KR20160136589A - Automatic radioactive decontamination apparatus - Google Patents

Automatic radioactive decontamination apparatus Download PDF

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Publication number
KR20160136589A
KR20160136589A KR1020150070264A KR20150070264A KR20160136589A KR 20160136589 A KR20160136589 A KR 20160136589A KR 1020150070264 A KR1020150070264 A KR 1020150070264A KR 20150070264 A KR20150070264 A KR 20150070264A KR 20160136589 A KR20160136589 A KR 20160136589A
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KR
South Korea
Prior art keywords
decontamination
shielding booth
shielding
booth
unit
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Application number
KR1020150070264A
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Korean (ko)
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KR101720859B1 (en
Inventor
최진흥
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최진흥
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Priority to KR1020150070264A priority Critical patent/KR101720859B1/en
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor

Abstract

The present invention relates to a fixed radioactive decontamination apparatus, and more particularly, to a fixed radioactive decontamination apparatus in which contaminants contaminated with radioactivity are placed in a sealed shielding booth and subjected to decontamination through dry ice pellets. The stationary type automatic decontamination apparatus according to the present invention comprises a shielding booth having an inner space, a door formed at one side thereof, a door being closed when the door is closed, and a shielding booth installed inside the shielding booth, And a spray unit disposed on an inner wall of the shielding booth for spraying dry ice pellets toward a decontamination object placed on the support.

Description

{AUTOMATIC RADIOACTIVE DECONTAMINATION APPARATUS}

The present invention relates to a fixed radioactive decontamination apparatus, and more particularly, to a fixed radioactive decontamination apparatus in which contaminants contaminated with radioactivity are placed in a sealed shielding booth and subjected to decontamination through dry ice pellets.

Generally, most of the reactor equipment and equipment that are used in nuclear facilities and that have to be disposed of at the end of their lifetime are contaminated with radioactivity.

Such buildings, facilities, machinery, and structures contaminated with radioactivity should not be simply buried or incinerated, but must be disposed of in accordance with the provisions of the Atomic Energy Act and Environmental Law, after decontamination, such as decontamination and cutting, Many decontamination treatments have conventionally been performed in accordance with the regulations.

The simplest and most widely applied method is manual. That is, it is a method by which a person directly decontaminates radiation-contaminated devices or equipment. However, such manual decontamination has a disadvantage in that it takes a long time to remove the pollutants in the ineffective and fine gaps in the process, as well as the contamination of the workers in the decontamination process and contamination around the work site.

As described above, in the decontamination process by hand, the decontamination object device is placed in a denitrification tank and the denitrification tank is filled with hot water and decontamination liquid at a predetermined ratio. Keep it for about 1 ~ 3 hours depending on the degree of contamination of the air hole so that the pollutants deposited on the device are separated.

After a certain period of time, the apparatus is taken out and placed on a work bench, and the pollutants are decontaminated using a cleansing paper and a brush, and decontamination is carried out with flowing water for 2 to 3 times. However, it has been difficult to decontaminate by bending parts, holes, and curved parts due to the excessive time required for the decontamination by manual operation, the increase of the waste liquid generated during the decontamination process, and the like.

Japanese Patent Publication No. 5584706 discloses a method of chemically decontaminating a radioactive contaminated surface among metal parts. Korean Patent Registration No. 10-0583142, which is a patent document 2, Discloses a physical decontamination apparatus for removing radioactive contaminants in a steam generator chamber, which includes a compressed air supply unit for supplying compressed air to a spent facility at a low cost and high efficiency, collecting contaminants and reducing the amount of radiation exposure.

However, even in a number of documents including these prior documents, a fixed type radioactive decontamination apparatus having a high decontamination efficiency over the contaminant surface is not proposed for a substance to be contaminated with the radioactive substance.

Japanese Patent Publication No. 5584706: Decontamination method of radioactive contaminated surface Korean Patent No. 10-0583142: Physical decontamination equipment for removing radioactive contaminants from steam generators Korean Patent Publication No. 10-0638400: Radioactive contaminant decontamination apparatus

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for spraying dry ice pellets with contaminants contaminated with radioactivity, To provide a fixed type radioactive decontamination apparatus capable of increasing the decontamination efficiency by spraying dry ice pellets.

The stationary type automatic decontamination apparatus according to the present invention comprises a shielding booth having an inner space, a door formed at one side thereof, a door being closed when the door is closed, and a shielding booth installed inside the shielding booth, And a spray unit disposed on an inner wall of the shielding booth for spraying dry ice pellets toward a decontamination object placed on the support.

Preferably, the stationary radiation decontamination apparatus further comprises a camera for photographing the inside of the shielding booth, and a radiation sensor for measuring the degree of radioactive contamination inside the shielding booth.

Wherein the support portion includes a fixing member for rotatably supporting the decontamination object while the dry ice pellet is being sprayed for decontamination operation, a rotary plate rotatably coupled to the upper portion of the fixing member, And a rotation driving unit for rotating the rotary plate, wherein the injection unit is formed in a ceiling surface of the shielding booth other than a side where the door is formed in the shielding booth, A traveling member provided on a wall surface or a ceiling of a shielding booth, a traveling member capable of traveling along the guide member, a traveling driving unit for moving the traveling member along the guide member, And a spray nozzle for spraying the dry ice pellet toward the seated decontamination object .

And a filter unit communicating with the inside of the shielding booth and filtering contaminants contained in air discharged from the shielding booth after the decontamination operation. The filter unit includes a Hepa filter and a Charcoal filter, . ≪ / RTI >

The fixed radioactive decontamination apparatus according to the present invention can block the outflow of radioactive contaminants during the decontamination operation, and the spraying of the dry ice pellets can be efficiently performed over the entire surface of the decontamination operation object, thereby improving the efficiency of the decontamination operation. Can be minimized.

Those skilled in the art will recognize that the effects of the present invention can be widely accepted without departing from the foregoing description.

1 is a perspective view showing an embodiment of a fixed type automatic decontamination apparatus according to the present invention,
FIG. 2 is a partial cutaway view showing a pellet spraying unit and a supporting part of the fixed radioactive decontamination apparatus of FIG. 1;
3 is a configuration diagram showing a configuration of the fixed type automatic decontamination apparatus of FIG.

Hereinafter, a fixed type automatic decontamination apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1 to 3, a fixed type automatic decontamination apparatus 100 according to the present invention includes a shielding booth 110 having an inner space, a support 120 installed on the shielding booth 110, And a filter unit 160 for removing contaminants contained in the air discharged from the camera 140, the radiation sensor 150, and the shielding booth 110.

The shielding booth 110 is in the shape of a hexahedron having a predetermined internal space and on one side thereof is formed a door 111 for inserting or withdrawing the object of decontamination as an internal space.

The door 111 completely blocks the inside space and the outside of the shielding booth 110 when the door 111 is in the closed state and prevents the radioactive contaminants dropped from the decontamination operation object during the decontamination operation from leaking to the outside of the shielding booth 110 .

The support portion 120 is provided at the center of the bottom surface of the inner space of the shielding booth 110. The supporting part 120 is formed so as to rotate the decontamination object so that the dry ice pellets injected from the injection unit 130, which will be described later, can be uniformly sprayed onto the entire surface of the decontamination object.

That is, the support 120 includes a fixing member 121 fixed to the bottom surface of the shielding booth 110, a rotation plate 122 rotatably coupled to the upper portion of the fixing member 121, And a rotation driving unit 123 for rotationally driving the motor.

The fixing member 121 has a cylindrical shape and extends upward from the bottom surface of the shielding booth 110 by a predetermined length. The inside of the fixing member 121 is empty, and the rotation driving unit 123 is provided inside the fixing member 121. [

In this embodiment, the rotary plate 122 is formed in a simple planar shape. However, if necessary, the rotary plate 122 may be provided with a decontamination operation object It is possible to further include a separate clamping means for adjusting the clamping force.

The rotation drive unit 123 is for rotating the rotation plate 122 with respect to the fixing member 121 as described above and includes a rotation shaft 124 extending downward from the rotation plate 122, A rotation driving motor 127 provided on the inner side of the fixing member 121 and a driving gear 126 coupled to the rotation driving motor 127.

The driving gear 126 is meshed with the driven gear 125 so that the rotation shaft 124 rotates by driving the rotation driving motor 127. The rotation shaft 124 and the rotation plate 122 are engaged with each other, (122) is also rotated.

Although not shown, a rotating roller may be further provided at a lower portion of the rotating plate 122 to rotatably support the rotating plate 122 with respect to the fixing member 121.

In this embodiment, the spur gears are used as the power transmitting means for transmitting the driving force of the rotary drive motor 127, but a worm, a worm wheel or a bevel gear may be applied.

An actuator such as a pneumatic or hydraulic cylinder may be used as the driving means for providing the rotational force, but the rotational driving unit 123 may be formed to transmit power through the rack and the pinion.

The spray unit 130 is for spraying the dry ice pellets toward the decontamination object and is formed on the inner wall surface of the shielding booth 110 and the ceiling surface.

The injection unit 130 includes a guide member 131 installed on a wall surface or a ceiling surface, a travel member 133 capable of traveling along the guide member 131, a travel drive unit 135 for moving the travel member 133, And a spray nozzle 138 provided on the traveling member 133 for spraying the dry ice pellets.

The guide member 131 is formed so as to extend a predetermined length on the inner wall surface or ceiling of the shielding member. The guide member 131 is provided with an internal space for installing the travel driving unit 135, which will be described later, A slit 132 extending along the longitudinal direction is formed on one side of the exposed side so that the traveling member 133 can be moved.

The traveling member 133 is capable of traveling along a slit 132 formed in the guide member 131 and supports the spray nozzle 138 described later.

The travel driving unit 135 is for moving the traveling member 133 along the longitudinal direction of the guide member 131 and includes a rotating screw 136 extending along the longitudinal direction inside the guide member 131, And a traveling drive motor 137 for rotating the rotating screw 136. [

The rotating screw 136 is rotatably supported by a pillow block on the inside of the guide member 131 and has two engaging portions 134 which are screwed to the rotating member 136 on the traveling member 133 have. Therefore, when the rotary screw 136 is rotated by the travel driving motor 137, the traveling member 133 moves along the guide member 131.

The traveling driving motor 137 and the screw are applied to the traveling driving unit 135 in the present embodiment. Alternatively, the traveling member 133 may be formed to move along the longitudinal direction of the guide member 131 by the actuator.

In the present embodiment, the guide member 131 extends in a direction parallel to the bottom surface when the guide member 131 is formed on the wall surface, but the guide member 131 may extend in an inclined direction without being limited thereto.

The support unit 120 can rotate the object of decontamination and the spray unit 130 for spraying the dry ice pellets can move the dry ice pellet as the spray nozzle 138 moves along the longitudinal direction of the guide member 131 The decontamination operation can be smoothly performed on the entire surface of the object of decontamination.

The camera 140 is installed at one side of the inside of the shielding booth 110 and captures and transmits an internal image of the shielding booth 110 during the decontamination operation so that the administrator can control the inside of the shielding booth 110, The spraying position of the dry ice pellet can be controlled by arbitrarily adjusting the rotation of the rotary plate 122 and the position of the injection nozzle 138 of each injection unit 130 as necessary.

Also, the radiation sensor 150 is provided in the shielding booth 110, so that the radioactive contamination degree according to progress of the decontamination operation after inputting the decontamination object can be quantified and output. A separate display 151 for displaying the measured value of the radiation sensor 150 is provided on one side of the shielding booth 110 so that the measurement result of the radiation sensor 150 can be directly checked.

The filter unit 160 removes contaminants contained in the air in the process of discharging the air inside the shielding booth 110 after the decontamination operation.

The filter unit 160 is connected to an exhaust port (not shown) communicating with the inner space of the shielding booth 110 and includes an E-filter 161, a Hepa filter 162 and a charcoal filter 163 Charcoal filters are sequentially arranged.

When the air inside the shielding booth 110 is discharged after the completion of the decontamination operation or the decontamination operation, the radioactive contaminants contained in the air sequentially pass through the E- filter 161, the HEPA filter 162 and the charcoal filter 163 .

In the fixed automatic decontamination apparatus 100 according to the present invention, the support 120 supporting the decontamination object rotates during the decontamination operation through the spraying of the dry ice pellets, Since the nozzle 138 can move, an effective decontamination operation can be performed on the entire surface of the decontamination object, and the problem of exposure of the operator to radioactive contaminants during the decontamination operation can be minimized.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

100; Stationary radioactive decontamination equipment
110; Shielding booth 111; door
120; A support 121; Fixed member
122; A rotating plate 123; The rotation-
124; A rotating shaft 125; Driven gear
126; Drive gear 127; Rotation drive motor
130; An injection unit 131; The guide member
132; Slit 133; Traveling member
134; A coupling portion 135; [0050]
136; A rotating screw 137; Driving drive motor
138; An injection nozzle 140; camera
150; A radiation sensor 151; display
160; A filter unit 161; E-filter
162; A HEPA filter 163; Charcoal filter

Claims (6)

A shielding booth having an inner space, a door formed at one side thereof, and an inner and a outer door being closed when the door is closed;
A support part installed inside the shielding booth and supporting the object to be decontaminated;
And a spray unit installed on the inner wall of the shielding booth and spraying dry ice pellets toward the decontamination object placed on the support unit
Fixed radioactive decontamination equipment.
The method according to claim 1,
A camera for photographing the inside of the shielding booth,
And a radiation sensor for measuring a radiation contamination degree inside the shielding booth
Fixed radioactive decontamination equipment.
The method according to claim 1,
Wherein the support portion includes a fixing member for allowing the decontamination object to be rotated to rotate while spraying the dry ice pellet for decontamination operation,
A rotary plate rotatably coupled to an upper portion of the fixing member and having an upper surface to which the object to be decontaminated is seated;
And a rotation driving unit for rotating the rotating plate
Wherein the injection unit is formed on a wall surface of the shielding booth other than a side where the door is formed and a ceiling surface of the shielding booth
Fixed radioactive decontamination equipment.
The method of claim 3,
The spraying unit may include a guide member installed on a wall surface or a ceiling surface of the shielding booth,
A traveling member capable of traveling along the guide member,
A traveling drive unit for moving the traveling member along the guide member,
And a spray nozzle installed on the traveling member and spraying the dry ice pellet toward the decontamination object placed on the support portion
Fixed radioactive decontamination equipment.
The method according to claim 1,
Further comprising a filter unit communicating with the inside of the shielding booth and filtering the contaminants contained in the air discharged from the shielding booth after the decontamination operation.
Fixed radioactive decontamination equipment.
6. The method of claim 5,
Characterized in that the filter unit comprises a Hepa filter and a Charcoal filter.
Fixed radioactive decontamination equipment.
KR1020150070264A 2015-05-20 2015-05-20 Automatic radioactive decontamination apparatus KR101720859B1 (en)

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KR1020150070264A KR101720859B1 (en) 2015-05-20 2015-05-20 Automatic radioactive decontamination apparatus

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Application Number Priority Date Filing Date Title
KR1020150070264A KR101720859B1 (en) 2015-05-20 2015-05-20 Automatic radioactive decontamination apparatus

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KR20160136589A true KR20160136589A (en) 2016-11-30
KR101720859B1 KR101720859B1 (en) 2017-03-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102337261B1 (en) * 2021-02-18 2021-12-09 (주)코라솔 processing method and system for waste wire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5584706A (en) 1978-12-15 1980-06-26 Shinko Electric Co Ltd Vibration conveyor
KR100583142B1 (en) 2003-10-31 2006-05-23 한국전력공사 Physical decontamination system for radioactive contaminated objectives
KR100638400B1 (en) 2004-11-30 2006-10-26 하나검사기술 주식회사 Radioactive contaminant decontamination device
KR100925481B1 (en) * 2009-07-08 2009-11-06 선광원자력안전(주) An automatic decontamination equipment for lead blanket of nuclear power plant
KR101407706B1 (en) * 2014-03-05 2014-06-13 선광원자력안전(주) Decontamination Apparatus for Radioactive Waste Using High Pressure Water Jet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5584706A (en) 1978-12-15 1980-06-26 Shinko Electric Co Ltd Vibration conveyor
KR100583142B1 (en) 2003-10-31 2006-05-23 한국전력공사 Physical decontamination system for radioactive contaminated objectives
KR100638400B1 (en) 2004-11-30 2006-10-26 하나검사기술 주식회사 Radioactive contaminant decontamination device
KR100925481B1 (en) * 2009-07-08 2009-11-06 선광원자력안전(주) An automatic decontamination equipment for lead blanket of nuclear power plant
KR101407706B1 (en) * 2014-03-05 2014-06-13 선광원자력안전(주) Decontamination Apparatus for Radioactive Waste Using High Pressure Water Jet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102337261B1 (en) * 2021-02-18 2021-12-09 (주)코라솔 processing method and system for waste wire
WO2022177276A1 (en) * 2021-02-18 2022-08-25 (주)코라솔 Method and system for waste wire treatment

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