JP2017211341A - Installation device for radioactive waste treatment, solidified body installation method using the same, and radioactive waste treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation device for radioactive waste treatment capable of performing efficiently a solidified body treatment of radioactive waste.SOLUTION: An installation device 30 includes a support frame 32 arranged on the upper side of a formwork 40, and liftable in the facing direction to an opening on an upper part of the formwork, installation pipes 14a, 14b arranged in the state where each own axis is arranged vertically to the support frame 32, and liftable independently to the support frame 32, and a plurality of vibrators 37 arranged on the support frame 32 so as to enclose the installation pipes 14a, 14b, and liftable together with the support frame 32.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a placement device that can be suitably used for the treatment of radioactive waste, a solidified body placement method using the placement device, and a radioactive waste treatment 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, Patent Document 1 discloses an incineration ash treatment technique in which radioactive waste is incinerated ash (hereinafter simply referred to as “incinerated ash”) reduced in volume by incineration, and the incinerated ash is solidified with cement or the like. Yes.

JP 2013-234881 A

However, the technique described in Patent Document 1 does not disclose a placing device for treating a solidified body, a treatment process thereof, and a treatment system when solidifying the incinerated ash with cement or the like, and the radioactive waste is not disclosed. There is still room for examination in order to efficiently process the solidified material.
Therefore, the present invention has been made paying attention to such problems, and is a radioactive waste treatment placement apparatus capable of efficiently performing a solidified treatment of a radioactive waste, and a solidified product strike using the same. It is an object to provide an installation method and a radioactive waste treatment system.

  In order to solve the above-described problems, a radioactive waste disposal device according to one aspect of the present invention fills a container in a mold with a kneaded mixture of cement milk and incinerated ash containing a radioactive substance. And a support frame disposed above the mold and provided so as to be movable up and down in an opposite direction to the opening at the upper part of the mold, and an axis of the support frame. A placement tube that is arranged vertically and can be raised and lowered along with the raising and lowering of the support frame and can be raised and lowered independently with respect to the support frame, and the support frame that is disposed on the support frame so as to surround the placement tube And a plurality of vibrators provided so as to be able to be raised and lowered together with the raising and lowering of the frame.

  According to the radioactive waste disposal device according to one aspect of the present invention, the support frame is placed in a standby state positioned at an initial position above the mold, and the mold containing the container not filled with the kneaded material is predetermined. The support frame, the placing pipe and the plurality of vibrators are lowered to the lowest lowered position, and then supply of the kneaded material from the placing pipe is started and vibrations of the plurality of vibrators are started. The top surface height of the kneaded material is monitored, and as the kneaded material is filled, the support frame, the placing tube and the plurality of vibrators are gradually raised so that the kneaded material reaches the upper surface height corresponding to a predetermined filling amount. The supply of the kneaded material from the placement tube is stopped, and the placement tube is raised to a position separated from the upper surface of the filled kneaded material, and vibrations of a plurality of vibrators are vibrated until a predetermined time elapses. Continue and after a predetermined time The vibration causes to raise the plurality of vibrators to a position spaced from the upper surface of the kneaded material was stopped, then, it can be returned to the standby state to raise the support frame to an initial position above the mold. Therefore, if the radioactive waste disposal device according to one embodiment of the present invention is used, the radioactive waste can be efficiently solidified.

  Here, in the radioactive waste disposal device according to an aspect of the present invention, the radioactive waste disposal device is provided so as to be slidable in the horizontal direction below the support frame, and vertically with respect to the placement tube and the plurality of vibrators. It is preferable to further include a dripping prevention pan that is movable between a facing position facing each other and a retracted position retracted to the side. With such a configuration, the dripping prevention pan can prevent or suppress dripping of the kneaded material including the radioactive waste from the placing tube of the placing device and the plurality of vibrators. Therefore, it is suitable for performing the solidified treatment of the radioactive waste more safely and efficiently.

  Further, in the radioactive waste disposal device according to one aspect of the present invention, a filling amount detection sensor for detecting an upper surface height of a kneaded material provided in the support frame and filled in a container in the mold frame; Based on the upper surface height information of the kneaded material detected by the filling amount detection sensor, the support frame ascending / descending operation that integrates the plurality of vibrators and the placing tube, and the independent raising / lowering operation of the placing tube. And a controller for controlling the supply operation of the kneaded product, the vibration operation of the plurality of vibrators, and the slide movement operation of the dripping prevention pan. With such a configuration, the placement device can be automatically controlled, which is more suitable for performing the solidified treatment of radioactive waste more safely and efficiently.

  Furthermore, in the radioactive waste disposal device according to one aspect of the present invention, the control device retracts the dripping prevention pan from a standby state in which the support frame is located at an initial position above the mold. A placing preparation process for moving to a position; a support frame lowering process for integrally lowering the support frame, the placing pipe, and the plurality of vibrators to a lowest lowered position in the mold; and Based on the kneaded material supply process for starting the supply of the kneaded material and starting the vibration of the plurality of vibrators, and the upper surface height information of the kneaded material, the support frame, the placing tube, and the plurality of vibrators are provided. When the filling amount monitoring process to gradually increase and the upper surface height information corresponding to the predetermined filling amount of the kneaded material is acquired, the supply of the kneaded material from the placing tube is stopped, and the filled The kneaded product supply stop process that continues to vibrate the plurality of vibrators until the predetermined time elapses, and after the predetermined time has elapsed, A vibrator stop process for raising the plurality of vibrators together with the support frame to a position separated from an upper surface of the kneaded material and stopping vibrations; and the support frame, the placing tube, and the plurality of vibrators are disposed above the mold frame. A solidified body placing process including a support frame raising process for raising the support body integrally to an initial position and a standby process for moving the dripping prevention pan to the opposing position and returning to a standby state is performed in the order described above. It is preferable that With such a configuration, the entire operation of the placing apparatus can be executed by automatic control. Therefore, it is much more suitable for performing the solidified treatment of radioactive waste more safely and efficiently.

  Further, in order to solve the above-described problem, a solid waste casting method for treating radioactive waste according to one aspect of the present invention includes a kneaded product obtained by kneading cement milk and incinerated ash containing a radioactive substance in a mold. A solidified body placing method for filling a container to form a solidified body, wherein the support frame is an initial position above the mold using the radioactive waste disposal apparatus according to any one aspect of the present invention. In the standby state located at the position, the mold with the kneaded material not filled is positioned at a predetermined filling position, and then the dripping prevention pan is moved to the retracted position (however, the dripping prevention pan is And when the support frame, the placement tube and the plurality of vibrators are lowered to the lowest lowered position, and then the supply of the kneaded material from the placement tube is started, Start vibration of the plurality of vibrators The height of the upper surface of the kneaded material is monitored, and as the kneaded material is filled, the support frame, the placing tube and the plurality of vibrators are gradually raised, and the kneaded material corresponds to a predetermined filling amount. When the upper surface height is reached, the supply of the kneaded material from the casting tube is stopped, and the casting tube is raised to a position separated from the top surface of the filled kneaded material, and a predetermined time has elapsed. The vibrations of the plurality of vibrators are continued until a predetermined time elapses, the vibrations are raised to a position separated from the upper surface of the kneaded product, and the vibrations are stopped, and then the support frame is moved to the mold. It is raised to the initial position above the frame, and then the dripping prevention pan is moved to the opposite position (only when the dripping prevention pan is equipped) to return to the standby state. The features.

  According to the solidified waste placement method for radioactive waste treatment according to one aspect of the present invention, since the radioactive waste treatment placement apparatus according to any one aspect of the present invention is used, as described above, The solidified treatment of radioactive waste can be performed efficiently.

  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 A radioactive waste treatment system comprising: a kneaded material storage tank stored while the kneaded material stored in the kneaded material storage tank is filled into a container in a mold to form a solidified body; As the placement device, the radioactive waste treatment placement device according to any one aspect of the present invention is provided.

  According to the radioactive waste treatment system according to one aspect of the present invention, since the radioactive waste disposal device according to any one aspect of the present invention is provided, as described above, solidification of the radioactive waste Body treatment can be performed efficiently.

  As described above, according to the present invention, the solidified material treatment of radioactive waste can be performed efficiently.

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 a cement kneaded using contaminated water and incinerated ash into a solidified body filled in a container in a mold and molded. It is.
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. The fresh water storage tank 6 is connected to a pipe (not shown) capable of storing clean water (for example, tap water) 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. The mold 40 according to the present embodiment is formed in a box shape having a substantially cubic shape opened at the top, and is used by accommodating a flexible container, which is a flexible container, inside the top opening. In addition, as long as the formwork 40 can support the form of the flexible container accommodated inside and can make a kneaded material into the solidified body of a desired shape, a structure and material will not be limited.

  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.

  In the support frame 32, the above-mentioned casting pipes 14a and 14b are provided perpendicular to the axis at the tip of the central casting pipe support frame 34. A vertical slide mechanism including a drive motor 35 having a speed reduction mechanism is provided on the placement pipe support frame 34, and the height of the placement pipes 14a and 14b is shown by a solid line in FIG. The placing pipes 14a and 14b can be moved up and down independently at an arbitrary position between a lowered position indicated by (2) and an elevated position (not shown).

  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, the support leg 62 is disposed at the placement position of the mold 40, and a dripping prevention pan 60 that is slidable in the horizontal direction is supported on the upper part of the support leg 62. 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 the support frame 32 is in the raised position. It is lower than the lower ends of the placement tubes 14a and 14b and the plurality of vibrators 37 so as not to interfere with the placement tubes 14a and 14b and the plurality of vibrators 37 at the time of (the position of the two-dot chain line in FIG. In the position.

  The dripping prevention pan 60 is provided so as to be slidable in the horizontal direction by a drive cylinder 61 whose axis is horizontally disposed on the upper portion of the support leg 62. The dripping prevention pan 60 is driven by the drive cylinder 61 so as to oppose the placement tubes 14a and 14b supported by the support frame 32 and the plurality of vibrators 37 in the vertical direction, and the placement tubes 14a and 14b and the plurality of placement tubes 14a and 14b. It is possible to move to the retracted position retracted to the side of the vibrator 37.

  In addition, the whole radioactive waste processing system including the above-described placing device 30 can perform the solidified body placing process 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 in a safe place.

  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, the solidified body placing process by the radioactive waste treatment system will be described.
In this radioactive waste processing system, the solidified body placing process is executed by automatic control by a control device that manages the entire system. When the solidified body placing processing program is executed, the cement milk plant 7 receives the supply of contaminated water containing radioactive substances from the first storage tank 21 and the supply of cement from the cement storage tank 5, Cement milk is produced using the contaminated water supplied from the first storage 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 out 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 and uses the kneading machine 1 which is a kneading facility. The cement milk and the incinerated ash are kneaded at a predetermined ratio to produce 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 suspend and support the square sheet, and a loop portion of the suspension belt. The whole bag can be suspended and supported by 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 liquid dripping prevention pan 60 of the placement device 30 in the horizontal direction and moves to the retreat position as placement preparation processing. Thereafter, the control device lowers the entire support frame 32 from above the mold 40 to the filling height in the mold 40 as a support frame lowering process.

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 as the kneaded material supply process and also vibrates the plurality of vibrators 37. To start. 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, the control device executes the filling amount monitoring process, and in order to prevent the kneaded material from scattering, the control device performs filling with the tips of the placing tubes 14a and 14b inserted into the container 40f, and opens the container 40f. The height of the support frame 32 is controlled so as to cover the portion and the periphery thereof with a surface such as the vibrator support frame 36.

  In the filling amount monitoring process, as shown in FIG. 5B, the control device places the pipes 14a and 14b according to the filling amount of the kneaded material while maintaining the tips embedded in the kneaded material. The height is controlled so that the tubes 14a and 14b and the vibrators 37 are raised. 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 continues the filling amount monitoring process, and while filling and supplying the kneaded material into the container 40f, the control unit vibrates and compacts the kneaded material with a plurality of vibrators 37 arranged around the placing tubes 14a and 14b. I do. 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 as the kneaded material supply stop process, and as shown in FIG. , 14b is raised, and the tips of the placement tubes 14a, 14b are pulled out to the 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.

  In the kneaded product supply stop process, the control device continues the vibration for a predetermined time until the top surface of the kneaded material in the container 40f becomes substantially horizontal by the plurality of vibrators 37 around the placing tubes 14a and 14b. As the entire frame 32 rises, each vibrator 37 is gradually pulled out above the mold 40. In the drawing, 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 stops each vibrator 37 in the vibrator stop process and positions the entire support frame 32 at a further separated position. Next, the control device integrally raises the support frame 32, the placement tubes 14a and 14b, and the plurality of vibrators 37 to the initial position above the mold 40 as the support frame raising process. After separating each vibrator 37 from the kneaded material in the container 40f and raising the entire support frame 32 to the initial position, the control device horizontally moves the dripping prevention pan 60 to the lower part of the support frame 32 as a standby process. The dripping prevention pan 60 sets the standby state to prevent the kneaded material from splashing and dripping from the placing tubes 14a and 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 body placing process 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.

  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. Is circulated to the cement milk measuring tank 2 through the branch 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. And since the wash water with which the 2nd storage tank 22 was filled is supplied again to the cement milk plant 7 from the 1st storage tank 21 after washing | cleaning, the contaminated water after the washing | cleaning is used as kneading water. be able to.

Next, the operation and effect of the placement device 30 and the radioactive waste treatment system including the placement device 30 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.

  Then, according to the placement device 30, the control device executes the solidified body placement processing program to place the support frame 32 in a standby state positioned at the initial position above the mold 40, and the kneaded material is not filled. After the mold 40 containing the container 40f in the state is located at a predetermined filling position, the support frame 32, the placing pipes 14a and 14b and the plurality of vibrators 37 are lowered to the lowest lowered position, and then the placing pipe 14a. , 14b to the container 40f, and the vibration of the vibrators 37 is started, and the height of the upper surface of the kneaded material is monitored. The installation pipes 14a and 14b and the plurality of vibrators 37 are gradually raised, and supply of the kneaded material from the installation pipes 14a and 14b is stopped when the kneaded product reaches the upper surface height corresponding to a predetermined filling amount. In both cases, the casting tubes 14a and 14b are raised to a position separated from the upper surface of the filled kneaded material, and the vibration of the vibrators 37 is continued until a predetermined time elapses. The plurality of vibrators 37 can be raised to a position separated from the upper surface and the vibration can be stopped, and then the support frame 32 can be raised to the initial position above the mold 40 to return to the standby state. Therefore, if the placement apparatus 30 of this embodiment is used, the solidified material processing of radioactive waste can be performed efficiently.

  Further, according to the driving device 30, the support frame 32 is provided so as to be slidable in the horizontal direction below the support frame 32 and at a position where it does not interfere with the driving tubes 14 a and 14 b and the plurality of vibrators 37. Since this liquid is further provided with a liquid dripping prevention pan 60 that can be moved to an opposing position in the up-down direction with respect to the placed tubes 14a, 14b and the plurality of vibrators 37 and a retracted position retracted sideways. The drooling prevention pan 60 can prevent or suppress dripping of the kneaded material containing radioactive waste from the casting tubes 14a and 14b of the casting device 30 and the plurality of vibrators 37. Therefore, it is suitable for performing the solidified treatment of the radioactive waste more safely and efficiently.

  Further, according to the driving device 30, the filling amount detection sensor that detects the upper surface height of the kneaded material that is provided in the support frame 32 and is filled in the container 40f in the mold 40, and the filling amount detection sensor detect it. Based on the height information of the kneaded material, the raising / lowering operation of the support frame 32 integrating the vibrator 37 and the placing tubes 14a, 14b, the independent raising / lowering operation of the placing tubes 14a, 14b, and the supply of the kneaded material And a control device that controls the vibration operation of the plurality of vibrators 37 and the sliding movement of the dripping prevention pan 60, so that the automatic control of the placing device 30 can be performed with high accuracy by feedback control. It is excellent in performing the solidified material treatment more safely and efficiently.

As described above, according to the radioactive waste treatment system including the placement device 30, the radioactive waste is solidified efficiently and the radioactive waste including contaminated water and incinerated ash is integrated. Can be processed.
In addition, the radioactive waste disposal device according to the present invention, the solidified material placement method using the same, and the radioactive waste disposal system are not limited to the above-described embodiment, but the gist of the present invention. Of course, various modifications are possible without departing.
For example, in the above-described embodiment, an example has been described in which the control device executes the solidified body placing processing program and performs the entire operation of the placing device by automatic control. The operator may operate by manually operating the placing device 30 from the operation room provided at the place. However, in order to perform the solidified material treatment of the radioactive waste more safely and efficiently, it is preferable to perform the solidified material placing processing unattended by automatic control by a control device including a computer.

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)

A casting device in which a kneaded product obtained by kneading cement milk and incinerated ash containing a radioactive substance is filled into a container in a mold to form a solidified body,
A support frame disposed above the mold and provided so as to be movable up and down in a direction opposite to the opening at the top of the mold;
A placement tube that is arranged vertically on the support frame and can be moved up and down with the support frame and can be moved up and down independently of the support frame;
A plurality of vibrators disposed on the support frame so as to surround the placement tube and capable of being lifted and lowered together with the lifting and lowering of the support frame;
A radioactive waste disposal device characterized by comprising:   A liquid dripping is provided below the support frame so as to be slidable in the horizontal direction, and is movable between a facing position facing the placing tube and the vibrators in the vertical direction and a retreat position retracted sideways. The radioactive waste disposal device according to claim 1, further comprising a prevention pan. A filling amount detection sensor for detecting the upper surface height of the kneaded material provided in the support frame and filled in the container in the mold;
Based on the upper surface height information of the kneaded material detected by the filling amount detection sensor, the lifting and lowering operation of the support frame integrally including the plurality of vibrators and the driving tube, and the single lifting and lowering operation of the driving tube and The radioactive waste according to claim 2, further comprising: a control device that controls a supply operation of the kneaded material, a vibration operation of the plurality of vibrators, and a slide movement operation of the dripping prevention pan. Installation device for material processing. The control device, from a standby state in which the support frame is located at the initial position above the mold, from the standby preparation process to move the dripping prevention pan to the retracted position,
A support frame lowering process in which the support frame, the placing tube, and the plurality of vibrators are integrally lowered to the lowest lowered position in the mold,
While starting the supply of the kneaded material from the placing tube, kneaded material supply processing for starting the vibration of the plurality of vibrators,
A filling amount monitoring process for gradually raising the support frame, the placing tube, and the plurality of vibrators based on the upper surface height information of the kneaded material,
When the upper surface height information corresponding to the predetermined filling amount of the kneaded material is acquired, the supply of the kneaded material from the placing tube is stopped and the position separated from the upper surface of the filled kneaded material Kneading material supply stop processing that raises only the placing tube, and further continues vibration of the vibrators until a predetermined time elapses,
After the predetermined time has elapsed, a vibrator stop process for raising the plurality of vibrators together with the support frame to a position separated from the upper surface of the kneaded product and stopping vibrations;
A support frame raising process for integrally raising the support frame, the placing tube, and the plurality of vibrators to an initial position above the mold;
A standby process for moving the dripping prevention pan to the opposite position and returning to a standby state;
The radioactive waste treatment placement apparatus according to claim 3, wherein the solidified body placement processing including the above is executed in the order described above. A kneaded product obtained by kneading cement milk and incinerated ash containing a radioactive substance is filled in a container in a mold to form a solidified body,
Using the radioactive waste disposal device according to any one of claims 2 to 4,
The support frame is in a standby state positioned at an initial position above the mold,
After the mold that is not filled with the kneaded material is positioned at a predetermined filling position, the dripping prevention pan is moved to the retracted position, and then the support frame, the placing tube, and the plurality of vibrators And then starting the supply of the kneaded material from the placing tube, and starting the vibration of the plurality of vibrators,
By monitoring the upper surface height of the kneaded material, as the kneaded material is filled, the support frame, the placing tube and the plurality of vibrators are gradually raised,
When the kneaded product reaches the upper surface height corresponding to a predetermined filling amount, the supply of the kneaded product from the placing tube is stopped, and the position is separated from the top surface of the filled kneaded product. The placing tube is raised, and the vibrations of the plurality of vibrators are continued until a predetermined time elapses. After the predetermined time elapses, the vibrators are raised to a position separated from the upper surface of the kneaded material and vibrations are generated. Stopping, then raising the support frame to an initial position above the mold, and then moving the dripping prevention pan to the opposite position to return to the standby state Solidified body casting method. Cement milk generating equipment for producing cement milk using contaminated water containing radioactive substances as kneaded water, and incinerated ash reduced by incineration of waste containing cement milk and radioactive substances produced in the cement milk generating equipment 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 placement device that fills and solidifies an inner container,
A radioactive waste treatment system comprising the placement device according to any one of claims 1 to 4 as the placement device.

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