CN111220428A - Multi-channel test device for sampling radioactive aerosol and gaseous iodine - Google Patents
Multi-channel test device for sampling radioactive aerosol and gaseous iodine Download PDFInfo
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- CN111220428A CN111220428A CN202010114990.7A CN202010114990A CN111220428A CN 111220428 A CN111220428 A CN 111220428A CN 202010114990 A CN202010114990 A CN 202010114990A CN 111220428 A CN111220428 A CN 111220428A
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- gaseous iodine
- aerosol
- branch pipe
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- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052740 iodine Inorganic materials 0.000 title claims abstract description 45
- 239000011630 iodine Substances 0.000 title claims abstract description 45
- 238000005070 sampling Methods 0.000 title claims abstract description 44
- 239000000443 aerosol Substances 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 10
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001179 sorption measurement Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 claims description 2
- 238000007837 multiplex assay Methods 0.000 claims 4
- 238000005086 pumping Methods 0.000 claims 3
- 239000003463 adsorbent Substances 0.000 claims 2
- 238000003556 assay Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
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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
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
-
- 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
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Dispersion Chemistry (AREA)
- Measurement Of Radiation (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a multi-path test device for sampling radioactive aerosol and gaseous iodine, which comprises an air exhaust mechanism and a plurality of parallel sampling air paths connected with the air exhaust mechanism, wherein each sampling air path comprises a sample clamp, a sample inlet branch pipe and a sample outlet branch pipe, aerosol filtering materials and gaseous iodine adsorbing materials to be tested are filled in the sample clamp, one end of the sample clamp is provided with an air inlet, the other end of the sample clamp is provided with an air outlet, the air inlet is connected with the sample inlet branch pipe, the air outlet is connected with the sample outlet branch pipe, and the sample outlet branch pipe is connected with the air exhaust mechanism. The device continuously introduces gas in a place through the suction effect of the air exhaust mechanism and flows through the test device loaded with the high-efficiency filter material for filtering aerosol and the iodine adsorber filter material for adsorbing gaseous iodine, so that the sampling test and the aging test under the same operation condition with the high-efficiency filter and the iodine adsorber in the system are realized, and the device is small in size, convenient to carry and capable of simultaneously carrying out parallel multipath tests.
Description
Technical Field
The invention relates to a gas sampling device of nuclear facilities such as a nuclear power station and the like, in particular to a multi-path test device for sampling radioactive aerosol and gaseous iodine.
Background
Ventilation purification systems for nuclear facilities such as nuclear power plants generally use high efficiency filters to filter radioactive aerosols in air or gas, and use iodine adsorbers to adsorb radioactive gaseous iodine. After the high-efficiency filter and the iodine adsorber are installed on the system, the performance of the high-efficiency filter and the iodine adsorber is gradually reduced along with the change of time and operating conditions, and in order to study the performance change rule of the high-efficiency filter and the iodine adsorber in the use process more carefully, the gas in the system needs to be extracted at the same flow rate so as to achieve the purpose of sampling the gas or synchronously verify the aging effect of the gas in the use process.
In addition, in atmospheric environments and nuclear facility sites, especially in nuclear accident situations, it is often necessary to sample the atmosphere in the natural environment or site environment for a certain period of time to analyze the activity of radioactive aerosols and gaseous iodine in the environment. The performance of an efficient filter and an iodine adsorber of a ventilation and purification system of nuclear facilities such as a nuclear power station and the like is generally detected on line every 12 months or 18 months after the efficient filter and the iodine adsorber are installed on the system at present, how the performance changes in the process cannot be actually detected or simulated, particularly, a test is not carried out on the performance verification of the two equipment purification materials by a related test device, and a multi-path test device for sampling radioactive aerosol and gaseous iodine is needed to be found out to solve the technical problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a multi-path test device for sampling radioactive aerosol and gaseous iodine.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a multichannel test device for sampling of radioactive aerosol and gaseous iodine, includes air exhaust mechanism, and a plurality of parallelly connected sample gas circuits of being connected with air exhaust mechanism, sample gas circuit include the sample anchor clamps, advance kind branch pipe and go out kind branch pipe, and the inside of sample anchor clamps is filled aerosol filtering material and the gaseous iodine adsorption material that needs the experiment, and the one end of sample anchor clamps has the air inlet, and the other end has the gas outlet, and the air inlet is connected and is advanced kind branch pipe, and the gas outlet is connected out kind branch pipe, goes out kind branch union coupling air exhaust mechanism.
Further, a flowmeter and a two-way ball valve are arranged on the sample outlet branch pipe, and the flowmeter is preferably a mass flowmeter.
Further, the air suction mechanism is a device for providing negative pressure suction.
Further, the air exhaust mechanism is a venturi ejector or a vacuum pump.
Furthermore, the sample clamp comprises sample section, sample seal section, reducing head, quick connector, through pressing from both sides tight type fast-assembling clamp connection between the sample section, through fastener threaded connection or full weld connection between reducing head and the sample seal section, quick connector threaded mounting is in the reducing head other end, quick connector installs the sampling branch pipe of different length.
Further, the end of the sample introduction branch pipe is arranged in an environment needing sampling or an access system.
Further, the mass flow meter controls the flow rate of the sampling gas circuit to reach the same flow rate as that of the purifying equipment.
Furthermore, the aerosol filter material and the gaseous iodine adsorption material comprise an aerosol filter material made of glass fiber and a gaseous iodine adsorption material made of activated carbon fiber or other activated carbon particles.
The invention has the beneficial effects that: the device continuously introduces gas in a place through the suction effect of the air exhaust mechanism and flows through a test device loaded with an efficient filter material for filtering aerosol and an iodine adsorber filter material for adsorbing gaseous iodine, so that a sampling test and an aging test under the same operation conditions with the efficient filter and the iodine adsorber in the system are realized, and the device can be used for gas sampling in various place environments, collecting radioactive aerosol and gaseous iodine in the gas and aging verification of the aerosol filter material and a gaseous iodine adsorption material; the device is small in size and convenient to carry, and can simultaneously carry out parallel multipath tests.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the appearance of the sample holder according to the present invention;
FIG. 3 is a schematic longitudinal cross-sectional view of a sample holder according to the present invention.
Detailed Description
As shown in figure 1, a multichannel test device for sampling radioactive aerosol and gaseous iodine, including air exhaust mechanism 1, a plurality of parallelly connected sample gas circuits of being connected with air exhaust mechanism 1, the sample gas circuit includes sample anchor clamps 2, advance appearance branch pipe 3 and play appearance branch pipe 4, the inside of sample anchor clamps 2 is filled and is needed experimental aerosol filtering material and gaseous iodine adsorption material, the one end of sample anchor clamps 2 has the air inlet, the other end has the gas outlet, the air inlet is connected and is advanced appearance branch pipe 3, a kind branch pipe 4 is connected to the gas outlet, play appearance branch pipe 4 connects air exhaust mechanism, advance appearance branch pipe 3 and play appearance branch pipe 4 and can adopt the connected mode of inserting soon to connect sample anchor clamps 2, make things convenient for advance appearance branch pipe 3 and play appearance branch pipe 4 dismouting.
The sampling branch pipe 4 is provided with a mass flow meter 5 and a two-way ball valve 6, and the mass flow meter 5 controls the flow rate of the sampling gas circuit to reach the same flow rate as that of the purifying equipment. The suction mechanism 1 is a device that provides a negative pressure suction effect. The air extraction mechanism may be embodied as a venturi ejector or a vacuum pump.
The aerosol filter material and the gaseous iodine adsorption material comprise the aerosol filter material made of glass fiber and the gaseous iodine adsorption material made of activated carbon fiber or other activated carbon particles.
Further, the end of the sample introduction branch pipe 3 is placed in an environment or an access system which needs to be sampled.
As shown in fig. 2 and fig. 3, the sample clamp 2 is composed of a sample section 21, a sample sealing section 29, a reducing seal head 22 and a quick connector 23, the sample sections 21 are connected through a clamping type quick-assembling clamp 24, the reducing seal head 22 and the sample sealing section 29 are in threaded connection or full-welding connection through a fastener 25, the quick connector 23 is in threaded installation at the other end of the reducing seal head 22, and the quick connector 23 can be provided with sampling branch pipes 3 with different lengths as required to realize the sampling of the environmental gases in sampling places with different distances.
The aerosol filtering material 27 for collecting radioactive aerosol is a glass fiber high-efficiency filter membrane with the thickness of 0.3mm, and the filtering efficiency is more than 99.99 percent; the gaseous iodine adsorption material 28 for collecting radioactive gaseous iodine is formed by wrapping two layers of thin fiber cloth with activated carbon fibers or fine activated carbon particles soaked with triethylene diamine or similar reagents, and the adsorption efficiency is more than 99.9%.
The reducing seal head 22 is in a circular tubular shape, one end of the reducing seal head is connected with the sample sealing section through threads or full welding, the other end of the reducing seal head is connected with a quick connector 23, the size of an interface of the quick connector 23 can be different in size specification according to the size of sampling flow, and the sampling branch pipe 3 with the corresponding pipe diameter is matched according to the size requirement of the quick connector, so that the sampling of the environmental gas in a sampling place is realized.
The device comprises the following specific operation steps:
(1) the high-efficiency aerosol filtering material and the gaseous iodine adsorbing material to be tested are put into a special sample clamp 2, and the tightness is detected to ensure that the sample clamp has no leakage;
(2) placing the end part of the sample introduction branch pipe 3 in an environment needing sampling or an access system;
(3) a power plug of the air exhaust mechanism 1 (vacuum pump) is connected to a 220V power supply;
(4) the two-way ball valve 6 switches of the 1# path and the 2# path are arranged at an 'on' gear, and a power switch on the vacuum pump is started;
(5) adjusting the mass flowmeter 5 to ensure that the flow rates of the two paths of flow rates reach the same flow rate as that of the purification equipment, and starting sampling;
(6) and after the sampling time reaches the preset time, closing the valve switch of the corresponding gas circuit, and taking down the sample clamp in sequence to further analyze the sample.
The device continuously introduces gas in a place through the suction effect of the air exhaust mechanism 1 and flows through a test device loaded with an efficient filter material for aerosol filtration and an iodine adsorber filter material for gaseous iodine adsorption, so that a sampling test and an aging test under the same operation conditions with the efficient filter and the iodine adsorber in the system are realized, and the device can be used for gas sampling in various place environments, collecting radioactive aerosol and gaseous iodine in the gas, and aging verification of the aerosol filter material and a gaseous iodine adsorption material; the device is small in size and convenient to carry, and can simultaneously carry out parallel multipath tests.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a multichannel test device for sampling of radioactive aerosol and gaseous iodine, includes air exhaust mechanism, a plurality of parallelly connected sample gas circuit of being connected with air exhaust mechanism, its characterized in that, sample gas circuit include sample anchor clamps, advance kind branch pipe and play kind branch pipe, and the inside of sample anchor clamps is filled aerosol filtering material and the gaseous iodine adsorption material that needs the experiment, and the one end of sample anchor clamps has the air inlet, and the other end has the gas outlet, and the air inlet is connected and is advanced kind branch pipe, and the gas outlet is connected out kind branch pipe, goes out kind branch union coupling air exhaust mechanism.
2. The multiplex assay device for radioactive aerosol and gaseous iodine sampling according to claim 1, wherein said sample outlet manifold is provided with a flow meter and a two-way ball valve.
3. A multiplex assay device for radioactive aerosol and gaseous iodine sampling according to claim 1 or 2, wherein said pumping mechanism is a device providing negative pressure pumping action.
4. The multiplex assay device for radioactive aerosol and gaseous iodine sampling according to claim 3, wherein said air pumping mechanism is a venturi ejector or a vacuum pump.
5. The multi-channel testing device for sampling radioactive aerosol and gaseous iodine as claimed in claim 3, wherein the sample holder is composed of a sample section, a sample sealing section, a reducing seal head and a quick-plug connector, the sample sections are connected with each other through a clamping type quick-mounting clamp, the reducing seal head and the sample sealing section are connected with each other through a fastener in a threaded manner or a full-welding manner, the quick-plug connector is mounted at the other end of the reducing seal head in a threaded manner, and the quick-plug connector is mounted with sample inlet branch pipes with different lengths.
6. The multiplex assay device for radioactive aerosol and gaseous iodine sampling according to claim 3, wherein the end of said sample manifold is placed in the environment or access system to be sampled.
7. The multi-channel testing device for radioactive aerosol and gaseous iodine sampling according to claim 2, wherein the mass flow meter controls the flow rate of the sampling gas channel to be the same as that of the purification equipment.
8. The device of claim 1, wherein the aerosol filter material and the gaseous iodine adsorbent material comprise glass fiber aerosol filter material and activated carbon fiber or other activated carbon particles gaseous iodine adsorbent material.
9. The multiplexed assay device for radioactive aerosol and gaseous iodine sampling of claim 2, wherein said flow meter is a mass flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010114990.7A CN111220428A (en) | 2020-02-25 | 2020-02-25 | Multi-channel test device for sampling radioactive aerosol and gaseous iodine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010114990.7A CN111220428A (en) | 2020-02-25 | 2020-02-25 | Multi-channel test device for sampling radioactive aerosol and gaseous iodine |
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| Publication Number | Publication Date |
|---|---|
| CN111220428A true CN111220428A (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010114990.7A Pending CN111220428A (en) | 2020-02-25 | 2020-02-25 | Multi-channel test device for sampling radioactive aerosol and gaseous iodine |
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| CN (1) | CN111220428A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161847A (en) * | 2020-09-28 | 2021-01-01 | 成都西核仪器有限公司 | Aerosol and iodine sampling instrument |
| CN112229772A (en) * | 2020-09-04 | 2021-01-15 | 中国原子能科学研究院 | Radioactive aerosol source preparation system |
| CN113324777A (en) * | 2021-04-26 | 2021-08-31 | 中国辐射防护研究院 | Polymorphic radioactive iodine environment simulation and equipment comprehensive evaluation equipment |
| CN113720659A (en) * | 2021-08-25 | 2021-11-30 | 哈尔滨工程大学 | Gas sampling and filtering device for monitoring hydrogen concentration in containment vessel under severe accident of nuclear power plant |
| CN114002025A (en) * | 2021-10-25 | 2022-02-01 | 华能山东石岛湾核电有限公司 | Radioactive gas sampling device and sampling system |
| CN115931664A (en) * | 2022-12-30 | 2023-04-07 | 无锡学院 | Atmospheric aerosol collecting and detecting device and detecting method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229772A (en) * | 2020-09-04 | 2021-01-15 | 中国原子能科学研究院 | Radioactive aerosol source preparation system |
| CN112161847A (en) * | 2020-09-28 | 2021-01-01 | 成都西核仪器有限公司 | Aerosol and iodine sampling instrument |
| CN113324777A (en) * | 2021-04-26 | 2021-08-31 | 中国辐射防护研究院 | Polymorphic radioactive iodine environment simulation and equipment comprehensive evaluation equipment |
| CN113324777B (en) * | 2021-04-26 | 2024-01-23 | 中国辐射防护研究院 | Polymorphic radioactive iodine environment simulation and equipment comprehensive evaluation equipment |
| CN113720659A (en) * | 2021-08-25 | 2021-11-30 | 哈尔滨工程大学 | Gas sampling and filtering device for monitoring hydrogen concentration in containment vessel under severe accident of nuclear power plant |
| CN114002025A (en) * | 2021-10-25 | 2022-02-01 | 华能山东石岛湾核电有限公司 | Radioactive gas sampling device and sampling system |
| CN114002025B (en) * | 2021-10-25 | 2023-07-11 | 华能山东石岛湾核电有限公司 | Radioactive gas sampling device and sampling system |
| CN115931664A (en) * | 2022-12-30 | 2023-04-07 | 无锡学院 | Atmospheric aerosol collecting and detecting device and detecting method |
| CN115931664B (en) * | 2022-12-30 | 2023-11-17 | 无锡学院 | Atmospheric aerosol collecting and detecting device and detecting method |
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