JP2019155288A - Water purification device and mount - Google Patents

Abstract

To provide a water purification device for purifying treated water stored in a pool, which is easy to enlarge, and has a configuration that allows a purifier to be replaced remotely.SOLUTION: A water purification device 1 includes: an exchangeable purification tower 2 provided with a treated water introduction section 203b, a treated water purification section 21, and a treated water discharge section 203a; a supply section 6 for supplying the treated water to the purification tower 2, with its first end portion 61 connected to the introduction section 203b from below the introduction section 203b; and an inlet sealing material 8 provided between the introduction section 203b and the first end portion 61 of the supply section 6. The inlet sealing material 8 is compressed in a vertical direction by the purification tower 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a water purification apparatus and a gantry for mounting a purification tower of the water purification apparatus, and more particularly to a water purification apparatus for purifying stored water in a fuel pool of a reactor building.

  The reactor building has a spent fuel pool (hereinafter referred to as fuel pool) for storing spent fuel and new fuel. Since the fuel pool is open to the operating floor (fuel operation floor), foreign matter and dust (hereinafter referred to as foreign matter) may fall into the fuel pool. When these foreign substances are activated by radiation emitted from the spent fuel, the operating floor dose increases, so an underwater vacuum cleaner for removing foreign substances in the fuel pool may be used. . Patent Documents 1 and 2 disclose a submersible cleaner provided with a suction port, a submersible pump, and a filter. These submersible cleaners are suspended in the fuel pool by a fuel exchanger, and the suction port is moved by the movement of the fuel exchanger.

JP 59-120899 A JP-A-10-123285

  For some reason, it may be necessary to purify the water stored in the fuel pool by a method other than the purification system originally provided in the fuel pool. Even in such a case, it is not impossible to use the submersible cleaner described in Patent Documents 1 and 2. However, since these submersible cleaners are operated by a fuel changer, they are not suitable for applications that continuously and semi-permanently remove foreign matter from pool water. Moreover, since it is premised on using with a fuel changer, it is difficult to increase the size of the apparatus in order to remove more foreign matters. Therefore, in such a case, it is desirable to provide a purification tower within the fuel pool or outside the fuel pool that is less restricted in size and can be operated for a long time. However, since the purification section (filter, etc.) of the purification tower needs to be replaced periodically, and the purification tower is activated when foreign substances are removed, it is desirable to perform this operation as remotely as possible. The above issues more generally apply to the purification of water containing radioactive material stored in containers or pools, and whether or not the purification tower contains radioactive material. This is also the case when it is desirable to replace it remotely.

  The present invention provides a water purification device for purifying water to be treated stored in a container or a pool, which is easy to increase in size and can be replaced remotely by a purification unit. The purpose is to do.

  A water purification apparatus for purifying treated water stored in a container or a pool according to the present invention is purified by an introduction section for treated water, a purification section for purifying treated water introduced from the introduction section, and a purification section. And a discharge section for discharging the treated water, a replaceable purification tower having a first end connected to the introduction section from below the introduction section, and a supply section for supplying the treated water to the purification tower And an inlet seal member provided between the introduction portion and the first end portion of the supply portion. The inlet sealing material is compressed in the vertical direction by the purification tower.

  According to this invention, as long as to-be-processed water is supplied from a supply part, there is no restriction | limiting of the installation place or structure of a purification tower. Therefore, a purification tower having an appropriate size can be used according to the application. The connection between the purification tower and the supply unit is not a general flange connection, but the inlet seal material is compressed in the vertical direction by the purification tower. That is, the purification tower and the supply section can be connected by a simple operation by moving the purification tower relative to the supply section in the vertical direction. Such an operation can be easily performed by remote operation. Therefore, according to the present invention, a water purification apparatus for purifying water to be treated stored in a container or a pool, which can be easily increased in size and can be replaced remotely by a purification unit. A purification device can be provided.

It is a typical sectional view showing an example of a nuclear reactor building. It is sectional drawing of a water purification apparatus. It is the top view of the water purification apparatus seen from the AA line of FIG. 2, and sectional drawing of the water purification apparatus cut | disconnected by the BB line of FIG. It is sectional drawing of a purification tower. It is sectional drawing of the purification tower cut | disconnected by CC line of FIG. 4, and sectional drawing of a filter cartridge. It is a conceptual diagram which shows the action | operation of a 1st valve | bulb. It is sectional drawing of a mount frame. It is sectional drawing of a weight member. It is a conceptual diagram explaining the installation method to the fuel pool of a water purification apparatus. It is a side view of the connection part of a purification tower and a mount. It is a conceptual diagram which shows the seal | sticker by an entrance seal material and an exit seal material. It is a conceptual diagram which shows the sealing method of the introduction part and discharge part of a purification tower.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention can be widely applied when purifying water containing a radioactive substance stored in a container or a pool. In the following embodiment, an example of purifying stored water in a fuel pool of a nuclear power plant (hereinafter, stored water in a fuel pool as treated water is referred to as pool water) will be described.

  First, a fuel pool to which the present invention is applied will be described. FIG. 1 is a schematic sectional view showing an example of a nuclear reactor building provided with a fuel pool. Although FIG. 1 shows a reactor building of a boiling water nuclear power plant, the present invention is also applied to a fuel pool of a pressurized water nuclear power plant and a fuel pool of a site bunker that may be provided in the site of the power plant. can do. The reactor building 101 includes a reactor pressure vessel 102 that contains a fuel 103. The fuel 103 is moved from the reactor pressure vessel 102 to the fuel pool 104 for periodic replacement. The fuel pool 104 is a pool that opens to the operating floor 105, and fuel is exchanged by a fuel exchanger (not shown) that travels on the operating floor 105. The fuel pool 104 is filled with water to shield the radiation emitted from the spent fuel 106, thereby reducing the dose of the operating floor 105. An overhead crane 107 is installed above the operating floor 105. Parts that need to be removed when the fuel is changed are lifted by the overhead crane 107 and temporarily placed on the operating floor 105.

  The water purification apparatus 1 is installed in the fuel pool 104. The entire water purification apparatus 1 of this embodiment is submerged in the fuel pool 104. 2 is a cross-sectional view of the water purification device 1, FIG. 3A is a top view of the water purification device 1 viewed from the line AA in FIG. 2, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. 1 shows a cross-sectional view of the water purification apparatus 1. The water purification apparatus 1 includes a purification tower 2 that purifies pool water, a gantry 3 that supports the purification tower 2, and a weight member 4 that prevents the purification tower 2 from being lifted.

  4 is a sectional view of the purification tower 2, FIG. 5 (a) is a sectional view of the purification tower 2 taken along the line CC in FIG. 4, and FIG. 5 (b) is an enlarged view of portion A in FIG. 5 (a). FIG. 3 shows a cross-sectional view of the filter cartridge 21. The purification tower 2 has a cylindrical body plate 201, an upper lid 202, and a bottom plate 203, and a container for the purification tower 2 is formed by these members. An upper support plate 204 parallel to the upper lid 202 is provided below the upper lid 202. An upper space 205 is formed between the upper lid 202 and the upper support plate 204. A filter receiving plate 206 parallel to the bottom plate 203 is provided above the bottom plate 203. A lower space 207 is formed between the bottom plate 203 and the filter receiving plate 206. A filter installation space 208 in which the filter cartridge 21 is installed is formed between the filter receiving plate 206 and the upper support plate 204.

  In the purification tower 2, more specifically, in the filter installation space 208, the purification section 21 that purifies pool water introduced from the introduction section 203 b of the purification tower 2 is accommodated. The purification unit 21 is a plurality of filter cartridges 21 extending in the vertical direction. In the present embodiment, 18 filter cartridges 21 are provided in one purification tower 2, but the number is not limited to this. As shown in FIG. 5B, the filter cartridge 21 includes a mesh-shaped outer cylinder 211, a mesh-shaped core 212 concentric with the outer cylinder 211, and the outer cylinder 211 and the core between the outer cylinder 211 and the core 212. 212 and a pleated filter 213 provided concentrically. The pleated filter 213 is a filtration membrane folded in a pleat shape. Pool water is introduced from the outer cylinder 211 into the filter cartridge 21, filtered by the pleat filter 213, and filtered water (hereinafter referred to as purified water) is introduced into the core 212. The lower end of the filter cartridge 21 is supported by the filter receiving plate 206, and the upper end is supported by the upper support plate 204. The upper support plate 204 has a plurality of first openings 204a that support the upper ends of the pleat filters 213, and a plurality of second openings that are located at portions where neither the pleat filters 213 nor the communication pipes 22 described later are installed. And an opening 204b. The second opening 204 b allows the upper space 205 to communicate with the filter installation space 208. The diameter of the upper support plate 204 is smaller than the inner diameter of the body plate 201, and a gap is provided between the outer periphery of the upper support plate 204 and the body plate 201. The filter receiving plate 206 is provided with a third opening 206a that is an outlet of the purified water, and the lower end of the core 212 of the filter cartridge 21 communicates with the lower space 207 through the third opening 206a. The bottom plate 203 is provided with a fourth opening 203a that is a discharge portion 203a of the purified water. Therefore, the third opening 206a communicates with the fourth opening 203a through the lower space 207. The fourth opening 203 a communicates with the outside of the purification tower 2.

  Inside the purification tower 2, a communication pipe 22 that extends vertically in parallel with the filter cartridge 21 is provided. The communication pipe 22 communicates the outside of the purification tower 2 with the upper space 205. The communication pipe 22 is supported by a bottom plate 203, a filter receiving plate 206, and an upper support plate 204. In order to prevent the communication pipe 22 from being lifted, it is desirable that the communication pipe 22 is welded to at least one of the bottom plate 203 and the filter receiving plate 206. The bottom plate 203 is provided with a fifth opening 203b which is a pool water introduction portion 203b, and the lower end of the communication pipe 22 communicates with the outside of the purification tower 2 via the fifth opening 203b. The communication pipe 22 passes through the filter receiving plate 206 and the upper support plate 204, and the upper end opens to the upper space 205.

  In order to manufacture the purification tower 2, first, the bottom plate 203 and the filter receiving plate 206 are welded to the body plate 201, then the communication pipe 22 is inserted into the body plate 201, and either the bottom plate 203 or the filter receiving plate 206 is connected. Weld. Next, the plurality of filter cartridges 21 are inserted into the body plate 201. Next, the upper support plate 204 is installed and the filter cartridge 21 is fixed. Thereafter, the upper lid 202 is fixed to the body plate 201 with mounting bolts and nuts. A plurality of bolts 23 are provided between the filter receiving plate 206 and the upper lid 202 to define the distance between the filter receiving plate 206 and the upper lid 202. The bolt 23 is engaged with a nut 29 welded to the upper support plate 204, and the upper support plate 204 can be fixed to the upper lid 202 by rotating the bolt 23 and pressing it against the bottom surface of the upper lid 202. it can.

  A first valve 24 is provided on the upper lid 202, that is, on the top surface of the purification tower 2. As shown in FIG. 6, the first valve 24 includes a spherical space 242 provided in the middle of a pipe 241 extending in the vertical direction and a spherical valve body 243 accommodated in the spherical space 242. The valve body 243 is smaller than the spherical space 242, but its diameter is larger than the upper and lower openings 244 and 245 of the spherical space 242. Therefore, the valve body 243 can freely move in the spherical space 242 while being restrained in the spherical space 242. As will be described later, the purification tower 2 is installed in the fuel pool 104 by being suspended from the fuel pool 104 filled with water. Therefore, in order to suspend the purification tower 2, it is necessary to evacuate the air inside the purification tower 2 while suspending and replace the interior with pool water. When the purification tower 2 is in the air, the valve body 243 is seated on the peripheral wall of the lower opening 245 by its own weight and closes the lower opening 245 of the spherical space 242 as shown in FIG. . However, when the purification tower 2 is suspended from the fuel pool 104, the air inside the purification tower 2 is pressurized with pool water, and the valve body 243 is lifted. Thereby, the air inside the purification tower 2 can be extracted. On the other hand, it is necessary to prevent the pool water introduced into the purification tower 2 from flowing out into the fuel pool 104 during the operation of the water purification apparatus 1. Since the inside of the purification tower 2 is pressurized by the pressure of the submersible pump 5, the valve body 243 is seated on the peripheral wall of the upper opening 244 of the spherical space 242 as shown in FIG. The upper opening 244 is closed. For this reason, the upper space 205 of the purification tower 2 is prevented from communicating with the fuel pool 104.

  FIG. 7 shows a side view of the gantry 3. The gantry 3 supports the purification tower 2, the inlet pipe 6, the outlet pipe 7, and the submersible pump 5. Therefore, the water purification apparatus 1 is integrated and can be installed in the fuel pool 104 with a single operation. The gantry 3 is installed on the floor surface of the fuel pool 104 by its own weight, but may be fixed by a fixing means such as an anchor bolt. The gantry 3 has a frame structure using L-shaped steel, and more specifically, a bottom frame 31 placed on the floor of the fuel pool 104, an upper frame 33, a bottom frame 31 and an upper frame 33. An intermediate plate 32 positioned in the middle of the frame, and a vertical beam 34 extending in the vertical direction and connecting the bottom frame 31, the intermediate plate 32, and the upper frame 33. The intermediate plate 32 constitutes a support surface of the purification tower 2. In the present embodiment, since two purification towers 2 are installed on the gantry 3, six vertical beams 34 are provided.

  Referring to FIGS. 2, 3 (b) and 7, the submersible pump 5 is connected to the purification tower 2 by an inlet pipe 6. The inlet pipe 6 has a first end 61 and a second end 62, and the first end 61 extends from below the introduction portion 203b (fifth opening 203b) to the introduction portion 203b (fifth opening 203b). ) And the second end 62 is connected to the submersible pump 5. Thereby, the pool water discharged from the submersible pump 5 can be supplied to the purification tower 2. The purification tower 2 is connected to an outlet pipe 7 for returning the purified water purified by the purification tower 2 to the fuel pool 104. The outlet pipe 7 has a first end 71 and a second end 72, and the first end 71 extends from below the discharge portion 203a (fourth opening 203a) to the discharge portion 203a (fourth opening 203a). ) And the second end 72 is open to the fuel pool 104. The inlet pipe 6 and the outlet pipe 7 extend in a generally horizontal direction adjacent to each other in the space between the bottom frame 31 and the intermediate plate 32. The inlet pipe 6 and the outlet pipe 7 are provided in common for the two purification towers 2. That is, the inlet pipe 6 and the outlet pipe 7 respectively have rising portions 63 and 73 immediately below the purification tower 2, and the rising sections 63 and 73 are connected to the introduction section 203b and the discharge section 203a of the purification tower 2, respectively. .

  Pool water is discharged from the submersible pump 5 and supplied to the fifth opening 203b (introduction section 203b) of the bottom plate 203 through the inlet pipe 6. The pool water is introduced into the purification tower 2 through the fifth opening 203 b and reaches the upper space 205 through the communication pipe 22. The pool water is introduced into the filter installation space 208 through the gap between the outer periphery of the upper support plate 204 and the body plate 201 and the plurality of second openings 204b. The pool water flows as a downward flow through the filter installation space 208, is introduced into each filter cartridge 21, and is filtered to become purified water. Purified water flows down the core 212 and flows outside the purification tower 2 through the third opening 206a of the filter receiving plate 206, the lower space 207, and the fourth opening 203a (discharge portion 203a) of the bottom plate 203. That is, it is discharged to the outlet pipe 7 and finally returned to the fuel pool 104.

  The inlet pipe 6 is an example of a supply unit that supplies pool water to the purification tower 2. For example, the outlet of the submersible pump 5 (or other treated water pumping device) can be directly connected to the introduction part 203b (fifth opening 203b). In this case, the supply unit serves as an outlet of the submersible pump 5 (or other water pumping apparatus to be treated), and the inlet pipe 6 can be omitted. When using (practicing) a pump of another apparatus or a to-be-treated water pumping apparatus, the supply unit is a pipe that connects the pump or the to-be-treated water pumping apparatus to the purification tower 2. The fourth opening 203a (discharge part 203a) can be directly opened in the fuel pool 104. Accordingly, the outlet pipe 7 can also be omitted.

  The water purification apparatus 1 further has a weight member 4. FIG. 8 shows a side view of the weight member 4. The weight member 4 is supported by the purification tower 2 and applies a vertically downward force to the purification tower 2. The weight member 4 includes a circumferentially continuous side wall 41 that covers the side surface of the purification tower 2, and a top plate 42 that is connected to the top of the side wall 41 and supported on the top surface of the purification tower 2. The side wall 41 includes a weight cylinder 43 that bears most of the weight and a cylindrical support wall 44 that supports the weight cylinder 43, and the weight cylinder 43 is attached to the support wall 44 by welding. When the purification tower 2 is installed in the fuel pool 104, the side wall 41 is not required to have a radiation shielding function, and therefore only needs to cover a part of the side surface of the purification tower 2. Further, the top plate 42 need only form a support surface for supporting the weight member 4 on the purification tower 2, and does not need to cover the entire top face of the purification tower 2.

  The purification tower 2 receives the reaction force of the water flowing through the communication pipe 22. That is, there is a possibility that the upper lid 202 of the purification tower 2 is pushed upward by the water flow ejected upward from the outlet of the communication pipe 22 and the purification tower 2 is lifted. In particular, when the purification tower 2 is installed in the fuel pool 104, the purification tower 2 is easily lifted by the influence of buoyancy. When the lift occurs, not only the possibility of falling but also the sealing performance of the inlet sealing material 8 and the outlet sealing material 9 described later may be deteriorated. The weight member 4 compresses the inlet seal material 8 and the outlet seal material 9 in the vertical direction via the purification tower 2 and enhances the sealing performance of the inlet seal material 8 and the outlet seal material 9.

  Next, with reference to FIG. 9, the installation method to the fuel pool 104 of the water purification apparatus 1 is demonstrated. FIG. 9 is an exploded view of the gantry 3, the purification tower 2, and the weight member 4. The gantry 3, the purification tower 2, and the weight member 4 are manufactured separately in advance at the factory. An underwater pump 5, an inlet pipe 6 and an outlet pipe 7 are fixed to the gantry 3. First, the gantry 3 is installed on the floor surface 104 a of the fuel pool 104. Hanging brackets 331 are provided in the vicinity of the four corners of the upper frame 33 of the gantry 3. Wires are fixed to these hanging brackets 331, the wires are hooked on the hooks of the overhead crane 107, and the gantry 3 is suspended in the fuel pool 104. The gantry 3 is placed on the floor surface 104a of the fuel pool 104 by its own weight. In place of the overhead crane 107, an auxiliary hoist of a fuel changer, a jib crane or the like can be used, regardless of whether these are permanent or temporary. The underwater camera is suspended in advance near the installation position of the gantry 3 so that the gantry 3 is installed at a predetermined position, and the installation position of the gantry 3 is finely adjusted while checking with the operating floor 105 or a monitor installed on another place. It is preferable to do.

  Next, the purification tower 2 is suspended on the gantry 3. A hanging metal fitting 26 is provided at the center of the top surface of the purification tower 2. A wire is fixed to the hanging metal fitting 26, the wire is hooked on the hook of the overhead crane 107, and the purification tower 2 is suspended in the fuel pool 104. Positioning of the purification tower 2 in the horizontal direction is performed by the first guide member 35. That is, as illustrated in FIG. 3B, a plurality of first guide members 35 surrounding the purification tower 2 are provided on the upper surface of the intermediate plate 32 of the gantry 3. In the present embodiment, the four first guide members 35 are provided at intervals of 90 degrees, but the number and position are not limited to this. As shown in FIG. 7, the inner edge 35a of the first guide member 35 is an inclined surface that protrudes inward as it goes downward. For this reason, when the purification tower 2 is suspended on the gantry 3, if the purification tower 2 is displaced in the horizontal direction from the correct installation position, the bottom of the purification tower 2 comes into contact with the inner edge 35a, and the horizontal direction while sliding the inner edge 35a. Move to. Thereby, the purification tower 2 can be positioned in the horizontal direction with respect to the gantry 3. FIG. 10 is a side view of the connecting portion between the purification tower 2 and the gantry 3 as viewed from the direction A in FIG. The gantry 3 is provided with a second guide member 36, and the purification tower 2 is formed with a slit 25 that engages with the second guide member 36. The opening width W in the circumferential direction of the slit 25 increases as it goes downward. That is, the two walls of the slit 25 facing each other in the circumferential direction are inclined surfaces 25a in the lower half. Therefore, when the purification tower 2 is suspended on the gantry 3, if the purification tower 2 is displaced from the correct installation position in the circumferential direction, the second guide member 36 comes into contact with one of the inclined surfaces 25 a of the slit 25, and the purification tower 2 2 moves in the circumferential direction along the slope 25 a of the slit 25. Thereby, the circumferential position of the purification tower 2 can be matched.

  When the purification tower 2 is thus installed at a predetermined position and in a predetermined direction, the purification tower 2 is supported on the intermediate plate 32 of the gantry 3 by its own weight. At the same time, the inlet 203 b of the purification tower 2 is connected to the first end 61 of the inlet pipe 6, and the outlet 203 a is connected to the first end 71 of the outlet pipe 7. FIG. 11A shows a partially enlarged view of the vicinity of the introduction part 203b and the discharge part 203a of the purification tower 2. FIG. The vicinity of the introduction part 203b and the vicinity of the discharge part 203a have the same configuration. Two concave portions 203c are provided on the lower surface of the bottom plate 203 of the purification tower 2, and the inlet seal material 8 and the outlet seal material 9 are fitted into the two concave portions 203c. In FIG. 11A, the illustration of the inlet sealing material 8 (outlet sealing material 9) in the concave portion 203c on the right side is omitted for easy understanding. The inlet sealing material 8 and the outlet sealing material 9 are formed of a material having an elastic repulsive force such as rubber. When the purification tower 2 is installed on the intermediate plate 32, the inlet seal material 8 comes into contact with the first end 61 of the inlet pipe 6, and the outlet seal material 9 contacts the first end 71 of the outlet pipe 7. Touch. That is, the inlet seal material 8 is provided between the introduction portion 203 b and the first end portion 61 of the inlet pipe 6, and the outlet seal material 9 is provided between the discharge portion 203 a and the first end portion 71 of the outlet pipe 7. Will be provided. At this time, as shown in FIG. 11 (b), the first end 61 of the inlet pipe 6, the first end 71 of the outlet pipe 7, the purification tower 2, and the gantry 3 are connected to the purification tower 2. When installed on the intermediate plate 32, the first end 61 of the inlet pipe 6 and the first end 71 of the outlet pipe 7 press the inlet seal material 8 and the outlet seal material 9, respectively, and are elastically deformed (compressed). The positional relationship is adjusted so as to be deformed. The compression amount x of the inlet sealing material 8 and the outlet sealing material 9 is not limited as long as necessary sealing performance can be obtained and the soundness of the inlet sealing material 8 and the outlet sealing material 9 can be maintained, but is preferably about 1 to 2 millimeters. .

  The seal between the introduction part 203b and the first end 61 of the inlet pipe 6 prevents the pool water from leaking to the fuel pool 104 when the pool water discharged from the submersible pump 5 is supplied to the purification tower 2. The seal between the discharge portion 203a and the first end portion 71 of the outlet pipe 7 prevents leakage of purified water to an unintended position in the fuel pool 104. In the present embodiment, these sealing functions are achieved by the inlet sealing material 8 and the outlet sealing material 9 being compressed in the vertical direction by the purification tower 2. That is, the inlet seal material 8 and the outlet seal material 9 are compressed by the purification tower 2 when the purification tower 2 is supported on the gantry 3, and the inlet seal material 8 and the outlet seal material 9. The vertical compression can be realized by a simple operation of simply placing the purification tower 2 on the gantry 3. That is, in this embodiment, the bolt and nut fastening operations required when the flange connection is used are unnecessary. For this reason, it becomes easy to install the water purification apparatus 1 in the fuel pool 104 by remote control.

  Next, the purification tower 2 is covered with the weight member 4. A wire is fixed to the hanging metal fitting 45 formed on the top surface of the weight member 4, the wire is hooked on the hook of the overhead crane 107, and the weight member 4 is suspended in the fuel pool 104 so as to cover the purification tower 2. A plurality of third guide members 37 having the same configuration as the first guide member 35 are formed on the top surface of the gantry 3. The plurality of third guide members 37 are disposed so as to surround the purification tower 2, and when the weight member 4 is suspended so as to cover the purification tower 2, the weight member 4 is placed in the horizontal direction with respect to the purification tower 2. Position. In the present embodiment, the four third guide members 37 are provided at intervals of 90 degrees, but the number and position are not limited to this. As shown in FIG. 7, the inner edge 37a of the third guide member 37 is an inclined surface that protrudes inward as it goes downward. For this reason, when the weight member 4 is suspended so as to cover the purification tower 2, if the weight member 4 is displaced in the horizontal direction from the correct installation position, the bottom portion of the weight member 4 comes into contact with the inner edge 37a and slides on the inner edge 37a. To move horizontally. Accordingly, the weight member 4 can be positioned in the horizontal direction with respect to the gantry 3.

  Exchange of the purification tower 2 can be performed by executing the above procedure in reverse. That is, first, the weight member 4 is lifted by the overhead crane 107. The weight member 4 may be temporarily placed on the operating floor 105 or may be temporarily placed on the floor surface of the fuel pool 104. Next, the purification tower 2 is lifted by the overhead crane 107. Since the activated foreign matter or the like is captured by the filter cartridge 21, the dose of the purification tower 2 is high. For this reason, it is desirable to install the purification tower 2 on the floor surface 104 a of the fuel pool 104. Next, a new purification tower 2 is installed on the gantry 3 according to the above procedure, and a weight member 4 is installed around the purification tower 2 according to the above procedure. These operations can be performed by a simple procedure of simply lifting and hanging the purification tower 2 and the weight member 4. Accordingly, the purification tower 2 can be easily replaced.

  As mentioned above, although this invention was demonstrated by embodiment, this invention is not limited to the above-mentioned embodiment. For example, the submersible pump 5 can be installed in the fuel pool 104, and the gantry 3 and the purification tower 2 can be installed on the operating floor 105. In this case, the inlet pipe 6 needs to connect the submersible pump 5 installed in the fuel pool 104 and the purification tower 2 installed on the operating floor 105. Therefore, it is desirable to attach a part of the inlet pipe 6 to the submersible pump 5 and attach the remaining part of the inlet pipe 6 to the gantry 3 and connect them with the operating floor 105. Unlike the case where it is installed in the fuel pool 104, the purification tower 2 is not affected by buoyancy, so that it is easy to ensure the sealing performance of the inlet seal material 8 and the outlet seal material 9. Therefore, the weight member 4 can be omitted from this viewpoint. However, since the water shielding of the purification tower 2 cannot be expected, in such an embodiment, the weight member 4 is desirably used as a shielding member. In this case, it is desirable that the weight member 4 covers the entire surface of the purification tower 2 and that the thickness of the support wall 44 be set to a thickness necessary for shielding. When the gantry 3 and the purification tower 2 are installed in the air, the gantry 3 and the purification tower 2 can be installed in a position other than the operating floor 105 in the reactor building 101, in another building, or outdoors. When the purification tower 2 is installed in the air, the first valve 24 may be a normal on / off valve. When the submersible pump 5 is started, the first valve 24 is opened, the air in the purification tower 2 is exhausted, and when the water is full, the first valve 24 is closed. When the submersible pump 5 is stopped, the first valve 24 is opened at the time of filter replacement, air is introduced into the purification tower 2, and water in the purification tower 2 is discharged. If remote control is required, the first valve 24 can be an automatic valve.

  When the purification tower is installed in the air, the second valve 27 and the third valve 28 may be provided in the introduction section 203b and the discharge section 203a of the purification tower 2 as shown in FIG. The second valve 27 is opened when the introduction portion 203b (fifth opening 203b) of the purification tower 2 is connected to the first end 61 of the inlet pipe 6 via the inlet sealing material 8, and the purification tower 2 is opened. When the connection between the introduction portion 203b of the purification tower 2 and the first end portion 61 of the inlet pipe 6 is released by lifting the 2. The third valve 28 is opened when the discharge part 203a (fourth opening 203a) of the purification tower 2 is connected to the first end 71 of the outlet pipe 7 via the outlet sealing material 9, and the purification tower 2 is opened. When the connection between the discharge portion 203a of the purification tower 2 and the first end portion 71 of the outlet pipe 7 is released by lifting the 2.

  Regardless of whether the purification tower 2 is installed underwater or in the air, it is conceivable to store the used purification tower 2 in the air outside the container or the fuel pool 104. When dust and particulates in the air flow into the purification tower 2 through the introduction part 203b and the discharge part 203a, there is a possibility that these dusts and particulates are captured by the pool water remaining in the purification tower 2 and activated. . In that case, since the air dose around the purification tower 2 is considered to increase, the introduction part 203b (fifth opening 203b) and the discharge part 203a (fourth opening 203a) of the purification tower 2 may be closed. desirable. FIG. 12 (a) shows the concept of an apparatus for closing the introduction part 203b and the discharge part 203a of the purification tower 2. FIG. The gantry 111 installed in the air includes a guide member 114 similar to the gantry 3. Therefore, the purification tower 2 can be accurately positioned by the guide member 114 when the purification tower 2 is suspended at a predetermined position inside the gantry 111 by a crane or the like. A cover plate mounting base 112 is installed in the lower center of the base 111, and a cover plate 113 made of magnet is placed on the top surface thereof. The cover plate 113 has a shape that covers the introduction portion 203b and the discharge portion 203a. The lid plate mounting base 112 has an upper plate 112a on which the lid plate 113 is placed, and a side wall 112b that is attached around the upper plate 112a and supports the upper plate 112a. The upper surface of the upper plate 112a is slightly lower than the top of the side wall 112b, and the cover plate 113 is placed in a shallow recess formed by the upper plate 112a and the side wall 112b. The top of the side wall 112b is lower than the upper surface of the cover plate 113 placed on the upper plate 112a, and interference between the purification tower 2 and the cover plate mounting base 112 when the purification tower 2 is suspended is prevented. The bottom plate 203 is made of a ferromagnetic material such as steel. Therefore, when the purification tower 2 is suspended by a crane or the like and the bottom plate 203 is brought into contact with the lid plate 113, the lid plate 113 is attracted to the bottom plate 203 by magnetic force, and the introduction portion 203b (fifth opening 203b) of the purification tower 2 is obtained. And the discharge part 203a (4th opening 203a) is closed. According to the present embodiment, the introduction unit 203b and the discharge unit 203a can be closed by remote operation with a crane even in an environment with high radiation.

  FIG. 12B shows another embodiment. In this embodiment, the internal thread 121 is formed in the inner surface of the introduction part 203b (fifth opening 203b) and the discharge part 203a (fourth opening 203a) of the purification tower 2. The introduction part 203b and the discharge part 203a of the purification tower 2 are closed by screwing into the introduction part 203b and the discharge part 203a while rotating a plug or bolt 122 having an external thread 123 formed on the outer peripheral surface. In order to easily screw the bolt 122, the purification tower 2 may be laid down in advance. By using a jig that can be remotely operated for screwing in the bolt 122, the introduction portion 203b and the discharge portion 203a can be closed by remote operation even in an environment with high radiation, as in the above embodiment.

  In the embodiment shown in FIG. 12, when the purification tower 2 is lifted from the gantry 3, the introduction part 203 b and the discharge part 203 a are separated from the inlet seal material 8 and the outlet seal material 9, and water inside the purification tower 2 can leak. There is sex. In this case, a drain nozzle can be provided at the bottom of the purification tower 2, and a temporary pipe or a temporary tube provided with a valve can be connected to the drain nozzle. The end of the temporary piping or temporary tube is connected to the container. When the purification tower 2 is installed on the operating floor 105, the end of the temporary piping or the temporary tube may be connected to the fuel pool 104, and the pool water inside the purification tower 2 may be returned to the fuel pool. By opening the valve, the water in the purification tower 2 can be almost drained. The valve may be an automatic valve or a manual valve that can be mounted on a remotely operable jig.

  Although the above-described embodiment purifies pool water, the water purification apparatus of the present invention is a non-pool water, treated water including poisonous substances, deleterious substances, etc. It can be applied to the treatment of untreated water. Furthermore, the present invention is also suitable when the water to be treated itself does not have radioactivity or toxicity, but it is necessary to replace the purification tower in a situation where it is not easily accessible by humans, such as in a radioactive environment or a toxic gas environment. Can be applied.

1 Water purification device 2 Purification tower 21 Purification section (filter cartridge)
24 1st valve 25 Slit 27 2nd valve 28 3rd valve 203 Bottom plate 203a Discharge part 203b Introduction part 203c Recess 3 Base 35 1st guide member 36 2nd guide member 37 3rd guide member 4 Weight member 41 Side wall 42 Top plate 5 Submersible pump 6 Inlet piping (supply section)
61 First end of inlet piping 62 Second end of inlet piping 7 Outlet piping 71 First end of outlet piping 72 Second end of outlet piping 8 Inlet sealing material 9 Outlet sealing material 104 Fuel pool

Claims (11)

A water purification device for purifying treated water stored in a container or a pool,
An exchangeable purification tower comprising an introduction part of treated water, a purification part for purifying treated water introduced from the introduction part, and a discharge part for discharging treated water purified by the purification part When,
A first end connected to the introduction part from below the introduction part, and a supply part for supplying treated water to the purification tower;
An inlet seal provided between the introduction part and the first end of the supply part,
The water purification apparatus, wherein the inlet seal material is compressed in the vertical direction by the purification tower.   A pedestal for supporting the purification tower, the purification tower is supported on the gantry by its own weight, and the inlet seal material and the outlet seal material are purified when the purification tower is supported on the gantry. The water purification apparatus according to claim 1, which is compressed by a tower.   The purification tower is supported on the gantry by being suspended on the gantry, and the gantry positions the purification tower in a horizontal direction with respect to the gantry when the purification tower is suspended on the gantry. The water purification apparatus according to claim 2, further comprising a plurality of first guide members surrounding the purification tower.   The gantry includes a second guide member for aligning a circumferential position of the purification tower when the purification tower is suspended on the gantry, and the purification tower is associated with the second guide member. The water purification apparatus of Claim 3 which has a slit to match.   5. The water purification apparatus according to claim 2, further comprising a weight member that is supported by the purification tower and applies a downward force to the purification tower in a vertical direction.   The weight member has a circumferentially continuous side wall covering at least a part of a side surface of the purification tower, and a top plate connected to the top of the side wall and supported by the top face of the purification tower. 5. The water purification apparatus according to 5.   A plurality of third guide members surrounding the purification tower for positioning the weight member in a horizontal direction with respect to the purification tower when the weight member is suspended so as to cover the purification tower; The water purification apparatus according to claim 6, comprising:   The said purification tower has a baseplate in which the said introducing | transducing part and the said discharge part were formed, the recessed part is provided in the lower surface of the said baseplate, and the said inlet seal material is fitted in the said recessed part. The water purification apparatus of Claim 1.   The water purification apparatus according to any one of claims 1 to 8, wherein the water to be treated contains a radioactive substance.   The water purification apparatus according to any one of claims 1 to 9, wherein the purification tower has a first valve that allows air to pass through and shuts off water on a top surface thereof.   It is described in any one of Claims 1-10, and is used in order to store the purification tower provided with the baseplate which consists of a ferromagnetic material in which the said introduction part and the said discharge part were formed outside the said container or the said pool. A gantry having a lid plate made of a magnet that is attracted to the bottom plate from below the bottom plate and closes the introduction portion and the discharge portion.

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