JP2014206503A - Containment vessel for radioactive contaminants - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a containment vessel for radioactive contaminants with a cover capable of being easily opened and closed even with a human power.SOLUTION: A containment vessel for radioactive contaminants comprises: a vessel body 2 for storing radioactive contaminants inside; and a cover part 4 for closing an opening 2a of the vessel body 2 with a plurality of split covers 3. The plurality of split covers 3 are arrayed so as to cover portions of the opening 2a respectively when closing the opening 2a so that the entire opening 2a is covered with all the split covers 3.

Description

  The present invention relates to a storage container for storing radioactive contaminants generated by decontamination work.

Conventionally, when processing radioactive contaminants generated by decontamination work, if the radioactive contaminants are at a low dose, the radioactive contaminants are put in a flexible container bag (flexible bag) and stored in a temporary storage place. In addition, if radioactive contaminants such as residues after soil washing or incinerated ash are in high doses, place radioactive contaminants in a containment vessel made of RC with high shielding performance in order to reduce the exposure of workers. Stored in a temporary storage area.
The radioactive pollutants stored in the temporary storage are later transported to and stored in the intermediate storage facility. Furthermore, high doses of radioactive pollutants can be reduced to only about 1/2 even after 30 years, and will be transported and stored at the final disposal site after 30 years.

When the containment vessel formed by RC is used when transporting and storing radioactive pollutants in this way, a large amount of radioactive pollutants can be stored and transported and stored while containing the radioactive pollutants in the containment vessel. This prevents the worker from being exposed to radioactive pollutants, thereby preventing the worker from being exposed.
As a storage container for storing such a high-dose radioactive pollutant, for example, as disclosed in Patent Document 1, a container body formed in a square shape and an upper opening of the container body Some have a lid that covers and seals.

JP 2003-344588 A

  When the containment container for radioactive pollutants having a structure as in Patent Document 1 is formed of RC, for example, the weight of the lid may be about 700 kg, so that it is difficult to manually open and close the lid. Therefore, for example, if you want to store high-dose radiation pollutants at home hotspots or small amounts of incinerated ash generated at home without using heavy machinery or other equipment, The containment cannot be used.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a radioactive pollutant storage container that can be easily opened and closed by human power.

  In order to achieve the above object, a radioactive pollutant storage container according to the present invention comprises: a container body in which radioactive contaminants are stored; and a lid portion that closes the opening of the container body with a plurality of divided lids. The plurality of divided lids are arranged so as to cover a part of the respective openings when the openings are closed, and to cover the entire openings by all the divided lids.

  In the present invention, since the lid portion includes a plurality of divided lids, even if the lid portion is heavy to open and close manually, the weight of one divided lid can be set to a weight that can be easily opened and closed manually. Even a radioactive pollutant storage container having a heavy lid portion can easily open and close the split lid (lid portion) manually.

In the radioactive pollutant containment container according to the present invention, it is preferable that the adjacent divided lids overlap each other.
As described above, since the edges of the adjacent divided lids overlap each other, there is no gap between the adjacent divided lids, so that the opening of the container body can be reliably sealed, and the shielding performance is improved. Can do.

In addition, the radioactive pollutant storage container according to the present invention has a cutout portion formed in one of the adjacent divided lids, and the other portion is fitted with the cutout portion in the edge. It is preferable that the possible convex part is formed.
By doing in this way, since a clearance gap does not arise between adjacent division lids, the opening of a container main part can be sealed reliably and shielding performance can be improved.

Further, in the radioactive pollutant containment container according to the present invention, at least one of the adjacent divided lids is provided with a rubber packing at the edge portion, and the adjacent divided lids have rubber edges at each other. It is preferable to overlap through the packing.
By doing in this way, since the adjacent division | segmentation lid | covers closely_contact | adhere via rubber packing, the opening of a container main body can be sealed more reliably and shielding performance can be improved.
In addition, it is possible to reliably prevent rainwater from entering the container body from the outside.

In the radioactive contaminant storage container according to the present invention, it is preferable that the divided lid is connected to the container body via a hinge.
By doing in this way, opening and closing of a division | segmentation lid | cover can be performed easily also by human power.

In the radioactive pollutant storage container according to the present invention, it is preferable that a split lid support member that is detachable from the container main body and can support the split lid is provided.
By doing so, the divided lid can be reliably supported even when the number of the divided lids is large.

  According to the present invention, since the lid portion includes a plurality of divided lids, even if the lid portion is heavy to open and close manually, the weight of one divided lid can be easily opened and closed manually. Therefore, even if it is a radioactive pollutant storage container provided with a heavy lid, the division lid (lid) can be easily opened and closed manually.

It is a top view which shows an example of the containment container of the radioactive pollutant by embodiment of this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is the BB sectional drawing of FIG. 1 when a lid | cover is open | released.

Hereinafter, a containment container for radioactive contaminants according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 4, the radioactive pollutant storage container 1 according to the present embodiment closes a container body 2 in which radioactive contaminants (not shown) are stored, and an opening 2 a of the container body 2. A lid 4 having a plurality of divided lids 3, a divided lid support member 5 that can be attached to and detached from the container body 2 and can support a plurality of divided lids 3, 3,... (Hereinafter referred to as a plurality of divided lids 3); It has.

  The container body 2 is formed in a substantially rectangular parallelepiped box shape having an open upper surface, and has a substantially rectangular bottom portion 21 (see FIGS. 2 to 4) in plan view, and four wall portions 22 rising from four sides of the bottom portion 21; And four leg portions 23 (see FIGS. 2 to 4) that support the four corners of the bottom portion 21.

The bottom portion 21 is formed by RC in a plate shape having a predetermined thickness, and is in a state of floating from the ground surface by being supported by the leg portion 23.
Each of the wall portions 22 is formed by RC in a plate shape having a predetermined thickness, and a container main body-side cutout portion 24 extending in the entire width direction is formed inside the upper end portion 22a.
The opening 2a of the container body 2 surrounded by the four wall portions 22 is substantially rectangular in plan view.

  Of the four wall portions 22, the pair of wall portions 22b and 22b whose width direction is the vertical direction (direction C in FIG. 1) is supported by a divided lid inside the upper end portion 22a at a substantially central portion in the width direction. A split lid support member notch 25 is formed in which both end portions 5a of the member 5 can be fitted.

Here, the divided lid support member 5 will be described. As the divided lid support member 5, for example, a long member extending in the horizontal direction (direction D in FIG. 1) such as a square steel pipe is used. And the division | segmentation lid | cover support member 5 will be in the state supported and attached to the container main body 2 because both ends 5a and 5a fit into the notch parts 25 and 25 for division | segmentation lid support members of the container main body 2, respectively. .
The split lid support member 5 is configured such that both end portions 5a and 5a are not bonded to the container body 2 and are detachable from the container body 2 by being pulled up by a user (not shown).
In the present embodiment, the cutout portion 25 for the divided lid support member is formed in substantially the same shape as the cross-sectional shapes of both end portions 5a and 5a of the divided lid support member 5 in an elevational view.

The plurality of divided lids 3 are each formed by RC in a plate shape having a predetermined thickness, and are connected to the container body 2 via a hinge 6. In the present embodiment, eight divided lids 3 arranged in 2 × 4, two in the vertical direction (direction C in FIG. 1) and four in the horizontal direction (direction D in FIG. 1) in plan view. , 3... Are provided.
The plurality of divided lids 3 are set so that one weight is about 50 kg.
Here, as shown in FIG. 3, the division lid 3 is closed, the surface direction is horizontal and the opening 2a of the container body 2 is closed, and the division lid 3 is opened as shown in FIG. The state in which the thickness direction is horizontal and the opening 2a of the container body 2 is opened will be described below as an open state. Further, the upper surface 3a and the lower surface 3b of the divided lid 3 are described as the upper surface and the lower surface in the closed state, the upper surface 3a side being the upper side, and the lower surface 3b side being the lower side.

These eight divided lids 3 are configured to cover a part of the opening 2a of the container main body 2 and to cover all of the openings 2a of the container main body 2 with all eight pieces when in the closed state. For this reason, the eight divided lids 3 in the closed state have an overall outer shape slightly larger than the shape of the opening 2a of the container body 2 in plan view, and the edge of the entire outer shape is the opening edge 2b of the container body 2 It is formed so as to overlap and touch the top and bottom.
In the present embodiment, among the eight divided lids 3, the four divided lids 3c (see FIG. 1) arranged on the central side in the horizontal direction are formed in a substantially rectangular shape in plan view and arranged on the lateral end side. The four divided lids 3d (see FIG. 1) are formed in a shape in which one corner of a substantially rectangular shape is cut off in plan view.

Further, the divided lid 3 has a first lid side cutout portion 32 (FIGS. 2 to 2) extending in the length direction of the edge portion 31 on the lower surface 3b of the edge portion 31 in contact with the wall portion 22 of the container body 2 in the closed state. 4) is formed. Thus, the first cover 33 (see FIGS. 2 to 4) is formed on the divided cover 3 above the first cover-side notch 32.
And the division | segmentation lid | cover 3 of a closed state is comprised so that this 1st convex part 33 may fit in the container main body side notch part 24 of the container main body 2, and the edge part 31 is flat with the wall part 22 of the container main body 2. FIG. It overlaps visually.
In addition, although there exists a clearance gap between the container main body side notch part 24 and the 1st convex part 33 in the figure, it shall be fitted without a clearance gap.

Further, in the divided lid 3, a second lid-side notch 35 (see FIGS. 2 to 4) extending in the length direction of the edge portion 34 is formed at the edge portion 34 in contact with the adjacent divided lid 3. .
The second lid side cutout portion 35 is formed on one of the edge portions 34 of the adjacent divided lids 3, 3 on the upper side, and on the other edge portion 34 on the lower side. Yes.
Thereby, when the 2nd cover side notch part 35 is formed in the division | segmentation lid | cover 3 on the lower side, the 2nd convex part 36 (refer FIGS. 2-4) is formed in the upper side of the edge part 34, and the 1st When the two lid side cutout portion 35 is formed on the upper side, the second convex portion 36 is formed on the lower side of the edge portion 34.

The adjacent divided lids 3 and 3 are configured such that the second lid-side notch portions 35 and the second convex portions 36 formed in the adjacent edge portions 34 and 34 are respectively fitted, and the adjacent edges It is comprised so that the parts 34 and 34 may overlap.
In the figure, there is a gap between the second lid-side notch 35 and the second protrusion 36, but it is assumed that the fitting is performed without a gap.
The second lid-side notch 35 only needs to be formed on one or both of the upper and lower sides of one divided lid 3, and the second lid-side notched portion of the adjacent divided lid 3. 35 and the 2nd convex part 36 should just fit.

Further, as shown in FIGS. 2 to 4, the bottom surface 24 a of the container main body side notch portion 24 and the bottom surface 35 a of the second lid side notch portion 35 formed on the upper side of the divided lid 3 are provided with each notch portion. A rubber packing 37 extending in the entire length direction of 24 and 35 is provided. Thereby, the inner side of the upper end portion 22 a of the wall portion 22 of the container body 2 and the edge portion 31 of the divided lid 3 and the edge portions 34 and 34 of the adjacent divided lids 3 and 3 overlap with each other via the rubber packing 37. ing.
The split lid 3 is provided with a handle 38 that can be held by the user when opening and closing.

Next, a method of using the radioactive pollutant containment container 1 according to the present embodiment will be described with reference to the drawings.
First, as shown in FIG. 4, the user holds the handle 38 and sequentially opens all the divided lids 3. At this time, the split lid support member 5 is removed from the container body 2.
Subsequently, radioactive contaminants are stored inside the container body 2, and the divided lid support member 5 is attached to the container body 2. Then, all the divided lids 3 are sequentially closed.
As a result, the radioactive pollutant containment container 1 is sealed.

Further, when there are a plurality of radioactive contaminant storage containers 1, they can be used one above the other. At this time, the leg 23 of the container body 2 of the upper radioactive pollutant storage container 1 is installed on the upper end portion 22a of the wall 22 of the container body 2 of the lower radioactive contaminant storage container 1 to thereby divide the lid. The container main body 2 is configured not to be directly placed on the upper portion of 3.
When transporting the radioactive pollutant containment container 1 such as when the inside of the container body 2 is filled with radioactive pollutant and is collected by a decontamination contractor, the radioactive pollutant containment container 1 is placed on a truck with a forklift, for example. It can be transported by loading.

Next, the effects of the radioactive pollutant containment container 1 will be described with reference to the drawings.
As shown in FIGS. 1 to 4, according to the radioactive pollutant storage container 1 according to the present embodiment, the lid portion 4 includes a plurality of divided lids 3, so that the weight of the lid portion 4 is manually opened and closed. Since the weight of one divided lid 3 can be easily opened and closed by human power even in the case of a heavy load, even the radioactive pollutant storage container 1 having the heavy lid portion 4 can be divided manually. 3 (lid portion 4) can be easily opened and closed.

  And the division | segmentation lid | cover 3 of a closed state is comprised so that the 1st convex part 33 may fit in the container main body side notch part 24 of the container main body 2, and the edge part 31 overlaps with the wall part 22 of the container main body 2. FIG. In addition, the second lid-side notch portion 35 and the second convex portion 36 formed on the adjacent edge portions 34 and 34 are respectively fitted so that the adjacent edge portions 34 and 34 overlap each other. As a result, there is no gap between the container body 2 and the divided lid 3 and between the adjacent divided lids 3 and 3, so that the opening 2a of the container body 2 can be reliably sealed, and the containment container 1 for radioactive contaminants is shielded. Performance can be increased.

  Further, according to the radioactive pollutant storage container 1 according to the present embodiment, the inside of the upper end portion 22a of the wall portion 22 of the container body 2, the edge 31 of the divided lid 3, and the edge of the adjacent divided lids 3 and 3 are used. 34 and 34 overlap with each other through the rubber packing 37, so that the divided lid 3 can reliably seal the opening 2a of the container body 2, and the shielding performance of the radioactive pollutant storage container 1 is improved. be able to. In addition, it is possible to reliably prevent rainwater from entering the container body 2 from the outside.

In addition, according to the radioactive pollutant storage container 1 according to the present embodiment, the split lid 3 is connected to the container body 2 via the hinge 6 so that the split lid 3 can be easily opened and closed manually. Can do.
Further, according to the radioactive pollutant storage container 1 according to the present embodiment, the split lid support member 5 is provided, so that the split lid 3 can be reliably supported in the closed state.
And even when the number of the division | segmentation lids 3 increases for weight reduction of the division | segmentation lid | cover 3, the division | segmentation lid | cover support member 5 can support the division | segmentation lid | cover 3 in a closed state reliably.

Further, according to the radioactive pollutant storage container 1 according to the present embodiment, the container body 2 and the divided lid 3 are formed of RC, so that it is durable and can be stored in the intermediate storage facility while storing the radioactive pollutant. It can be stored and then transported to a final disposal site and can be used (stored) for a long time also in the final disposal site.
Further, according to the radioactive pollutant storage container 1 according to the present embodiment, it can be used in the vertical direction, so that the space for temporary storage or storage can be reduced.

As mentioned above, although embodiment of the containment container of the radioactive pollutant by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the above-described embodiment, the container body 2 is formed in a substantially rectangular parallelepiped shape, but may be other shapes such as a cylindrical shape.
Further, in the above-described embodiment, the leg portion 23 is provided in the container body 2, but a configuration without the leg portion 23 may be employed.
In the embodiment described above, the eight divided lids 3 are provided, but the number of the divided lids 3 may be set as appropriate.
In the embodiment described above, the divided lid 3 is connected to the container main body 2 via the hinge 6. However, the hinge 6 may not be provided, and may not be connected to the container main body 2 in the open state. Also good.

In the above-described embodiment, the rubber packing 37 is provided on the bottom surface 24 a of the container main body side notch 24 and the bottom surface 35 a of the second lid side notch 35 formed on the upper side of the divided lid 3. However, the rubber packing may not be provided.
In the above-described embodiment, the divided lid support member 5 is provided, but the divided lid support member 5 may not be provided.
In the embodiment described above, the divided lid 3 is formed with the first lid-side notch 32 and the second lid-side notch 35, and the container body 2 is formed with the container body-side notch 24. However, such notches 24, 32, and 35 may not be provided.
Further, grooves are formed in the divided lid 3 and the container body 2 in place of the notches 24, 32, and 35, and the divided lid 3 is fitted in the grooves in place of the first convex portion 33 and the second convex portion 36. It is good also as a structure in which the protruding item | line to match was formed. Thus, the shape and number of the notches 24, 32, and 35 and the convex portions 33 and 36, and the positions to be provided may be set as appropriate.

DESCRIPTION OF SYMBOLS 1 Containment container of radioactive pollutant 2 Container body 3, 3c, 3d Divided lid 4 Lid part 5 Divided lid support member 24 Container body side notch part 31, 34 Edge part 32 First lid side notch part 33 1st convex part 35 2nd cover side notch part 36 2nd convex part

Claims (6)

A container body in which radioactive contaminants are stored;
A lid portion for closing the opening of the container body with a plurality of divided lids,
The plurality of divided lids are arranged so as to cover a part of each of the openings when the opening is closed, and to cover the entire opening by all the divided lids. container.   The containment container for radioactive contaminants according to claim 1, wherein the adjacent divided lids have overlapping edges.   One of the adjacent divided lids is formed with a notch at the edge, and the other is formed with a protrusion that can be fitted with the notch at the edge. A containment vessel for radioactive contaminants according to claim 2.   The rubber packing is provided on the edge portion of at least one of the adjacent divided lids, and the edge portions of the adjacent divided lids overlap with each other via the rubber packing. Containment container for radioactive contaminants according to 2 or 3.   5. The radioactive pollutant storage container according to claim 1, wherein the divided lid is connected to the container main body via a hinge. 6.   6. A containment container for radioactive pollutants according to claim 1, further comprising a split lid support member that is detachable from the container body and can support the split lid. .

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