JP2011237320A - Apparatus for transferring radioactive sludge - Google Patents

Abstract

Provided is a radioactive sludge transfer device for safely and reliably transferring radioactive sludge stored in a sludge storage tank and contaminated with radioactive substances to another tank for tank inspection or the like.
SOLUTION: A stirrer 3 for spraying supernatant water 2 in a tank T1 onto sludge 1 to form a sludge liquid 4, sludge liquid transfer means 5 for transferring the sludge liquid 4 to a transfer tank T2, and formation in a transfer tank T2. Sludge pulverizing means 6 for blowing and pulverizing the supernatant water 2 applied to the sludge 1 stored in the sludge storage tank T1, and control means for remotely controlling the operations of the agitator 3, the sludge liquid transfer means 5 and the sludge pulverizing means 6. Prepare.
[Selection] Figure 1

Description

  The present invention relates to a radioactive sludge transfer device, and more particularly, a radioactive sludge stored in a sludge storage tank and safely transferred to another tank for a tank inspection or the like for safe and reliable transfer of radioactive sludge. The present invention relates to a sludge transfer device.

  Radioactive sludge contaminated with radioactive materials (hereinafter simply referred to as sludge), which consists of ion exchange resins and filter aids generated during the operation of nuclear power plants, is clarified for a certain period of time due to radioactive attenuation. It is stored together with water in a sludge storage tank, and then extracted from the sludge storage tank and transferred to a processing step for processing.

  Supernatant water is generated for the following reasons. When the sludge is transferred to the sludge storage tank, since it is impossible to transfer the sludge alone, it is necessary to mix it with water or the like to obtain a fluidized sludge liquid. When the sludge liquid thus formed is conveyed to a sludge storage tank, the sludge settles and supernatant water is generated on the sludge.

  Since such a sludge storage tank is required to have high reliability, it is necessary to periodically inspect and repair the sludge storage tank as necessary. In order to check the tank, it is necessary to empty the sludge storage tank. For this purpose, it is necessary to transfer the sludge stored in the sludge storage tank to another tank, and it is essential to carry out this transfer operation while minimizing the exposure of the worker to radiation.

  An example of a radioactive sludge transfer device proposed to solve this problem is disclosed in Patent Document 1 (Japanese Patent No. 4356728). Hereinafter, this radioactive sludge transfer device is referred to as a conventional transfer device and will be described with reference to the drawings.

  FIG. 9 is a schematic configuration diagram illustrating a conventional transfer device.

  In FIG. 9, T1 is a sludge storage tank in which the sludge 31 is stored, T2 is a transfer tank to which the sludge 31 stored in the sludge storage tank T1 is transferred, 32 is the supernatant water of the sludge 31, and 33 is air. It is a blowing device, and includes an air supply source 34, an air pipe 35 and an air nozzle 36. The air blowing device 33 blows air into the supernatant water 32 of the sludge 31 stored in the sludge storage tank T1, and locally agitate the supernatant water 32, thereby forming a sludge liquid 37 having fluidity.

  P1 is a sludge transfer pump in the sludge storage tank T1, P2 is a supernatant water return pump in the transfer tank T2, 38 is a sludge liquid transfer path that is connected to the sludge transfer pump P1 and reaches the transfer tank T2, and 39 A supernatant water transfer path 40 connected to the supernatant water return pump P2 is a supernatant water jetting apparatus connected to the supernatant water transfer path 39. The supernatant water ejection device 40 converts the supernatant water 32 from the supernatant water transfer path 39 as a high-pressure water jet from the supernatant water ejection nozzle 42 attached to the supernatant water pipe 41 toward the sludge 31 stored in the sludge storage tank T1. Spray.

  The air pipe 35, the sludge liquid transfer path 38, the supernatant water transfer path 39 and the supernatant water pipe 41 are all inserted into the sludge storage tank T1 or the transfer tank T2 from the inspection hole 43 shielded by the radiation shielding means 44. Yes.

  45 is a monitoring camera installed in the sludge storage tank T1, and monitors the formation state of the sludge liquid 37 in the sludge storage tank T1. A monitoring camera 46 is installed in the transfer tank T2, and monitors the formation state of the supernatant water 32 in the transfer tank T2. 47 is a control device based on the video information from the monitoring cameras 45 and 46, and the valve B1 attached to the air blowing device 33, the supernatant water jetting device 40, the sludge liquid transfer path 38 and the supernatant water transfer path 39. A series of operations for transferring the sludge 31 is controlled by operating B4 and the like.

  According to the conventional transfer apparatus configured as described above, the sludge 1 stored in the sludge storage tank T1 is transferred into the transfer tank T2 as follows.

  First, air is blown into the supernatant water in the sludge storage tank T1 by the air blowing device 33, and the supernatant water is locally stirred. Thereby, the sludge 31 stored in the sludge storage tank T <b> 1 is pulverized, and a sludge liquid 37 having fluidity is formed on the sludge 31.

  When the sludge liquid 37 is thus formed, the sludge liquid 37 is sucked by the sludge transfer pump P1 and transferred to the transfer tank T2 through the sludge liquid transfer path 38. The sludge liquid 37 in the transfer tank T2 is separated into the sludge 31 and the supernatant water 32 over time.

  In this way, when the supernatant water 32 is accumulated in the transfer tank T2, the supernatant water 32 is sucked by the supernatant water return pump P2 and transferred to the supernatant water jetting device 40 through the supernatant water transfer path 39. The supernatant water ejection device 40 sprays the supernatant water 32 through the supernatant water pipe 41 from the supernatant water ejection nozzle 42 to the sludge 31 stored in the sludge storage tank T1. As a result, the sludge 31 is pulverized to form a sludge liquid 37.

  Thereafter, the sludge liquid 37 is again sucked by the sludge transfer pump P1 and transferred to the transfer tank T2 through the sludge liquid transfer path 38, and the supernatant water 32 in the transfer tank T2 is stored in the sludge storage tank T1. 31 is sprayed.

  By repeating the above operation, the sludge 31 stored in the sludge storage tank T1 can be transferred into the transfer tank T2.

Japanese Patent No. 4356728

As described above, the conventional transfer apparatus provides the following advantages.
(1) Since a series of operations for transferring the sludge 31 is performed by remote control by the control device 47 based on video information from the monitoring cameras 45 and 46, it is possible to minimize exposure of workers due to radiation. it can.
(2) When the sludge 31 is pulverized by the high-pressure water jet, the sludge 31 can be reliably pulverized. The first pulverization of the sludge 31 is performed by blowing air.
(3) Since the supernatant water 32 originally stored in the sludge storage tank T1 is used as the high-pressure water used for pulverizing the sludge 31, the amount of radioactive waste does not increase. When water from the outside is used, the amount of radioactive waste increases accordingly.

However, the conventional transfer device has the following problems.
(A) The first pulverization of the sludge 31 is performed by blowing air into the supernatant water in the sludge storage tank T1 by the air blowing device 33 and locally stirring the supernatant water. It is difficult to grind and takes time to grind.
(B) After the sludge 31 is pulverized by blowing air, the sludge 31 is pulverized by blowing the supernatant water 32 onto the sludge 31. However, the pulverization efficiency of the sludge 31 is poor only by blowing the supernatant water 32, and the sludge 31 It takes time to transfer.

  Accordingly, the object of the present invention is to minimize the exposure of workers to radiation and to transfer the radioactive waste without increasing the amount of radioactive waste. And it is providing the sludge transfer apparatus which can grind | pulverize reliably and, as a result, can transfer sludge in a short time.

  The present invention has been made to achieve the above object, and is characterized by the following.

  [1] In a radioactive sludge transfer device that transfers sludge stored in one tank together with supernatant water to the other tank, sludge is sprayed on the sludge stored in the one tank by spraying the supernatant water in the one tank. A stirrer for forming a liquid, a sludge liquid transfer means for transferring the sludge liquid in the one tank to the other tank, and a supernatant water formed by sedimentation of the sludge in the sludge liquid in the other tank. A sludge crushing means for blowing the sludge stored in the one tank and crushing the sludge; and a control means for remotely controlling the operation of the stirrer, the sludge liquid transfer means and the sludge crushing means, and The transfer means sucks the sludge liquid in the one tank and transfers it to the other tank. The sludge crushing means is stored in the one tank with the supernatant water suction pump for sucking the supernatant water in the other tank, and the supernatant water sucked by the supernatant water suction pump. A supernatant water spray nozzle for spraying on the sludge, the stirrer can freely move in the supernatant water in the one tank, and the nozzle position of the supernatant water spray nozzle can be freely adjusted It has characteristics.

  [2] In the radioactive sludge transfer device according to [1], the stirrer blows air and supernatant water in the one tank to form sludge liquid on the sludge stored in the one tank. It is what has.

  [3] In the radioactive sludge transfer device according to [1] or [2], the stirrer includes a stirrer body, a float that imparts buoyancy to the stirrer body, a ballast tank that adjusts the buoyancy of the stirrer body, A suction pump for a stirrer that sucks the supernatant water in one tank and a spray nozzle that sprays the supernatant water sucked by the suction pump for the stirrer, and the supernatant water spray angle of the spray nozzle can be freely adjusted It is characterized by being.

According to the present invention, the following effects are brought about.
(1) Since everything from sludge crushing to transfer can be performed by remote control, exposure to radiation by workers can be minimized.
(2) Since the supernatant water is recycled, the amount of radioactive waste does not increase.
(3) Since the sludge is pulverized by spraying the supernatant water from the first stage by the stirrer, the sludge can be pulverized reliably in a short time, and as a result, the sludge can be transferred in a short time.
(4) Since the agitator can freely move in the supernatant water in the sludge storage tank, it is possible to reliably and efficiently pulverize the sludge at any location stored in the sludge storage tank. The sludge can be transferred in a short time.
(5) By adjusting the jet nozzle of the stirrer, the sludge liquid can be selectively flowed to the sludge liquid suction pump side, so that the sludge liquid can be efficiently sucked without changing the position of the sludge liquid suction pump. Can do.

It is a schematic block diagram which shows the state which is transferring the sludge liquid in the sludge storage tank T1 to the transfer tank T2 by the radioactive sludge transfer apparatus of this invention. It is a schematic block diagram which shows the state which sprays the supernatant liquid in transfer tank T2 on the sludge in sludge storage tank T1 by the radioactive sludge transfer apparatus of this invention, and is grind | pulverizing sludge. It is a schematic perspective view which shows the stirrer in the sludge transfer apparatus of this invention. It is a general | schematic disassembled perspective view which shows the stirrer in the sludge transfer apparatus of this invention. It is a schematic front view which shows the float of the stirrer in the sludge transfer apparatus of this invention. It is a front view showing the vertically moving state of the stirrer in the sludge transfer device of the present invention, (a) is a diagram showing the state of diving start, (b) is a diagram showing the state of diving, (c), The figure which shows the state after a dive, (d) is a figure which shows the grinding | pulverization state of sludge, (e) is a figure which shows the state of a floating start, (f) is a figure which shows the state after floating. It is a front view which shows the horizontal movement state of the stirrer in the sludge transfer apparatus of this invention, (a) is a figure which shows a forward movement state, (b) is a figure which shows a left turn state, (c) is a right turn The figure which shows a state, (d) is a figure which shows a reverse state. It is a front view which shows the state which is making sludge liquid flow in the sludge liquid suction pump direction with the stirrer in the radioactive sludge transfer apparatus of this invention. It is a schematic block diagram which shows a conventional transfer apparatus.

  An embodiment of the radioactive sludge transfer device of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing a state in which the sludge liquid in the sludge storage tank T1 is transferred to the transfer tank T2 by the radioactive sludge transfer device of the present invention, and FIG. 2 is a transfer tank by the radioactive sludge transfer device of the present invention. It is a schematic block diagram which shows the state which sprays the supernatant liquid in T2 on the sludge in sludge storage tank T1, and grind | pulverizes sludge.

  In FIG. 1 and FIG. 2, T1 is a sludge storage tank to be inspected as one tank in which radioactive sludge (hereinafter simply referred to as sludge) 1 contaminated with radioactive material is stored, and T2 is sludge. The sludge 1 stored in the storage tank T1 is transferred. The transfer tank as the other tank, 2 is the supernatant water of the sludge 1, 3 is a stirrer, and the sludge is stored in the sludge storage tank T1. The sludge 1 is pulverized by spraying the supernatant water 2 in the storage tank T1 to form the sludge liquid 4. In addition, since the supernatant water 2 may contain the sludge 1, the supernatant water 2 containing the sludge 1 is also called the supernatant water 2 for convenience.

  As described above, the sludge 1 is made of an ion exchange resin, a filter aid, or the like that is generated during the operation of the nuclear power plant. The supernatant liquid 2 is generated for the reasons described above, and the sludge liquid 4 is separated from the sludge 1. It is formed by the supernatant liquid 2.

  5 is a sludge liquid transfer means, which transfers the sludge liquid 4 in the sludge storage tank T1 to the transfer tank T2. The sludge liquid transfer means 5 includes a sludge liquid suction pump 7 that sucks the sludge liquid 4 in the sludge storage tank T1 and transfers it to the transfer tank T2. The sludge liquid 4 in the sludge storage tank T1 sucked by the sludge liquid suction pump 7 is transferred to the transfer tank T2 through the pipe lines R1, R2, and R3. A valve B1 is provided between the pipe lines R1 and R2, and a valve B2 is provided between the pipe lines R2 and R3.

  6 is a sludge crushing means, and the supernatant water 2 formed by the sedimentation of the sludge 1 in the sludge liquid 4 in the transfer tank T2 is sprayed on the sludge 1 stored in the sludge storage tank T1 to crush the sludge 1. The sludge crushing means 6 sprays the supernatant water suction pump 8 for sucking the supernatant water 2 in the transfer tank T2 and the supernatant water 2 sucked by the supernatant water suction pump 8 onto the sludge 1 stored in the sludge storage tank T1. A supernatant water spray nozzle 9 for pulverization is provided.

  The nozzle position of the supernatant water spray nozzle 9 can be freely adjusted by the cylinder 20. The supernatant water 2 sucked by the supernatant water suction pump 8 is sprayed from the supernatant water spray nozzle 9 to the sludge 1 stored in the sludge storage tank T1 through the pipe lines R4, R2, and R5. A valve B3 is provided between the pipe lines R4 and R2, and a valve B4 is provided between the pipe lines R2 and R5.

  Reference numeral 10 denotes a cleaning means for cleaning the sludge 1 and the supernatant water 2 remaining in the pipes R1, R2, R3, R4, R5 with pure water. The pipe is washed after the sludge liquid 4 in the sludge storage tank T1 is transferred to the transfer tank T2, and after the supernatant water 2 in the transfer tank T2 is sprayed on the sludge 1 of the sludge storage tank T1. The reason for this is that, as the sludge 1 is, of course, the supernatant water 2 is also radioactive, there is a risk of radiation exposure other than during the transfer operation of the sludge 1 unless cleaning is performed.

  The cleaning means 10 includes a pure water tank 11 and an air tank 12, and the pure water in the pure water tank 11 is supplied to the pipe line R2 via valves B5 and B6. The air in the air tank 12 is supplied to the pipe line R2 via B7 and B8.

  The pipes R2 and R3 after the sludge liquid 4 in the sludge storage tank T1 is transferred to the transfer tank T2 are cleaned as follows. The pure water in the pure water tank 11 is passed through the pipes R2 and R3 through the valve B5, and then the air in the air tank 12 is passed through the pipes R2 and R3 through the valve B7.

  On the other hand, cleaning of the pipe lines R2 and R5 after the supernatant water 2 in the transfer tank T2 is sprayed on the sludge 1 of the sludge storage tank T1 is performed as follows. The pure water in the pure water tank 11 is passed through the pipes R2 and R5 through the valve B6, and then the air in the air tank 12 is passed through the pipes R2 and R5 through the valve B8.

  The amount of pure water used for cleaning the pipes R1, R2, R3, R4, and R5 is very small, and after passing pure water, residual water in the pipes is excluded by air. The road can be washed reliably with the minimum amount of water required. Furthermore, in order to ensure the reliability of the pipeline cleaning, a sight glass 22 (a part of the pipeline is made transparent so that the inside of the pipeline can be visually confirmed) and a radiometer (not shown) are provided on the pipeline. The dose in the pipe where the system is installed is monitored.

  Reference numeral 13 denotes a monitoring camera for photographing the situation in the sludge storage tank T1, and monitors the formation state of the sludge liquid 4 in the sludge storage tank T1, the position of the agitator 3, and the like. Reference numeral 14 denotes a monitoring camera that photographs the situation in the transfer tank T2, and monitors the formation state of the supernatant liquid 2 in the transfer tank T2.

  The operations of the agitator 3, the sludge liquid transfer means 5 and the sludge crushing means 6 are remotely controlled by a control means (not shown) based on video information from the monitoring cameras 13 and 14.

  In addition, an inspection hole (not shown) for insertion of the agitator 3, the sludge liquid suction pump 7 and the supernatant water spray nozzle 9 provided in the sludge storage tank T1, and a pipe line R3 provided in the transfer tank T2 and All the inspection holes (not shown) for insertion of the supernatant water suction pump 8 are shielded by radiation shielding means (not shown).

  Next, the stirrer 3 will be further described.

  As shown in FIGS. 3 to 5, the stirrer 3 includes a stirrer main body 15, a plurality of (in this example, eight) floats 16 that impart buoyancy to the stirrer main body 15, and an agitator by filling and discharging air. A ballast tank 17 for adjusting the buoyancy of the main body 15, a suction pump 18 for the stirrer that sucks the supernatant water 2 in the sludge storage tank T1, and a plurality of jets of the supernatant water 2 sucked by the suction pump 18 for the stirrer (this In this example, the number of nozzles 19 is four. The supernatant water 2 sucked by the agitator suction pump 18 is supplied to the spray nozzle 19 through the agitator body 15.

  One injection nozzle 19 is provided in the lower corner portion of the stirrer body 15 one by one downward. The spray nozzle 19 can be freely adjusted by a cylinder (not shown) in the range where the supernatant water spray angle is 360 °. The opening and closing of the spray nozzle 19 and the adjustment of the supernatant water spray angle can be individually remotely controlled by the control means. As shown in FIG. 5, the float 16A on the outer side of the float 16 can be raised and lowered by a hinge mechanism, and by bringing it down, the stirrer 3 can be carried from the narrow inspection hole of the sludge storage tank T1. Making it easy. The outer float 16A rises horizontally due to buoyancy in the supernatant water 2 in the sludge storage tank T1, and the horizontal stability of the stirrer body 15 is ensured.

  The air hose 21 is used to fill and discharge the air to and from the ballast tank 17, and the operations of the agitator suction pump 18 and the injection nozzle 19 are remotely operated by the control means.

  As shown in FIGS. 6A and 6B, the stirrer 3 dives into the supernatant water 2 of the sludge storage tank T1 by releasing the air in the ballast tank 17 and is shown in FIG. 6C. Thus, it reaches the sludge 1 surface stored in the sludge storage tank T1. Thereafter, as shown in FIG. 6 (d), the supernatant water 2 in the sludge storage tank T 1 is sucked by the agitator suction pump 18 and sprayed from the spray nozzle 19 toward the sludge 1. As a result, the sludge 1 is pulverized to form a sludge liquid 4. At this time, as shown in FIG. 8, if the spray nozzle 19 is directed toward the sludge liquid suction pump 7, the sludge liquid 4 flows toward the sludge liquid suction pump 7, so that the sludge liquid 4 is effectively sucked. As shown in FIGS. 6 (e) and 6 (f), the stirrer 3 rises and can be moved to another place by filling the ballast tank 17 with air.

  As shown in FIG. 1, the stirrer 3 moves in a state in which the bottom surface of the sludge 1 settles in the supernatant water 2 between the water surface of the supernatant water 2 and the top surface of the sludge 1 or the supernatant water 2. It is also possible to form the sludge liquid 4 while moving near the water surface.

  Moreover, if air is supplied to the stirrer 3 from the outside and air and the supernatant water 2 in the sludge storage tank T1 are simultaneously sprayed to the sludge 1, the sludge liquid 4 can be formed more efficiently. As described above, the position of the stirrer 3 is monitored by the monitoring camera 13, but the sludge liquid 4 is cloudy, and thus the position of the stirrer 3 may not be clearly grasped. However, if air and supernatant water 2 are sprayed simultaneously on the sludge 1, the position of the stirrer 3 can be clearly grasped by the bubbles generated by the air spray.

  As shown in FIG. 7A, the agitator 3 moves forward by jetting the supernatant water 2 from the pair of rear spray nozzles 19A, and as shown in FIG. 7B, the pair of rear spray nozzles 19A. 7 is rotated counterclockwise by jetting the supernatant water 2 only from one of the nozzles, and rotated clockwise by jetting the supernatant water 2 only from the other nozzle of the rear pair of jet nozzles 19A, as shown in FIG. As shown, it retreats by jetting the supernatant water 2 from a pair of front jet nozzles 19B.

  In this way, the agitator 3 can freely move in the sludge storage tank T1, and the sludge liquid 4 can flow to the sludge liquid suction pump 7 side at any position of the sludge liquid 4.

  According to the radioactive sludge transfer device of the present invention configured as described above, the sludge 1 stored in the sludge storage tank T1 is transferred into the transfer tank T2 as follows.

  First, as shown in FIG. 1, the stirrer 3 is carried into the sludge storage tank T <b> 1 and submerged in the supernatant water 2. Thereafter, the supernatant water 2 is sprayed from the spray nozzle 19 to the sludge 1 stored in the sludge storage tank T1, and thus the sludge 1 is pulverized to form the sludge liquid 4. Thereafter, the sludge liquid 4 is sucked by the sludge liquid suction pump 7, and the sludge liquid 4 is transferred to the transfer tank T2 via the pipe lines R1 and R3. As a result, a predetermined amount of sludge 1 is transferred from the sludge storage tank T1 to the transfer tank T2. Thereafter, the pipes R2 and R3 are washed by the washing means 10.

  In this way, when the sludge liquid 4 is transferred into the transfer tank T2 and the cleaning of the pipes R2 and R3 is completed, the sludge 1 in the sludge liquid 4 is settled and separated into the sludge 1 and the supernatant water 2. stand by. After separation into the sludge 1 and the supernatant water 2, as shown in FIG. 2, the supernatant water 2 in the transfer tank T2 is sucked by the supernatant water suction pump 8, and the supernatant water 2 is supernatant via the pipelines R4 and R2. The water spray nozzle 9 sprays the sludge 1 stored in the sludge storage tank T1. At this time, since the remaining amount of the supernatant water 2 in the sludge storage tank T1 is small, the sludge 1 is reliably pulverized by spraying the supernatant water 2. The stirrer 3 cannot be used in the sludge storage tank T1 in which the remaining amount of the supernatant water 2 is reduced. Thereafter, the pipes R5 and R2 are washed by the washing means 10.

  Next, when the supernatant water 2 is accumulated in the sludge storage tank T1 by spraying the supernatant water 2, the stirrer 3 is operated instead of spraying the supernatant water 2, and again, as shown in FIG. 1, the sludge storage tank T1 Sludge liquid 4 is formed inside. Then, the sludge liquid 4 is transferred into the transfer tank T2.

  By repeating the above operation, the sludge 1 stored in the sludge storage tank T1 can be transferred into the transfer tank T2.

  As described above, according to the present invention, all operations from the pulverization to the transfer of the sludge 1 can be performed by the remote control by the control means, so that the radiation exposure of the worker can be minimized.

  In addition, since the supernatant water 2 is circulated and used, the amount of radioactive waste does not increase, and the sludge 1 is pulverized by spraying the supernatant water 2 from the first stage by the agitator 3, so that the sludge 1 is pulverized reliably in a short time. As a result, the sludge 1 can be transferred in a short time.

  Further, since the agitator 3 can freely move in the supernatant water 2 in the sludge storage tank T1, the sludge 1 at any location stored in the sludge storage tank T1 can be reliably and efficiently pulverized. As a result, the sludge 1 can be transferred in a short time.

  Further, by adjusting the injection nozzle 19 of the agitator 3, the sludge liquid 4 can be selectively passed to the sludge liquid suction pump 7 side, so that the sludge liquid 4 can be removed without changing the position of the sludge liquid suction pump 7. Efficient suction is possible.

1: Sludge 2: Supernatant water 3: Stirrer 4: Sludge liquid 5: Sludge liquid conveying means 6: Sludge pulverizing means 7: Sludge liquid suction pump 8: Supernatant water suction pump 9: Supernatant water spray nozzle 10: Washing means 11: Pure Water tank 12: Air tank 13: Surveillance camera 14: Surveillance camera 15: Stirrer body 16: Float 17: Ballast tank 18: Suction pump for agitator 19: Injection nozzle 20: Cylinder 21: Air hose 22: Sight glass 31: Sludge 32 : Supernatant water 33: Air blowing device 34: Air supply source 35: Air pipe 36: Air nozzle 37: Sludge liquid 38: Sludge liquid supply path 39: Supernatant water supply path 40: Supernatant water ejection means 41: Supernatant water pipe 42: Supernatant water ejection nozzle 43: Inspection hole 44: Radiation blocking means 45 Surveillance cameras 46: monitor camera 47: control device

Claims (3)

In the radioactive sludge transfer device that transfers the sludge stored with the supernatant water in one tank to the other tank,
A stirrer for forming a sludge liquid by spraying the supernatant water in the one tank onto the sludge stored in the one tank, and a sludge liquid transfer means for transferring the sludge liquid in the one tank to the other tank Sludge crushing means for crushing the sludge by spraying the supernatant water formed by sedimentation of sludge in the sludge liquid in the other tank to the sludge stored in the one tank, the stirrer, and the sludge liquid A control means for remotely controlling the operation of the transfer means and the sludge crushing means, and the sludge liquid transfer means includes a sludge liquid suction pump for sucking the sludge liquid in the one tank and transferring it to the other tank. The sludge crushing means comprises a supernatant water suction pump for sucking the supernatant water in the other tank; A supernatant water spray nozzle that sprays the supernatant water sucked by the supernatant water suction pump onto the sludge stored in the one tank, and the agitator is freely movable in the supernatant water in the one tank. The radioactive water sludge transfer device characterized in that the nozzle position of the supernatant water spray nozzle can be freely adjusted.   2. The radioactive sludge transfer apparatus according to claim 1, wherein the agitator blows air and supernatant water in the one tank to form sludge liquid on the sludge stored in the one tank. 3.   The stirrer includes a stirrer body, a float that imparts buoyancy to the stirrer body, a ballast tank that adjusts the buoyancy of the stirrer body, a suction pump for the stirrer that sucks supernatant water in the one tank, and the stirrer 3. The radioactivity according to claim 1, further comprising: an injection nozzle that injects the supernatant water sucked by the suction pump for use, wherein the injection angle of the supernatant water is freely adjustable. Sludge transfer device.

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