JP2016212002A - Radioactive substance removal method and radioactive substance removal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radioactive substance removal method and a radioactive substance removal device that can collect contaminated water from soil contaminated with the radioactive substance and efficiently collect the contaminated water.SOLUTION: The present invention relates to a radioactive substance removal device which removes a radioactive substrate from soil 2 contaminated with the radioactive substance, the radioactive substance removal device comprising a filter container 3 having water permeability and buried in the soil 2 with an upper part exposed; water collection means 4 drawing contaminated water including the radioactive substance into the filter container 3; a filter material 5 holding immersion water in the filter container 3; and a grip 6 arranged at an upper part of the filter container 3, the radioactive substance being removed by drawing the contaminated water into the filter container 3 by the water collection means 4 and drawing the filter container 3 out of the soil 2 with the grip 6 for collection.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a radioactive substance removal method and a radioactive substance removal apparatus, and more particularly to a radioactive substance removal method and a radioactive substance removal apparatus capable of collecting and removing contaminated water containing radioactive substances from soil contaminated with radioactive substances.

  A radioactive substance is a radioactive isotope of a metal element such as an alkali metal, but it does not exist as a single element in soil moisture, and is a chemical compound called a salt that is ionically bonded to elements such as sulfuric acid in the atmosphere or soil. It exists in the form of a bond. In general, soil contains moisture in fine silty and clay constituting the components of the soil. In particular, after rainfall, the soil is in a moist state with a large amount of moisture due to the infiltration of rainwater and the increase in groundwater.

  In this way, in soil that contains a lot of water, the radioactive isotopes in the soil that have been ionically bound as salts are often ionized from the salt and dissolved in water as ions, and the contaminated water in the soil It is composed. Therefore, for soil contaminated with radioactive material, by applying an electric coulomb force to the contaminated water in the soil, the contaminated water is forced to move by electroosmosis and collected at a certain location. Can be water.

  As an invention for extracting ionized pollutants in soil using electroosmosis, an ionized pollutant is formed by inserting a cathode and an anode into the contaminated soil at an interval and applying a voltage to them. An apparatus that collects dissolved contaminated water at a cathode is known (for example, see Patent Document 1). In this device, it has a cylindrically formed cathode, a plurality of through holes are formed on the side surface of the cathode, contaminated water drawn to the cathode by the electroosmosis phenomenon is taken into the cathode from the through hole, The contaminated water taken into the cathode is pumped up by a vacuum pump.

JP 2003-31256 A

  By the way, in the conventional apparatus described above, the polluted water in which the pollutant in the soil is dissolved is drawn to the cylindrical cathode by the electroosmosis phenomenon, and the radioactive material is removed by pumping up the contaminated water taken in the cathode. Therefore, although the contaminated water taken in the inside of the cathode can be removed, the highly concentrated contaminated water drawn to the soil in the vicinity of the cathode (outside of the cathode) cannot be removed. That is, the contaminated water that has soaked into the surrounding soil cannot be removed simply by pumping the contaminated water in the cylindrical cathode, leaving room for improvement in terms of the efficiency of collecting the contaminated water.

  The present invention was devised in view of such problems, and a radioactive substance removal method and a radioactive substance removal apparatus capable of drawing and collecting efficiently contaminated water containing radioactive substance from soil contaminated with radioactive substance. The purpose is to provide.

  According to the present invention, there is provided a radioactive substance removing method for removing radioactive substances from soil contaminated with radioactive substances, wherein a filter container having water permeability is embedded so that an upper portion is exposed in the soil, Placing a filter material that retains moisture that has entered, drawing the contaminated water containing the radioactive substance into the filter container, and removing the radioactive substance by extracting the filter container from the soil and collecting it. A radioactive substance removing method is provided.

  Further, according to the present invention, a radioactive substance removing device that removes radioactive substances from soil contaminated with radioactive substances, having a water permeability and a filter container embedded so that the upper part is exposed to the soil, A water collecting means for drawing contaminated water containing the radioactive substance into the filter container, a filter material for retaining moisture that has entered the filter container, and a handle disposed on the upper part of the filter container, The radioactive substance is removed by drawing the contaminated water into the filter container by a water collecting means, and extracting and collecting the filter container from the soil using the handle. A radioactive substance removal apparatus is provided.

  The water collecting means may include a suction pipe inserted into the filter container from above, a suction pump connected to the suction pipe, and a contaminated water tank connected to the suction pump. The water collecting means includes a cathode rod inserted into the filter container from above, an anode rod inserted into the soil at a distance from the filter container, and a space between the cathode rod and the anode rod. And a power supply means for applying a voltage to the power supply. Moreover, it is preferable to supply the electric power to the said water collection means with a solar power generation device, a wind power generation device, or another renewable energy power generation device.

  According to the radioactive substance removing method and the radioactive substance removing apparatus according to the present invention, the contaminated water containing the radioactive substance is drawn from the soil into the filter container and held in the filter material, and the contaminated water is recovered together with the filter container. Therefore, the contaminated water left on the outer periphery of the filter container can be reduced, and the contaminated water containing the radioactive substance can be drawn from the soil contaminated with the radioactive substance and efficiently recovered.

It is a sectional side view of the radioactive substance removal apparatus which concerns on 1st embodiment of this invention. It is a schematic block diagram of the radioactive substance removal system which used multiple radioactive substance removal apparatuses shown in FIG. It is a sectional side view of the radioactive substance removal apparatus which concerns on 2nd embodiment of this invention. It is a schematic block diagram of the radioactive substance removal system using multiple radioactive substance removal apparatuses shown in FIG. It is a top view which shows arrangement | positioning of the anode rod and cathode rod which were shown in FIG. 4, (a) is a 1st arrangement example, (b) is a 2nd arrangement example, (c) is a 3rd arrangement example, (d) is The 4th example of arrangement is shown.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. .

  The radioactive substance removal apparatus 1 which concerns on 1st embodiment of this invention is a radioactive substance removal apparatus which removes a radioactive substance from the soil 2 contaminated with the radioactive substance, as shown in FIG. 1, and has water permeability. A filter container 3 embedded in the soil 2 so that the upper part is exposed; a water collecting means 4 that draws contaminated water containing a radioactive substance into the filter container 3; and a filter material that retains moisture that has entered the filter container 3. 5 and a handle 6 disposed at the upper part of the filter container 3, the contaminated water is drawn into the filter container 3 by the water collecting means 4, and the filter container 3 is extracted from the soil 2 using the handle 6 and collected. By doing so, radioactive substances are removed.

  The soil 2 is, for example, agricultural land, forest land such as mountain forests, residential land such as residential areas and industrial areas, public land such as roads and parks, etc. that are contaminated by radioactive substances such as cesium and strontium. Soil 2 includes the ground of the reactor building and the surrounding land. Moreover, the soil 2 is not necessarily limited to the place where the soil is exposed, and may be a place where the filter container 3 can be embedded by penetrating or removing asphalt or concrete.

  In the present embodiment, the radioactive substance is removed as contaminated water together with the moisture in the soil 2. Therefore, the soil 2 is preferably moist soil or soil that can retain water. Of course, when the soil 2 is dry, the soil 2 may be forcedly moistened by spraying or pouring water.

  For example, as shown in FIG. 1, the filter container 3 is an elongated bottomed container formed of a metal such as stainless steel, and a plurality of holes 31 for taking in contaminated water are formed through at least the side surface. ing. The cross-sectional shape of the filter container 3 may be a circle or a polygon such as a triangle or a rectangle. The hole 31 may be formed on the bottom surface. The illustrated filter container 3 is a metal container, but by forming the holes 31, moisture on the outer periphery of the filter container 3 can enter the filter container 3 and has water permeability. The diameter of the hole 31 can be arbitrarily set according to the properties of the soil 2, and is set to about 1 to 10 mm, for example.

  The filter container 3 is not limited to the above-described metal container, and may be a bag made of synthetic fibers and natural fibers with high water permeability, or a resin container having porosity. Good. That is, the filter container 3 may have a water permeability that allows moisture to enter, and has a rigidity that prevents the filter material 5 from falling off when the filter container 3 is pulled up from the soil 2.

  The filter container 3 is embedded in the soil 2 so that the upper part protrudes from the surface (the ground surface 21) of the soil 2, and the upper part is opened to the atmosphere. With this configuration, it is possible to suppress the intrusion of rainwater or the like flowing on the ground surface 21 into the filter container 3, and it is possible to suppress a decrease in the concentration or overflow of contaminated water drawn into the filter container 3. When the filter container 3 is embedded, the excavation hole 22 is formed in the soil 2 in advance, and after the filter container 3 is inserted into the excavation hole 22, the gap between the excavation hole 22 and the filter container 3 is filled with soil. Good.

  As shown in the drawing, a plurality of handles 6 are attached to the upper portion of the filter container 3. The handle 6 is connected at an appropriate interval in the circumferential direction along, for example, the upper opening of the filter container 3. By disposing such a handle 6 in the filter container 3, it is possible to simplify the transfer and burying work of the filter container 3, and it is possible to easily pull the filter container 3 when it is pulled out. When the filter container 3 is small or light, an operator can hold the handle 6, and when the filter container 3 is large or heavy, the operator can pull it by a lifting device such as a crane.

  For example, as shown in FIGS. 1 and 2, the water collecting means 4 includes a suction pipe 7 inserted into the filter container 3 from above, a suction pump 8 connected to the suction pipe 7, and a suction pump 8. And a connected contaminated water tank 9. The radioactive substance removal system shown in FIG. 2 has a plurality of radioactive substance removal apparatuses 1 embedded in one surface of soil 2. The radioactive substance removing device 1 according to the present embodiment can be used alone or in a systematic manner using a plurality according to the installation location and application.

  For example, the suction pipe 7 has a length of 6 m or less and a diameter of 10 cm or less, but is not limited thereto. The suction pipe 7 is configured to have a diameter of about 1/3 to 1/20 times that of the filter container 3. Since the suction pipe 7 is inserted into the filter container 3, more contaminated water can be collected in the filter container 3 by reducing the volume ratio of the suction pipe 7 to the filter container 3. As the material of the suction pipe 7, a material having strength that can withstand vacuuming such as metal or resin is used. Further, since the suction pipe 7 is exposed to contaminated water, a material having corrosion resistance may be used, or a corrosion-resistant coating may be applied.

  A suction port 71 for sucking contaminated water is formed at the lower end of the suction pipe 7. A cap 73 having a filter 72 made of a metal mesh, a resin mesh, a cloth, or the like is attached to the suction port 71 so that foreign matter such as the filter material 5 is not sucked. In addition, the suction inlet 71 may be formed in the side surface of the suction pipe 7, and is comprised by the through-hole of several small diameters in this case, for example. The upper end of the suction pipe 7 is connected to the drain pipe 11 via a flange 74.

  A filter material 5 for holding contaminated water sucked by the suction pipe 7 is accommodated inside the filter container 3. The filter material 5 is, for example, sand, gravel, gravel or the like having high water permeability, and is filled in the filter container 3. A material having a water absorption property (resin material, porous material, etc.) may be used as the filter material 5. The filter material 5 permeates the contaminated water that has entered the filter container 3 into the inside of the filter container 3 by capillarity and retains the contaminated water in the filter container 3 to suppress leakage to the outside. Further, the filter material 5 appropriately closes the suction port 71 of the suction pipe 7 and supports the function of maintaining the degree of vacuum (negative pressure) in the suction pipe 7 and the suction pipe 7 at the center in the filter container 3. Has the function of

  As the filter material 5, fine sand and gravel 51 are densely arranged at the bottom of the filter container 3 (below the suction port 71 of the suction pipe 7), and coarse gravel and gravel 52 are arranged thereon. Good. Thus, by arranging the particle diameter of the filter material 5 in an inclined manner, the water retention can be increased and the degree of vacuum in the suction pipe 7 can be easily maintained. Here, although the case where the filter material 5 is inclined and arranged in two stages has been described, the filter material 5 may be inclined and arranged in three or more stages, or the properties of the filter material 5 may be changed and arranged in multiple layers. May be.

  As shown in FIG. 2, for example, a plurality of filter containers 3 are embedded in the soil 2. In FIG. 2, for convenience of explanation, the soil 2 is illustrated in three stages, but actually, the soil 2 on the same plane is illustrated. A suction pipe 7 is inserted into each filter container 3 from above, and a drain pipe 11 is connected to the suction pipe 7. The contaminated water sucked up by the suction pipe 7 from the filter container 3 is collected in the contaminated water tank 9 via the drain pipe 11.

  The drain pipe 11 includes, for example, a pipe header 111 connected to the suction pipe 7 and a header mother pipe 112 connected to the pipe header 111. As shown in FIG. 1, the pipe header 111 is constituted by, for example, a T-shaped pipe including a leg part 111a and an arm part 111b. The leg portion 111a of the pipe header 111 is connected to the flange 74 of the suction pipe 7 by bolts / nuts or the like. The arm portions 111b of the adjacent pipe headers 111 are connected via a pipe joint 111c, and the end portion of the most upstream pipe header 111 is closed. When the distance from the pipe header 111 to the header mother pipe 112 is long, a plurality of pipes may be added.

  As shown in FIG. 2, the header mother pipe 112 is provided with a suction pump 8 for sucking up contaminated water. The suction pump 8 is a so-called vacuum pump and has a capacity capable of appropriately evacuating each suction pipe 7. A contaminated water tank 9 is connected to the downstream side of the header mother pipe 112. The contaminated water tank 9 is preferably configured to prevent leakage of radioactive substances. For example, the contaminated water tank 9 is configured to be able to enclose contaminated water with a material having a high radiation shielding effect such as concrete or steel plate concrete. Moreover, the contaminated water tank 9 may be a water tank or a tank disposed in a building having a high radiation shielding effect.

  The drain pipe 11 may be provided with an opening / closing valve 113 as required so that the suction pipe 7 for collecting the contaminated water can be arbitrarily selected, or a check valve 114 may be provided as necessary. The backflow of contaminated water may be suppressed. Further, a drain valve 115 and a drain receiver 116 may be arranged on the upstream side of the suction pump 8 as necessary. In addition, the structure of the drain pipe 11 is not limited to what was shown in figure, It can change suitably according to arrangement | positioning, the number, etc. of the suction pipe 7. FIG.

  As shown in FIG. 2, the suction pump 8 is connected with power supply means 10 that applies a driving force. The power supply means 10 is preferably constituted by, for example, a solar power generation device, a wind power generation device, or another renewable energy power generation device, but may be a storage battery or a prime mover. In particular, when renewable energy power generation is used as the power supply means 10, power is constantly supplied to the suction pump 8 even in places where power infrastructure facilities are not provided or where it is difficult to supply fuel. Can be supplied. The power supplied by the power supply means 10 is not limited to the supply to the suction pump 8, but is applied to all devices that require power, such as the on-off valve 113, the check valve 114, and the drain valve 115. Can be supplied.

  According to the above-described radioactive substance removing device according to the present embodiment, the filter container 3 is buried in the soil 2 and the suction pipe 7, the drain pipe 11, the suction pump 8, the contaminated water tank 9, etc. are laid, and then the power supply means 10. By operating the suction pump 8, moisture including contaminated water of the soil 2 is drawn toward the filter container 3 and enters the filter container 3 from the hole 31. The contaminated water that has entered the filter container 3 is retained by the filter material 5 and retained in the filter container 3. The retained contaminated water is sucked into the suction pipe 7 by the suction force of the suction pump 8 and is collected in the contaminated water tank 9 through the drain pipe 11. By collecting the contaminated water that has entered the filter container 3 in the contaminated water tank 9, saturation of the water retention performance of the filter material 5 can be suppressed.

  After sufficiently collecting the contaminated water of the soil 2, the filter container 3 is finally pulled out from the soil 2 and collected together with the filter material 5. As described above, the contaminated water containing the radioactive substance from the soil 2 is drawn into the filter container 3 and held in the filter material 5, and the contaminated water is collected together with the filter container 3, so that it remains on the outer periphery of the filter container 3. Contaminated water can be reduced, and the contaminated water containing the radioactive substance can be attracted from the soil 2 contaminated by the radioactive substance and efficiently recovered. The recovered filter container 3 may be reused by replacing the filter material 5 after decontamination.

  According to the radioactive substance removing apparatus according to the present embodiment described above, the filter container 5 having water permeability is embedded in the soil 2 so that the upper portion is exposed, and the filter material 5 that retains moisture that has entered the filter container 3 is provided. The radioactive substance removing method of removing the radioactive substance can be easily realized by arranging, drawing the contaminated water containing the radioactive substance into the filter container 3, and extracting the filter container 3 from the soil 2 and collecting it.

  Next, the radioactive substance removal apparatus 1 which concerns on 2nd embodiment of this invention is demonstrated using FIGS. As shown in FIG. 3, the radioactive substance removing device 1 according to the second embodiment has the same basic configuration as the radioactive substance removing device 1 according to the first embodiment shown in FIG. The configuration of 4 is different. The water collecting means 4 in the first embodiment uses the suction force of the suction pump 8, whereas the water collecting means 4 in the second embodiment uses an electroosmotic phenomenon due to Coulomb force. is there.

  The water collecting means 4 in the second embodiment includes a cathode bar 12 inserted into the filter container 3 from above, an anode bar 13 inserted into the soil 2 at a distance from the filter container 3, a cathode bar 12 and an anode. Power supply means 14 for applying a voltage between the rod 13 and the bar 13. The cathode rod 12 and the anode rod 13 can collect water by arranging at least one pair, but a plurality of cathode rods 12 and anode rods 13 may be arranged as shown in FIG.

  The cathode bar 12 is inserted into the filter material 5 in the filter container 3 and positioned. Although the length of the part inserted in the filter material 5 of the cathode rod 12 is about 1-5 m, for example, it is not limited to this. As the material of the cathode bar 12, a conductive metal such as steel, stainless steel, titanium or the like is used. A terminal 121 having an L-shaped cross section is welded to the side surface of the exposed portion of the cathode bar 12 on the ground. The cathode 121 shown in FIG. 4 is connected to the terminal 121 so that a negative voltage is applied to the cathode rod 12.

  On the other hand, the anode bar 13 is inserted into the soil 2 at a distance from the filter container 3 into which the cathode bar 12 is inserted. The length of the portion of the anode rod 13 inserted into the soil 2 is set to be the same as the length of the cathode rod 12. As the material of the anode rod 13, a conductive metal such as steel, stainless steel or titanium is used. The anode wire 16 shown in FIG. 4 is connected to the anode rod 13, and a positive voltage is applied to the anode rod 13.

  For example, as shown in FIG. 4, the power supply means 14 for applying a voltage to the cathode bar 12 and the anode bar 13 includes a power generation means 141 for generating power, and an AC / DC converter 142 for converting alternating current into direct current. A DC power supply device 143 that controls the DC current and voltage converted by the AC / DC converter 142, and a minus terminal box 144 and a plus terminal box 145 connected to the DC power supply device 143. Note that the configuration of the power supply means 14 is not limited to the illustrated configuration, and any other configuration can be used as long as an appropriate voltage can be applied between the cathode rod 12 and the anode rod 13. Good.

  The power generation unit 141 is preferably, for example, a solar power generation device, a wind power generation device, or another renewable energy power generation device, but may be a storage battery or a prime mover. In particular, when a renewable energy power generation device is used as the power generation means 141, the radioactive material removal system is constantly supplied with power even in places where power infrastructure facilities are not available or where it is difficult to supply fuel. Can be supplied. The electric power supplied by the power generation means 141 is not limited to the supply to the cathode rod 12 and the anode rod 13, but can be supplied to all devices that require electric power in the radioactive substance removal system.

  The electric capacities (current and voltage) of the AC / DC converter 142 and the DC power supply device 143 are adjusted according to the numbers and lengths of the cathode bar 12 and the anode bar 13 and are appropriately large for the cathode bar 12 and the anode bar 13. It is comprised so that the voltage of this length can be applied. The minus terminal in the minus terminal box 144 is connected to the cathode rod 12 via the cathode electric wire 15, and the plus terminal in the plus terminal box 145 is connected to the anode rod 13 via the anode electric wire 16.

  The power supply means 14 has one or more of a half-wave rectified waveform, a full-wave rectified waveform, a pulse waveform, and an AC waveform in addition to the above-described function of generating direct current by the AC / DC converter 142 and the direct-current power supply device 143. It may have a function of generating a waveform current. By applying these alternating voltages between the cathode rod 12 and the anode rod 13, pulsation or impulse can be given to the soil 2 between the cathode rod 12 and the anode rod 13. Can be collected easily.

  According to the radioactive substance removing apparatus according to the second embodiment described above, the filter container 3 is embedded in the soil 2, and the cathode rod 12, the anode rod 13, the drain pipe 11, the power supply means 14, etc. are laid, and then the power is supplied. By applying a predetermined voltage between the cathode bar 12 and the anode bar 13 by the means 14, moisture including contaminated water in the soil 2 is drawn toward the filter container 3, and the hole 31 enters the filter container 3. Infiltrate. The contaminated water that has entered the filter container 3 is retained by the filter material 5 and retained in the filter container 3.

  Specifically, the cathode rod 12 and the anode rod 13 inserted into the soil 2 are charged as electrodes of one electric circuit, and are ionized into moisture in the soil 2 between the cathode rod 12 and the anode rod 13. The dissolved radioactive material is attracted to the cathode rod by electroosmosis as contaminated water. The potential gradient between the cathode bar 12 and the anode bar 13 is adjusted so as to have an appropriate value of, for example, 0.1 V / cm or more.

  And before the water retention performance of the filter material 5 is saturated, the filter container 3 is extracted from the soil 2 and collected together with the filter material 5. As described above, the contaminated water containing the radioactive substance from the soil 2 is drawn into the filter container 3 and held in the filter material 5, and the contaminated water is collected together with the filter container 3, so that it remains on the outer periphery of the filter container 3. Contaminated water can be reduced, and the contaminated water containing the radioactive substance can be attracted from the soil 2 contaminated by the radioactive substance and efficiently recovered. The recovered filter container 3 may be reused by replacing the filter material 5 after decontamination.

  Also by the radioactive substance removing apparatus according to the second embodiment described above, the filter container 3 having water permeability is embedded in the soil 2 so that the upper part is exposed, and the filter material 5 that retains moisture that has entered the filter container 3 is provided. The radioactive substance removing method of removing the radioactive substance can be easily realized by arranging, drawing the contaminated water containing the radioactive substance into the filter container 3, and extracting the filter container 3 from the soil 2 and collecting it.

  In the second embodiment described above, a porous material such as zeolite may be used as the filter material 5. Since the entire crystal lattice is negatively charged and has an ion exchange capacity, zeolite can adsorb and hold an ionized radioactive substance. Of course, zeolite may be used in the first embodiment.

  Here, FIGS. 5A to 5D show arrangement examples of the cathode bar 12 and the anode bar 13. Broken line arrows in the figure indicate the flow of contaminated water that moves due to the electroosmosis phenomenon. In the first arrangement example shown in FIG. 5A, the cathode bars 12 and the anode bars 13 are alternately arranged in a line. In the second arrangement example shown in FIG. 5B, the cathode bars 12 and the anode bars 13 are alternately arranged in a grid pattern. According to this second arrangement example, the electroosmosis phenomenon can be applied even between adjacent rows as compared with the first arrangement example, and contaminated water can be collected efficiently and uniformly.

  In the third arrangement example shown in FIG. 5C, a plurality of anode rods 13 are arranged on the same radius with the cathode rod 12 as the center. According to this third arrangement example, contaminated water can be collected in one place, and the burden of piping work and wastewater treatment can be reduced. In the fourth arrangement example shown in FIG. 5D, a plurality of cathode rods 12 are arranged on the same radius with the anode rod 13 as the center. According to this fourth arrangement example, water can be collected efficiently even when the amount of contaminated water is large.

  In each arrangement example, the distance between the cathode bar 12 and the anode bar 13 is set to about 2 to 10 m, for example. In each figure, the case where the total number of cathode bars 12 and anode bars 13 is nine is shown, but the present invention is not limited to this. Conditions such as the number, spacing, insertion depth, arrangement, and applied voltage of the anode rod 13 and the cathode rod 12 are appropriately changed depending on the topography of the installation site, the properties of the soil 2, the contamination status, and the like.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and various modifications within the scope of the claims. Needless to say, examples or modifications also belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Radioactive substance removal apparatus 2 Soil 3 Filter container 4 Water collecting means 5 Filter material 6 Handle 7 Suction pipe 8 Suction pump 9 Contaminated water tank 10, 14 Power supply means 11 Drain pipe 12 Cathode bar 13 Anode bar 15 Cathode wire 16 Anode wire 21 Ground surface 22 Drilling hole 31 Hole 51 Gravel 52 Gravel 71 Suction port 72 Filter 73 Cap 74 Flange 111 Pipe header 111a Leg part 111b Arm part 111c Pipe joint 112 Header mother pipe 113 On-off valve 114 Check valve 115 Drain valve 121 Terminal 141 Power generation means 142 AC / DC converter 143 DC power supply device 144 Negative terminal box 145 Positive terminal box

Claims (5)

A method for removing radioactive material from soil contaminated with radioactive material, comprising:
Embed a filter container having water permeability so that the upper part is exposed in the soil,
Place a filter material that retains moisture that has entered the filter container,
Draw the contaminated water containing the radioactive substance into the filter container,
By removing the radioactive material by pulling out the filter container from the soil and collecting it,
The radioactive substance removal method characterized by the above-mentioned. A radioactive substance removal device for removing radioactive substances from soil contaminated with radioactive substances,
A filter container that has water permeability and is embedded so that the top is exposed in the soil;
Water collecting means for drawing contaminated water containing the radioactive substance into the filter container;
A filter material that retains moisture that has entered the filter container;
A handle disposed at the top of the filter container,
The radioactive material is removed by pulling the contaminated water into the filter container by the water collecting means, and extracting and collecting the filter container from the soil using the handle.
The radioactive substance removal apparatus characterized by the above-mentioned.   The water collecting means includes a suction pipe inserted into the filter container from above, a suction pump connected to the suction pipe, and a contaminated water tank connected to the suction pump. Item 2. The radioactive substance removing device according to Item 1.   The water collecting means includes a cathode bar inserted into the filter container from above, an anode bar inserted into the soil at a distance from the filter container, and a voltage between the cathode bar and the anode bar. The radioactive substance removing apparatus according to claim 1, further comprising: The radioactive material according to any one of claims 2 to 4, wherein power to the water collecting means is supplied by a solar power generation device, a wind power generation device, or another renewable energy power generation device. Removal device.