CN211697392U - Measuring device for scattered aerosol of radioactive powder - Google Patents
Measuring device for scattered aerosol of radioactive powder Download PDFInfo
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- CN211697392U CN211697392U CN201921904466.9U CN201921904466U CN211697392U CN 211697392 U CN211697392 U CN 211697392U CN 201921904466 U CN201921904466 U CN 201921904466U CN 211697392 U CN211697392 U CN 211697392U
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Abstract
The utility model relates to a unrestrained aerosol measuring device of radioactive powder, including box room, the top in box room has radioactive powder sprinkler head, and the top and the side in box room are equipped with a plurality of aerosol sampling subassemblies, and the aerosol sampling subassembly sets up the aerosol sample thief that is connected with the aerosol sample thief including installing the aerosol sample thief hole on box room inner wall in the box room outside, and aerosol sample thief hole department has mechanical valve or electric valve. The radioactive powder scattering aerosol measuring device can determine the spatial distribution of various aerosols according to the experimental purpose, can be provided with disturbed resuspension aerosol concentration, and can also obtain the aerosol concentration caused by no resuspension, thereby realizing the determination of the spatial distribution of the radioactive powder scattering aerosol measuring device, deducting the error introduced by resuspension factors, and increasing the accuracy of measured data and the reliability of an estimation result.
Description
Technical Field
The utility model belongs to the technical field of nuclear facility environmental source item estimation technique and specifically relates to a unrestrained aerosol measuring device of radioactive powder.
Background
When the radioactive powder scattering accident of the nuclear facility is evaluated, the radiation influence of aerosol release caused by the powder scattering accident on the environment and the public needs to be estimated. In order to accurately evaluate the radiation effect of powder scattering accidents, the aerosol release source item is measured. Currently, the laboratory measures the source item of aerosol release by simulating the accident of scattering radioactive powder in a factory. The powder sprinkling device is built in a laboratory box room, a sampling port is not arranged on an exhaust pipe at the top of the laboratory box room, the aerosol sampling port can only be plugged into a glove box from the bottom of the laboratory box room during an experiment, the aerosol concentration is sampled and obtained after the sprinkling experiment is started, and the release amount is estimated by adopting a method of multiplying the air volume by the concentration. Due to the limitation of the experimental device, the arrangement of the sampling opening is too low, so that the powder deposited at the bottom of the chamber is disturbed and re-suspended in the air, and the measurement result of the aerosol concentration is higher. In addition, even if the aerosol sampling port is provided at the top of the chamber, the spatial distribution characteristics of the falling aerosol cannot be obtained. In order to ensure the accuracy of experimental data and obtain the spatial distribution characteristics of aerosol, the existing sampling device needs to be improved.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a radioactive powder scattering aerosol measurement device with high accuracy, low interference and multiple data acquisition.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a measuring device for the scattered aerosol of radioactive powder.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
the utility model provides a unrestrained aerosol measuring device of radioactive powder, includes box room, and the top in box room has radioactive powder sprinkler head, and the top and the side in box room are equipped with a plurality of aerosol sampling components, and aerosol sampling component is including installing the aerosol sample connection on box room inner wall, sets up the aerosol sample thief that is connected with the aerosol sample connection in the box room outside, and aerosol sample connection department has mechanical valve or electric valve.
Further, the bottom of the box-type room is provided with an exhaust push plate, the bottom of the exhaust push plate is provided with an air cylinder, the outer edge of the exhaust push plate is provided with a sealing ring, and the sealing ring is in contact with the inner wall of the box-type room.
Further, a radioactive powder supply pipe connected with a radioactive powder spraying head is arranged on the outer side of the box-type room.
Further, the aerosol sampling ports on the top and the side of the box-type room are uniformly distributed at equal intervals.
Furthermore, the plurality of aerosol samplers are connected with a data display screen, and the data display screen displays parameters of the aerosol samplers.
The utility model has the advantages that: the radioactive powder scattering aerosol measuring device can determine the spatial distribution of various aerosols according to the experimental purpose, can be provided with disturbed resuspension aerosol concentration, and can also obtain the aerosol concentration caused by no resuspension, thereby realizing the determination of the spatial distribution of the radioactive powder scattering aerosol measuring device, deducting the error introduced by resuspension factors, and increasing the accuracy of measured data and the reliability of an estimation result.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the distribution of the aerosol sampling port on the top of the box-type room.
Detailed Description
Referring to fig. 1 and 2, the radioactive powder falling aerosol measuring device comprises a box-type room 1, wherein a radioactive powder spraying head 2 is arranged at the top of the box-type room 1, a radioactive powder supply pipe 3 connected with the radioactive powder spraying head 2 is arranged on the outer side of the box-type room 1, a plurality of aerosol sampling assemblies are arranged at the top and the side of the box-type room 1, each aerosol sampling assembly comprises an aerosol sampling port 4 installed on the inner wall of the box-type room, the aerosol sampling ports 4 on the top and the side of the box-type room 1 are uniformly distributed at equal intervals, an aerosol sampler 5 connected with the aerosol sampling port 4 is arranged on the outer side of the box-type room 1, and a mechanical valve or an electric valve 6 is arranged at the aerosol sampling port 4. The plurality of aerosol samplers 5 are connected with a data display screen, and the data display screen displays parameters of the aerosol samplers.
Further, the bottom of the box-type room 1 is provided with an exhaust push plate 7, the bottom of the exhaust push plate 7 is provided with a cylinder 8, the outer edge of the exhaust push plate 7 is provided with a sealing ring, and the sealing ring is in contact with the inner wall of the box-type room.
When the radioactive powder is scattered to measure the aerosol release source item, after the scattering experiment occurs, the radioactive powder spraying head 2 sprays the radioactive powder, the aerosol sampling port 4 samples the aerosol emitted by the radioactive powder, and then the aerosol sampler 5 measures the concentration of the sampled aerosol in real time;
the aerosol concentration at different distances and heights from the sprinkling point can be measured, and the spatial distribution characteristics of the aerosol can be obtained. The measurement data includes aerosol release when material is spilled and aerosol release caused by particulate resuspension driven by the sampler.
In addition, in order to avoid disturbance of the aerosol sampling port 4 to a scattered sample, an exhaust push plate 7 and an air cylinder 8 are arranged at the bottom of the box, after the scattering experiment occurs, the air cylinder 8 can push the exhaust push plate 7 to exhaust gas, so that scattered materials are isolated from air, and the aerosol measurement result caused by resuspension is deducted from the measurement result; the aerosol sampling results with different heights and different distances can be obtained according to the experimental purpose. And (5) recording experimental parameters, and finishing aerosol concentration measurement and release amount result estimation.
The radioactive powder scattering aerosol measuring device can obtain the aerosol spatial distribution concentration of each point position by arranging the sampling ports with different heights and different positions. The problem that the aerosol measurement result is higher due to resuspension disturbance can be effectively avoided and solved by arranging the pushing plate at the bottom of the box.
The radioactive powder scattering aerosol measuring device can determine the spatial distribution of various aerosols according to the experimental purpose, can be provided with disturbed resuspension aerosol concentration, and can also obtain the aerosol concentration caused by no resuspension, thereby realizing the determination of the spatial distribution of the radioactive powder scattering aerosol measuring device, deducting the error introduced by resuspension factors, and increasing the accuracy of measured data and the reliability of an estimation result.
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 above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a unrestrained aerosol measuring device of radioactive powder, includes box room, its characterized in that, the top in box room has radioactive powder sprinkler head, and the top and the side in box room are equipped with a plurality of aerosol sampling subassembly, and the aerosol sampling subassembly is including installing the aerosol sample connection on box room inner wall, sets up the aerosol sample thief that is connected with the aerosol sample connection in the box room outside, and aerosol sample connection department has mechanical valve or electric valve.
2. The radioactive powder falling aerosol measuring device of claim 1, wherein the bottom of the box-type chamber is provided with an exhaust push plate, the bottom of the exhaust push plate is provided with a cylinder, and the outer edge of the exhaust push plate is provided with a sealing ring which is in contact with the inner wall of the box-type chamber.
3. A radioactive powder falling aerosol measuring apparatus according to claim 1 or 2, wherein a radioactive powder supply pipe connected to a radioactive powder spraying head is provided outside the chamber.
4. A radioactive powder spilled aerosol measurement device according to claim 3, wherein the aerosol sampling ports on the top and sides of the chamber are equally spaced.
5. The radioactive powder spilled aerosol measurement device of claim 1, wherein a plurality of aerosol samplers are connected to a data display screen, the data display screen displaying parameters of each aerosol sampler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921904466.9U CN211697392U (en) | 2019-11-06 | 2019-11-06 | Measuring device for scattered aerosol of radioactive powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921904466.9U CN211697392U (en) | 2019-11-06 | 2019-11-06 | Measuring device for scattered aerosol of radioactive powder |
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| Publication Number | Publication Date |
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| CN211697392U true CN211697392U (en) | 2020-10-16 |
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| CN201921904466.9U Active CN211697392U (en) | 2019-11-06 | 2019-11-06 | Measuring device for scattered aerosol of radioactive powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649318A (en) * | 2020-11-23 | 2021-04-13 | 中国辐射防护研究院 | Nuclear facility material sprinkling accident aerosol measuring device and release source item estimation method |
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2019
- 2019-11-06 CN CN201921904466.9U patent/CN211697392U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649318A (en) * | 2020-11-23 | 2021-04-13 | 中国辐射防护研究院 | Nuclear facility material sprinkling accident aerosol measuring device and release source item estimation method |
| CN112649318B (en) * | 2020-11-23 | 2023-11-14 | 中国辐射防护研究院 | Nuclear facility material falling accident aerosol measurement device and release source item estimation method |
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