Device for decontaminating radioactive waste container

FIELD: decontamination engineering.

SUBSTANCE: proposed device incorporates provision for admission to inner space of container through hole. This facility is, essentially, vehicle moved by drive. Vehicle traveling gear is free to move from pulled-in quiescent position to working position having large track width (B).

EFFECT: enhanced reliability and safety in operation.

12 cl, 3 dwg

 

The invention relates to intended for cleaning containers for radioactive waste storage device that you can enter through the hole in the inner space of the vessel.

A number of radioactive waste from nuclear power plants or nuclear-technical installations comes in liquid form or in the form of sludge. Before the waste can be sent for proper disposal, it is necessary intermediate storage. In practice, such intermediate storage is carried out in the immediate vicinity of the nuclear power plant or nuclear engineering intended for installation in tanks or containers in storage. These are usually massive in order to maintain as small as possible level of environmental exposure. To fill capacity and access for maintenance or cleaning is provided, as a rule, one hole, the size of which, moreover, are usually chosen very small. Despite the size of the openings of such tanks or storage containers are fully closed shell, consisting, for example, from concrete frame with an inner lining of stainless steel.

Depending on the duration of interim storage inside due to deposits on the inner lining or on the surface of the tank floor can about Rosaviatsia radioactive contaminated sediments, for example, in the form of precipitated or bicrystalline solids. These sediments cannot be removed by simple pumping fluid waste must be removed through uniform intervals using the appropriate cleaning device, which is inserted through the opening into the internal cavity, with the aim of ensuring long-term reliable operation.

From DE 19617613 A1 it is known, for example, designed for this purpose, the device having a guide bearing, through which the cranked hinge connected with the pivoting arm. On turning the lever through a rotary joint mounted swing arm equipped with a number of spray nozzles. The device can be entered into the vessel through the hole and fasten it on the plot holes outside of the tank. However, its installation can be rotated, you can cover and clean any area of the inner casing or the surface of the bottom.

But the problematic use of such devices is in practice in such containers, which are within one or more columns, as this requires a large number of hinges, so you can safely get all the parts of the wall. Because of this, the device is expensive, in particular when the dimensions of the container and, thereby, its own weight consoles hundred is Owada large, which leads to difficulties in management. In addition, such devices can be used only with severe limitations for different sizes of containers. In addition, they require a reliable fixation on the tank, so the universal applicability of the device is not present.

The basis of the invention lies in the task of creating a device clean containers for radioactive, in particular fluid, waste, used universal and cost. This device features must be broad independence from possible available within the capacity of the columns.

According to the invention this task is solved in that the device is made in the form of a drive of the rolling of the vehicle chassis which moves from venutolo position of rest into the operating position with a larger width of the gauge.

In the invention came from the fact that by placing the device inside the tank maybe its universal application in various types of containers. Using roaming the drive device can reach the recesses with a narrow entrance or other closed areas inside the tank and easily around the column. To ensure and also with a relatively small openings sufficient stability of movement of the vehicle it after entering through the hole from the floor the rest position with a small surface to move in an extended working position, what you can transport large cargoes and easily perceive the efforts that occur when large arrows with the corresponding relations of the levers. In addition, there is no need for difficult fixation device in the area of the hole. The vehicle may be in the rest position and the working position double track, but in the working position it is possible to have at least one additional track.

Gauge in accordance with the conditions inside the tank to change to clean hard to reach areas of the vessel. Especially preferred embodiment of the present invention is achieved by the fact that the vehicle has a relatively smaller hole gauge only in the resting position. Only to enter the vehicle in the inner space of the vessel is set stenothoe resting position, which thereby provides an individual application, in particular, without prior dismantling of the vehicle. In the inner space of the vessel, the vehicle pulled out in a given operating position, which is maintained during the cleanup.

Particularly advantageous embodiment of the device according to the invention is achieved by the fact that the vehicle has the two installed on both sides of the boom, turning in particular, using a pantograph guide. At essentially symmetrical arrows with several rollers or wheels in the same gauge, which can be changed by turning. Thanks to the guide in the form of a pantograph reliably remains parallel movement along the tracks.

Another particularly promising embodiment of the present invention is achieved in the case when the driving mechanism is moved transversely to the longitudinal axis of the vehicle. Thus, the position of the vehicle is not affected by changing the gauge, because the driving mechanism moves transversely to the longitudinal axis. This may be greatly facilitated the operation of the vehicle. For example, the driving mechanism for this twin pantograph guide installed between the boom and the vehicle, the hinge of which is determined by the regulating unit.

This is especially useful when driving mechanism can be adjusted continuously by means of a hydraulic actuator. Thus you can easily install any suitable for the respective conditions of use of the gauge so as to optimize the cleaning process. In addition, the hydraulic drive provides a large extent the operation b is C noise and with low cost.

In the following a particularly practical embodiment, in which the driving mechanism is equipped with crawler tracks, the vehicle maximum traction. Thus the uneven ground can be overcome without difficulty also in the case when deposits of viscous flow. Chain - mainly rubberized or provided with a rubber layer in order to achieve the best coupling with the ground. In addition, to further improve the grip has the ability to load the vehicle with the cargo so that was increased pressing force to the ground.

Following a particularly expedient embodiment of the invention is achieved by the fact that the vehicle is fixed, the spray device and/or the agitator. Using the spray device can dissolve and wash off adhering to the inner surface of the vessel wall remains, which you can then remove the conventional pump. With the help of a mixer can only to the extent necessary to increase the fluidity of residues with the addition of liquid so that the residues are removed by the pump. The vehicle may be equipped with a receiving device for selectively fastening the spray device or mixer.

This is particularly advantageous when the spray device and/or prevented is and rotary mounted on the vehicle for better access. At the same time thus you can change the spray angle and due to this process remains stuck in different directions of flow. Thus can be securely removed sticky residue.

The following particularly advantageous variant of performance is achieved by the fact that the spray device has a linearly moving the spray nozzle. Thus, the spray nozzle can be moved in the direction close proximity to the loading area capacity, for example, using the telescopic section of the spray device or similar device, and thus the quality of cleaning is increased.

Another suitable modification is created, if the vehicle includes a pump for the immediate removal of dissolved and, therefore, fluid residues. For this purpose, the pump is connected, for example, with connection hose leading through the hole to the outside. Peeled part of the crown surface and the vessel wall after that are not contaminated released remnants processed after plots.

In especially close to the practical application of the embodiment of the present invention, the vehicle is equipped with a camera. With it staff can monitor the operation of the vehicle from a safe distance and the document is to ensure it. At the same time by means of the control device from the received capacity settings to create a programme of work and, for example, to work out her vehicle without the operator's intervention. It is necessary for this connector or connecting hoses are summed up and stretched.

In addition, a modification, in which the vehicle is made waterproof, suitable for long-term use below the liquid level inside the tank, so the vehicle can be applied before or during emptying of the tank, and thereby the cleaning process easier.

Achieved by the invention strengths lie primarily in the fact that, due to the possibility of changing the gauge of the vehicle become possible as highly effective in the working position of the underlying surface and, thereby, good working stability, and in the resting position a relatively small base surface and thereby simply performing the through hole capacitance. It is therefore used inside the tank to clean the vehicle and into the inner space, for reasons of stability. As a result, the application of the mobile device itself, it is possible that promotes access and also a slave who whose flexibility for potentially infected tanks.

An example of performing the invention is illustrated more in detail with the help of drawings. In the drawings shown:

Figure 1 is intended for cleaning of containers for radioactive residues device, side view,

Figure 2 is a top view shown in figure 1 device

Figure 3 - side view shown in figure 1 of the device with the mixer.

The same parts in all drawings provided with the same positions.

Figure 1 shows a device 1 according to the invention in a partially cut from the side view, which is intended for cleaning neizabranog capacity. The device 1 is made as a self-propelled vehicle 2, the driving mechanism 4 which is made with crawler tracks 6. When driven work independently with a drive 8 track tape 6 provide maximum grip in such a way that provides the maneuverability of the vehicle even under severe conditions. Consequently, the vehicle 2 can easily reach and hard-to-reach areas of the vessel.

The vehicle 2 includes at the end of the mixer 10, secured in the receiving device 12 can be rotated. Using the actuator 14 of rotation of the mixer 10 can be rotated about 45° in both directions. In the middle part of the vehicle 2 is protected from the influence of the environment control device 16 within the receiving device 18, through which can also be used and below the liquid level inside the tank. Transfer of control data on installed outside of the tank device control is done with the help shown by wires or wirelessly. The vehicle 2 may thus be used in different containers.

To enter the vehicle 2 in the internal space of the vessel through a relatively small aperture driving mechanism 4 can be moved transversely to the longitudinal axis 20 of the vehicle 2, as it details shown in figure 2. You can see on the one hand beneath the longitudinal axis 20 stenothoe position of rest with reduced relative to the hole gauge b, on the other hand over the longitudinal axis 20 to the extended position with a larger gauge Century Crawler belt for this set on the boom 22 of the vehicle 2, which can smoothly move along the guide in the form of a pantograph 24 by means of a hydraulic actuator 26.

In contrast, figure 3 shows a modified embodiment of the vehicle 2, a side view, wherein in the receiving device 12 is fixed, the spray device 28 using the rotary actuator 30. The spray device 28 has a telescopic section 32 in order to be thus able to move the spray with the PLO 34 in position relative to the inner vessel wall. In addition, the vehicle 2 is provided at its opposite spray device 28 the end of the pump 36, which can be removed fluid residues. In addition, the vehicle 2 can be fixed not seen the camera in order to have convenient control of the cleaning process, and translation movements of the vehicle 2.

1. Device for cleaning tanks for radioactive waste with the possibility of entering through the hole in the inner space of the vessel, characterized in that the device (1) is moved by the actuator (8) vehicle (2), driving mechanism (4) which is arranged to move from venutolo position of rest into the operating position with a larger width gauge (C).

2. The device (1) according to claim 1, in which the driving mechanism (4) has a relatively smaller hole gauge (b) only in the resting position.

3. The device (1) according to claim 1 or 2, in which the driving mechanism (4) is installed on both sides, in particular, using the guide in the form of a pantograph (24), rotary shafts (22).

4. The device (1) according to one of the preceding paragraphs, in which the driving mechanism (4) is mounted for movement transversely to the longitudinal axis (20) of the vehicle (2).

5. The device (1) according to one of the preceding item is in, in which the width (b, C) gauge undercarriage mechanism (4) can be infinitely adjusted by means of a hydraulic actuator (26).

6. The device (1) according to one of the preceding paragraphs, in which the driving mechanism (4) is equipped with crawler tracks (6).

7. The device (1) according to one of the preceding paragraphs in which the vehicle (2) is fixed to the spray device (28) and/or mixer (10).

8. The device (1) according to claim 7, in which the spray device (28) and/or mixer (10) is made rotatable.

9. The device (1) according to claim 7 or 8, in which the spray device (28) contains moved linearly spray nozzle (34).

10. The device (1) according to one of the preceding paragraphs in which the vehicle (2) includes a pump (36).

11. The device (1) according to one of the preceding paragraphs in which the vehicle (2) is equipped with a camera for remote monitoring of its operation.

12. The device (1) according to one of the preceding paragraphs in which the vehicle (2) for operation below the surface of the liquid is made waterproof.



 

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