JP4837582B2 - Radioactive solid waste cutting apparatus and radioactive solid waste cutting method - Google Patents

Description

  The present invention relates to a radioactive solid waste cutting device and a radioactive solid waste cutting method, and more particularly, to a radioactive solid waste cutting device and a radioactive solid waste cutting method for cutting radioactive solid waste in water.

  Conventionally, radioactive solid waste such as the used control rod 3a (see FIG. 5) and the spent fuel channel box 3b (see FIG. 6) has a very high radioactivity level and is stored in water. At this time, since the used control rod 3a is long and has a cross-shaped cross section, and the used fuel channel box 3b is long and box-shaped, storage efficiency is poor. Therefore, in order to increase the storage efficiency, the central joint portion of the used control rod 3a is cut into a long L-shaped piece having an L-shaped cross section, and the used fuel channel box is cut diagonally. A long L-shaped piece having an L-shaped cross section is formed, and a plurality of the L-shaped pieces are stacked and stored in a dedicated storage box and stored in a pool. Various techniques for cutting the used control rod 3a and the used fuel channel box 3b into L-shaped pieces have been proposed (see, for example, Patent Documents 1 to 4).

  In the above-mentioned Patent Document 1, the radioactive solid waste suspended by the hanging tool is moved in the vertical direction by the guide mechanism, whereby the radioactive solid waste is cut in the vertical direction by a cutting torch such as a plasma arc, and the L-shape. A highly radioactive solid waste cutting method and apparatus for making mold pieces is disclosed.

  Moreover, in the said patent document 2, the said radioactive solid waste is injected by injecting the high pressure water (water jet) which mixed the abrasive | polishing agent from the nozzle with respect to the radioactive solid waste fixed to the cut material holding | maintenance apparatus. A technique for cutting is disclosed. In the high radioactive solid waste cutting apparatus disclosed in Patent Document 2, the radioactive solid waste is made into an L-shaped piece by moving a nozzle for injecting high-pressure water (water jet) in the vertical direction.

  Further, in Patent Document 3, the radioactive solid waste is irradiated by irradiating the solid radioactive waste held by the transporting device movable in the vertical direction with laser light while jetting the assist gas from the cutting nozzle. A technique for cutting an object is disclosed. In the radioactive solid waste cutting system disclosed in Patent Document 3, the radioactive solid waste is made into an L-shaped piece by moving a transport device that holds the radioactive solid waste in the vertical direction.

  Patent Document 4 discloses a technique of cutting the spent fuel channel box into L-shaped pieces by an inner blade device arranged inside the spent fuel channel box. Specifically, the opposite corners of the spent fuel channel box are cut off by advancing and retracting the cutting blade of the inner blade device arranged inside the spent fuel channel box with a cylinder, so that the channel box is L-shaped. Cut into mold pieces.

JP-A 63-88500 JP-A-8-285996 JP 2003-28990 A JP 62-257093 A

  However, in the high radioactive solid waste cutting method and apparatus disclosed in Patent Document 1, the radioactive solid waste is cut by electric cutting such as a plasma arc, and therefore, the thick radioactive solid waste is cut. There is a problem that it is difficult and there is a limit to the radioactive solid waste that can be cut. Further, the underwater cutting apparatus for high radioactive solid waste disclosed in Patent Document 2 also cuts radioactive solid waste with high-pressure water (water jet), so that the cutting energy is weak and thick radioactive solid waste is removed. It was difficult to cut. Moreover, in the radioactive solid waste cutting system and cutting method disclosed in Patent Document 3, a facility for irradiating a high-energy laser beam is necessary to cut a thick radioactive solid waste, but it is practically used. Has not reached. Moreover, in the volume reduction processing method and apparatus for the spent fuel channel box disclosed in Patent Document 4, only the channel box in which the inner blade device can be disposed can be cut. As a result, Patent Documents 1 to 4 have a problem in that radioactive solid waste that can be cut is limited by the size and thickness of the radioactive solid waste.

  In addition, in Patent Document 1, gas is used when cutting radioactive solid waste using a plasma arc. Also in Patent Document 3, assist gas is used when cutting radioactive solid waste. Therefore, a partition wall for covering the apparatus in water is required and an off-gas treatment facility is required so that the influence of cutting using the gas described above does not reach other regions. As a result, there is a problem that a device for cutting radioactive solid waste becomes complicated. Moreover, in patent document 1 and patent document 3, since gas is used at the time of the cutting | disconnection of radioactive solid waste, the off-gas filter which makes the gas containing dross, a fume (metal vapor | steam), etc. which generate | occur | produce at the time of a cutting | disconnection clean state is provided. Required as a consumable. As a result, the work of replacing the off-gas filter becomes complicated, and there is a problem that the operator is exposed during the replacement.

  Furthermore, in the said patent document 2, since the high pressure water which mixed the abrasive | polishing agent was injected with respect to the radioactive solid waste, there existed a problem that the sludge-shaped secondary waste containing an abrasive | polishing agent generate | occur | produced.

  The present invention has been made to solve the above-described problems, and a radioactive solid waste cutting apparatus capable of cutting radioactive solid waste without being restricted by the size of the radioactive solid waste and An object of the present invention is to provide a method for cutting radioactive solid waste.

Means for Solving the Problems and Effects of the Invention

  In order to achieve the above object, the radioactive solid waste cutting apparatus of the present invention is a radioactive solid waste cutting apparatus for cutting radioactive solid waste in water, and fixes a storage box containing a plurality of radioactive solid wastes. Fixing means for cutting, a storage box fixed to the fixing means, a cutting means for cutting radioactive solid waste stored in the storage box with a band saw or a wire, and a moving means for moving the cutting means in a predetermined direction. I have.

  In the radioactive solid waste cutting device according to the present invention, as described above, the cutting means including the band saw or the wire is moved by the moving means, so that the size and thickness of the storage box and the radioactive solid waste are not restricted. The storage box and radioactive solid waste can be cut with a band saw or a wire. In addition, since a storage box and radioactive solid waste stored in the storage box can be cut mechanically using a band saw or a wire, a partition for covering a special device for generating gas or a cutting device is provided. There is no need. Thereby, a storage box and radioactive solid waste can be cut | disconnected with a simple structure. In addition, the need for periodic replacement of the off-gas filter, which is necessary when cutting with gas, is eliminated, and the risk of exposure by the operator is eliminated. Furthermore, since the storage box and radioactive solid waste stored in the storage box can be mechanically cut using a band saw or wire, the cutting energy is sufficient to cut the storage box and radioactive solid waste. There is no need to use an abrasive that can be cut and assists in cutting. As a result, it is possible to prevent generation of secondary waste containing abrasives. Furthermore, since it can cut | disconnect with the storage box in which several radioactive solid waste is accommodated with a band saw or a wire, the operation | work which takes in / out a radioactive solid waste from a storage box can be omitted, and cutting time can be reduced. .

  In the radioactive solid waste cutting apparatus, preferably, the moving means moves the cutting means in a plane whose vertical axis is the longitudinal direction of the radioactive solid waste and the storage box. If comprised in this way, a long radioactive solid waste and a storage box can be cut | disconnected in short length. Thereby, the transport container utilized when transporting the radioactive solid waste and storage box cut | disconnected in short length can be reduced in size. Further, by cutting the radioactive solid waste and the storage box into short pieces according to the storage facility and the receiving specification of the receiving destination, it can be stored in various storage facilities and receiving destinations.

  In this case, it is preferable that the long storage box set by the transport device and the radioactive solid waste stored in the storage box be fixed by the fixing means, and the storage box fixed by the fixing means and the storage box By repeatedly cutting the stored radioactive solid waste by the cutting means, the long storage box and the radioactive solid waste stored in the storage box are divided and cut into a predetermined length. If comprised in this way, the radioactive solid waste cutting device of this invention will be reduced in size and simplified by utilizing conveyance apparatuses, such as a crane currently installed in the pool etc. which store radioactive solid waste, and installation cost Can be reduced. In addition, by using the transfer device, it becomes easy to cut a long storage box and radioactive solid waste, and the working time is shortened.

  The radioactive solid waste cutting device according to the present invention is a radioactive solid waste cutting device for cutting radioactive solid waste in water, fixing the radioactive solid waste having an L-shaped cross section, and fixing to the fixing means A cutting means for cutting the radioactive solid waste having an L-shaped cross section with a band saw or a wire, and a moving means for moving the cutting means in a predetermined direction.

  In the radioactive solid waste cutting device according to the present invention, as described above, by moving the cutting means including the band saw or the wire by the moving means, the radioactive solid waste is not restricted by the size or thickness of the radioactive solid waste. Solid waste can be cut with a band saw or wire. Further, since the radioactive solid waste can be mechanically cut using a band saw or a wire, it is not necessary to provide a special device for generating gas or a partition wall covering the cutting device. Thereby, radioactive solid waste can be cut with a simple configuration. In addition, the need for periodic replacement of the off-gas filter, which is necessary when cutting with gas, is eliminated, and the risk of exposure by the operator is eliminated. Furthermore, since the radioactive solid waste can be mechanically cut using a band saw or a wire, it can be cut with sufficient cutting energy to cut the radioactive solid waste, and polishing that assists the cutting. There is no need to use agents. As a result, it is possible to prevent generation of secondary waste containing abrasives.

  In the radioactive solid waste cutting apparatus, preferably, the moving means moves the cutting means on a plane whose vertical axis is the longitudinal direction of the radioactive solid waste having an L-shaped cross section. If comprised in this way, a long radioactive solid waste can be cut | disconnected to a short length. Thereby, the transport container used when transporting the radioactive solid waste cut into a short length can be reduced in size. Further, by cutting the radioactive solid waste into a short length according to the storage facility and the receiving specification of the receiving destination, it can be stored in various storage facilities and receiving destinations.

  In this case, it is preferable that the long solid L-shaped radioactive solid waste set by the conveying device is fixed by the fixing means, and the radioactive solid waste cutting means having the L-shaped cross section fixed by the fixing means. By repeating the cutting by the above, the radioactive solid waste having a long L-shaped cross section is divided and cut into a predetermined length. If comprised in this way, the radioactive solid waste cutting device of this invention will be reduced in size and simplified by utilizing conveyance apparatuses, such as a crane currently installed in the pool etc. which store radioactive solid waste, and installation cost Can be reduced. In addition, by using the transport device, it becomes easy to cut a long radioactive solid waste, and the working time is shortened.

  The radioactive solid waste cutting method of the present invention is a radioactive solid waste cutting method for cutting radioactive solid waste in water, the step of fixing a storage box containing a plurality of radioactive solid wastes, and a band saw or wire. And a step of moving the cutting means including a predetermined direction, and a step of cutting the fixed storage box and the radioactive solid waste stored in the storage box with a band saw or a wire moved in the predetermined direction. ing.

  In the radioactive solid waste cutting method according to the present invention, as described above, by moving the cutting means including the band saw or the wire, the storage box and the radioactive solid waste are not restricted by the size and thickness of the storage box. Boxes and radioactive solid waste can be cut with a band saw or wire. In addition, since a storage box and radioactive solid waste stored in the storage box can be cut mechanically using a band saw or a wire, a partition for covering a special device for generating gas or a cutting device is provided. There is no need. Thereby, a storage box and radioactive solid waste can be cut | disconnected with a simple structure. In addition, the need for periodic replacement of the off-gas filter, which is necessary when cutting with gas, is eliminated, and the risk of exposure by the operator is eliminated. Furthermore, since the storage box and radioactive solid waste stored in the storage box can be mechanically cut using a band saw or wire, the cutting energy is sufficient to cut the storage box and radioactive solid waste. There is no need to use an abrasive that can be cut and assists in cutting. As a result, it is possible to prevent generation of secondary waste containing abrasives. Furthermore, since it can cut | disconnect with the storage box in which several radioactive solid waste is accommodated with a band saw or a wire, the operation | work which takes in / out a radioactive solid waste from a storage box can be omitted, and cutting time can be reduced. .

  In the radioactive solid waste cutting method, preferably, the step of moving the cutting means in a predetermined direction includes the step of moving the cutting means in a plane whose vertical axis is the longitudinal direction of the radioactive solid waste and the storage box. Yes. If comprised in this way, a long radioactive solid waste and a storage box can be cut | disconnected in short length. Thereby, the transport container utilized when transporting the radioactive solid waste and storage box cut | disconnected in short length can be reduced in size. Further, by cutting the radioactive solid waste and the storage box into short pieces according to the storage facility and the receiving specification of the receiving destination, it can be stored in various storage facilities and receiving destinations.

  In this case, preferably, the method further includes a step of setting a long storage box and radioactive solid waste stored in the storage box by the transport device. And, the step of setting the storage box by the transport device and the radioactive solid waste stored in the storage box, the step of fixing the storage box, the step of moving the cutting means in a predetermined direction, and a band saw or wire By repeating the cutting step, the storage box and the radioactive solid waste stored in the storage box are divided and cut into a predetermined length. If comprised in this way, a division | segmentation cutting | disconnection of a long storage box and radioactive solid waste will become easy by utilizing conveyance apparatuses, such as a crane currently installed in the pool etc. which store radioactive solid waste, and work. Reduce time.

  The radioactive solid waste cutting method of the present invention is a radioactive solid waste cutting method for cutting radioactive solid waste in water, and includes a step of fixing the radioactive solid waste having an L-shaped cross section, and a band saw or a wire. A step of moving the cutting means in a predetermined direction, and a step of cutting the fixed radioactive solid waste having an L-shaped cross section with a band saw or a wire moved in a predetermined direction.

  In the radioactive solid waste cutting method according to the present invention, as described above, the radioactive solid waste is not restricted by the size or thickness of the radioactive solid waste by moving the cutting means including the band saw or the wire. Can be cut with a band saw or a wire. Further, since the radioactive solid waste can be mechanically cut using a band saw or a wire, it is not necessary to provide a special device for generating gas or a partition wall covering the cutting device. Thereby, radioactive solid waste can be cut with a simple configuration. In addition, the need for periodic replacement of the off-gas filter, which is necessary when cutting with gas, is eliminated, and the risk of exposure by the operator is eliminated. Furthermore, since the radioactive solid waste is mechanically cut using a band saw or a wire, it is possible to cut the radioactive solid waste with a cutting energy sufficient to cut the radioactive solid waste. There is no need to use it. As a result, it is possible to prevent generation of secondary waste containing abrasives.

  In the radioactive solid waste cutting method, preferably, the step of moving the cutting means in a predetermined direction includes the step of moving the cutting means in a plane whose vertical axis is the longitudinal direction of the radioactive solid waste having an L-shaped cross section. Contains. If comprised in this way, a long radioactive solid waste can be cut | disconnected to a short length. Thereby, the transport container used when transporting the radioactive solid waste cut into a short length can be reduced in size. Further, by cutting the radioactive solid waste into a short length according to the storage facility and the receiving specification of the receiving destination, it can be stored in various storage facilities and receiving destinations.

  In this case, preferably, the method further includes a step of setting the radioactive solid waste having an elongated L-shaped cross section by the transfer device. Then, a step of setting the radioactive solid waste having an L-shaped cross section by the transfer device, a step of fixing the radioactive solid waste, a step of moving the cutting means in a predetermined direction, and a step of cutting with a band saw or a wire By repeating the above, the radioactive solid waste is divided and cut into a predetermined length. With this configuration, it becomes easy to divide and cut long radioactive solid waste by using an existing crane or other transport device in a pool for storing radioactive solid waste, and shorten the work time. To do.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a front view showing the overall configuration of the radioactive solid waste cutting apparatus according to the first embodiment of the present invention. 2 is a plan view schematically showing a clamp mechanism and a band saw unit of the radioactive solid waste cutting apparatus shown in FIG. 1, and FIG. 3 is a band saw unit of the radioactive solid waste cutting apparatus shown in FIG. FIG. FIG. 4 is a view for explaining a cutting method by the radioactive solid waste cutting apparatus shown in FIG. FIG. 5 is a perspective view showing a used control rod, and FIG. 6 is a perspective view showing a used fuel channel box. 7 and 8 are a perspective view and a plan view showing a storage box in which a plurality of L-shaped pieces are stored, respectively. FIG. 9 is a front view showing cutting positions of the L-shaped piece and the storage box. First, with reference to FIGS. 1-9, the structure of the radioactive solid waste cutting device 1 by 1st Embodiment is demonstrated.

  The radioactive solid waste cutting apparatus 1 according to this embodiment is configured to store a storage box 2 (see FIGS. 7 and 8) and an L-shaped piece 3 (see FIGS. 7 and 8) accommodated in the storage box 2 in water. It is a device that cuts at once. And the storage box 2 and the L-shaped piece 3 are cut | disconnected by the position of CUT1-5 by the radioactive solid waste cutting device 1 by this embodiment, and are divided into 6 as shown in FIG. Note that the number of divisions and the cutting position can be changed according to the storage facility and the receiving specifications of the recipient. The above L-shaped piece 3 has an L-shaped cross section obtained by cutting a long used control rod 3a (see FIG. 5) and a spent fuel channel box 3b (see FIG. 6) along the longitudinal direction (A direction). Is a long radioactive solid waste. As shown in FIGS. 7 and 8, the L-shaped piece 3 is stored in the storage box 2 in a state where a plurality of L-shaped pieces 3 are stacked. As shown in FIG. 7, a gripping piece 2 a in which a gripping hole 2 b is formed to be suspended by the gripping tool 4 a (see FIG. 1) of the platform crane 4 is provided on the upper portion of the storage box 2. . Therefore, the upper part of the L-shaped piece 3 accommodated in the storage box 2 is in an exposed state without being covered on all sides.

  And the radioactive solid waste cutting device 1 is installed in the pool 5 filled with water, as shown in FIG. 4, and is installed in the water depth position which considered radiation shielding sufficiently. As shown in FIG. 1, the radioactive solid waste cutting apparatus 1 mainly stores a frame 10 installed on an existing frame 5 a (see FIG. 4) in a pool 5 and a plurality of long L-shaped pieces 3. A clamp mechanism 20 for fixing the possible storage box 2, a band saw unit 30 for cutting the L-shaped piece 3 and the storage box 2, and a moving mechanism 40 for moving the band saw unit 30 are provided.

  The frame 10 is provided with a receiving container 50 for receiving a cut piece 6 cut by a band saw unit 30 described later, and a guide 60 for detachably guiding the receiving container 50.

  The clamp mechanism 20 is provided for fixing the storage box 2 and fixing the L-shaped piece 3 accommodated in the storage box 2. Specifically, the clamp mechanism 20 stores the long storage box 2 and the long L-shaped piece 3 housed in the storage box 2 so that the longitudinal direction (A direction) is a vertical axis. The box 2 and the L-shaped piece 3 are fixed. And this clamp mechanism 20 has the clamp part 20a arrange | positioned at the one side surface side of the storage box 2, and the clamp part 20b arrange | positioned at the other side surface side, as shown in FIG. The clamp portions 20a and 20b include clamps 21a and 21b that hold the storage box 2, clamp cylinders 22a and 22b that move the clamps 21a and 21b in the horizontal direction (B1 direction and B2 direction), and the clamp cylinder 22a, respectively. And 22b to which support frames 23a and 23b are attached. While the clamp 21a of the clamp part 20a is moved in the B1 direction and the clamp 21b of the clamp part 20b is moved in the B2 direction, the storage box 2 and the L-shaped piece 3 accommodated in the storage box 2 are fixed. Is done. At this time, a spacer may be inserted between the storage box 2 and the L-shaped piece 3 to assist in fixing the L-shaped piece 3. The clamp mechanism 20 is configured not to interfere with the band saw unit 30 even when a band saw unit 30 described later moves.

  The band saw unit 30 is moved in the B2 direction by a moving mechanism 40 described later, and cuts the L-shaped piece 3 and the storage box 2. As shown in FIG. 3, the band saw unit 30 is attached to a motor 31 serving as a driving source, a pair of frames 32 a and 32 b that are disposed to face each other with the clamp mechanism 20 interposed therebetween, and a pair of frames 32 a and 32 b. A pair of bearings 33a and 33b, a pair of pulleys 34a and 34b rotatably attached to the pair of bearings 33a and 33b, a band saw 35 attached to the pair of pulleys 34a and 34b, a pair of blade guides 36a and 36b. The motor 31 serving as a drive source includes a hydraulic motor or an electric motor provided with an insulating seal, and is attached to the lower surface of the frame 32a. The motor 31 moves in the guide groove 11 formed in the frame 10 so as not to interfere with the frame 10. The pair of frames 32a and 32b are connected by a connecting member (not shown) and are configured to move integrally. Further, the band saw 35 attached to the pulleys 34a and 34b rotates in the horizontal plane via the pulleys 34a and 34b that are rotated as the motor 31 is driven. The blade guides 36a and 36b change the direction so that the blade portion of the band saw 35 faces in the horizontal direction. The blade guides 36a and 36b are arranged at a predetermined interval and direct the blade portion of the portion corresponding to the storage box 2 fixed to the clamp mechanism 20 in the horizontal direction.

  The moving mechanism 40 is provided to move the band saw unit 30 described above in the B direction. The moving mechanism 40 moves sliders 41 a and 41 b attached to the frames 32 a and 32 b of the band saw unit 30, slide rails 42 a and 42 b laid on the frame 10, and frames 32 a and 32 b of the band saw unit 30. Drive mechanism that does not. Then, when the frames 32a and 32b are moved by a drive mechanism (not shown), the band saw unit 30 is moved to the slide rail 42a and the horizontal plane with the longitudinal direction (A direction) of the L-shaped piece 3 and the storage box 2 as the vertical axis. It is moved along B (direction B).

  Next, with reference to FIG. 4, the cutting method of the storage box 2 and the several L-shaped piece 3 accommodated in the storage box 2 is demonstrated. All of the following cutting operations are performed in the pool 5 filled with water.

  First, as shown to Fig.4 (a), the storage box 2 in which the L-shaped piece 3 was accommodated is taken out. The storage box 2 is stored in a storage box frame 5 b provided in the pool 5. When the holding tool 4a of the platform crane 4 is inserted into the holding hole 2b (see FIG. 7) of the storage box 2, the storage box 2 is suspended and stored by raising the holding tool 4a to a predetermined position. The box 2 is taken out from the storage box frame 5b.

  The storage box 2 taken out from the storage box frame 5b is positioned corresponding to the radioactive solid waste cutting device 1 installed on the existing frame 5a by moving the platform crane 4 as shown in FIG. 4 (b). Moved to. And as shown in FIG.4 (c), the storage box 2 is set to the radioactive solid waste cutting device 1 by moving down the holding | gripping tool 4a of the platform crane 4. As shown in FIG. Then, by driving the clamp cylinders 22a and 22b of the clamp portions 20a and 20b of the clamp mechanism 20 shown in FIG. 2, the clamp 21a of the clamp portion 20a is moved in the B1 direction and the clamp 21b of the clamp portion 20b is moved. By moving in the B2 direction, the storage box 2 and the L-shaped piece 3 inside the storage box 2 are fixed. At this time, fixing of the L-shaped piece 3 may be assisted by inserting a spacer (not shown) between the storage box 2 and the L-shaped piece 3 as necessary.

  Next, the motor 31 of the band saw unit 30 shown in FIG. 3 is driven to rotate the band saw 35 attached to the pulleys 34a and 34b. At this time, the portion of the band saw 35 corresponding to the storage box 2 fixed to the clamp mechanism 20 is turned by a pair of blade guides 36a and 36b so that the blade portion is oriented in the horizontal direction.

  Then, by driving a driving mechanism (not shown) of the moving mechanism 40, the band saw unit 30 is moved in the B2 direction. Specifically, as shown in FIG. 2, the band saw unit 30 is “before cutting” → “cutting” on the slide rails 42 a and 42 b along the direction B 2 while cutting the storage box 2 and the L-shaped piece 3. ”→“ After cutting ”. Thereby, the storage box 2 and the L-shaped piece 3 are cut | disconnected in the position of CUT1. In the present embodiment, the band saw unit 30 moves on a plane whose vertical axis is the longitudinal direction of the long storage box 2 and the L-shaped piece 3, so that the storage box 2 and the L-shaped piece 3 are cut into short pieces. The At this time, the storage box 2 and the cut piece 6 of the L-shaped piece 3 are accommodated in the accommodating container 50.

  When the cutting is completed, as shown in FIG. 4D, the cut piece 6 accommodated in the container 50 is taken out of the apparatus using a special tool (not shown).

  Subsequently, when the remaining storage box 2 and the L-shaped piece 3 are cut at the position of the CUT 2, as shown in FIG. 4 (e), the storage box 2 and the L-shaped piece 3 are formed in the same manner as described above. After the piece 3 is fixed, the storage box 2 and the L-shaped piece 3 are cut by moving the band saw unit 30. Then, the cut piece 6 is taken out of the apparatus. Thereafter, the same procedure is repeated, and the storage box 2 and the L-shaped piece 3 are cut at the positions of CUT3 to CUT5. When cutting at the positions of the CUTs 4 and 5, as shown in FIG. 4 (f), the side of the storage box 2 is missing and the storage box 2 and the L-shaped piece 3 cannot be fixed. The storage box 2 and the L-shaped piece 3 are appropriately fixed by setting a clamp auxiliary adapter (not shown) on the L-shaped piece 3. Further, as shown in FIG. 4G, the remaining piece 7 gripped by the gripping tool 4a of the platform crane 4 by cutting at the position of the CUT 5 is also the same as the cutting piece 6 by cutting at the positions of the CUT1 to CUT5. Moved out of the device.

  In the present embodiment, as described above, the band saw unit 30 including the band saw 35 is moved along the slide rails 42a and 42b, so that the size and thickness of the storage box 2 and the L-shaped piece 3 are not restricted. In addition, the storage box 2 and the L-shaped piece 3 can be cut with a band saw 35.

  Moreover, in this embodiment, since the storage box 2 and the L-shaped piece 3 accommodated in the storage box 2 can be cut mechanically using the band saw 35, it is disclosed in Patent Document 1 and Patent Document 3. It is not necessary to provide a partition for covering a special device or a cutting device for generating such a gas. Thereby, the storage box 2 and the L-shaped piece 3 can be cut | disconnected with a simple structure. In addition, the need for periodic replacement of the off-gas filter, which is necessary when cutting with gas, is eliminated, and the risk of exposure by the operator is eliminated.

  Furthermore, in this embodiment, since the storage box 2 and the L-shaped piece 3 housed in the storage box 2 can be mechanically cut using the band saw 35, the storage box 2 and the L-shaped piece 3 are It is possible to cut with a cutting energy sufficient to cut, and it is not necessary to use an abrasive that assists in cutting. As a result, it is possible to prevent generation of secondary waste containing abrasives.

  Furthermore, in this embodiment, since the whole storage box 2 in which a plurality of L-shaped pieces 3 are stored can be cut by the band saw 35, the work of taking the L-shaped pieces 3 out of the storage box 2 can be omitted. Cutting time can be reduced.

  Moreover, in this embodiment, the long L-shaped piece 3 and the storage box 2 are shortened by moving the band saw unit 30 on a plane whose longitudinal axis is the L-shaped piece 3 and the storage box 2. Can be cut. Thereby, the transport container utilized when transporting the L-shaped piece 3 and the storage box 2 cut | disconnected by the short length can be reduced in size. Further, by cutting the L-shaped piece 3 and the storage box 2 in a short length according to the storage facility and the receiving specification of the receiving destination, it can be stored in various storage facilities and receiving destinations.

  Moreover, in this embodiment, since the storage box 2 can be set in the clamp mechanism 20 using the platform crane 4 already installed in the pool 5, the radioactive solid waste cutting apparatus 1 is downsized and simplified, Costs can be reduced. Moreover, by using this platform crane 4, the cutting | disconnection operation | work of the long storage box 2 and the L-shaped piece 3 becomes easy, and working time is shortened.

(Second Embodiment)
FIG. 10 is a front view showing the overall configuration of the radioactive solid waste cutting apparatus according to the second embodiment of the present invention. FIG. 11 is a plan view schematically showing a clamp mechanism and a band saw unit of the radioactive solid waste cutting apparatus shown in FIG. Next, with reference to FIG.10 and FIG.11, the structure of the radioactive solid waste cutting device 100 by 2nd Embodiment is demonstrated. In the second embodiment, unlike the first embodiment, the radioactive solid waste cutting device 100 that cuts one or a plurality of L-shaped pieces 3 will be described, and the configuration other than the clamp mechanism is the same as that of the first embodiment. Since they are the same, the same reference numerals are given and the description thereof is omitted.

  As shown in FIG. 10, the radioactive solid waste cutting apparatus 100 according to the second embodiment mainly includes a frame 10, a clamp mechanism 120 that fixes a long L-shaped piece 3, and an L-shaped piece 3. A band saw unit 30 to be cut and a moving mechanism 40 for moving the band saw unit 30 are provided.

  The clamp mechanism 120 is provided to fix one or more L-shaped pieces 3. Specifically, the clamp mechanism 120 fixes the L-shaped piece 3 so that the longitudinal direction (A direction) of the long L-shaped piece 3 is a vertical axis. And this clamp mechanism 120 has the clamp part 120a arrange | positioned at the one side of the L-shaped piece 3, and the clamp part 120b arrange | positioned at the other side, as shown in FIG. The clamp portion 120a includes a clamp 121a having a shape equivalent to the concave portion 3a having an L-shaped cross section, and the clamp portion 120b includes a clamp 121b having a shape equivalent to the convex portion 3b having an L-shaped cross section. The clamp 121a of the clamp part 120a is provided with a pair of clamp side plates 124a facing each other so that the L-shaped piece 3 does not escape in the lateral direction (C direction). The clamp side plate 124a has a comb shape, and is formed so as to fit without interfering with the counterpart clamp 121b. The clamp portions 120a and 120b include clamp cylinders 122a and 122b that move the clamps 121a and 121b in the horizontal direction (B1 direction and B2 direction), and support frames 123a and 123b to which the clamp cylinders 122a and 122b are attached, respectively. have. Thereby, the clamp 121a of the clamp part 120a is moved in the B1 direction, and the clamp 121b of the clamp part 120b is moved in the B2 direction, so that one or a plurality of L-shaped pieces 3 can be fixed. It becomes. The clamp mechanism 120 is configured not to interfere with the band saw unit 30 even when the band saw unit 30 moves.

  Since the cutting method of the L-shaped piece 3 is the same as the cutting method of the storage box 2 containing the plurality of L-shaped pieces 3 according to the first embodiment, description thereof is omitted. In addition, the holding tool 104a of the platform crane 104 that suspends and moves the L-shaped piece 3 is configured to be able to hold the L-shaped piece 3 as shown in FIG.

  In the present embodiment, as described above, the band saw unit 30 including the band saw 35 is moved along the slide rails 42a and 42b, so that the size and thickness of the one or more L-shaped pieces 3 are regulated. Instead, the L-shaped piece 3 can be cut with a band saw 35.

  Also in the second embodiment, the same effect as in the first embodiment described above can be obtained.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, an example in which a storage box and an L-shaped piece are cut using a band saw has been described. However, the present invention is not limited thereto, and storage is performed using a wire in which diamond beads are arranged at an appropriate pitch. The box and L-shaped piece may be cut.

It is the front view which showed the whole structure of the radioactive solid waste cutting device which concerns on 1st Embodiment of this invention. It is the top view which showed typically the clamp mechanism and band saw unit of the radioactive solid waste cutting device shown in FIG. It is a perspective view of the band saw unit of the radioactive solid waste cutting device shown in FIG. It is a figure for demonstrating the cutting method by the radioactive solid waste cutting device shown in FIG. It is the perspective view which showed the used control rod. It is the perspective view which showed the spent fuel channel box. It is the perspective view which showed the storage box in which the some L-shaped piece was accommodated. It is the top view which showed the storage box in which the some L-shaped piece was accommodated. It is the front view which showed the cutting position of the L-shaped piece and the storage box. It is the front view which showed the whole structure of the radioactive solid waste cutting device which concerns on 2nd Embodiment of this invention. It is the top view which showed typically the clamp mechanism and band saw unit of the radioactive solid waste cutting device shown in FIG.

Explanation of symbols

1,100 radioactive solid waste cutting device 20,120 clamp mechanism (fixing means)
30 Band saw unit (cutting means)
35 Band saw 40 Moving mechanism (moving means)

Claims (12)

A radioactive solid waste cutting device for cutting radioactive solid waste in water,
Fixing means for fixing a storage box containing a plurality of the radioactive solid wastes;
Cutting means for cutting the storage box fixed to the fixing means and radioactive solid waste stored in the storage box with a band saw or a wire;
A radioactive solid waste cutting apparatus comprising: moving means for moving the cutting means in a predetermined direction.   The radioactive solid waste cutting apparatus according to claim 1, wherein the moving means moves the cutting means on a plane whose vertical axis is the longitudinal direction of the radioactive solid waste and the storage box.   The long storage box set by the transport device and the radioactive solid waste stored in the storage box are fixed by the fixing means, and the storage box fixed by the fixing means and the storage box are stored in the storage box. The cutting of the radioactive solid waste by the cutting means is repeated, whereby the long storage box and the radioactive solid waste stored in the storage box are divided and cut into predetermined lengths. Item 3. A radioactive solid waste cutting apparatus according to Item 2. A radioactive solid waste cutting device for cutting radioactive solid waste in water,
Fixing means for fixing the radioactive solid waste having an L-shaped cross section;
A cutting means for cutting the radioactive solid waste having the L-shaped cross section fixed to the fixing means with a band saw or a wire;
A radioactive solid waste cutting apparatus comprising: moving means for moving the cutting means in a predetermined direction.   The radioactive solid waste cutting apparatus according to claim 4, wherein the moving means moves the cutting means on a plane whose longitudinal axis is the longitudinal direction of the L-shaped radioactive solid waste.   Fixing the long-shaped L-shaped radioactive solid waste set by the conveying device by the fixing means, and cutting the L-shaped radioactive solid waste fixed by the fixing means by the cutting means The radioactive solid waste cutting apparatus according to claim 5, wherein the radioactive solid waste having a long cross-sectional L shape is divided and cut into a predetermined length by repeating the above. A radioactive solid waste cutting method for cutting radioactive solid waste in water,
Fixing a storage box containing a plurality of the radioactive solid waste,
Moving a cutting means including a band saw or a wire in a predetermined direction;
Cutting the fixed solid storage box and the radioactive solid waste stored in the storage box with the band saw or the wire moved in the predetermined direction. Cutting method. The step of moving the cutting means in a predetermined direction includes:
The method for cutting radioactive solid waste according to claim 7, further comprising a step of moving the cutting means in a plane whose vertical axis is the longitudinal direction of the radioactive solid waste and the storage box. Further comprising the step of setting the long storage box and the radioactive solid waste stored in the storage box by a transport device;
A step of setting the storage box and radioactive solid waste stored in the storage box by the transport device; a step of fixing the storage box; a step of moving the cutting means in a predetermined direction; The radioactive solid according to claim 8, wherein the storage solid and the radioactive solid waste stored in the storage bin are divided and cut into a predetermined length by repeating the step of cutting with a wire. Waste cutting method. A radioactive solid waste cutting method for cutting radioactive solid waste in water,
Fixing the radioactive solid waste having an L-shaped cross section;
Moving a cutting means including a band saw or a wire in a predetermined direction;
Cutting the fixed radioactive solid waste having the L-shaped cross section with the band saw or the wire moved in the predetermined direction, and cutting the radioactive solid waste. The step of moving the cutting means in a predetermined direction includes:
11. The radioactive solid waste cutting method according to claim 10, further comprising a step of moving the cutting means in a plane whose longitudinal axis is the longitudinal direction of the L-shaped radioactive solid waste. Further comprising the step of setting the radioactive solid waste having a long L-shaped cross section by means of a conveying device;
In the step of setting the radioactive solid waste having the L-shaped cross section by the transport device, the step of fixing the radioactive solid waste, the step of moving the cutting means in a predetermined direction, and the band saw or the wire The radioactive solid waste cutting method according to claim 11, wherein the radioactive solid waste is divided and cut into a predetermined length by repeating the cutting step.

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