JP2017211342A - Processing method of radioactive waste, and radioactive waste processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an overall processing method of radioactive waste including polluted water and incineration ash containing a radioactive material.SOLUTION: Polluted water containing a radioactive material is used as kneading water for cement milk, and the cement milk and incineration ash obtained by incinerating waste containing a radioactive material to reduce the volume are kneaded together to form a kneaded mixture, and the kneaded mixture is filled into a container 40f in a formwork 40, and processed as a solidified body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radioactive waste processing method and a radioactive waste processing system.

Various investigations have been made on methods for treating pollutants containing water and debris (hereinafter referred to as “radioactive waste”) contaminated with radioactive materials (eg, radioactive materials leaked out in an accident at a nuclear power plant). (For example, refer to Patent Documents 1 and 2).
Patent Document 1 discloses an incineration ash treatment technique in which radioactive waste is incinerated ash obtained by incineration (hereinafter simply referred to as “incineration ash”), and the incineration ash is solidified with cement or the like.
Patent Document 2 discloses a contaminated water treatment technique in which water contaminated with radioactive substances (hereinafter referred to as “contaminated water”) is mixed with clay mineral and then mixed with a hydraulic material such as cement. Has been.

JP 2013-234881 A Japanese Patent Laying-Open No. 2015-68703

However, in Patent Documents 1 and 2, among radioactive waste, contaminated water and incinerated ash are individually treated. Therefore, although the technique described in Patent Document 1 can provide a technique for treating incinerated ash, there is still room for examination in order to treat radioactive waste including contaminated water in an integrated manner. Similarly, although the technique described in Patent Document 2 can provide a treatment technique for contaminated water, there is still room for examination in the integrated treatment of radioactive waste including incinerated ash.
Therefore, the present invention has been made paying attention to such problems, and a radioactive waste processing method and radioactive material capable of integrally processing radioactive waste including contaminated water and incinerated ash. It is an object to provide a waste treatment system.

  In order to solve the above-described problem, a method for treating radioactive waste according to one embodiment of the present invention generates cement milk using contaminated water containing a radioactive substance as kneaded water, and discards the cement milk and the radioactive substance. A kneaded product is produced by kneading incinerated ash reduced in volume by incineration of the product, and the kneaded product is filled into a container in a mold to form a solidified product. Therefore, according to the radioactive waste processing method of one embodiment of the present invention, contaminated water and incinerated ash can be processed in an integrated manner.

  Here, in the technique of patent document 1 or 2, the processing method and processing system of the radioactive waste which process a process target continuously are not disclosed, but radioactive waste is processed continuously and continuously. There is still room for consideration above.

  That is, in the method for treating radioactive waste according to one aspect of the present invention, using contaminated water containing a radioactive substance as washing water for facilities used for the treatment, and using the washed contaminated water as the kneaded water preferable. In such a configuration, since the contaminated water is used as the washing water, and the contaminated water after the washing is used as the kneading water, the radioactive waste processing method for integrally and continuously treating the radioactive waste It is suitable for constructing.

  In order to solve the above problems, a radioactive waste treatment system according to one aspect of the present invention includes a cement milk generating facility that generates cement milk using contaminated water containing a radioactive substance as kneaded water, and the cement milk. A kneading facility for kneading the cement milk produced in the production facility and the incinerated ash reduced in volume by incinerating the waste containing the radioactive material to produce a kneaded product, and stirring the kneaded product produced in the kneading facility The kneaded product storage tank is stored while the kneaded product stored in the kneaded product storage tank is filled in a container in a mold to form a solidified body.

  According to the radioactive waste treatment system of one aspect of the present invention, cement milk is generated using cemented water as the kneaded water by the cement milk generating facility, and the cement milk and incinerated ash using the contaminated water is generated by the kneading facility. To produce a kneaded product, to store the kneaded product in a kneaded product storage tank, and to fill the stored kneaded product into a container in a mold with a casting facility to form a solidified body. Can do. Therefore, the contaminated water and the incinerated ash can be treated in an integrated manner.

  Here, the radioactive waste treatment system according to one aspect of the present invention includes a plurality of contaminated water storage tanks for storing the contaminated water, and a fresh water storage tank for storing fresh water not containing a radioactive substance, and the fresh water storage The tank is provided so that fresh water can be supplied only for the production of the cement milk and the washing of the kneading equipment in the cement milk production facility, and the first storage tank among the plurality of contaminated water storage tanks is The cement milk generation facility is provided so as to be able to supply contaminated water, and among the plurality of contaminated water storage tanks, a second storage tank is provided by the moving equipment of the mold attached to the placement equipment. Is disposed so as to be movable at a lower filling position, and stores the contaminated water supplied to the placement equipment through the kneaded material storage tank during cleaning, and further 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, it is possible to clean the essential parts of the equipment using clean water, and use the contaminated water as appropriate for the wash water, and further use the washed contaminated water as the kneaded water. It is more suitable for constructing a radioactive waste treatment system that integrally and continuously treats waste.

Further, in the radioactive waste treatment system according to one aspect of the present invention, the cement milk production facility is configured to supply fresh water from the fresh water storage tank only when contaminated water from the first storage tank cannot be supplied. It is preferable to produce cement milk using it as kneading water.
With such a configuration, it is possible to produce cement milk using fresh water as kneaded water even in the unlikely event that contaminated water cannot be supplied. Therefore, it is possible to prevent or suppress a system stop due to an unexpected situation. Therefore, it is more suitable for constructing a radioactive waste treatment system that processes radioactive waste in an integrated and continuous manner.

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

  With such a configuration, in the unlikely event that an unexpected situation occurs in which any one system of the kneaded material supply device or the placing tube cannot supply the kneaded material, the kneading of other systems The kneaded material can be continuously supplied from the material supply device and the placing tube. Therefore, it is possible to prevent or suppress a system stop due to an unexpected situation. Therefore, it is much more suitable for constructing a radioactive waste processing system that processes 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 placement apparatus of this invention, The figure (a) is a top view, (b) is a front view. It is explanatory drawing ((a)-(c)) of the process process by the placement apparatus of FIG. It is a figure explaining the part of the placement apparatus in a washing process.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. Here, the radioactive waste processing system provided with the placing device of the present embodiment is a facility for processing cement as kneaded using contaminated water and incinerated ash in a container in a mold and processing as a solidified body.
The drawings are schematic. For this reason, it should be noted that the relationship between the thickness and the planar dimension, the ratio, and the like are different from the actual ones, and the dimensional relationship and the ratio are different between the drawings. Further, the following embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure, and arrangement of components. Etc. are not specified in the following embodiments.

  As shown in FIG. 1, this radioactive waste treatment system includes a kneader 1, a cement milk metering tank 2 and an incinerated ash metering tank 3 provided on the input side of the kneader 1, and a discharge side of the kneader 1. The kneaded material storage tank 4 provided is provided. The cement milk measuring tank 2 and the incinerated ash measuring tank 3 are each provided with a load cell and a vibrator, 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. In the cement storage tank 5, the cement of the cement silo 8 can be pumped by the pumping blower 9. In addition, 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 be stored at all times.

  The cement milk plant 7 is connected to a pipe 23 capable of supplying water from a first storage tank 21 described later. For example, a pipe 24 for supplying contaminated water contaminated with a radioactive substance is connected to the first storage tank 21, and the contaminated water is appropriately sent from the drainage in the field. The cement milk plant 7 generates cement milk by mixing 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. The produced cement milk is delivered to the cement milk metering 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 sent out. 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 of them has a predetermined ratio, and the cement milk and the incinerated ash cut out to the predetermined ratio are mixed into the kneader 1. It is to be thrown into. The kneader 1 kneads a predetermined proportion of cement milk and incinerated ash to produce a kneaded product kneaded using contaminated water and incinerated ash. The produced kneaded material is stored in the subsequent kneaded material storage tank 4.

To the kneaded material storage tank 4, two systems of kneaded material supply devices 11A and 11B are connected as a redundant structure. These two systems of kneaded material supply devices 11A and 11B have the same structure, and each kneaded material supply device 11A and 11B includes kneaded material supply pumps 12a and 12b connected to the kneaded material storage tank 4, and kneaded material. The supply pipes 13a and 13b are connected to the delivery sides of the supply pumps 12a and 12b, respectively, and the placement pipes 14a and 14b are provided at the tips of the supply pipes 13a and 13b, respectively.
The placement pipes 14 a and 14 b are mounted on a placement apparatus 30 described later, and are components of the placement apparatus 30. Below the placing device 30, for example, a lateral movement device (for example, a chain conveyor) 50 capable of turning and conveying along an elliptical track is installed. On the lateral movement device 50, a plurality of molds 40 are placed separately along the transport direction.

  As shown in FIG. 2, the driving device 30 has a post 31 having a truss structure, and the post 31 that is erected is provided with a support frame 32 that can be moved up and down along the post 31. The support frame 32 includes two horizontal frames 33 and a placement tube 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 includes a vertical slide mechanism including a drive motor 29 having a speed reduction mechanism. When the drive motor 29 is driven, the support frame 32 is moved between a lowered position indicated by a solid line and an elevated position indicated by a two-dot chain line in FIG. It can be raised and lowered to any position.

  The supporting frame 32 is provided with the above-mentioned casting pipes 14a and 14b perpendicular to the axis at the tip of a central casting pipe support frame 34. An upper and lower slide mechanism including a drive motor 35 having a speed reduction mechanism is provided on the placement tube support frame 34. The driving device 30 is driven by a drive motor 35 so that the height of the driving tubes 14a and 14b is set at an arbitrary position between a lowered position and a raised position (not shown) indicated by a solid line in FIG. In addition, the placement tubes 14a and 14b can be moved independently.

  Further, the support frame 32 has an annular vibrator support frame 36 that is horizontally supported at the tips of two horizontal frames 33 on both sides. In the vibrator support frame 36, a plurality of vibrators 37 are arranged with their axes perpendicular to each other so as to surround the periphery of the placement pipes 14a and 14b in the circumferential direction. The number of the plurality of vibrators 37 is not limited. In the present embodiment, as shown in FIG. 5A, the concentric circles surrounding the center placement pipes 14a and 14b are equally arranged in the circumferential direction and arranged at eight locations.

  Here, in the present embodiment, a dripping prevention pan 60 that is slidable in the horizontal direction is supported on the upper portion of the support leg 62 arranged at the placement position of the mold 40. The dripping prevention pan 60 is a plate member having a rectangular shape in 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 of the two-dot chain line in FIG. 5B), It is provided at a position lower than the lower end of the vibrator 37.

  The dripping prevention pan 60 is provided on an upper portion of the support leg 62 so as to be slidable in the horizontal direction by a drive cylinder 61 whose axis is horizontally arranged. When the drive cylinder 61 is driven, the dripping prevention pan 60 is positioned at a position facing the placement pipes 14a and 14b and the plurality of vibrators 37 supported by the support frame 32 in the vertical direction and a retreat position retracted laterally. It can be moved.

  In addition, the whole radioactive waste processing system including the placing device 30 described above can perform solidification processing unattended by automatic control by a control device (not shown) including a computer. The operating status of the system can be monitored from the operation room provided at the site.

  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 not containing radioactive substances. And. The fresh water storage tank 6 is provided with a pipe so that fresh water can be supplied only to the cement milk plant 7 which is a cement milk generation facility and the kneading machine 1 for cleaning.

  Of the two contaminated water storage tanks 21, 22, the first storage tank 21 is provided with a pipe so that the contaminated water can be supplied to the cement milk plant 7. The cement milk plant 7 can generate cement milk using the fresh water from the fresh water storage tank 6 as kneaded water as an emergency response 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 disposed so as to be movable to a filling position below the placement device 30 by a lateral movement device 50 which is a movement facility for the mold 40 attached to the placement device 30 which is the placement facility. ing.
A recirculation pump 25 is attached to the second storage tank 22, and the recirculation pump 25 is connected to a three-branch pipe 26 having electromagnetic valves 27 </ b> A, 27 </ b> B, and 27 </ b> C 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 metering tank 2, and the third branch pipe 26C is the first branch pipe 26C. The storage tank 21 is connected.

Next, solidified material processing by the radioactive waste processing system will be described.
In this radioactive waste processing system, solidified material processing is executed by automatic control by a control device that manages the entire system. When the solidified body processing is executed, the cement milk plant 7 receives the supply of contaminated water containing the radioactive substance from the first storage tank 21 and the supply of 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 kneaded water. The produced cement milk is sent from the cement milk plant 7 to the cement milk metering tank 2.

  On the other hand, the incinerated ash that has been reduced in volume by incineration of the waste containing the radioactive material by the pretreatment facility is sent from the incinerated ash storage tank 10 to the incinerated ash measuring tank 3. Next, the control device cuts the cement milk measured in the cement milk measuring tank 2 and the incinerated ash measured in the incineration ash storage tank 10 into the kneading machine 1 which is a kneading facility. The kneading machine 1 kneads cement milk and incinerated ash at a predetermined ratio to generate a kneaded product. The kneaded material generated by the kneader 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 placement device 30 as the placement equipment, and moves the mold 40 to be filled with the kneaded material to the filling position. A flexible container (hereinafter simply referred to as “container”) 40 f is accommodated in advance in a predetermined posture by the operator in a preliminary work process in the mold 40.
The container 40f is a flexible container having a lightweight square sheet woven with chemical fibers such as polyethylene and polypropylene and a suspension belt that can support the square sheet in a suspended manner. The container 40f can suspend and support the entire bag by lifting the loop portion of the suspension belt with a working machine such as a forklift or a crane.

  When the mold 40 containing the container 40f is located at the filling position, the control device slides the dripping prevention pan 60 of the placing device 30 in the horizontal direction and moves it to the retracted position, and then 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 11 </ b> A and 11 </ b> B and starts vibration of the plurality of vibrators 37. Thereby, the kneaded material in the kneaded material storage tank 4 is sent to the placement tubes 14a and 14b via the supply tubes 13a and 13b, and the kneaded material is quantitatively filled and supplied into the container 40f of the mold 40. . In the figure, an arrow indicated by reference numeral M1 indicates an image in which the support frame 32, the placement tubes 14a and 14b, and the plurality of vibrators 37 are integrally lowered to the lowest lowered position in the mold 40.
At the time of filling and supplying, in order to prevent the kneaded material from scattering, the pipes 14a and 14b are filled with the tips inserted into the container 40f, and the opening of the container 40f and the periphery thereof are provided on the surface of the vibrator support frame 36 and the like. The height is controlled to cover.

  As shown in FIG. 4B, the control device maintains the state where the tips of the placement tubes 14a and 14b are buried in the kneaded product, and according to the filling amount of the kneaded product, The height is controlled so that the vibrator 37 rises. The buried depth of the tips of the placing tubes 14a and 14b is controlled so as to be located, for example, at a depth of 10 to 20 cm from the upper surface of the filled kneaded material. In addition, in the same figure, the arrow shown by the code | symbol M2 has shown the image which raises the support frame 32, casting tube 14a, 14b, and the some vibrator 37 integrally according to the filling amount of a kneaded material.

  The control device vibrates and compacts the kneaded material by a plurality of vibrators 37 disposed around the placing tubes 14a and 14b while filling and supplying the kneaded material into the container 40f. 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 type sensor or an ultrasonic sensor can be used.

  The control device constantly monitors the filling amount (height) of the kneaded material 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 kneaded material. Next, when the kneaded material is filled up to the desired height, the control device stops the kneaded material supply devices 11A and 11B and raises only the placing tubes 14a and 14b as shown in FIG. Then, the tips of the placing tubes 14a and 14b are pulled out to a separation position above the mold 40 and separated. In addition, in the same figure, the arrow shown by the code | symbol M3 has shown the image which raises only the casting pipes 14a and 14b.

  The controller continues to vibrate for a predetermined time until the upper surface of the kneaded material in the container 40f becomes substantially horizontal by the plurality of vibrators 37 around the placing pipes 14a and 14b, and by raising the entire support frame 32, Gradually, each vibrator 37 is pulled out above the mold 40 and separated. In the figure, an arrow indicated by a symbol M4 indicates an image in which each vibrator 37 is gradually pulled out and separated above the mold 40 by the entire support frame 32 rising.

  Thereafter, the control device positions the entire support frame 32 at a further separated position. When the control device separates each vibrator 37 from the kneaded material in the container 40f and raises the entire support frame 32, the control device moves the dripping prevention pan 60 horizontally to the lower portion of the support frame 32, and the dripping prevention pan 60 This prevents the kneaded material from splashing and dripping from the placing tubes 14a, 14b on the support frame 32 side and the vibrators 37.

  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 filled with the present kneaded material. Move toward the next process. As shown in FIG. 1, after confirming the completion of molding for a predetermined time, the operator removes the filled container 40f from the mold 40 filled with the kneaded material by a working machine such as a crane and moves to a curing place. Let

Next, the cleaning process of this radioactive waste processing system will be described.
In this radioactive waste processing system, the system is cleaned every predetermined time or every predetermined period, and when the solidified material processing is stopped or at a predetermined inspection. Here, this radioactive waste treatment system uses contaminated water containing radioactive substances as cleaning water for the equipment used for the treatment of radioactive waste, and uses the cleaned contaminated water as kneaded water.

  Specifically, the cleaning process is executed when there is no kneaded material in the kneader 1 and the kneaded material storage tank 4. When the cleaning process is executed, the control device first cleans the inside of the kneader 1 using the fresh water from the fresh water storage tank 6. The fresh water after washing the kneading machine 1 becomes contaminated water containing a radioactive substance. Subsequently, the contaminated water is agitated in a state where it is stored in the kneaded product storage tank 4, whereby the inside of the kneaded product storage tank 4 is washed.

  Subsequently, the control device drives the lateral movement device 50 provided below the placement device 30 as the placement facility, and moves the second storage tank 22 for cleaning 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 and moves to the retreat position.

  Thereafter, 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 two systems of the kneaded material supply devices 11A and 11B. As a result, the washing water in the kneaded material storage tank 4 is cleaned while the insides of the kneaded material supply pumps 12a and 12b, the supply pipes 13a and 13b, and the placing pipes 14a and 14b having two redundant structures are washed. The second storage tank 22 is filled.

  The wash water filled in the second storage tank 22 is circulated to the kneaded material storage tank 4 via the first branch pipe 26A in the three-branch pipe 26 shown in FIG. It is circulated to the cement milk measuring tank 2 through the pipe 26B. Furthermore, the wash water led to the first storage tank 21 through the third branch pipe 26 </ b> C among the three branch pipes 26 is passed through the pipe 23 by a pumping pump attached to the first storage tank 21. And supplied to the cement milk plant 7.

  Thereby, in this radioactive waste processing system, the contaminated water containing a radioactive substance can be used as the cleaning water of the facility used for the said process in the closed system which circulates cleaning water over the whole 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 washing 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 generates cement milk using contaminated water containing radioactive substances as kneaded water, and incinerate ash obtained by incineration of the waste containing the cement milk and radioactive substances to reduce the volume. Can be kneaded to produce a kneaded product, and the kneaded product can be filled into 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 the radioactive substance 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, so that the radioactive waste is integrated. And can be processed continuously.

  Further, this radioactive waste treatment system includes two contaminated water storage tanks 21 and 22 for storing contaminated water and a fresh water storage tank 6 for storing fresh water not containing radioactive substances. As for cleaning, clean water can be used for cleaning, contaminated water is used as cleaning water in a proper place, and the cleaned water is used again as kneaded water, so that radioactive waste is treated in an integrated and continuous manner. Is excellent in

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

  Moreover, according to this radioactive waste processing system, the placement device 30 has the kneaded material supply devices 11A and 11B and the placement tubes 14a and 14b for filling the container 40f in the mold 40 with the kneaded material. Since at least two systems of redundant structures are provided, in the unlikely event that an unexpected situation occurs in which one of the kneaded product supply devices 11A, 11B or the placement tubes 14a, 14b cannot supply the kneaded product, In addition, the kneaded material can be continuously supplied from the kneaded material supply devices 11A and 11B and the placing tubes 14b and 14a of other systems. Therefore, it is excellent in preventing or suppressing a system stop for an unexpected situation.

As described above, according to this radioactive waste processing system, radioactive waste including contaminated water and incinerated ash can be integratedly processed. In addition, the radioactive waste processing system which concerns on this invention is not limited to the said embodiment, Of course, a various deformation | transformation is possible if it does not deviate from the meaning of this invention.
For example, in the above-described embodiment, an example in which waste containing radioactive materials is incinerated and reduced in volume is used as the incinerated ash, but the present invention is not limited to this, and in the treatment of contaminated water, a kneaded product When generating the ash, incinerated ash obtained by incineration of waste containing no radioactive material may be used. However, when processing radioactive waste in an integrated manner, as shown in the above embodiment, in addition to using contaminated water containing radioactive material, use incinerated ash that has been reduced in volume by incinerating waste containing radioactive material. It is preferable to treat radioactive waste in an integrated manner.

DESCRIPTION OF SYMBOLS 1 Kneading machine 2 Cement milk measuring tank 3 Incinerated ash measuring tank 4 Kneaded substance storage tank 5 Cement storage tank 6 Fresh water storage tank 7 Cement milk plant 8 Cement silo 9 Pressure blower 10 Incinerated ash storage tank 11A, 11B Kneaded substance supply apparatus 12a, 12b Kneaded product supply pumps 13a and 13b Supply pipes 14a and 14b Placing pipe 21 First storage tank (contaminated water storage tank)
22 Second storage tank (contaminated water storage tank)
23, 24 Piping 25 Recirculation pump 26 Three branch piping 26A, 26B, 26C Branch piping 27A, 27B, 27C Electromagnetic valve 29 Driving motor 30 Placing device 31 Post 32 Support frame 33 Horizontal frame 34 Placing tube support frame 35 Driving motor 36 Vibrator support frame 37 Vibrator 40 Mold 40f Flexible container (flexible container)
50 lateral movement device 60 dripping prevention pan 61 drive cylinder 62 support leg

Claims (6)

  Cement milk is produced using contaminated water containing radioactive material as kneaded water, and the kneaded product is produced by kneading the cement milk and incinerated ash reduced in volume by incineration of waste containing radioactive material. A method for treating radioactive waste, comprising filling a container in a mold into a solidified body.   The method for treating radioactive waste according to claim 1, wherein contaminated water containing a radioactive substance is used as washing water for equipment used for the treatment, and the washed contaminated water is used as the kneaded water.   Cement milk production facility for producing cement milk using contaminated water containing radioactive material as kneaded water, and incinerated ash reduced by incineration of waste containing cement milk and radioactive material produced in the cement milk production facility Kneading equipment for producing a kneaded product by kneading, a kneaded product storage tank for storing the kneaded product generated in the kneading equipment while stirring, and a kneaded product stored in the kneaded product storage tank A radioactive waste treatment system, comprising: a placing facility for filling the 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 not containing radioactive substances,
The fresh water storage tank is provided so that fresh water can be supplied only for the production of the cement milk in the cement milk production equipment and for the washing of the kneading equipment,
Of the plurality of contaminated water storage tanks, the first storage tank is provided so as to supply contaminated water to the cement milk generation facility,
Of the plurality of contaminated water storage tanks, a second storage tank is disposed so as to be movable to a filling position below the placement equipment by a moving equipment of the mold attached to the placement equipment, and is washed. Sometimes the contaminated water supplied to the placing equipment through the kneaded material storage tank is stored, and the contaminated water is used for cleaning the cement milk measuring tank of the cement milk generating equipment from the first storage tank. The radioactive waste processing system of Claim 3 provided so that supply is possible.   The cement milk production facility is provided so that cement milk can be produced using fresh water from the fresh water storage tank as kneaded water only when contaminated water from the first storage tank cannot be supplied. Item 5. A radioactive waste disposal system according to item 4.   6. The apparatus according to claim 3, wherein the placement facility includes at least two systems of redundant structures each having a kneaded product supply device and a placement pipe for filling the kneaded product in a container in a mold. The radioactive waste treatment system described.

Images