JP4087509B2 - Reactor demolition equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reactor biological shielding wall demolition apparatus in which an activation part of a biological shielding wall of a nuclear reactor is decomposed according to the activation level and the disassembled block is automatically carried out of the reactor.
[0002]
[Prior art]
In general, when dismantling the biological shielding wall of a boiling water reactor (BWR) among light water reactor type reactors for reasons such as decommissioning, the cutting and dismantling device is removed from above by using an overhead crane on the work floor. The waste that has fallen into the shielding wall and disassembled by this cutting and demolition device, or assembled with a scaffold fixed in the biological shielding wall, operated the demolition device attached to this, and the waste that has been finely cut and disassembled by this cutting and demolition device It was planned to be further transported to the work floor with an overhead crane.
[0003]
[Problems to be solved by the invention]
By the way, in the reactor demolition apparatus described above, it is inefficient because it takes time and effort to move and handle the cutting and demolition apparatus due to the shape of the biological shield of the reactor, etc. There was a drawback that it could not be held and was dangerous.
[0004]
The object of the present invention was made in view of the above-mentioned conventional drawbacks, and stably holds the dismantled in-furnace cutting block, improves the efficiency of carrying out work, shortens the work period, and saves labor. An object of the present invention is to provide a reactor demolition apparatus that can be used.
[0005]
[Means for Solving the Problems]
A nuclear reactor demolition apparatus according to the present invention includes an elevator lift extending from a lower part of a biological shielding wall in a nuclear reactor to an upper work floor, and a cutting mast erected around the elevator lift in a circumferential direction thereof. At least one cutting scaffold provided so as to be rotatable and conforming to the shape of the inner wall surface of the biological shielding wall, and attached to the guide rail of the cutting scaffold and moved along the guide rail A cylinder device that is made flexible and expandable toward the inner surface of the living body shielding wall, and is rotatably supported by the distal end rod of the cylinder device and is elastically supported to change the cutting work position; A cutting blade capable of cutting work in a horizontal direction, a vertical direction or an inclined direction, and a core mounted on the tip of the cylinder device for cutting a vertical hole. A cutting block that is mounted between a cutting rail composed of a bit and a guide rail of the cutting scaffold, moves up and down along the guide rail, and is edge-cut by the cutting device from the living body shielding wall while leaving one surface. With respect to the main cylinder, a main cylinder for moving the storage portion toward and away from the inside of the biological shielding wall, an auxiliary cylinder for changing the elevation angle of the main cylinder, and the main cylinder. A block cut from the living body shielding wall, comprising: a second auxiliary cylinder that changes the holding angle of the storage portion; a claw attached to the tip of the storage portion; and a claw cylinder for rotating the claw. And a recovery device that recovers after leveling.
[0006]
As described above, according to the reactor dismantling apparatus according to the present invention, since the recovery device recovers the cutting block in the storage unit after leveling the cutting block, the cutting block can be stably held. Moreover, the cutting device can be quickly moved to the next cutting location by the cutting scaffold that can be pivotably moved in the circumferential direction of the cutting mast, and the cutting location can be easily moved. Furthermore, the cutting block can be automatically carried out from the collection device by an elevator lift or the like, and automation of cutting and dismantling work of the biological shielding wall can be realized.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a reactor demolition apparatus according to the present invention. In the figure, reference numeral 10 is a biological shielding wall, 11 is an activation unit, 12 is a reactor demolition device, 13 is an elevator lift, 14a and 14b are transport devices, 15 is a cutting mast, 16 is a cutting scaffold, 17 Indicates a cutting device, and 18 indicates a recovery device.
[0008]
A reactor demolition apparatus 12 according to the present invention is centered on an elevator lift 13 extending from a lower part in a biological shielding wall 10 to an upper work floor in a nuclear reactor, and a cutting mast 15 erected around the elevator lift 13. And at least one cutting scaffold 16 that is provided so as to be pivotable in the circumferential direction and is formed along the shape of the inner wall surface of the biological shielding wall 10, and is movable to the guide rail 16 a of the cutting scaffold 16. It comprises a cutting device 17 and a recovery device 18 that are attached to the device.
[0009]
Furthermore, the detail of each component of the reactor demolition apparatus 12 is demonstrated. As shown in FIGS. 1 and 2 of the drawings, the elevator lift 13 is constructed by assembling a rectangular cutting mast 15 around it and having an elevating basket 13a therein. Further, a conveying device 14a provided with a plurality of roller conveyors (not shown) is provided at the lower part of the elevating basket 13a, and a conveying device 14b provided with a plurality of roller conveyors (not shown) is provided above the elevating cage 13a. .
[0010]
The said conveying apparatus 14a conveys the cutting block 19 conveyed by the trolley etc. outside a figure with a roller conveyor, and carries it to the raising / lowering basket 13a. Moreover, the said conveying apparatus 14b transfers the cutting block 19 lifted with the said raising / lowering basket 13a to the container 21 in the working chamber 20 sealed with the green house etc. As shown in FIG.
[0011]
As shown in FIGS. 1 to 2, the cutting scaffold 16 has a steel frame 16b having a shape substantially parallel to the inner wall surface 10a of the biological shielding wall 10 of the nuclear reactor, and is laid circularly through a rotator. Assembled on the rail 22 and provided at least one or more around the cutting mast 15, in this embodiment two pairs.
[0012]
The two pairs of steel frames 16b are supported by a support ring 23 provided at a substantially central portion of the cutting mast 15 and a rail 22 provided at a lower end of the cutting scaffold 16, and are provided so as to be rotatable in the circumferential direction. . Teeth are engraved on the peripheral surface of the support ring 23, and when a rotating gear (not shown) of the steel frame 16b meshed with the teeth is rotated by a drive motor (not shown), the cutting mast 15 The steel frame 16b of the cutting scaffold 16 is pivoted on the rail 22 around the center.
[0013]
Next, the cutting device 17 will be described. 1, 2, and 7, the cutting device 17 is mounted on a guide rail 16a of the steel frame 16b, and is movable along the guide rail 16a by driving a motor. It consists of a cylinder device 17a that can be expanded and contracted toward the inner surface 10a of the shielding wall, and a cutting blade 17b that is rotatably supported by a tip rod of the cylinder device 17a.
[0014]
The blade 17b can change the cutting work position by the expansion and contraction action of the cylinder device 17a, and when the cylinder device 17a is rotated about the support shaft with respect to the base 17c, the cutting blade 17b is also rotated, and the horizontal direction Cutting work in the vertical direction or in the inclined direction becomes possible.
[0015]
Further, a core bit 31 for cutting a hole in the vertical direction (not shown) is also attached to the tip of the cylinder device 17a. The blade 17b cuts the living body shielding wall 10 in a horizontal dimension and a vertical direction with a predetermined size, and then continuously drills a number of holes in the vertical direction with the core bit 31 and cuts from the living body shielding wall 10. The block 19 is trimmed (see FIG. 3).
[0016]
The recovery device 18 is mounted between the guide rails 16a and 16a of the steel frame 16b as shown in FIGS. 3 to 7 and is driven by a motor or the like to move up and down along the guide rail 16a. The recovery device 18 includes a storage unit 24 for recovering the cutting block 19 cut from the biological shielding wall 10 and a main cylinder 25 for moving the storage unit 24 toward and away from the inner side of the biological shielding wall 10. An auxiliary cylinder 26 that changes the elevation angle of the main cylinder 25, a second auxiliary cylinder 27 that changes the holding angle of the storage portion 24 relative to the main cylinder 25, and a claw 28 that is a claw device attached to the tip of the storage portion 24; A claw cylinder 29 for rotating the claw is provided.
[0017]
The cutting block 19 cut and collected from the living body shielding wall 10 is transported to the lower part of the steel frame 16b by the collecting device 18, and is temporarily placed on a cage (not shown) placed on the roller conveyor.
[0018]
The cutting block 19 that has been transported is transferred onto the transport device 14 a and transported to the container 21 in the work chamber 20 via the elevator lift 13. The cutting device 17, the recovery device 18, the elevator lift 13, and the transport devices 14 a and 14 b are also operated by remote operation from a work chamber 20 installed on the work floor.
[0019]
In order to use the reactor demolition apparatus thus formed, first, the cutting mast 15 and the lifting cage 13a are assembled in the living body shielding wall 10 to form the elevator lift 13, and the rail 22 is laid. And after installing the conveying apparatuses 14a and 14b and the truck, the cutting device 17 and the collection | recovery apparatus 18 are set to the steel frame 16b.
[0020]
Next, the cutting device 17 is moved to the cutting position by remote operation, and the cutting blade 17b is rotated to cut the activation portion 11 of the biological shielding wall 10 in the vertical direction and the horizontal direction. In this cutting operation, first, a cutting operation in the vertical direction is performed on the inner surface 10a of the biological shielding wall 10. At this time, the cutting blade 17b is rotated while moving the cutting device 17 of the cutting scaffold 16 along the guide rail 16a to cut to a predetermined depth. Then, the cutting operation in the vertical direction is gradually deepened and performed a plurality of times to a predetermined activation depth.
[0021]
When the cutting operation in the vertical direction is completed, the cylinder device 17a of the cutting device 17 of each steel frame 16b is rotated about 90 ° about its axis, and the cutting blade 17b is leveled. Then, each steel frame 16b is rotated around the cutting mast 15 while rotating the cutting blade 17b. Thereby, a single horizontal cutting line is formed on the inner surface 10a of the biological shielding wall.
Further, the cutting depth is further increased and the above-described horizontal cutting operation is performed a plurality of times until the cutting depth reaches a predetermined depth.
[0022]
In this way, a cutting line is formed in a U shape on the entire inner surface 10a of the biological shielding wall in a horizontal direction and a vertical direction, leaving a vertical side.
[0023]
Further, the back surface of the cutting block 19 cut in a U-shape is provided with a core bit 31 attached to the cutting device 17, and then a continuous hole is drilled in the core bit 31 parallel to the biological shielding wall 10 as shown in FIG. Then, the cutting block 19 is trimmed from the living body shielding wall 10 while leaving one surface.
[0024]
As shown in FIGS. 3 and 7, the storage unit 24 of the recovery device 18 is moved closer to the cutting block that is edge-cut from the living body shielding wall 10 so as to leave one surface by operating the main cylinder 25 or the like. The lower end flange portion 24 a of the storage portion 24 is set slightly below the lower end cutting line 30 of the cutting block 19. Thereafter, the remaining surface is cut by the cutting device 17, the claw 28 is operated by the claw cylinder 29, and the cutting block 19 is taken in along the storage portion 24.
[0025]
After the cutting block 19 is taken in along the storage part 24, the second auxiliary cylinder 27 is operated to level the cutting block 19 and the storage part 24 (see FIG. 5). Further, the main cylinder 25 and the auxiliary cylinder 26 are operated to move the cutting block 19 to a stable position of the collecting device 18. In this way, the cutting block 19 of about 2 mm can be stably held. The cutting operation is performed sequentially from the top of the biological shielding wall 10 toward the lower end as shown in FIG.
[0026]
When the recovery device 18 holds the cutting block 19, the recovery device 18 moves down along the guide rail 16 a, and transfers the recovered cutting block 19 to the lift cage 13 a of the elevator lift 13 by the transport device 14 a.
[0027]
In this way, the cutting block 19 is transferred by the elevator lift 13 to the container 21 in the working chamber 20 above the living body shielding wall 10 via the transfer device 14b. In this way, the cutting block 19 is repeatedly cut, collected, and carried out to sequentially dismantle the activation part 11 of the biological shielding wall of the nuclear reactor.
[0028]
In the above embodiment, the recovery device that rotates and collects the cutting block has been described. However, the lower end flange portion 24a may be inserted into the lower end groove of the cutting block to be recovered.
[0029]
The present invention is not limited to the above embodiments, and various design changes can be made based on the technical idea of the present invention.
[0030]
【The invention's effect】
As described above in detail, according to the reactor demolition apparatus according to the present invention, the elevator lift extending from the lower part in the biological shielding wall in the nuclear reactor to the upper work floor, and standing around the elevator lift. At least one or more cutting scaffolds provided so as to be rotatable in the circumferential direction around the cutting mast and formed along the shape of the inner wall surface of the biological shielding wall, and attached to the guide rails of the cutting scaffolds And a cylinder device that is movable along the guide rail and is extendable and contractible toward the inner surface of the biological shielding wall, and is rotatably supported by the distal end rod of the cylinder device and is extendably supported. The cutting work position is changed, and a cutting blade capable of cutting work in the horizontal direction, the vertical direction, or the inclined direction, and the upper and lower sides of the tip of the cylinder device A cutting device comprising a core bit mounted for cutting a drilling hole and a cutting device mounted between guide rails of the cutting scaffold and moving up and down along the guide rail. A storage part for collecting cutting blocks that are edge-cut by leaving one surface, a main cylinder for moving the storage part toward and away from the inside of the biological shielding wall, and an auxiliary for changing the elevation angle of the main cylinder A cylinder, a second auxiliary cylinder that changes a holding angle of the storage unit with respect to the main cylinder, a claw attached to a tip of the storage unit, and a claw cylinder for rotating the claw. because comprising a recovery unit for recovering from the horizontal block cut from the biological shield wall Te, and the cutting operation it is possible to stably hold carrying the cutting block Since yield operation is performed integrally, thereby improving the recovery efficiency.
[0031]
Since the said collection | recovery apparatus makes a cutting | disconnection block horizontal with a nail | claw apparatus and collect | recovers in a storage part, it can collect | recover safely from the inwardly inclined biological shielding wall.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a reactor demolition apparatus according to the present invention.
FIG. 2 is a perspective view showing an upper part of a cutting scaffold of the reactor demolition apparatus.
FIG. 3 is a side view showing a case where a cut block is received in the nuclear reactor demolition apparatus.
FIG. 4 is a rear view showing a case where a cut block is received in the nuclear reactor demolition apparatus.
FIG. 5 is a side view showing a case where a cut block is received in the nuclear reactor demolition apparatus.
FIG. 6 is a side view showing a case where a cut block is stored in a storage unit in a nuclear reactor demolition apparatus.
FIG. 7 is a perspective view showing a state in which the last cut surface of the block is cut with a disk cutter in the reactor demolition apparatus.
FIG. 8 is a side view showing a receiving state of cutting blocks at each part in the biological shielding wall in the reactor demolition apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Biological shielding wall 10a Inner surface 11 Activation part 12 Reactor demolition apparatus 13 Elevator lift 13a Lifting cage 14a, b Transfer apparatus 15 Cutting mast 16 Cutting scaffold 16a Guide rail 16b Steel frame 17 Cutting apparatus 17a Cylinder apparatus 17b Cutting blade 17c Base 18 Collection device 19 Cutting block 20 Work chamber 21 Container 22 Rail 23 Support ring 24 Storage portion 24a Lower end flange portion 25 Main cylinder 26 Auxiliary cylinder 27 Second auxiliary cylinder 28 Claw 29 Claw cylinder 30 Lower end cutting line 31 Core bit

Claims (1)

An elevator lift extending from the lower part of the biological shielding wall in the nuclear reactor to the upper work floor;
At least one cutting scaffold provided around the cutting mast standing around the elevator lift so as to be rotatable in the circumferential direction and formed along the shape of the inner wall surface of the biological shielding wall; ,
A cylinder device that is mounted on the guide rail of the cutting scaffold and is movable along the guide rail, and is expandable and contractible toward the inner surface of the biological shielding wall, and is rotatable on a tip rod of the cylinder device And a cutting blade that is supported in a telescopic manner to change the cutting work position and can perform cutting work in a horizontal direction, a vertical direction, or an inclined direction, and a vertical drilling hole at the tip of the cylinder device A cutting device comprising a core bit mounted for cutting;
A storage unit that is mounted between the guide rails of the cutting scaffold, moves up and down along the guide rails, and collects the cutting block that is edge-cut by the cutting device from the living body shielding wall, leaving one surface; A main cylinder for moving the storage portion toward and away from the inside of the biological shielding wall, an auxiliary cylinder for changing the elevation angle of the main cylinder, and a holding angle of the storage portion with respect to the main cylinder. The auxiliary cylinder, the claw attached to the tip of the storage portion, and the claw cylinder for rotating the claw, and collecting the block cut from the living body shielding wall after being leveled Equipment,
Reactor demolition device characterized by comprising:

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