JPH11281791A - Storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage device effectively utilizing fuel storage pool, shortening carriage time of stored goods and reducing exposure of workers by attaining moving of the storage device and multiple layer in a fuel storage. SOLUTION: The storage device concerning the invention written in claim 1 is characterized by providing wheel 9 for moving to a storage rack 8 for storing spent fuel assembly and new fuel assembly in a storage device for storing spent fuel used in a reactor and new fuel to be used in a reactor and reactor components and the like. In this way, the space of fuel storage pool is effectively utilized, the storage capacity is increased and work time in carrying in and out of the storing objects such as in refueling is reduced, work efficiency is improved and the exposure of workers is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device for temporarily storing spent fuel and new fuel in a nuclear reactor and equipment in the reactor in a fuel storage pool or the like.

[0002]

2. Description of the Related Art In a nuclear power plant, as shown in a partially cutaway perspective view of FIG. 11, a fuel storage pool 2 adjacent to a reactor well 1 formed in an upper part of a reactor and capable of communicating with the reactor well 1 is provided. Has been built. In the fuel storage pool 2, for example, a spent fuel storage rack 5 or a storage hanger (not shown) is installed as a storage device 4 on a bottom surface 3 of the fuel storage pool 3. Spent fuel, new fuel and equipment in the reactor are stored.

Further, since radiation is generally emitted from the storage in the storage device 4 installed on the bottom surface 3 of the fuel storage pool, a worker on the operation floor 6 is provided in the fuel storage pool 2. In order to reduce the exposure of
In order to ensure a certain water depth for the storage, pool water 7 as a radiation shielding material is stored.

[0004]

Since the storage device 4 is installed on the bottom surface 3 of the fuel storage pool, in this storage device 4, both high-dose storage and low-dose storage are the same. Is stored in the pool water 7 which maintains the shielded water depth. Therefore, the shielding of radiation by the pool water 7 for workers on the operation floor 6 is naturally different between high-dose storage and low-dose storage, and therefore low-dose storage. In the case of an object, the underwater space formed above it has room, and the entire space of the fuel storage pool 2 has not been fully utilized.

In the case where the stored material is a new fuel that does not emit radiation, the fuel is transferred from the storage rack 5 of the storage device 4 installed at a deep water depth to the reactor via the reactor rack 1. There is a problem that the working efficiency is low because the distance is long and the working time is long.

[0006] Further, when the storage device 4 installed in the fuel storage pool 2 is to be relocated in the fuel storage pool 2 containing the storage items, the pool is moved by an overhead crane (not shown) installed on the ceiling of the reactor building. Move by underwater lifting work. However, an increase in the work time for the lifting work hinders an increase in worker exposure.

An object of the present invention is to make it possible to move a storage device in a fuel storage pool and to provide a plurality of stages, thereby effectively utilizing the fuel storage pool, shortening the time for loading / unloading of stored items, and exposing workers. It is to provide a reduced storage device.

[0008]

In order to achieve the above object, a storage device according to the present invention comprises a spent fuel used in a nuclear reactor, a new fuel used in the nuclear reactor, and reactor equipment. A storage device for storing spent fuel assemblies and new fuel assemblies is provided with moving wheels on storage racks for storing spent fuel assemblies and new fuel assemblies.

The storage racks for storing the spent fuel assemblies and the new fuel assemblies in the fuel storage pool can be moved freely in the fuel storage pool by moving wheels. By moving the refueling machine near the furnace, the moving distance of the refueling machine or the like is shortened, and the work time required for refueling or the like is shortened.

A storage device according to a second aspect of the present invention is the storage device according to the first aspect, wherein the storage rack is provided with a driving means for driving the moving wheels and running on its own. The storage rack, which can be moved in the fuel storage pool by the moving wheels, can be driven by driving the moving wheels by driving means, so that the storage rack can be easily moved in the pool water in the fuel storage pool. Remote operation from outside is possible.

According to a third aspect of the present invention, in the storage device according to the first aspect, the storage rack includes a moving rope and a pulling means for pulling the moving rope. The storage rack, which can be moved by the moving wheels, can be moved by pulling the combined moving rope with the towing means, so that the storage rack can be easily moved in the pool water in the fuel storage pool, and can be moved outside the fuel storage pool. Remote control from

According to a fourth aspect of the present invention, in the storage device according to the first aspect, the storage rack has vertical and horizontal moving wheels and switches the vertical and horizontal moving wheels as needed. And a driving unit which is driven in the vertical and horizontal directions by being driven. The drive means provided on the storage rack drives the vertical and horizontal moving wheels at any time so that they can be moved in the vertical or horizontal direction, and can be moved to any position in the fuel storage pool. Can be operated remotely from outside the fuel storage pool.

According to a fifth aspect of the present invention, in the storage device according to the first aspect, the storage rack is provided with moving wheels via support legs. By installing the storage rack above the fuel storage pool floor via the support legs, it is possible to straddle this storage rack without being interfered by another storage rack installed on the fuel storage pool floor. The storage rack can be moved, a plurality of storage racks can be arranged, and the space of the fuel storage pool can be effectively used.

According to a sixth aspect of the present invention, there is provided a storage device for storing spent fuel used in a nuclear reactor, new fuel used in the nuclear reactor, reactor equipment, and the like. A moving wheel is provided on a storage hanger for storing the like via support legs.

The storage hanger holding the reactor equipment and the like is installed at a position higher than the fuel storage pool floor via the support legs, and is not interfered by the storage rack installed on the fuel storage pool floor. The storage hanger can be moved across the storage rack, and the space of the fuel storage pool can be effectively used.

According to a seventh aspect of the present invention, in the storage device according to the sixth aspect, the storage hanger is provided with a driving means for driving a moving wheel to run by itself. The storage hanger which is movable by the moving wheel is self-propelled by driving the moving wheel by the driving means, so that it can easily move in the pool water in the fuel storage pool and can be remotely operated from outside the fuel storage pool. it can.

The storage device according to an eighth aspect of the present invention is the storage device according to the sixth aspect, wherein the storage hanger includes a moving rope and a pulling means for pulling the moving rope. The storage hanger that can be moved freely by moving wheels,
It is possible to move by pulling the connected moving rope by the pulling means, it is easy to move in the pool water in the fuel storage pool, and can be remotely controlled from outside the fuel storage pool.

According to a ninth aspect of the present invention, in the storage device according to the fifth to eighth aspects, the support leg has at least one support leg.
It is characterized in that it has a length that straddles a storage rack of stacking or more.

The length of the support legs for supporting the storage racks for storing the fuel assemblies or the storage hangers for holding the equipment in the reactor at the upper part of the fuel storage pool is set to a length that spans another storage rack installed in the fuel storage pool. The storage rack or storage hanger can be moved across the storage rack without interfering with the another storage rack. Further, by making the length of the support legs a plurality of stages, the storage racks can be arranged in a plurality of stages, and the space of the fuel storage pool can be effectively used.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. Note that the same components as those of the above-described conventional technology are denoted by the same reference numerals, and detailed description is omitted. The first embodiment relates to a storage rack according to claim 1,
As shown in the perspective view of FIG. 1, a storage rack 8 that stores a number of spent fuel assemblies and new fuel assemblies, which are storage devices, accommodates the spent fuel assemblies and new fuel assemblies. The portion to be moved has the same configuration as that of the conventional storage rack 5 described above, and is configured to be movable by providing a moving wheel 9 on a lower base 8a.

The moving wheels 9 may be integrated with the base 8a to form a trolley structure, and the storage rack 5 may be mounted on the trolley portion. Further, a stopper (not shown) may be provided. To maintain the stop position, thereby preventing unintentional movement due to an earthquake or the like. The moving wheels 9 of the storage rack 8 are configured so that the two groove rails 10 previously laid on the fuel storage pool floor 3 can be freely moved in the moving direction 11 (arrow). I have.

Further, FIG. 1 shows an example of the combination of the disk-shaped moving wheels 9 and the groove rails 10 buried in the fuel storage pool floor 3, When a rail is installed, the shape of the rail and the wheel can be appropriately selected, such as a configuration in which the shape of the moving wheel 9 is provided with a flange.

Next, the operation of the above configuration will be described. Storage rack 8 in pool water 7 in fuel storage pool 2
In the above, a large number of spent fuel assemblies taken out of the reactor or new fuel assemblies transported from an external facility are accommodated in an appropriate arrangement by a fuel exchanger or the like (not shown) from the upper part of the fuel storage pool 2. Then, it is temporarily stored in the pool water 7.

At this time, in the storage rack 8, the moving wheels 9
Accordingly, it can be easily moved freely in the moving direction 11 (arrow) along the groove rail 10 laid on the fuel storage pool floor 3, and can be stopped at a predetermined position. Therefore, regarding the storage rack 8 in the fuel storage pool 2, when storing a spent fuel assembly or a new fuel assembly in the storage rack 8 or removing the same,
It is previously moved to a position where the transport distance is short and workability is excellent.

As a result, it is possible to shorten the moving distance in fuel handling, reduce the steps involved in carrying in and out, and shorten the working time, thereby improving the working efficiency and reducing the exposure of workers. be able to.
Further, since the arrangement of the storage racks 8 in the fuel storage pool 2 can be easily changed, the position of the storage racks 8 is appropriately changed when temporarily storing equipment in the nuclear reactor. It is possible to effectively utilize the space in the fuel storage pool 2 including the floor surface 3 and improve the workability of handling equipment in the reactor.

Since the second embodiment is a modification of the first embodiment according to the second aspect, the same components as those of the first embodiment will be described in detail together with their operations and effects. A detailed description will be omitted, and different parts will be described. As shown in the perspective view of FIG. 2, the storage rack 12, which is a storage device, is provided below the base 8a at the lower part of the storage rack.
The moving wheels 9 and the driving means 13 for driving the moving wheels 9 are provided.

When the driving means 13 is, for example, of an electric type, it is formed of a driving motor (not shown) by electric power as a power source, a deceleration mechanism and a brake which also serves to prevent movement, and transmits electric power and a control signal. Power coupling
14 and the power / control cable connected to this power coupling unit 14
15 enables self-propelled movement.

The electric power / control cable 15 supplies electric power to the driving means 13 through the power coupling unit 14 and is provided on the operation floor 6 outside the fuel storage pool 2 or a fuel exchanger (not shown). The storage rack 12 is moved along the groove rail 10 laid on the fuel storage pool floor 3 by the operation of an operator from the operation panel in the control room.
(Arrow) to move freely. Further, the driving means 13
The power source may employ a hydraulic pump or the like as compressed air of high-pressure fluid or high-pressure oil in addition to the electric power.

The operation of the above configuration is as follows.
Since the driving means 13 is a self-propelled type, the pool water 7 in the fuel storage pool 2 is remotely operated by a worker on the operating floor 6 outside the fuel storage pool 2 or in a refueling machine or a control room. Inside, it can be lightly moved to a predetermined position along the groove rail 10 as appropriate. Further, when stopping, the vehicle is stopped by braking with a brake, and the stop position is maintained, so that it is possible to prevent unintentional movement due to an earthquake or the like.

As a result, since the storage rack 12 can be moved very easily, the handling efficiency of the spent fuel assembly and the new fuel assembly in the fuel storage pool 2 and the handling of the equipment in the reactor are reduced. In addition to the further improvement as compared with the first embodiment, there is a great effect in reducing the exposure of the workers.

Since the third embodiment is a modification of the above-described first embodiment, the same components as those of the first embodiment are described in detail together with their operations and effects. A detailed description will be omitted, and different portions will be described. As shown in the perspective view of FIG. 3, the storage rack 16 serving as a storage device includes a moving wheel 9 provided below a base 8a below the storage rack and a storage rack 16 which is connected to the front and rear of the base 8a. Wire ropes 17a and 17b and a traction device as traction means for traction in the movement direction 11 (arrow).
18a and 18b (18b is not shown) and the like.

In the case of an electric type, the traction device 18a is driven by electric power, is constituted by a drive motor, a rope winder, a brake and the like, and is operated by an operation panel (not shown). However, the hydraulic motor may be driven by using compressed air of high-pressure fluid or high-pressure oil as the drive source.

Further, as the traction means, the wire rope may be used.
In addition to the pulleys 17a and 17b and the traction device 18a, for example, a pulley 20a fixed to the wall surface of the fuel storage pool 2 to guide the wire rope 17a, and the wire rope 17b is connected to the wire rope 17a
Pulling device 18b and pulley (not shown) for pulling in a pulling direction 19b (arrow) opposite to the pulling direction 19a (arrow).
20b.

Further, the traction devices 18a and 18b are installed either on the operation floor 6 outside the fuel storage pool 2 or in the fuel storage pool 2.
When installed outside, no watertightness measures are required and maintenance and inspection are simplified. However, when installing in the fuel storage pool 2, a watertight measure is required.

The traction devices 18a and 18b are provided with interlocks that do not simultaneously perform traction operation, and are configured to be remotely operated by an operator on an operation panel outside the fuel storage pool 2. The tow device as the tow means has a structure in which the wire ropes 17a and 17b can be towed in forward and reverse directions (arrows 19a and 19b), so that only one tow device is required and the installation space is reduced. be able to.

The operation of the above configuration is as follows. When the operator operates an operation panel (not shown) outside the fuel storage pool 2, the traction devices 18a and 18b are operated, and the wire rope 17a is remotely operated to move the wire rope 17a in the traction direction 19a. Alternatively, the wire rope 17b is pulled in the pulling direction 19ba.

As a result, the storage rack 16 moves in the pool water 7 in the fuel storage pool 2 along the groove rail 10 in the moving direction.
It can be easily moved to a predetermined position by moving to 11. Further, by stopping the pulling of the wire ropes 17a, 17b in the pulling devices 18a, 18b, the storage rack 16 is stopped, and the wire ropes 17a, 17b are held by the brake, so that the movement from the stop position is prevented. You.

As a result, since the storage rack 16 can be easily moved, the handling efficiency of the spent fuel assembly or the new fuel assembly in the fuel storage pool 2 and the handling efficiency of the equipment in the reactor are reduced. In addition to the improvement as compared with the first embodiment, the effect of reducing the exposure of the worker is high.

Since the fourth embodiment is a modification of the first embodiment according to the fourth aspect, the same components as those of the first and second embodiments will be described. I omit a detailed explanation along with its actions and effects,
The different parts will be described.

As shown in the perspective view of FIG. 4, a storage rack 21 serving as a storage device is a self-propelled type, and a base 8 below the storage rack is provided.
Below a, a moving wheel 9 for the horizontal direction and a moving wheel 22 for the vertical direction are provided, and a driving means 23 for switching and driving the moving wheels 9 and 22 is provided. .

For example, in the case of an electric type, the driving means 23 comprises a driving motor (not shown), a switching speed reduction mechanism and a brake, an elevating unit for raising the moving wheels 9 and 22, and the like. And a power / control cable 15 connected to the power coupling section so as to be capable of self-propelled movement in both vertical and horizontal directions.

The electric power / control cable 15 supplies electric power as a power source to the driving means 23, and operates on the operation floor 6 outside the fuel storage pool 2, or inside the refueling machine or control room. It is driven by an operator from an operation panel (not shown). As a result, the storage rack 21 is provided with the groove rail 10, which is laid across the fuel storage pool floor 3,
Along 24, horizontal movement direction 11 (arrow) and vertical movement direction 25
It can be easily moved freely in both directions (dotted arrows).

The operation of the above configuration is as follows.
Since the motor 21 is self-propelled by the driving means 23, it is remotely controlled on the operation floor 6 outside the fuel storage pool 2, or on the operator panel in the refueling machine or control room. The movement of the storage rack 21 is carried out in the pool water 7 in the fuel storage pool 2 as shown in the layout of FIG.
Along the rail or in the vertical direction along the groove rail 24, and can be appropriately moved to a predetermined position.

In the driving means 23, as shown in FIG. 4, when moving in the horizontal direction, the moving wheel 9 for the horizontal direction is lowered to a fixed position, and then the moving wheel 22 for the vertical direction is raised ( As indicated by a dotted arrow 26), the lateral movement wheel 9 is driven to move in the lateral movement direction 11 along the groove rail 10.

In the case of vertical movement, the vertical movement wheel 22 is lowered to a fixed position, and then the horizontal movement wheel 9 is raised (arrow 27). Drive the moving wheel 22 for the vertical moving direction 25 along the groove rail 24
(Arrow). In any case, when stopping, the brake is stopped by the brake and the stop position is maintained, so that the movement of the storage rack 21 due to an earthquake or the like is prevented.

As a result, a plurality of storage racks 21 in the fuel storage pool 2 are
Along the floor of the fuel storage pool 3 in the horizontal and vertical directions and moving it to a predetermined position as appropriate is extremely easy because of the high degree of freedom of movement. Accordingly, the handling efficiency of the spent fuel assembly or the new fuel assembly in the fuel storage pool 2, the operation efficiency related to the handling of the equipment in the reactor, the utilization of the space in the fuel storage pool 2 is improved, and Exposure is greatly reduced.

The fifth embodiment is defined in claims 5 and 9.
In this regard, since this is a modification of the above-described first embodiment, detailed descriptions of the same components as those of the first embodiment will be omitted along with their actions and effects, and only the differences will be described. The perspective view of FIG. 6 shows an example of a two-stage stack, in which a storage rack 28 as a storage device is installed on the fuel storage pool floor 3 under the base 8a below the storage rack.
A trolley 30 provided with support legs 29 having a height that spans another storage rack 5
Is provided with a moving wheel 9.

By appropriately setting the length of the support legs 29, the storage rack 5 that the moving storage rack
Not only one stage installed on the floor 3 of the fuel storage pool,
Two-tiered or three-tiered stacking, etc.

A three-tiered storage rack or the like having a height further straddling the two-tiered storage rack 28 shown in FIG. 6 can be used. The object to be straddled is not limited to the storage rack 5, but is selected by the fuel storage pool floor 3, the equipment installed on the fuel storage pool floor 3, and the like (claim 9).

Therefore, the storage rack 28 is provided with the moving wheels 9.
Along the groove rail 10 laid on the fuel storage pool floor 3, crossing another storage rack 5 of a plurality of stacked stages installed on the fuel storage pool floor 3, and freely moving in the moving direction 11 (arrow). (Claim 5).

Next, the operation of the above configuration will be described. In the storage rack 28, a large number of new fuel assemblies or spent fuel assemblies are accommodated at a high position above the support legs 29, and the groove rails are provided in the pool water 7 in the fuel storage pool 2.
It is easy to appropriately move to a predetermined position in the movement direction 11 along 10.

The arrangement of FIG. 7 is a triple storage rack.
An example of the storage rack 28a is shown, and the storage rack 28a can be moved freely on the fuel storage pool floor 3 without interfering with a number of other storage racks 5 installed between the groove rails 10. You can make changes.

In the movable storage rack 28, the height of the support legs 29 is appropriately set in accordance with the depth of the fuel storage pool 2, so that the fuel storage pool floor 3
The other storage racks 5 installed in a plurality of storage racks can straddle one or more stacks. Also, for example, the groove rail 10
In parallel with this, a groove rail (not shown) is laid, and a three-tiered storage rack provided with support legs 29 having a height straddling the two-tiered storage rack 28 is movably installed on the groove rail, Three-tier stacking of storage racks is possible without interference from each other.

In particular, the new fuel assembly is stored in the uppermost storage rack 28 located above the storage rack 5 storing the spent fuel assembly since no radiation is emitted. In this case, even when the depth of the pool water 7 in the fuel storage pool 2 is shallower than that of the storage rack 5 containing the spent fuel assemblies installed on the fuel storage pool floor 3, the pool water 7 can be used. Thus, the exposure protection of the worker on the operation floor 6 is sufficiently performed.

Accordingly, in the storage rack 28, it is possible to stack the storage racks 28 at a plurality of high positions in accordance with the radiation dose from the fuel assembly. By moving the upper storage rack 28 of the storage rack 5 as well, the loading and unloading of the fuel assembly, which is a storage product, can be easily performed without any trouble. Accordingly, the space above the fuel storage pool 2 can be utilized, and the fuel storage pool 2 can be used.
Storage capacity can be increased.

The sixth embodiment is defined in claims 6 and 9
Regarding the storage hanger, the description of the same components as those of the above-described first embodiment and the effects thereof will be omitted. As shown in the perspective view of FIG. 8, a storage hanger 32, which is a storage device for temporarily storing, for example, control rods 31 such as equipment in a nuclear reactor, supports a hanger portion 33 at a height across a storage rack 5, for example. The lower part of the support leg 34 is fixed to a carriage 35 provided with the moving wheels 9 in preparation for the upper part of the leg 34.

By appropriately setting the length of the support leg 34, the storage rack 5 on which the moving storage hanger 32
For example, not only one stage installed on the fuel storage pool floor 3 but also two-stage or three-stage stacking becomes possible.
(Claim 9). Therefore, the storage hanger 32 is provided on the groove rail 10 laid on the fuel storage pool floor 3 by the moving wheels 9.
The hanger part 33 is configured to move freely in the movement direction 11 (arrow) along the storage rack 5 installed on the fuel storage pool floor 3 along the line (claim 6).

Next, the operation of the above configuration will be described. In the storage hanger 32, a hanger portion 33 provided above the high support leg 34 in the pool water 7 in the fuel storage pool 2.
In the above, the control rod 31 as the equipment in the nuclear reactor can be held, and at the same time, can be easily moved to a predetermined position in the movement direction 11 along the groove rail 10 of the fuel storage pool floor 3.

At this time, in the fuel storage pool 2,
At a high position straddling a storage rack 5 containing a large number of spent fuel assemblies or new fuel assemblies installed on the fuel storage pool floor 3, the control rods 31 for the above-mentioned equipment in the reactor are operated by the hanger part 33. Store.

Therefore, when the control rod 31 is carried out and carried in, the storage hanger is previously stored near the reactor well 1 and the like (not shown) without being interfered by the storage rack 5 installed on the fuel storage pool floor 3. By moving the 32, it is possible to shorten the transporting distance by a not-shown refueling machine or an overhead crane, which is a transporting means, so that the working efficiency is improved by shortening the working time.

Also, when carrying out and carrying out a large number of spent fuel assemblies or new fuel assemblies in the storage rack 5 in the fuel storage pool 2, the work efficiency can be similarly improved and the fuel storage pool 2 Space can be used effectively.

The seventh embodiment is defined in claims 7 and 9
In connection with this, since this is a modification of the above-described sixth embodiment, detailed description of the same components as those of the sixth embodiment along with their operations and effects will be omitted, and different portions will be described. As shown in FIG. 9, a storage hanger 36 as a storage device includes a hanger section 33 at an upper portion thereof and a storage rack 5 installed on a fuel storage pool floor 3.
Under the carriage 35 to which the supporting legs 34 are fixed, the moving wheels 9 and the driving means 13 for driving the moving wheels 9
(Claim 9).

When the driving means 13 is of an electric type, a driving motor (not shown), a power coupling section 14 formed by a deceleration mechanism and a brake and supplying electric power and a control signal, and a power coupling section The power and control cable 15 connected to 14 enables self-propelled movement.

The storage hanger 36 is connected via the power / control cable 15 on the operation floor 6 outside the fuel storage pool 2 or in a fuel exchanger or control room (not shown).
The operator can operate the operation panel to freely move in the movement direction 11 (arrow) along the groove rail 10 laid on the fuel storage pool floor 3 (claim 7).

The operation of the above configuration is such that the storage hanger 36 in which the control rods 31 such as reactor equipment are held in the upper hanger section 33 is a self-propelled type by the driving means 13. Therefore,
In the pool water 7 in the fuel storage pool 2, the groove rails 10 are operated on the operation floor 6 outside the fuel storage pool 2, or in the pool water 7 in the fuel exchanger or the control room by remote control by an operator.
It is easy to move lightly to a predetermined position along the road, and when stopping, the brake is applied, and the stop position is maintained.

Since the movement of the storage hanger 36 is extremely easy, the work efficiency related to the handling of the control rod 31 in the fuel storage pool 2 and the handling of the spent fuel assembly or the new fuel assembly is reduced by the above-described factor. In addition to the further improvement as compared with the sixth embodiment, a great effect can be obtained in reducing the exposure of workers.

The eighth embodiment relates to claims 8 and 9
In connection with this, since this is a modification of the above-described sixth embodiment, detailed description of the same components as those of the sixth embodiment along with their operations and effects will be omitted, and different portions will be described. As shown in FIG. 10, in a storage hanger 37 which is a storage device, a moving wheel 9 is provided on a bogie 35 to which a support leg 34 having a height that straddles a storage rack 5 having a hanger portion 33 at an upper portion is fixed. (Claim 9).

The storage hangers 37 are connected to each other at the lower part of the hanger part 33 to pull the storage hanger 37 in the moving direction 11 (arrow), and are constituted by wire ropes 17a, 17b and a traction device 18a. Have been. The traction device 18
In the case of the electric type, a and 18b are driven by electric power, are constituted by a drive motor, a rope winding machine, a brake, and the like, and are operated by an operator.

As the traction means, the wire rope
In addition to the pulleys 17a and 17b and the traction device 18a, for example, a pulley 20a fixed to the wall surface of the fuel storage pool 2 to guide the wire rope 17a, and the wire rope 17b is connected to the wire rope 17a
Pulling device 18b and pulley (not shown) for pulling in a pulling direction 19b (arrow) opposite to the pulling direction 19a (arrow).
Contains 20b.

Further, the traction devices 18a and 18b can be installed either outside the fuel storage pool 2 or inside the fuel storage pool 2 so as to be provided with interlocks in which the traction devices do not operate simultaneously. It is configured to be operated (claim 8).

The operation of the above configuration is as follows. When the operator operates an operation panel (not shown) outside the fuel storage pool 2, the traction devices 18a and 18b are operated, and the storage hanger 37 is remotely operated to connect the wire ropes 17a and 17a. 17b is towed in the towing directions 19a, 19b.

As a result, the storage hanger 37 moves in the pool water 7 in the fuel storage pool 2 along the groove rail 10 in the moving direction.
11, it can be easily moved to a predetermined position. Further, in the traction devices 18a, 18b, the wire ropes 17a, 17
By stopping the towing of b, the storage hanger 37 is stopped, and the movement at the stop position is prevented.

Since the storage hanger 37 is easy to move, the handling efficiency of the reactor equipment and the like in the fuel storage pool 2 and the handling efficiency of the spent fuel assembly or the new fuel assembly are improved in the sixth embodiment. In addition to the improvement in the form, the effect of reducing the exposure of the worker is high.

As described above, in each of the storage devices, it is possible to use a plurality of storage racks and the like installed in the fuel storage pool 2 and to store low-dose storage materials in the upper part of the fuel storage pool 2. Thus, the storage capacity can be increased and the space in the fuel storage pool 2 can be effectively used. In addition, the time and steps required for loading and unloading the stored items are reduced, and the exposure of workers is reduced.

[0075]

As described above, according to the present invention, the space of the fuel storage pool can be effectively used, the storage capacity can be increased, and the work time for loading and unloading the stored items at the time of refueling or the like can be reduced. This has the effect of improving work efficiency and reducing the radiation exposure of workers.

[Brief description of the drawings]

FIG. 1 is a perspective view of a storage rack according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a storage rack according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a storage rack according to a third embodiment of the present invention.

FIG. 4 is a perspective view of a storage rack according to a fourth embodiment of the present invention.

FIG. 5 is a layout diagram of a storage rack according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view of a storage rack according to a fifth embodiment of the present invention.

FIG. 7 is a layout diagram of a storage rack according to a fifth embodiment of the present invention.

FIG. 8 is a perspective view of a storage hanger according to a sixth embodiment of the present invention.

FIG. 9 is a perspective view of a storage hanger according to a seventh embodiment of the present invention.

FIG. 10 is a perspective view of a storage hanger according to an eighth embodiment of the present invention.

FIG. 11 is a partially cutaway perspective view of a fuel storage pool in a conventional reactor building.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reactor well, 2 ... Fuel storage pool, 3 ... Fuel storage pool floor, 4, 8, 12, 16, 21, 28 ... Storage device, 5 ...
Storage rack, 6: Operation floor, 7: Pool water, 8a ...
Base, 9: moving wheels (lateral direction), 10, 24: groove rail, 11: moving direction (arrow), 13, 23: driving means, 14: power coupling section, 15: power / control cable, 17a , 17b ... wire rope, 18a, 18b ... traction device (18b is not shown),
19a, 19b ... towing direction (arrow), 20a, 20b ... pulley (20b is not shown), 22 ... moving wheels for vertical direction, 25 ...
Vertical movement direction (dotted arrow), 26 ... ascending (dotted arrow), 27 ...
Ascending (arrow), 28a: triple type storage device, 29, 34: support legs, 30, 35: trolley, 31: control rod, 32, 36, 37: storage hanger, 33: hanger part.

Claims (9)

[Claims] 1. A storage device for storing spent fuel used in a nuclear reactor, new fuel used in the nuclear reactor, reactor equipment, and the like, wherein the spent fuel assembly and the new fuel assembly are stored. Storage device provided with a moving wheel in a storage rack for use. 2. The storage rack according to claim 1, wherein the storage rack includes a driving unit that drives a moving wheel to run by itself.
A storage device as described. 3. The storage device according to claim 1, wherein the storage rack includes a moving rope and a pulling means for pulling the moving rope. 4. A drive in which the storage rack is provided with vertical and horizontal moving wheels and is driven in a vertical and horizontal direction by switching the vertical and horizontal moving wheels as needed. 2. The storage device according to claim 1, further comprising means. 5. The storage device according to claim 1, wherein the storage rack is provided with moving wheels via support legs. 6. A storage device for storing spent fuel used in a nuclear reactor, new fuel used in the nuclear reactor, and reactor equipment, etc., which is supported by a storage hanger for storing the nuclear reactor equipment and the like. A storage device provided with moving wheels via legs. 7. The storage device according to claim 6, wherein the storage hanger includes a driving unit that drives a moving wheel by an external operation to run by itself. 8. The storage device according to claim 6, wherein the storage hanger includes a moving rope and a pulling means for pulling the moving rope. 9. The storage device according to claim 5, wherein the support leg has a length that straddles at least one storage rack.