JP3185018U - Radiation shielding container - Google Patents

Abstract

A radiation shielding container that can be incinerated is provided.
A container body 2 has a tapered shape. The container body 2 and the lid 4 are made of a plastic material that can be incinerated at a public incinerator. The container body 2 is formed with a space for containing radioactively contaminated waste D inside thereof by, for example, a cardboard cylindrical partition 8. Between the partition 8 and the container body 2, a shielding material mainly composed of silicone is filled. The height of the cylindrical partition 8 is lower than the height of the container body 2.
[Selection] Figure 2

Description

  The present invention relates to a radiation shielding container that can contain radioactively contaminated waste in a shielded state, and in particular, accommodates relatively high level radioactively contaminated waste generated during decontamination work for transportation and temporary storage. The present invention relates to a radiation shielding container for storage.

  Since the day of the Fukushima nuclear power plant accident caused by the Great East Japan Earthquake that occurred on March 11, 2011, decontamination work to remove radionuclides scattered in a wide area is in progress.

  The target of decontamination work is various such as forest, field, site, house, road. Decontamination means collecting radionuclides diffused in a wide area, and in addition to this, for example, in the case of contaminated water, it involves volume reduction work such as adsorbing radionuclides with a decontamination filter. Since decontamination filters that adsorb radionuclides and gloves and clothes used during decontamination work cause problems of secondary contamination, some countermeasures are necessary.

  Thus, there is a need for a container that safely and efficiently transports and stores a relatively small waste among the radioactively contaminated waste generated by decontamination and the like. Further, the container itself containing the radioactively contaminated waste also becomes radioactively contaminated waste.

  The inventor of the present application has come up with the present invention in recognition that there is a limit to reducing the volume of radioactively contaminated waste accumulated in large quantities, and that this will become a bigger problem in the future than it is now. is there. In addition, the inventor of the present application needs a simple shielding container that can shield radioactive waste generated at the site of decontamination work while being engaged in the decontamination work, and can be transported from the decontamination site for temporary storage. He came to devise the present invention by feeling the nature.

  An object of the present invention is to provide a radiation shielding container that can be incinerated.

  It is a further object of the present invention to provide a radiation shielding container that can be incinerated and carried by hand and can be stacked.

The above technical problem is, according to one aspect of the present invention,
A plastic container body that can be incinerated;
The lid of the container body, and is composed of a plastic lid that can be incinerated,
The container main body is surrounded by a cylindrical partition made of a material that can be incinerated, and has a relatively small first space for containing radioactively contaminated waste, and the cylindrical partition. A second space between the container body and
And further comprising an incineration-possible shielding material filled in the second space,
The container body has a tapered shape tapered toward the bottom;
The height level of the upper end of the cylindrical partition is lower than the height level of the container body,
The internal space of the container body is configured by the relatively small-diameter first space surrounded by the cylindrical partition and containing the radioactively contaminated waste, and a large-diameter space located above the first space,
Stacking a plurality of container bodies containing the radioactively contaminated waste in a state in which the bottom part of the container body positioned relatively above is placed in the large-diameter space of the container body positioned relatively below This is achieved by providing a radiation shielding container characterized in that

According to the second aspect of the present invention, the above technical problem is:
A plastic container body that can be incinerated;
The lid of the container body, and is composed of a plastic lid that can be incinerated,
The container main body includes a first cylindrical partition made of a material that can be incinerated, and a second cylindrical partition located outside the first cylindrical partition. Surrounded by the first cylindrical partition and sandwiched between the first space having a relatively small diameter for containing radioactively contaminated waste, the first cylindrical partition, and the second cylindrical partition A ring-shaped second space and a relatively large-diameter ring-shaped third space between the second cylindrical partition and the container body,
And further comprising an incineration-possible shielding material filled in the second space,
The container body has a tapered shape tapered toward the bottom;
The height level of the upper end of the first and second cylindrical partitions is lower than the height level of the container body,
A plurality of container bodies containing the radioactively contaminated waste can be stacked in a state in which the bottom part of the container body located relatively above is placed in the container body located relatively below. This is accomplished by providing a radiation shielding container.

According to the third aspect of the present invention, the above technical problem is:
A plastic container body that can be incinerated;
The lid of the container body, and is composed of a plastic lid that can be incinerated,
The container body has an inside thereof,
A cylindrical partition made of incinerated material to form a space for containing radioactively contaminated waste;
And an incineration-possible shielding material located outside the cylindrical partition,
The upper end of the container body has a stepped structure by a flange,
A plurality of container bodies containing the radioactively contaminated waste can be stacked in a state where the bottom of the container body positioned relatively above is seated on the flange of the container body positioned relatively below. This is achieved by providing a radiation shielding container.

It is a perspective view of the radiation shielding container of 1st Example, and has shown the state which opened the lid | cover. It is a longitudinal cross-sectional view of the radiation shielding container of 1st Example. It is a figure for demonstrating the state which piled up the container main body of the radiation shielding container of 1st Example. It is a figure for demonstrating the modification of the container main body of the radiation shielding container of 1st Example. It is a perspective view of the radiation shielding container of 2nd Example. It is a longitudinal cross-sectional view of the radiation shielding container of 2nd Example. It is a figure for demonstrating the state which piled up the container main body of the radiation shielding container of 2nd Example. It is a perspective view of the radiation shielding container of 3rd Example. It is a longitudinal cross-sectional view of the radiation shielding container of 3rd Example. It is a figure for demonstrating the state which piled up the container main body of the radiation shielding container of 3rd Example.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First Example (FIGS. 1 to 4) :
1 to 3 show the radiation shielding container 100 of the first embodiment, and FIG. 4 shows a modification. The shielding container 100 of the first embodiment includes a bottomed container body 2 having a circular cross section and a lid 4. The cross-sectional shape of the container body 2 is not limited to a circle. As a modification, a polygonal cross-sectional shape such as a rectangular cross-section as shown in FIG. 4 may be used.

  The container body 2 has a tapered shape slightly tapered toward the bottom. The shielding container 100 has a handle 6 and is large enough to hold the handle 6 and carry it. Of course, a handle may be provided in the container body 2 in place of the handle 6.

  The container body 2 and the lid 4 are made of a plastic material. By the way, waste plastic tends to be incinerated for the purpose of reducing the final disposal amount of waste and recovering heat. For this reason, it is desirable that the plastic material used as the material of the container body 2 and the lid 4 is selected from materials that can be incinerated at a public incineration site.

  The container main body 2 has a cylindrical partition 8 inside thereof, and a shielding material 10 is filled between the cylindrical partition 8 and the inner side surface of the container main body 2. The cylindrical partition 8 is preferably arranged as concentric as possible with the axis of the container body 2.

  The cylindrical partition 8 may be, for example, cardboard, or the cylindrical partition 8 may be configured with a small container similar to the container body 2. This small container is made of a plastic material that can be incinerated. Preferably, the small container is made of the same plastic material as the container body 2 described above.

  The shielding material 10 is preferably composed of a material that can be incinerated, and is preferably composed of a shielding material mainly composed of silicone developed by various companies after the accident at the Fukushima nuclear power plant. The shielding material 10 is filled up to the upper end of the cylindrical partition 8.

  Although the bottom of the cylindrical partition 8 is constituted by the bottom of the container body 2, an additional shielding material 10ad having a predetermined thickness may be spread on the bottom of the cylindrical partition 8 (FIG. 2).

  Referring to FIG. 2, it should be noted that the height dimension of the cylindrical partition 8 is smaller than the height dimension of the container body 2. That is, the internal space 12 of the container body 2 is a two-step upper and lower stepped space constituted by a lower small-diameter space 14 having a small diameter by a cylindrical partition 8 and an upper large-diameter space 16 positioned above the space. .

  As a usage of the shielding container 100 of the first embodiment, the container main body 2 is used alone, and the radioactive contamination waste D is accommodated in the container body 2 to cover the lid 4, or an additional shielding material 10ad in the upper large-diameter space 16 is used. However, the radioactive contamination waste D is typically placed in the lower small-diameter space 14 surrounded by the shielding material 10 of the container body 2 and stacked. (FIG. 3). An additional shielding material 10ad may be laid on the bottom of the lower small-diameter space 14 in the lowermost container body 2 (B), and the uppermost container body 2 (T) The radial space 16 may be filled with an additional shielding material 10ad.

  As a modification, the container body 2 and the lid 4 may have a hollow structure, and the container body 2 and the lid 4 having a hollow structure may be filled with a shielding material mainly composed of, for example, silicone.

Second Example (FIGS. 5 to 7) :
The radiation shielding container 200 of the second embodiment has a container body 22 and a lid 24 made of a plastic material that can be incinerated, as in the first embodiment described above. Although the shielding container 200 of the second embodiment is relatively larger than the first embodiment described above, an operator can carry it alone. A handle or handle may be provided on the container body 22.

  The cross-sectional shape of the container body 22 is circular in cross section in the second embodiment, but is not limited to this. As a modified example, as described as a modified example with reference to FIG. 4 in the first embodiment, a polygonal cross-sectional shape such as a rectangular cross section may be used.

  Referring to FIG. 6, the inner space of the shielding container 200 according to the second embodiment is partitioned in the first to third radial directions by the first and second cylindrical partitions 26 and 28. It is composed of three spaces 30, 32, and 34. The first and second cylindrical partitions 26 and 28 may be made of, for example, cardboard or a plastic material. Moreover, the 1st, 2nd cylindrical partition 26 and 28 may comprise either one or both with the bottomed container from which a magnitude | size differs. The material of the container is also preferably made of a plastic material that can be incinerated.

  The radioactive contamination waste D is accommodated in the first space surrounded by the first cylindrical partition 26 located inside, that is, the central space 30. The above-described shielding material 10 is filled in the second space 32 formed by the first cylindrical partition 26 and the second cylindrical partition 28 located outside thereof, that is, the ring-shaped intermediate space. . A ring-shaped third space 34 formed by the second cylindrical partition 28 and the container body 22 is a spare space, and may be filled with a shielding material 10 as necessary, or may be a plastic cushion. Material may be filled.

  The first and second cylindrical partitions 26, 28 have a height dimension that is lower than the height dimension of the container body 22. Preferably, the first and second cylindrical partitions 26 and 28 are designed so that the upper ends thereof are at the same height level. However, the height of the upper ends of the second partitions 28 that are positioned relatively outside is relatively high. The height level may be slightly higher than the height level of the upper end of the first cylindrical partition 26 located inside.

  The shielding container 200 of the second embodiment has a tapered shape that is slightly tapered toward the bottom, as in the first embodiment. From this, as explained in the first embodiment, the container body 22 containing the radioactively contaminated waste D can be stacked (FIG. 7).

  As a modification, the container body 22 and the lid 24 may have a hollow structure, and the container body 22 and the lid 24 having a hollow structure may be filled with a shielding material mainly composed of, for example, silicone.

Third Example (FIGS. 8 to 10) :
The radiation shielding container 300 of the third embodiment has a container body 32 and a lid 34 made of a plastic material that can be incinerated, as in the first embodiment described above. In the shielding container 300 of the third embodiment, a handle or a handle may be provided on the container body 32.

  The cross-sectional shape of the container body 32 is circular in the third embodiment, but is not limited to this. As a modified example, as described as a modified example with reference to FIG. 4 in the first embodiment, a polygonal cross-sectional shape such as a rectangular cross section may be used.

  With reference to FIG. 8, the shielding container 300 of 3rd Example has the flange 36 in the upper end part of the container main body 32, and the upper end part of the container main body 32 has a stepped structure by this upper end flange 36. The container body 32 constituting the shielding container 300 of the third embodiment typically has the same circular cross-sectional diameter from the upper end portion to the lower end portion, but the bottom is the same as in the first and second embodiments. You may have a taper-shape toward.

  In the illustrated example, the internal structure of the container main body 32 is substantially the same as that of the first embodiment described above, but the upper end of the cylindrical partition 8 extends to the same height as the upper end flange 36. Good. Between the cylindrical partition 8 and the container main body 32, the incineration shielding material 10 described above is filled.

  The container body 32 and the lid 34 are made of a plastic material as in the first and second embodiments. The cylindrical partition 8 is made of, for example, corrugated cardboard as in the first embodiment, but may be a plastic material that can be incinerated, or the cylindrical partition 8 is made up of a small plastic container. May be. Of course, the same internal structure as that of the second embodiment described above may be employed in the third embodiment.

  Also in the third embodiment, the radioactively contaminated waste D is accommodated in the space 14 surrounded by the cylindrical partition 8. Since the flange 36 is provided at the upper end of the container body 32, the flange 36 can be used to stack up and down (FIG. 10). That is, a plurality of container bodies 32 can be stacked in a state where the outer peripheral edge portion of the bottom of the container body 32 positioned relatively above is seated on the flange 36 of the container body 32 positioned relatively below.

  As a modified example, the container body 32 and the lid 34 may have a hollow structure, and the container body 32 and the lid 34 having a hollow structure may be filled with a shielding material that can be incinerated mainly including, for example, silicone.

  According to the first to third embodiments, the radioactive contamination waste D is accommodated in the shielding containers 100, 200, and 300, thereby reducing the radiation emitted from the waste D from being scattered outside. be able to. Therefore, it is possible to improve the safety of workers when the radioactively contaminated waste D generated in the decontamination work is put into the shielding containers 100, 200, 300 and transported from the site to the temporary storage place. Also, in the temporary storage place, as shown in FIGS. 3, 7, and 10, the shielding containers 100, 200, and 300 can be stacked, so that many shielding containers 100, 200, and 300 are accommodated in the temporary storage place. be able to. Moreover, when the shielding container 100, 200, 300 becomes unnecessary or is damaged, it can be incinerated.

DESCRIPTION OF SYMBOLS 100 Radiation shielding container of 1st Example 2 Container main body 4 Cover 8 Cylindrical partition 10 Shielding material 14 Lower small diameter space (waste storage space)
16 Upper large-diameter space 200 Radiation shielding container of second embodiment 22 Container body 24 Lid 26 First partition (inside)
28 Second partition (outside)
30 First space (waste storage space)
32 Second space (intermediate space)
34 Third space (outside space)
300 Radiation shielding container of third embodiment 32 Container body 34 Lid 36 Top flange

Claims (7)

A plastic container body that can be incinerated;
The lid of the container body, and is composed of a plastic lid that can be incinerated,
The container main body is surrounded by a cylindrical partition made of a material that can be incinerated, and has a relatively small first space for containing radioactively contaminated waste, and the cylindrical partition. A second space between the container body and the container body,
And further comprising an incineration-possible shielding material filled in the second space,
The container body has a tapered shape tapered toward the bottom;
The height level of the upper end of the cylindrical partition is lower than the height level of the container body,
The internal space of the container body is configured by the relatively small-diameter first space surrounded by the cylindrical partition and containing the radioactively contaminated waste, and a large-diameter space located above the first space,
Stacking a plurality of container bodies containing the radioactively contaminated waste in a state in which the bottom part of the container body positioned relatively above is placed in the large-diameter space of the container body positioned relatively below A radiation shielding container characterized in that A plastic container body that can be incinerated;
The lid of the container body, and is composed of a plastic lid that can be incinerated,
The container main body includes a first cylindrical partition made of a material that can be incinerated, and a second cylindrical partition located outside the first cylindrical partition. Surrounded by the first cylindrical partition and sandwiched between the first space having a relatively small diameter for containing radioactively contaminated waste, the first cylindrical partition, and the second cylindrical partition A ring-shaped second space, and a relatively large-diameter ring-shaped third space between the second partition and the container body,
And further comprising an incineration-possible shielding material filled in the second space,
The container body has a tapered shape tapered toward the bottom;
The height level of the upper end of the first and second cylindrical partitions is lower than the height level of the container body,
A plurality of container bodies containing the radioactively contaminated waste can be stacked in a state where the bottom part of the container body positioned relatively above is placed in the container body positioned relatively below. A radiation shielding container. A plastic container body that can be incinerated;
The lid of the container body, and is composed of a plastic lid that can be incinerated,
The container body has an inside thereof,
A cylindrical partition made of incinerated material to form a space for containing radioactively contaminated waste;
And an incineration-possible shielding material located outside the cylindrical partition,
The upper end of the container body has a stepped structure by a flange,
A plurality of container bodies containing the radioactively contaminated waste can be stacked in a state where the bottom of the container body positioned relatively above is seated on the flange of the container body positioned relatively below. A radiation shielding container.   The radiation shielding container according to claim 1, wherein the container body has a circular cross section.   The radiation shielding container according to claim 1, wherein the container body has a rectangular cross section.   The radiation shielding container according to any one of claims 1 to 5, wherein the shielding material is a material mainly composed of silicone.   The radiation shielding container according to any one of claims 1 to 6, wherein the container body includes a handle or a handle that an operator can hold and carry the radiation shielding container.

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