JP2009300406A - Processing container of radioactive waste and method of processing radioactive waste using the processing container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processing container of radioactive wastes equipped with a floating preventing tool that facilitates fixing to a container. <P>SOLUTION: The processing container 10 of the radioactive wastes includes the floating preventing tool 20. The processing container includes an annular groove 11a on the inner surface of the container sidewall in the vicinity of a top opening at least. The floating preventing tool includes a tool body 21 arranged inside the processing container at a position corresponding to the annular groove, a lock means 22 which is locked to the annular groove so as to fix the tool body inside the processing container using the annular groove, and the floating preventing means 23 of the radioactive wastes fixed to the tool body or the lock means or provided to the tool body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a radioactive waste processing container and a radioactive waste processing method using the processing container, and more specifically, in a processing container when storing low-level radioactive solid waste discharged from a nuclear power plant. The present invention relates to a processing container provided with a means for preventing the waste from rising, and a method for processing radioactive waste using the processing container.

In general, low-level radioactive miscellaneous solid waste such as old work clothes, gloves, and replaced parts discarded at nuclear power plants is stored in a waste disposal container, and the void portion is filled with solidified material such as mortar materials. After being filled and solidified by, it is stored in a specific facility.
By the way, when filling and solidifying radioactive waste with a filling solidifying material as described above, those with a specific gravity smaller than that of the filling solidifying material such as work clothes and gloves are filled even if left in a waste disposal container. When the solidified material is filled in the container, it floats on the upper surface of the filled solidified material due to buoyancy, and cannot be embedded in the filled solidified material.
Therefore, when storing radioactive waste in the processing container, a floating prevention jig is used, and after storing the radioactive waste in the processing container, the floating prevention jig is locked to the inner peripheral surface of the container. The solidified material is filled from the inside to prevent the radioactive waste from rising (for example, Patent Document 1 or 2).

Japanese Patent Laying-Open No. 2005-227036 (see FIGS. 4 to 7) JP 2004-226146 A (see FIGS. 1 to 3)

By the way, in the techniques disclosed in the above Patent Documents 1 and 2, the floating prevention jig is locked to the drum can by fitting the C-ring-shaped annular body into the annular recess formed on the inner peripheral surface of the container. However, in any case, using a separately prepared member (arc-shaped body, wedge jig, etc.), the C-ring-shaped annular body is expanded, and the annular body is locked to the annular recess of the drum can. Therefore, the installation work was complicated.
In addition to the above, the thing of patent document 1 has to weld-fix the metal support body and the suppression body to the inner surface of a drum can previously, and the operation | work becomes further complicated, and also an anti-floating device is provided. Since it has a connection body, a binding part, etc., manufacturing cost becomes high. Moreover, the thing of patent document 2 has a complicated structure, and manufacturing cost increases, and it is unsuitable for accommodating the compression body formed by compressing and compressing radioactive waste.

  The present invention has been made in view of the actual circumstances of the background art described above, and is a radioactive waste processing container that can be easily prevented from rising by the filled solidifying material of the stored radioactive waste, and uses the processing container. An object of the present invention is to provide a method for treating radioactive waste that can be easily handled.

In order to achieve the above object, a radioactive waste processing container according to claim 1 is a radioactive waste processing container provided with a rising prevention jig, and the processing container is at least a container side wall near an upper opening. An annular groove is provided on the inner surface, and the levitation prevention jig uses a jig main body disposed in the processing container at a position corresponding to the annular groove, and the jig main body using the annular groove. Locking means for engaging with the annular groove to be fixed in the processing container, and prevention of floating of the radioactive waste fixed to the jig body or the locking means or provided in the jig body Means.
Here, the radioactive waste stored in the processing container according to the present invention is preferably low-level radioactive solid waste such as old work clothes, gloves, replaced parts, etc., discarded at the nuclear power plant described above. However, the present invention is not limited to this. In addition, from the viewpoint of volume reduction and suppression of floating, a compressed and compressed body is preferable. However, it may be a separate body or a radioactive waste placed in a net. The processing container is usually a cylindrical container such as a drum, but may be a square container. In the present invention, the vicinity of the upper opening of the processing vessel is a position about 5 to 15 cm below the upper opening. The annular groove is a ring zone provided in the drum can or the like. The levitation prevention jig is a jig that is installed on the upper part of the processing container and prevents levitation due to the filled solidified material when radioactive waste is stored in the processing container.

The radioactive waste processing container according to claim 2 is the invention according to claim 1, wherein the processing container is a three-ring zone in which three annular grooves are provided in the vertical direction of the processing container. It is a drum can.
Such a three-ring drum can is a drum can defined in JIS A 1600, and has a ring (annular groove) in the vicinity of the upper opening.

The radioactive waste processing container according to claim 3 is the invention according to claim 1 or 2, wherein the jig body is close to the inner diameter of the processing container to such an extent that the jig body can be smoothly disposed in the processing container. It is an annular frame having an outer diameter.
Here, when the processing container is a drum can as defined in JIS A 1600, since the inner diameter of the drum can is about 566 mm, the outer diameter of the annular frame is about 20 to 50 mm smaller than that, 520 to 545 mm. The degree is preferred.

Further, the radioactive waste processing container according to claim 4 is the invention according to any one of claims 1 to 3, wherein the levitation preventing means is substantially equidistant at three or more sites on the periphery of the jig body. It is characterized by a plate-like piece that is fixed in the above and protrudes inward in the radial direction.
Here, as for the fixed location of the said plate-shaped piece, 3-6 locations are preferable. The material of the plate-like piece is not particularly limited as long as it has rigidity and durability, but is usually iron or steel. The size and shape are not particularly limited as long as the filling and solidifying material can be filled smoothly and a sufficient floating prevention effect can be obtained.

According to a fifth aspect of the present invention, there is provided the radioactive waste processing container according to the fourth aspect of the invention, wherein the levitation prevention means further comprises a net-like body or a porous body fixed to the plate-like piece. It is characterized by that.
Here, examples of the mesh body include a wire mesh and a mesh metal, and the mesh size is preferably about 5 to 50 mm. Examples of the porous body include punching metal and expanded metal. As for the dimension of the hole of this porous body, about 5-50 mm is preferable.

According to a sixth aspect of the present invention, there is provided the radioactive waste processing container according to the fourth or fifth aspect, wherein the locking means is screwed into a female screw of a bracket fixed to the portion where the plate-like piece is provided. And the bolt is inserted into the annular groove.
Here, the bolt is a commonly used bolt. Although the dimension of this volt | bolt changes with shapes of the annular groove to be inserted, when using a drum can as a processing container, the thing of about 30-60 mm is preferable.

In order to achieve the above object, a radioactive waste processing method according to claim 7 is a radioactive waste processing method using the radioactive waste processing container according to any one of claims 1 to 6. A compressed body obtained by compressing and compressing radioactive waste is put into the processing container, and the floating prevention jig is provided in the annular groove provided on the inner surface of the container side wall near the upper opening of the processing container. It is characterized by being fixed by use, filled with a solidified material such as cement mortar or cement paste to the position where the fixed anti-floating jig is embedded, and then sealed with a lid.
Here, the compressed body is formed by pressurizing at a pressure of 30 to 600 kg / cm ² by, for example, a high-pressure press and compression-molding to a size that can be accommodated in a processing container. What is necessary is just to use the conventionally used filling solidification material by the conventional method.

  According to the first aspect of the present invention, there is no need to previously form a concrete lining layer on the inner surface of the processing container or to provide a metal fitting for attaching a levitation prevention device, and the inner surface of the container side wall near the upper opening of the processing container. It is necessary to use a processing vessel provided with an annular groove, but if this processing vessel is used, a floating prevention jig is provided in the annular groove of the processing vessel and a jig main body of the floating prevention jig. Since it is only necessary to use a simple locking means, it is very easy to mount the anti-floating jig, and it is possible to easily prevent the radioactive waste from floating and attach the anti-floating jig. Since the position is near the upper opening of the processing container, radioactive waste can be efficiently stored.

  Further, according to the present invention of claim 2 described above, since the existing three-wheeled drum can of JIS standard is used as the processing container, it is easy to obtain and the processing cost is reduced while utilizing the shape of the drum. Reduction can be achieved. In addition, processing with stable quality and performance is possible.

  Further, according to the present invention of claim 3, since the jig main body is an annular frame and the outer surface is sized and shaped along the inner surface of the processing container, the floating prevention jig is loaded. Since the operation is easy and close to the inner surface of the processing container, the locking operation is also facilitated. In addition, since the structure is simple, the manufacturing cost is low and mass production is possible.

  In addition, according to the present invention of claim 4 described above, the levitation preventing means is constituted by plate-like pieces installed at substantially equal intervals in the circumferential direction of the jig body. The stored radioactive waste can be pressed into the processing container without being offset. In particular, it is suitable for preventing the rising of a compressed body obtained by compressing radioactive waste. Moreover, it becomes easy to fill the processing container with a filling solidified material such as mortar.

  Further, according to the present invention of claim 5, since the central portion of the jig main body is further covered with a net-like body or a porous body, it cannot be prevented by the floating prevention means by the plate-like piece. For example, work clothes, gloves Therefore, it is possible to process the processed product as it is without forming a compressed product obtained by compressing the processed product.

  Further, according to the present invention of claim 6, since the jig main body is locked to the container by the bolt, the installation work of the floating prevention jig is extremely easy and the processing cost is low.

  Further, according to the present invention of claim 7, since the compressed waste of the radioactive waste is used and the processing container having the above-described effects is used, it is simple and efficient. Thus, radioactive waste can be stored in the processing container while preventing floating.

  Embodiments of a radioactive waste processing container and a radioactive waste processing method using the processing container according to the present invention will be described below in detail with reference to the drawings.

First, FIG. 1 is a perspective view showing a first embodiment of a radioactive waste processing container according to the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part in FIG.
The radioactive waste processing container 10 shown in FIG. 1 includes a rising prevention jig 20.

  The processing container 10 includes a container body 11 and a lid body 12. The container body 11 has an annular groove 11a formed on the inner surface of the side wall near the upper opening. In the present embodiment, the processing vessel 10 is a steel open head drum (JIS standard) with a three-stage ring zone (three ring zones), and the inner surface of the uppermost ring zone. The annular groove formed in is used as the annular groove 11a.

  The levitation prevention jig 20 includes a jig main body (annular frame) 21, locking means 22 for locking the jig main body 21 to the container main body 11, and radioactive waste accommodated in the container main body 11 in a container. It is constituted by a floating prevention means 23 that restrains the body (prevents the floating of radioactive waste above the position of the floating prevention jig 20).

  The jig body 21 is formed by annularly forming a steel strip 21a and joining both ends thereof to each other by welding or the like to form an annular frame body. It is formed slightly smaller (about 20 to 50 mm) than the inner diameter of the container main body 11 to the extent that there is no hindrance to the insertion into the container main body 11. Moreover, the height (band width) of the frame is formed to be about 20 to 40 mm.

  As shown in FIG. 2, the locking means 22 includes a steel bracket 24 having two pieces 24 a and 24 b that are orthogonal to each other, and a bolt 25 that is screwed into the bracket 24. The four brackets 24 are arranged on the inner surface of the jig body 21 at equal intervals, and the base of one piece 24a is fixed to the inner surface of the jig body 21 by welding or the like. The one piece 24a is formed with a female screw hole 24c, and the bolt 25 is screwed into the male screw hole 24c.

  The levitation prevention means 23 is constituted by a rectangular steel plate-like piece 26, and the plate-like piece 26 has one side 26 a extending in the center direction of the processing vessel 10 at one side 26 a thereof. The other piece 24b is joined to the lower surface by welding or the like. The plate-like piece 26 is preferably installed so that the other side (lower side) 26 b is formed on an inclined surface and is inclined upward toward the center of the processing vessel 10. Such tilting is preferable because the stored radioactive waste can be centered. The extending length of the plate-like piece 26 is not particularly limited, but is preferably about 1/3 to 1/2 of the radius of the processing container 10.

  Further, in this embodiment, as the floating prevention means 23, a circular porous plate 27 formed of expanded metal is inscribed in the bracket 24 and joined to the upper surface of the piece 24b of the bracket 24 by welding or the like. Has been. The perforated plate 27 may be a net plate such as a wire net.

  In the radioactive waste processing container 10 described above, it is preferable to reduce the volume by compressing and compressing low-level radioactive miscellaneous solid waste such as old work clothes, gloves and replaced parts to be discarded at a nuclear power plant. The compressed body A thus formed is accommodated, and then the levitation prevention jig 20 is inserted into the container body 11, and the bolt 25 is turned with a spanner or the like to insert the tip into the annular groove 11a of the container body 11. The floating prevention jig 20 in this state is locked to the container body 11 (see FIG. 3).

  Next, a filling and solidifying material slurry B such as cement mortar or cement paste is injected from the opening of the container body 11 until the floating prevention jig 20 is buried. At that time, the radioactive waste compressed body A tends to float in the filled solidified material slurry B by buoyancy in some cases, but as shown in FIG. It is blocked and stays in the packed solid material slurry B. Further, even if a small piece or the like of the processed material peeled off from the compressed body A at the time of injecting the filled solid material slurry B, the perforated plate 27 prevents the floating. The radioactive waste compressed body A is positioned at the center of the container body 11 by the inclined side 26b of the plate-like piece 26, and in that state, the filled solidified slurry B is solidified and fixed. The container body 11 is sealed with a lid 12.

  In addition to the radioactive waste compressed body A, the radioactive waste processing container 10 stores the radioactive waste A ′ in a state where the radioactive waste is not compressed and compressed, that is, in a disjoint state. May be. Also in this case, as shown in FIG. 4, the stored radioactive waste A ′ in a separated state is prevented from floating by the floating prevention means 23, particularly the porous plate 27, and remains in the filled solidified slurry B. The radioactive waste A ′ can be effectively fixed.

A safety confirmation test for the buoyancy of the filled solidified material of the levitation prevention jig 20 of the present invention was performed.
[Calculation of buoyancy]
When the radioactive waste compressed body A is solidified by using the solidified material slurry B filled with cement mortar, the force F generated in the ascent prevention jig 20 by the buoyancy acting on the radioactive waste compressed body A is obtained. The radioactive waste was the low-level radioactive miscellaneous solid waste.

(1) Maximum capacity of radioactive waste compressed body A: 69.5 cm
(2) Maximum outer diameter of radioactive waste compact A: Assumed to be φ56.0cm
(3) Volume of compact A of radioactive waste:
φ56 ² π / 4 × 69.5 = 171,179 cm ³
(4) Bulk density of cement mortar: 2.2 g / cm ³
(5) Buoyancy of compressed body A of radioactive waste:
2.2 × 171,179 ≒ 377kg
(6) Storage weight of radioactive waste compressed body A: Assumed to be 280 kg
(7) Force F generated in the levitation prevention jig 20:
377-280 = 97 kg

[Confirmation test]
A 200-liter steel open-head drum can (JIS standard) provided with a three-stage ring zone (three ring zones) (container body 11) was used.
As shown in FIG. 5, a suspension disk 28 is joined to the lower surface of the four plate-like pieces 26 of the levitation prevention jig 20 of the present invention by welding or the like, and an eyebolt 29 is formed at the center of the suspension disk 28. Were concatenated.
The bracket 24, the plate-like piece 26, and the bolt 25 used in this test method are as follows.

Iron bracket: 50 x 50 x 6 x 25 mm
Iron plate-shaped piece: 50 x 100 x 4.5 mm
Iron bolt: M10

(1) The levitation prevention jig 20 is locked in the annular groove 11 a of the drum can 11 by a bolt 25.
(2) Water W was poured into the drum 11 so that the drum weight + water = 210 kg (safety factor: 210/97 = 2.2).
(3) The hanging disk 28 was gently lifted by the crane through the eyebolt 29.

[Results]
It was confirmed that the levitation prevention jig 20 remained locked in the annular groove 11a and was not dropped, deformed or broken from the drum can 11.

  Next, FIG. 6 and FIG. 7 show a second embodiment of the radioactive waste processing container according to the present invention.

  In the radioactive waste processing container 30 of this embodiment, the same container body 11 and lid 12 as the processing container 10 of the first embodiment are employed. Further, the radioactive waste is a compressed body A of the radioactive waste as described above.

  The floating prevention jig 40 of the processing container 30 is accommodated in the container main body 11 with a locking means 42 for locking the elastic C ring-shaped jig main body (annular frame) 41 to the container main body 11. It is comprised by the floating prevention means 43 which restrains the compressed body A of a radioactive waste in a container main body.

  As shown in FIG. 7, the jig body 41 is formed of a steel strip (having the same dimensions as those of the first embodiment) having a protruding portion 41a whose cross-sectional central portion is bent and protrudes outward. Has been. Then, screw rods 42a and 42b having different male screw winding directions are fixed to both ends of the jig main body 41 by welding or the like, and turnbuckles 42c are screwed onto the screw rods 42a and 42b. The locking means 42 is configured.

  Similarly to the above-described embodiment, the levitation prevention means 43 is constituted by a rectangular steel plate-like piece 44, and its end 44 a is coupled to the inner surface of the jig body 41 by welding or the like. The plate-like piece 44 has a longitudinal end extending in the center direction of the processing container 30, and preferably, a lower side 44 b is formed on an inclined surface and is inclined upward toward the center of the processing container 30. is set up.

  Compression formed by compressing and compressing low-level radioactive solid waste such as old clothes, gloves and replaced parts to be disposed of at the nuclear power plant into the radioactive waste processing container 30 described above. The body A is accommodated, and then the floating prevention jig 40 is inserted into the container main body 11, the turn buckle 42 c is rotated by a spanner or the like to expand the jig main body 41, and the protruding portion 41 a is annularly formed on the container main body 11 It is made to insert in the groove | channel 11a. The floating prevention jig 40 in this state is locked to the container body 11 (see FIG. 7).

  Next, a filling and solidifying material slurry B such as cement mortar or cement paste is injected from the opening of the container body 11 until the floating prevention jig 40 is buried. At that time, the radioactive waste compressed body A tries to float inside the filled solid material slurry B by buoyancy, but its floating is prevented by the plate-like piece 44 of the floating preventing means 43, so that the solid material slurry B enters the filled solid material slurry B. stay. Further, the radioactive waste compressed body A is positioned at the center of the container body 11 by the inclined side 44b of the plate-like piece 44, and in that state, the filled solidified material slurry B is solidified and fixed. The container body 11 is sealed with a lid 12. In FIG. 6, a perforated plate is not provided, but a net-like body or a porous body may be provided as in the first embodiment.

  Next, FIG. 8 and FIG. 9 show a third embodiment of the radioactive waste processing container according to the present invention.

  In the radioactive waste processing container 50 of this embodiment, the same container body 11 and lid 12 as the processing container 10 of the first embodiment are used. Further, the radioactive waste is also a compressed body A of radioactive waste as described above.

  The floating prevention jig 60 of the processing container 50 is housed in the container main body 11 and a locking means 62 for locking the elastic C ring-shaped jig main body (annular frame body) 61 to the container main body 11. It is comprised by the floating prevention means 63 which restrains the compressed body A of a radioactive waste in a container main body.

  As shown in FIG. 9, the jig body 61 is constituted by a steel strip (having the same dimensions as those in the first embodiment) having a protruding portion 61 a whose cross-sectional central portion is bent and protrudes outward. Has been. And the latching means 62 is comprised by interposing the spring 62a in the both ends of this jig | tool main body 61 mutually.

  Similarly to the above-described embodiment, the levitation prevention means 63 is constituted by a rectangular steel plate-like piece 64, and its end 64a is coupled to the inner surface of the jig body 61 by welding or the like. The plate-like piece 64 has an end portion in the longitudinal direction extending in the center direction of the processing container 50, and preferably, a lower side 64 b is formed on an inclined surface and is inclined upward toward the center of the processing container 50. is set up.

  In this radioactive waste disposal container 50, low-level radioactive solid waste such as old work clothes, gloves, replaced parts, etc., to be discarded at the nuclear power plant, is compressed as in the above embodiment. Then, the compression body A that has been reduced in volume is accommodated, and then the floating prevention jig 60 is inserted into the container body 11 with the spring 62a bent and the diameter of the floating prevention jig 60 reduced. By releasing the external force of the spring 62 a, the jig main body 61 is expanded, and thereby the protrusion 61 a is inserted into the annular groove 11 a of the container main body 11. The floating prevention jig 60 in this state is locked to the container body 11 (see FIG. 9).

  Next, a filling solidified material slurry B such as cement mortar or cement paste is injected from the opening of the container body 11 until the floating prevention jig 60 is buried. At that time, the compressed body A of the radioactive waste tries to float in the filled solid material slurry B by buoyancy, but its floating is prevented by the plate-like piece 64 of the floating prevention means 63, and the compressed solid material slurry B enters the filled solid material slurry B. stay. In FIG. 8, the porous plate is not provided. However, as in the first embodiment, even if a net-like body or a porous body is provided and a small piece of the processed material peeled off from the compressed body A has emerged, The levitation may be prevented by the mesh or porous body. The radioactive waste compressed body A is positioned at the center of the container body 11 by the inclined side 64b of the plate-like piece 64, and in that state, the filled solid material slurry B is solidified and fixed. The container body 11 is sealed with a lid 12.

  Next, FIG. 10 and FIG. 11 show a fourth embodiment of the radioactive waste processing container according to the present invention.

  In the radioactive waste processing container 70 of this embodiment, the same container body 11 and lid 12 as the processing container 10 of the first embodiment are employed. Further, the radioactive waste is also a compressed body A of radioactive waste as described above.

The floating prevention jig 80 of the processing container 70 is composed of two sets of jigs 81 and 82. The jig 81 is provided with a long rod portion 83 having a locking piece 83a at the outer end and a male screw 83b at the inner end, and a short length having a locking piece 84a at the outer end and a male screw 84b at the inner end. Rod portion 84 and a turnbuckle 85 screwed into both male screws 83b and 84b.
Similarly to the jig 81, the jig 82 includes a long rod portion 86 provided with an engaging piece 86a at the outer end and a male screw 86b formed at the inner end, and an engaging piece 87a at the outer end. A short rod portion 87 having a male screw 87b formed at the inner end, and a turnbuckle 88 that is screwed into both male screws 86b and 87b.
A part of the long rod portion 86 of the jig 82 is curved, and the curved portion 86c avoids interference with the long rod portion 83 of the jig 81.

  A compact formed by compressing and reducing the volume of low-level radioactive miscellaneous solid waste such as old work clothes, gloves, and replaced parts to be disposed of at the nuclear power plant in the radioactive waste processing container 70 Contains A.

  Next, by inserting the jig 81 of the rising prevention jig 80 into the container body 11 and rotating the turnbuckle 85, the locking pieces 83a and 84a are inserted into the annular groove 11a of the container body 11, Subsequently, the locking piece 86a, 87a is inserted into the annular groove 11a of the container body 11 by inserting the jig 82 of the rising prevention jig 80 into the container body 11 and rotating the turnbuckle 88. . The floating prevention jig 80 in this state is locked to the container body 11 (see FIG. 11).

  Next, as in the above-described embodiment, a filling solidified material slurry such as cement mortar or cement paste is injected from the opening of the container body 11 until the floating prevention jig 80 is buried. At that time, the radioactive waste compressed body A tries to float inside the filled solidified slurry by buoyancy, but the rod portions 83, 84, 86, 87 of the jigs 81, 82 and the turnbuckles 85, 88 The floating is prevented and stays in the filled solidified slurry. The container body 11 is sealed with a lid 12.

  In this embodiment, the locking means is constituted by rod portions 83, 84, 86, 87, turnbuckles 85, 88, locking pieces 83a, 84a, 86a, 87a, and the floating prevention means is a rod. It is constituted by portions 83, 84, 86, 87 and turnbuckles 85, 88. That is, in this embodiment, each rod portion and turnbuckle are a jig body in the floating prevention jig, and also a part of the locking means and the floating prevention means. In the jigs 81 and 82 of the above-described embodiment, the bending portion 86c of the rod portion 86 and the rod portion 83 may be joined to each other by welding or the like. Further, the jig main body, the locking means, and the floating prevention means are not separately provided, but may have a shared portion as in the fourth embodiment.

  Although various embodiments of the radioactive waste processing container and the radioactive waste processing method using the processing container according to the present invention have been described above, the present invention is not limited to the above-described embodiments. It is not a thing, but the technical idea of the present invention described in the claims, that is, a radioactive waste processing container provided with a floating prevention jig, wherein the processing container is a container at least near the upper opening. An annular groove is provided on the inner surface of the side wall, and the levitation prevention jig uses a jig main body disposed in a processing container at a position corresponding to the annular groove, and the jig main body using the annular groove. Locking means for engaging the annular groove to be fixed in the processing container, and the radioactive waste floating prevention means fixed to the jig body or the locking means or provided in the jig body It is characterized by having , A technical idea of a radioactive waste processing container, and a radioactive waste processing method using the radioactive waste processing container, wherein a compressed body obtained by compressing and compressing the radioactive waste is Put in the processing vessel, fix the floating prevention jig using the annular groove provided on the inner side wall of the vessel near the upper opening of the processing vessel, and fill the solidified material such as cement mortar and cement paste. Various modifications can be made within the scope of the technical idea of the radioactive waste treatment method, characterized in that the fixed levitation prevention jig is filled up to a position where it is buried and then sealed with a lid. Of course, changes are possible.

It is the perspective view which showed 1st Embodiment of the processing container of the radioactive waste which concerns on this invention. It is a principal part expanded sectional view in FIG. FIG. 2 is a conceptual cross-sectional view showing a radioactive waste processing method according to the present invention using the processing container according to the present invention shown in FIG. 1. It is a conceptual sectional view showing another example of the radioactive waste processing method according to the present invention using the processing container according to the present invention shown in FIG. It is a conceptual sectional view showing an apparatus for carrying out a safety confirmation test for buoyancy of a levitation prevention jig of the present invention. It is the perspective view which showed 2nd Embodiment of the processing container of the radioactive waste which concerns on this invention. It is a principal part expanded sectional view in FIG. It is the perspective view which showed 3rd Embodiment of the processing container of the radioactive waste which concerns on this invention. It is a principal part expanded sectional view in FIG. It is the perspective view which showed 4th Embodiment of the processing container of the radioactive waste which concerns on this invention. It is a cross-sectional view of a state in which the floating prevention jig in FIG. 10 is mounted in the container body.

Explanation of symbols

10 Processing container 11 Container body (drum)
11a Annular groove 12 Lid 20 Lifting prevention jig 21 Jig body 21a Steel strip 22 Locking means 23 Lifting prevention means 24 Bracket 24a, 24b Bracket piece 25 Bolt 26 Plate-like piece 26a, 26b Side of plate-like piece 27 Perforated plate 30 Processing container 40 Lifting prevention jig 41 Jig body 41a Protruding portion 42 Locking means 42a, 42b Screw rod 42c Turnbuckle 43 Lifting prevention means 44 Plate-like pieces 44a, 44b Sides of the plate-like piece 50 Processing container 60 Lifting prevention jig 61 Jig body 61a Protruding portion 62 Locking means 62a Spring 63 Lifting prevention means 64 Plate-like pieces 64a, 64b Plate-side pieces 70 Processing container 80 Lifting prevention jigs 81, 82 Jig 83 Long Rod part 83a Locking piece 83b Male screw 84 Short rod part 84a Locking piece 84b Male screw 8 5 Turnbuckle 86 Long rod portion 86a Locking piece 86b Male screw 86c Curved portion 87 Short rod portion 87a Locking piece 87b Male screw 88 Turnbuckle A Compressed body of radioactive waste A 'Radioactive waste in a disassembled state B Filling Solidification material slurry W Water

Claims (7)

  A radioactive waste processing container provided with a levitation prevention jig, wherein the processing container is provided with an annular groove at least on the inner surface of the container side wall near the upper opening, and the levitation prevention jig is provided with the annular groove. A jig body disposed in the processing container at a position corresponding to the above, and a locking means for engaging the annular groove to fix the jig body in the processing container using the annular groove; A radioactive waste processing container fixed to the jig body or the locking means or provided with the radioactive waste floating prevention means provided in the jig body.   2. The radioactive waste processing container according to claim 1, wherein the processing container is a three-ring belt drum in which three annular grooves are provided in the vertical direction of the processing container. 3.   The radioactive waste according to claim 1 or 2, wherein the jig main body is an annular frame having an outer diameter close to an inner diameter of the processing container so that the jig main body can be smoothly arranged in the processing container. Processing container.   The said floating prevention means is a plate-like piece protruding inward in the radial direction, which is fixed at substantially equal intervals at three or more sites on the peripheral edge of the jig body. The radioactive waste processing container according to any one of 3 above.   5. The radioactive waste processing container according to claim 4, wherein the levitation prevention means further comprises a net or a porous body fixed to the plate-like piece.   6. The locking means according to claim 4 or 5, wherein the locking means is a bolt that is screwed into a female screw of a bracket fixed to a portion where the plate-like piece is provided, and is fitted into the annular groove. The radioactive waste processing container described.   A radioactive waste processing method using the radioactive waste processing container according to any one of claims 1 to 6, wherein a compressed body obtained by compressing and compressing the radioactive waste is put into the processing container. The floating prevention jig is fixed by using the annular groove provided on the inner surface of the container side wall near the upper opening of the processing container, and the fixed solidification material such as cement mortar or cement paste is fixed. A method for treating radioactive waste, comprising filling up to a position where a jig is embedded and then sealing with a lid.

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