KR200419991Y1 - Magnetic decontamination system of small or medium size solid radioactive waste by permanent magnet - Google Patents

Abstract

The present invention relates to a solid radioactive waste self-decontamination facility, casing (10) formed with a seating portion (11) at the top; A decontamination vessel 20 seated on the seating portion 11, in which an abrasive G composed of a magnetic substance or a diamagnetic substance is accommodated, and an inlet 21 and a drain 22 are formed; A magnetic field generator 30 installed inside the casing 10 to apply a magnetic field to the abrasive G in the decontamination vessel 20; Washing water supply device 40 for supplying the washing water to the inlet 21 of the decontamination vessel 20; And a washing water treatment device 50 for treating the washing water that has undergone the washing drained from the drain port 22 of the decontamination container 20.

Description

Magnetic decontamination system of small or medium size solid radioactive waste by permanent magnet}

1 is a view showing the configuration of a solid radioactive waste self-decontamination facility according to the present invention,

Figure 2 is a perspective view showing an extract of the casing and decontamination vessel of Figure 1,

3 is a side view showing an extract of the magnetic field generating device employed in FIG.

4 is a view for explaining a permanent magnet disposed on the intermediate disk of FIG.

5 is a view showing an extract of the transfer crane and jig for transporting the decontamination object to the casing of FIG.

<Description of Symbols for Main Parts of Drawings>

10 ... casing 10a ... wheels

11 ... mounting area 12 ... heat sink

13 ... control panel 20 ... decontamination vessel

21 ... inlet 22 ... drain

23 ... sealing plug 25 ... protrusion

26 ... cover 26a ... handle

27 ... fastening member 30 ... magnetic field generator

31 ... motor 32 ,,, magnetic field generator

33 ... rotating shaft cover 34 ... upper disc

35 ... lower disc 36 ... intermediate disc

37 ... permanent magnets 40 ... washing water supply

40a ... Wheels 41 ... Washing water supply line

42 ... washing water supply valve 50 ... washing water treatment system

50a ... Wheel 51 ... Washing and drainage line

52 ... water drain valve 53 ... sheave

54 ... Bag filter 55 ... Drain line

56 ... Drain valve 58 ... Sub-wash water supply line

59 ... subwash water supply valve 60 ... jig

61 ... jig pin 70 ... removable crane

70a ... wheel 71 ... cylinder

The present invention relates to a solid radioactive waste self-decontamination facility, and more specifically, to radioactive pollutants remaining on the inner and outer surfaces of medium and small metallic or non-metallic solid radioactive waste generated during operation and decommissioning of nuclear facilities. The present invention relates to a solid radioactive waste self-decontamination facility capable of decontamination in a magnetic manner.

In general, when operating or dismantling nuclear facilities, a considerable amount of metallic or non-metallic solid radioactive waste (hereinafter referred to as decontamination) is generated. Since radioactive contaminants remain on the inner and outer surfaces of the decontamination object, if thrown away as it is, it may cause fatal environmental pollution. Therefore, it is important to reliably remove radioactive contaminants remaining on the decontamination object.

Conventionally, the removal of radioactive pollutants remaining in solid radioactive waste proceeds by physical decontamination using a brush, high pressure water or ultrasonic cleaning, or by chemical decontamination using electrolytic acid or electrolytic decontamination.

However, when the radioactive contaminants are removed from the decontamination object by the physical decontamination method or the chemical decontamination method, there is always a possibility that the worker performing decontamination is exposed to radiation, which is very dangerous.

In addition, since there were many differences in decontamination efficiency depending on the type and shape of the decontamination target, it was not clear whether decontamination was in progress. In particular, chemical decontamination or electrolytic decontamination mainly uses strong acids, so during the decontamination process, workers could inhale strong acids, which could lead to fatal diseases. Furthermore, strong acids used to corrode liquid waste treatment systems.

The present invention was created to solve the above problems, and an object of the present invention is to provide a solid radioactive waste self-decontamination facility that can exclude the possibility of workers exposed to radiation during decontamination.

Another object of the present invention is a solid radioactive waste self-decontamination equipment that can be decontaminated even if there are various kinds and shapes of decontamination objects, and can eliminate the possibility of exposure to strong acid by workers who perform decontamination because no strong acid is used. To provide.

In order to achieve the above object, the solid radioactive waste self-decontamination facility according to the present invention, the casing 10 is formed with a seating portion 11 on the top; A decontamination vessel 20 seated on the seating portion 11, in which an abrasive G composed of a magnetic material or a diamagnetic material is accommodated, and an inlet 21 and a drain 22 are formed; A magnetic field generating device (30) installed inside the casing (10) to apply a magnetic field to the abrasive (G) in the decontamination vessel (20); Washing water supply device 40 for supplying the washing water to the inlet 21 of the decontamination vessel 20; And a washing water treatment device (50) for treating the washing water that has undergone the washing drained from the drain port (22) of the decontamination vessel (20).

In the present invention, it further comprises a jig 60 for supporting a decontamination object that is difficult to handle by hand due to heavy weight or severely contaminated with radioactivity, or for moving the jig 60 to the decontamination vessel 20. The mobile crane 70 may further include.

In the present invention, the magnetic field generating device 30 is rotated by the motor 31 and the motor 31 installed inside the casing 10, and is located below the seating part 11. It includes a magnetic field generator 32 for generating a magnetic field. At this time, the magnetic field generating unit 32 is a rotary shaft cover 33 fixed to the rotary shaft of the motor 31, an upper disc 34 fixed to the upper side of the rotary shaft cover 33, and the rotary shaft cover ( A lower disc 35 fixed to the lower side of the upper surface 33, an intermediate disc 36 provided between the upper disc 34 and the lower disc 35, and a plurality of permanent discs installed on the intermediate disc 36. Magnet 37. Here, the intermediate disk 36 is divided into a sector having a fan-shaped partition with respect to the center thereof, a plurality of permanent magnets 37a are installed in the even-numbered partition of the intermediate disk 36 so that the N poles face upwards. In the odd-numbered section, a plurality of permanent magnets 37b are provided so that the S poles face upwards.

In the present invention, the inner portion of the decontamination vessel 20 is formed with a protrusion 25 protruding upward.

In the present invention, a cover 26 is installed on the decontamination vessel 20 to prevent the radioactive pollutant in the form of particulates generated during decontamination to be discharged to the outside.

In the present invention, the washing water treatment device 50, the sieve 53 which can recover and wash the abrasive (G) contained in the washing water, and is installed on the lower side of the sheave 53 is included in the washing water Bag filter 54 for treating the radioactive contaminants in the form of particulates, and a drain tank line 55 for transferring the washing water through the bag filter 54 to a drain tank (not shown).

In the present invention, the washing water treatment device 50 is connected to the washing water supply device 40 through the sub-wash water supply line 58, the sub-wash water supply valve 59 in the sub-wash water supply line 58 Is installed.

Hereinafter, with reference to the accompanying drawings, a solid radioactive waste self-decontamination facility according to the present invention will be described in detail.

1 is a view showing the configuration of a solid radioactive waste self-decontamination facility according to the present invention, Figure 2 is a perspective view showing the casing and decontamination vessel of Figure 1, Figure 3 is a magnetic field generating device employed in Figure 2 Figure 4 is a side view showing an extract, Figure 4 is a view for explaining a permanent magnet disposed on the intermediate disk of Figure 3, Figure 5 is an extract showing the transport crane and jig for transporting the decontamination object to the casing of Figure 1 One drawing.

As shown, the solid radioactive waste self-decontamination facility according to the present invention, the casing 10 formed with a seating portion 11 on the top; A decontamination vessel 20 seated on the seating portion 11, in which an abrasive G composed of a magnetic substance or a diamagnetic substance is accommodated, and an inlet 21 and a drain 22 are formed; A magnetic field generator 30 installed inside the casing 10 to apply a magnetic field to the abrasive G in the decontamination vessel 20; A washing water supply device 40 for supplying the washing water to the inlet 21 of the decontamination container 20; It includes; a washing water treatment device 50 for treating the washing water proceeds to wash out from the drain 22 of the decontamination vessel (20).

Two seating portions 11 are formed at an upper portion of the casing 10, and each seating portion 11 is implemented by recessing the upper surface of the casing 10 by about 5 cm. Since the mounting portion 11 is recessed from the casing 10, the decontamination container 20 may be safely seated on the mounting portion 11.

The casing 10 is provided with a heat radiating fan 12 for discharging heat generated by the motor 31 when the motor 31, which is a configuration of the magnetic field generating device 30, to be described later is operated. By providing the heat radiating fan 12, overheating of the motor 31 can be prevented.

The control panel 13 is installed on the front portion of the casing 10. The control panel 13 includes a power switch for turning on / off power applied from the outside, a motor operation switch for operating the motor 31 and the heat radiating fan 12, and a rotation for adjusting the rotation speed of the motor 31. A water control switch, a timer switch for setting the decontamination time, and an alarm indicating that decontamination is completed are installed. Since the control panel 13 is provided on the front portion of the casing 10, the self-decontamination facility of the present application can be easily operated.

The lower part of the casing 10 is provided with a moving wheel 10a for moving the casing 10, whereby the casing 10 can be easily moved to another place.

The magnetic field generator 30 includes a motor 31 installed inside the casing 10 and a magnetic field generator 32 that is rotated by the motor 31 and is positioned below the seating portion 11 to generate a magnetic field. ).

The magnetic field generating unit 32 may be manufactured in various forms. In this embodiment, the rotary shaft cover 33 fixed to the rotary shaft 31a of the motor 31 and the upper portion fixed to the upper side of the rotary shaft cover 33 are provided. The disc 34, the lower disc 35 fixed to the lower side of the rotary shaft cover 33, the intermediate disc 36 provided between the upper disc 34 and the lower disc 35, and the intermediate disc 36 It includes a plurality of permanent magnets (37) are installed in.

Here, the intermediate disk 36 is divided into eight sectors having a fan shape with respect to the center thereof. In the even division, a plurality of permanent magnets 37a are provided so that the N pole faces upward, and the odd division has the S pole. A plurality of permanent magnets 37b are installed to face the upper portion. In this way, the permanent magnet is spaced in the partitioned portion of the intermediate disk 36, the N pole and the S pole alternate (N pole-S pole-N pole-S pole-N pole-S pole-N pole-S pole) When installed, the magnetic field changes instantaneously than the single pole (N pole-S pole), so that the abrasive in the decontamination vessel 20 vibrates more violently up / down / left / right, The surface is polished efficiently.

The washing water supply line 41 connected to the washing water supply device 40 is detached from the inlet 21 formed at the upper side of the decontamination container 20. The inlet 21 may be coupled to the sealing plug 23 so that the washing water is not discharged to the outside when decontamination proceeds.

The decontamination vessel 20 is for decontaminating radioactive contaminants remaining in the decontamination object P, and therein, an abrasive G of a magnetic substance or a diamagnetic substance is accommodated therein. In the inner center of the decontamination vessel 20, a protrusion 25 having a height of about 10 cm is formed.

When the motor 31 rotates the magnetic field generating portion 32, a change in the magnetic field occurs in the decontamination vessel 20. Since the permanent magnet is installed in the sector of the fan-shaped section of the intermediate disk, it occurs at the edge of the intermediate disk. The change in the magnetic field is greater than the change in the magnetic field generated at the center. Therefore, even in the decontamination vessel 20, the change in the magnetic field toward the inner peripheral surface edge side is larger.

When a change in the magnetic field occurs in the decontamination vessel 20, the abrasive (G) made of a magnetic substance and a diamagnetic substance is shaken up, down, left, and right to decontaminate the radioactive pollutants remaining in the decontamination object (P). In this case, since the change in the magnetic field increases toward the edge of the inner circumferential surface of the decontamination vessel, the abrasive (G) or the decontamination object (P) may be concentrated toward the center of the decontamination vessel 20 in which the change in the magnetic field is weak. In order to prevent this, by forming the protrusion 25 in the center of the decontamination vessel 20 to prevent the abrasive (G) or decontamination object (P) from driving to the center side, even if driven to the center side, the abrasive (G) or decontamination object. (P) hits the protrusions 25 and protrudes toward the inner peripheral surface of the decontamination vessel so that the decontamination efficiency does not decrease.

A lid 26 is installed on the decontamination vessel 20 to prevent the secondary radioactive pollutant in the form of particulates generated during decontamination to the outside, and a handle 26a is installed on the lid 26. The cover 26 may be fastened to be sealed to the upper portion of the decontamination vessel 20 by the fastening member (27).

The washing water supply device 40 is for washing some of the radioactive contaminants remaining on the surface of the abrasive G and the decontamination object P in the decontamination vessel 20 after decontamination. To this end, the washing water supply device 40 is connected to the inlet 21 through the washing water supply line 41, the washing water supply valve 42 is installed in the washing water supply line 41 to control the transfer of the washing water. With this structure, when the washing water supply valve 42 is opened, the washing water supply device 40 may supply the washing water to the decontamination vessel 20 through the washing water supply line 41.

In addition, the lower portion of the washing water supply device 40 is provided with a moving wheel (40a) for moving the washing water supply device 40, it is possible to easily move the washing water supply device 40 to the place.

The washing water treatment apparatus 50 is for safely treating the washing water drained from the decontamination vessel 20 after decontamination. To this end, the washing water treatment apparatus 50 is connected to the drain 22 through the drain 22 through the washing water draining line 51, and to the washing water draining line 51 to control the transfer of the drained washing water. The valve 52 is installed. By this structure, when opening the washing water drain valve 52, the fresh water drained from the decontamination vessel 20 can be drained to the washing water treatment device (50).

The washing water treatment device 50 is for safely treating particulate or liquid secondary radioactive pollutants contained in the drained washing water and recovering the abrasive (G). To this end, the washing water treatment apparatus 50 includes a sieve 53 capable of recovering and washing the abrasive G included in the washing water, and a secondary particle having a particulate form installed in the lower side of the sieve 53. A bag filter 54 of several tens of micrometers or less for treating radioactive pollutants, and a drain tank line 55 for transferring the washing water passing through the bag filter 54 to a drain tank (not shown). At this time, the sump line 55 is provided with a sump valve 56.

The washing water treatment device 50 is connected to the washing water supply device 40 through a separate subwashing water supply line 58, and the subwashing water supply line 58 is provided with a subwashing water supply valve 59. The sub-wash water supply line 58 supplies clean washing water to the washing water treatment device 50 to wash the abrasive G recovered from the sieve 53.

The lower portion of the washing water treatment device 50 is provided with a moving wheel 50a for moving the washing water treatment device 50, and thus, the washing water treatment device 50 can be easily moved to another place.

On the other hand, inside the decontamination vessel 20 is longer than the radius of the decontamination vessel 20, the jig 60 for supporting the decontamination object (P) that is difficult to handle by hand due to a lot of weight or radioactive contamination is installed is installed It may be, and the movable crane 70 for transferring the jig 60, the decontamination object (P) is supported to the decontamination vessel 20 may be employed.

The jig 60 is a jig pin 61 for preventing the decontamination object P from being moved in the decontamination process, and a height adjustment support for adjusting the height of the jig 60 in the decontamination container 20 (not shown). ).

The movable crane 70 moves the jig 60 on which the decontamination object P is seated to the decontamination vessel 20. At this time, the movable crane 70 is provided with a cylinder 71 for elevating the jig 60 to the lower side, and the wheel 70a for movement is installed at the lower portion.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible.

As described above, according to the solid radioactive waste self-decontamination facility according to the present invention, it is possible to exclude the possibility that the worker is exposed to radiation while the decontamination is in progress.

In addition, even if the type, shape, etc. of the decontamination object is various, it is possible to decontaminate reliably, and since the strong acid is not used, the possibility of exposing the worker to the strong acid can be excluded.

In addition, since the radioactive pollutants in the form of particulates generated during the decontamination process are treated by the bag filter and the liquid radioactive waste is disposed of by the drainage tank, it is possible to eliminate the possibility of polluting the environment by the discharge of the liquid radioactive waste.

And if the decontamination object is heavy or longer than the radius of the decontamination vessel, and severely contaminated with radioactivity, it can be transported to the decontamination vessel using mobile cranes and jigs, so that the operator may not have to directly contact the decontamination object. It works.

Claims (10)

A casing 10 having a seating portion 11 formed thereon; A decontamination vessel 20 seated on the seating portion 11, in which an abrasive G composed of a magnetic material or a diamagnetic material is accommodated, and an inlet 21 and a drain 22 are formed; A magnetic field generating device (30) installed inside the casing (10) to apply a magnetic field to the abrasive (G) in the decontamination vessel (20); Washing water supply device 40 for supplying the washing water to the inlet 21 of the decontamination vessel 20; And Solid-state radioactive waste self-decontamination apparatus comprising a; washing water treatment device for processing the washing water that has undergone the washing drained from the drain port 22 of the decontamination vessel (20). The method of claim 1, It further comprises a jig 60 for supporting a decontamination object (P) that is heavy weight or severely contaminated with radioactivity and difficult to handle by hand, the jig (60) is a jig for preventing the decontamination object (P) is not moved Solid radioactive waste self-decontamination equipment, characterized in that the pin 61 is formed. The method of claim 2, Further comprising a movable crane 70 for moving the jig 60 to the decontamination vessel 20, the movable crane 70 is provided with a cylinder 71 for elevating the jig 60 to the lower side Solid radioactive waste self-decontamination equipment, characterized in that. The method according to any one of claims 1 to 3, The magnetic field generating device 30 is a motor 31 installed inside the casing 10 and rotated by the motor 31, which is located below the seating portion 11 to generate a magnetic field. Solid radioactive waste self-decontamination equipment comprising a generator 32. The method of claim 4, wherein The magnetic field generator 32 has a rotating shaft cover 33 fixed to the rotating shaft of the motor 31, an upper disc 34 fixed to an upper side of the rotating shaft cover 33, and the rotating shaft cover 33. A lower disk 35 fixed to the lower side of the intermediate disk 36 installed between the upper disk 34 and the lower disk 35 and a plurality of permanent magnets installed on the intermediate disk 36 ( Solid radioactive waste self-decontamination apparatus comprising a 37). The method of claim 5, The intermediate disk 36 is divided into sectors having a fan shape with respect to the center thereof, and a plurality of permanent magnets 37a are installed in even-numbered sections of the intermediate disk 36 so that the N poles face upwards, Solid radioactive waste self-decontamination equipment, characterized in that a plurality of permanent magnets (37b) is installed in the compartment so that the S pole toward the top. The method according to any one of claims 1 to 3, Solid radioactive waste self-decontamination facility, characterized in that the inner portion of the decontamination vessel 20 is formed with a protrusion 25 protruding upward. The method according to any one of claims 1 to 3, The upper portion of the decontamination vessel 20 is a solid radioactive waste self-decontamination facility, characterized in that the cover (26) is installed to prevent the radioactive pollutant in the form of particulates generated during decontamination to the outside. The method according to any one of claims 1 to 3, The washing water treatment apparatus 50 includes a sieve 53 capable of recovering and washing the abrasive G included in the washing water, and a radioactive contamination in the form of particulates installed in the lower side of the sieve 53. Solid radioactive waste self-decontamination equipment, characterized in that it comprises a bag filter 54 for processing the material, and a drain tank line 55 for transferring the washing water passing through the bag filter 54 to a drain tank (not shown). . The method according to any one of claims 1 to 3, The washing water treatment device 50 is connected to the washing water supply device 40 through the subwashing water supply line 58, and the subwashing water supply line 58 is provided with a subwashing water supply valve 59. Solid radioactive waste self-decontamination equipment.

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