JP2015049070A - Radioactive contaminant isolation container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a low-cost easily transportable radioactive contaminant isolation container that can safely accommodate a radioactive contaminant without leakage, and can easily transport it to intermediate storage facilities and a final disposal site to keep it like temporarily storage.SOLUTION: A radioactive contaminant isolation container includes an outer container, an inner container, and high density slurry filled in a gap between them. The outer container has an outer lid that can hermetically cover an upper opening part and is made of steel or plastic. The inner container is supported by a plurality of support pieces so as to form a gap between the internal surface of the outer container and the internal container in the outer container, accommodates a radioactive contaminant therein, has an inner lid that can hermetically cover an upper opening part, and is made of steel or plastic.

Description

  The present invention has no leakage of radioactively contaminated soil, decontaminated material, waste and other radioactive pollutants, safely stored, and easily transported to intermediate storage facilities and final disposal sites, The present invention relates to a radioactive contaminant isolation container that can be temporarily stored.

  Conventionally, radioactive pollutants such as soil contaminated with radioactive materials, decontaminated materials, and wastes are temporarily placed in weather-resistant soil bags or concrete containers.

  However, the weather-resistant soil is made of polypropylene, polyester, etc., and is a soil-free soil with an ultraviolet deterioration of about 3 years. There is no shielding effect, and there is a possibility that it will leak immediately upon contact with rainwater. In addition, due to aging deterioration, there is a possibility that the suspension belt may be damaged during movement, the earthen burrs may be torn, and there is a possibility of being exposed to an explosion, and there is no countermeasure after 3 years.

  In addition, the shielding effect of concrete containers is proportional to the thickness of the concrete, and if the effect is increased, the weight increases and there is a difficulty in movement. However, there is a possibility that water leaks due to cracks and the like, and the price of the concrete container is high.

Utility Model Registration No. 3177179 Utility Model Registration No. 3179960

  In view of the above-described conventional drawbacks, the present invention can safely store radioactive contaminants without leaking, and can be easily transported to intermediate storage facilities and final disposal sites for temporary storage and the like. It aims to provide a radioactive contaminant isolation container that can be cheap and easily transported.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

  In order to achieve the above object, the present invention provides a steel or plastic outer container having an outer lid capable of covering an upper opening in a sealed state, and an inner wall surface of the outer container in the outer container. Inside made of steel or plastic with an inner lid that can cover the upper opening in a sealed state, containing radioactive contaminants inside that is supported via a plurality of support pieces so that there is a gap between them The radioactive ray substance isolation container is comprised by the container and the high specific gravity mud water with which the clearance gap between this inner side container and the said outer side container was filled.

As is clear from the above description, the present invention has the following effects.
(1) According to the first aspect, since the high specific gravity mud is filled in the gap between the outer container and the inner container, the inner container can be shielded and impermeable by the high specific gravity mud.
Therefore, it is possible to reliably prevent the radioactivity of the radioactive contaminant stored in the inner container from leaking from the outer container.
(2) According to the above (1), the inner container containing radioactive contaminants is stored in the outer container, and the outer periphery of the inner container is filled with high specific gravity mud water. It can be reliably prevented from being damaged and can be transported safely.
Moreover, if the high specific gravity mud is removed during the transfer, the weight becomes light, and the transfer can be performed easily and easily.
(3) According to the above (1), since the outer container, the inner container, and the high specific gravity mud are used, it can be easily transported to the site of use and can be easily installed at the intermediate holding facility or the final disposal site at low cost.
(4) In the second and third aspects, the same effects as in the above (1) to (3) can be obtained.

The front view of the 1st form for carrying out the present invention. Sectional drawing which follows the 2-2 line of FIG. Sectional drawing which follows the 3-3 line of FIG. The partially broken explanatory view of the outside container of the 1st form for carrying out the present invention. The partially broken explanatory view of the inner side container of the 1st form for carrying out the present invention. Explanatory drawing of the use condition of the 1st form for implementing this invention. Explanatory drawing in the case of conveying the 1st form for implementing this invention. The partially broken sectional view of the 2nd form for carrying out the present invention. Sectional drawing which follows the 9-9 line of FIG. Explanatory drawing of the inner side container of the 2nd form for implementing this invention. The front view of the 3rd form for carrying out the present invention. Sectional drawing which follows the 12-12 line of FIG. Explanatory drawing of the outer cover of the 3rd form for carrying out the present invention.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

  In the first embodiment for carrying out the present invention shown in FIG. 1 to FIG. 7, 1 does not leak radioactive pollutant 2 such as soil contaminated with radioactivity, decontaminated substance, waste, The radioactive pollutant isolation container of the present invention that can be safely stored and temporarily stored in an intermediate holding facility or final disposal site. The radioactive pollutant isolation container 1 has an upper opening 3 formed therein. A cubic outer container 7 made of steel or plastic, which can be loaded on a truck, and provided with an outer lid 6 that can cover the upper opening 3 of the outer container body 4 in a sealed state with a plurality of bolts 5; A plurality of support pieces 8 and 8A provided on the inner bottom surface and inner wall surface of the outer container 7 so as to protrude inwardly, and are supported and stored in the outer container 7 by the plurality of support pieces 8 and 8A. The radioactive pollutant 2 is stored inside A steel or plastic inner container 12 having an inner lid 11 which can cover the upper opening 9 of the inner container body 10 formed with the upper opening 9 with a plurality of bolts 5 in a sealed state; In the state where the radioactive pollutant 2 is accommodated in the inner container body 10 located in the outer container 7 from the upper opening 9 and the upper opening 9 is closed by the inner lid 11, the plurality of support pieces 8 and 8A, filled with a gap 13 between the inner wall surface of the outer container 7 and the outer wall surface of the inner container 12, having a height of 2.3 or more, optimally 2.3 to 2.5. It is comprised with the high specific gravity mud water 14 of specific gravity.

  Among the plurality of support pieces 8, 8A, the support piece 8 on the inner wall surface of the outer container 7 is an inclined surface 15 whose lower part protrudes inward from the upper part.

In addition, the high specific gravity mud water 14 is, for example, tap water 12 ?, super clay 660g, hematite 36kg, L-175 360g, and a total of 49.1kg / 20? In addition, 1000 g of tap water, 55 g of super clay, 3007 g of hematite, 30 g of L-175, totaling 4092 g / 1670.1 ml, and a high specific gravity mud of 2.45 is used.
In addition, the high specific gravity mud water 14 should just have a high specific gravity of 2.3 or more.

  Further, although the description has been given of the case where the heads of the plurality of bolts 5 that fix the outer container body 4 and the outer lid 6 in a sealed state protrude from the upper surface of the outer lid 6, the present invention is not limited to this, and the outer lid 6 may be formed with a recess in which the head of the bolt 5 is accommodated.

  The radioactive pollutant isolation container 1 configured as described above removes the outer lid 6 of the outer container 7 from the outer container body 4 and stores the inner container body 10 of the inner container 12 with the inner lid 11 removed in the outer container body 4. The outer lid 6, the inner lid 11 and the high specific gravity mud water 14 are loaded on the truck 16 and transported to a place where the radioactive pollutant 2 is present, and the radioactive pollutant 2 is placed inside the inner container body 10 at the portion. The inner lid 11 is fixed to the inner container body 10 with a plurality of bolts 5, and the inner container 12 is sealed.

  Thereafter, the gap 13 between the outer container body 4 and the inner container 12 is filled with the high specific gravity mud water 14, and the outer peripheral portion of the inner container 12 is covered with the high specific gravity mud water 14, and then the upper opening of the outer container main body 4 is opened. The part 3 is covered with an outer lid 6, fixed to the outer container body 4 with a plurality of bolts 5, and the outer container 7 is fixed in a sealed state.

  In this state, if the site is used as an intermediate storage facility, or transported to an intermediate storage facility or final disposal site in another location, it is loaded and transported as it is or filled with high specific gravity mud water 14. Alternatively, the radioactive pollutant isolation container 1 may be completed by being loaded on a truck and transported, and then filled with high specific gravity mud water 4.

[Different forms for carrying out the invention]
Next, different modes for carrying out the present invention shown in FIGS. 8 to 13 will be described. In the description of the different embodiments for carrying out the present invention, the same components as those in the first embodiment for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted.

  The second embodiment for carrying out the present invention shown in FIGS. 8 to 10 is mainly different from the first embodiment for carrying out the present invention in that the outer wall 7 and the outer container 7 are disposed on the outer peripheral wall and the bottom surface. In the point of using the inner container 12A in which a plurality of support pieces 8 and 8A for forming the gap 13 are formed, the radioactive pollutant isolation container 1A configured using such an inner container 12A is used. The same effect as the first embodiment for carrying out the present invention can be obtained.

  The third embodiment for carrying out the present invention shown in FIGS. 11 to 13 is mainly different from the first embodiment for carrying out the present invention in that opening and closing that can be filled with high-specific gravity mud water 14. A radioactive contaminant isolation container 1B configured using such an outer container 7A in that an outer container 7A using an outer cover 6A provided with a high specific gravity mud filling port 18 that can be opened and closed by a cover 17 is used. However, the same effect as the first embodiment for carrying out the present invention can be obtained.

  The high specific gravity mud water filling port 18 is opened and closed so that the radioactive pollutant isolation container 1B can be placed on top of the outer lid 6A without projecting upward from the upper surface of the outer lid 6A with the lid 17 closed. A lid housing recess 19 is formed.

  Further, the screw portion 20 that is screwed with a plurality of bolts 5 for fixing the outer lid 6 formed around the upper opening 3 of the outer container body 4, particularly eye bolts 21, 21, 21, 21 at portions near the four corners. May be attached, and the lifting work may be facilitated using a wire 22, 22, 22, 22 with a crane or the like.

  Furthermore, you may use what provided the leg member which protrudes below in the four corners of the bottom face of the outer side container main body 4 so that the outer side containers 7 and 7A can be lifted with a forklift.

  The present invention is used in the industry for manufacturing radioactive contaminant isolation containers for storing and storing radioactive contaminants.

1, 1A, 1B: radioactive pollutant isolation container,
2: Radioactive contaminants, 3: Upper opening,
4: outer container body, 5: bolt,
6, 6A: outer lid, 7, 7A: outer container,
8, 8A: support piece, 9: upper opening,
10: inner container body, 11: inner lid,
12, 12A: inner container, 13: gap,
14: High specific gravity mud, 15: Inclined surface,
16: Truck, 17: Open / close lid,
18: High specific gravity mud filling port, 19: Opening / closing lid storage recess,
20: Screw part, 21: Eye bolt,
22: Wire.

The high specific gravity mud water 14 is, for example, 12 l of tap water, 660 g of super clay, 36 kg of hematite, and 360 g of L-175, for a total of 49.1 kg / 20 l.
2.45 high specific gravity mud is used, or 1000 g of tap water, 55 g of super clay, 3007 g of hematite, 30 g of L-175, resulting in a total of 4092 g / 1670.1 ml. used.
In addition, the high specific gravity mud water 14 should just have a high specific gravity of 2.3 or more.

Claims (4)

A plurality of supports are provided so that a gap is formed between the outer container made of steel or plastic having an outer lid capable of covering the upper opening in a sealed state and the inner wall surface of the outer container. A steel or plastic inner container having an inner lid in which radioactive contaminants are housed inside supported by a piece and can cover the upper opening in a sealed state, the inner container and the outer container, A radioactive pollutant isolation container comprising high specific gravity mud filled in a gap between the two. The radioactive contamination according to claim 1, wherein the outer container is sized to be loaded on a truck, and a plurality of support pieces are provided on the inner wall surface to form a gap between the outer container and the inner container. Substance isolation container. 2. The radioactive pollutant isolation container according to claim 1, wherein a plurality of support pieces for forming a gap between the outer container and the outer container are provided on the outer wall surface of the inner container. 4. The radioactive pollutant isolation container according to any one of claims 1 to 3, wherein the high specific gravity mud water has a high specific gravity of 2.3 or more.

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