JP3182144U - Shelter bag - Google Patents

Abstract

Provided is a shelter bag capable of safely containing and storing contaminated waste containing organic matter that rots while preventing scattering of radioactive materials and leakage of radiation.
An outer bag 1 formed in a bag shape, an inner bag 3 filled with waste 5 and accommodated in the outer bag 1, and a valve 4 attached so as to penetrate the outer bag 1 and the inner bag 3. And the inner bag 3 is made of a sheet material kneaded with barium sulfate that does not allow ventilation and water permeation and has a radiation shielding effect, and the opening 3a can be squeezed and bound, and the valve 4 has a radioactive substance. The radioactive substance adsorption removal sheet 4c to which the adsorbent is attached is attached.
[Selection] Figure 3

Description

  The present invention solves the problems that occur when storing and temporarily storing various contaminated waste such as soil, debris, etc. containing radioactive materials (such as rupture of containers due to generated gas, scattering of radioactive materials, leakage of radiation). The present invention relates to a shelter bag which is a bag-like container to be solved.

As this type of bag-like container, for example, as shown in Patent Document 1, a cylindrical charging portion for narrowing down is connected to the upper end of a barrel portion formed in a bottomed cylindrical shape, and waste is A bag-like container is known in which a cylindrical charging portion is squeezed into a purse-like shape and bundled after being accommodated in the portion.
JP 2009-143583 A

  When the above conventional bag-like container is used for storing and storing contaminated waste such as soil contaminated with radioactive substances, the bag is filled with the contaminated waste in an inner bag made of a resin sheet that cannot be vented and permeated. The inner bag is squeezed at the open end and bound with a tie, and then the squeezed and bound portion of the inner bag is completely sealed with a sealing tape, etc. It prevents leakage or scattering to the outside.

  However, when contaminated waste contains organic matter such as dead leaves and grass, depending on the storage conditions, these organic matter may generate heat due to biological or chemical action in the bag-like container, or methane gas. There is a problem that the sealed inner bag is ruptured by the generated gas or the generated methane gas is spontaneously ignited by the generated heat and develops into a fire. Currently, as a bag-like container for storing and temporarily storing contaminated waste containing radioactive materials, a container called a flexible container bag (flexible container bag), which is generally used for storing and storing powder, etc., is provisionally. Although diverted, these problems have actually occurred in flexible container bags, and it has been found that they are inappropriate for the storage and temporary storage of contaminated waste.

  The present invention has been made by paying attention to such a situation, and it is possible to release generated gas while preventing the scattering of radioactive materials and greatly reducing radiation leakage, and contains organic matter. An object of the present invention is to provide a shelter bag that is a bag-like container that can safely store and store contaminated waste.

  In order to achieve the above object, the present invention is configured as follows.

  (1) A shelter bag according to the present invention comprises an outer bag, an inner bag filled with contaminated waste and accommodated in the outer bag, and a valve penetrating the outer bag and the inner bag. Is made of a sheet material kneaded with barium sulfate having a radiation shielding effect and has a property of impervious to air permeability and water permeability, and the opening is configured to be able to narrow down and bind, and the valve is radioactive. The radioactive substance adsorption removal sheet to which the substance adsorbent is attached is attached.

  In the present invention having the above-described configuration, the radioactive substance adsorption / removal sheet attached to the lower part of the valve is a fine non-woven fabric, so that ventilation is possible, and organic substances contained in the contaminated waste contained therein decay and methane gas is generated. However, the gas is easily released from the valve to the outside without staying in the inner bag. Therefore, the inner bag is not ruptured by the generated gas, and the generated gas filled in the inner bag does not spontaneously ignite and develop into a fire of the inner bag or the shelter bag body.

  Further, the radioactive substance adsorbing / removing sheet made of non-woven fabric carries a radioactive substance adsorbent, and the radioactive substance (cesium) is adsorbed and captured efficiently, so that scattering of cesium can be greatly reduced. Further, since the plastic material used for the inner bag is kneaded with barium sulfate having a radiation shielding effect, leakage of radiation to the outside can be greatly reduced.

  Thus, according to the shelter bag of the present invention, even when storing and storing contaminated waste containing radioactive substances, it is possible to release the generated gas while preventing scattering of radioactive substances, Contaminated waste containing organic matter can be safely stored and stored.

It is a perspective view of the shelter bag of one Example of this invention. It is a longitudinal cross-sectional view of the shelter bag of one Example. It is a longitudinal cross-sectional view which shows the outline of the accommodation process of the waste in the shelter bag of one Example. It is a perspective view in the state where the inner bag of the shelter bag of one embodiment was narrowed down and closed. It is a perspective view in the inner lid closed state of the shelter bag of one Example. It is a perspective view in the state where the shelter bag of one example was closed.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an appearance of a shelter bag A which is a bag-like container according to the present invention, and FIG. 2 shows a longitudinal sectional view thereof. The shelter bag A includes an outer bag 1 having an upper end opening 1a that can be narrowed down and closed, an inner bag 2 that is accommodated in the outer bag 1, and an inner bag that is accommodated in the inner bag 2. 3 and a valve 4 with a radioactive substance removing sheet that penetrates the upper part of the outer bag 1, the inner bag 2, and the inner bag 3.

  The outer bag 1 is sewed into a bag shape (cylindrical shape with a bottom) with a durable UV-resistant sheet material such as a woven fabric, and a plurality of (four in this example) outer lids divided in the circumferential direction are formed on the top. The piece 1a and one inner lid piece 1b located inside thereof are connected by stitching, and two suspension bands 1c are stitched and connected to the outer surface of the outer bag 1. And the 1st binding string 6 is penetrated along the free end side of each outer cover piece 1a, and this 1st binding string 6 is drawn and drawn, and the inner cover piece 1b is turned inside, and the outer cover piece The 1a group is folded toward the center of the container, and the upper end opening 1a of the outer bag 1 is closed.

  The inner bag 2 is made of a water-permeable film made of a flexible resin having no air permeability and water permeability. The inner bag 3 which is directly filled with the waste 5 is made of a water-permeable sheet made of a flexible resin that does not have air permeability and water permeability. The inner bag 2 and the inner bag 3 are formed in a bag shape (cylindrical shape with a bottom) having openings 2a and 3a.

  For the inner bag 3, a plastic sheet kneaded with barium sulfate is used. Since barium sulfate has been confirmed to have a radiation shielding effect, leakage of radiation from pollutants to the outside can be reduced.

  The valve 4 includes a male screw type 4a, a female screw type 4b, and a seat holding cap 4c. The male screw mold 4 a has a cylindrical shape having a through hole, and is attached so as to penetrate the upper portions of the outer bag 1, the inner bag 2, and the inner bag 3. A sheet holding cap 4c is attached to the bottom of the male screw mold 4a, and the circular sheet material 4d is sandwiched between the sheet holding cap 4c and the bottom of the male screw mold 4a. Thereby, the circular sheet material 4d is attached in a state of closing the through hole of the male screw mold 4a. The female screw mold 4b has a cap shape with the top closed, and the female screw mold 4b having such a shape is attached in a manner to be screwed into the top of the male screw mold 4a. As the circular sheet 4d, a radioactive material absorption / removal sheet in which a breathable sheet-like material such as a woven fabric, a nonwoven fabric, or a sponge sheet is impregnated or coated with a radioactive material adsorbent such as Prussian Blue is used. Yes. A plurality of ventilation holes are formed in the female screw mold 4b and the sheet holding cap 4c.

  The characteristics of Prussian Blue, which is a suitable example of the radioactive material adsorbent, will be described below. Bitumen is generally used as a blue pigment, but has excellent adsorption performance for radioactive substances (especially cesium), and also has the characteristics described below. Also known as an agent.

That is, bitumen is
・ Because the particles are insoluble in water, even if toxic substances (radioactive substances, etc.) are adsorbed and taken into the body of animals and plants, many parts are discharged outside the body without being absorbed into the body. The
-Although it is a particle that does not dissolve in water, it is a very fine particle (0.05-0.1 micron) and easily penetrates into the soil. Almost no transfer from soil to plants,
It has the following characteristics.

And bitumen is
・ Stable complex compounds that are not toxic and are excluded from poisons / deleterious substances under the Poisonous and Deleterious Substances Control Law.
Pyrolysis process, alkali decomposition process, after which easily decomposed by the decomposition treatment by soil bacteria, decomposition products harmless substance (yellow _{prussiate, NO 2, H 2 O,} CO 2, NO 3 -, SCN -, OCN ^-, and the like),
It can be safely used for human medicines and livestock feed.

  The safety of bitumen as described above includes various safety tests, namely acute toxicity test, subacute toxicity test, environmental toxicity test (carp acute toxicity test, medaka acute toxicity test, daphnia acute swimming inhibition test, algal growth inhibition test Etc.), and the safety is recognized, and it is certified as a highly safe coloring material in the Japanese Cosmetic Raw Material Standard.

  In the shelter bag A, the radioactive substance absorption / removal sheet carrying the bitumen having such a radioactive substance adsorption characteristic and safety is attached to the lower part of the valve 4 as a circular sheet 4c.

  Next, a method for storing radioactive material contaminated waste using the shelter bag A will be described. When waste such as soil contaminated with radioactive material is stored and stored using the shelter bag A, first, as shown in FIG. 3A, an appropriate amount of waste 5 is filled in the inner bag 3 and collected. Next, as shown in FIG. 3 (b), both the opening 3 a of the inner bag 3 and the opening 2 a of the inner bag 2 are squeezed together and bound by the second binding string 7. Next, as shown in FIG. 3 (c), the inner lid 1 b is overlapped on the center portion of the inner bag 2 to cover the narrowed portion s of the inner bag 2 and the inner bag 3 and the first binding string 6 is pulled. The outer lid 1a group is folded and squeezed to close the upper end opening 1a of the outer bag 1.

  When the contaminated waste 5 is stored in the shelter bag A in this manner, the valve 4 can be vented, so that the inner bag 2 and the inner bag 3 are ruptured by the gas generated inside the bag, or the generated gas is spontaneously ignited. There will be no situation where a fire of a shelterback A develops. In addition, radioactive substances such as cesium contained in air and generated gas that escape from the valve 4 to the outside are adsorbed and captured by the circular sheet 4c attached to the lower part of the valve 4, and the radioactive substance does not leak to the outside. Furthermore, the radiation emitted from the waste is shielded by barium sulfate kneaded in the inner bag 3, and leakage to the outside is greatly reduced.

[Other Examples]
The present invention can also be implemented in the following forms.

  (1) The structure is not limited to the two-layer structure of the inner bag 2 and the inner bag 3, and may be a single-sheet structure of the inner bag 3 depending on the material.

  (2) The upper end opening 1a of the outer bag 1 is not necessarily limited to the one provided with the outer lid piece 1a and the inner lid piece 1b, but the upper end opening 1a formed simply in a cylindrical shape is narrowed down into a purse-like shape and bound. Thus, the present invention can be implemented with a structure that closes.

  (3) If the mounting structure of the circular sheet (radioactive substance absorption removal sheet) 4c using the valve 4 described above is used, the radioactive substance absorption / removal sheet can be attached to the sealed work clothes worn by workers in the radioactive environment. . Then, the inside and outside of the sealed work clothes can be ventilated without exposing workers in the radioactive environment to the radiation outside the work clothes.

DESCRIPTION OF SYMBOLS 1 Outer bag 1a Upper end opening part 2 Middle bag 2a Opening part 3 Inner bag 3a Opening part 4 Valve 4a Male screw type 4b Female screw type 4c Sheet holding cap 4d Circular sheet (radioactive substance absorption removal sheet)
5 Waste

Claims (5)

An outer bag, an inner bag filled with contaminated waste and accommodated in the outer bag, a valve penetrating the outer bag and the inner bag,
The inner bag is made of a sheet material kneaded with barium sulfate having a radiation shielding effect, and has an air permeability and water impermeability property having an opening, and the opening is configured to be able to be squeezed and bound,
The valve is attached with a radioactive substance adsorption removal sheet to which a radioactive substance adsorbent is attached,
Shelter bag characterized by that. The valve is attached as a screw type,
The shelter bag according to claim 1. The valve is provided with a breathable seat material.
The shelter bag according to claim 1 or 2. The valve is attached so as to penetrate the upper part of the outer bag and the inner bag,
The shelter bag according to any one of claims 1 to 3. An intermediate bag is interposed between the outer bag and the inner bag.
The shelter bag according to any one of claims 1 to 4.

Images