KR101663153B1 - Sampling Device from Radioactive Waste Resin and Sampling Method Therewith - Google Patents

Sampling Device from Radioactive Waste Resin and Sampling Method Therewith Download PDF

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Publication number
KR101663153B1
KR101663153B1 KR1020160108860A KR20160108860A KR101663153B1 KR 101663153 B1 KR101663153 B1 KR 101663153B1 KR 1020160108860 A KR1020160108860 A KR 1020160108860A KR 20160108860 A KR20160108860 A KR 20160108860A KR 101663153 B1 KR101663153 B1 KR 101663153B1
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South Korea
Prior art keywords
sample
connecting rod
sample collecting
hole
waste water
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KR1020160108860A
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Korean (ko)
Inventor
조준호
최영구
박규태
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주식회사 선광티앤에스
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • 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
    • G21F9/28—Treating solids
    • G21F9/30—Processing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N2001/1031—Sampling from special places
    • G01N2001/1043—Sampling from special places from sewers

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The present invention relates to a device and a method to collect a radioactive waste resin sample. The device includes: a fixing frame (10) made of a metal material and installed on the upper surface of a waste resin storage (1); a support (20) installed in the upper part of the fixing frame (10), having a staple-shape with an opened bottom by comprising a pair of vertical bars fixed to the upper surface of the fixing frame (10), and a horizontal bar connecting upper parts of the vertical bars with each other, and including a fixing clamp (21) in the center of the horizontal bar; a plurality of connection rods (30) installed in the fixing clamp (21) in a vertical direction; and a sample collecting unit (40) combined with the bottom of the connection rods (30). The sample collecting unit (40) includes: a unit body (41) including a hollow part (41A) inside, a sample collection hole (41B) formed on the outer upper surface to be connected to the hollow part (41A), and a drainage hole (41C) formed on the outer lower surface to be connected to the hollow part (41A); a shielding plate (42) of which an end is combined with the unit body (41) through a hinge to open or close the sample collection hole (41B); and a mesh (43) installed in the drainage hole (41C). Therefore, the present invention is capable of conveniently and safely collecting samples for the analysis of waste resin stored in the waste resin storage.

Description

[0001] The present invention relates to a radioactive wastewater sampling device and a sampling method for the same.

More particularly, the present invention relates to a radioactive wastewater sampling device and a method for collecting radioactive wastewater which are stored in a waste water reservoir And more particularly, to a radioactive wastewater sample collection apparatus and a sample collection method using the same.

In the process of operating a nuclear power plant, various kinds of radioactive materials (nuclides) are generated. These radioactive materials are removed by a suitable eliminator. Especially, C-14 is a moderator of heavy water reactors, Which is adsorbed and removed by ion exchange resin.

If the concentration of C-14 in the waste ion exchange resin is higher than the prescribed disposal limit in the waste ion exchange resin (hereinafter referred to as "wastewater") produced by the above process, It is difficult to treat by the treatment method, and it is currently being stored and managed in the form of a waste water mixture in a large-sized storage tank. Accordingly, development of a technique capable of effectively removing C-14 from a waste water mixture has been actively carried out .

The effective removal of C-14 contained in the radioactive waste water mixture can ensure that the disposal safety is ensured if the disposal requirements specified in the treatment regulations, etc. are met, so that the waste water mixture can be disposed of by itself in accordance with prescribed procedures, The amount of radioactive material (C-14) contained in the waste water mixture should be analyzed first through sample analysis.

Therefore, it is required to develop a sampling device and a sampling method that can easily and safely collect samples for analysis from a radioactive waste water mixture (hereinafter referred to as "radioactive waste water").

KR 10-2011-0116428 A KR 10-0739855 B1 KR 10-2014-0090118 A KR 10-0742639 B1

Accordingly, it is an object of the present invention to provide a radioactive wastewater sampling apparatus and a sample collection method capable of easily and safely collecting a sample for analysis of radioactive wastes generated during operation of a nuclear power plant and stored in a storage room from wastewater. have.

An object of the present invention is to provide a sample collection apparatus comprising: a stationary frame made of a metal material and installed on an upper surface of a waste water storage tank; A pair of vertical bars provided on the upper side of the stationary frame and fixed to the upper surfaces of the opposite faces of the stationary frame respectively and horizontal bars connecting the upper ends of the pair of vertical bars horizontally, A support having a shape of a letter shape and provided with a fixing clamp at the center of the horizontal bar; A plurality of connecting rods installed vertically in the stationary clamp; And a sample collecting unit coupled to a lower end of the connecting rod. The sample collecting unit has a hollow portion formed therein. A sample collecting hole communicating with the hollow portion is formed on an outer circumferential surface of the upper portion. A drain hole communicating with the hollow portion is formed on an outer circumferential surface of the lower portion. A formed unit main body; A shield plate whose one end is coupled to the unit body by a hinge so as to open and close the sample collecting hole; And a mesh network installed in the drainage hole.

The present invention is characterized in that the mesh network is installed in two layers.

The present invention is also characterized in that a conical protrusion is provided at the lower end of the unit body, and a coupling portion having a groove formed at the upper end thereof and having an inner peripheral surface formed with threads is further provided.

In addition, the present invention provides a connecting rod comprising: a connecting rod body having a cylindrical connecting rod; A first engaging portion protruding from a lower end of the connecting rod body and having a thread formed on an outer circumferential surface thereof; And a second engaging portion formed at the upper end of the connecting rod body in a groove shape and having a thread on an inner peripheral surface thereof.

It is another object of the present invention to provide a method for collecting a sample of a radioactive waste water of the present invention, which comprises the steps of: sealing a device which is difficult to decontaminate using a vinyl wrap material so as to prevent contamination; A preparation step of preparing a closed sample transport container; An analytical manhole cover installing step of installing an analytical manhole cover having a sample collecting lid in a state where the manhole cover of the waste water storage is removed; A sample collecting device installing step of coupling a connecting rod and a sample collecting unit to a fixing clamp installed on a support frame of the stationary frame in a state where the stationary frame of the sample collecting device is seated on the upper part of the manhole cover for analysis; The sample collecting lid of the analysis manhole cover is opened and the lower end of the connecting rod is inserted into the sample collecting hole located at the lower part of the sample collecting lid, And the connecting rod and the sample collecting unit are rotated together in the clockwise or counterclockwise direction to descend into the waste water reservoir through the sample collecting hole. When the sampling unit reaches the predetermined depth, the connecting rod is rotated in the opposite direction A sample collecting step of collecting an analytical sample from a radiation waste reservoir through a sample collecting well; After a suitable amount of the sample is sampled by the sampling step, the sampling device installed on the upper part of the waste water reservoir is removed, and the analysis manhole cover installed on the upper part of the sampling hole is removed. Then, And closing the manhole cover so as to close the manhole cover.

The present invention is characterized in that a sample collecting unit is provided with a hollow portion formed therein and a collecting hole communicating with the hollow portion on an upper outer circumferential surface thereof and a drain port communicating with the hollow portion on a lower outer circumferential surface thereof; A shield plate whose one end is coupled to the unit body by a hinge so as to open and close the sample collecting hole; And a mesh network installed in the drainage hole.

By using the sample collecting apparatus according to the present invention, it is possible to collect the sample easily and safely by collecting the analytical sample from the waste paper stored in the waste water reservoir of the heavy water channel.

In the present invention, the shielding plate installed in the sample collecting hole is operated by the rotation direction of the sample collecting unit, so that the sample collecting hole is opened and closed. Therefore, when the sample is taken, the sample collecting unit is lowered to a desired depth, The sample for analysis can be accurately collected at a predetermined height by rotating the sample collection unit in the air opening direction.

Further, since the connecting rod is assembled and used in multiple stages, the sampling operation can be easily performed without securing a sufficient space between the waste water storage tank and the ceiling at the work site. Also, .

FIG. 1 is a perspective view showing an example of a radioactive waste collection apparatus according to the present invention,
FIG. 2 is a flowchart showing a method of collecting a sample of a radioactive waste solution according to the present invention,
3 is a perspective view showing an example of a connecting rod according to the present invention,
4 and 5 are perspective views showing an example of a sample collecting rod according to the present invention,
6 (a) and 6 (b) are diagrams showing an operation state of an operation example in which the shielding plate of the sample collecting rod according to the present invention is opened and closed,
7 to 9 are use state diagrams showing an example in which the apparatus for collecting the radioactive waste water according to the present invention is used.

Hereinafter, the structure and operation of the present invention will be described in more detail with reference to the accompanying drawings showing preferred embodiments.

An object of the present invention is to provide a radioactive waste collection apparatus and a sample collection method capable of easily and safely collecting an analysis sample from a radioactive waste paper generated during operation of a nuclear power plant and stored in a storage space. Includes a stationary frame 10, a support 20, a connecting rod 30, and a sample collection unit 40 as shown in Fig.

The radioactive waste water mixture is stored in a large-scale rectangular-shaped large-capacity (200 m3, height 4.65 m) waste water storage tank 1. A square manhole 1A having a size of approximately 90 cm x 90 cm is formed on the upper surface of the waste water storage tank 1, In the present invention, a stationary frame 10 in the form of a square frame having four metal rods or metal round rods connected by welding or the like is installed on the upper surface of the manhole 1A so that the sample collecting apparatus 3 can be seated thereon And the connecting rod 30 and the sample collecting unit 40 provided on the upper part of the fixed frame 10 are supported by the fixed frame 10 by the installation structure of the fixed frame 10, So that a stable sample collection operation can be achieved. The function and structure of the connecting rod 30 and the sample collecting unit 40 will be described later.

The size of the fixed frame 10 is appropriately sized in consideration of the size of the manhole 1A formed on the upper surface of the waste water storage tank 1. [

When the fixed frame 10 is installed on the upper part of the manhole 1A of the waste water storage tank 1 on the bottom surface of the corner of the fixed frame 10 having four frame shapes, (Not shown) so that the height adjustment members can be easily adjusted. At this time, the height adjustment members are vertical bars positioned on the bottom of the corner of the fixed frame 10, respectively, The outer surface of the vertical bar is provided with a screw member having a knob on one side thereof for adjusting the installation height of the vertical bar, and the non-slip member is formed of a friction member such as a rubber plate.

When the fixed frame 10 having the above structure is installed on the upper portion of the manhole 1A formed in the waste water storage tank 1, the manhole cover (not shown) is removed from the manhole 1A as shown in FIG. Next, the analytical manhole cover 2 is placed at that position and the fixed frame 10 is placed on the upper portion of the manhole 1A. In the present invention, the fixed frame 10 is formed into a rectangular frame shape Even if a handle, a lid 2B or the like is protruded upward from the upper surface of the manhole cover 2 for analysis, it can be stably installed on the upper surface of the waste water storage tank 1 regardless of these.

A support base 20 having a predetermined height to support a connection rod 30 to be described later is installed on the upper side of the quadrangular fixed frame 10, A vertical bar (not shown) fixed to the upper surfaces of two opposite sides of the four sides of the fixed frame 10, and a horizontal bar (not shown) horizontally connecting the upper ends of the pair of vertical bars Quot; C "shape in which the lower portion is opened.

A fixing clamp 21 is provided at the center of the horizontal bar so as to surround and fix the outer circumferential surface of the connecting rod 30. For this purpose, the fixing clamp 21 is formed by a pair of C- And a screw member having a handle at one end thereof is provided at the other end opposite to the other end in a state in which they are opposed to each other.

When the fixing clamp 21 is installed at the center of the horizontal bar, a thread is formed at one end so as to adjust its installation angle in the left and right direction, so that it is installed by screwing the horizontal bar. Thereby preventing the installation angle of the fixing clamp 21 from changing after the installation.

A connecting rod 30 having a structure capable of being folded or unfolded in multiple stages is installed vertically in a fixed clamp 21 provided on a support base 20. The connecting rod 30 is used to connect a sample collecting rod 40, The connecting rod 30 of the present invention has a cylindrical connecting rod body 31 as shown in Fig. 3, and a connecting rod body 31 at the lower end of the connecting rod body 31 And a second engaging portion 33 having a groove on the inner circumferential surface and formed at the upper end of the connecting rod body 31. In this case, the connecting rod 30 The female thread and the male thread of the first and second engaging portions 32 and 33 formed at both ends of the connecting rod 30 are processed to the same standard so that the plurality of connecting rods 30 can be assembled in multiple stages.

A coupling hole 34 communicating with the second coupling portion 33 is formed near the upper end of the coupling rod body 31. A screw 35 is fastened to the coupling hole 34. [

When the plurality of connecting rods 30 are connected by assembly, a handle 50 of a "T" shape is assembled to the connecting rod 30 located at the uppermost position as shown in FIG. Another connecting rod 30 is attached to the second engaging portion 33 formed at the upper end of the fixed connecting rod 30 in a state where one connecting rod 30 is fixed to the fixing clamp 21 of the support 20 by the structure, The plurality of connecting rods 30 are connected to each other and the length of the connecting rods 30 is extended by the length of one connecting rod 30. [

After the plurality of connecting rods 30 are connected by the above process, the screws 35 are inserted into the connecting holes 34 formed in the outer circumferential surfaces of the connecting rods 30, Even if the connecting rod 30 is rotated in the clockwise or counterclockwise direction, the coupling between the connecting rods 30 coupled by the screw method is not released, and the initial coupling state is firmly maintained.

When the connecting rod 30 is fixed to the support base 20, the screw member attached to one end of the fixing clamp 21 is loosened and one connecting rod 30 is fixed to the fixing base 20 in a state in which one end of the fixing clamp 21 is fully opened. The connecting rod 30 is fixed to the fixing clamp 21 when the screw member is tightened with one end of the fixing clamp 21 being closed by screwing the screw member into the fixing clamp 21, The connecting rod 30 can be freely rotated or lifted and lowered while maintaining the restraint state of the connecting rod 30 as it is.

A sample collecting unit 40 is coupled to the lower end of the connecting rod 30 located at the lowermost one of the plurality of connecting rods 30 to collect the waste paper stored in the waste water collecting container 1. For this purpose, 4 and 5, the sample collecting unit 40 has a hollow portion 41A formed therein and a sample collecting hole 41B communicating with the hollow portion 41A is formed on the outer peripheral surface of the upper portion, A unit body 41 in the form of a hollow rod in which a drain hole 41C communicating with the hollow portion 41A is formed on the outer circumferential surface of the lower portion of the unit body 41, (Not shown) protruding outward in the tangential direction of the cylindrical unit body 41 while being formed along the vertical edge of the sample collecting hole 41B at the other end, And a mesh network 43 installed in the drain hole 41C.

A conical guide member 44 is provided at the lower end of the unit main body 41 so that the sample collecting unit 40 can be easily lowered into the waste water storage tank 1, 1 engaging portion 32. The engaging portion 45 is formed with a thread on the inner circumferential surface thereof.

A mesh network 43 is provided in the drainage hole 41C formed in the lower outer circumferential surface of the sample collecting unit 40 so as not to allow the sample in the sample collecting unit 40 to escape during drainage. When the mesh network 43 is installed in the drainage hole 41C, the mesh network 43 having an eye size of 40 mm or less is provided in two layers, Are installed so that the eyes of the mesh network are staggered from each other.

When the sample collecting unit 40 is rotated in either the clockwise or counterclockwise direction by the structure of the sample collecting unit 40 as described above, The resistance of the waste paper stored in the inside of the unit main body 41 acts on the shielding plate 42 to close the shielding plate 42 so that the sample collecting hole 41B formed in the unit body 41 is closed.

On the other hand, when the sample collecting unit 40 is rotated in the opposite direction from the upper direction, the resistance of the waste paper stored in the waste water storage tank 1 along the edge of the sample collecting hole 41B as shown in FIG. 6 (b) The shielding plate 42 is opened by the protrusion projecting outwardly so that the sample collecting hole 41B formed in the unit body 41 is opened.

When the sample collecting rod 40 is continuously rotated in the same direction while the sample collecting hole 41B of the sample collecting unit 40 is opened, the waste water is discharged from the inside of the unit body 41 through the opened sample collecting hole 41B And the sample is collected.

After the appropriate amount of waste resin sample is collected by the above process, the connecting rod 30 is raised to collect the sample collecting unit 40. At this time, when the connecting rod 30 is rotated while being rotated in the direction opposite to the downward direction, The shield plate 42 is kept closed by the resistive force of the waste water reservoir 1 and is prevented from collecting the waste paper of different height and the collected sample existing in the sample collecting unit 40 taken out of the waste water reservoir 1 is discharged to the outside Is prevented.

In the meantime, a large amount of water is contained in the waste water storage tank 1 together with the waste water. Therefore, in the process of collecting the sample collecting unit 40, water is introduced into the hollow portion 41A, Only the waste water component remains in the sample collecting unit 40. Since the mesh network 43 is provided in two layers in the drainage hole 41C, Even if the paper is broken finely, it is not discharged to the outside by the mesh net 43 but remains inside the sample collecting unit 40.

Hereinafter, a method of collecting a sample from a waste water mixture stored in a waste water reservoir using the sample collecting apparatus 3 of the present invention will be described. The sampling method of the present invention is shown in FIG. 2 The manhole cover installation step S200, the sample collection installation step S300, the sample collection step S400, the sample collection device removal step S500, and the analysis manhole cover installation step (step S100) S600).

(1) preparation step (S100)

In this step, before the sample of the radioactive waste stored in the waste water storage tank 1 is collected, equipment which is difficult to decontaminate is moved to another place or is sealed by using a material such as a vinyl lap to prevent contamination, And a closed sample transport container for transporting the collected sample.

(2) Manhole cover installing step for analysis (S200)

This step is to remove the manhole cover 2 from the upper surface of the waste water storage tank 1 and open the manhole 1A as shown in FIG. 7 when the sample preparation is completed by the preparation step S100 Next, an analysis manhole cover 2 having a sample collecting hole 2A formed at its center is installed on the upper part of the manhole 1A. In this way, the analysis of the manhole cover 2 in place of the manhole cover 2 The size of the sample collecting hole 2A is much smaller than that of the manhole 1A. Therefore, when the manhole cover 2A is used for a long time, a relatively large area of the manhole 1A is opened The amount of radiation exposure can be greatly reduced.

(3) Sampling device installation step (S300)

This step is carried out as follows. After the analysis manhole cover 2 is installed on the upper part of the manhole 1A by the above-described manhole cover installing step (S200), the analysis manhole cover 2 The connecting rod 30 and the sample collecting unit 40 are fixed to the stationary frame 10 by using the stationary clamp 21 mounted on the support 20 of the stationary frame 10, So that the sample collecting apparatus 1 of the present invention is fixed to the upper portion of the manhole 1A.

(4) Sampling step (S400)

9, after the sample collecting apparatus 1 is fixed to the upper portion of the manhole 1A by the sample collecting apparatus installing step (S300), the sample collecting apparatus 1 of the analysis manhole cover 2, The lid 2B is opened and the lower end of the connecting rod 30 is inserted into the sample collecting hole 2A and another connecting rod 30 corresponding to the required length is connected to the upper end of the connecting rod 30 The connecting rod 30 and the sample collecting unit 40 are rotated together in either the clockwise or counterclockwise direction to descend into the waste water storage tank 1 through the sample collecting hole 2A, When the unit 40 reaches a predetermined depth, rotating the connecting rod 30 in the direction opposite to the rotating direction at the time of descending, thereby collecting the analytical sample from the radiation storage pool 1, ), As described above, When the sample collecting unit 40 is rotated in the direction opposite to the rotating direction at the time of descent because the shielding plate 42 covering the sample collecting hole 41B is opened and closed, an appropriate amount of sample is collected in the sample collecting hole 41B To the hollow portion 41A.

When the connecting rod 30 is lowered and the upper end of the connecting rod 30 comes close to the fixing clamp 21, the connecting rod 30 is tightly fixed by fastening the screw of the fixing clamp 21, The first engaging portion 32 of another connecting rod 30 is connected to the second engaging portion 33 formed on the connecting rod 30 by screwing. The other connecting rod 30 is connected to the upper end of the connecting rod 30 by screwing to lower the connecting rod 30, the length of the connecting rod 30 is increased and the connecting rod 30 having the required length is connected to the sampling unit 40.

 The total length of the sample collecting unit 40 can be approximately calculated by the length and the number of the connecting rods 30 and the length (depth) of the sample collecting unit 40 flowing into the sample collecting hole 2A is It is preferable that a scale for measuring the length is provided on the outer circumferential surface of the connecting rod 30 so as to be able to measure more accurately.

As described above, in the present invention, even when the space between the waste water storage tank 1 and the ceiling of the building is not sufficiently secured by sequentially assembling and using a plurality of connecting rods 30 while descending the sample collecting unit 40 The sample collecting unit 40 can be easily installed in the sample collecting apparatus 3 and the analytical sample can be collected at the accurate depth of the waste water reservoir 1.

(5) Sampling device removing step (S500)

In this step, after a suitable amount of the sample is sampled by the sampling step (S400), the connecting rod 30 is raised to collect the sample collecting unit 40 and remove it from the sample collecting apparatus 3, A step of removing the sample collecting device 3 provided on the upper part of the reservoir 1 and separating the connecting rod 30 positioned on the upper side while raising the connecting rod 30 when recovering the sample collecting unit 40, When the lower end of the sample collecting unit 40 inserted into the sample collecting hole 2A is positioned outside the sample collecting hole 2A, the sample collecting hole 2B is covered to close the sample collecting hole 41B, 41B, the connecting rod 30 is raised and rotated in either direction so that the sample collected when the shielding plate 42 is closed is discharged to the outside of the hollow portion 41A Is effectively prevented.

Once all of the above steps are completed, the analytical sample collected in the sample collecting unit 40 is transferred to a closed type transport container, and the equipment used for sampling and the surrounding are decontaminated.

As described above, the present invention can easily and safely collect a radioactive analysis sample from a waste water mixture stored in a waste water reservoir using a sample collection device.

1: waste water reservoir 1A: manhole
1B: Manhole cover 2: Manhole cover for analysis
2A: Sample collecting lid 3: Sampling device
10: stationary frame 20: support
21: Fixing clamp 30: Connecting rod
31: connecting rod body 32: first engaging portion
33: second engaging portion 34: fastening hole
35: Screw 40: Sampling unit
41: Unit body 41A:
41B: Sampling hole 41C: Drainage hole
42: shielding plate 43: mesh network
44: guide member 45:
50: Handle

Claims (6)

A radioactive waste water sampler for safely sampling analytical samples from radioactive waste paper stored in a waste water reservoir of a nuclear power plant,
The radioactive waste collection unit includes a stationary frame 10 made of a metal material and installed on the upper surface of the waste storage 1;
A pair of vertical bars installed on the upper side of the fixed frame 10 and fixed to the upper surfaces of the opposite faces of the fixed frame 10 respectively, (20) having a " C "shape with its bottom opened and having a fixing clamp (21) at the center of the horizontal bar;
A plurality of connecting rods 30 installed vertically in the fixed clamp 21;
And a sample collecting unit (40) coupled to the lower end of the connecting rod (30)
The sample collecting unit 40 has a hollow portion 41A formed therein and a sample collecting hole 41B communicating with the hollow portion 41A is formed on the outer circumferential surface of the upper portion and the hollow portion 41A A unit body 41 having a drain hole 41C communicating with the drain hole 41C; A shield plate (42) having one end coupled to the unit body (41) by a hinge so as to open and close the sample collecting hole (41B); And a mesh network (43) installed at the drain hole (41C).
The method according to claim 1,
Wherein the mesh network (43) is installed in two layers in a stacked manner.
The method according to claim 1,
Characterized in that a conical protrusion (44) is provided on the lower end of the unit body (41), and a coupling part (45) having a groove on the inner circumferential surface and having a groove is formed on the upper end thereof. .
The method according to any one of claims 1 to 3,
The connecting rod 30 has a cylindrical connecting rod body 31; A first engaging portion 32 protruding from a lower end of the connecting rod body 31 and having a thread on an outer circumferential surface thereof; And a second coupling part (33) formed in a groove shape on an upper end of the connecting rod body (31) and having a thread on an inner peripheral surface thereof.
A method of collecting a sample of radioactive wastewater for safely collecting analytical sample from a radioactive waste paper stored in a waste water reservoir of a nuclear power plant,
The method for collecting the radioactive waste water is characterized by comprising the steps of: preparing a closed-type sample transport container (S100) for enclosing equipment which is difficult to decontaminate by using a vinyl wrap material so as to prevent contamination and safely transporting the collected sample; Wow;
An analysis manhole cover installing step (S200) for installing an analysis manhole cover (2) provided with a sample collection hole cover (2A) in a state where the manhole cover (1B) of the waste water storage tank (1) is removed;
The connecting rod 30 is attached to the fixing clamp 21 provided on the support base 20 of the fixed frame 10 while the fixed frame 10 of the sample collecting device 3 is seated on the upper part of the manhole cover 2 for analysis And a sample collecting unit (40);
The sample collecting lid 2B of the manhole cover 2 for analysis is opened and the lower end of the connecting rod 30 is inserted into the sample collecting hole 41B located below the sample collecting lid 2B Another connecting rod 30 corresponding to a required length may be connected to the upper end of the connecting rod 30 to connect the connecting rod 30 and the sample collecting unit 40 together in a clockwise or counterclockwise direction And then descends to the inside of the waste water storage tank 1 through the sample collecting hole 41B while rotating the connecting rod 30 in the direction opposite to the direction of descending when the sampling unit 40 reaches a predetermined depth, A sample collection step (S400) of sampling an analytical sample from the radioactive waste storage tank (1) through the sample collection hole (41B) by rotating the sample;
After a proper amount of the sample is sampled by the sample collection step S400, the sample collection device 3 installed on the upper part of the waste water storage tank 1 is removed, and the sample collection device 3 installed on the upper part of the sample collection hole 41B (S500) for removing the manhole cover (2) and closing the manhole cover (1B) at a position where the analysis manhole cover (2) is removed to seal the same. Collection method.
The method of claim 5,
The sample collecting unit 40 has a hollow portion 41A formed therein and an upper peripheral surface formed with a collecting hole 41B communicating with the hollow portion 41A and communicating with the hollow portion 41A on a lower outer peripheral surface thereof. A unit body 41 having a drain hole 41C formed therein; A shield plate (42) having one end coupled to the unit body (41) by a hinge so as to open and close the sample collecting hole (41B); And a mesh network (43) installed in the drain hole (41C).
KR1020160108860A 2016-08-26 2016-08-26 Sampling Device from Radioactive Waste Resin and Sampling Method Therewith KR101663153B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109406207A (en) * 2018-11-12 2019-03-01 中核四川环保工程有限责任公司 A kind of Spent Radioactive liquid storage tank radioactive deposite sampling system and its application method
KR102612620B1 (en) * 2023-04-27 2023-12-12 윤승현 Fixing apparatus for sewage suction hose of automatic sewage sampler

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