JP2015190793A - Device and method for storing contaminated water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for storing contaminated water, capable of inhibiting the contaminated water from leaking to the outside.SOLUTION: A device for storing contaminated water includes: an inner shell 11 which forms a hollow shape and can store the contaminated water containing a radioactive substance in the inside thereof: an outer shell 12 arranged in the outside of the inner shell 11; and a detection device 13 which detects leakage of the contaminated water from the inner shell 11 to the outer shell 12.

Description

  The present invention relates to a contaminated water storage device and method for storing contaminated water containing radioactive substances.

  For example, when an accident occurs in a nuclear power plant, contaminated water containing radioactive substances is generated. The generated contaminated water is temporarily stored in a storage tank, and radioactive substances are sequentially removed from the contaminated water using a treatment device. The removed radioactive substances are stored in a storage container, while the radioactive substances are removed. Water is released into rivers.

  As a contaminated water storage device, for example, there is one described in Patent Document 1 below. The liquid storage tank described in Patent Document 1 is obtained by sequentially stacking cylindrical members and joining them together by a mechanical coupler at a joint portion.

JP 2013-035599 A

  Although the conventional contaminated water storage device stores contaminated water inside, the tank outer plate constituting the storage device is bolted, so the contaminated water leaks to the outside due to loose bolts or rust. There is a risk. In addition, since the tank is installed outdoors, it is difficult to distinguish between the leakage of contaminated water and rainwater, and it is difficult to properly detect the leakage of contaminated water.

  This invention solves the subject mentioned above, and aims at providing the storage apparatus and method of contaminated water which can suppress the external leakage of contaminated water.

  In order to achieve the above object, a contaminated water storage apparatus according to the present invention comprises a hollow inner shell capable of storing contaminated water containing a radioactive substance therein, and an outer shell disposed outside the inner shell. And a detection device that detects leakage of contaminated water from the inner shell to the outer shell.

  Therefore, the contaminated water containing radioactive material is stored in the inner shell with the outer shell on the outside, so even if the contaminated water leaks from the inner shell, it can be received by the outer shell. Moreover, since the detection device detects the leakage of contaminated water from the inner shell to the outer shell, the leakage of contaminated water from the inner shell can be detected at an early stage.

  In the contaminated water storage device of the present invention, the detection device is provided in a gap between the inner shell and the outer shell, and detects leakage of contaminated water from the inner shell to the gap. Yes.

  Accordingly, since the detection device is provided in the gap between the inner shell and the outer shell and detects leakage of contaminated water into the gap, leakage of contaminated water from the inner shell can be detected at an early stage.

  In the contaminated water storage apparatus of the present invention, the inner shell and the outer shell constitute a hull having a double hull structure.

  Therefore, since the existing equipment is used by storing the contaminated water using the hull having the double hull structure, a significant increase in cost can be suppressed.

  In the contaminated water storage apparatus according to the present invention, the hull is arranged in a dock, and the periphery is supported by a filling member up to the water line.

  Therefore, the strength is improved by arranging the hull in the dock and supporting the periphery to the water line, and a sufficient amount of contaminated water can be stored in the inner shell.

  In the contaminated water storage device of the present invention, a floating body having a double hull structure is constituted by the inner shell and the outer shell, the floating body is moored on the sea, and a gap between the inner shell and the outer shell is filled with air. It is characterized by being able to float.

  Therefore, since a floating body having a double hull structure is constructed and moored on the sea, it is not necessary to secure an arrangement place on land, and a sufficient amount of contaminated water can be stored.

  In the contaminated water storage device of the present invention, a seawater supply / exhaust port capable of supplying and discharging seawater to and from the gap and an air supply / exhaust port capable of supplying and discharging air to the gap are provided. Yes.

  Therefore, for example, when a tsunami occurs, seawater is supplied to the gap from the seawater supply / exhaust port and the internal air is discharged from the air supply / exhaust port, so that the floating body can be settled and damage caused by the tsunami can be suppressed. it can.

  Further, the contaminated water storage method of the present invention includes a step of navigating a ship having a gap between an outer shell and an inner shell to a dock, a step of supporting the hull in the dock, Filling the inside shell of the supported hull with contaminated water.

  Therefore, since contaminated water containing radioactive substances is stored in the gap between the outer shell and inner shell, even if contaminated water leaks from the inner shell, it can be received by the outer shell. Further, by storing contaminated water using a hull having a double hull structure, since existing facilities are used, a significant increase in cost can be suppressed.

  According to the contaminated water storage device of the present invention, an inner shell capable of storing contaminated water containing radioactive substances therein, an outer shell disposed outside the inner shell, and contamination from the inner shell to the outer shell. Since the detection device for detecting leakage of water is provided, external leakage of contaminated water can be suppressed, and leakage of contaminated water from the inner shell can be detected at an early stage.

  According to the method for storing contaminated water of the present invention, the step of navigating a ship having a gap between the outer shell and the inner shell to the dock, the step of supporting the hull in the dock, and the support in the dock And a step of filling the inner shell of the hull with the contaminated water is provided, so that external leakage of the contaminated water can be suppressed.

FIG. 1 is a schematic diagram illustrating a contaminated water storage device according to the first embodiment. FIG. 2 is a schematic view for explaining a method for storing contaminated water. FIG. 3 is a schematic view for explaining a method for storing contaminated water. FIG. 4 is a schematic diagram showing a harbor portion where the contaminated water storage device of the second embodiment is arranged. FIG. 5 is a schematic diagram showing a storage device for contaminated water. FIG. 6 is a plan view of a storage tank for contaminated water. FIG. 7 is a cross-sectional view of a contaminated water storage tank. FIG. 8 is a schematic diagram illustrating a contaminated water storage device according to the third embodiment. FIG. 9 is a schematic diagram illustrating the operation of the contaminated water storage device.

  Exemplary embodiments of a contaminated water storage apparatus and method according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, and when there are two or more embodiments, what comprises combining each embodiment is also included.

[First Embodiment]
FIG. 1 is a schematic diagram illustrating a contaminated water storage device according to the first embodiment, and FIGS. 2 and 3 are schematic diagrams for explaining a contaminated water storage method.

  In the first embodiment, as shown in FIG. 1, the contaminated water storage device 10 can store a contaminated water containing a radioactive substance using a ship body by putting a ship in a dock. The contaminated water storage device 10 includes an inner shell 11, an outer shell 12, and a detection device 13.

  The contaminated water storage device 10 is configured by forming a hull 14 having a double hull structure with an inner shell 11 and an outer shell 12. The inner shell 11 has a hollow shape and can store contaminated water containing a radioactive substance therein. The inner shell 11 is formed with a plurality of tanks 22 by partition walls 21, and each tank 22 is formed with a supply port 23 capable of supplying contaminated water at the top, and can be opened and closed by a lid 24.

  The outer shell 12 is disposed outside the inner shell 11 with a space (gap) 25 having a predetermined distance. The outer shell 12 is disposed at least below and around the inner shell 11, and the space portion 25 can be normally used as a ballast tank. The inner shell 11 and the outer shell 12 are provided with a support member (not shown) between them. The hull 14 is provided with a bridge 27 at the rear of the deck 26.

  The hull 14 is disposed in the dock 31 and is supported by a filling member 33 (water, earth and sand, concrete, etc.) 33 up to the water line 32. In this case, after the hull 14 enters the dock 31, the hull 14 is supported by filling the gap 33 with the filling member 33.

  The contaminated water storage device 10 is provided with a detection device 13 for detecting leakage of contaminated water from the inner shell 11 to the outer shell 12. The detection device 13 is provided in a space portion 25 provided between the inner shell 11 and the outer shell 12, and can detect leakage of contaminated water from the inner shell 11 to the space portion 25. The detection device 13 is connected to a management device 34 provided outside (or inside) the hull 14, and the management device 34 is connected to an alarm device 35. Therefore, when the detection device 13 detects contaminated water in the space portion 25, a detection signal is output to the management device 34, and the management device 34 activates the alarm device 35.

  Here, the storage method of the contaminated water of 1st Embodiment is demonstrated. The method for storing contaminated water according to the first embodiment includes a step of navigating a ship provided with a space portion 25 between the inner shell 11 and the outer shell 12 to the dock 31, and a step of supporting the hull 14 in the dock 31. And filling the contaminated water into the inner shell 11 of the hull 14 supported in the dock 31.

  Specifically, as shown in FIG. 2, the ship is, for example, a used tanker, sails on the sea to the dock 31, and causes the hull 14 to enter the dock 31. At this time, the hull 14 that has entered the dock 31 is filled with the filling member 33 up to the water line 32 in the gap between the dock 31 and the hull 14, so that the hull 14 is appropriately supported in the dock 31. Then, the hose 37 of the contaminated water filling device 36 provided in the dock 31 is connected to the supply port 23 and the contaminated water filling device 36 is operated to fill the tank 22 constituted by the inner shell 11 with the contaminated water. .

  The hull 14 stores the contaminated water as a storage device in the dock 31 in a state where all the tanks 22 are filled with the contaminated water. While the contaminated water is stored by the hull 14, the detection device 13 detects the leakage of the contaminated water to the space portion 25, and when the detection device 13 detects the contaminated water in the space portion 25, the management device 34 activates the alarm 35 to notify the operator. Therefore, the operator specifies the tank 22 in which the contaminated water has leaked, and replaces the contaminated water with the safe tank 22.

  As described above, in the contaminated water storage device according to the first embodiment, the inner shell 11 that has a hollow shape and can store the contaminated water containing the radioactive substance therein is disposed outside the inner shell 11. An outer shell 12 and a detection device 13 for detecting leakage of contaminated water from the inner shell 11 to the outer shell 12 are provided.

  Therefore, since the contaminated water containing the radioactive substance is stored in the inner shell 11 in which the outer shell 12 is disposed outside, the outer shell 12 can catch the contaminated water even if the contaminated water leaks from the inner shell 11. External leakage of water can be suppressed. Further, since the detection device 13 detects the leakage of contaminated water from the inner shell 11 to the outer shell 12, the leakage of contaminated water from the inner shell 11 can be detected at an early stage.

  In the contaminated water storage device of the first embodiment, the detection device 13 provides a space 25 between the inner shell 11 and the outer shell 12 to detect leakage of contaminated water from the inner shell 11 to the space 25. ing. Therefore, since the detection device 13 is provided in the space 25 between the inner shell 11 and the outer shell 12 to detect the leakage of contaminated water, the leakage of the contaminated water from the inner shell 11 can be detected at an early stage. it can. Further, only one detection device 13 may be used for the plurality of tanks 22, and the device can be simplified and reduced in cost.

  In the polluted water storage device of the first embodiment, the inner shell 11 and the outer shell 12 constitute a hull 14 having a double hull structure. Therefore, since the existing equipment is used by storing the contaminated water using the hull 14 having the double hull structure, a significant increase in cost can be suppressed. Moreover, further cost reduction can be achieved by using a used ship.

  In the contaminated water storage apparatus according to the first embodiment, the hull 14 is arranged in the dock 31 and the filling member 33 is filled and supported up to the water line 32. Therefore, the support strength of the hull 14 can be improved by arranging the hull 14 on the dock 31 and supporting it, and a sufficient amount of contaminated water can be stored in the inner shell 11.

  In the contaminated water storage method according to the first embodiment, the step of navigating the ship (hull 14) in which the space portion 25 is provided between the outer shell 12 and the inner shell 11 to the dock 31; A process of supporting the hull 14 inside, and a process of filling the inner shell 11 of the hull 14 supported in the dock 31 with contaminated water.

  Therefore, since the contaminated water containing the radioactive substance is stored in the space portion 25 between the outer shell 12 and the inner shell 11, even if the contaminated water leaks from the inner shell 11, it is received by the outer shell 12. External leakage of the contaminated water can be suppressed, and since the existing equipment is used by storing the contaminated water using the hull 14 having the double hull structure, a significant increase in cost can be suppressed.

[Second Embodiment]
FIG. 4 is a schematic diagram showing a harbor portion where the contaminated water storage device of the second embodiment is arranged, FIG. 5 is a schematic diagram showing the contaminated water storage device, and FIG. 6 is a plan view of the contaminated water storage tank. FIG. 7 and FIG. 7 are cross-sectional views of a storage tank for contaminated water.

  In 2nd Embodiment, as shown in FIG. 4, the storage device 40 of contaminated water can store the contaminated water containing a radioactive substance using the storage tank moored in a harbor part.

  A harbor 44 is formed by two breakwaters 42 and 43 with respect to the land 41. As shown in FIG. 5, the contaminated water storage device 40 is configured by a plurality of storage tanks 50 being connected by a connecting member 45 and moored in a harbor 44 in the breakwater 43.

  As shown in FIGS. 6 and 7, the storage tank 50 is configured by forming a double hull floating body with an inner shell 51 and an outer shell 52. The inner shell 51 has a hollow shape and can store contaminated water containing a radioactive substance therein. The inner shell 51 has a plurality of tanks 62 formed by partition walls 61. Each tank 62 is provided with a supply port 63 capable of supplying contaminated water at the top, and can be opened and closed by a lid 64. A portion 65 is provided.

  The outer shell 52 is disposed outside the inner shell 51 with a space (gap) 66 having a predetermined distance. The outer shell 52 is disposed at least below and around the inner shell 51, and the space portion 66 is filled with air so that buoyancy acts and the storage tank 50 can float. The space portion 66 is divided corresponding to the plurality of tanks 62 by partition walls 61 extending from the inner shell 51. The inner shell 51 and the outer shell 52 are provided with a support member (not shown) between them.

  The storage tank 50 is provided with a detection device 53 that detects leakage of contaminated water from the inner shell 51 to the outer shell 52. The detection device 53 is provided in a space 66 provided between the inner shell 51 and the outer shell 52, and can detect leakage of contaminated water from the inner shell 51 to the space 66. In this case, since the inner shell 51 is divided into a plurality of tanks 62 and the space portions 66 are provided corresponding to the tanks 62, the detection devices 53 are provided corresponding to the space portions 66. ing. Each detection device 53 is connected to a management device 54 provided outside the storage tank 50, and an alarm device 55 is connected to the management device 54. Therefore, when the detection device 53 detects contaminated water in the space 66, it outputs a detection signal to the management device 54, and the management device 54 activates the alarm device 55.

  As described above, in the contaminated water storage device of the second embodiment, the inner shell 51 and the outer shell 52 constitute a storage tank 50 as a floating body having a double hull structure, the storage tank 50 is moored on the sea, and the inner shell The space 66 between the outer shell 51 and the outer shell 52 is filled with air.

  Accordingly, since the storage tank 50 having a double hull structure is constructed and moored on the sea, it is not necessary to secure an arrangement place on land, and a sufficient amount of contaminated water can be stored.

[Third Embodiment]
FIG. 8 is a schematic diagram showing the contaminated water storage device of the third embodiment, and FIG. 9 is a schematic diagram showing the operation of the contaminated water storage device.

  In 3rd Embodiment, as shown in FIG. 8, the storage device 70 of contaminated water can store the contaminated water containing a radioactive substance using the storage tank moored in a harbor part.

  The storage tank 71 is configured by forming a double hull floating body with the inner shell 51 and the outer shell 52. The inner shell 51 has a hollow shape and can store contaminated water containing a radioactive substance therein. The inner shell 51 has a plurality of tanks 62 formed by partition walls (not shown). Each tank 62 has a supply port 63 capable of supplying contaminated water at the top, and can be opened and closed by a lid 64 and sealed. It is a container.

  The outer shell 52 is disposed outside the inner shell 51 with a space (gap) 66 having a predetermined distance. The outer shell 52 is disposed at least below and around the inner shell 51, and the space portion 66 is filled with air so that buoyancy acts and allows the storage tank 71 to float. The storage tank 71 is provided with a detection device (not shown) for detecting leakage of contaminated water from the inner shell 51 to the outer shell 52.

  The storage tank 71 is provided with a seawater supply / exhaust port 72 capable of supplying and discharging seawater to and from the space 66 at the lower portion, and an opening / closing valve 73 is provided at the seawater supply / exhaust port 72. In addition, the storage tank 71 is provided with an air supply / exhaust port 74 capable of supplying / exhausting air to / from the space 66 at the top, and an open / close valve 75 is provided at the air supply / exhaust port 74.

  Therefore, by closing each on-off valve 73 and 75, the space part 66 will be in a sealed state, and buoyancy will act on the storage tank 71 by the air with which it filled inside. On the other hand, by opening the on-off valves 73 and 75, seawater enters the space 66 from the seawater supply / exhaust port 72, air is discharged from the air supply / exhaust port 74, and the storage tank 71 has no buoyancy. Therefore, as shown in FIG. 9, the storage tank 71 sinks into the sea and is placed on the seabed 81. Then, the hose 83 of the air supply device 82 is connected to the air supply / exhaust port 74 from the breakwater 43. In this state, when the air supply device 82 is operated and air is supplied from the hose 83 to the space portion 66 through the air supply / discharge port 74, the seawater in the space portion 66 is discharged from the seawater supply / discharge port 72 to the outside. Buoyancy occurs. Therefore, as shown in FIG. 8, the storage tank 71 floats in the sea and floats on the sea.

  That is, the storage tank 71 can be floated on the sea by buoyancy by normally closing the on-off valves 73 and 75 and sealing the space 66 with air. On the other hand, when the tsunami occurs, by opening the on-off valves 73 and 75, filling the space 66 with seawater and discharging the air, the buoyancy can be eliminated and it can be installed on the seabed 81, ensuring safety. can do.

  As described above, in the contaminated water storage device of the third embodiment, the seawater supply / exhaust port 72 and the on-off valve 73 capable of supplying and discharging seawater to the space 66 and the air to the space 66 are supplied. An air supply / exhaust port 74 and an open / close valve 75 that can be discharged are provided.

  Therefore, for example, when a tsunami occurs, seawater is supplied from the seawater supply / exhaust port 72 to the space 66 and the internal air is discharged from the air supply / exhaust port 74, so that the storage tank 71 can be settled. Damage can be suppressed.

  In the above-described embodiment, the configuration of the hull 14 and the configuration of the storage tanks 50 and 71 are not limited to each embodiment, and the shape, the number, and the like may be set as appropriate.

  In the above-described embodiment, the hull 14 and the storage tanks 50 and 71 are configured to be arranged in the harbor portion or the dock. However, the present invention is not limited to this place.

10, 40, 70 Storage device for contaminated water 11, 51 Inner shell 12, 52 Outer shell 13, 53 Detector 14 Hull 21, 61 Bulkhead 22, 62 Tank 25, 66 Space (gap)
31 Dock 32 Waterline 33 Filling Member 34,54 Management Device 35,55 Alarm 72 Seawater Supply / Exhaust Port 74 Air Supply / Exhaust Port

Claims (7)

A hollow inner shell that can store contaminated water containing radioactive material inside,
An outer shell disposed outside the inner shell;
A detection device for detecting leakage of contaminated water from the inner shell to the outer shell;
A contaminated water storage device characterized by comprising:   2. The contaminated water according to claim 1, wherein the detection device is provided in a gap between the inner shell and the outer shell, and detects leakage of the contaminated water from the inner shell to the gap. Storage device.   The polluted water storage device according to claim 1 or 2, wherein a hull having a double hull structure is constituted by the inner shell and the outer shell.   The said hull is arrange | positioned at a dock, The circumference | surroundings are supported by the filling member to a water line, The storage apparatus of the contaminated water of Claim 3 characterized by the above-mentioned.   The inner shell and the outer shell form a double hull floating body, the floating body is moored on the sea, and can float by filling the gap between the inner shell and the outer shell with air. The storage device for contaminated water according to claim 1 or 2.   The seawater supply / exhaust port through which seawater can be supplied to and discharged from the gap and an air supply / exhaust port through which air can be supplied / discharged are provided. Storage device. Navigating the ship with a gap between the outer shell and the inner shell to the dock;
Supporting the hull in the dock;
Filling the inner shell of the hull supported in the dock with contaminated water;
A method for storing contaminated water, comprising:

Images