JPH09127287A - Fuel replacing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quicken the work while enhancing the efficiency and safety by traveling two trucks; each mounting a transverse truck, while levitating. SOLUTION: A pair of trucks 4 are set on an operation floor 2 to travel in the horizontal direction and a transverse truck 6 is mounted on each truck 2 to travel in the perpendicular direction. A multistage telescopic mast 7 is disposed below the truck 6. All trucks 4, 6 are levitated by a pneumatic levitation means and moved, respectively, along guide rails 3, 5. At first, two trucks 6 are traveled to the central part of a monorail 5 while two trucks 4 are traveled to a predetermined position above the core part 42. A fuel 9 is then gripped and drawn out by means of the mast 7 and a fuel grip mechanism 8. Subsequently, the trucks 4, 6 are shifted to a predetermined position of a fuel storage pool 10 and the fuel 9 is landed on a rack 44. Traveling and transverse of the trucks 4, 6 are controlled automatically to avoid the interference of the mast 7 due to movement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel exchange device for speeding up fuel handling in a light water cooled nuclear reactor.

[0002]

2. Description of the Related Art Conventionally, when handling refueling of a light water cooled nuclear reactor, a traveling carriage equipped with a telescopic suspension mechanism, for example, a traverse carriage with a multistage telescopic mast, is run above the reactor pressure vessel, After extending the multi-stage telescopic mast and grasping the fuel, the multi-stage telescopic mast is contracted to take out the fuel. After that, move the traveling carriage to a predetermined position above the fuel rack in the fuel storage pool, extend the multi-stage telescopic mast to load the fuel into the storage rack, remove the fuel, and then shrink the mast to set the traveling carriage to the reactor pressure. Move above container. Hereinafter, the same operation is repeated to take out a predetermined number of fuels. Also, in the reverse order,
The new fuel installed in the fuel rack is being loaded into the reactor.

[0003]

In handling fuel in a light water cooled reactor, fuel is moved up and down from the reactor pressure vessel by a multistage telescopic mast, moved from above the reactor pressure vessel to above the fuel rack, and by a multistage telescopic mast. The movement distance of the fuel is very long because the fuel is moved up and down on the fuel rack. Therefore, it takes a long time to handle the fuel, and the fuel handling work is a critical path for the periodic inspection work of the reactor.
In order to shorten the regular inspection period, it is desirable to shorten the fuel handling period.

Conventionally, in order to shorten the fuel handling period, a multistage telescopic mast has been moved up and down at high speed, a plurality of traversing carriages and traveling carriages have been used, and a plurality of fuel suspension lines have been used. It can be shortened by only a few percent, and it has not been released from the critical path of regular reactor inspection work.

The present invention has been made in order to solve the above-mentioned problems, and aims to improve the safety of work and reduce the weight of the apparatus while making the traveling carriage and the traverse carriage move at high speed.
An object of the present invention is to provide a fuel exchange device capable of significantly reducing the fuel handling period, improving workability, and reducing manufacturing costs.

[0006]

In order to achieve the above-mentioned object, the invention of claim 1 is a traveling carriage provided on an operation floor above a reactor pressure vessel so as to be capable of traveling horizontally through a guide rail. And a traversing carriage mounted on this traveling carriage via a monorail, capable of traversing in a direction orthogonal to the traveling direction of the traveling carriage, and an extendable and retractable hanging mechanism provided below the transverse carriage so as to be capable of expanding and contracting, A fuel gripping mechanism provided at the lower end of the telescopic suspension mechanism is provided, and fuel is supplied to the reactor pressure vessel and the fuel storage pool by the relative operation of the traveling carriage, the traverse carriage, the telescopic suspension mechanism and the fuel gripping mechanism. And a fuel exchange device for moving the traveling carriage or the traverse carriage to and from the guide rail or monorail by levitation means, respectively. Characterized in that surfaced rotatably supported.

According to a second aspect of the present invention, in the fuel exchange apparatus according to the first aspect, the levitation means of the traveling carriage is an air levitation means attached to the lower surface of the traveling carriage. It is characterized in that it can move along the guide rails laid on the operation floor in a floating state.

According to a third aspect of the present invention, in the fuel exchange apparatus according to the first aspect, the traveling carriage is mounted on a guide rail laid on the operation floor, and a high frequency cable is mounted on the traveling carriage corresponding to the high frequency cable. And a coil structure for driving the traveling carriage along the guide rail.

According to a fourth aspect of the present invention, in the fuel exchange apparatus according to the first aspect, the levitation means of the transverse carriage is an air levitation means attached to the lower surface of the transverse carriage, and the air levitation means is used to move the transverse carriage. It is characterized by being able to move along the monorail in a floating state.

According to a fifth aspect of the present invention, in the fuel exchange apparatus according to the first aspect, the traverse carriage is mounted on a monorail provided on the traveling carriage, and a high frequency cable is mounted on the traverse carriage corresponding to the high frequency cable. And a coil structure for driving the traverse carriage along the monorail.

According to a sixth aspect of the present invention, in the fuel exchange apparatus according to any one of the first to fifth aspects, on the same floor along the direction connecting the reactor pressure vessel and the fuel storage pool on the operation floor. It is characterized in that a plurality of sets of guide rails having a plurality of rail elements arranged parallel to each other are laid along the left and right, and a plurality of traveling carriages are mounted so as to correspond to the guide rails of each set.

According to a seventh aspect of the present invention, in the fuel exchange apparatus according to any one of the first to sixth aspects, the traveling carriage comprises:
A wire drive device disposed at an end position of the guide rail on the operation floor, and a wire connected between the wire drive device and the traveling carriage to perform traveling drive along the guide rail. Is characterized in that.

According to an eighth aspect of the present invention, in the fuel exchange apparatus according to any one of the first to seventh aspects, the traverse carriage is:
A wire drive device arranged at an end position of the traveling carriage and a wire connected between the wire driving device and the traverse carriage are used to drive along a monorail. To do.

According to a ninth aspect of the present invention, in the fuel exchange apparatus according to any one of the first to eighth aspects, the telescopic suspension mechanism is a telescopic mast that telescopically expands and contracts.
And a mast drive mechanism for driving the mast to expand and contract.

According to a tenth aspect of the present invention, in the fuel exchange apparatus according to the ninth aspect, the multistage telescopic mast and the mast drive mechanism for driving the mast are balanced in the guide rail track direction with the monorail as a fulcrum. It is characterized in that it is provided in a transverse carriage in an arrangement.

According to an eleventh aspect of the present invention, in the fuel exchange apparatus according to any one of the sixth to tenth aspects, the multistage telescopic mast and the mast drive mechanism are mounted on the traverse carriage by means of a slide mechanism on a guide rail. It is characterized in that it is provided so as to be movable in the track axis direction.

According to a twelfth aspect of the present invention, in the fuel exchange apparatus according to the eleventh aspect, the slide mechanism is rotatable on a vertical axis by a rotating mechanism.

According to a thirteenth aspect of the present invention, in the fuel exchange apparatus according to any of the ninth to twelfth aspects, the multistage telescopic mast is a truss column structure having a triangular cross section.

The invention of claim 14 is characterized in that, instead of the multi-stage telescopic mast of claim 9, the telescopic suspension mechanism is constituted by a wire and a wire drive device for driving the wire.

According to a fifteenth aspect of the present invention, in the fuel exchange apparatus according to the second or fourth aspect, the air source of the air levitation means is:
An air hose used as an air compressor installed on the operation floor or a high pressure air source installed in the equipment attached to the reactor, and for supplying high pressure air to the floating air supply part of the traveling carriage or the traverse carriage, and the winding of this air hose. Further, an air hose for feeding out is provided on the traveling carriage or the traverse carriage.

According to a sixteenth aspect of the invention, in place of the wire and the wire drive device according to the seventh or eighth aspect, a traveling drive device or a transverse drive device capable of outputting a driving force to the traveling carriage or the traverse carriage itself is provided. Characterize.

According to a seventeenth aspect of the present invention, in the fuel exchange apparatus according to any one of the sixth to sixteenth aspects, each transverse carriage detects a relative position with respect to another transverse carriage to detect a transverse direction or a traveling direction. And a barrier forming means for forming a laser beam barrier for preventing the interference between the traversing carriages.

According to an eighteenth aspect of the present invention, in the fuel exchange apparatus according to any one of the first to seventeenth aspects, a laser-type position detecting means for measuring the telescopic position of the telescopic suspension mechanism using laser light is provided. It is characterized by

According to a nineteenth aspect of the present invention, there is provided a traveling carriage provided on the operation floor above the reactor pressure vessel so as to be horizontally movable via a guide rail, and the traveling carriage is mounted on the traveling carriage via a monorail and the traveling thereof is performed. A traversing carriage that can traverse in a direction orthogonal to the traveling direction of the carriage, a telescopic suspension mechanism that is expandable and contractable below the traversing carriage, and a fuel gripping mechanism provided at the lower end of the telescopic suspension mechanism. And a fuel exchange device for moving fuel between the reactor pressure vessel and the fuel storage pool through the reactor well by relative operation of the traveling carriage, the traverse carriage, the telescopic suspension mechanism, and the fuel gripping mechanism. The fuel gripping mechanism is characterized in that a plurality of fuel gripping members having variable lateral intervals facing each other in the lateral direction are provided at a lower end portion of the telescopic suspension mechanism.

According to a twentieth aspect of the invention, there is provided the fuel exchange apparatus according to any one of the first to eighteenth aspects.
9. The fuel gripping member according to item 9 is provided.

The invention of claim 21 is the same as claim 19 or 2.
In the fuel exchange apparatus described in 0, each fuel gripping member is rotatable about a vertical axis.

According to a twenty-second aspect of the present invention, in the fuel exchange apparatus according to any one of the first to twenty-first aspects, remote control means for remotely moving the fuel is provided, and the remote control means operates. It is characterized in that it has a camera device with a telescopic function and a swing function for monitoring the traveling carriage, the traverse carriage, the telescopic suspension means and the fuel gripping mechanism, which is detachably inserted from the floor below the reactor well. To do.

According to a twenty-third aspect of the present invention, in the fuel exchange apparatus according to the twenty-second aspect, the fixing member for fixing the camera device to the core shroud and other internal reactor structures is made of a shape memory alloy. And

According to a twenty-fourth aspect of the present invention, in the fuel exchange apparatus according to the twenty-second aspect, the fixing member for fixing the camera device to the core shroud and other nuclear reactor internals is constituted by an air cylinder. To do.

According to a twenty-fifth aspect of the present invention, in the fuel exchange apparatus according to the twenty-second aspect, the fixing member for fixing the camera device to the core shroud and other nuclear reactor internal structures has an elastic holding portion or a hooking portion. It is characterized by being configured.

According to a twenty-sixth aspect of the present invention, in the fuel exchange apparatus according to the twenty-second aspect, the camera device can be moved along a spiral guide rail installed around a vertical axis along the inner wall of the reactor pressure vessel. It is characterized by being provided.

The invention of claim 27 is based on claims 22 to 26.
In the refueling device according to any one of the above, the swing mechanism of the camera device is a spherical ultrasonic motor.

The invention of claim 28 is based on claims 22 to 27.
In the refueling device described in any of the above, the camera device is housed in a transparent watertight dome having a substantially hemispherical shape.

The invention of claim 29 is based on claims 22 to 25.
In the fuel exchange apparatus according to any one of 1 to 3, a plurality of poles extending from the operation floor to the reactor internals in the reactor pressure vessel are installed, and a camera device is attached to each pole. .

The invention of claim 30 is based on claims 22 to 29.
In the refueling device according to any one of the above, an illuminating device for irradiating a photographing direction of the camera device is provided so as to be swingable integrally with the camera device.

According to a thirty-first aspect of the invention, in the fuel exchange apparatus according to any one of the first to thirtieth aspects, a multi-staged perforated pipe is formed in a row near the wall surface of the reactor well above the reactor pressure vessel. A suction pipe for inserting the device, ejecting a water flow from each of the holes so as to generate a swirling flow above the reactor pressure vessel, and sucking water into the water surface portion of the reactor well located substantially at the center of the swirling flow. Is installed.

According to a thirty-second aspect of the present invention, in the fuel exchange apparatus according to the thirty-first aspect, a float member having a function of sucking water is connected to a tip of the suction pipe, and the float member is positioned substantially at the center of the swirling flow. It is characterized by being floated above the water surface of the reactor well.

The invention of claim 33 is the same as claim 31 or 3
The refueling device according to the second aspect is characterized in that the perforated pipe device can be deployed from the inner wall portion of the reactor well.

The invention of claim 34 is based on claims 31 to 33.
In the fuel exchange apparatus according to any one of the above, instead of the porous pipe device, a reactor well, or along the peripheral wall near the water surface across the reactor well and the fuel storage pool, from an annular pipe with a water outlet While the temperature stratification device is provided, the peripheral wall is provided with a water inlet and a heater for heating the water sucked from the water inlet and a filter for filtering, and the water discharged from the heater and the filter is heated to the temperature It is characterized in that a pump for supplying the layering device is provided.

According to a thirty-fifth aspect of the present invention, in the fuel exchange apparatus according to any one of the first to thirty-fourth aspects, water for injecting water into the fuel hung inside or below the reactor well or in the fuel storage pool is injected. It is characterized in that an injection device is provided.

According to a thirty-sixth aspect of the present invention, in the fuel exchange apparatus according to the thirty-fifth aspect, a plurality of water injection devices are installed above a core shroud in the reactor pressure vessel or a fuel storage rack in the fuel storage pool. Is characterized by.

According to a thirty-seventh aspect of the present invention, in the fuel exchange apparatus according to the thirty-first aspect, a plurality of water injection devices are installed on the wall of the reactor well or the wall of the fuel storage pool so that they can be swung. .

According to a thirty-eighth aspect of the present invention, in the fuel exchange apparatus according to any one of the first to thirty-seventh aspects, a plurality of rails for guiding a transverse carriage are provided instead of the monorail on which the transverse carriage is mounted. To do.

[0044]

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

First Embodiment (First Example) FIGS. 1 to 4 show a first example of the first embodiment of the present invention. FIG. 1 is a schematic diagram showing the overall configuration of a fuel exchange device and the operation during refueling.
FIG. 2 is an enlarged perspective view showing a main part of the apparatus shown in FIG. 3 is a plan view of FIG. 2, and FIG. 4 is A-A of FIG.
FIG.

The fuel exchange apparatus of this embodiment basically comprises a pair of traveling carriages 4 provided on the operation floor 2 above the reactor pressure vessel 1 so as to be capable of traveling horizontally through the guide rails 3. , A traversing carriage 6 mounted on these traveling carriages 4 via a monorail 5 and capable of traversing in a direction orthogonal to the traveling direction of the traveling carriages 4, and this traversing carriage 6
The multi-stage telescopic mast 7 is provided as a telescopic suspension mechanism that is extensible underneath, and a fuel gripping mechanism 8 provided at the lower end of the telescopic mast 7.

By the relative operation of the traveling carriage 4, the traverse carriage 6, the multistage telescopic mast 7 and the fuel gripping mechanism 8, the fuel 9 is transferred between the reactor pressure vessel 1 and the fuel storage pool 10 through the reactor well 11. It is designed to be moved.

In this structure, the traveling carriage 4 and the traverse carriage 6 are supported by the levitation means 12 and 13 on the guide rail 3 and the monorail 5 so as to be capable of floating in a non-contact state.

The levitation means 12 and 13 are air levitation means attached to the lower surfaces of the traveling carriage 4 and the traverse carriage 6, and are laid on the operation floor 2 in a state where the traveling carriage 4 is levitated by the air levitation means. It can be moved along the guide rails 3, and the traverse carriage 6 can also move along the monorail 5 laid on the traveling carriage 4.

The present embodiment will be described in detail below.

As shown in FIG. 3, an outer guide rail 14 and an inner guide rail 15 are laid on the operation floor 2 as guide rails 3 in a range from the reactor well 11 to the fuel storage pool 10. On the outer guide rail 14 and the inner guide rail 15, the traveling carriage 4
Large-span traveling dolly 16 and small-span traveling dolly 17
And are equipped so that they can run.

On the outer guide rails 14 and the inner guide rails 15, a structure 1 having a high frequency cable built therein is provided.
8 and 19 are attached respectively. The high-frequency cables built in these structures 18 and 19 are
The electric power for motive power and the signal are transmitted to the transverse carriage 6, and these operations are performed by non-contact electromagnetic induction using high frequency.

Air skirts 20 serving as levitation means 12 are attached to the lower surfaces of the large-span traveling carriage 16 and the small-span traveling carriages 17, respectively, and a coil structure (not shown) is attached to the inside of the air skirts 20. 17 are respectively floated on the outer guide rail 14 and the inner guide rail 15. Each traveling carriage 16,
An air compressor 21 is attached to the end of 17, and air piping is provided to the air skirt 20.

A wire driving device 22 and a pulley 23 are attached to at least one end, for example, both ends of the outer guide rail 14 and the inner guide rail 15, and the large span traveling carriage 16 and the small span traveling carriage 17 and the wire driving device 22 are attached.
Are connected by a wire 24 via a pulley 23.
The left and right traveling carriages 16 and 17 are connected by a large span monorail 25 and a small span monorail 26.

On the large-span monorail 25 and the small-span monorail 26, structures 27 and 28 each having a built-in high-frequency cable are attached, so that electric power supply and signal transmission to the transverse carriage 6 are performed. . The traverse portion 3 is provided on the lower surface of the central portion of the bogie structure portion 29 of the traverse carriage 6.
No. 0 is attached, an air skirt 31 is attached to the lower surface of the traverse portion 30 as the floating means 13, and a coil structure (not shown) is attached to the inside of the traverse carriage 6 so as to move over the large span monorail 25 and the small span monorail 26. The transverse carriage 6 is adapted to traverse.

An air compressor 32 is attached to the trolley portion 29, and air piping is provided to the air skirt 31.

Further, a wire driving device 33 is provided at both ends of the large span monorail 25 and the small span monorail 26.
A pulley 34 is attached, and the carriage portion 29 and the wire driving device 33 are connected by a wire 35 via the pulley 34.

A multi-stage telescopic mast 7 and a mast telescopic drive device 36 are mounted on the carriage 29 and the tower 3
7, and a fixed pulley 38 is attached to the upper end of the tower 37. The multistage telescopic mast 7 and the mast telescopic drive device 36 are connected by a wire 39 via a constant pulley 38. The mast expansion / contraction drive device 36 and the carriage portion 29 are coupled via a slide mechanism 40, and the slide mechanism 40 is driven by a drive mechanism 41.

Although not shown, the television camera for viewing the reactor core 42 and the position of the multi-stage telescopic mast 7 mounted on the traveling truck 4 are monitored around the bogie 29 where the multi-stage telescopic mast 7 is attached. A TV camera is installed to do this. In addition, two TV cameras for monitoring the operating states of the traveling carriage 4 and the transverse carriage 6 are installed in the operation floor room. As a result, the traveling carriage 4, the traverse carriage 6 and the multi-stage telescopic mast 7 are driven, and the fuel 9
The gripping operation and the like are controlled fully or semi-automatically by remote control using a TV camera. Note that these TV cameras will be described in later embodiments.

Next, the operation will be described.

In the case of refueling, first, the lid of the reactor pressure vessel 1 of the light water cooling reactor is removed, and the operator attaches the multistage telescopic mast 7 to the large span traveling carriage 16 and the small span traveling carriage 17. . Further, the wire 39 is attached to the multi-stage telescopic mast 7 via the constant pulley 38, and the extension limiting metal member of the multi-stage telescopic mast 7 is removed so that the multi-stage telescopic mast 7 can be extended.

Next, the operator in the remote control room remotely operates the air compressor 32 attached to the traverse carriage 6 to supply high-pressure air to the air skirt 31 so that the traverse carriage 6 can have a large span monorail. 25 and small span monorail 26 are levitated. Then, the wire driving device 33 attached to the end of the monorail 25 is driven to drive the wire 3
5 is moved via the pulley 34, and the traverse carriage 6 is traversed so as to come to the center of the large span monorail 25 and the small span monorail 26.

When the traverse carriage 6 reaches a predetermined position, the pressure in the air skirt 31 is released, and the traverse carriage 6 is stopped at the center of the large span monorail 25 and the small span monorail 26.

An operator in the remote control room remotely drives the air compressor 21 mounted on the traveling carriage 4 to supply high-pressure air to the air cart 20 mounted on the lower surface of the traveling carriage 4 for a large span. Traveling bogie 16 and small span traveling bogie 1
7 to the outer guide rail 14 and the inner guide rail 15
More surface each. Then, the wire driving device 22 attached to the end of the guide rail 3 is driven to move the wire 24 via the pulley 23, so that the large-span traveling carriage 16 and the small-span traveling carriage 17 are located above the reactor core portion 42. Drive so that it comes to the position.

When the transverse carriage 6 comes above the reactor core 42,
The mast expansion / contraction driving device 36 is driven to deploy the multi-stage expansion / contraction mast 7 downward. By the traverse and traveling of the traverse carriage 6, the large-span traveling carriage 16, and the small-span traveling carriage 17, the fuel gripping mechanism portion 8 attached to the lower end of the multi-stage telescopic mast 7 comes just above the fuel 9 to be taken out. It is desirable to automatically control the expansion of the multistage telescopic mast 7 so that the expansion to a predetermined height is completed.

Then, a television camera (not shown) arranged around the multi-stage telescopic mast 7 of the trolley portion 29, or the water surface of the traverse trolley 6 within a range not disturbing when the multi-stage telescopic mast 7 passes through the canal 43. Using the TV camera inserted below, the position of the fuel 9 to be taken out is recognized on the image, the position of the fuel gripping mechanism 8 is compared with the result obtained by measurement or analysis, and control of traverse, running and deployment is performed. To do. These pieces of information and images are overlaid and displayed on the TV monitor in the remote control room, and the operator monitors the driving situation online with visual information.

The multi-stage telescopic mast 7 mounted on the traverse vehicle 6 traversing over the large-span traveling carriage 16 and the small-span traveling carriage 7 does not interfere with the multi-stage telescopic mast 7 and is placed directly above the fuel 9 to be taken out. Before moving the telescopic mast 7, the positions of the two transverse carriages 6 in the transverse direction are changed. The two transverse carriages 6 can be arranged in a row in the transverse direction so as to be in a so-called nested state, and control can be performed so that the distance between the two traveling carriages 4 can be minimized.

When such traverse or traveling control is performed, the television camera mounted on the traveling carriage 4 is used to photograph the multistage telescopic mast 7 mounted on another traveling carriage 4, and image processing is performed to perform mutual image processing. Find the position (relative distance) in the plane,
It is desirable to perform operation control to avoid interference.

When the fuel gripping mechanism 8 attached to the lower end of the multi-stage telescopic mast 7 is developed to a predetermined height just above the fuel 9 to be taken out, the fuel gripping mechanism 8 multi-steps at a slight speed to a height at which the fuel 9 can be gripped. Deploy the telescopic mast 7.

After the expansion is completed, the fuel gripping mechanism 8 controls the fuel 9 by remote control. When the gripping is completed, the storage of the multi-stage telescopic mast 7 for raising the fuel 9 to the position where the fuel 9 is pulled out is controlled.

When the fuel 9 is drawn out, the carriage 2
The drive mechanism 41 fixed to 9 is driven to operate the slide mechanism 40 in the direction in which the mast expansion / contraction drive device 36 is separated from the tower 37, so that the moment when the fuel 9 is suspended by the multistage expansion / contraction mast 7 is balanced.

When the fuel 9 is completely withdrawn from the core portion 42, the mast expansion / contraction drive device 36 is continuously driven so that the lowermost end of the fuel 9 gripped by the fuel gripping mechanism 8 of the multistage expansion / contraction mast 7 passes through the canal 43. The multi-stage telescopic masts 7 mounted on the traverse carriages 6 which are stored to a height as high as possible and traverse over the large-span traveling carriage 16 and the small-span traveling carriage 17 before passing the canal 43 are arranged in a line in the traveling direction. Further, the traverse and traveling of the traverse carriage 6, the large span traveling carriage 16 and the small span traveling carriage 17 are automatically controlled so that they do not interfere with each other.

When the fuel 9 gripped by the fuel gripping mechanism 8 of the multistage telescopic mast 7 passes through the canal 43, the positions of the two transverse carriages 6 are changed in the transverse direction, and the transverse carriages 6 are arranged in a row in the transverse direction. Nest it. Thus, 2
Interference avoidance control of the multi-stage telescopic mast 7 including control to minimize the distance between the traveling carriages 4 is performed. Then, the lowest end of the fuel 9 held by the fuel holding mechanism 8 of the multistage telescopic mast 7 is located at a position within a predetermined plane of the fuel storage rack 44 installed in the fuel storage pool 10. The transverse carriage 6, the large-span traveling carriage 16 and the small-span traveling carriage 17 are controlled to travel and travel so as to have a predetermined height above 44.
The mast expansion / contraction driving device 36 is driven to automatically expand the multi-stage expansion / contraction mast 7.

When the fuel 9 reaches the predetermined in-plane position and height, the mast expansion / contraction drive device 36 is driven, and the multi-stage expansion / contraction mast 7 is unfolded until the fuel 9 reaches the fuel storage rack 44.

When the fuel 9 has landed on the fuel storage rack 44, the holding state of the fuel 9 by the fuel holding mechanism 8 is released. When releasing the gripped state of the fuel 9, the drive mechanism 41
Drive the mast expansion drive 36 to the tower 37.
The sliding mechanism 40 is moved in the direction of approaching the position so that the moment when the connection of the fuel 9 is released from the multi-stage telescopic mast 7 is balanced.

When the release of the gripped state of the fuel 9 is completed, the mast expansion / contraction drive device 36 is driven to drive the multi-stage expansion / contraction mast 7.
The lowermost end of the fuel gripping mechanism 8 is stored to a height that allows the canal 43 to pass therethrough, and is mounted on the traverse carriage 6 that traverses the large span traveling carriage 16 and the small span traveling carriage 17 before passing through the canal 43. The multi-stage telescopic masts 7 are controlled so as to be lined up in the running direction. At the time of control, the traverse carriage 6, the large span traveling carriage 16 and the small span traveling carriage 17
Be careful not to interfere with each other. Multi-stage telescopic mast 7
When the vehicle passes the canal 43, the positions of the two transverse carriages 6 in the transverse direction are changed, and the above-described work of taking out the fuel 9 is repeated.

When the fuel 9 is transferred from the fuel storage rack 44 to the core portion 42, the state in which the fuel 9 is held and the state in which it is not held are reversed in the above operation control.

Further, a seismograph (not shown) is installed on the operation floor 2 side, and when the seismograph detects acceleration of a certain value or more, the traverse carriage 6, the large-span traveling carriage 16 and the small-span traveling carriage are provided. It is desirable to release the gripped state of the wires 24 and 35 installed inside the wire drive devices 22 and 33 of 17. Then, during the earthquake, the air skirts 20 and 31 continue to be supplied with high-pressure air.

According to the configuration of the first example of the first embodiment described above, the traveling carriage 4 is mounted on the operation floor 2
In which the traveling rail 4 is provided with the monorail 5 and the traverse truck 6 is mounted on the monorail 5, the traverse truck 6 and the traveling truck 4 are levitated by the air skirts 20 and 31. By doing so, the operation becomes smooth, the fuel exchange work can be performed quickly and easily, the number of components can be reduced, the weight can be reduced, the drive device can be downsized, and the manufacturing cost can be reduced. .

Further, since air skirts 20 and 31 are provided on the lower surfaces of the traversing carriage 6 and the traveling carriage 4, when an earthquake occurs, the drive devices are separated to provide vibration isolation, so that it is possible to prevent an earthquake. The safety can be improved, and the transverse carriage 6 and the traveling carriage 4 can be improved in a flexible structure to reduce the amount of material and the manufacturing cost.

Moreover, the non-contact electromagnetic induction utilizing high frequency is used to supply power for motive power to the transverse carriage 6 and the traveling carriage 4,
It becomes possible to reduce the quantity of the power cable winding device for transmitting the signal, and the traveling carriage 4 has a flexible structure, so that the quantity and the manufacturing cost can be reduced.

Further, two sets of guide rails 3 for supporting the traveling carriages 4 are provided on the operation floor 2 so that the two traveling carriages 4 are assembled in a nested manner, so that they can be arranged in the transverse direction. As a result, it is possible to effectively prevent the traveling carriage 4 from toppling over in the event of an earthquake, and to improve the reliability of the traveling carriage 4, for example, by providing a structure with wide legs in the traveling direction.

(Second Example) FIG. 5 shows a second example of the first embodiment. In this embodiment, the multistage telescopic mast 7 and the mast telescopic drive device 36 in the first embodiment are used.
And by a slide mechanism to raise the monorail 5
The structure is such that it can move in a direction orthogonal to the direction.

That is, as shown in FIG. 5, in this second embodiment, both the multistage telescopic mast 7 and the mast telescopic drive device 36 are slid on the bogie portion 29 of the traverse carriage 6 respectively. Via 46, it is movably coupled in a direction along the guide rail 3, that is, in a direction orthogonal to the monorail 5. The slide mechanisms 45 and 46 are independently driven by a drive mechanism 66 attached to the lower portion of the tower 37. Since other configurations are substantially the same as those of the first embodiment, the same reference numerals as those in FIG. 2 are given to FIG.

According to this embodiment, in addition to the same effects as the first embodiment, the traverse carriages mounted on the traveling carriages 4 with the two traveling carriages 4 stopped. By driving the slide mechanisms 45 and 46 respectively on 6, the fuel 9 can be handled by changing the relative position on the plane of the two multi-stage telescopic masts 7, and the nesting state amount of each multi-stage telescopic mast 7 can be handled. Can increase the flexibility of fuel handling schedule planning.
Control becomes easy.

(Third Example) FIG. 6 shows a third example of the first embodiment. In this embodiment, in addition to being able to move the slide mechanisms 45 and 46 mounting the multistage telescopic mast 7 and the mast telescopic drive device 36 in the second embodiment in a direction orthogonal to the monorail 5, these slide mechanisms 45 and 46 are also provided. Is rotatable about the vertical axis.

That is, as shown in FIG. 6, in the third embodiment, the slide mechanisms 45 and 46 for supporting the mast expansion / contraction drive device 36 and the multi-stage expansion / contraction mast 7 of the transverse carriage 6 rotate via the carriage 29. It is rotatably supported by a mechanism around a vertical axis. Since other configurations are substantially the same as those of the second embodiment, the same reference numerals as those in FIG.
Description is omitted.

According to this embodiment, in addition to the same effects as those of the second embodiment, by rotating the carriage 29 by the rotating mechanism 48, the fuel within a certain range by the multistage telescopic mast can be obtained. Because it can handle
Further, it is possible to variously change the form of fuel handling within a certain range without moving the traveling carriage 4, the degree of freedom in planning a fuel handling schedule is increased, and the control can be easily performed.

(Fourth Example) FIG. 7 shows a fourth example of the first embodiment. In this embodiment, the multi-stage telescopic mast 7 in the first embodiment is a multi-stage telescopic truss column structure having a triangular horizontal plane shape.

That is, as shown in FIG. 7, in the fourth embodiment of the present invention, the mast telescopic drive device 36 is mounted on the bogie portion 29 of the transverse bogie 6 via the rotating mechanism 48, and A tower 37 is connected to the drive device 36 so as to be tiltable in the direction of the guide rail 3 around a fulcrum 49 at the lower end. The intermediate arm 50 is a fulcrum 5 at the upper end of the tower 37.
1 is swingably mounted around the center of the mast 1, and the upper end of a multi-stage retractable truss column structure mast 7 having a triangular horizontal plane is connected to the intermediate arm 51 via a fulcrum pin 52. Then, the mast expansion / contraction drive device 36 and the mast 7 are connected by a wire 53, and a plurality of types are used in combination with the wire 53, whereby the multistage expandable truss column structure mast 7 is expanded / contracted in the vertical direction. At the same time, the tower 37 is tilted and the intermediate arm 50 is rocked. Since other configurations are substantially the same as those of the third embodiment, the same reference numerals as those in FIG. 6 are given to FIG. 7 and the description thereof is omitted.

In the fourth embodiment thus constructed, since the multi-stage telescopic mast 7 is the multi-stage telescopic truss column structure mast having a triangular shape in the horizontal plane, the multi-stage telescopic truss is used when traversing and running. The operation control is performed in consideration of the large backlash of the pillar structure mast 7.
Then, the wire 52 connects the intermediate arm 50 and the tower 37.
The distance from the guide rail 3 of the multi-stage telescopic truss column structure mast 7 can be adjusted by changing the inclination of the.

According to this embodiment, in addition to the same effects as those of the third embodiment, the multi-stage telescopic mast 7 adopts a multi-stage telescopic truss column structure mast having a triangular horizontal plane shape. A high-rigidity mast is obtained with the traveling carriage 4
In addition to being able to reduce the weight, it is possible to reduce the size of the drive device and reduce the manufacturing cost.

(Fifth Example) FIG. 8 shows a fifth example of the first embodiment. In this embodiment, the multi-stage telescopic mast 7 in the fourth embodiment is used as the telescopic suspension mechanism, and the suspension wire 54 having the fuel gripping mechanism 8 attached to the tip thereof is applied.

That is, as shown in FIG. 8, in the fifth embodiment, the rotating mechanism 48 is coupled to the carriage portion 29 of the transverse carriage 6, and the wire driving device 55 and the tower 3 are connected to the rotating mechanism 48.
7 and the intermediate arm 50 are connected in sequence. Then, the wire 56 of the wire drive device 55 is used as a wire used for tilting the tower 37 and the intermediate arm 50 and a wire 54 for lifting and lowering the fuel gripping mechanism 8 as in the fourth embodiment. It consists of things and things. Since other configurations are substantially the same as those of the fourth embodiment, the same reference numerals as those in FIG.

In the fifth embodiment thus constructed, the suspension wire 54 having the fuel gripping mechanism 8 attached is used instead of the multi-stage telescopic mast 7, so that the traverse carriage 6 and the traveling carriage 4 move. However, the operation control is performed in consideration of the large delay in the followability of the fuel gripping mechanism 8.

According to this embodiment, the same operation and effect as in the fourth embodiment are added, and by using the retractable suspension mechanism as the suspension wire 54, a lightweight fuel handling mechanism can be obtained and the traveling carriage 4 can be reduced in weight, the drive device can be further downsized, and the manufacturing cost can be reduced.

(Sixth Example) FIG. 9 shows a sixth example of the first embodiment. In this embodiment, instead of the multistage telescopic mast interference avoiding means using the television camera of the first embodiment, a device for forming a laser light barrier is attached around the traverse carriage 6.

That is, as shown in FIG. 9, in this embodiment,
A traverse direction laser light transmitter / receiver 57 and a traveling direction laser light transmitter / receiver 58 are attached to the carriage portion 29 of the multistage telescopic mast 7 of each traverse carriage 6.

In the sixth embodiment thus constructed, for example, each laser light transmitter / receiver 5 of one of the transverse carriages 6 is
7,58, laser beam barrier 5 around the traverse carriage 6
When the multi-stage telescopic mast 7 of the other traverse vehicle 6 that has formed 9, 6, 61, 62 enters the interference area, it is detected. Then, the multistage telescopic mast 7 stops or avoids the driving of the transverse carriage 6 and the traveling carriage 4 that have entered the interference area, or stops the driving of the transverse carriage 6 and the traveling carriage 4 forming the laser light barrier. Or, control such as avoidance is performed. The operation control is performed to determine which trolley is to be stopped, for example, to give priority to the person who can shorten the work as a whole.

For example, a laser beam in the transverse direction (left side transmission laser beam 59, right side transmission laser beam 60) is applied to the traveling carriage 4 to measure the distance. The sum of both measured distances is calculated, and when the sum is reduced from a fixed value, it is determined that another multi-stage telescopic mast 7 has entered the interference area. Further, the transverse carriage 6 is irradiated with laser light in the traveling direction (left-side transmission laser light 61, right-side transmission laser light 62) to measure the distance. If there is a difference between the two measured values, it indicates that another multi-stage telescopic mast 7 may be included in the interference area. Then, a value obtained by measuring the distance between the traverse vehicle and the traveling vehicle using the laser light is subjected to arithmetic processing, and the result is used to judge the presence or absence of interference and drive.

According to this embodiment, in addition to the effects of the first embodiment, a laser light barrier is formed around the transverse carriage 6 to detect that another multi-stage telescopic mast 7 has entered the interference area. By doing so, since they stop each other or immediately enter into the avoidance action, it is possible to improve safety when performing fuel handling work using the two multi-stage telescopic masts 7.

(Seventh Example) FIG. 10 shows a seventh example of the first embodiment. This embodiment is the first embodiment,
In the configuration having the cylindrical multi-stage telescopic mast 7 or the mast having the triangular prism multi-stage telescopic truss structure or the fuel gripping mechanism 8 suspended by the hanging wire 54 in the fourth or fifth embodiment, the mast 7 or the wire 54 It is possible to irradiate a blue laser beam from the traversing carriage 6 to the tip end of the vehicle and perform operation control while measuring the position.

For example, as shown in FIG. 10, a position for measuring a position by a blue laser oscillator 64 that irradiates the blue laser light 63 toward the lower end of the multi-stage telescopic mast 7 and the reflected light is measured. A detection device 65 is attached. The blue laser oscillator 64 may be attached at a position below the water surface.

According to this structure, the multistage telescopic mast 7 is deployed, the traverse vehicle 6 and the traveling are used by using the result of measuring the position by irradiating the tip end of the multistage telescopic mast 7 with the blue laser beam from the traverse vehicle 6. It is possible to control the traverse and traveling of the carriage 4 and to control the fuel handling.

Therefore, in addition to the same effects as those of the first, fourth, or fifth embodiment, by directly measuring the position of the tip of the multistage telescopic mast 7 or the like with the blue laser light, It is possible to set a low speed operation range near the joint of the multi-stage telescopic mast 7 to be narrow, improve the operation controllability for shortening the mast telescopic time, and improve the reliability of fuel handling.

By placing the blue laser oscillator 64 in water, the reflection on the water surface can be ignored and the reliability of measurement can be improved. Further, the same can be applied to the case of a hanging wire.

(Eighth Example) FIG. 11 shows an eighth example of the first embodiment. In this embodiment, an air compressor is installed on the operation floor 2 instead of mounting the air compressor on the traverse carriage 6 and the traveling carriage 4 in the first embodiment, and the hoses are wound on the traverse carriage 6 and the traveling carriage 4. The device is attached.

That is, as shown in FIG. 11, the air compressor 66 is installed on the guide rail extension line of the operation floor 2, and the air hose 67 connected to the air compressor 66 is connected to the outer guide rail 14 and the inner side. It passes through the guide rail 15 and is guided to the traveling carriage 4. The traveling carriage 4 is provided with an air hose winding device 68, and the air hose winding device 68 winds the air hose 67 as the traveling carriage 4 travels.

Further, the air hose 67 is guided to the transverse carriage 6 along the monorail 5. The traverse carriage 6 is also provided with an air hose winding device 69. Then, high pressure air can be supplied from the air hoe 67 to the air skirts 20, 31. The air hose take-up devices 68 and 69 have a force balance type take-up function by a spring force.

Even with such a configuration, the above-mentioned first
Although the same effect as that of the embodiment is achieved, in this embodiment, the air skirts 20 and 3 are simply driven by driving the air compressor 66.
It is possible to supply high pressure air to 1. Since the air hose take-up devices 68, 69 are provided with a take-up function by a force balance type spring force, take-up and unwinding are performed according to the traverse and travel of the traverse carriage 6 and the traveling carriage 4. For this reason, it is not necessary to perform a winding operation or the like especially by a person.

In this embodiment, the high pressure air source for the air skirts 20 and 31 is the operation floor 2
Although the air compressor 66 installed above is used, it is not limited to this.
An existing high-pressure air source attached to a nuclear power plant (not shown) may be applied.

(Ninth Example) FIG. 12 shows a ninth example of the first embodiment. In this embodiment, the wire driving device 22, 33 in the first embodiment is driven to drive the wire 2
Instead of traversing and traveling the traverse carriage 6 and the traveling carriage 4 at 4, 35, a traverse drive device and a traveling drive device for self-propelling are installed in the traverse carriage 6 and the traveling carriage 4, respectively.

That is, as shown in FIG. 12, a traverse drive device 70 for self-propelled on the traverse carriage 6 and the traveling carriage 4 using the monorail 5 and the guide rail 3 as tracks.
And a traveling drive device 71 is provided. The traverse drive device 70 and the traveling drive device 71 are used for the monorail 5
And a drive wheel that rotates in contact with the side surface of the guide rail 3.

According to such a configuration, the traverse drive device 7
0 and the traveling drive device 71 are driven to rotate the drive wheels that are in contact with the side surfaces of the monorail 5 and the guide rail 3, respectively, so that the traverse carriage 6 and the traveling carriage 4 are traversed and run, respectively, and the fuel 9 It can be moved for handling such as exchange.

Therefore, in this embodiment, it is not necessary to provide the wire driving devices 22 and 33, the wires 24 and 35, and the like.

Desirably, when the seismograph installed on the operation floor 2 detects an acceleration of a certain value or more, the drive wheels are disconnected from the traverse drive device 55 and the traveling drive device 43, and the drive wheels are disconnected. May be rotatable and can take a fall moment.

(Other Examples of First Embodiment) In each of the above-described examples, the structure 1 having the high-frequency cable built-in on the outer guide rails 14 and the inner guide rails 15 is constructed.
8 and the large span monorail 25 and the small span monorail 26 respectively have a structure in which high-frequency cables are built in, but the structure is not limited to this, and a cable winding device is attached to the traverse carriage 6 and the traveling carriage 4, and the traverse carriage 6 is used. Alternatively, the power for driving and the control signal may be transmitted to the traveling vehicle 4.

Further, in the second embodiment, the mast telescopic drive device and the multistage telescopic mast are mounted on the tip of the structure which telescopes in the direction perpendicular to the monorail (traveling direction),
Both elastic structures may be mounted in a balanced manner with the monorail as a fulcrum.

Further, instead of laying a monorail on the traveling carriage in the first embodiment and traversing the traverse carriage on the monorail, the traverse carriage is made to traverse on a plurality of rails,
An air compressor may be attached to the lower surface of the traverse vehicle.

Furthermore, instead of laying a monorail on the traveling carriage in the first embodiment and traversing the traveling carriage on the monorail, an air compressor may be attached to the lower surface of the traveling carriage traveling on a plurality of rails. In addition, a monorail is laid on the traveling carriage in the first embodiment, a plurality of rails are laid instead of traversing the traveling carriage on the traveling carriage, and a structure containing a high-frequency cable is installed on the rail. The coil structure may be installed in correspondence with the above.

Second Embodiment FIGS. 13 to 17 show a second embodiment of the present invention. The present embodiment relates to a fuel gripping mechanism portion, FIG. 13 is a plan view, FIG. 14 is a longitudinal sectional view, and FIGS. The overall configuration of the fuel exchange device is the first
The description is omitted because it is substantially the same as that of the embodiment.

This embodiment is roughly described by providing a horizontal plane rotating mechanism at the tip (lower end) of the multi-stage telescopic mast 7 of the triangular prism truss structure of the fourth example of the first embodiment, and holding the fuel in the horizontal plane rotating mechanism. Two sets of mechanisms are attached, and a mechanism for varying the distance between both fuel gripping mechanisms is provided.

More specifically, as shown in FIGS. 13 and 14, the lower end portion 7 of the multi-stage telescopic mast 7 having the triangular prism truss structure.
The in-horizontal-plane rotating mechanism 73, in which the in-horizontal-plane rotating mechanism 73 is provided in FIG. The rotating shaft 75a of the rotating mechanism 75 penetrates the central hole of the lower end portion 72 and vertically projects downward.

On the other hand, a rotary plate 76 having a U-shaped cross section is provided on the lower surface of the lower end portion 72, and two sets of fuel gripping mechanisms 8 are provided below the rotary plate 76 in a state in which the horizontal gap can be adjusted. There is. That is, a screw rod 77 is installed on the rotary plate 76, and the screw rod 77 is connected to a drive unit 78 such as a motor via a gear set 79 so that the screw rod 77 can rotate forward and backward. A pair of rotatable suspending members 81 are suspended from the rotating screw rods 77 via nut portions 80, and the fuel gripping mechanism 8 is attached to each suspending member 81. Reference numeral 82 in the figure denotes an upper lattice plate of the core.

Next, the operation will be described.

FIG. 15 is a core map in a state in which fuel is loaded in the core in a state where the periodic inspection is started, FIG. 16 is an enlarged view of a part of FIG. 15, and FIG. 17 is a staggered grid pattern. 3 is a core map showing a state in which fuel is taken out.

The overall operation including the traverse carriage, the traveling carriage, etc. is substantially the same as that of the first embodiment described above, and therefore its explanation is omitted.

In this embodiment, when the fuel 9 is taken out from the reactor core, the multi-stage telescopic mast 7 having the triangular prism truss structure is expanded to a predetermined height, and the center position of the lower end portion 74 is set to the center position of the control rod 83 at the take-out position. Match with C. Further, the rotating mechanism 75 is driven to rotate the rotating plate 76 around the rotating shaft 75a so that the two sets of the fuel gripping mechanisms 8 are oriented in such a manner that the fuel can be taken out in a staggered manner (state of FIG. 13). At the same time, the drive unit 78 is driven to set the gap between the two sets of fuel gripping mechanisms 8 to a predetermined value.

When these operations are completed, the multistage telescopic mast 7 is expanded to a position where the fuel 9 can be gripped, the fuel 9 is gripped, and the fuel 9 is pulled out. When the drawing of the fuel 9 from the core is completed, two sets of the fuel gripping mechanism 8
The rotating plate 76 is rotated by the rotating mechanism 75 so that the lined up directions are perpendicular to the traveling direction of the traveling carriage 4. Further, the interval between the two sets of the fuel gripping mechanism 8 is set to the canal 43.
Use the maximum spacing that does not cause problems when passing (see Figure 1).

FIG. 17 shows the state in which the fuel 9 is extracted from the core in the staggered arrangement in this way. In FIG. 17, a blank portion 83 between the upper lattice plates 82.
Is the fuel removal position.

According to this embodiment, two sets of fuel gripping mechanisms 8 can be used simultaneously to handle two fuels 9 each, so that the fuel handling period is longer than that in the first embodiment. Can be reduced to almost 1/2.

Third Embodiment (First Embodiment of Third Embodiment) The fuel exchange apparatus of this embodiment is a television camera apparatus with a swing function having a telephoto function from the operation floor below the water surface of a multiwell reactor. Multiple units are inserted and installed, and a TV camera device with a swing function is loaded from the operation floor onto the upper end surface of the reactor pressure vessel and the upper end surface of the core shroud, and fixed using a shape memory alloy fixing device. By using the result of image processing, the operation of the transverse carriage, traveling carriage, and multi-stage telescopic mast is automatically and remotely controlled.

18 to 20 show a fuel exchange device according to this embodiment. FIG. 18 is a sectional view of the inside of the furnace showing the overall arrangement, and FIGS. 19 and 20 are enlarged views showing a television camera device. is there. As shown in FIG. 18, a TV camera device 85 with a swing function is installed on the upper end surface of the reactor pressure vessel 1 and the upper end surface of the core shroud 84.
The fuel 9 is handled in the reactor core 42 and the fuel storage pool 10 while being monitored by the TV camera device 85. As shown in FIGS. 19 and 20, each swinging television camera device 85 has a configuration in which the television camera 86 is housed in a housing case 87. Combined, the vertical orientation can be adjusted.

The television camera device 85 is supported on a turntable 89 that rotates about a vertical axis, and has a counterbalance 90 on the opposite side of the angle suppression drive mechanism 88. It is supported in a balanced state. The turntable 89 is supported on the upper end surface of the reactor pressure vessel 1 and the upper end surface of the core shroud 84 via a mounting member 91 made of a shape memory alloy. The shape memory alloy mounting member 91 has a characteristic that the tip portion opens when the temperature rises due to electric heating, and the tip portion closes in other temperature drop states. Upper end surface of reactor pressure vessel 1 and core shroud 8
It is removably installed on the upper end surface of No. 4. Reference numeral 92 is a suspension ring provided on the top of the television camera device 85.

When refueling, etc., the multistage telescopic mast 7
Before the work for handling the fuel 9 is carried out by the operator, a plurality of TV camera devices 85 are inserted from the operation floor 2 below the water surface of the reactor multi-stage well 11, and then, for example, a work carriage traveling on the operation floor 2, that is, Riding on the traveling carriage 4, the upper end surface of the reactor pressure vessel 1 and the core shroud 8
The TV camera device 85 is installed on the upper end surface of the No. 4 using a hanging string or the like.

With the TV camera device 85 having a swing function installed in this manner, the multistage telescopic mast 7 is used for fuel 9
The state of handling the fuel is photographed, and the position of the fuel 9 in the reactor well 14 is obtained by image processing. Reactor pressure vessel 1
In order to obtain an accurate position when the fuel 9 exists near the upper end of the core shroud 84 and near the upper end of the core shroud 84, the reference point of the fuel 9 is photographed by the TV camera device 85 with a swing function
Image processing is performed to find the position of the reference point.

Then, using the result obtained by using the television camera device 85 to find the position of the fuel 9 handled by the multistage telescopic mast 7, the traveling carriage 4 and the traverse carriage 6 travel and traverse, and the multistage telescopic movement. The fuel handling is optimized while controlling the elevation of the mast 7.

According to the first example of the third embodiment as described above, in addition to the effect obtained in the first example of the first embodiment, the information on the three-dimensional position and the movement of the fuel 9 being handled is obtained. Is used to control the traveling and traversing of the traveling carriage 4 and the transverse carriage 6, and the raising and lowering of the multi-stage telescopic mast 7, so that the operation for shortening the handling time of the fuel 9 can be performed, and in the work such as the periodic inspection. The fuel handling period can be shortened.

(Second Example of Third Embodiment) In this example, an air cylinder mechanism is used as means for mounting and fixing the upper end surface of the reactor pressure vessel and the upper end surface of the core shroud of the television camera device with a swing function. It is applied.

FIG. 21 is a side view showing an installed state of the television camera device 85 according to this embodiment, and FIG. 22 is a plan view of the same. As shown in these figures, in this embodiment,
A pair of claw bodies 93 that expand and contract as a holding member and an air cylinder mechanism 94 that drives the claw bodies 93 in the expansion and contraction direction are provided on the left and right below the rotary table 89 that supports the storage case 89. Has been. Since other configurations are substantially the same as those of the first embodiment, the same reference numerals as those in FIGS. 19 and 20 are attached to FIGS. 21 and 22 to end the description.

According to such a structure, when the television camera device 85 with a swing function is installed on the upper end surface of the reactor pressure vessel 1 and the upper end surface of the core shroud 84, the intervals between the claw bodies 93 are first set. They are arranged on the upper end surface of the reactor pressure vessel and the upper end surface of the core shroud 84 in a wide open state, and then high pressure air is supplied to the air cylinder mechanism 94 from above the operation floor 2. Thereby, the nail body 9
The reactor pressure vessel 1 and the core shroud 84 can be sandwiched by narrowing the interval of 3. In the case of removal, the interval between the claws 93 may be expanded by the action opposite to the above.

(Third Example of Third Embodiment) In this example, the fixing means of the TV camera apparatus with a swing function is loaded from the operation floor and seated, and then the upper end of the reactor pressure vessel and the core are set. It is a mechanism that is hooked and fixed on the upper end of the shroud.

FIG. 23 is a sectional view showing a state in which the television camera device 85 according to this embodiment is installed on the upper end of the reactor pressure vessel 1 and the upper end of the core shroud 84.

As shown in FIG. 23, in the present embodiment, the neck for swinging the TV camera 86 and rotating the TV camera 86 about its axis is rotated by a shaft 95 provided at an axially intermediate position of the TV camera 86. Swing drive device 96 and storage case 8
The rotation driving device 98 for rotating the shaft 97 provided at the rear of the shaft 7 is used. The rotation driving device 98 is connected to the mounting member 99, and the mounting member 99 has an elastic holding portion 100 configured by bending an elastic material.

In the television camera device 85 according to the present embodiment, the upper end of the mounting member 99 provided with the suspension ring 92 is pushed down, and the elastic pinching portion 100 is applied to the upper end of the reactor pressure vessel 1 and the upper end of the core shroud 84. It can be fixed in a one-touch type by holding it, and can be easily removed by pulling it up with a certain force or more.

(Fourth Embodiment of Third Embodiment) This embodiment is a superordinate means for swinging the television camera in a television camera device having a fixing means similar to the fixing means shown in FIG. A spherical motor using sound waves is used.

FIG. 24 is a sectional view showing a state in which the television camera device 85 with a swing function according to this embodiment is installed on the upper end of the reactor pressure vessel 1 and the upper end of the core shroud 84.

As shown in FIG. 25, in the present embodiment, the television camera 86 is housed in a housing case 87, and the housing case 87 has a mounting member 9 having an elastic holding portion 100.
9 is coupled via a spherical motor 101 utilizing ultrasonic waves.

This ultrasonic wave utilizing spherical motor 101 rotates the spherical portion by the driving force from the driving device 102,
As a result, the TV camera 86 can be swung or rotated.

According to the present embodiment, the use of the ultrasonic wave-using spherical motor 101 allows the rotation and the swinging motion to be carried out by supporting at one place.

(Fifth Example of Third Embodiment) In this example, a television camera device is provided so as to be movable along a spiral guide rail installed around the axis along the inner wall of the reactor pressure vessel. , The position of the TV camera is changed so that the fuel can be handled.

FIG. 25 shows a guide rail device 1 having a spiral guide rail 103 for moving the television camera device 85.
No. 04 is installed on the upper end of the core shroud 84, and the concept of performing fuel handling work is shown.

As shown in FIG. 25, in this embodiment,
For example, before handling the fuel 9 with the multi-stage telescopic mast 7,
An operator uses an overhead crane from the operation floor 2 to the reactor well 11 to make a spiral guide rail 1
03 is installed on the upper end of the core shroud 84. After the guide rail 103 is installed, the fuel handling work is started while monitoring with the television camera device 85.

According to this embodiment, the television camera device 85
Since the fuel can be exchanged while moving the reactor pressure vessel 1 in the circumferential direction and the vertical direction, the work can be performed more accurately and the efficiency can be improved.

(Sixth Embodiment of Third Embodiment) In this embodiment, in order to photograph the fuel suspended in the reactor well, a pole for mounting a television camera device is provided on the upper surface of the core shroud or the reactor pressure. It is installed on the top of the container to handle the fuel.

FIG. 26 shows the concept of installing a plurality of pole devices 105 for fixing the television camera device 85 on the upper end of the core shroud 84 and performing fuel handling work.

As shown in FIG. 26, in this embodiment,
Before the operation of handling the fuel 9 with the multi-stage telescopic mast 7, the operator uses the overhead crane or the work carriage (traveling carriage 4) from the operation floor 2 to the reactor well 11 to move the TV camera device 85. The pole 105 is installed on the upper end of the core shroud 84. After the installation of the pole 105, the fuel handling work is started while monitoring with the television camera device 85.

Also according to the present embodiment, the television camera device 8
Since the fuel can be exchanged while moving 5 up and down, the work can be performed accurately.

(Seventh Example of Third Embodiment) In this example, the illumination device for illuminating the photographing direction by the television camera device can be swung integrally with the television camera device.

FIG. 27 is a perspective view of the apparatus according to this embodiment.

As shown in FIG. 27, in this embodiment,
Storage case 1 for the TV camera 106 and the lighting device 107
08 and 109 are housed respectively, and a common body case 1
A television camera device 11 which is held in 10 and has a lighting device
1 is formed. And each storage case 108, 1
09 are coupled to each other,
Supported by, the declination is adjusted at the same time.

Behind the angle-reduction drive mechanism 112 is the first embodiment.
A counter balance 113 similar to the above is provided, and is supported by the turntable 114 so as to be simultaneously rotatable in a state of being balanced with each other. The rotary table 114 is connected to a mounting member 115 made of a shape memory alloy as in the case of the first embodiment. The mounting member 115 made of the shape memory alloy has its tip end opened when the temperature rises due to electric heating and narrows when the temperature falls. It is designed to be sandwiched between the upper end of the reactor pressure vessel 1 or the upper end of the core shroud 84. The television camera 106 is provided with a telephoto function. Further, reference numeral 116 is a suspension ring.

In the case of refueling or the like, first, a plurality of television camera devices 111 with a lighting device are installed from above the operation floor 2 below the water surface of the reactor well 11. Then, it is fixed to the upper end surface of the reactor pressure vessel 1 and the upper end surface of the core shroud 84 using the shape memory alloy mounting member 115, the image obtained by the television camera 106 is image-processed, and the result is used to traverse the carriage. 6. Remotely and automatically control the operations of the traveling carriage 4, the multistage telescopic mast 7, and the like.

According to this embodiment, since the illumination device 107 and the television camera 106 are moved at the same time, the television camera 1
The object to be photographed at 06 can be seen clearly. Therefore, the tracking of the target object is good, and the reliability of control such as traveling of the traveling carriage 4, traverse of the traversing carriage, and raising and lowering of the multi-stage telescopic mast 7 can be improved, and as a result, fuel handling in operations such as periodic inspections is performed. The period can be shortened.

(Eighth Example of Third Embodiment) In this example, a television camera device substantially similar to that of the fourth example of the third embodiment is covered with a hemispherical dome. .

FIG. 28 is a sectional view showing the structure of this embodiment.

As shown in FIG. 28, in the television camera device 85 of this embodiment, the television camera 117 is housed in a housing case 118, and the housing case 118 is connected to an ultrasonic wave utilizing spherical motor 119.

The ultrasonic wave utilizing spherical motor 119 is driven by a driving device (not shown). And
Ultrasonic Spherical Motor 119 and Flat Mounting Member 1
21.

In this structure, the storage case 118, the ultrasonic wave utilizing spherical surface 119, the driving device and the like are watertightly covered with a transparent hemispherical dome 122 fixed to a mounting member 121. Reference numeral 123 is a suspension ring.

According to the structure of the eighth embodiment, it is of course possible to mount it on the upper end of the reactor pressure vessel 1 and the upper end of the core shroud 84 in a sandwiched state and use it in the same manner as described above. Since it is not necessary to make the water resistance of the acoustic wave utilizing spherical motor 119 or the like a problem, the structure of the ultrasonic wave utilizing spherical motor 119 or the like can be simplified.

(Other Examples of Third Embodiment) In this embodiment, various modifications can be made in addition to the above examples.

For example, in the fifth embodiment described above, the structure in which the high-frequency cable is built is attached to the spiral guide rail for moving the underwater camera, and the underwater camera device running on the spiral guide rail is also compatible with this. It is possible to adopt a configuration in which a coil structure is installed.

In such a structure, electric power, control signals, video signals and the like can be communicated with the underwater camera device without contact with the high frequency cable built in the spiral guide rail.

Similarly, in the above-described sixth embodiment, a structure incorporating a high-frequency cable is attached to a pole for mounting a television camera device, and the underwater camera device attached to the pole is also associated with the coil structure. May be installed.

Further, the above-mentioned respective embodiments may be combined appropriately.

Fourth Embodiment (First Embodiment of Fourth Embodiment) In this embodiment, a pipe with a multi-stage hole in a row is inserted near the water surface in the reactor well above the reactor pressure vessel. Then, a water flow was jetted from the multiple holes arranged in a row above the reactor pressure vessel so that a swirl flow could be generated, and the opening of the suction pipe was used as fuel for the water surface in the reactor well near the center of the swirl flow. It is designed to handle fuel while being installed so that it does not get in the way.

FIG. 29 is a perspective view showing how the fuel 9 is handled while generating the swirling flow 124 inside the reactor well 11.

On the upper surface of the reactor pressure vessel 1 with the lid removed, a plurality of vertically elongated pipes 126 having a plurality of holes 125 arranged in a row are installed in the reactor well 11. The direction in which the multi-stage holes 125 are opened in one row is such that the flow ejected from the holes 125 becomes the swirling flow 124.

Each pipe 126 is connected to a pump 127 on the operation floor 2 via a hose 128, so that the reactor water pumped from the reactor well 11 by the robot described below can be ejected from the pipe 126. There is.

That is, a robot 129 for sucking water is floated on the water surface in the reactor well 11. A propulsion unit (not shown) is attached to the robot 129,
It is possible to move the water surface. And the robot 129
Is connected to the suction device 130 via a hose 131, and the suction device 130 is connected to the pump 127 via a filter device (not shown).

The suctioned reactor water is purified by the filter device and returned to the reactor well 11 through the pipe 126. In this way, the swirl flow generating device 131 is configured. Others are substantially the same as in the first embodiment,
29 are denoted by the same reference numerals as in FIG. 1, and description thereof will be omitted.

In this example described above, substantially the same operation as in the first embodiment is performed, but the following points are added.
That is, before the work of handling the fuel 9 with the multi-stage telescopic mast 7 of the first embodiment, the operator turns from the operation floor 2 to the reactor well 11 by using an overhead crane, a work carriage, a traveling carriage 4, etc. The flow generator 131 is installed in the portion of the reactor pressure vessel 1 where the lid is removed, the pump 127 is driven to generate the swirling flow 124 in the reactor well 11, and the robot 129 floating on the water surface sucks and cleans the reactor water. I do. When the above work is completed, the fuel handling work described in the first embodiment is started.

According to the first example of the fourth embodiment described above, the same operational effects as those of the first embodiment are obtained, and further, in connection with fuel handling, the swirling flow 124 from the pipe 126 is obtained. And suction from the robot 129,
Due to the cleaning effect, the radioactive substances released from the liquid surface to the operation floor 2 can be removed, the dose on the operation floor 2 can be prevented from increasing, and the exposure dose to the worker can be reduced more reliably. it can.

(Second Example of Fourth Embodiment) This example is a more specific version of the first example.

That is, in the swirling flow Hase apparatus 131 of this embodiment, as shown in FIG. 30, each pipe 126 is connected by a reinforcing wire or a rib 132 and the reactor well 1
The communication is made in the communication pipe 133 within 1. The pump 127 and the suction device 130 are fixedly installed at predetermined positions on the operation floor 2.

In the present embodiment as well, the reactor water sucked from the robot 120 is purified by the filter device and returned to the reactor well 11 via the pump 127 again. A purification system for generating a swirling flow may be separately provided.

According to this embodiment, the same effect as that of the first embodiment can be obtained, but the structure is further embodied and reinforced,
This is a practically preferable configuration.

(Third Example of Fourth Embodiment) FIG.
The structure of the present embodiment is shown. This embodiment is different from the fourth embodiment in that the pipe 134 of the swirl flow generator 131 is attached to the inner wall of the reactor well 11 and the swirl flow generator can be deployed at the time of use.

That is, in this embodiment, the pipe 134 is bent in a substantially U-shape, and protrudes from the vertical support pipe 134 toward the inside of the reactor well 11. Since other configurations are the same as those of the above-described respective embodiments, the corresponding portions in the figure are denoted by the same reference numerals as those in FIG.

According to the structure of this embodiment, the device can be attached more easily and surely.

(Fourth Example of Fourth Embodiment) FIG. 32 shows the configuration of this example. In the present embodiment, as shown in FIG. 32, a temperature stratification device 135 is provided on one wall of the reactor well 11 and the fuel storage pool 10 above the reactor pressure vessel 1 and faces the facing wall near the water surface. All the water is blown out, and the water is sucked in through the suction port provided on the opposite wall.

Then, depending on the temperature of the blown water, the core 4
Set so that the water surface is higher than the 2 outlet temperature,
The sucked water is guided to a water blowing pump 138 via a filter 136 and a heater 137, and is blown to the reactor well 11 and the fuel storage pool 10.

That is, on one surface of the walls of the reactor well 11 and the fuel storage pool 10 below the water surface, a water outlet 139 is provided.
An annular thermal stratification device 135 composed of open pipes is installed, another thermal stratification device is installed on the wall surface facing the same, and the reactor water sucked by the another thermal stratification device is filtered 136. The liquid is blown from the temperature stratification device 135 through the heater 137 to the liquid surface of the reactor well 11 and the liquid surface of the fuel storage pool 10 by the temperature stratification apparatus 135.

According to such a configuration, before the reactor pressure vessel 1 is opened, water having a temperature higher than the core core outlet temperature is leveled on the water surface of the reactor well 11 and the water surface of the fuel storage pool 10 than the temperature stratification device 139. It is blown out in layers in the direction. Then, the reactor water having a stratified temperature is sucked from the temperature stratification apparatus on the opposite side. The suctioned reactor water is purified by the filter 136, then heated by the heater 137, pressurized by the pump 138, and again the temperature stratification apparatus 1
It is blown from 35 to the water surface of the reactor well 11 and the water surface of the fuel storage pool 10.

This flow is also carried out during the fuel handling period and during the reactor operation. Radioactive material riding on natural convection under high temperature laminar flow is trapped under this laminar flow, and partially activated flow is sucked out and filtered. Also, since the water flowing near the liquid surface is not activated, the activated substance evaporates and the operation floor 2
Is prevented from spreading.

Therefore, according to the present embodiment, it is possible to prevent the diffusion of the pollution to the operation floor, and it is possible to greatly reduce the exposure of the worker.

The pump 138 may be installed in front of the filter 136 or the heater 137. Further, the reactor water suction device may be a plurality of units . Fifth embodiment (first embodiment of the fifth embodiment) FIG. 34 shows the configuration of the present embodiment, in which the jet device 140 is used as the core shroud. 8
It is installed at the upper end of No. 4 and is used for fuel handling work. Guide rail 14 provided in jet device 140
1 has a structure in which the articulated arm 142 can move.
Although not shown, a nozzle for jetting a jet and a television camera are attached to the tip of 42.

In the structure of such an embodiment, before the work of handling the fuel 9 by the multistage telescopic mast 7, the worker
Using the overhead crane from the operation floor 2 to the reactor well 11, install the jet device 140 into the core shroud 84.
Install at the top of the. Then, the fuel handling work is started.

The fuel 9 transferred from the fuel storage pool 10 in order to load the fuel at a predetermined position in the core 42.
Moves three-dimensionally above the core 42. At that time, the movement of the fuel 9 tends to be delayed with respect to the movements of the traveling carriage 4 and the transverse carriage 6.

In order to recover this delay, a water jet is applied to the fuel 9 above the region of the reactor core 42 by a nozzle attached to the articulated arm 142 moving on the guide rail 141 of the jet device 140, and the fuel 9 is ejected. It actively compensates for delays in movement in water.

According to this embodiment, it is possible to actively prevent shaking during the transportation of the fuel 9, so that the waiting time for shaking can be reduced or eliminated, and the periodic inspection period can be further shortened. it can.

(Second Example of Fifth Embodiment) FIG. 34 shows the configuration of this example. In this embodiment, the injection flow device 140 is installed at the inner wall of the reactor well 11 and the inner wall of the fuel storage pool 10 or in the vicinity thereof.

For example, as shown in FIG. 34, a hose 143
Is suspended from the driving device 144, and the jet device 140 is attached to the hose 143.

According to such a configuration, the jet device 140
Is attached to the inner wall of the reactor well 11 and the inner wall of the fuel storage pool 10 to prevent operation delay when the fuel 9 is moved up and moved, and the work time can be shortened accordingly.

[0205]

As described in detail above, according to the fuel exchange apparatus of the present invention, the traveling carriage and the transverse carriage are levitated on the rails to promote smooth and quick movements,
It has an excellent effect that the fuel can be handled at high speed and efficiency, and the vibration isolation function at the time of an earthquake can be added to improve the safety of the light water cooling reactor.

In addition, the operability of the telescopic suspension mechanism is enhanced to improve the fuel handling speed and prevent the interference of a plurality of trucks, thereby significantly improving the work efficiency, and also forming a barrier using the laser beam and the telescopic portion. And the use of a camera device, it is possible to perform the complex behavior in the reactor internal space more safely and quickly.

[Brief description of the drawings]

FIG. 1 is an overall view showing a first example of the first embodiment of the present invention.

FIG. 2 is an enlarged view showing a main part of the embodiment.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a view taken in the direction of arrows AA in FIG. 3;

FIG. 5 is a diagram showing a second example of the first embodiment of the present invention.

FIG. 6 is a diagram showing a third example of the first embodiment of the present invention.

FIG. 7 is a diagram showing a fourth example of the first embodiment of the present invention.

FIG. 8 is a diagram showing a fifth example of the first embodiment of the present invention.

FIG. 9 is a diagram showing a sixth example of the first exemplary embodiment of the present invention.

FIG. 10 is a diagram showing a seventh example of the first exemplary embodiment of the present invention.

FIG. 11 is a diagram showing an eighth example of the first exemplary embodiment of the present invention.

FIG. 12 is a diagram showing a ninth example of the first exemplary embodiment of the present invention.

FIG. 13 is a plan view showing a second embodiment of the present invention.

FIG. 14 is a view taken along the line BB of FIG.

FIG. 15 shows the operation of the second embodiment of the present invention,
The top view of a core part.

16 is an enlarged view showing a part of FIG.

FIG. 17 is a diagram showing a state in which fuel is extracted in a staggered manner from the state of FIG.

FIG. 18 is a diagram showing a first example of the third embodiment of the present invention.

FIG. 19 is a side sectional view of the television camera device shown in FIG.

20 is a front view of the television camera device shown in FIG.

FIG. 21 is a side sectional view showing a second example of the third embodiment of the present invention.

FIG. 22 is a plan view of FIG. 21;

FIG. 23 is a side sectional view showing a third example of the third embodiment of the present invention.

FIG. 24 is a side sectional view showing a fourth example of the third embodiment of the present invention.

FIG. 25 is a diagram showing a fifth example of the third embodiment of the present invention.

FIG. 26 is a diagram showing a sixth example of the third exemplary embodiment of the present invention.

FIG. 27 is a front view showing a seventh example of the third embodiment of the present invention.

FIG. 28 is a side sectional view showing an eighth example of the third embodiment of the present invention.

FIG. 29 is a diagram showing a first example of the fourth embodiment of the present invention.

FIG. 30 is a diagram showing a second example of the fourth embodiment of the present invention.

FIG. 31 is a diagram showing a third example of the fourth embodiment of the present invention.

FIG. 32 is a view showing a fourth example of the fourth embodiment of the present invention.

FIG. 33 is a diagram showing a first example of the fifth embodiment of the present invention.

FIG. 34 is a diagram showing a second example of the fifth embodiment of the present invention.

[Explanation of symbols]

 1 Reactor Pressure Vessel 2 Operation Floor 3 Guide Rail 4 Traveling Cart 5 Monorail 6 Traverse Cart 7 Multi-stage Telescopic Mast 8 Fuel Grip Mechanism 9 Fuel 10 Fuel Storage Pool 11 Reactor Well 12, 13 Floating Means 14 Outer Guide Rail 15 Inner Guide Rail 16 Large-span traveling cart 17 Small-span traveling cart 18, 19 Structure 20 Air skirt 21 Air compressor 22 Wire drive device 23 Pulley 24 Wire 25 Large-span monorail 26 Small-span monorail 27, 28 Structure 29 Bogie section 30 Transverse section 31 Air skirt 32 Air compressor 33 Wire drive 34 Pulley 35 Wire 36 Mast expansion drive 37 Tower 38 Constant pulley 39 Wire 40 Slide mechanism 41 Drive mechanism 42 Reactor core 43 Canal 44 Rack 45, 46 slide Structure 47 Drive mechanism 48 Rotation mechanism 49 Support point 50 Intermediate arm 51 Support point 52 Support point pin 53 Wire 54 Hanging wire 55 Wire drive device 56 Wire 57 Transverse laser light transmitter / receiver 58 Traveling direction laser light transmitter / receiver 59, 60, 61, 62 Laser light 63 Blue laser light 64 Blue laser oscillator 65 Position detection device 66 Air compressor 67 Air hose 68,69 Air hose winding device 70 Traverse drive device 71 Travel drive device 72 Lower end 73 Horizontal plane rotation mechanism 74 Wire 75 Rotation mechanism 75a Rotating shaft 76 Rotating plate 77 Screw rod 78 Drive part 79 Set gear 80 Nut part 81 Suspending member 82 Upper lattice plate 83 Blank part 84 Core shroud 85 Television camera device 86 Television camera 87 Storage case 88 Depression drive mechanism 89 Rotating table 90 coun -Balance 91 Pointing member 92 Suspension ring 93 Claw body 94 Air cylinder mechanism 95 Shaft 96 Swing drive device 97 Shaft 98 Rotation drive device 99 Mounting member 100 Elastic gripping part 101 Spherical motor 102 Drive device 103 Guide rail 104 Guide rail device 105 Pole 106 TV camera 107 Lighting device 108, 109 Storage case 110 Main body case 111 TV camera device with lighting device 112 Depression drive mechanism 113 Counterbalance 114 Rotating table 115 Mounting member 116 Suspension ring 117 TV camera 118 Storage case 119 Use of ultrasonic waves Spherical motor 120 Elastic clamping portion 121 Mounting member 122 Hemispherical dome 123 Suspension ring 124 Swirling flow 125 Hole 126 Pipe 127 Pump 128 Hose 129 Robot 130 Suction Location 131 swirling flow generator 132 reinforcing wires or ribs 133 connecting pipe 134 supporting pipe 135 thermally stratified forming apparatus 136 strainer 137 heater 138 pump 139 outlet 140 jet device 141 guide rail 142 articulated arm 143 Hose

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koshiro Igarashi 8 Shinsita-cho, Isogo-ku, Yokohama-shi, Kanagawa Stock company inside Toshiba Yokohama Works (72) Inventor Yasuhiro Yuguchi 8 Shinsita-cho, Isogo-ku, Yokohama, Kanagawa Company Toshiba Yokohama Office

Claims (38)

[Claims] 1. A traveling carriage that is provided on the operation floor above the reactor pressure vessel so as to be able to travel horizontally via a guide rail, and a traveling carriage mounted on the traveling carriage via a monorail and a traveling direction of the traveling carriage. A transverse carriage that can traverse in a direction orthogonal to each other, a telescopic suspension mechanism that is provided below the transverse carriage so as to be telescopic, and a fuel gripping mechanism that is provided at the lower end of the telescopic suspension mechanism, A fuel exchange device for moving fuel through a reactor well between a reactor pressure vessel and a fuel storage pool by relative operation of a traveling carriage, a traverse carriage, a telescopic suspension mechanism, and a fuel gripping mechanism, A fuel exchange device, characterized in that a traveling carriage or a transverse carriage is supported by a levitation means so as to be able to float on a guide rail or monorail in a non-contact state. 2. The refueling device according to claim 1, wherein
The levitation means of the traveling carriage is an air levitation means attached to the lower surface of the traveling carriage, and the air levitation means enables the traveling carriage to move along a guide rail laid on the operation floor in a state of being levitated. A fuel exchange device characterized by the above. 3. The fuel exchange apparatus according to claim 1,
The traveling vehicle is provided with a driving means including a high-frequency cable attached to a guide rail laid on the operation floor and a coil structure attached to the traveling vehicle corresponding to the high-frequency cable, and the driving means drives the traveling vehicle. A fuel exchange device, which is movable along the guide rail. 4. The fuel exchange apparatus according to claim 1,
The levitation means of the transverse carriage is an air levitation means attached to the lower surface of the transverse carriage, and the air levitation means allows the transverse carriage to move along the monorail while being levitated. apparatus. 5. The fuel exchange apparatus according to claim 1,
The transverse carriage is equipped with a high-frequency cable attached to a monorail provided on the traveling carriage, and a drive means composed of a coil structure attached to the transverse carriage corresponding to the high-frequency cable. The drive means drives the transverse carriage. A fuel exchange device, wherein the fuel exchange device is movable along the monorail. 6. The fuel exchange apparatus according to any one of claims 1 to 5, wherein a plurality of left and right sides are provided along the same rail axis along the direction connecting the reactor pressure vessel and the fuel storage pool on the operation floor. A plurality of sets of guide rails in which the rail elements of the above are aligned in parallel are laid, and a plurality of traveling carriages are mounted in correspondence with the respective sets of guide rails. 7. The fuel exchange apparatus according to any one of claims 1 to 6, wherein the traveling carriage is a wire drive device disposed at an end position of a guide rail on the operation floor, and the wire drive device. And a wire connected between the traveling vehicle and the traveling vehicle to drive the traveling along the guide rail. 8. The fuel exchange apparatus according to any one of claims 1 to 7, wherein the traverse carriage is a wire drive device arranged at an end position of the traveling carriage, the wire drive device and the traverse carriage. With the wire connected between
A refueling device characterized by being driven along a monorail. 9. The fuel exchange apparatus according to claim 1, wherein the telescopic suspension mechanism includes a telescopic mast that telescopically expands and contracts, and a mast drive mechanism for driving the mast to expand and contract. A fuel exchange device having a configuration including: 10. The traversing vehicle according to claim 9, wherein the multistage telescopic mast and a mast drive mechanism for driving the mast are arranged in equilibrium in the guide rail track direction with the monorail as a fulcrum. A refueling device that is provided. 11. The fuel exchange apparatus according to claim 6, wherein the multistage telescopic mast and the mast drive mechanism are moved in the rail axis direction of the guide rail via a slide mechanism on the traverse carriage. A refueling device characterized by being provided so as to be possible. 12. The fuel exchange apparatus according to claim 11, wherein the slide mechanism is rotatable on a vertical axis by a rotating mechanism. 13. The fuel exchange apparatus according to claim 9, wherein the multistage telescopic mast has a truss column structure having a triangular cross section. 14. A fuel exchange device, characterized in that, instead of the multi-stage telescopic mast according to claim 9, the telescopic suspension mechanism is constituted by a wire and a wire drive device for driving the wire. 15. The fuel exchange apparatus according to claim 2 or 4, wherein the air source of the air levitation means is an air compressor provided on the operation floor or a high-pressure air source provided in the reactor auxiliary equipment, and the traveling carriage is used. Or an air hose for supplying high-pressure air to the floating air supply part of the traverse truck,
And a fuel exchange device, wherein an air hose for winding and unwinding the air hose is provided on the traveling carriage or the traverse carriage. 16. A fuel exchange, characterized in that, instead of the wire and the wire drive device according to claim 7 or 8, a traveling drive device or a traverse drive device capable of outputting a driving force is provided to the traveling carriage or the traverse carriage itself. apparatus. 17. The fuel exchange apparatus according to any one of claims 6 to 16, wherein each transverse carriage detects a relative position with respect to another transverse carriage to detect a distance between the transverse carriages in the transverse direction or the traveling direction. A fuel exchange device comprising a barrier forming means for forming a laser light barrier for preventing interference. 18. The fuel exchange apparatus according to any one of claims 1 to 17, further comprising a laser-type position detecting means for measuring a telescopic position of the telescopic suspension mechanism using laser light. Refueling device. 19. A traveling carriage provided on the operation floor above the reactor pressure vessel so as to be horizontally movable via a guide rail, and mounted on the traveling carriage via a monorail, and the traveling direction of the traveling carriage. A traverse cart that can traverse in a direction orthogonal to, a telescopic suspension mechanism that is provided to extend and contract below the traverse vehicle, and a fuel gripping mechanism that is provided at the lower end of the telescopic suspension mechanism, A fuel exchange device for moving fuel through a reactor well between a reactor pressure vessel and a fuel storage pool by relative operation of these traveling carriage, traverse carriage, telescopic suspension mechanism and fuel gripping mechanism, The fuel gripping mechanism includes a plurality of fuel gripping members having variable lateral intervals facing each other in a lateral direction at a lower end portion of the telescopic suspension mechanism. 20. The fuel exchange apparatus according to any one of claims 1 to 18, comprising the fuel gripping member according to claim 19. 21. The fuel exchange apparatus according to claim 19 or 20, wherein each fuel gripping member is rotatable about a vertical axis. 22. The fuel exchange apparatus according to any one of claims 1 to 21, further comprising remote operation means for remotely moving the fuel, the remote operation means being provided on an operation floor from a reactor. A fuel exchange device, which is detachably inserted and installed below a well and has a camera device with a telephoto function and a swing function for monitoring a traveling carriage, a traverse carriage, a telescopic suspension means, and a fuel gripping mechanism. 23. The fuel exchange device according to claim 22, wherein a fixing member for fixing the camera device to the core shroud and other internal reactor structures is made of a shape memory alloy. . 24. The fuel exchange apparatus according to claim 22, wherein a fixing member for fixing the camera device to the core shroud and other internal reactor structures is constituted by an air cylinder. 25. The refueling device according to claim 22, wherein the fixing member for fixing the camera device to the core shroud and other internal reactor structures has an elastic holding portion or a hooking portion. Characteristic refueling device. 26. The refueling device according to claim 22, wherein the camera device is provided so as to be movable along a spiral guide rail installed around a vertical axis along an inner wall of the reactor pressure vessel. Refueling device. 27. The fuel exchange apparatus according to claim 22, wherein the swing mechanism of the camera device is a spherical ultrasonic motor. 28. The refueling device according to claim 22, wherein the camera device is housed in a transparent, watertight dome having a substantially hemispherical shape. 29. The fuel exchange apparatus according to any one of claims 22 to 25, wherein a plurality of poles extending from the operation floor to the reactor internals in the reactor pressure vessel are installed, and each of these poles is installed. A refueling device having a camera device attached. 30. The refueling device according to claim 22, wherein an illuminating device for illuminating a photographing direction of the camera device is provided so as to be swingable integrally with the camera device. Refueling device. 31. The fuel exchange apparatus according to any one of claims 1 to 30, wherein a perforated pipe apparatus having a multi-stage opening in a row is inserted near the reactor well wall surface above the reactor pressure vessel, A suction pipe for jetting water is ejected from each of the holes so as to generate a swirl flow above the reactor pressure vessel, and a suction pipe for sucking water is installed in the water surface portion of the reactor well located substantially at the center of the swirl flow. Characteristic refueling device. 32. The fuel exchange apparatus according to claim 31, wherein a float member having a function of sucking water is connected to the tip of the suction pipe, and the float member is placed at the water surface of the reactor well located substantially at the center of the swirling flow. A fuel exchange device characterized by being floated on a part. 33. The fuel exchange apparatus according to claim 31 or 32, wherein the perforated pipe apparatus is configured to be deployable from the inner wall portion of the reactor well. 34. The fuel exchange apparatus according to claim 31, wherein the perforated pipe apparatus is replaced with a reactor well or a peripheral wall near the water surface extending between the reactor well and the fuel storage pool, A temperature stratification device comprising an annular pipe provided with a water outlet is provided, while a water inlet and a heater for heating water sucked from the water inlet and a filter for filtering are provided on the peripheral wall. And a pump for supplying the water discharged from the filter to the temperature stratification device. 35. The fuel exchange apparatus according to any one of claims 1 to 34, further comprising a water injection device for injecting water into fuel suspended inside or below a reactor well or in a fuel storage pool. A fuel exchange device characterized by the above. 36. The fuel exchange apparatus according to claim 35, wherein a plurality of water injection devices are installed on a core shroud in a reactor pressure vessel or a fuel storage rack in a fuel storage pool. Exchange device. 37. The fuel exchange apparatus according to claim 31, wherein a plurality of water injection apparatuses are installed on the wall of the reactor well or the wall of the fuel storage pool so as to be swingable. 38. The fuel exchange apparatus according to any one of claims 1 to 37, wherein a plurality of rails for guiding a transverse carriage are provided in place of the monorail on which the transverse carriage is mounted.