JP3405866B2 - Remote maintenance equipment for in-core equipment of fusion reactors - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is related to a remote maintenance apparatus of a nuclear fusion reactor furnace equipment for the furnace equipment housed in a fusion reactor through the maintenance ports is carried out in a fusion reactor
To do .

[0002]

2. Description of the Related Art For example, a remote maintenance device is used for maintenance of in-reactor equipment installed inside a torus-shaped hollow structure such as a tokamak-type nuclear fusion device as a nuclear fusion reactor. This remote maintenance device is used to move heavy in-core equipment to and from a maintenance port and fix it to a structure inside a fusion reactor.

Generally, the in-reactor of a nuclear fusion reactor which carries out a DT reaction directly faces a high temperature plasma and is directly subjected to a high energy particle load. Therefore, maintenance work such as periodical replacement is required. Has been done. Also, since the fusion reactor after operation is activated, all maintenance work for the equipment inside the reactor must be performed by remote maintenance equipment.

FIG. 10 is a vertical cross section of an example of a tokamak fusion reactor. The tokamak fusion reactor has a hollow donut-shaped container 12 having an outer diameter of a torus-shaped space 11 of about 12 m and a height of about 12 m, and the entire container 12 has a shield (not shown) having a thickness of several meters. It is stored in ().
The diverter 13 for discharging impurities generated during the operation of the fusion reactor among the large in-core equipment to be replaced is arranged radially at the lower end of the torus-shaped space 11 and fixed. The length of each torus-shaped space 11 is about 5 m, the width is about 0.5 m on the inner diameter side, about 1 m on the outer diameter side, and the height is about 2 m in the circumferential direction. It weighs about 24 tons. The arc-shaped guide mechanism 32 provided on the installation surface of the equipment in the furnace is
This is for mounting in-reactor equipment (diverter 13) in the nuclear fusion reactor and moving it in the circumferential direction.

The blanket 14 is a diverter 1
3 is configured to cover the entire inner surface of the torus-shaped space 11 except the lower part thereof. Further, around the torus-shaped space 11, the toroidal magnetic field coil 15 and the poloidal magnetic field coils 16a to 16f are annularly arranged around the central axis c of the torus in a complicated manner. Therefore, in order to replace the in-furnace equipment such as the diverter 13 and the blanket 14, the central port 1 which is a maintenance port radially provided around the torus-shaped space 11 so as to avoid the equipment around them.
7 or lower port 18 must be used. In this case, the cooling pipe 33 is cut and the equipment in the furnace is replaced from the maintenance port.

Particularly, in the tokamak fusion device,
As a remote maintenance device with excellent work efficiency and reliability,
Japanese Unexamined Patent Publication No. 4-212091 and Japanese Unexamined Patent Publication No. 6-328
There is one disclosed in Japanese Patent No. 373. Examples thereof are shown in FIGS. 11 and 12. In FIG. 11, this remote maintenance device is housed in an outer container 19 connected to a plurality of maintenance ports 17 extending in the radial direction from the internal torus-shaped space 11. Now, the remote maintenance device arranged inside the outer container 19 connected to the maintenance port 17a will be described.

The remote maintenance device is formed by a plurality of arcuate links 20 rotatably connected to each other, and a track 21 extending in a continuous semicircular shape in the torus-shaped space 11.
And a vehicle 23 that moves along this track 21 and is equipped with a telescopic manipulator 22 that handles in-core equipment,
A track storage means 24 arranged in the outer container 19 for storing the track 21, and a track 2 stored in the track storage means 24.
One arc-shaped link 20 for each maintenance port 1
Orbital expansion means 25 for sequentially feeding the 7a into the torus-shaped space 11 along the circumferential direction, extending the track 21 concentrically with the torus-shaped space 11, and supporting the arcuate link 20 at the rearmost end of the track 21. And another maintenance port 17b adjacent to the maintenance port 17a.
And a track support device 26 for supporting an intermediate portion of a track 21 inserted into the torus-shaped space 11 and extending from the track.

In the vehicle 23, as shown in FIG.
A pinion gear that meshes with a sector gear 27 provided on the inner peripheral surface of the raceway 21 and moves along the raceway 21;
A fixing ring 29 fixed to the vehicle 23 with an opening for preventing the drive mechanism 28 from interfering with the track support device 26 when moving on the track 21, and in the circumferential direction of the fixing ring 29. A movable ring 30 that is movably mounted along the movable ring 30 and has an opening similar to the fixed ring 29, and a drive device 31 that moves the movable ring 30 with respect to the fixed ring 29 are provided.

The telescopic manipulator 22 is a telescope type manipulator having an end effector (not shown) at its tip, and is connected to the movable ring 30 to rotate around the track 21. About 6
It is possible to extend up to the length of m and access the in-core equipment at the bottom of the fusion reactor. This remote maintenance device
By the operations of the telescopic manipulator 22 and the vehicle 23, the maintenance work of the in-core equipment in the entire furnace is performed. The equipment in the furnace is replaced using the space below the track support device 26 in the central port 17.

As shown in FIG. 10, since the diverter 13 which is a device in the furnace is longer and larger than the radial interval of the lower end of the blanket 14, it cannot be pulled up and replaced from the port 17 at the center. Therefore, the replacement of the diverter 13 is performed using the lower port 18. Here, the procedure for removing the diverter 13 will be described below.

FIG. 13 shows a top view of the diverter 13 which is the in-furnace equipment arranged radially.
First, the shield (not shown) installed in the lower port 18 is removed to open the lower port 18, and the cooling pipe 33 (not shown) of the moving diverter 13 is cut. Then, the diverter 13a in front of the lower port 18 is pulled out in the radial direction. Next adjacent diverter 1
13b is moved in the circumferential direction to the position in front of the lower port 18 as indicated by the arrow in FIG. 13, and then similarly pulled out in the radial direction. By repeating this operation, the diverter 13 is sequentially removed from the lower port 18 to the outside of the furnace. The new diverter 13 is installed in the reverse order of this procedure.

[0012]

However, since the frictional force when moving the heavy diverter 13 is large, a large driving force is required in the circumferential direction. When it is attempted to generate this driving force with the telescope type manipulator 22 as described above, a large lateral load is applied to the tip of the telescope type manipulator 22 extending vertically downward to a length of about 6 m, and at the same time, the manipulator 22. A large moment will be applied to the base of. Orbit 21
It is mechanically difficult to load such a large load with a manipulator 22 mounted on a vehicle 23 (not shown) inserted into the fusion reactor through a narrow central port 17 (not shown). Very difficult.

Even if a device for generating a driving force in the circumferential direction is constructed by using the space after removing the diverter 13, the space in the circumferential direction and the space in the radial direction are limited, which is not easy. Especially on the front of the maintenance port
With only one diverter 13 removed, there is only one space for the diverter 13, so if this space is used, the diverter 13 cannot be moved to that space. . In addition, the reaction force of the driving force acts as a tipping force on the device that generates the driving force. The problem is that it must be configured with.

Therefore, a remote maintenance device capable of solving such a problem was proposed by the same applicant (Japanese Patent Application No. 7-1873).
No. 37) is proposed. This remote maintenance device
Extend the moving arm in the horizontal direction to grip a part of the target device, move the target device by applying a lateral driving force, and contact the step or protrusion provided on the floor to move the target device in the horizontal direction. The manipulator is used at the tip of the balance arm that supports the reaction force of the drive force of the The target device is moved in a stable manner by balancing the overturning force generated in.

Further, this remote maintenance device is constructed so that the length along the moving direction is less than half of the moving target device, and is inserted into the space after one of the moving target devices is removed using a manipulator. By pulling the adjacent moving target device by a moving arm by about a half width, inserting it again into the newly generated space by using the manipulator, and pushing out the remaining approximately half by the moving arm, By using a space in which only one of the adjacent moving target devices has been removed, the entire adjacent moving target device can be moved to that space.

In this remote maintenance device, the vehicle 2
The manipulator 22 installed at 3 applies a vertical load to balance the overturning force in the horizontal direction, or moves the remote maintenance device to the vicinity of the diverter 13. The manipulator 22 is a diverter. Since it is also suitable for exchanging in-furnace equipment such as blankets 14 other than 13, when many blankets 14 must be exchanged, the work on the manipulator 22 increases.

After moving the diverter 13 to be replaced to the position in front of the maintenance port in the circumferential direction of the fusion reactor, the moving direction must be changed to the radial direction to pass through the maintenance port. As a means to change the moving direction to a right angle, it is considered necessary to use a caster structure roller or a rail that intersects at a right angle, but the caster structure roller has a path that draws an arc or meanders when bending. Therefore, it is not suitable for the case where it is necessary to move accurately in a limited space such as in-core equipment of a fusion reactor. In addition, the rail must have the function of restraining the movement of the rail in the width direction in order to prevent derailment, but the rail intersecting at a right angle easily interferes with the portion that restrains the movement in the width direction. Very difficult to do. As described above, it is not easy to accurately move a heavy in-core device and bend the moving direction at a right angle.

On the other hand, in order to move the diverter 13 in the circumferential direction, an arcuate guide mechanism 32 is installed in the fusion reactor in the circumferential direction, and the diverter 13 has an arcuate guide mechanism 32 at a predetermined position. The structure is fixed to the structure of the fusion reactor.

During operation of the fusion reactor or when a phenomenon called disruption in which plasma is rapidly extinguished,
Approximately 2 vertically downwards per diverter 13.
00 tons, about 40 tons upward, about 15 inward in the radial direction
It is said that an electromagnetic force of 0 ton, about 30 ton outward, and 10 ton in the circumferential direction act, and the diverter 13 must be firmly fixed.

However, since the diverter 13 becomes hotter than the vessel 12 of the fusion reactor during operation, the diverter 13
It is expected that a large amount of thermal deformation will occur in the vessel 12 of the fusion reactor in the radial direction by about 8 mm. Therefore, if the diverter 13, which is the in-core device, is firmly fixed, excessive thermal stress may occur and the in-core device may be destroyed. There is a problem that it is difficult to fix.

As described above, there are many technical problems in moving or fixing the diverter 13 which is a heavy-weight in-furnace device in a limited space.

An object of the present invention is to provide a remote maintenance device for nuclear fusion reactor internal equipment, which can move a large-weight internal equipment accurately and smoothly, and can smoothly switch the moving direction in front of the maintenance port. That is .

[0023]

According to a first aspect of the present invention, there is provided a remote maintenance apparatus for in-core equipment of a fusion reactor, which carries out in-core equipment of a fusion reactor from or into the fusion reactor. Maintenance port, an arc-shaped guide mechanism provided on the installation surface of the reactor internal equipment in the fusion reactor for mounting the reactor internal equipment and moving it in the circumferential direction, and the reactor internal equipment located in front of the maintenance port When the trolley is not installed, the trolley is inserted at the position of the equipment inside the reactor, and when the trolley provided on the upper surface of the trolley is inserted into the fusion reactor, it is connected to the arc-shaped guide mechanism and the equipment inside the reactor is trolleyed. And a partial guide mechanism for moving and mounting.

Therefore, when the trolley is inserted into the position of the in-core equipment in front of the maintenance port, a partial guide mechanism continuous with the arc-shaped guide mechanism provided on the installation surface of the in-core equipment is formed on the trolley. Then, the diverter at a position other than the front of the maintenance port is transferred onto the carriage along the arcuate guide mechanism and the partial guide mechanism.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a remote maintenance device for equipment in a nuclear fusion reactor in which sector gears are provided on the circumferential surfaces of the arc guide mechanism and the partial guide mechanism in the same direction.

When the trolley is inserted into the position of the in-core equipment in front of the maintenance port, the sector gear provided on the installation surface of the in-core equipment is continuous with the partial gear provided on the trolley.

The invention of claim 3 is the invention of claim 1 or claim 2.
In the remote maintenance device for internal equipment of the fusion reactor, when the truck is inserted into the fusion reactor, the adjacent internal equipment is pulled along the arc-shaped guide mechanism and mounted on the partial guide mechanism of the truck. The truck is provided with a moving arm for moving in-core equipment preliminarily mounted on the partial guide mechanism of the truck in the circumferential direction along the arc-shaped guide mechanism.

When the dolly is inserted into the position of the in-core equipment in front of the maintenance port, the moving arm provided on the lower side of the dolly is inserted below the adjacent in-core equipment to move the adjacent diverter to a circle. It is pulled along the arc-shaped guide mechanism to be mounted on the partial guide mechanism on the dolly, or the in-core device preliminarily mounted on the dolly is moved in the circumferential direction along the partial guide mechanism and the arc-shaped guide mechanism.

The invention of claim 4 is the invention of claims 1 to 3.
In the remote maintenance device for internal equipment of the fusion reactor, the self-propelled bogie that freely and continuously moves between the partial guide mechanism and the arcuate guide mechanism is mounted on the bogie and inserted into the fusion reactor. It was done like this.

The self-propelled trolley is mounted on a trolley that is inserted into the position of the in-core device in front of the maintenance port, and is between the partial guide mechanism of the trolley and the arc-shaped guide mechanism provided on the installation surface of the in-core device. Freely move continuously.

According to a fifth aspect of the present invention, in the remote maintenance device for internal equipment of the fusion reactor according to the fourth aspect , the self-propelled carriage has an arc shape.
Sector gears provided in the guide mechanism and the partial guide mechanism
And a drive mechanism for driving the gear,
By driving the gears with the drive mechanism,
Freely continuous between minute guide mechanism and arc-shaped guide mechanism
It was made to move to.

The self-propelled trolley is mounted on a trolley that is inserted into the position of the in-core equipment in front of the maintenance port, and has a gear that meshes with a sector gear that is continuously formed between the trolley and the installation surface of the in-core equipment. By rotationally driving, it freely and continuously moves between the top of the trolley and the installation surface of the equipment in the furnace.

The invention of claim 6 is claim 4 or claim 5.
In the remote maintenance device for internal equipment of the fusion reactor, a self-propelled carriage is provided with a hook for pushing or pulling a side surface of the internal equipment.

When the self-propelled trolley approaches the in-core device to be moved, the hook hooks on the side surface of the in-core device. Then, the equipment inside the furnace is pushed or pulled as the carriage moves.

[0035]

[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

[0042]

[0043]

[0044]

[0045]

[0046]

[0047]

[0048]

[0049]

[0050]

[0051]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a first embodiment of a remote maintenance apparatus for in-core equipment of a fusion reactor of the present invention. The first embodiment corresponds to the inventions of claims 1 and 2.

FIG. 1 shows a case in which the diverter 13 of the tokamak-type fusion reactor is carried in and out at the lower port 18 which is a maintenance port as an in-core device. The diverter 13, which is an in-core device, is radially installed in the fusion reactor as shown in FIG. 13, but one diverter 13 is shown in FIG. Further, one inner peripheral side arcuate guide mechanism 32a and one outer peripheral side arcuate guide mechanism 32b are installed on the installation surface of the in-core equipment of the fusion reactor. These arc-shaped guide mechanisms 32 are used in the diverter 13
Is arranged so as to be concentric with the torus-shaped space 11 of the fusion reactor in order to move the torso in the circumferential direction of the torus. Sector gears 27a and 27b having the center of the torus-shaped space 11 as the center of the pitch circle are attached to the outer peripheral surface of the inner peripheral side arc-shaped guide mechanism 32a and the inner peripheral surface of the outer peripheral side arc-shaped guide mechanism 32b, respectively. There is.

Further, the container 12 constituting the floor surface of the portion sandwiched by the two arc-shaped guide mechanisms 32 is curved downward, and has a space for exhausting impurities generated during the operation of the fusion reactor. It is secured below the diverter 13. On the bottom surface of the diverter 13, a pad 34 that slides along these arcuate guide mechanisms 32a and 32b is provided.
a and 34b are assembled respectively.

The size of one diverter 13 is about 6 m in length and 2 m in height in the radial direction of the torus-shaped space 11, width is about 0.3 m on the inner diameter side, and about 0.6 m on the outer diameter side. About 2
m, the width is about 0.3 m on the inner diameter side and about 0.6 m on the outer diameter side, and the weight is said to be about 24 tons.

Further, in FIG. 1, when the in-core device (diverter 13) in front of the maintenance port is not installed, the trolley 35 passes through the maintenance port (external port 18) and the in-core device in front of the maintenance port is removed. The state where it is inserted in the installation position is shown.

On the upper surface of the carriage 35, when the carriage 35 is inserted at the position where the diverter 13 is arranged in front of the maintenance port, the arc-shaped guide mechanism 32 provided on the floor surface.
partial guide mechanisms 36a, which are continuous with a and 32b,
36b is provided. That is, partial guide mechanisms 36a and 36b are formed on the carriage 35 on the inner peripheral side and the outer peripheral side corresponding to the arcuate guide mechanisms 32a and 32b.

Further, the sector gear 27a on the outer peripheral surface of the inner peripheral side arcuate guide mechanism 32a and the sector gear 27b on the inner peripheral surface of the outer peripheral side arcuate guide mechanism 32b have a gear having a pitch continuous with the partial guide mechanism 36a on the carriage 35. , 36b, the partial sector gears 37a, 37b are the outer peripheral surface of the partial guide mechanism 36a and the partial guide mechanism 3 respectively.
It is attached to the inner peripheral surface of 6b. In addition, since the container 12 is curved downward as described above, this trolley 35
Before being inserted into the arrangement position of the diverter 13 in front of the maintenance port, first, a temporary guide mechanism in the radial direction described below is inserted. The carriage 35 is guided by this temporary guide mechanism and inserted into the fusion reactor. A pad (not shown) is provided on the lower surface of the carriage 35 for moving the upper part of the temporary guide mechanism and the floor surface of the maintenance port (external port 18) in the radial direction.

As described above, in the first embodiment,
An arc-shaped guide mechanism 3 for moving the in-furnace equipment in the circumferential direction
2 is provided on the installation surface of the equipment inside the furnace, and when the equipment inside the furnace in front of the maintenance port is not installed, the carriage 35
Is inserted into the position of the equipment in the furnace in front of the maintenance port. A partial guide mechanism 36 that forms a guide mechanism that is continuous with the arcuate guide mechanism 32 is attached to the carriage 35.

Therefore, when the carriage 35 is inserted into the position of the equipment inside the furnace in front of the maintenance port, the partial guide mechanism 36 which is continuous with the arcuate guide mechanism 32 provided on the installation surface of the equipment inside the furnace is the carriage 35. It is possible to transfer the diverter 13 which is formed on the upper part of the vehicle and is located at a position other than the front surface of the maintenance port onto the partial guide mechanism 36 of the carriage 35 along the arcuate guide mechanism 32.

In the first embodiment, the sector gear 27, which is concentric with the arc-shaped guide mechanism 32, is provided on the arc-shaped guide mechanism 32, and the furnace on the front side of the maintenance port in front of the port is not installed. A partial sector gear 37 that is continuous with the sector gear 27 when the carriage 35 is inserted into the position of the internal equipment is further assembled to the partial guide mechanism 36 of the carriage 35.

As described above, according to the first embodiment of the present invention, the core 35 is mounted on the carriage 35 which is radially moved in the maintenance port and is inserted into the position of the in-core device in front of the maintenance port. Partial guide mechanism 3 that is continuous with the arcuate guide mechanism 32 installed on the equipment installation surface of the fusion reactor
6 and a partial sector gear 3 that is continuously connected to the sector gear 27 that is also installed on the reactor internal equipment installation surface of the fusion reactor.
7, the heavy diverter 13 can be transferred to the dolly 35 inserted in the position in front of the maintenance port by a smooth movement in the circumferential direction, and can be easily moved in the radial direction. Further, since a complicated traveling mechanism for bending at a right angle and a complicated guide mechanism are not required, a simple mechanism can be used and reliability is improved.

Next, a second embodiment of the present invention will be described. The second embodiment corresponds to claim 3. FIG. 2 is a plan view showing a second embodiment of the present invention, and FIG. 3 is a side view showing the second embodiment of the present invention.

This second embodiment differs from the first embodiment shown in FIG. 1 in that when the carriage 35 is inserted into the fusion reactor, the adjacent reactor equipment (diverter 13) is circled. It is pulled along the arc-shaped guide mechanism 32 to be mounted on the partial guide mechanism 36 of the carriage 35, or the in-reactor equipment preliminarily mounted on the partial guide mechanism 36 of the carriage 35 is circumferentially arranged along the arc-shaped guide mechanism 32. A moving arm 38 for moving or the like is provided on the carriage 35. That is, the carriage 35 has a function of sliding the adjacent diverter 13 in the circumferential direction. 2 and 3,
FIG. 2 shows a state in which the diverter 13 is mounted on the trolley 35, FIG. 2 is a plan view thereof, and FIG. 3 is a diverter 1.
It is a side view which shows the shape of FIG.

2 and 3, arcuate movement arms 38a and 38b are guided under the carriage 35 so as to be slidable in the circumferential direction.
Protrusions 3 that can be extended or retracted at the ends of a and 38b
9a and 39b are assembled. Moving arm 38
A sector gear (not shown) is provided on the outer peripheral surfaces of a and 38b, and the pinion gear 40 meshes with the sector gear.
a and 40b are rotationally driven by a worm mechanism (not shown) driven by the drive shafts 41a and 41b. The drive shafts 41a and 41b are rotationally driven by drive units 42a and 42b including a motor and a speed reducer. A temporary guide mechanism 43 that guides the carriage 35 in the radial direction is inserted under the carriage 35.

Here, in the second embodiment, the moving arms 38a and 38b are structured to slide in the circumferential direction, but the moving arm 38 which expands and contracts like a telescope.
You may comprise by a, 38b etc. When the telescopic movement arms 38a and 38b are provided, not only the flexibility of expansion and contraction but also the freedom of rotation around the vertical axis for changing the direction along the circumference of the torus-shaped space 11 are provided. To be

The fixing device 44a shown in FIG. 2 and FIG.
44b and the convex portion 47, the concave portion 48, the block 49, which are the constituent elements of the fixing device 44a in FIG.
The pin 45 and the hole 46, which are components of 4b, will be described later.

As described above, in the remote maintenance device for the fusion reactor according to the second embodiment, when the carriage 35 is inserted into the position of the equipment inside the maintenance port in front of the maintenance port, the carriage 3
An in-reactor device is attracted along the arc-shaped guide mechanism 32 by the moving arm 38 provided on the lower side of the carriage 5 to be mounted on the partial guide mechanism 36 of the carriage 35, or the carriage 35.
The arc-shaped guide mechanism 32 is installed in the furnace in advance.
Along the circumference of the furnace to the arc-shaped guide mechanism 32 on the installation surface of the in-core device.

As described above, according to the second embodiment of the present invention, the lower side of the truck 35 that is radially moved in the maintenance port and is inserted into the position of the in-core device in front of the maintenance port. Is provided with a moving arm 38, and the adjacent diverter 13 is pulled along the arc-shaped guide mechanism 32 to be mounted on the carriage 35, or the diverter 13 mounted on the carriage 35 is guided along the arc-shaped guide mechanism 32. Since the diverter 1 in front of the maintenance port can be moved in the circumferential direction within a limited space where the diverter 13 in front of the maintenance port has been removed,
The diverter 13 next to 3 can be moved.

Next, a third embodiment of the present invention will be described. The third embodiment corresponds to claims 4 to 6, and FIG. 4 shows a plan view and FIG. 5 shows a side view thereof. This third embodiment is shown in FIG. 1 and FIG.
The self-propelled trolley 50 is mounted on the trolley 35 shown in FIG. 1 and freely and continuously moves between the partial guide mechanism 36 and the arc-shaped guide mechanism 32, and the in-core equipment (diverter 13) to move to mount the vehicle 35,
The in-core device (diverter 13) mounted on the carriage 35 is inserted.

The self-propelled carriage 50 is driven by a gear 51 meshing with the sector gears 27 and 37 provided on the arcuate guide mechanism 32 and the partial guide mechanism 36, and the gear 5.
A self-propelled carriage drive mechanism 52 for driving the self-propelled carriage 5 by driving the gear 51 by the drive mechanism 52.
0 freely and continuously moves between the partial guide mechanism 36 and the arc-shaped guide mechanism 32. Further, the self-propelled trolley 50 is provided with a hook 53 for pushing or pulling the side surface of the in-core device, and the in-core device (diverter 13) is
A stop pin 54 for locking the hook 53 is provided.

The wrench and the wrench drive mechanism 5 shown in FIG.
Reference numeral 5 is for operating a fixing device 44 described later.

4 and 5, the self-propelled carriage 50 has partial sector gears 37a and 37b provided on the partial guide mechanisms 36a and 36b, and an arc-shaped guide mechanism 32.
Gears 51a and 51b that mesh with the sector gears 27a and 27b of a and 32b, and drive mechanisms 52a and 52b that include a motor and a speed reducer that rotate the gears 51a and 51b.
Are provided on the inner peripheral side and the outer peripheral side, respectively. Further, a pad (not shown) is attached to a portion that comes into contact with the upper surface and the side surface portion of the partial guide mechanism 36.

When the self-propelled carriage 50 travels on the arc-shaped guide mechanism 32 and approaches the side surface of another diverter 13, the side surface of the diverter 13 is pushed or pulled in the circumferential direction of the fusion reactor. The hooks 53a, 53b and the rotation driving mechanism (not shown) for the hooks 53a, 53b are provided, and the hooks 53a, 53b are provided on the diverter 13 side.
Stop pins 54a, 54b for hooking a, 53b
Is provided.

As described above, in the remote maintenance device according to the third embodiment, the self-propelled carriage 50 is mounted on the carriage 35, and when the carriage 35 is inserted into the position of the in-core device in front of the maintenance port, The self-propelled carriage 50 has a partial guide mechanism 3
6 and the arc-shaped guide mechanism 3 provided on the installation surface of the in-core equipment
It will move freely between the two. Then, it approaches the adjacent in-core device (diverter 13), and the hook 53 holds the stopper pin 54 of the in-core device (diverter 13).
To lock the equipment inside the furnace toward the carriage 35. As a result, the in-furnace equipment can be carried out to the outside via the maintenance port. Further, when the equipment in the furnace is carried in, the reverse operation is performed, and the equipment in the furnace mounted on the carriage 35 is moved by the self-propelled carriage 50 to the arc-shaped guide mechanism 32.
You will have to push it to its position along.

As described above, according to the third embodiment of the present invention, on the trolley 35 which is radially moved in the maintenance port and is inserted into the position of the in-core device in front of the maintenance port. Self-propelled trolley 50 to be mounted is trolley 3
5 and the arc-shaped guide mechanism 32 can be freely and continuously moved by a simple operation of rotating the gear 51, approaching the diverter 13 and operating the fixing device 44 of the diverter 13 or hooking the hook 53. Since the diverter 13 can be freely moved in the circumferential direction, the diverter 13 separated from the maintenance port can be replaced.

Next, a description will be given of a fourth embodiment of the present invention with respect to the fixing device 44 for the internal equipment of the fusion reactor of the present invention. The fourth embodiment includes claims 7 to 10.
The present invention relates to the in-core device fixing device 44 in which the in-core device arrangement position is not in front of the maintenance port. Hereinafter, a fixing device 44 for fixing the diverter 13 which is an in-furnace device to the outer circumferential arc-shaped guide mechanism 32b.
b and the diverter 13 are provided with an inner circular arc guide mechanism 32.
The configuration of the fixing device 44a that is fixed to a will be described.

First, FIG. 6 is a plan view showing a fixing device 44b for fixing the diverter 13, which is an in-core device, to the outer peripheral side arcuate guide mechanism 32b in the fourth embodiment of the present invention. The fixing device 44b is composed of a pin 45 provided in the furnace equipment and having a constant thickness slidable in the radial direction of the arc-shaped guide mechanism 32b, and a hole 46 provided in the arc-shaped guide mechanism 32b and fitted into the pin 45. Composed.

That is, the pin 45a is attached to the connecting portion 57 of the two links 56a and 56b that are flexibly connected, and the ends of the two links 56a and 56b are arranged in the circumferential direction of the fusion reactor. Installed screws 58a, 58b
The nuts 59a and 59b are swingably assembled, and the pins 45a are moved in the radial direction by rotating the screws 58a and 58b.

Here, in the diverter 13 in FIG. 2, the circular arc guide mechanism 32b on the outer peripheral side is provided with a circular hole 46 in the radial direction, and the diverter 13 has a hole 46 in the arc guide mechanism 32b. A pin 45 having a circular cross-sectional shape and a uniform thickness, which is fitted so as to be slidable in the radial direction, is assembled.

An enlarged view of the mechanism for slidingly driving the pin 45 is shown in FIG. 6A. In FIG.
5a is a radial hole 46 provided on the diverter 13 side.
It is guided by a and is constrained to move only in the axial direction. The base end portion of the pin 45a is swingably attached to the connecting portion 57a of the two links 56a and 56b that are bendably connected, and the end portions of the respective links 56a and 56b are in the circumferential direction of the fusion reactor. 58a, 5 installed on the
It is rotatably attached to nuts 59a and 59b which move along 8b. The end of the screw shaft is a hexagonal head 6 so that it can be rotationally driven by an external wrench.
0 is formed.

These screws 58a and 58b have a one-piece structure, and the threads of the nuts 59a and 59b are arranged in opposite directions. When the screw shaft is rotated, these nuts 59a and 59b move in opposite directions,
The holes 4 formed in the arc-shaped guide mechanism 32 are bent by bending the links 56a and 56b and sliding the pin 45 in the radial direction.
6 has a structure to be inserted. Figure 6
It shows in (b).

The base end portion of the pin 45a, that is, the connecting portion 57a
Are hingedly connected to the links 56a, 56b.
The pin 45a has a uniform thickness, and the arc-shaped guide mechanism 32
Since the hole 46a on the b side is longer than the pin 45a, the structure is not constrained in the radial direction even after the insertion. Further, the nuts 59a and 59b are configured to move by being guided by grooves provided along the screws 58a and 58b.

Further, the two links 56c and 56d for sliding the other adjacent pin 45b and the screw have the same structure, and the screws 58c and 58d are the pins 4 respectively.
It has an integral structure with a screw shaft that drives 5b. That is, the structure is such that the two pins 45a and 45b can be simultaneously driven to slide by rotating one screw shaft.

FIG. 6 (c) shows the state of FIG. 6 (b) as seen from the direction of the arrow, and shows that the links 56a, 56b are configured to sandwich the nuts 59a, 59b in the vertical direction. ing.

Next, the structure of the fixing device 44a for fixing the diverter 13 to the inner guide guide mechanism 32a will be described with reference to FIG. Inner circumference arc guide mechanism 3
A concave portion 48 is formed in the radial direction on the inner peripheral side of 2a, and a convex portion 47 that is slidably driven in the outer radial direction and fits into the concave portion 48 is attached to the diverter 13. Further, the diverter 13 is provided with a block 49 so as to be in close contact with the outer peripheral surface of the inner peripheral arcuate guide mechanism 32a. The drive mechanism of the convex portion 47 is a pin 45 fitted to the outer circumferential arc guide mechanism 32b shown in FIG.
It is similar to the drive mechanism of.

That is, the projecting portion 47 is swingably attached to the connecting portion of the two flexibly connected links, and the base end portion of the link is swingably attached to the nut that moves along the screw. ing. By rotating the screw, the projection is slid in the radial direction and fitted into the recess 48 of the guide mechanism. At the end of the screw, a hexagonal head 60 is formed similarly to that shown in FIG.

Here, the difference from the fixing device to the outer circumferential side arcuate guide mechanism 32b is that the tip of the convex portion 47 is formed into the concave portion 48.
By pressing the inner circular arc side guide mechanism 32a between the convex portion 47 and the outer peripheral side block 49 by pressing it against the bottom portion, the diverter 13 is also fixed in the radial direction.

In the fourth embodiment, the pin 45 provided in the in-core device is fitted in the hole 46 provided in the outer peripheral arcuate guide mechanism 32b so as to be slidable in the radial direction.
This hole 46 is longer than the pin 45. Therefore,
Since the pin 45 is slidable in the radial direction, a large electromagnetic force that acts in the radial direction does not act on the pin 45 during the operation of the fusion reactor, and even if the internal equipment extends in the radial direction due to thermal deformation. No excessive stress will occur. Further, since the fixing position is determined by the fitting of the pin 45, the fixing accuracy can be increased regardless of the movement accuracy of the equipment in the furnace.

Further, the pin 45 is flexibly connected 2
It is attached to the bent part of the link 56 of the book, and the screw 5
Since the pin 45 is moved in the radial direction by rotating 8 and is inserted into the outer peripheral side arcuate guide mechanism 32b, the pin 45 is moved by the simple operation of rotating the screw 58 in the circumferential direction from the side surface of the in-core device. The equipment in the furnace can be fixed by sliding it in the direction.

On the other hand, the convex portion 47 provided on the internal equipment side is fitted into the concave portion 48 provided on the inner peripheral side of the inner peripheral side arcuate guide mechanism 32a, and the inner peripheral side arcuate guide mechanism 3 is formed.
Block 49 provided so as to abut on the outer peripheral side of 2a
The inner peripheral side arcuate guide mechanism 32a is held between the inner peripheral side arcuate guide mechanism 32a and the convex portion 47 by sandwiching it.
Fix to 2a. Then, the convex portion 47 is attached to the bent portion of the two flexibly connected links, and the ends of the respective links are swingably assembled to the nuts of the screws installed in the circumferential direction of the fusion reactor. Therefore, the in-core device can be fixed to the guide mechanism by a simple operation of rotating the circumferential screw from the side surface of the in-core device.

As described above, according to the fourth embodiment of the present invention, the diverter 13 installed on the two arcuate guide mechanisms 32 for moving the diverter 13 in the circumferential direction is provided outside. A pin 45 having a constant thickness, which is slidably fitted in a hole 46 provided in the radial arc guide mechanism 32b in a radial direction, and a concave portion on the inner diameter side so as to sandwich the arc guide mechanism 32a on the inner diameter side. Convex part 4 pressed against 48
Since the fixing device 44 composed of 7 and 7 is provided, even if the diverter 13 extends due to thermal deformation, excessive thermal stress does not occur.

In addition, a large vertically downward electromagnetic force is applied to the pin 4
Since it can be supported on the upper surface of the arc-shaped guide mechanism 32 instead of 5, it has high strength and reliability. Since a large electromagnetic force directed inward in the radial direction can be supported by the outer peripheral surface of the arcuate guide mechanism 32a on the inner diameter side, strength and reliability are high. Furthermore, pin 45
The fixed position 4 of the diverter 13 by fitting the convex portion 47
Since 4 is determined, high fixing accuracy can be obtained regardless of the positioning accuracy of the moving mechanism.

Next explained is the fifth embodiment of the invention. This fifth embodiment corresponds to claim 11, and includes a wrench that meshes with a hexagonal head 60 at the end of the screw 58 in the fixing device 44, and a wrench drive mechanism 55 for rotating the wrench. It is provided on the carriage 35 or the self-propelled carriage 50 so that the fixing device 44 can be attached and detached.

In FIG. 5, reference numeral 55 schematically shows a wrench and a wrench drive mechanism. The wrench drive mechanism 55 having a wrench engaged with a hexagonal head 60 at the end of the screw for radially driving the pin 45 and the convex portion 47 to rotate the screw. As a result, the in-core device (diverter 13) is removed from the arcuate guide mechanisms 32a and 32b. As a result, the carriage 35 and the self-propelled carriage 50 are
Not only can the equipment inside the furnace be moved, but the equipment inside the furnace can also be fixed and released.

According to the fifth embodiment, the screw 58 assembled in the circumferential direction and the nut 59 engaging with the screw 58 are provided.
The pin 45 and the convex portion 47 move in the radial direction by the slide mechanism including the link 56 that is attached to the nut 59 so that the base end portion is swingably assembled and is bent. Therefore, the pin 45 and the convex portion 47 are composed of a wrench facing in the circumferential direction. The diverter 13 can be fixed or released by the wrench drive mechanism 55 having a simple structure.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. 7 and 8. The sixth embodiment corresponds to claims 12 and 13. In the fourth and fifth embodiments, the fixing device 4 for the in-core device that is not located in front of the maintenance port is used.
4 is shown, but in the sixth embodiment, the fixing device 4 for the in-core device located in front of the maintenance port is shown.
4 is shown.

FIG. 7 is a plan view showing a sixth embodiment of the present invention. The fixing device 44 for fixing the diverter 13 installed on the front surface of the maintenance port to the inner peripheral side arcuate guide mechanism 32a is slid in the circumferential direction of the arcuate guide mechanism 32a from the side surface of the in-core device located on the front surface of the maintenance port. Pins 61a and 61b, and pins 61a and 61b, which are provided in the cross-section of the arc-shaped guide mechanism 32a.
And a hole 62 into which is fitted. And pin 6
1a and 61b are two links 6 that are flexibly connected.
3a and 63b are attached to the connecting portion, which is a bent portion, and 2
The ends of the links 63a and 63b of the book are swingably assembled to the nuts 65 of the screws 64 installed in the radial direction of the fusion reactor. By rotating the screws 64, the links 63a and 63b are connected. Bend the pin 61a,
61b is adapted to be slid in the circumferential direction. The rotation of the screw 64 is performed by a gear unit 66 provided at the end portion on the outer peripheral side.

That is, two pins 61a and 61b projecting from the side surface of the diverter 13 in the circumferential direction are provided on the lower portion of the diverter 13 installed in front of the maintenance port, and the inner circular arc guide mechanism 32a is provided. Are fitted in holes 62a and 62b provided in the cross section. These pins 61a, 61b are guided so as to be slidable in the circumferential direction, links 63a, 63b are swingably assembled to the base end portions, and the other ends of the links 63a, 63b are attached in the radial direction. It is swingably attached to a nut 65 that moves along the screw 64. A gear unit 66 is fixed to the outer peripheral side end of the screw 64.

FIG. 8 is a side view showing a state in which the fixing mechanism operating carriage 67 is inserted under the diverter 13.
A drive shaft 72 is attached to the fixed mechanism operating carriage 67, a gear 68 meshing with the gear unit 66 is attached to the tip end thereof, and a drive mechanism 69 thereof is attached to the base end portion. Fixed mechanism operation cart 67
Is inserted into the lower side of the diverter 13, the gear 68 is engaged and rotated, and the nuts 65 are slid in the radial direction so that the pins 61a and 61b are inserted into or removed from the cross section of the inner circumferential side arcuate guide mechanism 32a. To do. The fixed mechanism operating carriage 67 is guided by the temporary guide mechanism 43 and inserted into the fusion reactor.

As described above, in the sixth embodiment,
The diverter 13 installed in front of the maintenance port
Cannot be loaded, unloaded, fixed, or released by the trolley 35 or the self-propelled trolley 50. Therefore, the fixing mechanism operating trolley 67 is used instead.

According to the sixth embodiment, it is slid in the circumferential direction from the side surface of the diverter 13 in front of the maintenance port and is fitted in the hole 62 provided in the cross-section of the arc-shaped guide mechanism 32a on the inner diameter side. Since the fixing device 44 using the pin 61 is provided, there is an effect that the diverter 13 can be fixed by a simple operation.

Next, FIG. 9 shows a seventh embodiment of the present invention. The seventh embodiment corresponds to claim 14. In the sixth embodiment, the diverter 13 on the front side of the maintenance port is premised on being radially divided, but the shape of the diverter 13 on the front side of the maintenance port is substantially parallel to the longitudinal direction of the maintenance port. May be. In the seventh embodiment,
This is the structure of the diverter 13.

In FIG. 9, the side surface of the diverter 13 in front of the maintenance port has a shape parallel to the maintenance port when viewed from above, and the left and right side surfaces of the lower portion of the diverter 13 have protrusions 70a. , 70
b is formed, and a groove for guiding the protrusions 70a and 70b in the radial direction is formed in the adjacent diverter 13. That is, the guide mechanism is configured so that the protrusions 70a and 70b and the groove of the adjacent in-core device can slide with respect to the adjacent in-core device. The boundary between the diverters 13 on both sides of the diverter 13 and the diverter 13 in front of the maintenance port is not radial, but the boundary between other diverters 13 is radial.

As in the fixing device 44 in the sixth embodiment, the lower portion of the diverter 13 in front of the maintenance port is slidably driven in the circumferential direction from the side surface of the diverter 13 to project in an arc shape on the inner circumferential side. Guide mechanism 32
Two pins 61a and 61b fitted in a hole 62 provided in the cross section of b are provided. These pins 61a, 6
Similarly to the sixth embodiment, 1b is slidably driven by a drive mechanism including a screw 64 and links 63a and 63b.

As described above, in the seventh embodiment, the shape of the diverter 13 on the front surface of the maintenance port is substantially parallel to the longitudinal direction of the port, and the guide mechanism by the protrusion 70 provided on the side surface under the diverter 13 is provided. Is guided so as to be slidable with respect to the equipment inside the furnace. Therefore, even when there is no space for configuring the guide mechanism below the in-core device, the in-core device can be moved in the radial direction.

As described above, according to the seventh embodiment, the shape of the diverter 13 in front of the maintenance port is substantially parallel to the longitudinal direction of the maintenance port, and the side surface of the lower portion of the diverter 13 is Since the guide mechanism is configured so that it can slide with respect to the adjacent diverter 13, even if there is not enough space for laying the radial guide mechanism, the diverter 13 in front of the maintenance port can be guided and replaced. In addition, the diverter 13 in front of the maintenance port can be firmly supported by the diverters 13 on both sides.

Next, the procedure for removing the diverter 13 will be described below. The shield plug (not shown) of the maintenance port is removed to open the external port 18 which is the maintenance port, and the cooling pipe 33 of the diverter 13 is cut and removed. The fixing of the diverter 13 on the front of the maintenance port and the outer circumferential side arcuate guide mechanism 32 is released.

That is, the temporary guide mechanism 43 in the radial direction is inserted under the diverter 13 in front of the maintenance port, and the fixing mechanism operating carriage 67 is installed along the temporary guide mechanism 43 in the diverter 13 in front of the maintenance port. Insert below. Then, the drive shaft 72 is rotated to rotate the diverter 13 and the inner peripheral side arcuate guide mechanism 3.
The fixing mechanism 2 with the diverter 13 is released from the fixing mechanism operation carriage 67 in the radial direction. Due to these operations, the diverter 1 in front of the maintenance port
3 is removed.

Next, the trolley 35 with the self-propelled trolley 50 mounted therein is inserted into the position where the diverter 13 was installed in front of the maintenance port by a radial moving device (not shown). The carriage 1 is fixed to the structure of the fusion reactor by a carriage fixing mechanism (not shown). Then, the wrench provided in the self-propelled carriage 50 is applied to the hexagonal head 60 of the screw 58 of the fixing mechanism of the adjacent diverter 13, and the pin 45 and the convex portion 47 are slid in the radial direction by rotating the wrench. The diverter 13 and the arc-shaped guide mechanism 32 are released from the arc-shaped guide mechanism 32 to release the fixation. Therefore, after the self-propelled carriage 50 is mounted on the carriage 35 and pulled out in the radial direction, the self-propelled carriage 50 is mounted on the carriage 35.
Remove from.

Then, the trolley 35 is again inserted and fixed at the position where the diverter 13 was located in front of the maintenance port. The pinion gear 40 meshed with the sector gear on the side surface of the moving arm 38 provided on the lower side of the carriage 35 is rotated to insert the tip of the moving arm 38 into the lower side of the adjacent diverter 13. Further, the projection 39 is engaged with the tip of the diverter 13, and the diverter 13 is mounted on the trolley 35 by being hooked on the adjacent diverter 13 and then drawn. Since the length of the moving arm 38 is shorter than the width of the diverter 13, the two adjacent diverters 13 can be entirely moved onto the carriage 35 by two pulling operations. As described above, since the partial guide mechanism 36 that is continuous with the arcuate guide mechanism 32 provided on the floor is formed on the upper surface of the carriage 35, the adjacent diverter 13 smoothly moves onto the carriage 35. it can.

Next, the truck 35 equipped with the diverter 13
In the radial direction, through the maintenance port,
The cart 35 and the diverter 13 are moved to a space called a cask outside the fusion reactor. The diverter 13 carried into the cask is moved to the outside of the cask by using a carrying device (not shown).

The carriage 35 and the self-propelled carriage 50 are again inserted into the furnace, this time, the fixing of the diverter 13 on the side opposite to the diverter 13 previously removed is released, and the diverter 13 is removed by the same procedure. By these operations, the diverter 13 in front of the maintenance port and the diverters 13 on both sides thereof can be removed.

In the cask, the self-propelled carriage 50 is mounted on the carriage 35, inserted again into the fusion reactor, and fixed at the position where the diverter 13 in front of the maintenance port was. After that, the two sets of gears 5 provided on the self-propelled carriage 50
The self-propelled carriage 50 is caused to travel in the circumferential direction by rotating 1a and 51b in synchronization with the drive mechanisms 52a and 52b. On the carriage 35, in addition to the partial guide mechanism 36 described above, a partial sector gear 37 is provided so that the pitch is continuous with the sector gear 27 provided in the arcuate guide mechanism 32, and therefore the self-propelled carriage 50 is The carriage 35 can be smoothly moved onto the arc-shaped guide mechanism 32 on the furnace structure side.

When the self-propelled carriage 50 approaches the side surface of the diverter 13 adjacent to the already removed diverter 13,
The hooks 53a and 53b are rotated and hooked on the stop pins 54a and 54b provided on the diverter 13 side.
Then, a wrench is applied to the hexagonal head 60 of the screw 58 of the fixing device 44 of the diverter 13 and rotated to release the fixation between the diverter 13 and the arc-shaped guide mechanism 32.

After that, the self-propelled carriage 50 is made to travel with the hooks 53a and 53b hooked, and after passing through the position where the diverter 13 was located in front of the maintenance port to the position where the diverter 13 is mounted on the carriage 35, Stop. At that position, the hexagonal head 60 for fixing the diverter 13 to the inner circumferential side arcuate guide mechanism 32a is rotated to fix the diverter 13 to the partial guide mechanism 36a of the carriage 35, and the hooks 53a and 53b are removed. Then, trolley 35
Is moved in the radial direction and the diverter 13 is carried out of the fusion reactor.

By repeating this operation, the other diverter 13 is sequentially moved onto the carriage 35 in front of the maintenance port and carried out. As a result, the diverter 13
Can be successively removed from the furnace. After all the divertors 13 to be removed are removed, the self-propelled carriage 50 is returned to the top of the carriage 35 and withdrawn outside the fusion reactor.

The operation of installing the diverter 13 in the fusion reactor is carried out in the reverse order of the above-mentioned operation of carrying out the in-reactor equipment. That is, first, the self-propelled carriage 50 is mounted on the carriage 3
After mounting it on the 5 and inserting it in front of the maintenance port,
The self-propelled carriage 50 is moved in the circumferential direction and kept waiting. The carriage 35 is returned to the cask, a new diverter 13 is installed, and the diverter 13 is inserted in the front of the maintenance port. Therefore, the hooks 53a and 53b of the self-propelled carriage 50 that has been on standby are hooked on the new diverter 13, and then the diverter 13 is pushed to move the diverter 13 to the position where it should be installed.

Then, the diverter 1 is fixed by the fixing device 44.
3 is fixed to the arcuate guide mechanism 32, and the hook 53a,
Release 53b. By repeating this operation,
Divertor 1 other than the front of the maintenance port and both sides of it
Install with 3.

Next, after removing the self-propelled carriage 50, a new diverter 13 is mounted on the carriage 35, inserted into the front of the maintenance port, and moved by the moving arm 38 in the circumferential direction to be fixed. After installing the diverters 13 on both sides in front of the maintenance port, finally, the diverters 13 in front of the maintenance port are inserted and fixed. further,
The cooling pipe 33 is connected and a shield plug is installed.

The operation of the fixing device 44 for fixing the diverter 13 to the arcuate guide mechanism 32 will be described. As described above, the outer circumferential arc guide mechanism 32b
A pin 45 having a constant thickness is slidably inserted in the radial direction, and the convex portion 47 is pressed from the inner diameter side arc-shaped guide mechanism 32a to the inner circumference side arc-shaped guide mechanism 32a. A block 49 is provided on the outer diameter side of the inner circumferential side arcuate guide mechanism 32a so as to face the convex portion 47.

Therefore, when the diverter 13 is fixed, an electromagnetic force of 200 tons applied vertically downward is supported by the upper surfaces of the arc-shaped guide mechanisms 32 on the outer and inner circumference sides and the pads 34 abutting on the arc-shaped guide mechanisms 32, and is directed radially inward. The electromagnetic force of 150 tons is applied to the outer circumferential surface of the inner-circular arc-shaped guide mechanism 32a and the block 47 in contact with the outer circumferential surface of the guide mechanism 32a.
The electromagnetic force of 0 ton is supported by the convex portion 47 pressing the inner circumferential side arcuate guide mechanism 32a, and the electromagnetic force of 40 ton vertically upward and the electromagnetic force of 10 ton in the circumferential direction are the pin 45 and the convex portion 47. And will support.

Also, the diverter 13 may be operated during the operation of the fusion reactor.
When it becomes hot and expands in the radial direction, it slides between the outer-circumferential-side arcuate guide mechanism 32b and the pin 45, so that a force that pushes the arcuate-shaped guide mechanism 32 outward is not generated.

Next, the operation when the diverter 13 in front of the maintenance port is not radially divided but has a shape substantially parallel to the longitudinal direction of the maintenance port will be described. As described above, the protrusions 70 are formed on the left and right side surfaces of the lower portion of the diverter 13, and the adjacent diverter 13 is formed with the groove for guiding the protrusion 70 in the radial direction. , The left and right diverter 13 supports the vertical load,
It functions as a guide mechanism when moving the diverter 13 in the radial direction.

[0124]

As described above, according to the present invention, the trolley has the function of moving the adjacent in-reactor equipment.
It is possible to move the in-core equipment even when the space is limited due to the removal of individual in-core equipment. Therefore, the working efficiency of the vehicle running on the orbit deployed in the fusion reactor and the manipulator mounted on the vehicle is not reduced. As a result, it is possible to accurately and smoothly move a large-weight in-core device, and smoothly switch the moving direction of the in-core device in front of the maintenance port.

[0125]

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a truck according to a first embodiment of the present invention is inserted in a front position of a maintenance port.

FIG. 2 is a plan view showing a state in which a truck according to a second embodiment of the present invention is inserted in a front position of a maintenance port.

FIG. 3 is a side view of FIG.

FIG. 4 is a plan view showing a state in which a carriage equipped with a self-propelled carriage according to a third embodiment of the present invention is inserted in a front position of a maintenance port.

5 is a side view of FIG.

FIG. 6 is an explanatory view of a mechanism for slidingly driving a pin of a fixing device for an in-core device according to a fourth embodiment of the present invention.

FIG. 7 is a plan view of a fixing device according to a sixth embodiment of the present invention.

FIG. 8 is a side view of FIG. 7.

FIG. 9 is a plan view of a diverter in front of the maintenance port having a shape parallel to the maintenance port according to the seventh embodiment of the present invention.

FIG. 10 is a vertical cross-sectional view showing an example of a tokamak-type fusion reactor.

FIG. 11 is a perspective view showing a conventional remote maintenance device for a tokamak fusion reactor.

FIG. 12 is a perspective view of a telescopic manipulator and a vehicle portion in a conventional remote maintenance device of a tokamak fusion reactor.

FIG. 13 is a plan view showing a state in which diverters arranged in a radial pattern are viewed from above.

[Explanation of symbols]

11 torus space 12 containers 13 diverter 14 blanket 15 Toroidal magnetic field coil 16 poloidal magnetic field coil 17 Central Port 18 Lower port 19 External container 20 circular links 21 orbit 22 Telescopic manipulator 23 Vehicle 24 Orbit storage means 25 Orbital deployment means 26 Starting support device 27 sector gear 28 Drive mechanism section 29 fixing ring 30 movable ring 31 Drive 32 Circular guide mechanism 33 Cooling pipe 34 pads 35 dolly 36 Partial guide mechanism 37 partial sector gear 38 Moving arm 39 protrusions 40 pinion gear 41 drive shaft 42 Drive unit 43 Temporary guide mechanism 44 Fixing device 45 pin 46 holes 47 convex 48 recess 49 blocks 50 self-propelled trolley 51 gears 52 Drive mechanism 53 hooks 54 stop pin 55 Wrench drive mechanism 56 links 57 Connection 58 screws 59 nuts 60 hexagonal head 61 pin 62 holes 63 links 64 screws 65 nuts 66 gear unit 67 Bogie for operating the fixing mechanism 68 gear 69 Drive mechanism 70 Projection 71 pin 72 drive shaft

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Seiichi Fukatsu 1 801 Mukayama, Naka-machi, Naka-cho, Naka-gun, Ibaraki Prefecture 1 In the Naka Research Laboratory, Japan Atomic Energy Research Institute (72) Shin Murakami 1-Toshiba, Fuchu, Tokyo In the Toshiba Fuchu factory (72) Inventor Tadashi Munakata 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Toshiba Fuchu factory (56) References JP 59-145993 (JP, A) JP 62-50687 ( JP, A) JP-A-62-100689 (JP, A) Fukukaihei 4-118242 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G21B 1/00

Claims (6)

(57) [Claims] 1. A maintenance port for carrying out in-core equipment of a fusion reactor from and into the fusion reactor, and installation of the in-core equipment in the fusion reactor. An arc-shaped guide mechanism provided on a surface for mounting the in-core device and moving it in the circumferential direction, and inserted into the position of the in-core device when the in-core device located in front of the maintenance port is not installed And a partial guide mechanism which is provided on the upper surface of the trolley and is continuous with the arc-shaped guide mechanism when the trolley is inserted into the fusion reactor to move and mount the reactor internal equipment on the trolley. And a remote maintenance device for in-core equipment of a fusion reactor. 2. The remote maintenance device for nuclear reactor internal equipment according to claim 1, wherein sector gears are provided on the circumferential surfaces of the arc-shaped guide mechanism and the partial guide mechanism in the same direction, respectively. 3. When the trolley is inserted into the fusion reactor, adjacent in-reactor equipment is pulled along the arc-shaped guide mechanism to be mounted on the partial guide mechanism of the trolley, or the trolley 2. The trolley is provided with a moving arm for moving in-core equipment preliminarily mounted on the partial guide mechanism in the circumferential direction along the arcuate guide mechanism. Item 3. A remote maintenance device for equipment in a nuclear fusion reactor according to Item 2. 4. A self-propelled carriage that freely and continuously moves between the partial guide mechanism and the arcuate guide mechanism is mounted on the carriage, and the carriage is inserted into the fusion reactor. The remote maintenance device for the in-reactor equipment of a fusion reactor according to any one of claims 1 to 3, wherein: 5. The self-propelled carriage is provided with a gear that meshes with the sector gear provided in the arcuate guide mechanism and the part guide mechanism, and a drive mechanism that drives the gear, and the drive mechanism drives the gear. 5. The fusion reactor according to claim 4, wherein the self-propelled carriage is freely and continuously moved between the partial guide mechanism and the arcuate guide mechanism by driving the. Remote maintenance device for furnace equipment. 6. The fusion reactor core according to claim 4 or 5, wherein the self-propelled carriage is provided with a hook for pushing or pulling a side surface of the reactor internal equipment. Equipment remote maintenance device.