JPS6183999A - Storage device for waste liquor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a waste liquid storage device for storing waste liquid mixed with solid precipitates in a uniformly stirrable manner, and in particular for stirring radioactive waste liquid discharged from nuclear power generation facilities. The present invention relates to a radioactive waste liquid storage device that can store and process radioactive waste liquid.

[Technical background of the invention and its problems]

Nuclear power plants are equipped with radioactive waste processing equipment, which processes and safely manages the radioactive waste generated at the power plant. Radioactive waste includes equipment drain water from various equipment, waste resin powder generated from condensate filters, and condensate 1] 12J! There are waste resins such as ion exchange resins generated from equipment such as ion-exchange resins, and concentrated waste liquids and clad water generated from concentrators and clarifiers.These radioactive waste liquids are radioactive waste liquids stored in nuclear power generation equipment buildings. It is collected in a storage device and temporarily stored.

Radioactive waste liquid contains ion exchange resin, cladding, and other relatively small solid particles, and when these solid particles are stored as radioactive waste liquid, they settle in the storage container and are deposited in a precipitated state at the bottom of the container. be done. The radioactive waste liquid stored in the storage container is transferred to a regeneration device that performs chemical treatments such as filtration and desalination for the purpose of reuse. It is necessary to stir up the precipitate and mix it into the supernatant waste liquid (mother liquor).

For this reason, the radioactive waste liquid storage device includes a stirring device, and the radioactive waste liquid stored in the stirring device is stirred. The stirring device includes a pump installed outside the storage container and a plurality of injection nozzles that inject liquid discharged from the pump. The pump sucks the supernatant mother liquor stored in the storage container and guides it to the injection nozzles, and jets the liquid from above toward the bottom of the storage container from these injection nozzles to agitate the precipitate.

However, the above-mentioned stirring device can only stir the precipitate on the bottom of the container, which is directly impinged by the jet stream ejected from the injection nozzle. However, for stirring, the entire waste liquid in the storage container is made to flow over time, and jet injection is continued until a flow velocity is achieved that lifts the sediment at the bottom of the container, causing the sediment to float and mix. Stirring takes a long time and requires a large amount of stirring energy.

In order to float and stir the precipitate in a short time using this stirring device, it is necessary to arrange a large number of injection nozzles in a dense and regular manner so that the jet stream from each injection nozzle collides with the bottom of the container. However, since the stirring efficiency of conventional stirring devices is not good, there is a large amount of stirring loss, and there are disadvantages in that a large amount of stirring energy is required.

From this point of view, in order to improve the stirring efficiency, a submersible motor type three-dimensional circulation stirring device 'J3. a has been developed. This stirring device a has a submersible motor C disposed in the center of the storage container, and a pump impeller d operated by this motor is housed in a guide casing e, and the pump impeller d lowers the supernatant mother liquor f. A countercurrent is applied, and this downward flow is changed by a guide casing e to create a radial flow along the bottom of the container, and the precipitate is suspended and mixed in the supernatant mother liquor f, and stirred (T).

Note that power is supplied to the underwater motor C via an electric cable q.

After the stirring action of the solid precipitate is completed, the waste liquid is transferred from the outlet to a regenerator (not shown), where it is subjected to chemical treatments such as filtration and desalination.

By the way, in the submersible motor type three-dimensional circulation stirring device described above, the downward flow caused by the operation of the pump impeller d becomes a radial flow along the bottom wall surface of the container by the guide casing, and flows uniformly along the bottom of the container, so that the stirring efficiency is high. Since there is little loss associated with stirring, less energy is required for stirring.

However, since a low-pressure, high-flow pump device is installed in a storage container that stores radioactive waste liquid, there are problems with the power supply system for the pump device, abnormality detection, handling, maintenance, and inspection in the event of corrosion, and even earthquake resistance. This pump device can be used to treat waste liquids with weak radioactivity, but it cannot be used for agitation of waste liquids with strong radioactivity or high reliability, as the radiation resistance of the constituent materials is difficult and extremely disadvantageous. It could not be used for stirring storage containers that require high performance.

[Purpose of the invention]

The present invention has been made in consideration of the above-mentioned circumstances, and it allows radioactive waste liquid with strong radioactivity to sink regardless of the type of waste liquid. 2'151! It is an object of the present invention to provide a waste liquid storage device that can efficiently stir the waste liquid in a storage container and store the waste liquid safely and reliably.

[Summary of the invention]

In order to achieve the above-mentioned object, the waste liquid storage device according to the present invention includes a storage container for storing waste liquid such as radioactive waste liquid, and an injection guide element disposed at the bottom of the storage container and forming an annular spout. , a stirring pump V device installed outside the storage container; a pump discharge pipe for guiding the pressurized liquid from the stirring pump device to the injection guide element; and a pump suction pipe leading to the device, and is configured such that pressurized liquid is sprayed radially from the annular spout of the jet guide element onto the bottom surface of the storage container by the operation of the stirring pump device. It is characterized by:

[Embodiments of the invention]

Hereinafter, preferred embodiments of the waste liquid storage device according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a waste liquid storage device 1 installed in a building of a nuclear power generation facility, and this waste liquid storage device has a storage container 3 housed in a concrete frame 2 of the nuclear power generation facility building. The storage container 3 is constructed by lining the inner wall surface of one chamber of the concrete body 2 with a lining plate by welding or the like, and the outer pipe 4 is connected to the vicinity of the center of the bottom of the storage container 3 in a liquid-tight manner. The top of the outer tube 4 opens into the storage container 3, while the inner tube 5 is inserted into the outer tube 4 to form a double tube structure. The outer pipe 4 extends downward through the concrete frame 2, and its lower end is fluid-tightly joined to the middle of the inner pipe 5 via a partition plate 6.

As shown in FIG. 2, a protective sleeve 7 is embedded in the concrete frame 2, and an outer pipe 4 is inserted into the protective sleeve γ.
is extended and inserted.

On the other hand, the inner tube 5 protrudes upward from the top of the outer tube 4 and terminates, and opens into the storage container 3. A covering injection guide element 8 is mounted. The injection guide element 8 has an inverted dish shape or an umbrella disc shape, and is detachably fixed to the inner tube 5 by a mounting flange divided into two parts and a fixing member 9 such as a mounting bolt. The injection guide element 8 closes the top of the outer tube 4 in the axial direction and opens the entire circumference in the circumferential direction. Therefore, an annular spout 10 is formed between the bottom of the storage container 3 and the outer peripheral edge of the jet guide element 8 .

The inner pipe 5 extends downward from the outer pipe 4 and is horizontally branched into two at the lower end of the lower chamber 11, with one branch pipe 4a connected to the suction port of the stirring pump 12, and the other branch pipe 5
b is connected to the suction port of the transfer pump 13. Each pump 1
2.13 are respectively driven by pump motors 15.16 installed on the base 14 of the lower chamber 11. The transfer pump 13 is a regeneration device whose discharge side is provided in another chamber 19 via a transfer pipe 18! 20, and the waste liquid is subjected to chemical treatments such as filtration and desalination by this regeneration device 2o. A valve 21 is installed in the transfer pipe 18. Further, the stirring pump 13 and the pump motor 15 constitute a stirring pump device 22.

On the other hand, the discharge side of the stirring pump 12 is connected to the lower part of the outer pipe 4 via a connecting pipe 24 having a valve 23 in the middle, and the stirring pump device 22 is connected to the lower part of the outer pipe 4 by this connecting pipe 24 and the outer pipe 4.
A pump discharge pipe is configured to guide the pressurized liquid from the pump to the injection guide element 8. Below the connection port of the outer pipe 4,
A small communication hole 26 is bored in the inner tube 5, and this small hole 26
The annular flow path 27 in the outer tube 4 is communicated with a flow path 28 in the inner tube 5 shown in FIG. A small hole 26 is formed directly above the partition plate 6 of the outer tube 4, and this small hole 26 makes it possible to completely empty the waste liquid in the storage container 3. on the other hand,
The inner pipe 5 constitutes a pump suction pipe that guides the radioactive waste liquid in the storage container 3 to the stirring pump device 22.

Next, the operation of the waste liquid storage device shown in FIGS. 1 and 2 will be explained.

Generated from equipment drain water from various equipment installed in nuclear power generation facilities, waste resin such as powdered resin and ion exchange resin from condensate filters and demineralizers, and from concentrators and clarifiers. Radioactive waste liquids such as concentrated waste liquid and cladding water are guided into the storage container 3 and stored therein.

When radioactive waste liquid is stored, minute solids such as ion exchange resin and cladding precipitate and are deposited on the bottom of the container. Once a predetermined amount of radioactive waste liquid has been stored, the waste liquid is transferred to the regeneration unit m20 for chemical treatment such as filtration and desalination. However, since it is not possible to directly transfer the radioactive waste liquid to the regeneration device 20 with sediment deposited at the bottom of the container, in this case, the transfer pump 13 is kept stopped and the motor-driven The stirring pump device 22 is activated. By starting this stirring pump device 22, the storage container 3
The supernatant waste liquid (mother liquor) stored in the interior is sucked through the inner tube 5, and then the pressurized liquid (supernatant mother liquor) is pressurized with a pump.
is discharged into the outer pipe 4 via the connecting pipe 24. The supernatant mother liquor discharged into the outer tube 4 rises through the mouth channel 27 and is forced to change its flow direction by 90 degrees by the jet guide element 8, and is discharged from the annular spout 10 of the jet guide element 8 into the container. It is ejected radially all the way around the bottom.

The jet of supernatant mother liquor from the annular spout 10 flows along the bottom of the storage container 3, and lifts and stirs the accumulated precipitate, causing it to float and mix. Due to the flow of the jet flow, an entrained flow A is generated which is several times the pump discharge flow rate, and these jet flows and entrained flow A flow in a radial direction and reach the side wall surface of the storage container 3,
A huge upward flow rises from this side wall surface, so
A toroidal flow is generated throughout the container, and the precipitate can be effectively and efficiently stirred and mixed throughout the container.

When stirring of the precipitate is completed in the storage container 3 and the radioactive waste liquid is uniformly stirred and mixed, the transfer pump 13 is activated and the valve 21 is opened. As a result, the radioactive waste liquid in the storage container 3 is sent to the regenerator 20 through the transfer pipe 18, where it is chemically treated. Although the operation of the stirring loop, that is, the stirring pump device 22 may be stopped during the transfer of radioactive waste liquid, it is more efficient to continue the operation.

Moreover, when internally inspecting the inside of the storage container 3, it becomes necessary to completely discharge all the radioactive waste liquid stored in the storage container 3. At this time, the annular flow path 2 of the outer 1lIII pipe 4
If the radioactive waste liquid is retained in the tube 7, complete discharge becomes impossible, but the inner tube 5 has a small communication hole 2 as shown in FIG.
6 is formed, the accumulated waste liquid can flow into the inner pipe 5 through this small hole 26, and the radioactive waste liquid in the storage container 3 can be completely discharged.

Flow through these small holes also occurs during normal stirring operation, and acts to reduce stirring efficiency. However, if a small hole 26 with an appropriate hole diameter is selected from the container of the stirring pump 12, the drop in stirring effect can be practically reduced. can be ignored.

In this way, since the planar jet stream is ejected radially from the annular jet port 10 along the entire bottom surface of the storage container 3, the precipitate is stirred and blown up, effectively floating it.
'fU can be combined, and it is possible to obtain a stirring effect as high as that of the submersible motor-type three-dimensional circulation stirring device shown in FIG.

In addition, compared to a submersible motor-type three-dimensional circulation stirring device, the structure of the device disposed inside the storage container 3 is simpler and simpler, eliminating the need for an underwater power supply system or an abnormality detection system for the submersible motor. Since the stirring pump 12 is provided in the lower chamber 11 and is not provided in the storage container 3, maintenance and inspection work for the stirring pump 12 etc. is facilitated. Since it is fixed to the foundation 14 of the base 14, the seismic resistance and radiation resistance of the constituent materials are improved, which makes it extremely advantageous, and even waste liquid with strong radioactivity can be effectively stirred.

Furthermore, since electric equipment such as motors is not installed underwater, it is possible to effectively prevent electric shock accidents for workers, and furthermore, it is possible to prevent electrical corrosion from occurring in the storage container 3, so radioactive waste liquid can be stored reliably. be able to.

Also, focusing on the pump motor 14, there is no need to install the pump motor underwater as in submersible three-dimensional reflux stirring @, so there is no need for special use, and compared to conventional stirring devices, the pump pressure can be increased. It can be made smaller and smaller.

Furthermore, in the waste liquid storage apparatus shown in FIGS. 1 and 2, even if the water level of the radioactive waste liquid to be stored decreases,
It is possible to stir the radioactive waste liquid, and the effective storage capacity is permissible.
can be made larger.

Next, modifications of the mounting structure for the injection guide element disposed at the bottom of the storage container 3 will be described with reference to FIGS. 3 to 6. Components that are the same as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and explanations thereof will be omitted.

The one shown in FIG.
A two-sided mounting flange 31 is attached to this outer circumferential groove 30, and an umbrella-shaped disk-shaped injection guide element 8 is attached to the mounting bolt via a gap adjustment shim 32 laminated on this mounting 7 flange 31. Fix it with the fixing tool 33. Thus, an annular jet nozzle 10 is formed between the outer peripheral edge of the jet guide element 8 and the bottom of the storage container 3, and from this jet nozzle 10 pressurized air is applied by a stirring pump device 22 (see FIG. 1). Pressure liquid (supernatant mother liquor) is ejected radially.

At that time, the gillep G of the annular spout 10 is
It is determined by the discharge inflow from 2 and the pressure, but the pressure loss of the piping and the inner pipe 5 and the outer full! Since the difference in thermal expansion due to the temperature difference between the tube 4 and the tube 4, as well as manufacturing and installation errors, greatly affect the stirring performance, it is necessary to precisely adjust the gap.

The actual gap adjustment of the annular spout 10 is performed by measuring and adjusting the flow rate and pressure of the stirring pump while operating the stirring pump device 22 after installation in the nuclear power generation facility. This gap adjustment is performed by attaching and detaching the adjusting shim 32. Therefore, the adjustment shim 32 has an annular spout 1
This constitutes the gear lub adjustment mechanism of o.

FIG. 4 shows the mounting structure of the umbrella-shaped disk-shaped injection guide element 8A with improved earthquake resistance.

In this mounting structure, the mounting base of the injection guide element 8A is fitted inside @5, and a labyrinth 35 is formed on the mounting surface of the mounting base so that it can slide fluid-tightly and freely between it and the outer peripheral surface of the inner tube 5. is fitted.

The injection guide element 8A includes a plurality of cylindrical guide spacers 3.
6 and is removably fixed to the bottom wall of the storage container with a mounting bolt 37 to ensure a gap G of the annular spout 10.

Since the mounting structure jΔ of the jet q/j guide element 8A has a rigid structure, even if a horizontal earthquake occurs, the jet guide element 8A will not swing, and the inner tube 5 will also be vibration-proofed. Therefore, the inner tube 5 can be stably supported, and the
can be effectively prevented. On the other hand, since the girth G of the annular spout 10 is properly maintained, even if an earthquake occurs, the jet stream will not be disturbed and the stirring effect will not be impaired.

Also, the diameter of the annular spout 10? The knob G is not constant over the entire circumference, and there is a slight difference in the 4"J' jut.
Due to the hydraulic water balance force caused by this, the injection guide element 8
There is a risk that self-excited vibrations may occur in A, but in this case, by firmly fixing the injection guide element 8A to the bottom of the Otori storage container 3 via the guide spacer 36, the occurrence of self-excited vibrations can be prevented and effectively can be prevented. The gap between the annular spout 10 can be adjusted simply by replacing the guide spacer 36.

However, in this mounting structure of the injection guide element 8A, the guide spacer 36 causes turbulence in the flow of waste liquid; If you do so, it will actually disturb the jet flow,
It is possible to prevent the stirring efficiency from decreasing.

FIGS. 5 and 6 show still another modification of the structure of the ejection guide element 8A having an umbrella-shaped disk shape. The mounting structure ('J 1145'r!i) shown in this modification is obtained by removing the guide spacer 36 from the mounting structure shown in FIG. 4. By removing the guide spacer 36, the injection guide element 8A is , which is not shown in FIG. 1, slides along the inner tube 5 when the stirring pump device 22 is started or stopped. FIG. 5 shows the stirring state in which the stirring pump device 22 is in the activated state, and FIG. .

When the stirring pump device 22 is started and in the stirring state,
The discharge pressure from the stirring pump 12 overcomes the weight and frictional force of the jet guide element 8A, causing the guide element 8A to rise to the position limited by the bolt head of the mounting bolt 37, and the stirring jet from the annular spout 10 is gushing out.

When the stirring pump device 22 stops, the effect of the pump discharge pressure disappears, so the injection guide element 8A falls due to its own weight and comes into close contact with the bottom of the storage container 3. Therefore, the injection guide element 8A can prevent backflow like a check valve.

Due to this check valve effect, even if the discharge side communication pipe 24 of the stirring pump 12 is damaged and leakage occurs, the radioactive waste liquid stored in the storage container 3 can be prevented from leaking.

Furthermore, while the stirring pump 12 and the transfer pump 13 (both shown in Figure 1) were being operated to transfer the radioactive waste liquid to the regeneration device 20, the stirring pump 12 suddenly stopped due to some kind of accident. When this occurs, the injection guide element 8A descends under its own weight and covers and closes the top opening of the outer tube 4, thereby preventing the radioactive waste liquid containing the precipitate from flowing back into the annular flow path 27. Stirring pump 1
It is possible to prevent precipitates from being mixed into the water and stirring the stirring pump 12 in the reverse direction.

FIG. 7 does not show a first modification of the injection guide element 8B.

The injection guide element 8B shown in this modification is formed by cutting the outer periphery of an umbrella-shaped disk-shaped plate perpendicularly to the longitudinal direction of the storage container 3, and from the annular injection port 10 according to the cross-sectional shape of the storage container 3. The speed of the ejected jet stream is changed.

When a part of the outer circumferential portion of the injection guide element 8B is cut, the gap between the annular jet nozzle 10 at the cut portion becomes large, and the amount of water jetted from the jet nozzle at the cut portion becomes large. Therefore, the flow velocity distribution curve A of the jet jet ejected from the annular jet port 10 becomes as shown in FIG. The radioactive waste liquid in the container can be effectively stirred, and an excellent stirring effect can be achieved.

d3, Fig. 7 shows an example in which the outer circumferential portion of the injection guide element 8B is cut so as to face each other in the diametrical direction, but instead of this cutting deformation, the injection guide element can be cut into an elliptical shape, an oblong shape,
It may be deformed into a rectangular shape, a triangular shape, etc., and when each deformation is performed, the flow velocity distribution of the ejected flow is determined according to the shape of the storage container 3.

FIG. 8 shows a second modification of the umbrella-shaped disc-shaped injection guide element.

The jet guide element shown in this modification has a slit or the like in the annular jet port 10 so that the jet jet ejected from the annular jet port 10 is a swirling flow C having a certain angle from the radial direction.
A large swirling flow may be generated within the storage container 3.

In this case, by ejecting the jet from the annular jet nozzle 10 at a constant jet angle with respect to the radial direction, the jet flows in the storage container 3 while rotating (rotating) and making a sharp turn (revolution). ), so that even the precipitate that has fallen into the corners of the rectangular container 3 can be effectively stirred.

That is, as shown in FIG. 9, the jet stream injected from the jet guide element 8C flows along the bottom surface of the container with an accompanying flow several times the flow rate of the jet stream, and reaches the side wall surface. At this time, if the curvature of the corner formed by the container bottom and side wall surface is small, the jet flow will not reach the depths of the corner and will curve as a flow with a large curvature as shown by arrow B. Precipitates 39 are left in an accumulated state on the four sides of the section.

However, if the jet stream ejected from the annular jet port 10 is swirled around greatly to generate a flow parallel to the side wall, the jet stream will sufficiently reach the corners and remove the deposits 39 mentioned above. can do.

According to experiments, in this type of storage container 3, when the practical stirring flow rate is several + c11/SeC, the radius of curvature of the corner part is 20
It was found that no deposits were formed if the temperature was greater than α. However, in reality, it is extremely difficult to give a curvature of 20 cR or more due to the concrete structure, but by giving a large swirling flow to the jet from the injection guide element 8C as shown in FIGS. 8 and 9, The problem of accumulated sediment can be easily solved.

FIG. 10 shows a second embodiment of the waste liquid storage device 1A of the present invention.

The waste liquid storage device 1A shown in this embodiment has a storage container 3
The structure of A is fundamentally different from the storage container 3 shown in FIG. 1, which is constructed by lining a metal lining plate. This storage container 3A is a cylindrical storage tank, and this storage tank 3A is supported on a support tube (support skirt) 42 erected on the floor surface 41 of the storage chamber 40.

The storage tank 3A has a smooth curved floor surface, and in this case, the storage tank 3A and the stirring pump device 22A are housed in the same storage chamber 40. Therefore, the internal volume of the storage tank 3A is smaller than the internal volume of the storage container 3 shown in FIG. 1, which is lined with a metal lining plate, and is relatively small. The rest of the structure is the same as that of the waste liquid storage device shown in FIG. 1, so the same reference numerals are given and the explanation will be omitted.

Even in the waste liquid storage device 1A not shown in FIG. 10, the operation and effect are similar to those shown in FIG. 1.

FIG. 11 shows a third embodiment of the waste liquid storage device 1B of the present invention.

The waste liquid storage device 1B shown in this embodiment is a cylindrical free-standing storage tank, and a stirring 17
The configuration in which the pump device 22 is provided is essentially different from that shown in FIG. In this waste liquid storage device, the stirring pump 12 and pump motor 15 of the lower space stirring pump device 22 in the support tube 42 are provided integrally with the storage tank 3A, and the lower space 43 in the support tube 42 is effectively used. By utilizing this, the waste liquid storage device 1B can be made compact and compact.

In addition, by housing the stirring pump device 22 in the support tube 42, installation space can be saved, and the stirring loop system is made integrally or integrally with the storage tank 3A when manufacturing the storage tank 3A at the factory. This reduces on-site installation work.

Furthermore, although not shown in FIG.
It can be installed in the lower space 43 in the support tube 42 of A, integrally or integrally with the storage tank 3A. In this case, on-site installation work can be further reduced.

FIG. 12 shows a fourth embodiment of the waste liquid storage bag @1C, and the waste liquid storage device 1C shown in this embodiment has one pump 44 serving as both a stirring pump and a transfer pump,
Valve 45.46 I? It is designed so that the stirring action and the transferring action can be performed with 1 lrJl operation.

In this waste liquid storage device 1C, high pressure liquid from the pump 44 is passed through the inner pipe 5A, and the annular flow path of the outer pipe 4A is used as a pump suction flow path.

The waste liquid storage device 1C comprises a storage container 3B that is lined with a metal lining plate in a chamber 46 surrounded by a concrete frame 2 of a nuclear power generation facility.
An outer pipe 4A extending downward through the concrete frame 2 is welded to the bottom of the concrete frame 2 in a liquid-tight manner.

While the top of the outer tube 4A is opened into the storage container 3B,
The inner tube 5A protrudes from the top of the outer tube 4A into the storage container 3B, and has an umbrella-shaped disk-shaped injection guide element 8dI at its tip.
fi will be installed. The inner tube 5A is closed in the axial direction and opened in the circumferential direction by this injection guide element 8d. It is desirable that a narrow gap be formed in the circumferential direction between the circumferential Un opening and the opposing lower guide disk.

Therefore, if the storage volume of the radioactive waste liquid stored in the storage container 3B is small and the container is small, -゛pump 44
It would be more advantageous to reduce the number of installed units and use them for both purposes. Furthermore, by flowing the high pressure liquid from the pump 44 into the inner pipe 5A, even if a leakage phenomenon occurs, it will not flow out of the storage container 3B. However, the pump 44 is not necessarily included in the inner pipe 5A.
There is no need to guide the high-pressure liquid through the inner pipe 5A, and a low-pressure flow may be passed through the inner pipe 5A, and a detour may be passed into the outer pipe 4A.

13 and 14 show a fifth embodiment in which the present invention is applied to a large storage container 3C having a rectangular horizontal cross section.

A plurality of injection guide elements 8e, 8e are arranged at intervals in the longitudinal direction within the storage container 3C.

FIGS. 13 and 14 show the injection guide element 8e.

An example is shown in which two 8e are arranged, and thereby the storage container 3
This allows the radioactive waste liquid in C to be efficiently stirred.

In this case, only one pump suction pipe 46 to the stirring pump 12 and the transfer pump 13 is required, so there is no need for a double pipe VJ construction.

Further, FIGS. 15 and 16 show a sixth embodiment of the present invention.

The waste liquid storage device 1D shown in this embodiment is a stirring pump 1
The connecting pipe 24A from 2 is extended to the upper part of the storage container 3, and is made to hang down from the upper center of the storage container 3 through the lid plate 47. The connecting pipe 24A has an n-end near the bottom plate of the storage container 3, and an umbrella-shaped disk-shaped injection guide element 8f is attached to the lower end of the connecting pipe 24A.
is installed.

As shown in FIG. 16, the injection guide element 8f is fixed to the flow dividing plate 48 fixed to the bottom plate of the storage container 3 via a guide spacer 49 with a mounting bolt 50. The flow dividing plate 48 has a flow dividing projection 51 corresponding to the lower end opening of the connecting pipe 24, and this flow dividing projection 51 allows the stirring pump 1
2 is smoothly divided radially and ejected from the annular ejection port 10 in the entire circumferential direction and radially.

In the telescopic storage device shown in FIGS. 15 and 16, the installation position of the injection guide element 8f can be adjusted arbitrarily even after installation, taking into consideration the properties of the radioactive waste liquid stored in the storage container 3 and the equipment installed in the container. It also has the advantage of being freely changeable. In addition, there is no need for a complex double pipe structure,
The double pipe structure eliminates the stagnation of radioactive waste fluid. This eliminates the need for small communication holes as shown in FIG. 2, and eliminates the flow rate of the stored radioactive waste liquid that does not contribute to stirring, thereby improving the stirring efficiency.

Figures 17 and 18 show a seventh embodiment of the present invention.

The waste liquid storage device @IE shown in this embodiment is basically the same as that shown in FIGS. 15 and 16, but differs from this waste liquid storage device 1D in the installation position of the pump suction port. That is, a sleeve-shaped waste liquid receiver tank 52 is provided at the bottom of the connecting pipe 24, and a pump suction pipe 53 is connected to the tank 52.

The top of the waste liquid receiving tank 52 opens into the storage container 3, and this opening is at a position where it receives the downward flow generated in the radioactive waste liquid being stirred within the storage container 3. By providing this, the stirring efficiency can be further improved. In the waste liquid storage device 1E shown in the seventh embodiment, steric reflux is generated in the storage container 3 by jet agitation, so that it is effective in stirring not only the precipitate but also the ionic components.

FIG. 19 shows a working device 55 for handling the waste liquid storage device d1. This working device 55 has an inverted bowl or hemispherical diving bell 56, and a rubber seal 57 is attached to the lower end of the diving bell 56 in an annular shape. It is suspended by a suspension chain or row 158 from a crane (not shown). This working device 55 covers the two-way pipe portion of the waste liquid storage device shown in FIGS. 1 to 14 from above.

However, if an accident occurs in the piping system or pump of the waste liquid storage device 1 and you want to quickly close the piping port by measuring the storage container three times,
If you want to drain water from the piping system below the double pipe while keeping the radioactive waste liquid stored in the storage container 3 for maintenance, inspection, or repair, hang the diving bell 56 and insert the injection guide element from above. 8 and liquid-tightly seal it with an annular rubber seal 57. Place the diving bell 56 at the bottom of the storage container 3.

Once the IW1 is established, the hydrostatic pressure of the radioactive waste liquid can rapidly block the piping port of the double pipe from the storage container 3 side.

When removing the diving bell 56 from the injection guide element 8, liquid is injected from the double pipe side and the injection pressure is increased until it becomes equal to the hydrostatic pressure of the radioactive waste liquid in the storage container 3. This pressurization balances the pressure above and below the diving bell 56, so that the diving bell 56 can be easily pulled down and removed by the hanging chain 58.

In addition, in each embodiment of the present invention, an example in which radioactive waste liquid with high radioactivity is handled has been described, but the waste liquid to be handled does not necessarily have to be radioactive waste liquid, and may be a normal waste liquid.

(Effects of the Invention) As described above, the waste liquid storage device according to the present invention includes a storage container for storing waste liquid, and an injection guide element disposed at the bottom of the storage container and forming an annular spout. ,
A stirring pump device installed outside the storage container, a pump discharge pipe that guides the pressurized flow from the stirring pump to the injection guide element, and a pump that guides the waste liquid stored in the storage container to the stirring pump device. The structure is such that pressurized liquid is ejected radially along the bottom surface of the storage container from the annular ejection port of the injection guide element by the operation of the stirring pump device. There is no need to install a stirring pump device, and therefore strong release Q
Regardless of the type of waste liquid, even if it is a radioactive waste liquid with 4 functions, the precipitate that has settled at the bottom of the storage container is stirred and raised.
It can be stirred evenly. Therefore, the precipitate can be stirred efficiently and uniformly within the storage container, and the stirring efficiency can be improved.

Even if the stirring efficiency is improved, it is safe because there is no need to provide underwater electric equipment such as a submersible motor in the storage container, and the waste liquid can be stored safely and reliably in the storage container.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the waste liquid storage device according to the present invention, FIG. 2 is an enlarged cross-sectional view showing the mounting structure of the injection guide element used in the waste liquid storage device, and FIG. Cross-sectional view showing the first modification of the mounting structure of the injection guide element, the fourth
The figure is a cross-sectional view showing a second modified example of the mounting structure for the injection guide element, FIGS. 5 and 6 are cross-sectional views showing a third modified example of the mounting structure for the injection guide element, and FIG. FIG. 8 is a plan view showing a second modification example of the shape and structure of the injection guide element; FIG. 9 is a waste liquid reservoir equipped with the injection guide element shown in FIG. 8. FIG. 10 is a cross-sectional view showing a second embodiment of the waste liquid storage device according to the present invention, and FIGS. 11 to 13 are third to third embodiments of the waste liquid storage device according to the present invention. 14 is a cross-sectional view taken along line XIV-XIV in FIG. 13; FIG. 15 is a sectional view showing the sixth embodiment of the waste liquid storage device; FIG. 16 is a cross-sectional view showing the sixth embodiment of the waste liquid storage device; 17 and 18 are enlarged cross-sectional views showing the mounting structure of the injection guide element incorporated in the waste liquid storage device shown in FIG.
Fruit/l! ! 11911, which is a cross-sectional view similar to that not shown in Figures 15 and 16, Figure 19- is a diagram showing the working device of the waste liquid storage device, and Figure 20 is a diagram showing the conventional waste liquid storage device. This is a cross-sectional view. 1, IA, IB, IC, ID... waste liquid storage device, 2.
... Concrete frame, 3,3Δ, 38.30... Storage container, 4... Outer pipe, 5... Inner pipe (suction piping)
, 6... Partition plate, 8.8a, sb, 8c, 8d,
8e. 8f... Jet guide element, 10... Annular jet opening, 1
2...+311+pump, 13...transfer pump, 1
5.16...Pump motor, 20...Regeneration device, 2
2... Stirring pump device, 24... Connecting pipe (discharge pipe), 26... Small hole, 27... Annular channel, 31...
・Mounting flange, 32... Gear 11 knob adjustment shim (gear knob style? li! III structure), 36... Guide spacer, 42... Support cylinder (support skirt), 44... Pump, 48...・Diversion plate, 55... Working device, 5
6... Diving bell, 57... Annular rubber seal. Article f Zuhaya Q Zusen 7 Zuhaya 6 Zuko ff Zuna 13 Inwara /4 Zucha t7 Encha /3 Figure

Claims (1)

[Claims] 1. A storage container for storing waste liquid such as radioactive waste liquid, an injection guide element disposed at the bottom of the storage container and forming an annular spout, and an injection guide element installed outside the storage container. It has a stirring pump device, a pump discharge pipe that guides the pressurized liquid from the stirring pump device to the injection guide element, and a pump suction pipe that guides the waste liquid stored in the storage container to the stirring pump device. , by the operation of the stirring pump device,
A waste liquid storage device characterized in that the pressurized liquid is ejected radially from the annular ejection port of the ejection guide element along the bottom surface of the storage container. 2. The waste liquid storage device according to claim 1, wherein the injection guide element is provided with a gap adjustment mechanism capable of adjusting the gap of the annular injection port. 3. The stirring pump device includes a stirring pump and a pump motor disposed outside the storage container, and the pump suction pipe guided to the stirring pump has a transfer pipe branched from the middle to communicate with the regenerating device. The waste liquid storage device according to scope 1. 4. The pump discharge pipe is liquid-tightly connected to the bottom of the storage container, and an injection guide is provided so that the top opening of the pump discharge pipe leading into the storage container is closed in the axial direction and opened all around the circumferential direction. The telescopic storage device according to claim 1, wherein the element is covered. 5. The waste liquid storage device according to claim 1, wherein the pump suction pipe and the discharge pipe are provided as double pipes penetrating the bottom of the storage container. 6. The pump according to claim 5, wherein a small hole is formed in the double pipe section of the pump suction pipe and the discharge pipe connected to the bottom of the storage container to communicate the inner flow and the outer flow. Waste liquid storage device. 7. The waste liquid storage device according to claim 1, wherein the storage container is constructed by lining a storage chamber defined by a concrete frame of a facility building with a lining plate. 8. The storage container is held on the foundation of the storage chamber defined by the concrete frame of the facility building via a support tube or skirt, and a stirring pump device is provided integrally with the storage container. The waste liquid storage device according to scope 1. 9. The injection guide element according to claim 1, wherein the injection guide element is slidably fitted into the inner tube of the double-tube structure, and is fixed to the bottom of the storage container via a fixing device such as a mounting bolt. Waste liquid storage device. 10. The injection guide element has an outer pipe that is a pump discharge pipe,
The claimed scope of the present invention is that the inner pipe is slidably provided in the inner pipe of a double pipe structure, which is the pump suction pipe, so as to be slid downward by its own weight, and selectively covers the discharge opening of the outer pipe to form a check valve function. The waste liquid storage device according to item 9. 11. The waste liquid storage according to claim 1, wherein the jet guide element is configured so that the jet flow jetted from the annular jet port is changed in one direction by a predetermined angle with respect to the radial direction. Device. 12. The jet guide element is configured such that the gap of the annular jet port is changed in the circumferential direction so that a jet flow velocity distribution according to the shape of the storage container and the properties of the waste liquid can be obtained in the circumferential direction. The waste liquid storage device described in Section. 13. The waste liquid storage device according to claim 1, wherein a hemispherical or inverted bowl-shaped diving bell is attached to the bottom of the storage container so as to cover the double pipe opening.