JP3741676B2 - Method of accommodating cylindrical container in drum can - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for transporting and storing a solid waste, particularly radioactive miscellaneous solid waste generated in a nuclear facility, etc., and storing a molten cylindrical container in a drum can, and an upper cover for the cylindrical container used therefor .
[0002]
[Prior art]
Of the low-level radioactive waste generated at nuclear power plants, miscellaneous solid waste is buried in a predetermined burial site. The waste is buried in a drum that is packed in a drum can and filled with mortar in the gap. Since the burial site is limited, it is preferable to reduce the number of drum cans embedded by reducing the volume of waste and to increase the amount of miscellaneous solid waste contained in the drum cans.
[0003]
As a volume reduction method of waste, there is a method using a melting furnace by high frequency induction heating. In this method, a canister having a circular cross section having an outer diameter smaller than the inner diameter of the drum can is prepared, and a canister previously filled with waste is set in a high frequency melting furnace to melt the contents. When the waste melts and reduces the volume, the canister has room, so if enough melt is generated in the canister by adding the waste and repeating the treatment, the canister is allowed to cool and solidify, and the canister is lifted to form a drum can It is then transported to and suspended in a drum, and a solidified material such as mortar is filled in the gap around the canister to form a waste.
[0004]
In order to efficiently fill a drum can having a circular cross section, it is preferable that the outer diameter of the canister be made as close as possible to the inner diameter of the drum can. However, since the wire rope is used to suspend the canister from the drum can, there is a need for a margin enough for the wire rope and its knot to enter, and this limits the capacity of the canister.
Also, when hanging several wire ropes, the wire ropes squeeze and hit the upper edge of the canister, but because the canister is weakened by high temperature processing, the edge of the canister that the wire rope hits may collapse. May be damaged.
[0005]
In JP-A-11-271696, as a drum packing method that does not use a wire rope, a drum can is tilted by a tumbling device in a state where a cylindrical canister in which contents are melted and solidified is placed on a transfer device. After inserting the tip of the guide member inclined at the same angle into the inlet, the cylindrical container conveyed from the transfer device is placed on the guide member, and the cylindrical container is fed into the drum can together with the guide member. Thus, a drum packing method is disclosed. According to this method, it is said that the outer dimension of the cylindrical container accommodated with respect to the diameter of the drum can can be maximized.
[0006]
The apparatus used for the drum packing method of the cylindrical container is provided with a moving / lifting device for chucking the cylindrical container on the transfer device and transporting and mounting it on the overturning device. A chuck unit is provided that is detachable from the cylindrical body and can be tilted by gripping the cylindrical body.
The chuck part can be moved and moved up and down by chucking the outer wall weakened by high temperature processing of the extremely heavy canister with a weight of about 600 kg including the contents, and the canister can be tilted according to the tilted drum can Must be configured.
Such a chuck portion needs to include an expensive mechanism capable of precise and advanced control that adjusts the gripping pressure to such an extent that the canister is not damaged, or tilts the canister while holding the canister at a predetermined angle.
[0007]
[Problems to be solved by the invention]
Therefore, the problem to be solved by the present invention is to provide a method for storing a larger cylindrical container in a drum can more safely using a simpler apparatus, and an upper lid for a cylindrical container used to implement the method. It is.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the method for accommodating a cylindrical container of the present invention in a drum can has a diameter larger than the diameter of the cylindrical container when the cylindrical container packed with miscellaneous solid waste is accommodated in the drum can. Prepare a thin lid and an upper lid with a jig that can handle a conveyor such as a handle that hangs a crane and a handle that hangs a crane suspension, and put the upper lid on the target cylindrical container, and prepare the band Hold the cylinder from the bottom of the cylindrical container and fasten it with the upper lid restraining device, hang a lifting tool on the handle of the upper lid, lift it to the drum can position, and store the cylindrical container in the upright drum can. The upper lid is removed by releasing the engagement.
[0009]
According to the housing method of the present invention, a cylinder container is lifted by hanging a crane lifting tool, which is also used in the prior art, on a handle of an upper lid, and then dropping the cylinder container into an opening of an upright drum can as it is. Is stored in a drum. Therefore, the cylindrical container can be accommodated in the drum can without using a complicated mechanism.
Moreover, since the cylindrical container is suspended from the upper lid using a thin band, the amount of miscellaneous solid waste stored in the cylindrical container can be increased by narrowing the gap between the cylindrical container and the drum can.
[0010]
In addition, since the edge of the top lid is larger than the outer periphery of the cylindrical container, even if the band is fixed to the binding device, excessive force can be applied to the weakened edge of the cylindrical container to break or damage the edge. Absent.
Also, instead of pressing and gripping the outer wall of the cylindrical container with the chuck surface, the band is hung so as to be held from the bottom of the cylindrical container, so it is strong against the wall surface even if heavy contents are accommodated in the cylindrical container It can be safely held with a simple mechanism without exerting force.
[0011]
In the housing method of the present invention, various types of air chucks, oil chucks, electric chucks, etc. can be used as the band engaging mechanism of the binding device. A binding device including a rotation driving device that drives the rotating body may be provided on the upper surface of the upper lid, and the end of the band having magnetic permeability may be wound around and gripped by the binding device.
In a binding device using an electromagnet rotating body, the end of the magnetic permeable band is stopped at the electromagnet portion and the rotating body is wound up more than one turn, so that the band can be easily and securely bound by the tension and magnetic force applied to the band. It is fixed to the vessel.
[0012]
Further, it is preferable to provide a guide groove deeper than the thickness of the band at a position where the cylindrical container sits on the upper surface of the cradle of the moving mechanism for inserting the cylindrical container into the high frequency melting furnace. If such a cradle is used to pass the band through the guide groove under the cylindrical container after the miscellaneous solid waste in the cylindrical container has melted and solidified, the band will not be exposed to high heat, so there is no risk of deterioration. Bands can be made of various materials.
[0013]
Further, the inner diameter is slightly larger than the outer diameter of the cylindrical container, and the ring application device includes a ring that moves up and down along the outer wall, and lifts the ring so that the band stands up against the outer wall of the cylindrical container. You may make it prepare.
By using such a band application device, the end point of the band can be surely captured by the binding device, so that the device can be automated.
[0014]
In addition, a thin support plate is prepared to be inserted along the inner wall of the drum can. When the cylindrical container is stored in the drum can, the support plate is inserted between the cylindrical container and the drum can, and the cylindrical container is placed at the bottom of the drum can. The drum can is tilted without supporting it, and the cylindrical container is supported on the support plate, the band is pulled out and the cylindrical container is lowered to reach the bottom, and then the drum can is returned to the upright state to support the plate. You may make it pull out.
By collecting the band in this way, it is possible to prevent an unnecessary increase in volume during the processing of the miscellaneous solid waste, and to reuse the expensive band to ensure economic efficiency.
[0015]
Moreover, the upper lid used for carrying out the method for housing the cylindrical container of the present invention in the drum can has a larger diameter than the diameter of the cylindrical container, includes a binding device for fixing the band, and further has a crane suspension on the upper surface. It is characterized by having a handle for hanging.
The binding device preferably grips the band so that the band that suspends the cylindrical container extends near the outer wall of the cylindrical container and does not exert a force on the wall.
By using such an upper lid, it is possible to maximize the capacity of the cylindrical container by gripping with a thin band and giving the drum can the maximum diameter, so that the cylindrical container is held from the bottom. By doing so, a cylindrical container having a large weight can be supported by a simple mechanism, and the waste treatment can be safely performed without damaging the weakened wall.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail by way of examples.
FIG. 1 is a process diagram for explaining an implementation procedure of a method for accommodating a cylindrical container in a drum can in this embodiment.
As shown in FIG. 1 (a), two wide thin bands 1 are laid in a cross shape on a cradle 2 and are melted and solidified by a wire or the like as shown in FIG. 1 (b). A cylindrical container 3 such as a canister after processing is suspended and transported by a crane or the like, and suspended and placed on the band 1.
[0017]
There is also a method in which a cylindrical container 3 such as a canister before melting treatment is placed on a receiving table 2 and introduced into a melting furnace as it is to perform a melting and solidifying treatment. This method has an advantage that the risk of breakage is reduced because the wire is hung on the cylindrical container before weakening.
However, since the band 1 is also brought into the melting furnace and receives a certain amount of heat, it is necessary to select a material such as stainless steel that does not deteriorate by heat so that the band can maintain the strength to withstand the suspension of the cylindrical container. There is.
[0018]
Next, as shown in FIG. 1 (c), the band 1 is raised along the surface of the cylindrical container 3, and the tip is lifted above the edge 31 of the container. As shown in FIG. It fixes to each of the binding device 41 provided on the upper cover 4 applied from the top of the container 3. For fixing the band 1, various methods such as fixing with a screw or hydraulic pressure and engagement with a hook can be used.
[0019]
Thereafter, a handle 42 provided at the center of the upper surface of the upper lid 4 is hung and transported by hanging on a crane suspension 5, and the cylindrical container 3 is fed into the drum can 6 as shown in FIG. Suspend until it reaches.
Finally, as shown in FIG. 1 (f), the band 1 is removed from the binding device 41, the upper lid 4 is collected, and the cylindrical container 3 is disposed together with the drum can 6. The band 1 remaining in the drum can 6 is disposed together with the cylindrical container 3.
[0020]
FIG. 2 is a side sectional view showing a state in which the cylindrical container 3 is lifted by a crane suspension 5.
Since the diameter of the upper lid 4 is about the diameter of the cylindrical container 3 or larger than the diameter, the band 1 is hung so as to hold the bottom of the cylindrical container 3 and is fixed to the upper binding device 41 through the side edge of the upper lid 4. Then, since the band 1 extends along the side wall 31 of the cylindrical container 3, the band 1 does not bite into or press on the wall. Therefore, even if the surface of the cylindrical container 3 is weakened by being exposed to high heat, the cylindrical container 3 is not crushed or deformed by being pushed by the band 1. In particular, the upper edge 32 of the side wall 31 becomes brittle and easily collapses, but is protected by the upper lid 4 and can be accommodated in a drum can without being damaged.
[0021]
In the housing method of the present embodiment, there is only a gap between the outer wall of the cylindrical container 3 such as a canister and the inner wall of the drum can 6 that accommodates the canister. Can be used. Since the cylindrical container 3 is lifted so that the band 1 is held on the bottom, unlike the case of gripping with the chuck of the prior art, the side wall 31 does not receive an action force from the band 1, so the side wall has a high strength. The thickness required for the melt-solidification operation may be provided. Therefore, the capacity of the container can be sufficiently increased.
[0022]
FIG. 3 is a process diagram illustrating another method of setting a band.
In order to set the band 1 more easily, a guide groove 21 deeper than the thickness of the band may be provided on the upper surface of the cradle 2 as shown in FIG. As shown in FIG. 3 (b), after placing the cylindrical container 3 on the cradle 2, charging the miscellaneous solid waste into the container and melting and cooling and solidifying it, below the cylindrical container Through the band through the guide groove 21, the band 1 is pulled up above the upper end edge 32 of the cylindrical container 3 as shown in FIG. After that, the same procedure as described with reference to FIG.
In this way, when the cradle 2 having the guide groove 21 is used and the band 1 is passed through the guide groove 21 below the cylindrical container after the miscellaneous solid waste in the cylindrical container 3 is melted and solidified, the treatment is performed. Since the band 1 is not exposed to high heat and does not deteriorate, the band 1 can be made of various materials such as nylon cloth. In addition, there is an advantage that preparation before charging into the melting furnace is simplified.
[0023]
FIG. 4 is a process diagram for explaining one method used when the band is recovered together with the cylindrical container without being disposed of.
A thin support plate 61 that can be inserted along the inner wall of the drum 6 is prepared. The support plate 61 has a thickness slightly larger than the thickness of the band 1, a width slightly smaller than ¼ of the inner periphery of the drum can 6, and a length substantially the same as the depth of the drum can 6. In addition, it is preferable that the end of the support plate 61 comes out when inserted into the drum can 6 and can be pulled out by grasping the end.
[0024]
As shown in FIG. 4A, the support plate 61 is inserted along the inside of the side wall of the drum can 6, and the cylindrical container 3 is stored in the drum can 6 as shown in FIG. 4B. At this time, the support plate 61 comes to a position sandwiched between the adjacent bands 1 of the cylindrical container 3 so as not to overlap the band 1.
Then, as shown in FIG. 4C, the drum can 6 is tilted so that the support plate 61 is located before the cylindrical container 3 reaches the bottom of the drum can 6.
[0025]
At this time, since the cylindrical container 3 is supported on the support plate 61 and the band 1 is floating from the inner wall of the drum, the band 1 is grasped and pulled out.
After pulling out the band 1, the cylindrical container 3 is lowered to reach the bottom of the drum can 6, and the drum can 6 is returned to the upright state as shown in FIG. The opened support plate 61 is pulled out.
By collecting the band in this way, it is possible to prevent an unnecessary increase in volume during the processing of the miscellaneous solid waste, and to reuse the expensive band to ensure economic efficiency.
[0026]
FIG. 5 shows the accommodation procedure when part of the procedure is mechanized.
As shown in FIG. 5A, the band 1 is placed on the cradle 2 and the cylindrical container 3 is placed thereon. Then, as shown in FIG. 5 (b), the band raising tool 22 evacuated to the side of the cradle 2 rises along the surface of the cylindrical container 3, and the band 1 is moved to the surface of the cylindrical container 3. Launch along with. The tip of the band 1 protrudes above the upper end edge 31 of the cylindrical container 3.
Therefore, as shown in FIG. 5 (c), the upper lid 4 is put over and the band binding devices 41 are fixed with the tips of the bands 1 sandwiched therebetween. The cylindrical container 3 is lifted by hanging a crane suspension 5 on a handle 42 of the upper lid 4 and suspended in a drum can 6 for storage.
[0027]
The binding device 41 needs to be able to be gripped strongly so that it does not come off even when the cylindrical container is lifted using, for example, a hydraulically driven chuck.
Further, the band raising tool 22 can be driven by a hydraulic cylinder or a pneumatic cylinder.
If it comprises as shown in FIG. 5 and the band raising tool 22 and the binding device 41 on the upper cover 4 can be operated remotely, mechanization is possible and the apparatus can be automated.
[0028]
6 to 9 are diagrams for explaining another example of the band binding device 41 in the upper lid 4. FIG. 6 is a side view of the use state, FIG. 7 is a plan view of the upper lid 4, and FIGS. 8 and 9 are conceptual diagrams for explaining how to use the binding device 41.
When the cylindrical container 3 is hung using two bands 1, four binding devices 41 are provided on the upper lid 4 so as to correspond to the ends of the two bands 1. The binding device 41 includes a rotary winder 44 including an electromagnet and a motor 45 that rotationally drives the rotary winder 44. The upper lid 4 is provided with a band through hole 43 through which the band 1 passes at a position corresponding to the rotary winder 44. The band 1 is formed of a magnetic material that reacts with a magnet. Since the magnetic material is hard and difficult to bend, it is necessary to provide the necessary flexibility by reducing the thickness to, for example, 0.5 mm or less.
[0029]
The rotary winder 44 is provided with an electromagnet on at least a part of its circumference and is rotated by a motor 45. As shown in FIG. 8, a flat surface is formed in a part of the circumference and an electromagnet is incorporated therein, and the tip of the band 1 protruding from the band through hole 43 by exciting the electromagnet is applied to the flat surface. And this is adsorbed and fixed. Therefore, when the band 1 is wound up by rotating the rotary winder 44 one or more times, the tip of the band 1 is wound into the band 1 and fixed as shown in FIG. The rotary winder 44 may be entirely composed of an electromagnet, or may be a cylindrical body having no flat surface if the strength of the magnet is appropriate.
When the cylindrical container 3 is lifted by hanging the handle 42 on the handle 42, the overlapping portion of the band 1 is more firmly fixed by the tension applied to the band 1.
[0030]
The motor 45 is provided with a brake or a ratchet mechanism to prevent reverse rotation at the time of winding so that the band 1 that has been wound up is not loosened.
After the cylindrical container 3 is inserted into the drum can, when the electromagnet is de-energized and the rotary winder 44 is rotated in the reverse direction, the band 1 is unwound and the upper lid 4 can be removed and recovered.
In addition, when the binding device 41 that grips one end of one band 1 is loosened and the upper lid 4 is pulled up while holding the other end, the band 1 that is unfastened on one end is on the other end. It can be recovered together with the upper lid 4 while being fixed to the binding device 41.
[0031]
FIG. 10 is a perspective view showing another structural example of the upper lid 4.
The upper lid 4 is provided with a hook 46 on the lower surface, and the band 1 having a ring 11 formed at the end thereof is used. The hook 46 is put in the ring 11 and the cylindrical container 3 is lifted.
The upper lid 4 has a very simple structure. However, since there is a ring 11 at the end of the band 1, it is difficult to use the band 1 after it is pulled out and reused.
[0032]
In the above embodiment, the case where the cylindrical container 3 is handled using two bands 1 has been described. However, the cylindrical container can be lifted more stably by increasing the number of bands. Even if only one band is used, it is sufficient depending on conditions. Thus, it goes without saying that even if the number of bands used increases or decreases, it is only necessary to prepare a binding device or the like correspondingly, and the configuration of the invention does not change.
[0033]
【The invention's effect】
As described above, when the method for accommodating the cylindrical container of the present invention in the drum can is used, a cylindrical container larger than the conventional one can be accommodated in the drum can by using a simple and inexpensive apparatus, which is economical and efficient. High-quality miscellaneous solid waste can be processed.
[Brief description of the drawings]
FIG. 1 is a process diagram for explaining a method of accommodating a cylindrical container in a drum can according to one embodiment of the present invention.
FIG. 2 is a side sectional view showing a suspended state of a cylindrical container in the present embodiment.
FIG. 3 is a process diagram illustrating another aspect of the embodiment.
FIG. 4 is a process diagram for explaining a mode of collecting a band in the present embodiment.
FIG. 5 is a process diagram illustrating an aspect in which a part of the procedure is mechanized in the present embodiment.
FIG. 6 is a side view illustrating a usage state of another example of the upper lid in the embodiment.
7 is a plan view of the upper lid of FIG. 6. FIG.
8 is a conceptual diagram illustrating a state in which a band is started to be put on the binding device of the upper lid of FIG. 6;
9 is a conceptual diagram illustrating a state in which a band is fixed by a binding device on the upper lid of FIG. 6. FIG.
FIG. 10 is a perspective view showing an upper cover of still another example in the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Band 11 Wheel 2 Base 21 Guide groove 22 Band raising tool 3 Cylindrical container 31 Side wall 32 Side wall upper end edge 4 Upper lid 41 Tightening device 42 Handle 43 Band through-hole 44 Rotating hoist 45 Motor 46 Hook 5 Hanging tool 6 Drum can 61 Support plate

Claims (5)

  A cylindrical container filled with miscellaneous solid waste is accommodated in a drum can, and has an upper lid having a diameter larger than that of the cylindrical container and fixing a band and a handle that can handle the transporting machine and a thin lid. Prepare a band, put the upper lid on the target cylindrical container, hang the band from the bottom of the cylindrical container, stop it with the binding device, hang the handle on the handle and lift it A method for housing a cylindrical container in a drum can, wherein the cylindrical container is transported to a drum can position, inserted into the upright drum can, and when stored, the band is disengaged and the upper lid is removed.   2. The cylindrical container according to claim 1, wherein the binding device includes a rotating body that is provided on an upper surface of the upper lid and at least a part of which is composed of an electromagnet, and a rotation driving device that drives the rotating body. Containment method.   A guide groove deeper than the thickness of the band is provided at a position where the cylindrical container sits on a cradle of a moving mechanism for inserting the cylindrical container into a high frequency melting furnace, and the miscellaneous solid waste in the cylindrical container is provided. 3. The cylindrical container receiving method according to claim 1, wherein the band is passed through the guide groove under the cylindrical container after being melted and solidified.   A device for applying the band to the pedestal so as to crawl the band so as to crawl the outer wall of the cylindrical container, wherein the inner diameter is slightly larger than the outer diameter of the cylindrical container and the ring is moved up and down along the outer wall. The cylindrical container housing method according to claim 3, further comprising:   Further, a thin support plate to be inserted along the inner wall of the drum can is prepared, and when the cylindrical container is stored in the drum can, the support plate is inserted between the cylindrical container and the drum can, and the cylindrical body The drum can is tilted and supported so that the cylindrical container is on the support plate in a state where the container does not reach the bottom of the drum can, and the drum can is returned to an upright state after the band is pulled out, and the support plate The cylindrical container receiving method according to claim 1, wherein the cylindrical body container is pulled out.

Images