CN208969246U - A kind of novel aerosol meets panel detector structure - Google Patents
A kind of novel aerosol meets panel detector structure Download PDFInfo
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- CN208969246U CN208969246U CN201821679306.4U CN201821679306U CN208969246U CN 208969246 U CN208969246 U CN 208969246U CN 201821679306 U CN201821679306 U CN 201821679306U CN 208969246 U CN208969246 U CN 208969246U
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Abstract
The utility model provides a kind of novel aerosol and meets panel detector structure, including shield, probe assembly and filter assemblies inside shield are set, and the lower section of probe assembly is arranged in the filter assemblies, and the circuit board at probe assembly and ARM processing board is arranged in；The probe assembly includes PIPS semiconductor detector and plastic scintillator detector, the filter assemblies include filter housings, inlet plenum, exhaust chamber, curl-paper box, cam, paper-pressing mechanism and chart drive motor are provided in the filter head housings body, the utility model detects α and β radiation in aerosol using PIPS semiconductor detector (passivation injection surface silicon detector), and detects background gamma-rays present in environment by the biggish plastic scintillator detector of volume.
Description
Technical field
The utility model relates to a kind of nuclear power plant's waste gas monitoring technical fields, and in particular to a kind of novel aerosol meets spy
Survey device structure.
Background technique
The exhaust gas that PWR Nuclear Power Plant generates finally is discharged into environment.In order to check that the discharge stream of nuclear power station is
Whether no relevant regulations that meet national standards, the concentration of discharge stream are lower than operation limit value, for public's agent around estimation nuclear power station
Amount provides basic data, it is ensured that nuclear power plant's staff's personal safety, it is necessary to aerosol in nuclear power plant's chimney Airborne Effluent
Radioactive substance activity concentration is continuously measured.
PWR Nuclear Power Plant is by there are two types of the gases of smoke stack emission: first is that reactor building and auxiliary kitchen is logical
General mood body.Leakage of the radioactive source of this kind of gas from equipment or the air near pressure vessel are activated.Second is that Waste
Gas.Technology waste gas from primary Ioops generally has the radioactive substance of higher concentration；It may also in steam from secondary circuit
Contain radgas.
In existing monitoring device, general aerosol radioactive substance unable to monitor.
Utility model content
In view of this, there is provided a kind of novel aerosols to meet panel detector structure for the main purpose of the utility model.
The technical solution adopted in the utility model are as follows:
A kind of novel aerosol meets panel detector structure, including
Shield, is arranged in probe assembly and filter assemblies inside shield, and the filter assemblies setting is detecting
The lower section of component, and the circuit board at probe assembly and ARM processing board are set；
The probe assembly includes PIPS semiconductor detector and plastic scintillator detector, the PIPS semiconductor probe
Device is arranged on the downside of plastic scintillator detector, and outside is by stainless steel case integral packaging, the hollow setting of stainless steel case, in
It is embedded with gas flow, gas flow is connected to the air inlet pipe for penetrating shield；
The filter assemblies include filter housings, be provided in the filter head housings body inlet plenum, exhaust chamber, curl-paper box,
Cam, paper-pressing mechanism and chart drive motor, the chart drive motor drive the filter paper in filter paper box from side curl-paper box to the other side
Filter paper box, filter paper pass through between inlet plenum and exhaust chamber, compress when transmitting filter paper through paper-pressing mechanism.
Further, the inlet plenum is connected to gas flow, and positive lower end is provided with exhaust chamber, is set on the exhaust chamber
It is equipped with exhaust pipe, the PIPS semiconductor detector is arranged in inlet plenum.
Further, the PIPS semiconductor detector is selectedPIPS semiconductor detector；
The modeling is dodged detector and is selectedPlastic scintillator detector.
Further, the paper-pressing mechanism includes the paper-weight for compressing filter paper, and the paper-weight is by spring members and admittedly
Determine device connection.
The utility model using in PIPS semiconductor detector (passivation injection surface silicon detector) detection aerosol α and
β radiation, and background gamma-rays present in environment is detected by the biggish plastic scintillator detector of volume.Aerosol detection
Detector, filter device, sampling channel are packaged together by device, ensure that the safety of device.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the three-dimensional structure diagram of the utility model；
Fig. 3 is the structural schematic diagram of filter assemblies in the utility model；
Fig. 4 is the circuit diagram that novel aerosol meets panel detector structure in the utility model；
Fig. 5 is the schematic diagram of aerosol detection device in the utility model；
Fig. 6 is α, β spectrum of typical radon in the utility model, thorium daughter.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing and specific embodiment, in the signal of this utility model
Property embodiment and explanation be used to explain the utility model, but be not intended to limit the scope of the present invention.
The detection of aerosol monitoring device is β ray of the energy range for 80keV~3.0MeV, 3.7 × 10- of measurement range
1Bq/m3~3.7 × 103Bq/m3(normal range).
Aerosol detection device is sampled the radioaerosol in nuclear power plant's chimney discharge stream using High Efficiency Filter Media.
In this case, the radiation that aerosol detection device is faced be it is sufficiently complex, referring to Figure 5,
The radiation that aerosol detection device is faced has:
The natural sum of detector ambient enviroment is radiated from the γ of aerosol
β radiation from aerosol (including artificial Cs, Pu and Rn, Th daughter)
α radiation from aerosol (including artificial Cs, Pu and Rn, Th daughter)
In the radiation that aerosol detection device is faced, α, β comprising a large amount of radon, thorium radioactive daughter 222Rn and 220Rn
Interference radiation, as shown in table 5.1 and table 5.2.
5.1 radon daughter of table222Rn radiation and energy
5.2 thorium daughter of table220Rn radiation and energy
Referring to Fig. 6, difference can be distinguished by the special peak β with γ spectrum Radionuclide activity, β radiation is continuous spectrum.And
Aliasing by directly measuring aerosol is composed, and β penetrating property nucleic can not be distinguished from mixed spectrum.Therefore, it is
The β ray that energy range is 80keV~3.0MeV in detection aerosol, needs to take the side for compensating radon, thorium daughter
Method, it may be assumed that by the α activity in measurement power spectrum, deducted according to braning factor and counted with the β of α radiation association, to realize molten to gas
Energy range is the Beta-ray detection of 80keV~3.0MeV in glue.
This programme uses α the and β spoke in PIPS semiconductor detector (passivation injection surface silicon detector) detection aerosol
It penetrates, and background gamma-rays present in environment is detected by the biggish plastic scintillator detector of volume.
Detector, filter device, sampling channel are packaged together by aerosol detection device, and concrete scheme is as follows, reference
Fig. 1 to Fig. 3, the utility model provide a kind of novel aerosol and meet panel detector structure, including shield 1, and setting is shielding
The lower section of probe assembly 2 is arranged in probe assembly 2 and filter assemblies 3 inside body 1, the filter assemblies 3, and setting exists
Circuit board and ARM processing board at probe assembly 2；
The probe assembly 2 includes PIPS semiconductor detector 201 and plastic scintillator detector 202, the PIPS half
For the setting of conductor detector 201 in 202 downside of plastic scintillator detector, outside is described stainless by 203 integral packaging of stainless steel case
The hollow setting of steel shell 203, has been embedded in gas flow, and gas flow is connected to the air inlet pipe 204 for penetrating shield 1；
The filter assemblies 3 include filter housings, be provided in the filter head housings body inlet plenum 304, exhaust chamber 305,
Filter paper box 302, cam 303, paper-pressing mechanism and chart drive motor 308, the chart drive motor 308 drive the filter in filter paper box 302
Paper 307 is from side filter paper box to other side filter paper box, and filter paper 307 is by transmitting filter paper between inlet plenum 304 and exhaust chamber 305
It is compressed when 307 through paper-pressing mechanism, the paper-pressing mechanism includes the paper-weight 309 for compressing filter paper 307, and the paper-weight 309 passes through
Spring members 310 are connect with fixator 311.
When filter paper 307 is finished, the chart drive motor 308 tenses filter paper, and band moving cam 303 rotates, and cam 303 presses
Microswitch 301 cuts off 308 power supply of chart drive motor, and radiation processing unit sending filter paper 307 is finished alarm on the spot to aerosol
Signal, after receiving the alarm signal, radiation processing unit stops detection to aerosol on the spot, and filter paper 307 to be replaced is waited to receive the report
After alert signal, radiation processing unit stops detection to aerosol on the spot, waits filter paper 307 to be replaced.
Filter paper 307 is finished alarm signal and can manually close, release.
The inlet plenum 304 is connected to gas flow, and positive lower end is provided with exhaust chamber 305, is set on the exhaust chamber 305
It is equipped with exhaust pipe 306, the PIPS semiconductor detector 201 is arranged in inlet plenum 304.
The 201 face filter paper 307 of PIPS semiconductor detector, for measuring the radon deposited on filter paper 307, thorium daughter
α and β amount of radiation is deducted according to braning factor and is counted with the β of α radiation association by the measurement to α activity；
The modeling dodges detector 202 and is used to measure the gamma-rays emitted in environmental exact details, deducts the influence of environmental exact details, with
And the upper end that detector 202 is dodged in the modeling is provided with photomultiplier tube 205.
The PIPS semiconductor detector 201 is selectedPIPS semiconductor detector；
The modeling is dodged detector 202 and is selectedPlastic scintillator detector；
The PIPS semiconductor detector 201 has thinner entrance window thickness, as shown in table 5.3.
The entrance window thickness (equivalent silicon) of 5.3 3 kinds of detectors of table
In type selecting, the thin entrance window of the PIPS semiconductor detector 201 presents especially good in low-level α spectrometry
Performance, substantially increase alpha detection efficiency.And for very faint β ray, the decaying of PIPS detector is smaller.Due to
With very high α and β resolution ratio, PIPS detector is a ideal detector for continuously monitoring airborne discharge stream.
Referring to Fig. 4, it is more that preamplifier, shaping unit, coincident circuit and 1024 numbers are provided on the circuit board
Channel unit, the output signal that detector 202 is dodged in the modeling are first sent into shaping unit and carry out shaping, are then fed into coincident circuit；
When detector is dodged in semiconductor detector gate-control signal and modeling reaches coincident circuit simultaneously, coincident circuit generates γ and counts pulse,
It is sent into ARM processing board and carries out γ counting.
ARM processing board to digital multi-channel acquisition to β power spectrum analyzed, handled, deduct α, β interference of environmental exact details.
The RS485 interface for communication is provided in the ARM processing board.
Digital multiple tracks, coincident circuit, the design of ARM processing board form a front-end processing on two pieces of different circuit boards
Unit is installed along on equipment supporter with other equipment of monitor.Front-end processing unit passes through RS485 interface and spoke on the spot
It penetrates processing unit to be communicated, measured data is transferred to radiation processing unit (LRP) on the spot and is processed and displayed.
This programme takes anticoincidence detection method to compensate the α of Rn, Th daughter radiation and β radiation.PIPSb semiconductor probe
α and the β radiation of the radon, thorium daughter that deposit on device detection filter paper deduct α radiation according to braning factor by the measurement to α activity
It is counted with the β with α radiation association.
On circuit, when detector is dodged in PIPS detector gate-control signal and modeling reaches coincident circuit simultaneously, coincident circuit is produced
Raw γ counts pulse, is sent into ARM processing board and carries out γ counting.
ARM processing board to digital multi-channel acquisition to β power spectrum analyzed, handled, deduct α, β interference of environmental exact details.
Technical solution disclosed in the utility model embodiment is described in detail above, it is used herein specifically
Embodiment is expounded the principle and embodiment of the utility model embodiment, and the explanation of above embodiments is only applicable to
Help understands the principle of the utility model embodiment；At the same time, for those skilled in the art, it is real according to the utility model
Example is applied, there will be changes in terms of specific embodiments and scope of application, in conclusion the content of the present specification should not be understood
For limitations of the present invention.
Claims (4)
1. a kind of novel aerosol meets panel detector structure, which is characterized in that including
Shield, is arranged in probe assembly and filter assemblies inside shield, and the filter assemblies are arranged in probe assembly
Lower section, and the circuit board at probe assembly and ARM processing board are set；
The probe assembly includes PIPS semiconductor detector and plastic scintillator detector, and the PIPS semiconductor detector is set
It sets on the downside of plastic scintillator detector, outside is embedded in by stainless steel case integral packaging, the hollow setting of stainless steel case
There is gas flow, gas flow is connected to the air inlet pipe for penetrating shield；
The filter assemblies include filter housings, be provided in the filter head housings body inlet plenum, exhaust chamber, curl-paper box, cam,
Paper-pressing mechanism and chart drive motor, the chart drive motor drive the filter paper in filter paper box from side curl-paper box to other side filter paper
Box, filter paper pass through between inlet plenum and exhaust chamber, compress when transmitting filter paper through paper-pressing mechanism.
2. novel aerosol according to claim 1 meets panel detector structure, which is characterized in that the inlet plenum and gas
Runner connection, positive lower end are provided with exhaust chamber, exhaust pipe are provided on the exhaust chamber, and the PIPS semiconductor detector is set
It sets in inlet plenum.
3. novel aerosol according to claim 1 meets panel detector structure, which is characterized in that the PIPS semiconductor is visited
Device is surveyed to selectPIPS semiconductor detector；
The plastic scintillator detector is selectedPlastic scintillator detector.
4. novel aerosol according to claim 1 meets panel detector structure, which is characterized in that the paper-pressing mechanism includes
The paper-weight of filter paper is compressed, the paper-weight is connect by spring members with fixator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821679306.4U CN208969246U (en) | 2018-10-16 | 2018-10-16 | A kind of novel aerosol meets panel detector structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821679306.4U CN208969246U (en) | 2018-10-16 | 2018-10-16 | A kind of novel aerosol meets panel detector structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254316A (en) * | 2018-10-16 | 2019-01-22 | 陕西卫峰核电子有限公司 | A kind of nuclear power station aerosol continuous radiation monitoring device |
| CN112730179A (en) * | 2020-12-23 | 2021-04-30 | 天津智易时代科技发展有限公司 | Portable beta-ray in-situ online monitor and monitoring method |
| CN113238273A (en) * | 2021-04-27 | 2021-08-10 | 赛睿环仪(北京)科技有限公司 | Radon daughter measuring system and method |
| CN113588357A (en) * | 2021-08-04 | 2021-11-02 | 中国科学院上海应用物理研究所 | Automatic paper feeding, sampling and measuring device for radioactive aerosol |
-
2018
- 2018-10-16 CN CN201821679306.4U patent/CN208969246U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254316A (en) * | 2018-10-16 | 2019-01-22 | 陕西卫峰核电子有限公司 | A kind of nuclear power station aerosol continuous radiation monitoring device |
| CN109254316B (en) * | 2018-10-16 | 2023-12-29 | 陕西卫峰核电子有限公司 | Nuclear power station aerosol continuous radiation monitoring device |
| CN112730179A (en) * | 2020-12-23 | 2021-04-30 | 天津智易时代科技发展有限公司 | Portable beta-ray in-situ online monitor and monitoring method |
| CN113238273A (en) * | 2021-04-27 | 2021-08-10 | 赛睿环仪(北京)科技有限公司 | Radon daughter measuring system and method |
| CN113588357A (en) * | 2021-08-04 | 2021-11-02 | 中国科学院上海应用物理研究所 | Automatic paper feeding, sampling and measuring device for radioactive aerosol |
| CN113588357B (en) * | 2021-08-04 | 2024-05-03 | 上海中科新核智能科技有限公司 | Automatic paper feeding sampling and measuring device for radioactive aerosol |
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