CN107015266A - A kind of calibration system and its scaling method of flow gas environment ion-chamber tritium concentration monitor - Google Patents
A kind of calibration system and its scaling method of flow gas environment ion-chamber tritium concentration monitor Download PDFInfo
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- CN107015266A CN107015266A CN201710366104.8A CN201710366104A CN107015266A CN 107015266 A CN107015266 A CN 107015266A CN 201710366104 A CN201710366104 A CN 201710366104A CN 107015266 A CN107015266 A CN 107015266A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/005—Details of radiation-measuring instruments calibration techniques
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Abstract
The invention belongs to Radiation monitoring technical field, it is related to a kind of calibration system and its scaling method of flow gas environment ion-chamber tritium concentration monitor.Described calibration system includes standard tritium gas offer unit, compressed air offer unit, surrounding air and provides unit, flow gas environment ion-chamber tritium concentration monitor, tritium gas recovery unit, and standard tritium gas offer unit and compressed air provide unit for indescribably supplying standard tritium gas and compressed air to the flow gas environment ion-chamber tritium concentration monitor progress demarcation time-division；Surrounding air, which provides unit, to be used to introduce the removing that surrounding air carries out residual tritium thereto before flow gas environment ion-chamber tritium concentration monitor is demarcated；Tritium gas recovery unit is used for the tritium in tail gas containing tritium gas is reclaimed after being demarcated to flow gas environment ion-chamber tritium concentration monitor.Using the calibration system and scaling method of the present invention, the demarcation of flow gas environment ion-chamber tritium concentration monitor can easy, be accurately carried out.
Description
Technical field
The invention belongs to Radiation monitoring technical field, it is related to a kind of mark of flow gas environment ion-chamber tritium concentration monitor
Determine system and its scaling method.
Background technology
Tritium is the radio isotope of hydrogen, and permeability is very strong, and the tritium discharged exchanges anti-by oxidation and isotope
Should, to be emitted in the form of HTO in surrounding air, constitute the primary pollution source of tritium.
Flow gas environment ion-chamber tritium monitor is the common equipment of gaseous state tritium monitoring in environment, and fast response time is fitted
Should be in various airborne online tritium monitoring fields.The ionisation chamber of flow gas environment ion-chamber tritium monitor is provided with import and goes out
Mouthful, under test gas is introduced using gas mode, the average electricity produced by incoming particle in cooling water of units of measurement time in ionisation chamber
The tritium activity concentration in the environment is measured from electric current.And the characteristic due to tritium in itself, the electric current of ionisation chamber formation is very
It is weak, generally 10-15A, therefore measured value is easily influenceed by measuring environment, memory effect etc., so monitor needs regular carry out
Demarcation.
To ensure the accuracy of flow gas environment ion-chamber tritium concentration monitor measurement, it is necessary to its calibration system and mark
The method of determining is optimized, but prior art is not reported in this regard.
The content of the invention
The primary and foremost purpose of the present invention is to provide a kind of calibration system of flow gas environment ion-chamber tritium concentration monitor, with
It can easy, accurately carry out the demarcation of flow gas environment ion-chamber tritium concentration monitor.
In order to achieve this, in the embodiment on basis, it is dense that the present invention provides a kind of flow gas environment ion-chamber tritium
The calibration system of monitor is spent, described calibration system includes standard tritium gas and provides unit, compressed air offer unit, environment sky
Air lift supplies unit, flow gas environment ion-chamber tritium concentration monitor, tritium gas recovery unit,
Described standard tritium gas provides unit and described compressed air provides unit and is used for described flow gas ring
The border ion-chamber tritium concentration monitor progress demarcation time-division, which be you can well imagine, supplies standard tritium gas and compressed air, described standard tritium gas and pressure
Contracting air is mixed before described flow gas environment ion-chamber tritium concentration monitor is entered with required flow-rate ratio；
Described surrounding air, which provides unit, to be used to enter to described flow gas environment ion-chamber tritium concentration monitor
The removing that surrounding air carries out residual tritium is introduced before rower is fixed thereto；
Described tritium gas recovery unit is used to enter rower to described flow gas environment ion-chamber tritium concentration monitor
The tritium in tail gas containing tritium gas is reclaimed after fixed.
In a preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitor
Calibration system, wherein described standard tritium gas, which provides unit, includes standard tritium gas bottle, standard tritium gas offer pipeline and standard tritium gas
Flow controller, the standard tritium gas that described standard tritium gas bottle is provided provides the standard set on pipeline through described standard tritium gas
Flow-rate adjustment and control are carried out after tritium gas flow controller.
In a kind of more preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitoring
The calibration system of instrument, wherein described standard tritium gas flow controller is divided into the high range (4MBq/m of parallel connection3-40MBq/m3) stream
Amount controller, middle range (400kBq/m3-4MBq/m3) flow controller and lower range (0-400kBq/m3) flow controller.
In a kind of more preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitoring
The calibration system of instrument, wherein described standard tritium gas, which provides unit, also includes standard tritium gas control valve, it is arranged on described
Standard tritium gas is provided on pipeline.
In a preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitor
Calibration system, wherein described compressed air, which provides unit, includes compressed air bottle, compressed air offer pipeline and compressed air
Flow controller, the compressed air that described compressed air bottle is provided provides the compression set on pipeline through described compressed air
Flow-rate adjustment and control are carried out after air flow controller.
In a kind of more preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitoring
The calibration system of instrument, wherein described compressed air, which provides unit, also includes compressed air control valve door, it is arranged on described
Compressed air is provided on pipeline.
In a preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitor
Calibration system, wherein described surrounding air, which provides unit, includes surrounding air offer pipeline and the gas circulation set thereon
Pump, described gas circulator applies power, surrounding air is provided pipeline through described surrounding air and enters described gas
Formula environment ion-chamber tritium concentration monitor.
In a kind of more preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitoring
The calibration system of instrument, also includes being arranged on described surrounding air offer pipeline wherein described surrounding air provides unit
Air control valve door and filter, dust, colloidal particles impurity that described filter is used in filtering environmental air.
In a preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitor
Calibration system, wherein described tritium gas recovery unit includes exhaust collection bottle and exhaust collection bottle, the flow gas ring described in connection
The tritium gas recovery pipe of border ion-chamber tritium concentration monitor.
In a kind of more preferred embodiment, the present invention provides a kind of flow gas environment ion-chamber tritium concentration monitoring
The calibration system of instrument, wherein the described internal filling lanthanum nickel alumin(i)um alloy of exhaust collection bottle, it has good in the case of compared with low temperature
Good tritium adsorptivity.
Second object of the present invention is to provide foregoing calibration system and carries out the monitoring of flow gas environment ion-chamber tritium concentration
The method of instrument demarcation, can easy, accurately carry out the demarcation of flow gas environment ion-chamber tritium concentration monitor.
In order to achieve this, in the embodiment on basis, the present invention provides foregoing calibration system and carries out flow gas environment
The method of ion-chamber tritium concentration monitor demarcation, comprises the following steps：
(1) disconnect described standard tritium gas and provide unit and described compressed air offer unit, connect described environment
Air provides unit, and surrounding air is introduced into described flow gas environment ion-chamber tritium concentration monitor and carries out residual tritium
Remove；
(2) disconnect described surrounding air and unit is provided, connect described standard tritium gas and unit and described compression are provided
Air provides unit, the flow gas environment electricity described in the flow-rate ratio progress of the described standard tritium gas of regulation and described compressed air
From the demarcation of room type tritium concentration monitor；
(3) tail gas containing tritium gas produced in the flow gas environment ion-chamber tritium concentration monitor demarcation described in is through described
Tritium gas recovery unit reclaims tritium therein.
The beneficial effects of the present invention are utilize the demarcation of the flow gas environment ion-chamber tritium concentration monitor of the present invention
System and its scaling method carry out field calibration, can easy, accurately carry out the monitoring of flow gas environment ion-chamber tritium concentration
The demarcation of instrument, determine measured value and calculate deviation.
The present invention can produce the constant tritium gas stream of activity concentration by flow controlling unit, be flow gas environment ion-chamber
Tritium monitor provides standard source, so as to develop flow gas environment ion-chamber tritium monitor calibration system first on this basis
And scaling method.The result shows that the calibration system and scaling method are feasible.
Brief description of the drawings
Fig. 1 is the composition of the calibration system of exemplary flow gas environment ion-chamber tritium concentration monitor of the invention
Figure.
Embodiment
The embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
The calibration system of exemplary flow gas environment ion-chamber tritium concentration monitor of the invention is as shown in figure 1, bag
Include standard tritium gas bottle 1, standard tritium gas control valve 2, standard tritium gas and pipeline 3, high range flow controller 4, middle range stream are provided
Amount controller 5, low-range controller 6, compressed air bottle 7, compressed air control valve door 8, compressed air provide pipeline 9,
Compressed air stream amount controller 10, gas circulator 11, surrounding air provide pipeline 12, filter 13, air control valve
Door 14, mixed gas pipeline 15, tritium gas recovery pipe 16, exhaust collection bottle 17, triple valve 18, control valve group 19, flow gas ring
Border ion-chamber tritium concentration monitor 20, surrounding air outflow pipeline 21.
Standard tritium gas bottle 1, standard tritium gas control valve 2, standard tritium gas provide pipeline 3, high range flow controller 4, in
Range flow controller 5, low-range controller 6 constitute standard tritium gas and provide unit.Standard tritium gas, which provides unit, to be used for
Standard tritium gas is provided when being demarcated to flow gas environment ion-chamber tritium concentration monitor 20.
The standard tritium gas that standard tritium gas bottle 1 is provided provides the standard tritium gas flow set on pipeline 3 through standard tritium gas and controlled
Flow-rate adjustment and control are carried out after device.Standard tritium gas flow controller is divided into the high range flow controller 4 of parallel connection, middle range stream
Amount controller 5 and low-range controller 6, they are respectively in high range (4MBq/m3-40MBq/m3), middle range (400kBq/
m3-4MBq/m3) and lower range (0-400kBq/m3) flow of standard tritium gas is adjusted and controlled.Standard tritium gas provides pipe
Control standard tritium gas is provided with road 3 the standard tritium gas control valve 2 that unit disconnects and accesses calibration system is provided.
Compressed air bottle 7, compressed air control valve door 8, compressed air provide pipeline 9, compressed air stream amount controller 10
Constitute compressed air and unit is provided.Compressed air, which provides unit, to be used for flow gas environment ion-chamber tritium concentration monitor 20
Compressed air is provided when being demarcated.
The compressed air of compressed air that compressed air bottle 7 is provided provides the compressed air require control set on pipeline 9
Flow-rate adjustment and control are carried out after device 10.Compressed air provide pipeline 9 on be provided with control compressed air provide unit disconnect and
Access the compressed air control valve door 8 of calibration system.
Standard tritium gas and compressed air in mixed gas pipeline 15 with after required flow-rate ratio mixing through control valve group 19,
The control of triple valve 18 enters flow gas environment ion-chamber tritium concentration monitor 20.
It is empty that gas circulator 11, surrounding air provide pipeline 12, filter 13, air control valve 14 composing environments of door
Air lift supplies unit.Surrounding air, which provides unit, to be used for before being demarcated to flow gas environment ion-chamber tritium concentration monitor 20
The removing that surrounding air carries out residual tritium is introduced thereto.
Surrounding air provides the gas circulator 11 set on pipeline 12 and applies power, surrounding air is carried through surrounding air
Enter flow gas environment ion-chamber tritium concentration monitor 20 for pipeline 12.Surrounding air provides and is provided with control ring on pipeline 12
Border air provides the air control valve door 14 that unit disconnects and accessed calibration system.Surrounding air is provided and set on pipeline 12
The granule foreign such as dust, colloid that is used in filtering environmental air of filter 13.
Surrounding air is entering flow gas environment ion-chamber tritium concentration monitor 20 after triple valve 18.It is residual in progress
After the removing for staying tritium, surrounding air flows out pipeline 21, control valve group 19 through surrounding air and enters exhaust collection bottle 17.
The tritium gas recovery pipe 16 of interconnection, exhaust collection bottle 17 constitute tritium gas recovery unit.Tritium gas recovery pipe 16
Other end connection flow gas environment ion-chamber tritium concentration monitor 20.Tritium gas recovery unit is used to ionize to flow gas environment
Room type tritium concentration monitor 20 reclaims the tritium in tail gas containing tritium gas after being demarcated.The inside filling lanthanum nickel aluminium of exhaust collection bottle 17 is closed
Gold, it has good tritium adsorptivity in the case of compared with low temperature.
Tail gas containing tritium gas is after outflow is to flow gas environment ion-chamber tritium concentration monitor 20, by triple valve 18, control
Valve group 19 processed enters exhaust collection bottle 17.
Triple valve 18 and to one section of pipeline between flow gas environment ion-chamber tritium concentration monitor 20 be surrounding air
There is provided pipeline 12 to share with tritium gas recovery pipe 16, switched over by the regulation of triple valve 18.
One section of pipeline between triple valve 18 and control valve group 19 is total to for mixed gas pipeline 15 with tritium gas recovery pipe 16
With being switched over by triple valve 18 and the regulation of control valve group 19.
One section of pipeline between control valve group 19 and exhaust collection bottle 17 flows out for tritium gas recovery pipe 16 with surrounding air
Pipeline 21 is shared, and is switched over by the regulation of control valve group 19.
The calibration system of the flow gas environment ion-chamber tritium concentration monitor of the invention of above-mentioned example carries out gas
The method that formula environment ion-chamber tritium concentration monitor 20 is demarcated is as follows.
(1) preparation is demarcated
Flow gas environment ion-chamber tritium concentration monitor 20 to be calibrated is accessed in calibration system first before being demarcated,
Air control valve door 14 is opened, starts gas circulator 11, clean environmental gas is introduced into calibration system, to whole system
System is purged, it is therefore an objective to eliminate the tritium for remaining in the inwall of flow gas environment ion-chamber tritium concentration monitor 20, is observed simultaneously
Instrument readings, when instrument readings are stable, record the measured value, for instrument background measured value C0.Close surrounding air control
Valve 14, switching three-way valve 18 to demarcation path.
(2) flow set and stably
Gas circulator 11 is closed, into calibrating procedure.Opening standard tritium gas control valve 2, compressed air control valve door
8, pass through high range flow controller 4, middle range flow controller 5 or low-range controller 6, compressed air require control
Device 10 is matched to the flow of standard tritium gas and compressed air.According to the flow of compressed air with entering calibration system standard tritium
The flow value of gas and current activity concentration matched after tritium calibrating gas concentration activity calculated value, that is, mix
The actual value C1 of tritium concentration activity in gas.The calibration system sets basic, normal, high three calibration points, passes through high range stream respectively
Amount controller 4, middle range flow controller 5, low-range controller 6 are matched somebody with somebody with the control flow of compressed air stream amount controller 10
Than realizing.
(3) demarcation and tritium are reclaimed
The mixed gas of standard tritium gas and compressed air passes through the heel row of flow gas environment ion-chamber tritium concentration monitor 20
Enter after tritium gas recovery unit, flow controlling unit numerical stability, switching control valve group 19, into flow gas environment ion-chamber tritium
The self circulation measuring flow of concentration monitor 20.Now, when apparatus measures stable reading, the reading is write down, for the mixed gas
Measured value C2.Pass through the measurement of measured value and the contrast conting flow gas environment ion-chamber tritium concentration monitor 20 of actual value
Deviation.The calibration system is provided with the flow controlling unit under 3 ranges, respectively for three calibration points of instrument range.Enter
Rower timing is purged to calibration system pipeline and ionisation chamber again in order to ensure accuracy after demarcation each time terminates.
Relative error ε is scheduled：
The calibration system should meet the environmental condition of ion-chamber tritium monitor (generally, for ionization when using
Room type tritium monitor, environment temperature is in the range of 0-50 DEG C, and 95%) ambient air relative humidity is not more than.It is tests determined, use
The above method is demarcated, relative error ε ＜ 10%, it is believed that monitor measurement is accurate.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations to the present invention belong to the model of the claims in the present invention and its equivalent technology
Within enclosing, then the present invention is also intended to comprising including these changes and modification.Above-described embodiment or embodiment are simply to the present invention
For example, the present invention can also be implemented with other ad hoc fashions or other particular form, without departing from the present invention's
Main idea or substantive characteristics.Therefore, it is regarded as from the point of view of the embodiment of description is in terms of any illustrative and non-limiting.This
The scope of invention should be illustrated that any change equivalent with the intention and scope of claim should also be included by appended claims
Within the scope of the invention.
Claims (10)
1. a kind of calibration system of flow gas environment ion-chamber tritium concentration monitor, it is characterised in that described calibration system
It is dense that unit, compressed air offer unit, surrounding air offer unit, flow gas environment ion-chamber tritium are provided including standard tritium gas
Monitor, tritium gas recovery unit are spent,
Described standard tritium gas provides unit and described compressed air provides unit and is used for described flow gas environment electricity
The demarcation time-division is carried out indescribably for standard tritium gas and compressed air from room type tritium concentration monitor, and described standard tritium gas and compression is empty
Gas is mixed before described flow gas environment ion-chamber tritium concentration monitor is entered with required flow-rate ratio；
Described surrounding air, which provides unit, to be used to enter rower to described flow gas environment ion-chamber tritium concentration monitor
The removing that surrounding air carries out residual tritium is introduced before fixed thereto；
Described tritium gas recovery unit is used for after being demarcated to described flow gas environment ion-chamber tritium concentration monitor
Reclaim the tritium in tail gas containing tritium gas.
2. calibration system according to claim 1, it is characterised in that：Described standard tritium gas, which provides unit, includes standard tritium
Gas cylinder, standard tritium gas provide pipeline and standard tritium gas flow controller, and the standard tritium gas that described standard tritium gas bottle is provided is through institute
The standard tritium gas stated, which is provided, carries out Flow-rate adjustment and control after the standard tritium gas flow controller set on pipeline.
3. calibration system according to claim 2, it is characterised in that：Described standard tritium gas flow controller is divided into parallel connection
Range be 4MBq/m3-40MBq/m3High range flow controller, range be 400kBq/m3-4MBq/m3Middle range flow
Controller and range are 0-400kBq/m3Low-range controller.
4. calibration system according to claim 2, it is characterised in that：Described standard tritium gas, which provides unit, also includes standard
Tritium gas control valve, it is arranged on described standard tritium gas and provided on pipeline.
5. calibration system according to claim 1, it is characterised in that：Described compressed air, which provides unit, includes compression sky
Gas cylinder, compressed air provide pipeline and compressed air stream amount controller, and the compressed air that described compressed air bottle is provided is through institute
The compressed air stated, which is provided, carries out Flow-rate adjustment and control after the compressed air stream amount controller set on pipeline.
6. calibration system according to claim 5, it is characterised in that：Described compressed air, which provides unit, also includes compression
Air shut-off valve door, it is arranged on described compressed air and provided on pipeline.
7. calibration system according to claim 1, it is characterised in that：Described surrounding air, which provides unit, includes environment sky
Air lift applies power for pipeline and the gas circulator set thereon, described gas circulator, makes surrounding air through described
Surrounding air provide pipeline enter described flow gas environment ion-chamber tritium concentration monitor.
8. calibration system according to claim 7, it is characterised in that：Described surrounding air, which provides unit, also to be included setting
Air control valve door and the filter on pipeline are provided in described surrounding air, described filter is used for filtering environmental
Dust, colloidal particles impurity in air.
9. calibration system according to claim 1, it is characterised in that：Described tritium gas recovery unit includes exhaust collection bottle
With the exhaust collection bottle described in connection, the tritium gas recovery pipe of flow gas environment ion-chamber tritium concentration monitor.
10. flow gas environment ion-chamber tritium concentration monitor mark is carried out according to any described calibration systems of claim 1-9
Fixed method, comprises the following steps：
(1) disconnect described standard tritium gas and provide unit and described compressed air offer unit, connect described surrounding air
Unit is provided, surrounding air is introduced into described flow gas environment ion-chamber tritium concentration monitor and carries out the clear of residual tritium
Remove；
(2) disconnect described surrounding air and unit is provided, connect described standard tritium gas and unit and described compressed air are provided
Unit, the flow gas environment ionisation chamber described in the flow-rate ratio progress of the described standard tritium gas of regulation and described compressed air are provided
The demarcation of type tritium concentration monitor；
(3) tail gas containing tritium gas produced in the flow gas environment ion-chamber tritium concentration monitor demarcation described in is through described tritium gas
Recovery unit reclaims tritium therein.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710366104.8A CN107015266A (en) | 2017-05-22 | 2017-05-22 | A kind of calibration system and its scaling method of flow gas environment ion-chamber tritium concentration monitor |
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| CN201710366104.8A CN107015266A (en) | 2017-05-22 | 2017-05-22 | A kind of calibration system and its scaling method of flow gas environment ion-chamber tritium concentration monitor |
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Cited By (6)
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| CN110308477A (en) * | 2019-05-30 | 2019-10-08 | 中核核电运行管理有限公司 | A method of it is demarcated using γ solid source to tritium ionisation chamber is surveyed |
| CN110780041A (en) * | 2019-11-12 | 2020-02-11 | 中国原子能科学研究院 | Online calibration system and method for hydrogen isotope mixed gas concentration detection alarm instrument |
| CN110954939A (en) * | 2019-12-24 | 2020-04-03 | 中国原子能科学研究院 | Tritium monitor laboratory calibrating device |
| CN111613360A (en) * | 2019-03-05 | 2020-09-01 | 中国原子能科学研究院 | Tritium removing process and device for tritium-containing radioactive solid wet waste |
| CN112557606A (en) * | 2021-02-28 | 2021-03-26 | 中国工程物理研究院核物理与化学研究所 | Auxiliary device special for measuring performance parameters of gas detector |
| CN114355433A (en) * | 2022-03-18 | 2022-04-15 | 中创智科(绵阳)科技有限公司 | Method for measuring response time of air tritium concentration rapid detector |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111613360A (en) * | 2019-03-05 | 2020-09-01 | 中国原子能科学研究院 | Tritium removing process and device for tritium-containing radioactive solid wet waste |
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| CN112557606A (en) * | 2021-02-28 | 2021-03-26 | 中国工程物理研究院核物理与化学研究所 | Auxiliary device special for measuring performance parameters of gas detector |
| CN114355433A (en) * | 2022-03-18 | 2022-04-15 | 中创智科(绵阳)科技有限公司 | Method for measuring response time of air tritium concentration rapid detector |
| CN114355433B (en) * | 2022-03-18 | 2022-08-23 | 中创智科(绵阳)科技有限公司 | Method for measuring response time of air tritium concentration rapid detector |
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Application publication date: 20170804 |
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