JP6693810B2 - Radioactive waste treatment system - Google Patents

Description

The present invention relates to a technology for treating radioactive waste.

Various studies have been conducted on the treatment method of pollutants (hereinafter referred to as “radioactive waste”) including water and debris contaminated with radioactive substances (for example, radioactive substances leaked from nuclear power plant accidents). (See, for example, Patent Documents 1 and 2).
Patent Document 1 discloses an incineration ash treatment technology in which radioactive waste is incinerated to reduce the volume thereof (hereinafter simply referred to as "incineration ash"), and the incineration ash is solidified with cement or the like.
Further, Patent Document 2 discloses a contaminated water treatment technology in which water contaminated with radioactive substances (hereinafter referred to as “contaminated water”) is mixed with clay minerals and then mixed with a hydraulic material such as cement for treatment. Has been done.

JP, 2013-234881, A JP, 2005-68703, A

However, in Patent Documents 1 and 2, among radioactive wastes, contaminated water and incinerated ash are individually treated. Therefore, although the technique described in Patent Document 1 can provide a treatment technique for incinerated ash, there is still room for consideration in integrally treating radioactive waste including contaminated water. Similarly, although the technique described in Patent Document 2 can provide a technique for treating contaminated water, there is still room for consideration in integrally treating radioactive wastes including incinerated ash.
The present invention, which this problem has been made in view of the, radioactive waste, including the contaminated water and ash may be treated integrally, provides radioactive waste processing system This is an issue.

To solve the above SL problems, radioactive waste processing system according to an embodiment of the present invention, the cement milk production facility for generating a cement milk with contaminated water containing radioactive substances as mixing water, the cement milk product While kneading the kneaded product generated in the kneading equipment and the kneading equipment for kneading the cement milk generated in the equipment and the waste containing the radioactive substance and kneading the incinerated ash reduced in volume to produce a kneaded material It is characterized by having a kneaded material storage tank for storing and a casting facility for filling the kneaded material stored in the kneaded material storage tank into a container in a mold to form a solidified body.

  According to the radioactive waste treatment system of one aspect of the present invention, the cement milk production facility produces cement milk by using the contaminated water as the kneading water, and the kneading facility produces the cement milk and the incinerated ash. And kneading to produce a kneaded product, storing the kneaded product in a kneaded product storage tank, and filling the stored kneaded product into a container in a form using a casting facility to form a solidified body. You can Therefore, the contaminated water and the incinerated ash can be treated in an integrated manner.

  Here, in the radioactive waste treatment system according to one aspect of the present invention, a plurality of contaminated water storage tanks for storing the contaminated water and a fresh water storage tank for storing fresh water containing no radioactive substance are provided, and the fresh water storage is provided. The tank is provided to be able to supply fresh water only for the cement milk production in the cement milk production facility and for cleaning the kneading facility, and among the plurality of contaminated water storage tanks, the first storage tank is The contaminated water is provided so as to be able to supply the cement milk production facility, and the second storage tank of the plurality of contaminated water storage tanks is the casting facility by the facility for moving the formwork associated with the casting facility. Is movably arranged at a lower filling position, and contaminated water supplied to the casting equipment through the kneaded material storage tank at the time of cleaning is stored. It is preferred from the first storage tank is provided to be supplied for the cleaning of cement milk measuring tank of the cement milk production facility.

  With such a configuration, clean water can be used to clean important areas of the equipment, contaminated water is used in appropriate places as cleaning water, and contaminated water after cleaning is used as kneading water. It is more suitable for constructing a radioactive waste treatment system that treats waste in an integrated and continuous manner.

In addition, in the radioactive waste treatment system according to an aspect of the present invention, the cement milk production facility can remove the fresh water from the fresh water storage tank only when the contaminated water from the first storage tank cannot be supplied. It is preferred to use as kneading water to produce cement milk.
With such a configuration, even in the unlikely event that contaminated water cannot be supplied, cement milk can be produced by using clear water as kneading water. Therefore, it is possible to prevent or suppress the system stop due to an unexpected situation. Therefore, it is more suitable for constructing a radioactive waste treatment system that integrally and continuously treats radioactive waste.

  Further, in the radioactive waste treatment system according to one aspect of the present invention, the casting equipment has at least two systems each having a kneading material supply device for filling the kneaded material into a container in a mold and a casting pipe. It is preferable to provide the redundant structure of.

  With such a configuration, even in the unlikely event that the kneaded material supply device or the casting pipe of any one system cannot supply the kneaded material, kneading of the other system is performed. The kneaded material can be continuously supplied from the material supply device and the casting pipe. Therefore, it is possible to prevent or suppress the system stop in the event of an unexpected situation. Therefore, it is more suitable for constructing a radioactive waste treatment system that treats radioactive waste in an integrated and continuous manner.

  As described above, according to the present invention, radioactive waste including contaminated water and incinerated ash can be treated in an integrated manner.

It is a schematic diagram which shows one Embodiment of the radioactive waste processing system of this invention. It is a schematic diagram which shows one Embodiment of the driving apparatus of this invention, the same figure (a) is a top view and (b) is a front view. It is explanatory drawing ((a)-(c)) of the processing process by the placing apparatus of FIG. It is a figure explaining the part of the placing apparatus in a cleaning process.

An embodiment of the present invention will be described below with reference to the drawings. Here, the radioactive waste treatment system provided with the casting device of the present embodiment is equipment for molding cement mixed with contaminated water and incinerated ash in a container in a mold and treating it as a solidified body.
The drawings are schematic. Therefore, it should be noted that the relationship between the thickness and the plane size, the ratio, and the like are different from the actual ones, and the drawings include portions in which the dimensional relationship and ratio are different from each other. In addition, the embodiments described below exemplify devices and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is that the material, shape, structure, and arrangement of components are Etc. are not specified in the following embodiments.

  As shown in FIG. 1, this radioactive waste treatment system includes a kneading machine 1, a cement milk measuring tank 2 and an incinerated ash measuring tank 3 provided on the input side of the kneading machine 1, and a discharge side of the kneading machine 1. The kneaded material storage tank 4 is provided. A load cell and a vibrator are attached to the cement milk measuring tank 2 and the incinerated ash measuring tank 3, respectively, and the kneaded material storage tank 4 is equipped with a stirrer.

  A cement storage tank 5, a fresh water storage tank 6, and a cement milk plant 7 are provided on the upstream side of the cement milk measuring tank 2. The cement in the cement silo 8 can be pressure-fed to the cement storage tank 5 by a pressure blower 9. Further, a pipe (not shown) capable of storing clean water (for example, tap water) is connected to the fresh water storage tank 6 so that fresh water containing no radioactive substance can always be stored.

  The cement milk plant 7 is connected to a pipe 23 capable of supplying water from a first storage tank 21 described later. A pipe 24 for supplying contaminated water contaminated with radioactive substances, for example, is connected to the first storage tank 21, and the contaminated water is appropriately sent from the drainage tank in the site. The cement milk plant 7 mixes the cement in the cement storage tank 5 and the contaminated water in the first storage tank 21 (however, in an emergency, the water in the fresh water storage tank 6) at a predetermined mixing ratio to generate cement milk. The produced cement milk is sent to the cement milk measuring tank 2.

  An incineration ash storage tank 10 is provided on the upstream side of the incineration ash measuring tank 3. The incineration ash storage tank 10 is connected to the incineration ash measuring tank 3 so that the incineration ash in the tank can be delivered. Then, the cement milk measuring tank 2 and the incinerated ash measuring tank 3 cut out the cement milk and the incinerated ash so that each has a predetermined ratio, and the cement milk and the incinerated ash cut out at the predetermined ratio are mixed into the kneading machine 1 It is supposed to be thrown into. The kneading machine 1 kneads a predetermined ratio of cement milk and incinerated ash to produce a kneaded product that is kneaded using contaminated water and incinerated ash. The kneaded material thus generated is stored in the subsequent kneaded material storage tank 4.

Two systems of kneaded material supply devices 11A and 11B are connected to the kneaded material storage tank 4 as a redundant structure. The kneaded material supply devices 11A and 11B of these two systems have the same structure, and each kneaded material supply device 11A and 11B includes the kneaded material supply pumps 12a and 12b connected to the kneaded material storage tank 4 and the kneaded material. It has supply pipes 13a and 13b connected to the delivery sides of the supply pumps 12a and 12b, respectively, and driving pipes 14a and 14b are provided at the tips of the supply pipes 13a and 13b, respectively.
The placing pipes 14 a and 14 b are mounted on a placing device 30 described later and are a component of the placing device 30. Below the setting device 30, for example, a lateral movement device (for example, a chain conveyor) 50 that can swivel and convey along an oval orbit is installed. A plurality of molds 40 are placed on the lateral movement device 50 while being separated from each other along the transport direction.

  As shown in FIG. 2, the driving apparatus 30 has a post 31 having a truss structure, and the standing post 31 is provided with a support frame 32 that can be vertically moved up and down along the post 31. The support frame 32 has two horizontal frames 33 and a casting pipe support frame 34 provided between the horizontal frames 33. These frames 33 and 34 project in the horizontal direction toward the lateral movement device 50 side. The support frame 32 is provided with a vertical slide mechanism including a drive motor 29 having a speed reduction mechanism, and is driven by the drive motor 29 between a lowered position indicated by a solid line and a raised position indicated by a chain double-dashed line in FIG. It can be raised and lowered to any position.

  In the support frame 32, the casting pipes 14a and 14b are provided at the tip of a centering casting pipe support frame 34 with their axes perpendicular to each other. A vertical slide mechanism including a drive motor 35 having a speed reduction mechanism is provided on the driving pipe support frame 34. The driving apparatus 35 drives the driving apparatus 30 to set the height of the driving tubes 14a and 14b to an arbitrary position between a lowered position shown by a solid line in FIG. In addition, the driving pipes 14a and 14b can be independently moved.

  Further, the support frame 32 has a horizontally supported annular vibrator support frame 36 at the ends of the two horizontal frames 33 on both sides. A plurality of vibrators 37 are arranged on the vibrator support frame 36 so as to be circumferentially separated from each other and surround the peripheries of the casting pipes 14a and 14b with their axes being perpendicular to each other. The number of the plurality of vibrators 37 is not limited. In the present embodiment, as shown in FIG. 4A, the concentric pipes surrounding the center casting pipes 14a and 14b are concentrically arranged at equal intervals in the circumferential direction at eight locations.

  Here, in the present embodiment, a dripping prevention pan 60 that is slidably movable in the horizontal direction is supported on the upper portion of the support leg 62 arranged at the casting position of the mold 40. The dripping prevention pan 60 is a plate member having a rectangular shape in a plan view. The installation height of the dripping prevention pan 60 is higher than the upper part of the mold 40, and when the support frame 32 is in the raised position (the position indicated by the chain double-dashed line in FIG. 7B). Is provided at a position lower than the lower end of the vibrator 37.

  The dripping prevention pan 60 is provided on the upper part of the support leg 62 so as to be slidable in the horizontal direction by a drive cylinder 61 whose axis is horizontally arranged. The liquid dripping prevention pan 60 is driven by the drive cylinder 61 to a vertically facing position with respect to the driving pipes 14a and 14b supported by the support frame 32 and the plurality of vibrators 37, and a retracted position retracted laterally. It is movable.

  The entire radioactive waste treatment system including the above-mentioned placing device 30 can perform the solidified body treatment unattended by automatic control by a control device (not shown) including a computer, so that the operator can operate safely. It is possible to monitor the operating status of the system from the operation room provided at the location.

  Here, as shown in FIG. 1, this radioactive waste treatment system includes two contaminated water storage tanks 21 and 22 that store contaminated water and the above-described fresh water storage tank 6 that stores fresh water that does not contain radioactive substances. It has and. The fresh water storage tank 6 is provided with a pipe capable of supplying fresh water only for cleaning the cement milk plant 7 which is a cement milk production facility and the kneading machine 1.

  Of the two contaminated water storage tanks 21 and 22, the first storage tank 21 is provided with a pipe capable of supplying contaminated water to the cement milk plant 7. The cement milk plant 7 can generate cement milk by using the fresh water from the fresh water storage tank 6 as the kneading water as an emergency measure only when the contaminated water from the first storage tank 21 cannot be supplied. It is configured.

On the other hand, the second storage tank 22 is arranged so as to be movable to the filling position below the placing device 30 by the lateral moving device 50 which is a moving device of the form 40 accompanying the placing device 30 which is the placing device. ing.
A reflux pump 25 is attached to the second storage tank 22, and the reflux pump 25 is connected to a three-branch pipe 26 including electromagnetic valves 27A, 27B, and 27C that can be electrically driven. In the three-branch pipe 26, the first branch pipe 26A is connected to the kneaded material storage tank 4, the second branch pipe 26B is connected to the cement milk measuring tank 2, and the third branch pipe 26C is the first. It is connected to the storage tank 21.

Next, solidified body treatment by the radioactive waste treatment system will be described.
In this radioactive waste processing system, solidified body processing is executed by automatic control by a control device that manages the entire system. When the solidified body treatment is performed, the cement milk plant 7 receives the contaminated water containing the radioactive material from the first storage tank 21 and the cement from the cement storage tank 5 to receive the first storage. Cement milk is produced using the contaminated water supplied from the tank 21 as kneading water. The produced cement milk is sent from the cement milk plant 7 to the cement milk measuring tank 2.

  On the other hand, the incineration ash that has been reduced in volume by incinerating the waste containing the radioactive material by the pretreatment facility is sent from the incineration ash storage tank 10 to the incineration ash weighing tank 3. Next, the control device cuts out the cement milk measured in the cement milk measuring tank 2 and the incinerated ash measured in the incinerated ash storage tank 10 to the kneading machine 1 which is a kneading facility. The kneader 1 kneads cement milk and incinerated ash at a predetermined ratio to produce a kneaded product. The kneaded material generated by the kneading machine 1 is stored in the kneaded material storage tank 4 while being stirred.

Next, the control device drives the lateral movement device 50 provided below the placing device 30, which is the placing equipment, to move the mold 40 to be filled with the kneaded material to the filling position. In the preliminary work process, a flexible container (hereinafter, simply referred to as “container”) 40f is accommodated in the mold 40 in a predetermined posture in a preliminary work process.
The container 40f is a flexible container having a lightweight rectangular sheet woven of a chemical fiber such as polyethylene or polypropylene and a hanging belt capable of suspending and supporting the rectangular sheet. The container 40f is capable of suspending and supporting the entire bag by lifting the loop portion of the suspension belt with a work machine such as a forklift or a crane.

  When the mold 40 accommodating the container 40f is located at the filling position, the control device horizontally slides the dripping prevention pan 60 of the placing device 30 to the retreat position, and thereafter, the entire support frame 32. Is lowered from above the mold 40 to the filling height in the mold 40.

Next, as shown in FIG. 3A, when the support frame 32 is lowered to the filling height, the control device drives the kneaded material supply devices 11A and 11B and starts the vibration of the plurality of vibrators 37. As a result, the kneaded material in the kneaded material storage tank 4 is delivered to the casting tubes 14a, 14b via the supply tubes 13a, 13b, and the kneaded material is quantitatively filled and supplied in the container 40f of the mold 40. . In the figure, the arrow M1 indicates the image of integrally lowering the support frame 32, the casting pipes 14a and 14b, and the plurality of vibrators 37 to the lowest position in the mold 40.
At the time of filling and supplying, in order to prevent the kneaded material from scattering, the tip ends of the casting pipes 14a and 14b are filled into the container 40f while being filled, and the opening of the container 40f and its periphery are provided on the surface of the vibrator support frame 36 or the like. The height is controlled so as to be covered by.

  As shown in FIG. 2B, the control device maintains the state that the tips of the casting pipes 14a and 14b are buried in the kneaded product, and the casting pipes 14a and 14b and the respective casting pipes 14a and 14b according to the filling amount of the kneaded product. The height is controlled so that the vibrator 37 rises. The burial depth of the tips of the casting pipes 14a and 14b is controlled so as to be located at a depth of, for example, 10 to 20 cm from the upper surface of the filled kneaded material. In the figure, the arrow indicated by reference sign M2 indicates the image of raising the support frame 32, the casting pipes 14a and 14b, and the plurality of vibrators 37 integrally according to the filling amount of the kneaded material.

  The control device fills and supplies the kneaded material into the container 40f, and vibrates the kneaded material by a plurality of vibrators 37 arranged around the casting pipes 14a and 14b to compact the kneaded material. The filling amount (height) of the kneaded material is automatically detected by a filling amount detection sensor (not shown) provided on the support frame 32. As the filling amount detection sensor, for example, a laser sensor or an ultrasonic sensor can be used.

  The control device constantly monitors the filling amount (height) of the kneaded product by the filling amount detection sensor, and controls the height so that the support frame 32 itself is raised according to the filling amount of the kneading product. Next, when the kneaded material is filled to the desired height, the control device stops the kneaded material supply devices 11A and 11B and raises only the casting pipes 14a and 14b as shown in FIG. , The tips of the driving pipes 14a and 14b are pulled out to a separated position above the form frame 40 and separated. In addition, in the same figure, the arrow shown with the code | symbol M3 has shown the image which raises only the casting pipes 14a and 14b.

  By the plurality of vibrators 37 around the casting pipes 14a, 14b, the control device continues to vibrate for a predetermined time until the upper surface of the kneaded material in the container 40f becomes substantially horizontal, while the support frame 32 as a whole rises. The vibrators 37 are gradually pulled out above the mold 40 and separated from each other. In the figure, an arrow M4 indicates an image in which the vibrators 37 are gradually pulled out and separated from each other above the mold 40 as the support frame 32 as a whole rises.

  After that, the control device positions the entire support frame 32 at the further separated position. The control device separates each vibrator 37 from the kneaded material in the container 40f and raises the entire support frame 32, and then horizontally moves the dripping prevention pan 60 to the lower part of the support frame 32, and the dripping prevention pan 60 It prevents scattering and dripping of the kneaded material from the casting pipes 14a, 14b and the vibrators 37 on the support frame 32 side.

  Finally, the control device drives the lateral movement device 50 to move the mold 40 to be filled with the kneaded material to the filling position, and the operator operates the mold 40 already filled with the kneaded material. Move to the next process side. As shown in FIG. 1, after confirming the completion of the molding for a predetermined time, the operator removes the filled container 40f from the inside of the mold 40 filled with the kneaded material by a working machine such as a crane and moves it to the nursery. Let

Next, the cleaning processing of this radioactive waste processing system will be described.
In this radioactive waste treatment system, the system is cleaned every predetermined time period or every predetermined period, and when the solidified body treatment is stopped or when a predetermined inspection is performed. Here, in this radioactive waste treatment system, contaminated water containing a radioactive substance is used as washing water for the equipment used for treating radioactive waste, and contaminated water after the washing is used as kneading water.

  Specifically, the cleaning process is executed when there is no kneaded material in the kneader 1 or the kneaded material storage tank 4. When the cleaning process is executed, the control device first cleans the inside of the kneading machine 1 using fresh water from the fresh water storage tank 6. The clean water after cleaning the kneading machine 1 becomes contaminated water containing radioactive substances. Then, the inside of the kneaded material storage tank 4 is washed by stirring the contaminated water while being stored in the kneaded material storage tank 4.

  Subsequently, the control device drives the lateral movement device 50 provided below the placing device 30 which is the placing equipment, and moves the second cleaning storage tank 22 to the “filling position”. When the second storage tank 22 is located at the filling position, the control device slides the dripping prevention pan 60 of the placing device 30 in the horizontal direction to move to the retreat position.

  After that, as shown in FIG. 4, the control device lowers the entire support frame 32 from above the second storage tank 22 to the “cleaning height” in the second storage tank 22. Next, when the support frame 32 is lowered to the cleaning height, the control device drives the kneaded material supply devices 11A and 11B of two systems. As a result, the cleaning water in the kneaded material storage tank 4 cleans the insides of the kneaded material supply pumps 12a and 12b, the supply pipes 13a and 13b, and the casting pipes 14a and 14b having the two-system redundant structure, The second storage tank 22 is filled up.

  The cleaning water filled in the second storage tank 22 is circulated to the kneaded material storage tank 4 through the first branch pipe 26A of the three branch pipes 26 shown in FIG. It is circulated to the cement milk measuring tank 2 through the pipe 26B. Further, among the three branch pipes 26, the wash water guided to the first storage tank 21 via the third branch pipe 26C is passed through the pipe 23 by the pumping pump attached to the first storage tank 21. Is supplied to the cement milk plant 7.

  As a result, in this radioactive waste treatment system, the contaminated water containing the radioactive substance can be used as the washing water for the equipment used for the treatment in the closed system in which the washing water is circulated throughout the system. Therefore, the contaminated water does not flow out of the radioactive waste treatment system. Then, the cleaning water filled in the second storage tank 22 is supplied again from the first storage tank 21 to the cement milk plant 7 after cleaning. Therefore, the contaminated water after the cleaning can be used as kneading water.

Next, the operation and effect of this radioactive waste treatment system will be described.
As described above, this radioactive waste treatment system uses the contaminated water containing radioactive substances as kneading water to produce cement milk, and incinerates the cement milk and the waste containing radioactive substances to reduce the incinerated ash. Can be kneaded to produce a kneaded product, and the kneaded product can be filled in a container 40f in the mold 40 to be solidified. Therefore, the contaminated water and the incinerated ash can be treated in an integrated manner.

  Further, according to this radioactive waste treatment system, the contaminated water containing radioactive substances is used as the washing water for the equipment used for the treatment, and the contaminated water after the washing is used as the kneading water. And can be processed continuously.

  Furthermore, since this radioactive waste treatment system includes two contaminated water storage tanks 21 and 22 that store contaminated water and a fresh water storage tank 6 that stores fresh water that does not contain radioactive substances, the important points of the equipment. For cleaning, clean water can be used, contaminated water is used in appropriate places as cleaning water, and the contaminated water after cleaning is reused as kneading water, so radioactive waste is treated in an integrated and continuous manner. Is excellent at doing.

  According to this radioactive waste treatment system, the cement milk plant 7 uses the fresh water from the fresh water storage tank 6 as the kneading water only in an emergency when the contaminated water from the first storage tank 21 cannot be supplied. Since cement milk is produced, even in the unlikely event that contaminated water cannot be supplied, fresh water can be used as kneading water to produce cement milk. Therefore, it is possible to prevent or suppress the system stop due to an unexpected situation.

  Further, according to this radioactive waste treatment system, the casting device 30 has the kneaded product supply devices 11A and 11B and the casting pipes 14a and 14b for filling the container 40f in the mold 40 with the kneaded product, respectively. Since at least two systems of redundant structure are provided, in the unlikely event that an unexpected situation occurs in which any one system of the kneaded material supply devices 11A and 11B or the casting pipes 14a and 14b cannot supply the kneaded material. Also, the kneaded material can be continuously supplied from the kneaded material supply devices 11A and 11B and the casting pipes 14b and 14a of other systems. Therefore, it is excellent in preventing or suppressing system stoppage in the event of an unexpected situation.

As described above, according to this radioactive waste treatment system, radioactive waste including contaminated water and incinerated ash can be treated in an integrated manner. The radioactive waste treatment system according to the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, as the incineration ash, an example in which a waste containing a radioactive substance is incinerated and reduced in volume is shown, but the present invention is not limited to this, and in treating contaminated water, a kneaded material is used. In the production of, the incineration ash reduced in volume by incinerating the waste containing no radioactive substance may be used. However, in the integrated treatment of radioactive waste, as shown in the above embodiment, the contaminated water containing the radioactive substance is used, and the incineration ash obtained by incineration of the waste containing the radioactive substance is used. It is preferable to dispose of radioactive waste in an integrated manner.

1 Kneader 2 Cement milk measuring tank 3 Incinerated ash measuring tank 4 Kneaded ash storage tank 5 Cement storage tank 6 Fresh water storage tank 7 Cement milk plant 8 Cement silo 9 Pressure blower 10 Incinerator ash storage tank 11A, 11B Kneaded ash storage device 12a, 12b Kneaded material supply pump 13a, 13b Supply pipe 14a, 14b Placing pipe 21 First storage tank (contaminated water storage tank)
22 Second storage tank (contaminated water storage tank)
23, 24 Pipe 25 Reflux pump 26 Three-branch pipe 26A, 26B, 26C Branch pipe 27A, 27B, 27C Electromagnetic valve 29 Drive motor 30 Placing device 31 Post 32 Support frame 33 Horizontal frame 34 Placing pipe support frame 35 Drive motor 36 Vibrator Support Frame 37 Vibrator 40 Form 40f Flexible Container (Flexible Container)
50 Lateral movement device 60 Drip prevention pan 61 Drive cylinder 62 Support leg

Claims (2)

Cement milk production facility for producing cement milk using contaminated water containing radioactive substances as kneading water, and incinerated ash reduced in volume by incinerating the cement milk produced in the cement milk production facility and waste containing radioactive substances And a kneading equipment for kneading to produce a kneaded material, a kneaded material storage tank for storing the kneaded material generated in the kneading equipment while stirring, and a kneading material stored in the kneaded material storage tank as a formwork A casting facility for filling the inner container into a solidified body, a plurality of contaminated water storage tanks for storing the contaminated water, and a fresh water storage tank for storing fresh water containing no radioactive material,
The fresh water storage tank is provided so as to be able to supply fresh water only for producing the cement milk in the cement milk producing facility and for cleaning the kneading facility,
Of the plurality of contaminated water storage tanks, the first storage tank is provided to supply contaminated water to the cement milk production facility,
Of the plurality of contaminated water storage tanks, the second storage tank is movably arranged at a filling position below the casting equipment by the equipment for moving the formwork associated with the casting equipment, and is also washed. Sometimes the contaminated water supplied to the casting equipment via the kneaded material storage tank is stored, and further, the contaminated water is used for cleaning the cement milk measuring tank of the cement milk production equipment from the first storage tank. A radioactive waste treatment system characterized by being provided so that it can be supplied . The cement milk product facility, claims contaminated water from the first storage tank is only when a non supplied, is provided to be generated cement milk with fresh water from the fresh water storage tank as mixing water Item 1. The radioactive waste treatment system according to Item 1 .

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