facility and which travels on a rail 2 laid on the floor of the pit 1, a trolley 3, which travels on a rail 24 on the bridge 23, a mast 6 extended downward from a central part of the trolley 3, a gripper 8 fitted to the lower end of the mast 6 freely to be elevated, a gripper elevating device 9 fitted to the upper end of the mast 6, and a wire rope 11, which is extended downward from an elevating hook 10 of the gripper elevating device 9 and of which one end is fixed to the upper end of the gripper 8. Since the gripper has the basket closing cover gripping function, the lock function and the basket gripping function, in the case where a basket, of which upper end opening part is closed by a basket closing cover, is handled, preparation of a new closing cover handling tool is unnecessary besides a basket handling tool, and hoisting change of these tool is unnecessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spent fuel basket handling device used for transporting a spent fuel storage basket in a reprocessing facility.

[0002]

2. Description of the Related Art Spent fuel assemblies generated in a nuclear power plant are stored in a spent fuel basket,
The spent fuel basket handling device transports the fuel to a spent fuel assembly storage pit in the plant, stores it in a fuel rack in the pit, and temporarily stores it.

A conventional spent fuel basket handling apparatus will be described with reference to FIGS. 24 to 26. Reference numeral 15 is a spent fuel assembly storage pit pit in a nuclear power plant, and 16 is a traveling laid on the floor of the pit 15. Rail, 17
Is a crane traveling on the same traveling rail 16, 19 is a basket handling tool having a basket gripping mechanism 18 at the lower end, 20 is a lifting unit provided on the crane 17, 2
Reference numeral 1 is a hook of the lifting unit 20, and 22 is a basket.

In the spent fuel basket handling device, as shown in FIG. 24, the lifting unit 2 of the crane 17 is used.
The basket handling tool 19 is hung by the hook 21 of 0, the crane 17 is moved onto the basket 22 installed in the spent fuel assembly storage pit 15, and the basket handling tool 19 is positioned. Next, as shown in FIG. 25, the hook 21 of the lifting unit 20 is lowered to seat the basket handling tool 19 on the basket 22.

Next, the basket gripping mechanism 18 is operated to connect the basket 22 and the basket handling tool 19, and then the hook 21 of the elevating unit 20 is raised to lift the basket 22 as shown in FIG. Thereafter, the crane 17 is moved to convey the basket 22 to the spent fuel assembly storage pit in the plant, and then the basket 22 is lowered and bottomed in the reverse order of the above, and the basket handling tool 19 is separated, The basket handling tool 19 is raised to complete the transportation.

[0006]

In the conventional spent fuel basket handling apparatus shown in FIGS. 24 to 26, the basket handling tool 19 is hung by the hook 21 of the lifting unit 20 of the crane 17, and the spent fuel assembly is used. Crane 17 is placed on the basket 22 installed in the body storage pit 15.
To position the basket handling tool 19,
Next, the hook 21 of the lifting / lowering unit 20 is lowered, the basket handling tool 19 is seated on the basket 22, and then the basket gripping mechanism 18 is operated to couple the basket 22 and the basket handling tool 19, and then the lifting / lowering unit 20 Raise the hook 21 to raise the basket 2
2 is lifted, then the crane 17 is moved to convey the basket 22 to the spent fuel assembly storage pit in the plant, and then the basket 22 is reversely processed.
Lower and bottom to separate the basket handling tool 19,
Since the basket handling tool 19 is lifted to complete the conveyance, the basket gripping mechanism 1 of the basket handling tool 19
8 has only the gripping function of the basket 22, and when the basket 22 whose upper end opening is closed by the basket closing lid, a new closing lid handling tool is prepared in addition to the basket handling tool 19. , These tools must be suspended.

Further, a lifting equipment for suspending tools is installed,
A tool storage place is secured, and since it is a hanging type tool, it requires operator's attendance work for almost all processes from positioning to bottom, making the equipment large, reducing efficiency, and lowering the operating rate of equipment. There was a problem of letting it.
The present invention is proposed in view of the above problems, and an object thereof is to reduce the size of equipment and improve efficiency,
The point is to provide a spent fuel basket handling device that can improve the operating rate of the facility.

[0008]

In order to achieve the above object, a spent fuel basket handling apparatus of the present invention is a rail laid on the floor of a fuel delivery pit across a reprocessing facility. A bridge that runs on the trolley, a trolley that travels on the rails on the bridge, a mast that extends downward from the center of the trolley, a gripper that is attached to the lower end of the mast so that it can be raised and lowered, and the upper end of the mast. The gripper lifting device is attached, and the wire rope extends downward from the lifting hook of the gripper lifting device and has its lower end fixed to the upper end of the gripper. The gripper has a basket closing lid gripping / locking function and a basket gripping function. Have.

[0009]

In the spent fuel basket handling apparatus of the present invention, the gripper has the basket closing lid gripping / locking function and the basket gripping function as described above, and the basket upper end opening is closed by the basket closing lid. When handling, it is not necessary to prepare a new closing lid handling tool in addition to the basket handling tool and suspend these tools. In addition, it is necessary to install lifting equipment for lifting tools, secure a storage place for tools, and, because it is a suspending tool, it is necessary for the operator to perform attendance work over almost the entire process from positioning to bottom. Without, the equipment is smaller, the efficiency is improved, and the operation rate of the equipment is improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a spent fuel basket handling device of the present invention will be described with reference to an embodiment shown in FIGS. Figure 1
FIG. 3 is a side view of a spent fuel basket handling device.
The spent fuel basket handling device has a bridge 23 that travels over rails 2 and 2 laid on the floor of the pit 1 across the fuel delivery pit 1 in the reprocessing facility, and a rail 4 on the bridge 23. A trolley (truck) 5 that runs,
A mast 6 extending downward from the center of the trolley 5, a guide rail 7 provided at the lower end of the mast 6, a gripper 8 that can be moved up and down by being guided by the guide rail 7, and an upper end of the mast 6. A gripper lifting device 9 attached to the gripper 8 and a wire rope 11 extending downward from a lifting hook 10 of the gripper lifting device 9 and having a lower end fixed to an upper end of the gripper 8. -Has a lock function and a basket gripping function.

FIG. 2 is a plan view of the fuel delivery pit 1. A spent fuel storage basket 14 and a basket closing lid 13 are stored at predetermined positions in the fuel delivery pit 1, and the spent fuel storage basket 14 of the present invention is intended to close and transport the opening of the basket 14. The basket handling device can position the gripper 8 on the basket 14 or the basket closing lid 13 at an arbitrary position by running the bridge 23, the trolley 3, and the carriage 5.

Further, the gripper 8 for holding the basket 14 or the basket closing lid 13 can raise and lower the raising and lowering hook 10 connected to the wire rope 11 by the gripper raising and lowering device 9. FIG. 3 is a side view of the gripper 8 that holds the basket 14 or the basket closing lid 13. The gripper 8 includes a body 25 (a body containing cylinders 35 and 36 (neither of which is shown)) connected to the wire rope 11 and a positioning plate 26 attached to the body 25.
A basket positioning pin 27 attached to the positioning plate 26, a closing lid positioning pin 28 attached to the positioning plate 26, a guide fitting 30 that supports a pawl 29 so that the pawl can swing, and the positioning plate. A lock plate opening / closing fitting 33 having a roller 32 attached to the lower end of the lock plate opening / closing piece 26, and an upper end fixed to the central portion of the lock plate opening / closing fitting 33 and a lower end portion in a through hole at the center of the guide fitting 30. An operating rod 31 into which the cylinder 25 is inserted, a piston rod 34 extending downward from a cylinder 35 (not shown) in the body 25 and having a lower end fixed to the central portion of the lock plate opening / closing fitting 33, and a cylinder (not shown) in the body 25. A mounting operation rod 37 attached to the movable portion of 36, a pawl operating fitting 39 attached to the lower end of the operating rod 37, and a pin on the pawl operating fitting 39. The basket gripping pawl 38, which is more pivotally supported, and the positioning plate 26 are fixed between the upper and lower portions of the positioning plate 26, and the tip end of the basket gripping pawl 38 is brought into contact with the uneven portion provided on the side surface of the pawl side. And a guide member 40 that opens and closes the basket gripping pawl 38 in the pushing direction and the retreating direction when the base is raised and lowered.

FIGS. 4 and 5 are a side view and a plan view of the basket closing lid 13. The basket closing lid 13 has a positioning hole 41 to be fitted into the closing lid positioning pin 28 of the gripper 8 (see FIG. 3), and a guide fitting 30 of the gripper 8.
The boss 42 having a through hole having a diameter larger than the diameter (see FIG. 3), a lock plate 44 that rotatably supports the boss 42 via a bearing 43, and the lock plate 4
4 and a basket closing lid 13, and a tension coil spring 45 and a guide fitting 46 provided on the upper surface of the lock plate 44.

The basket 14 (see FIG. 2) is a quadrangular prism-shaped container whose upper part is open.
As shown in FIG. 6, a positioning hole 47 that fits into the basket positioning pin 27 (see FIG. 3) of the gripper 8, a basket closing lid support plate 48, and a basket gripping pawl 3
8 (see FIG. 3) is provided with an opening 49 on the side surface of the basket 14 into which the projection enters and an opening 50 into which the tip of the lock plate 44 enters.

Next, the basket closing lid 1 by the gripper 8
3 or the handling of the basket 14 will be described with reference to FIGS. When grasping the basket closing lid 13,
As shown in FIG. 7, the gripper 8 positioned immediately above the basket closing lid 13 is lowered to insert the closing lid positioning pin 28 into the positioning hole 41, and the basket closing lid 1
The boss 42 of 3 and the guide fitting 30 of the gripper 8 are aligned, and the gripper 8 is further lowered to seat the gripper 8 on the basket closing lid 13. At this time, among the other parts, the operation rods 31, 37 and the lock plate opening / closing fitting 33 are at the upper limit position, the pawl 29 is housed inside the guide fitting 30, and the tip end portion of the basket gripping pawl 38 is It is retracting toward the inside of the gripper.

Next, as shown in FIG. 8, the operating rod 31 is extended by extending the piston rod 34 of a cylinder 35 (not shown) in the case body 25, and the closing lid opening / closing fitting 33 and the operating rod 31 are lowered to move the operating rod 31. The pawl 29 is pushed out by the tip, and the projection of the pawl 29 is projected to the outside of the guide fitting 30. In this state, the gripping of the basket closing lid 13 by the gripper 8 has been completed, and the gripper 8 is lifted so that the projection of the pawl 29 protruding from the guide fitting 30 becomes a step portion with a hole having a slightly smaller diameter than the boss 42. Engage,
The basket closing lid 13 is lifted together with the gripper 8.

When the basket closing lid 13 is gripped by lowering the operating rod 31 as described above, the closing lid opening / closing fitting 33 also descends, and the lock plate opening / closing fitting 33 is opened.
The roller 32 at the front end of the lock plate 44 is pressed against the guide fitting 46 on the upper surface of the lock plate 44. The upper surface of the guide metal fitting 46 that presses the roller 32 is inclined (see FIG. 10). Therefore, as the roller 32 descends, the lock plate 44 that is rotatably supported via the bearing 43 horizontally extends around the boss 42. Applying component force, lock plate 44
Is horizontally rotated (see FIG. 9). The rotation direction of the lock plate 44 is a direction in which the tension coil spring 45 is extended, and a direction in which the outer end of the lock plate 44 is inserted inward from the outer peripheral surface of the basket closing lid 13 (see FIG. 9).

The basket closing lid 13 is released in the reverse order. Also, the basket 1 by the basket closing lid 13
4 The opening is closed by opening the basket closing lid 13 on the opening of the basket 14. That is,
After positioning the basket closing lid 13 gripped by the gripper 8 directly above the opening of the basket 14, the gripper 8 is lowered to lower the basket closing lid 13 and the basket positioning pin 27 of the gripper 8 is positioned to the basket 14. Insert it in the hole 47 for centering the center of the basket 14 and the center of the basket closing lid 13,
Further, the gripper 8 is lowered to make the basket closing lid 13
A basket closure lid support plate 48 inside the basket 14.
Sit on top (see Figure 11).

Then, by operating the piston rod 34 of a cylinder 35 (not shown) provided in the body 25 of the gripper 8 in the contracting direction, the operating rod 31 and the lock plate opening / closing fitting 33 are raised, and the operating rod 31 is raised. By this, a projection having a large diameter of one end of the operating rod 31 is brought into contact with the inner surface of the upper portion of the pawl 29, the upper portion of the pawl 29 is pushed outward, and the protrusion provided at the lower portion of the pawl 29 is guided into the guide fitting 30. After storing, the grip of the basket closing lid 13 of the gripper 8 is released.

At the same time, by raising the lock plate opening / closing fitting 33, the roller 32 and the guide fitting 4 are
The horizontal turning force acting on the lock plate 44 via 6 is released, and the lock coil 44 is returned to the original position by the tension coil spring 45 (FIG. 12, FIG. 1).
3). By this operation, the outer end portion of the lock plate 44 penetrates the opening 50 on the side surface of the basket 14 and projects to the outside of the outer peripheral surface of the basket 14, and the basket closing lid 13 is locked to the basket 14 Complete the closing of 14 openings.

The unlocking of the basket closing lid 13 and the basket 14 is performed by holding the basket closing lid 13. To grip the basket 14 by the gripper 8, with the gripper 8 seated on the basket closing lid 13 locked to the basket 14, an operating rod 37 connected to a movable part of a cylinder 36 (not shown) provided in the body 25 of the gripper 8 is held. To lower the pawl operating metal fitting 39 pivotally supported on the basket gripping pawl 38, push out the lower inner side of the pawl 38 by the guide member 40, and let the projection on the lower outer side of the pawl 38 pass through the opening 49 of the basket 14. 14 by projecting it to the outside (see FIG. 14).
reference).

The procedure for transporting the spent fuel storage basket 14 performed by using the spent fuel basket handling device, the basket closing lid 13 and the basket 14 described above is shown in FIGS.
This will be described with reference to FIG. Spent fuel storage basket 14
In the transportation of, the bridge 23, the trolley 3 and the carriage 5 are moved to position the gripper 8 on the basket closing lid storage area 12 (see FIG. 15). Next, the gripper 8 is lowered to move the basket closing lid 1 on the basket closing lid storage area 12.
3 and the basket closing lid 13 is gripped by the gripper 8 (see FIG. 16).

Next, the gripper 8 which holds the basket closing lid 13 is raised to raise the bridge 23, the trolley 3 and the carriage 5.
To position the gripper 8 on the basket 14 (see FIG. 17). Next, the gripper 8 is lowered to seat the basket closing lid 13 on the basket 14, and the operation of gripping and releasing the basket closing lid 13 is performed to lock the basket closing lid 13 on the basket 14 (see FIG. 18).

Next, the basket gripping pawl 38 of the gripper 8 is opened and the basket 14 is gripped by the gripper 8 (see FIG. 19). Then raise the gripper 8 and
The basket 14 is lifted and the bridge 23, the trolley 3 and the carriage 5 are run to move the basket 14 to a predetermined position (see FIG. 20).

Then, the gripper 8 is lowered to seat the basket 14, and the basket gripping pawl 38 of the gripper 8 is closed to release the grip, and then the basket closing lid 1
3 is performed to grip the basket closing lid 13 by the gripper 8 and unlock the lock (see FIG. 21). Then, the gripper 8 is lifted and the basket 14
The basket closing lid 13 is removed from the rack, the bridge 23, the trolley 3 and the carriage 5 are run to position the gripper 8 on the basket closing lid storage area 12 (see FIG. 22).

Next, the gripper 8 is lowered to seat the basket closing lid 13, the grip of the basket closing lid 13 of the gripper 8 is released, and then the gripper 8 is raised to raise the bridge 23, the trolley 3 and the carriage 5. Run
The spent fuel basket handling device is returned to the initial standby position (see FIG. 23).

[0027]

As described above, in the spent fuel basket handling apparatus of the present invention, the gripper has the basket closing lid gripping / locking function and the basket gripping function, and the upper end opening of the basket is closed by the basket closing lid. When handling a closed basket, in addition to the basket handling tool,
It is not necessary to prepare new closing lid handling tools and suspend these tools. In addition, it is necessary to install lifting equipment for lifting tools, secure a storage place for tools, and, because it is a suspending tool, it is necessary for the operator to perform attendance work over almost the entire process from positioning to bottom. Without, the equipment can be downsized, the efficiency can be improved, and the operation rate of the equipment can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a spent fuel basket handling device of the present invention.

FIG. 2 is a plan view of the spent fuel basket handling device.

FIG. 3 is a vertical side view showing a gripper of the spent fuel basket handling device.

FIG. 4 is a vertical side view showing a basket closing lid.

FIG. 5 is a plan view of the basket closing lid.

FIG. 6 is a vertical side view showing the upper portion of the basket.

FIG. 7 is an operation explanatory view when the basket closing lid and the basket are handled by the gripper.

FIG. 8 is an operation explanatory view when the basket closing lid and the basket are handled by the gripper.

FIG. 9 is an operation explanatory view when the basket closing lid and the basket are handled by the gripper.

FIG. 10 is an operation explanatory view when the basket closing lid and the basket are handled by the gripper.

FIG. 11 is an operation explanatory view when the basket closing lid and the basket are handled by the gripper.

FIG. 12 is an operation explanatory view when the basket closing lid and the basket are handled by the gripper.

FIG. 13 is an operation explanatory view when the basket closing lid and the basket are handled by the gripper.

FIG. 14 is an operation explanatory view when the basket closing lid and the basket are handled by the gripper.

FIG. 15 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 16 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 17 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 18 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 19 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 20 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 21 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 22 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 23 is an operation explanatory view when the spent fuel storage basket is conveyed.

FIG. 24 is an operation explanatory view of a conventional spent fuel basket handling device.

FIG. 25 is an operation explanatory view of the spent fuel basket handling device.

FIG. 26 is an operation explanatory view of the spent fuel basket handling device.

[Explanation of symbols]

 1 Fuel delivery pit 2, 4, 24 Rail 3 Trolley 5 Truck 6 Mast 7 Guide rail 8 Gripper 9 Gripper lifting device 10 Lifting hook 11 Wire rope 12 Basket closing lid storage area 13 Basket closing lid 14, 22 Basket 15 Used fuel assembly Body storage pit 16 Traveling rail 17 Crane 18 Basket gripping mechanism 19 Basket handling tool 20 Lifting unit 21 Hook 23 Bridge 25 Body 26 Positioning plate 27 Basket positioning pin 28 Positioning pin for closing lid 29 Claw 30,46 Guide metal fitting 31,37 Operation Rod 32 Roller 33 Lock plate opening / closing fitting 34 Piston rod 35, 36 Cylinder 38 Claw for gripping basket 39 Claw operating fitting 40 Guide 41, 47 Positioning hole 42 Boss 43 Barely Grayed 44 lock plate 45 the tension coil spring 48 baskets closing lid support plate 49 and 50 openings

Claims (1)

[Claims] 1. A bridge that runs on a rail laid on the floor of the pit across a fuel delivery pit in a reprocessing facility, a trolley that runs on a rail on the bridge, and a trolley that runs downward from the center of the trolley. The extended mast, the gripper attached to the lower end of the mast so as to be able to move up and down, the gripper lifting device attached to the upper end of the mast, and the lower end of the gripper extending downward from the lifting hook of the gripper lifting device. A spent fuel basket handling device comprising a wire rope fixed to an upper end portion, wherein the gripper has a basket closing lid gripping / locking function and a basket gripping function.