JP2011080873A - Device for volume reduction treatment for radioactive waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an effective use of limited storage areas by giving volume reduction treatment to radio, active waste inside an airtight box such as a glove box and molding it into pieces of a certain form. <P>SOLUTION: A device includes a waste shredder 2 mounted in the glove box 1 and used to shred the radioactive waste; a receptacle 31 for holding an storage bag 5; a bag holder 3 comprising an LM guide placed, in order to support the receptacle 31 so that it can freely shuttle between the position p1, where shredded waste 4 is received and the position p2 where the shredded waste is compressed; a vacuum pump device 7, which receives the shredded waste from the waste shredder 2 at the position p1 where the shredded waste is received and decompresses the storage bag 5, by bleeding the air inside the filled storage bag 5, at the position p2 where the shredded waste is compressed, a compressor 6 which also compresses the storage bag with it included in the receptacle 31 in the position and the storage bag which is held by the receptacle 31 of the bag holder 3 to receive the shredded waste 4 and is used to store it, after filling it into the bag 5 and compressing it. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention treats a material to be processed inside a sealed box kept at a negative pressure, or a relatively low level of radioactive waste resulting from replacement of each part of the sealed box itself, in the sealed box. The present invention relates to a volume reduction treatment apparatus for radioactive waste that can be compressed and reduced in volume to be taken out.

  Radioactive waste discharged from nuclear facilities etc. is permanently stored by incineration or in a completely sealed state. Therefore, radioactive waste stored every year is increasing and storage costs are also increasing. Under these circumstances, it is easy to understand that it is necessary to reduce the volume of generated radioactive waste as much as possible to suppress an increase in the amount of storage.

  In a nuclear facility, in a negative pressure environment such as a glove box, a hood, or an airtight box, there is a case where a radioactive substance is processed or a device or a member in contact with the radioactive material is operated or processed. Therefore, in these sealed boxes, radioactive waste may be generated due to the processing inside them, and as described above, it is necessary to reduce the volume in order to suppress an increase in the storage amount. In addition, each part of the airtight box itself, for example, a globe, an exhaust filter, an inner ring or an airtight plug may need to be replaced. It becomes the radioactive waste similar to the radioactive waste generated inside. In addition, since such wastes such as gloves are more in quantity than the wastes generated from the objects to be treated, they are more important from the viewpoint of waste volume reduction treatment.

There are several proposals for volume reduction of this type of radioactive waste.
Patent Literature 1 relates to a radioactive waste compression volume reduction waste, a compression volume reduction processing method, and a compression volume reduction metal can.
Among them, the compressed volume reduction waste of radioactive waste is reduced in volume by compressing a metal can for compression reduction containing radioactive waste at a surface pressure of 25-60 MN / m ² under reduced pressure. The filling degree of the contents in the metal can for volume reduction is 85 vol% or more. In the above, the radioactive waste may be stored in the compression volume reducing metal can together with the binder.

  Among the above, in the method for compressing and reducing radioactive waste, the radioactive waste is stored in a compression-reducing metal can, and the compression-reducing metal can is compressed under reduced pressure into a compression-reducing container body. The volume is reduced. In addition, this processing method may be performed using the following metal cans for compression and volume reduction. Further, the compression-reduced waste material obtained may be disposed of by filling a disposal container.

  Among the above, the compression volume reduction metal can is a radioactive waste compression volume reduction metal can that contains radioactive waste and is compressed and volume reduced. A can lid portion for sealing the opening portion, and a peripheral wall portion is provided on the outer periphery of the can lid portion so as to surround at least the outer periphery on the opening portion side of the can body portion, thereby forming a double structure. The sealing portion of the opening of the can body portion by the can lid portion is provided with a leakage preventing means for preventing leakage of the radioactive waste to the outside during compression.

  The leakage prevention means includes a dust collecting filter provided so as to cover the opening of the can body, and a sealing material interposed between the periphery of the opening and the can lid. The can body portion may be provided with a fold that can be bent in the compression direction at the time of compression and volume reduction.

  The technique of Patent Document 1 is not used in a sealed space such as a glove box. Moreover, radioactive waste is simply packed in a metal container and compressed, and it cannot be said that the energy utilization efficiency is high. Furthermore, it is not suitable when plastics and rubbers are to be discarded.

Patent Document 2 relates to a radioactive waste disposal system.
This radioactive waste treatment and disposal system consists of a sorting process that sorts out very low level radioactive waste from radioactive waste generated from nuclear facilities, and a sorted very low level radioactive waste. Discriminating materials into metal and concrete, and further distinguishing between metal wastes with and without hollows, concrete wastes with block-like ones and others For the very low level radioactive waste that has been removed, the hollow metal waste is cut, volume-reduced or filled to eliminate the hollow, and the block concrete waste is surface-immobilized. Processing process for concrete waste of other shapes, crushing process, and very low level radioactive waste after processing Is housed in a container transport only transported to a predetermined embedding treatment plants, in which and a disposal burying disposal taken out from the container transport only in the treatment plants.

  In the above disposal process, the extremely low level radioactive waste that has been transported is taken out of the transport container and buried in a mobile burial facility with anti-scattering that holds the waste burial site at a negative pressure. In addition, the mobile burial equipment with anti-scattering structure is configured to cut off the burial work place from the outside, the transport vehicle entrance / exit, an exhaust device for holding the inside of the equipment at a negative pressure, exhaust gas There may be a filter installed on the upstream side of the apparatus and a mechanism for moving the equipment.

  Although the technology of this patent document 2 can reduce the volume of waste, it is very large-scale and reduces the volume of radioactive waste such as plastics and rubber generated in the glove box. Not suitable for.

Patent Document 3 relates to a cutting device for an inner ring for a glove box.
This glove box inner ring cutting device is a ring that holds the inner ring in the glove box inner ring cutting device that is installed in the glove box and cuts the inner ring in the glove box into an appropriate shape. A holding means, a fixed blade attached to be linked to the ring holding means, and a movable blade that moves forward and backward with respect to the fixed blade and partially overlaps the fixed blade when moving forward, and is held by the ring holding means. The inner ring is made to shear by applying a shearing force by the fixed blade and the movable blade.

The ring holding means includes a receiving plate on which the inner ring is placed in a state where the axial direction of the inner ring is the vertical direction, and the inner ring is inserted into the inner ring in the axial direction and holds the inner ring inside thereof. The fixed blade is connected to the ring holding member.
The ring holding means is configured to place and hold the inner surface of the inner ring on the fixed blade by inserting in the axial direction with the axial direction of the inner ring being substantially horizontal with respect to the inner ring. Sometimes it is.
In some cases, the fixed blade and the movable blade are arranged so that the shearing direction by the fixed blade and the movable blade is inclined with respect to the horizontal direction.
The movable blade may be swingable about one end of the movable blade as an axis.

  Although the technique of this patent document 3 can be used by being arranged in a glove box, it cannot be used other than the shearing of the inner ring. Further, since it cannot be sheared into fine fragments, the volume reduction rate cannot be said to be sufficient. In addition, no technique other than simply arranging and storing the shear piece in the storage space has been proposed.

JP 2002-340991 A Japanese Patent Laid-Open No. 04-291199 JP 2007-121070 A

  The present invention solves the above-mentioned problems of the prior art, and various radioactive wastes generated in an airtight box such as a glove box, in particular, a glove to be discarded generated in a relatively large amount due to the necessity of replacing each part of itself. An object of the present invention is to provide a volume reduction treatment apparatus for radioactive waste that can reduce the volume of radioactive waste such as an exhaust filter, an inner ring, or an airtight plug inside the glove box. In particular, for radioactive waste with high safety, it is possible to crush and collect radioactive waste made of such plastic and rubber materials as described above, and form it into a lump with a fixed shape with few voids inside. It is an object of the present invention to provide a volume reduction processing device.

1 of the present invention is a volume reduction treatment apparatus for radioactive waste, which is used by being installed in an airtight box and which treats radioactive waste generated from itself and a treatment product therein.
Means for crushing radioactive waste;
Compression means for compressing a storage bag that is held in a container part of the bag holding means and filled with crushed radioactive waste;
Bag holding that is arranged so as to reciprocate between a crushed material receiving position for receiving crushed material of the crushing means and a compressed position for compressing a storage bag filled with radioactive waste held inside by the compression means. A shape-retaining mold that holds the circumferential shape and bottom shape of the storage bag in its shape when the height of the storage bag filled with radioactive waste is compressed by the compression means. A bag holding means having a container portion also serving as
A vacuum pump device for sucking and exhausting the inside of the storage bag located at the compressed position in order to decompress the inside while being held in the container portion of the bag holding means;
A storage bag made of a plastic film having an outer diameter that can be inserted into the container portion of the bag holding means, and has a receiving port for receiving crushed material at the top, and the vacuum pump device on the inside of the peripheral side. Storage pipes each having an exhaust pipe portion for sucking and exhausting the air, and having a closing means on the receiving port and the exhaust pipe portion,
The volume reduction processing apparatus for radioactive waste comprised by this.

  According to a second aspect of the present invention, in the radioactive waste volume reduction processing apparatus according to the first aspect of the present invention, the crushing means includes a rotating drum, a plurality of projecting blades projecting on an outer periphery of the rotating drum, and an outer periphery of the rotating drum. A fixed blade that shears between the projecting blades that are disposed in close proximity to each other and that passes through the radioactive waste that is placed on the rotating waste drum as the rotating drum rotates, and a position directly above the fixed blades. , Pressing means for pressing the radioactive waste to be crushed against the outer periphery of the rotating drum, and setting of the crushed radioactive waste that is located below the rotating drum and the fixed blade and is crushed and dropped The discharge plate is configured to drop only a crushed material having a size smaller than that, and a hopper for guiding the crushed material that has been sieved and dropped from the discharge plate to the crushed material receiving position.

According to a third aspect of the present invention, in the volume reduction processing apparatus for radioactive waste according to the first or second aspect of the present invention, the bag holding means includes the container portion for holding the storage bag, and the container portion as the crushed material receiving position. In order to reciprocate between the position to be compressed, it is composed of a rail part arranged between them and a moving part arranged movably on the rail part,
The container portion is formed of a rigid member having a bottomed cylinder as a basic shape, and an upper receiving port is formed so as to expand upward, and an exhaust pipe portion of the storage bag or the vacuum pump is formed on a part of the peripheral side thereof. A passage opening for passing a suction tubular member extending from the apparatus is formed, and the moving portion is fixed to the bottom portion of the container portion, whereby the container portion is attached to the rail portion. It is arranged freely.

  A fourth aspect of the present invention is the radioactive waste volume reduction processing apparatus according to the first, second or third aspect of the present invention, wherein the compression means is held in a container portion of a bag holding means located at a compressed position. A pressing plate for compressing the containing bag filled with the crushed material, wherein the planar shape is the same as or similar to the trunk cross-sectional shape of the container part and is smaller than that of the container part; A shaft member having the pressing plate fixed to the lower end thereof, a support member for supporting the shaft member so as to be movable up and down, and a lift driving means disposed on the support member for driving the shaft member up and down. A rack disposed on the member, a pinion that meshes with the rack, a gear having a diameter larger than that of the pinion that meshes with the pinion, a braking unit disposed on the gear, and an elevating drive unit comprising a lever member for rotating the gear; It is composed of .

  According to a fifth aspect of the present invention, in the radioactive waste volume reduction processing device of the third aspect, the storage bag is a bottomed cylindrical shape having an outer diameter that can be inserted into a container portion of the bag holding means. The closure is a bag main body with an inlet extending upward, a ring-shaped cylindrical holding member fixed at a plurality of positions in the height direction on the outer periphery of the bag main body, and a zipper disposed at a receiving port of the bag main body Means, a tubular body projecting from the circumferential side portion disposed on the circumferential side portion of the bag body, a filter member filled in a position near the bag body of the tubular body, and an outer side of the filter member of the tubular body The exhaust pipe portion including the check valve and the closing means which is a zipper disposed outside the check valve of the tubular body of the exhaust pipe portion.

  According to the volume reduction processing apparatus for radioactive waste according to the present invention, a glove or exhaust which is waste generated in an airtight box such as a glove box or a hood, or generated due to the necessity of replacing each part of the glove box or hood. Filters, inner rings, airtight plugs, etc. are crushed to an appropriate size inside a glove box, filled into a storage bag, and compressed in a state of holding an appropriate shape. It can be removed from the box and stored in the required storage location. Needless to say, when the storage bag is taken out of the glove box, it should be wrapped with a film to further ensure safety.

  Therefore, radioactive waste generated in a glove box or the like can be stored while ensuring safety after it has been formed into a shape that is sufficiently reduced in volume and easy to store by a simple operation. Therefore, as described above, it is possible to avoid the enlargement of the radioactive waste storage area while ensuring safety.

This will be described in more detail.
The discarded radioactive waste such as the glove and inner ring is put into the crushing means of the apparatus installed in the glove box or the like. Inside the crushing means, these are appropriately crushed, and the crushed material is delivered into a storage bag held in the container part of the bag holding means located at the crushed material receiving position. At this time, it is needless to say that the storage bag should be held in advance in the container portion of the bag holding means, and the bag holding means should be positioned and fixed at the crushed material receiving position.

  When the amount of crushed material in the storage bag is filled to a predetermined amount, that is, to the height near the receiving port, the filling is terminated, and the bag holding means is moved to the compression position. In the compressed position, first, the upper inlet of the storage bag is closed with a closing means, and further, the vacuum pump device is connected to the exhaust pipe portion to decompress the interior of the storage bag, and while continuing this decompression operation, The storage means is compressed by operating the compression means. By this operation, the storage bag is reduced in size in the height direction while being held in the shape of the peripheral side and the bottom by the container portion, and is further reduced in volume. Since the radioactive waste is appropriately crushed, it can be filled without any gaps in the storage bag, and the inside of the storage bag is further depressurized by a vacuum pump. It is compressed well, and the volume is appropriately reduced as described above. Thereafter, the exhaust pipe is closed by the closing means, and then the vacuum pump device is disconnected. Thereafter, the vacuum pump device is removed from the exhaust pipe portion, and then the compression operation of the compression means is released. The volume reduction operation can be performed safely inside an airtight box such as a glove box, and the crushed material stored in these storage bags can be removed from the airtight box such as a glove box. Further, as described above, the storage bag can be packaged with films for safe operation.

  According to the volume reduction processing apparatus for radioactive waste 2 of the present invention, radioactive waste such as plastics and rubber can be easily and reliably crushed, and the size of the crushed material is constant. It is possible to discharge to the same size or less. Therefore, it is possible to easily reduce the volume by filling these crushed materials into a storage bag.

  According to the radioactive waste volume reduction treatment device 3 of the present invention, since the receiving port of the container portion holding the storage bag is configured to expand upward, it is easy to insert the storage bag into the container bag. In addition, since the storage bag can be surely positioned at the crushed material receiving position in a state where the storage bag is inserted and held, the storage bag can be appropriately filled with the crushed material. In addition, after storing and filling the storage bag with the crushed material, it can be reliably moved to the compressed position along the rail portion, so that decompression processing and compression processing there can be reliably performed. Further, during the compression process, the storage bag is supported by the container part on the circumferential side and the bottom part, so the compression in the height direction is performed, but other shapes are held by the container part, A processed product (storage bag containing crushed material) having a constant shape and dimension is always obtained.

  According to the radioactive waste volume reduction processing device 4 of the present invention, it is possible to obtain a compression device having a simple configuration capable of reliably compressing a storage bag filled with crushed material.

  According to the volume reduction processing apparatus for radioactive waste of 5 of the present invention, since the upper part of the storage bag is widened upward, the crushed material is reliably received, and a ring-shaped cylindrical shape is formed on the outer periphery of the bag body. Since the holding member is arranged, even if the holding member itself is made of a flexible film material, it can be reliably held in a cylindrical shape. Therefore, it can be appropriately held in the container portion of the bag holding means, and the crushed material can be charged and charged well. In addition, a zipper is configured as a closing means at the top of the storage bag, and an exhaust pipe portion is configured on the peripheral side, so that it is possible to appropriately depressurize the interior prior to the compression process, The compression operation can be performed more appropriately. Furthermore, since the exhaust pipe is filled with a filter, it is possible to avoid the problem that the crushed material inside is sucked during the decompression operation by the vacuum pump device. In addition, since a check valve is arranged in the exhaust pipe part, backflow of air can be avoided, and after completion of pressure reduction and compression operation, a zipper that is a closing means arranged near the outermost part of the exhaust pipe part Thus, it is possible to close the portion, and it is possible to avoid the inflow of air into the storage bag and to further secure the compressed state.

Front explanatory drawing of the radioactive waste volume reduction processing apparatus of one Embodiment. Plane | planar explanatory drawing of the volume reduction processing apparatus for radioactive waste of one Embodiment. Explanatory drawing of the right side of the radioactive waste volume reduction processing apparatus of one Embodiment. Explanatory drawing of the state which opened and looked at the right side of the waste crushing part of the volume reduction processing apparatus for radioactive waste of one Embodiment. (a) is an explanatory plan view showing an outline of a rotating drum, a protruding blade, and a fixed blade in a waste crushing section of the radioactive waste volume reduction processing device of an embodiment, and (b) is a part of a discharge plate Front explanatory drawing of (a) including a cover-like member (only a cover-like member is a cross section). BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view illustrating a pressing plate of a waste crushing unit of a radioactive waste volume reduction processing device according to an embodiment and a mechanism for operating the pressing plate. Side surface explanatory drawing of the storage bag of the radioactive waste volume reduction processing apparatus of one Embodiment. FIG. 8 is a cross-sectional view taken along line AA in FIG. 7. (a) is an enlarged view of the X1 portion of FIG. 8, (b) is an enlarged view of the X2 portion of FIG. 8, and (c) is an enlarged view of the X3 portion of FIG. BB sectional drawing of FIG. The partial notch schematic front view which shows the volume reduction processing apparatus for radioactive waste of one Embodiment arrange | positioned in the glove box. The partial notch schematic right view which shows the volume reduction processing apparatus for radioactive waste of one Embodiment arrange | positioned in the glove box. Partial cutaway explanatory drawing which showed the glove arranged in the glove port.

  An embodiment of the present invention will be described in detail with reference to the drawings.

  The radioactive waste volume reduction treatment apparatus of this embodiment is installed and used in a glove box 1 as shown in FIGS. 11 and 12, and FIG. 1, FIG. 2, FIG. 11 and FIG. As shown in FIG. 12, the waste crushing part (crushing means) 2 that crushes the radioactive waste and the radioactive waste crushing substance 4 held in the container part 31 of the bag holding part (bag holding means) 3 are filled. A compression part (compression means) 6 for compressing the storage bag 5, a container part 31 for holding the storage bag 5, and the container part 31 can be reciprocated between the crushed material receiving position p 1 and the compressed position p 2. The bag holding part 3 comprising rail parts 32, 32 arranged to be supported and moving parts 33, 33 arranged movably thereto, and the container part 31 of the bag holding part 3, are held at the compressed position p2. True suction and exhaust from the storage bag 5 located in the The pump device 7 and the storage bag 5 that is held in the container part 31 of the bag holding part 3 to receive the crushed material 4 of radioactive waste, fill it, compress it, and store it. It is composed of

  The glove box 1 is a known device, and only an outline will be described. As is well known, the glove box 1 is used for processing radioactive members or substances and other dangerous substances in the interior separated from the outside. As shown in FIGS. 11 and 12, a large number of glove ports 11, 11... Are provided on the front and rear wall surfaces. 12 and 12 can be used to operate the internal components. A large port 13 is provided on one side wall so that tools and processing objects can be taken in and out. The storage bag 5 filled and compressed with the crushed material 4 produced in this embodiment can also be taken out using this large port 13. The side wall on the opposite side is an equipment carry-in door 14, and the radioactive waste volume reduction treatment apparatus of this embodiment is carried into the glove box 1 from here.

  Further, the glove box 1 is provided with an air supply means 15, an exhaust means 16, and the like, and the inside is held at a negative pressure. Further, exhaust is performed through an exhaust filter so that the dirty air inside is not released to the outside.

  As shown in FIGS. 1 to 5, the waste crushing unit 2 includes a rotating drum 21, a plurality of projecting blades 22, 22... Projected on the outer periphery of the rotating drum 21, and an outer periphery of the rotating drum 21. A fixed blade 23 with its tip placed close to it, a mounting plate 24 with the fixed blade 23 fixed to the tip, and a radioactive waste placed on the mounting plate 24 are disposed on the outer periphery of the rotary drum 21. A pressing plate 25 that presses against the side and a reciprocating mechanism that reciprocates the pressing plate 25 between the rotating drum 21 and the opposite side; and a position below the rotating drum 21 and the fixed blade 23; A discharge plate 26 that allows only the crushed material 4 having a set size or less to pass downward, and a hopper 27 that guides the crushed material 4 that has passed through the discharge plate 26 to the lower crushed material receiving position p1. Of the above, the members other than the hopper 27 are accommodated in the housing.

As shown in FIGS. 1 to 3, the rotating drum 21 is connected to an electric motor 211 disposed on the outside of the casing on the end side thereof via a speed reducer 212 and is driven to rotate by the electric motor 211. It is like that.
The plurality of protruding blades 22, 22... Are arranged in a protruding state on the outer periphery of the rotary drum 21, and in particular, as shown in FIGS. 5 (a) and 5 (b), the protruding blades 22, 22. .. Are arranged in the circumferential direction at a constant angular interval, for example, an angular interval of 30 degrees as shown in the figure, and in the axial direction, the length of the rotary drum 21 is divided into approximately six intervals. Arranged at 180 degrees from one end to the other end, and the remaining 180 degrees were fixed at the same angular interval and length interval from the other end to the one end side in the opposite direction. is there. As shown in the figure, the fixed blade 23 is projected to the outer peripheral side of the rotary drum 21 in a concavo-convex shape that does not interfere with the projecting blades 22 when the rotary drum 21 rotates. As described above, it is fixed to the tip of the mounting plate 24 as described above. The mounting plate 24 is a horizontally disposed metal plate, and the radioactive waste thrown in from above is placed on the mounting plate 24.

  The above-described arrangement of the protruding blades 22 is intended to prevent a large load from being applied to the rotating drum 21 at a time.

  The pressing plate 25 presses the radioactive waste put on and placed on the mounting plate 24 against the rotating drum 21, and shears by the protruding blades 22, 22... And the fixed blade 23 as the rotating drum 21 rotates. It acts to exert its effect satisfactorily. As shown in FIGS. 1, 4, and 6, the pressing plate 25 faces a horizontal driving plate 251 coupled to the back surface of the pressing plate 25 and both side end surfaces of the driving plate 251 so as to face the inner surface of the housing. Rails 252 and 252 fixed to each other, and sandwiching rollers 253 and 253 which are arranged at two positions on both sides of the drive plate 251 and roll the rails 252 vertically, respectively, and inner surfaces of the rails 252 A roller set composed of a side roller 254 that rolls while abutting on the arm, and an arm piece 255 fixedly suspended at the end of the driving plate 251 opposite to the pressing plate 25, and reciprocates below the driving plate 251. An arm piece 255 having a driven nut 257 threadedly engaged with a drive screw 256 arranged along the moving direction is coupled to the lower portion, an electric motor 258 for a screw that drives the drive screw 256 to rotate forward and backward, and the electric motor 258. In order to transmit the rotational driving force, in a gear train 259 consisting of two gears meshing with one another which arranged between the drive screw 256 and its output shaft is obtained by reciprocating operatively configured.

In the forward direction, the radioactive waste placed on the mounting plate 24 is pressed against the rotary drum 21 side, and in the backward direction, the backward movement after the radioactive waste is crushed is performed. Is what you do. The drive plate 251, the rail 252, the roller assembly, the arm piece 255, the driven nut 257, the electric motor 258, the drive screw 256, and the gear train 259 constitute the reciprocating mechanism.
In this embodiment, the waste crushing unit 2 is configured as described above. However, another configuration may be adopted as long as the same result can be obtained regarding the crushing of the radioactive waste.

  As shown in FIGS. 1 and 5 (b), the discharge plate 26 is a cover-like member 28 arranged at regular intervals around the rotating drum 21 except for the vicinity of the portion facing the pressing plate 25. It is configured as a part of. The cover-like member 28 returns the crushed material 4 that has not passed through the discharge plate 26 to the upper side of the fixed blade 23 again by the action of the rotating drum 21 and the protruding blades 22, 22. It is arranged to get. The discharge plate 26 is configured by making a number of holes in the vicinity of the cover-like member 28 corresponding to the position immediately below the rotary drum 21. The diameter of these holes is the size of the crushed material 4 that may allow passage. In this embodiment, the discharge plate 26 is configured as described above. However, any other configuration may be adopted as long as the crushed material 4 can be appropriately sieved.

  As shown in FIGS. 1 and 3, the hopper 27 is a tubular member having a lower taper shape. Needless to say, all of the crushed material 4 that has passed through the discharge plate 26 immediately below the discharge plate 26. Is arranged so that it can be guided to the crushed material receiving position p1. In addition, an opening / closing means (not shown) is arranged at the top of the hopper 27, and when the bag holding portion 3 holding the storage bag 5 in the container portion 31 is not located at the crushed material receiving position p1, It can be closed here.

  As shown in FIGS. 1 to 3, in this embodiment, the bag holding unit 3 basically includes the container unit 31 that holds the storage bag 5 and the container unit 31 at the crushed material receiving position. In order to reciprocate between p1 and the compressed position p2, it is composed of rail parts 32, 32 arranged therebetween and moving parts (rolling members or slide members) 33, 33 arranged movably therebetween. Is. In this embodiment, a known LM guide is adopted and used as the rail portions 32 and 32 and the moving portions 33 and 33 arranged on the rail portions 32 and 32, respectively. Needless to say, the upper parts of the moving parts 33, 33 are fixed to the bottom part of the container part 31. In this embodiment, the above-described LM guide is used as the reciprocating means, but other means having the same function can naturally be adopted.

  Further, as shown in FIG. 1, a pair of position holding means 34, 34... Are arranged on the outer end side of the crushed material receiving position p1 and the compressed position p2, respectively. The container portion 31 located at the article receiving position p1 or the compressed position p2 is temporarily fixed at that position. As shown in FIG. 3, the position holding means 34 is arranged two at each end, and holds the held portions 311 and 311 that protrude one pair from both lower sides of the container portion 31. It is designed to block movement. When viewed from the end side, the position holding means 34 is a U-shaped structure, and a part of a sphere elastically protrudes inward from the rising portions on both sides of the U-shape. As shown in FIG. 3, it can enter during that time, and when it enters, it will be elastically held and held. Because it is elastic, it can be pulled out by pulling it strongly. The position holding means 34 also employs the above-described configuration in this embodiment, but other means having similar functions can also be adopted.

  As shown in FIGS. 1-3, the said container part 31 is comprised with the cylindrical rigid member provided with the bottom, and the upper receiving port is formed so that it may spread upward. Further, the container portion 31 is formed with a passage opening 312 for allowing the exhaust pipe portion 52 of the storage bag 5 to pass through at a part of the peripheral side thereof.

  As shown in FIGS. 1 and 2, the compression unit 6 includes a circular pressing plate 61 slightly smaller than the inner diameter of the container unit 31 and a shaft in which the pressing plate 61 is fixed to the lower end. It comprises a member 62, a support box (support member) 63 that supports the shaft member 62 so as to be able to move up and down, and a lifting drive means that is arranged on the support box 63 and drives the shaft member 62 to move up and down. Further, as shown in the figure, the elevating drive means rotates a rack 64 disposed in the middle of the shaft member 62, a pinion 65 meshing with the rack 64, a large-diameter gear 66 meshing with the pinion 65, and the gear 66. This is composed of a lever member 67 for moving operation. As shown in the figure, the gear 66 is provided with braking means 68 by a coil spring and a braking material to which an acting force is applied so as to press-contact each of the both surfaces of the gear 66. When the gear 66 is rotated by the lever member 67 and the pressing plate 61 is moved up and down, the operation is stopped because the braking force is applied to the gear 66 when the operation is stopped. The raising / lowering operation stops at the position. In addition, the compression unit 6 can employ a configuration having other similar functions instead.

  The vacuum pump device 7 is a general device of this type that is electrically operated. A rigid insertion tube that can be inserted into the exhaust tube portion 52 of the storage bag 5 is disposed at the tip of the suction hose 71. It is.

  As shown in FIGS. 1 and 7 to 10, the storage bag 5 has an outer diameter that can be inserted into the container portion 31 of the bag holding portion 3 with almost no gap between its inner periphery. A bag main body 51 having a bottom cylindrical shape and a part of the upper portion thereof being spread upward; ring-shaped cylindrical holding members 53 and 53 fixed at two positions on the outer periphery of the bag main body 51; A zipper male (blocking means) 541 and a zipper female (blocking means) 542 disposed at the upper receiving port, an exhaust pipe portion 52 disposed at the lower peripheral side of the bag body 51, and a pipe body 521 of the exhaust pipe portion 52 And zipper male (blocking means) 5221 and zipper female (blocking means) 5222.

  The exhaust pipe 52 includes the pipe body 521 protruding from the lower circumferential side of the bag body 51, a filter member 523 filled in a position near the bag body 51 of the pipe body 521, and the filter of the pipe body 521. The check valve 524 is configured outside the member 523. The tube body 521 is composed of a thick vinyl chloride base tube body 5211 which is hard and does not easily deform on the base side, and a distal end side is composed of a flexible vinyl film-made distal tube body 5212. As shown particularly in FIG. 10, the distal end tube body 5212 is formed by extrapolating its rear end to the distal end side of the base tube body 5211 and adhesively bonding it.

  More specifically, the filter member 523 is filled in the base tube body 5211, and the check valve 524 is configured at the tip of the base tube body 5211. The filter member 523 has a purpose of enabling exhaust while preventing discharge of the crushed material 4 in the bag body 51, and a member that matches the purpose can be employed. In this embodiment, a urethane foam filter is employed. As shown in FIG. 10, the check valve 524 is a disk-shaped member having one end formed as a hinge and opened only to the distal end side of the exhaust pipe portion 52. The tube 51 is closed when a negative pressure is generated from the distal end side of the tube body 521, and is opened when the vacuum pump device 7 is operated so that the distal end side of the tube body 521 is a negative pressure from the bag body 51 side.

  The zipper male (closing means) 5221 and the jeeper female (closing means) 5222 are arranged on the distal end pipe body 5212 of the pipe body 521.

  Moreover, although the said bag main body 51 can be comprised with a various plastic film, in this embodiment, the vinyl film was employ | adopted. Therefore, it can be easily deformed, but for the convenience of receiving the crushed material 4 that is loaded and held in the container portion 31 of the bag holding portion 3 and falling through the hopper 27, at least at that time, the substantially cylindrical shape is held. It is necessary to be. The cylindrical holding members 53 and 53 are means for holding the bag body 51 in a cylindrical shape for such a case. As the cylindrical holding members 53 and 53, various members that can hold the shape of the cylindrical body can be freely adopted by bonding and fixing the cylindrical holding members 53 and 53 to the outer periphery of the bag body 51. Then, a rigid plastic (vinyl chloride) ring member is adopted, and as shown in FIGS. 7, 8 and 9 (c), the bag body 51 is arranged on the upper and lower sides of the outer periphery of the bag body, and a film-like cover is formed thereon. Is coated and adhesively bonded to obtain the effect.

  In the figure, 81 is a column supporting the waste crushing unit 2, 82 is a column supporting the compression unit 6, 35 is the base of the bag holding unit 3, 29 is a lid on the top of the waste crushing unit 2, and 291 is A handle 292 of the lid 29 is a door at the end of the casing.

  The volume reduction treatment apparatus for radioactive waste according to this embodiment has the above-described configuration. Therefore, in this case, it occurs in the glove box 1 or from the necessity of replacing each part of itself. The radioactive waste such as the glove 12, the exhaust filter, the inner ring 17 or the airtight stopper is crushed into an appropriate size inside the glove box 1 and filled in the storage bag 5, and further, an appropriate fixed shape. And then taken out from the glove box 1 and stored in a required storage location. When the storage bag 5 is taken out from the glove box 1, it can be packaged with films to further ensure safety.

  That is, the radioactive waste generated in the glove box 1 can be stored in a storage area while ensuring safety after being reduced in volume and formed into a fixed shape that is easy to store by a simple operation. Therefore, enlargement of the radioactive waste storage area can be avoided while ensuring safety.

  As shown in FIGS. 12 and 13, the glove 12 that becomes waste is the glove 12 to be exchanged that has been used in the glove port 11 of the glove box 1, and the inner ring 17 It is a member to be exchanged that has been used to attach to the globe port 11. The waste filter is a member that has been inserted in the middle of the exhaust means 16 of the glove box 1 and is to be discarded.

The usage of the radioactive waste volume reduction processing apparatus of this embodiment will be described.
The discarded radioactive wastes such as the globe 12 and the inner ring 17 are put into the waste crushing section 2 of the present apparatus installed inside the glove box 1. Using the appropriate one or two glove ports 11 and 11 (the same applies to the following), the lid 29 on the upper part of the waste crushing part 2 is opened, and the inside of the crushing part 2 is opened. Put radioactive waste such as Globe 2 into At this time, as shown in FIG. 1, the pressing plate 25 is naturally set in a retracted state at a position away from the rotating drum 21.

  Thereafter, when the lid 29 is closed and the operation of the apparatus is started, the rotating drum 21 rotates and the pressing plate 25 also starts to move toward the rotating drum 21 side. The rotating drum 21 is rotationally driven by the rotational driving force of the electric motor 211 transmitted through the speed reducer 212. The pressing plate 25 is connected to a driven nut 257 via a driving plate 251 and an arm piece 255, and the driven nut 257 is rotated by receiving a rotational driving force transmitted from the electric motor 258. As it rotates, it moves in the axial direction. Accordingly, by appropriately determining the rotation direction here, the driven nut 257 moves to the rotating drum 21 side at this time, and accordingly, the pressing plate 256 also moves to the rotating drum 21 side. After moving to the rotating drum 21 side as much as possible, it moves backward to the original position, and thereafter, the above moving operation is repeated.

  When the pressing plate 25 moves to the rotating drum 21 side, as described above, the waste such as the globe 12 thrown into the waste crushing portion 2 is eventually pressed against the rotating drum 21 side, and the protruding blade 22 thereof. , 22... And the fixed blade 23 are sheared and crushed gradually and fall onto the discharge plate 26 below, and the crushed material 4 having a size smaller than the set size passes through a number of holes opened in the discharge plate 26. Fall down. The crushed material 26 that could not pass through the hole of the discharge plate 26 is rotated once by the action of the rotary drum 21, the discharge plate 26, and a cover member 28 that is a part of the rotary drum 21, the front side of the pressing plate 25. Returning to FIG. 5, the shearing action of the projecting blades 22, 22... And the fixed blade 23 accompanying the rotation of the rotary drum 21 is repeated and sheared.

  On the other hand, after the storage bag 5 is loaded and held in the container portion 31 of the bag holding portion 3 as shown by the solid line in FIG. 1, the rail portion 32 constituted by the LM guide as shown in FIG. , 32 and the moving parts 33, 33 are used to move the bag holding part 3 to the crushed material receiving position p 1 and to hold the held parts 311, 311 protruding from the container part 31 of the bag holding part 3. It is assumed that the bag holding portion 3 is fixed in this position by placing it in the state where it is charged in 34, 34. The storage and holding of the storage bag 5 in the container part 31 is performed in a state where the exhaust pipe part 52 of the storage bag 5 is projected from the passage opening 312 of the container part 31. At this time, the upper portion of the storage bag 5 is naturally opened, and the lower end of the hopper 27 is slightly entered into the upper opening serving as the receiving port.

  In the above state, when opening and closing means (not shown) at the top of the hopper 27 is opened, the radioactive waste crushed material 4 that has fallen through the discharge plate 26 falls through the hopper 27 and is filled in the storage bag 5. Will be. As shown by a solid line in FIG. 1, when the appropriate amount is filled in the storage bag 5, the unillustrated opening / closing means is closed to stop the crushed material 4 from falling through the hopper 27.

  Thereafter, the bag holding portion 3 is moved to the compressed position p2 as shown by a two-dot chain line in FIG. 1 using the rail portions 32, 32 and the moving portions 33, 33 configured by the LM guide. When moved, even in this position, the held portions 311 and 311 protruding from the opposite side of the container portion 31 are placed in the position holding means 34 and 34 installed at the corresponding end portions and temporarily fixed. It becomes.

  In the temporarily fixed state at the compressed position p2, the tip of the hose 71 of the vacuum pump device 7 is inserted into the exhaust pipe portion 52 of the storage bag 5 held by the container portion 31 of the bag holding portion 3 at the position. To do. In addition, the upper entrance of the storage bag 5 is closed using the zipper male 541 and the zipper female 542. Thereafter, the vacuum pump device 7 is operated to draw out the air in the storage bag 5 to be depressurized and contracted. In this state, the compression unit 6 is operated to reduce the height of the storage bag 5. Compress as much as possible. This is done by operating the lever member 67 to lower the pressing plate 61 of the compression section 6. Specifically, as shown by a one-dot chain line in FIG. 1, the pressing plate 61 is lowered to a set height in the container portion 31 to perform compression in the height direction. The circumferential direction and the bottom direction are held by the container part 31, and the storage bag 5 compresses the crushed material 4 inside to reduce only the dimension in the height direction.

  After performing the necessary compression, the tip of the hose 71 of the vacuum pump device 7 is moved to the tip of the exhaust pipe 52, and the exhaust pipe 52 is also closed using the zipper male 5221 and the zipper female 5222. Next, the operation of the vacuum pump device 7 is stopped, and the tip of the hose 71 is also pulled out from the tip of the exhaust pipe portion 52. Thereafter, the lever member 67 is operated to pull up the pressing plate 61.

  Thereafter, if the compressed storage bag 5 is taken out from the container 31 and further taken out from the glove box 1, it can be carried to a storage area and stored in a predetermined drum. Needless to say, the glove box 1 should be taken out using the large port 13 and packed with a plastic film or the like that is not contaminated with radioactivity. Thus, the radioactive waste can be taken out and stored after sufficiently reducing the volume, compressing it into a fixed shape, and ensuring safety.

  When the radioactive waste to be crushed remains, the bag holder 3 is moved to the crushed material receiving position p1 and the same process is repeated as many times as necessary.

  INDUSTRIAL APPLICABILITY The present invention can be used in the industrial field for manufacturing a volume reduction processing apparatus for radioactive waste, and in the field of processing radioactive waste in a nuclear facility using the apparatus and other fields.

DESCRIPTION OF SYMBOLS 1 Glove box 11 Glove port 12 Glove 13 Large port 14 Equipment entry door 15 Air supply means 16 Exhaust means 17 Inner ring 2 Waste crushing part (crushing means)
DESCRIPTION OF SYMBOLS 21 Rotating drum 211 Electric motor 212 Decelerator 22 Projection blade 23 Fixed blade 24 Placement plate 25 Waste crushing part pressing plate 251 Drive plate 252 Rail 253 Nipping roller 254 Side roller 255 Arm piece 256 Drive screw 257 Drive nut 258 Drive screw Electric motor 259 Gear train 26 Discharge plate 27 Hopper 28 Cover-like member 29 Cover on top of waste crushing part 291 Handle on top of waste crushing part 292 Door on end of housing 3 Bag holding part (bag holding part) means)
31 Container portion 311 Holding portion 312 Passing opening 32 Rail portion (LM guide)
33 Moving part (LM guide)
34 Position holding means 35 Base of bag holding part 4 Crushed material 5 Storage bag 51 Bag body 52 Exhaust pipe part 521 Exhaust pipe part pipe 5211 Base pipe body 5212 End pipe body 5221 Exhaust pipe part zipper male (blocking means)
5222 Zipper female of exhaust pipe (blocking means)
523 Filter member 524 Check valve 53 Cylindrical holding member 541 Zipper male (blocking means)
542 Female zipper (blocking means)
6 Compression unit (compression means)
61 Pressing plate 62 Shaft member 63 Support box (support member)
64 Rack 65 Pinion 66 Gear 67 Lever member 68 Braking means 7 Vacuum pump device 71 Hose 81 Post supporting the waste crushing part 82 Post supporting the compression part p1 Crushed object receiving position p2 Compressed position

Claims (5)

A radioactive waste volume reduction processing device for processing radioactive waste generated from itself and the processed material in the airtight box installed and used,
Means for crushing radioactive waste;
Compression means for compressing a storage bag that is held in a container part of the bag holding means and filled with crushed radioactive waste;
Bag holding that is arranged so as to reciprocate between a crushed material receiving position for receiving crushed material of the crushing means and a compressed position for compressing a storage bag filled with radioactive waste held inside by the compression means. A shape-retaining mold that holds the circumferential shape and bottom shape of the storage bag in its shape when the height of the storage bag filled with radioactive waste is compressed by the compression means. A bag holding means having a container portion also serving as
A vacuum pump device for sucking and exhausting the inside of the storage bag located at the compressed position in order to decompress the inside while being held in the container portion of the bag holding means;
A storage bag made of a plastic film having an outer diameter that can be inserted into the container portion of the bag holding means, and has a receiving port for receiving crushed material at the top, and the vacuum pump device on the inside of the peripheral side. Storage pipes each having an exhaust pipe portion for sucking and exhausting the air, and having a closing means on the receiving port and the exhaust pipe portion,
A volume reduction treatment device for radioactive waste. The crushing means,
A rotating drum, and a plurality of protruding blades protruding on the outer periphery of the rotating drum;
A fixed blade that is arranged close to the outer periphery of the rotating drum and shears the radioactive waste placed on the rotating drum with the protruding blade that passes in close proximity with the rotation of the rotating drum;
A pressing means that presses the radioactive waste to be crushed against the outer periphery of the rotating drum directly above the fixed blade;
A discharge plate that is located below the rotating drum and the fixed blade and that drops only the crushed material below the set size among the crushed radioactive waste that is crushed and dropped;
A hopper for guiding the crushed material falling from the discharge plate to the crushed material receiving position;
The volume reduction processing apparatus for radioactive waste of Claim 1 comprised by these. The bag holding means moves to and from the container part holding the storage bag, and a rail part arranged between the container part and the container part to reciprocate between the crushed material receiving position and the compressed position. Consists of freely moving parts,
The container portion is formed of a rigid member having a bottomed cylinder as a basic shape, and an upper receiving port is formed so as to expand upward, and an exhaust pipe portion of the storage bag or the vacuum pump is formed on a part of the peripheral side thereof. Forming a passage opening for passing a suction tubular member extending from the device;
3. The radioactive waste volume reduction processing apparatus according to claim 1, wherein the moving part is fixed to the bottom part of the container part so that the container part is movably arranged on the rail part. 4. The compression means;
A pressing plate for compressing a storage bag that is held in a container part of a bag holding means located at a compressed position and filled with a radioactive waste crushed material, the planar shape of which is a cross-sectional shape of the trunk part of the container part A pressing plate having the same or similar shape and a smaller dimension than that of the container part;
A shaft member fixed to the lower end of the pressing plate;
A support member that supports the shaft member to be movable up and down;
Lifting / lowering driving means arranged on the support member for driving the shaft member to move up and down, a rack arranged on the shaft member, a pinion meshing with the rack, a gear having a larger diameter than the pinion meshing with the pinion, and the gear Lifting and lowering drive means comprising a braking member and a lever member for rotating the gear;
The volume reduction processing apparatus for radioactive waste of Claim 1, 2, or 3 comprised by these. The storage bag,
A bottomed cylindrical shape with an outer diameter that can be inserted into the container portion of the bag holding means, and a bag body with an upper receiving port extending upward,
A ring-shaped cylindrical holding member fixed to a plurality of locations in the height direction on the outer periphery of the bag body;
The closing means being a zipper disposed at the receiving port of the bag body;
A tubular body projecting from the circumferential side portion disposed on the circumferential side portion of the bag body, a filter member filled at a position near the bag body of the tubular body, and a check configured outside the filter member of the tubular body The exhaust pipe part comprising a valve;
The closing means which is a zipper disposed outside the check valve of the tubular body of the exhaust pipe portion;
The volume reduction processing apparatus for radioactive waste of Claim 3 comprised by these.

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