CN109655876A - Tritium activity on-line water flushing system - Google Patents
Tritium activity on-line water flushing system Download PDFInfo
- Publication number
- CN109655876A CN109655876A CN201811399283.6A CN201811399283A CN109655876A CN 109655876 A CN109655876 A CN 109655876A CN 201811399283 A CN201811399283 A CN 201811399283A CN 109655876 A CN109655876 A CN 109655876A
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- China
- Prior art keywords
- water flushing
- line water
- flushing system
- tritium
- scintillating fiber
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/203—Measuring radiation intensity with scintillation detectors the detector being made of plastics
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The present invention provides a kind of tritium activity on-line water flushing system, and the system comprises sample inlets and sample export, is connected with sampling unit and measuring unit in turn along a pipeline between the sample inlet and sample export；The measuring unit includes black box, the measurement component in case and the signal transmitting assembly being connected outside case and with the measurement component, the measurement component includes plastic scintillating fiber, the plastic scintillating fiber include be coated with can reflectorized material the first plastic scintillating fiber and the second exposed plastic scintillating fiber.Tritium activity on-line water flushing system of the invention measures radioactivity using plastic scintillating fiber, fast response time when measurement of tritium sample, measurement is simple, it is short in time of measuring, and use two class plastic scintillating fibers, the characteristics of capable of excluding other Radiometric interferences, realizes the tritium activity real-time measurement of tritium sample under complex environment.
Description
Technical field
The detection system that the present invention designs, specially a kind of tritium activity on-line water flushing system.
Background technique
Tritium is a kind of Beta-ray radionuclide of sending, and the ray energy is low, and range is short, easily shields.If in tritium sample
In be mixed with other radionuclides, the measurement result of tritium activity is highly prone to their influence.
Nuclear power station can generate a large amount of tritium-containing liquid wastes, and exhaust gas containing tritium when running, the tritium concentration in these waste water and exhaust gas
It measures extremely difficult.Because usually containing other radionuclides in these samples, these radionuclides can issue various energy
γ the and β ray of amount, these rays can interfere Tritium measurement, influence the accuracy of tritium activity measurement.
Current mostly uses liquid after sampling to dodge measurement method in liquid tritium sample.This method can not real-time measurement, and need
Purification processes are carried out to complex component sample, time of measuring is long and can generate a large amount of radioactive wastes.And gaseous state tritium sample makes
With ionisation chamber measurement method, ionisation chamber can not identify the source of various rays.Therefore it is inaccurate to will cause measurement result.
Summary of the invention
The object of the present invention is to provide the tritium activity on-line water flushing systems under a kind of complex environment based on plastic scintillating fiber
System, to realize the real-time and accurate measurement of tritium activity in tritium sample in complex environment.
To achieve the goals above, the present invention provides a kind of tritium activity on-line water flushing system, the system comprises samples
Entrance and sample export are connected with sampling unit in turn along a pipeline between the sample inlet and sample export and measurement are single
Member；The measuring unit includes black box, the measurement component in case and the letter being connected outside case and with the measurement component
Number transmitting assembly, the measurement component includes plastic scintillating fiber, the plastic scintillating fiber include be coated with can reflectorized material
One plastic scintillating fiber and the second exposed plastic scintillating fiber.
The plastic scintillating fiber is disposed in parallel relation to one another, and is equidistantly arranged in a manner of array rounded on its section
Column.
It is described can reflectorized material be zinc sulphide, aluminium film or tin thin film.
The measurement component further includes bracket, and the bracket is made of one piece of plastic plate and stabilizer blade, and stabilizer blade is solid by bolt
It is scheduled in the black box, many small sircle holes is provided on plastic plate, the plastic scintillating fiber is directly through small sircle hole.
The measurement component further includes light-conductive optic fibre, the optical fibers gather for respectively with the first plastic scintillating fiber and
Two connected beams of second plastic scintillating fiber；And the signal transmitting assembly includes two and is connected respectively with a branch of light-conductive optic fibre
Photoelectric conversion medium and the signal coupler being connected with the two photoelectric conversion media.
The measurement component further includes the first photo-coupler, two beam optical fibers pass through respectively first photo-coupler with
First plastic scintillating fiber or the second plastic scintillating fiber are connected.
The photoelectric conversion medium is the second photo-coupler and photomultiplier tube being connected with each other, and photoelectric conversion medium passes through
Second photo-coupler is connected with light-conductive optic fibre；Or the photoelectric conversion medium is avalanche diode.
The signal transmitting assembly further includes a preamplifier, and the preamplifier is connected with signal coupler.
The sampling unit includes valve and the sampling pump that is connected by the pipeline with valve, after the sampling pump
End is connected with the entrance of measuring unit.
The measuring unit is electrically connected with a signal processing unit, and the signal processing unit includes programmable control module
And power supply.
The programmable control module is single-chip microcontroller, PLC or PC.
Tritium activity on-line water flushing system of the invention measures radioactivity using plastic scintillating fiber, measurement of tritium sample
When fast response time, measurement is simple, dodges sampling and measuring technology and electrolytic measurement technology better than liquid on the response time, and after measuring
Sample can reuse, do not generate any radioactive waste；And sampling unit and measuring unit are successively arranged in pipeline
On, and can realize the measurement of gaseous state or the liquid sample containing tritium；Further, since present invention employs two class plastic scintillating fibers, one
Class has coating, another kind of not have coating, and the β ray that tritium is issued can not penetrate coating, and the ray for interfering nucleic to issue can
Coating is penetrated, and coating influences very little to the alpha ray shield and therefore can exclude other Radiometric interferences, tritium is issued
The ray that is issued with other radioactive substances of β ray distinguish, realize that the tritium under the complex environments of a variety of interference nucleic is accurate
Measurement.In addition, tritium activity on-line water flushing system of the invention is realized in real time using photoelectric converting device and signal coupler
Signal subtraction can obtain measurement result in real time；And its signal processing unit is set as being electrically connected with measuring unit, therefore signal
Processing unit can reduce interference of the ray to the aging effect and weak signal of electronic equipment, improve and set far from radiation field
Standby service life and measurement accuracy.
Detailed description of the invention
Fig. 1 is the schematic diagram according to the tritium activity on-line water flushing system of one embodiment of the present of invention.
Fig. 2A is a kind of schematic diagram of measuring unit of tritium activity on-line water flushing system as shown in Figure 1.
Fig. 2 B is the schematic diagram of another measuring unit of tritium activity on-line water flushing system as shown in Figure 1.
Specific embodiment
Below with reference to specific implementation case, the present invention is described in detail.Following embodiment will be helpful to the skill of this field
Art personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the common skill of this field
For art personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to this hair
Bright protection scope.
As shown in Figure 1 for according to the tritium activity on-line water flushing system of one embodiment of the present of invention, the system comprises samples
Product entrance 40 and sample export 50 are connected with sampling list in turn along a pipeline I between the sample inlet 40 and sample export 50
Member 10 and measuring unit 20, the measuring unit 20 are electrically connected with a signal processing unit 30.
Wherein, sampling unit 10 includes valve 11 and the sampling pump 12 being connected by pipeline I with valve 11, sampling pump 12
Rear end be connected with the entrance of measuring unit 20.
As shown in Figure 2 A, measuring unit 20 include black box 21, the measurement component 22 in case and be located at case outside and with institute
The connected signal transmitting assembly 23 of measurement component 22 is stated, black box 21 is single by its injection port 211 and outlet 212 and sampling respectively
Member 10 is connected to sample export 50, so that sample enters black box 21 by sampling unit 10, and to be full of sample in black box 21,
Black box is left from sample export 50, and the measurement component 22 being located in case is immersed in measurement component 22 all in sample.
Wherein, black box 21 is made of black plastic, and black thus is presented in outside, inside to be pasted with aluminium foil etc. anti-
Luminescent material.
The measurement component 22 includes plastic scintillating fiber 221, light-conductive optic fibre 222 and the first photo-coupler 223 and uses
In the bracket 224 of fixed plastics scintillating fiber 221.
Wherein, plastic scintillating fiber 221 is disposed in parallel relation to one another, and equidistant in a manner of array rounded on its section
Arrangement.Wherein, plastic scintillating fiber 221 include it is some be coated with can reflectorized material zinc sulphide (be also coated with aluminium film or tin thin film
Etc. can reflectorized material) the first plastic scintillating fiber 221a and some the second exposed plastic scintillating fiber 221b.As a result,
The β ray that tritium is issued can not penetrate can reflectorized material coating, and can penetrate can reflective material for the ray for interfering nucleic to issue
The coating of material, and can reflectorized material on the alpha ray shield influence very little.Therefore, in the case of can be realized a variety of interference nucleic
Tritium accurately measures.
Correspondingly, the optical fibers 222 are gathered for two beams, wherein a branch of pass through first photo-coupler 223 and
One plastic scintillating fiber 221a is connected, and another beam passes through first photo-coupler 223 and the second plastic scintillating fiber 221b phase
Even.Wherein the length of optical fibers 222 can be adjusted as needed.First photo-coupler 223 be plastic scintillating fiber 221 with
The photo-coupler of light-conductive optic fibre 222.
Bracket 224 is made of one piece of plastic plate and stabilizer blade, and stabilizer blade is bolted in black box 21, is provided on plastic plate
Many small sircle holes, plastic scintillating fiber 221 is directly through small sircle hole, to be fixed by bracket 224.
Signal transmitting assembly 23 includes two photoelectric conversion media, 231, signal couplers 232 and a preposition amplification
Device 233, each photoelectric conversion medium 231 are connected with a branch of light-conductive optic fibre 221 respectively, and two photoelectric conversion media 231 are equal
It is connected with signal coupler 232, to realize signal subtraction by the signal coupler 232.Preamplifier 233 and signal coupling
Clutch 232 is connected, to amplify the signal after subtracting each other.The second plastic scintillating fiber 221b irradiates photoelectricity conversion medium 231 and sends out as a result,
Signal out subtracts the signal that the first plastic scintillating fiber 221a irradiation photoelectricity conversion medium 231 issues, finally obtained signal
Access preamplifier 223.
As shown in Figure 2 A, the second photo-coupler 2311 and photoelectricity being connected with each other can be selected in the photoelectric conversion medium 231
Multiplier tube 2312, photoelectric conversion medium 231 are connected by the second photo-coupler 2311 with light-conductive optic fibre 221.
In addition, as shown in Figure 2 B, the photoelectric conversion medium 231 or avalanche diode, to play photoelectric conversion
And preamplification.
In addition to this, the photoelectric conversion medium 231 of signal transmitting assembly 23, signal coupler 232 and a preposition amplification
Any one or more in device 233 need to be placed in black box 21 or far from black box 21.
Again referring to Figure 1, signal processing unit 30 includes: programmable control module (such as single-chip microcontroller, PLC or PC) and electricity
Source, wherein programmable control module is connected with the preamplifier 233 (as shown in Figure 2 A) of measuring unit 20, and power supply is programmable
Control module, preamplifier 233 and photoelectric conversion medium 231 are powered.
Sample export 50 can connect waste liquid cylinder or again the source of the Sample introduction sample after measurement, such as if
Sample comes from a pipeline, can be connected to sample export on the pipeline, the sample surveyed is discharged into pipeline again.
Illustrate the tritium activity realized using above-mentioned tritium activity on-line water flushing system below with reference to Fig. 1, Fig. 2A and Fig. 2 B
On-line water flushing method, specifically includes:
S1: opening valve 11, opens sampling pump 12:；
S2: waiting for a period of time after (waiting time is related with the space size of sampling rate and black box 21), open signal
Processing unit 30.
S3: the electric current I that the second plastic scintillating fiber 221b is generated is read by signal processing unit 301It is dodged with the first plastics
The electric current I that bright fiber 221a is generated2Difference DELTA I, record time of measuring t, and calculate the activity A of sample to be tested.The public affairs of activity A
Formula can voluntarily derive acquisition according to measuring principle.
Activity A are as follows: A=η1·η2·ΔI·n/t
Wherein, η1For the conversion coefficient of electric current and population, η2For measurement efficiency, η1And η2Product be real by calibration
Test acquisition；Δ I is the electric current that the electric current that the second plastic scintillating fiber 221b is generated and the first plastic scintillating fiber 221a are generated
Difference, unit A, t are time of measuring, unit s.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (10)
1. a kind of tritium activity on-line water flushing system, which is characterized in that the system comprises sample inlet (40) and sample exports
(50), sampling unit (10) is connected in turn along a pipeline (I) between the sample inlet (40) and sample export (50) and survey
It measures unit (20)；
The measuring unit (20) include black box (21), the measurement component (22) in case and be located at case it is outer and with the measurement
The connected signal transmitting assembly (23) of component (22), the measurement component (22) include plastic scintillating fiber (221), which dodges
Bright fiber (221) include be coated with can reflectorized material the first plastic scintillating fiber (221a) and the second exposed plastic scintillating fiber
(221b)。
2. tritium activity on-line water flushing system according to claim 1, which is characterized in that the plastic scintillating fiber (221)
It is disposed in parallel relation to one another, and is equidistantly arranged in a manner of array rounded on its section.
3. tritium activity on-line water flushing system according to claim 1, which is characterized in that it is described can reflectorized material be vulcanization
Zinc, aluminium film or tin thin film.
4. tritium activity on-line water flushing system according to claim 1, which is characterized in that the measurement component (22) further includes
Bracket (224), the bracket (224) are made of one piece of plastic plate and stabilizer blade, and stabilizer blade is bolted on the black box (21)
It is interior, many small sircle holes are provided on plastic plate, the plastic scintillating fiber (221) is directly through small sircle hole.
5. tritium activity on-line water flushing system according to claim 1, which is characterized in that the measurement component (22) further includes
Light-conductive optic fibre (222), the optical fibers (222) are gathered to dodge with the first plastic scintillating fiber (221a) and the second plastics respectively
Two bright fiber (221b) connected beams；And the signal transmitting assembly (23) include two respectively with a branch of light-conductive optic fibre (221)
Connected photoelectric conversion medium (231) and the signal coupler (232) being connected with the two photoelectric conversion media (231).
6. tritium activity on-line water flushing system according to claim 5, which is characterized in that the measurement component (22) further includes
First photo-coupler (223), two beam optical fibers (222) are dodged by first photo-coupler (223) and the first plastics respectively
Bright fiber (221a) or the second plastic scintillating fiber (221b) are connected.
7. tritium activity on-line water flushing system according to claim 5, which is characterized in that the photoelectric conversion medium (231)
For the second photo-coupler (2311) and photomultiplier tube (2312) being connected with each other, photoelectric conversion medium (231) passes through the second light
Coupler (2311) is connected with light-conductive optic fibre (221)；Or the photoelectric conversion medium (231) is avalanche diode.
8. tritium activity on-line water flushing system according to claim 5, which is characterized in that the signal transmitting assembly (23) is also
Including a preamplifier (233), the preamplifier (233) is connected with signal coupler (232).
9. tritium activity on-line water flushing system according to claim 1, which is characterized in that the sampling unit (10) includes valve
Door (11) and the sampling pump (12) being connected by the pipeline (I) with valve (11), the rear end of the sampling pump (12) and survey
The entrance for measuring unit (20) is connected.
10. tritium activity on-line water flushing system according to claim 1, which is characterized in that the measuring unit (20) and one
Signal processing unit (30) electrical connection, the signal processing unit (30) includes programmable control module and power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399283.6A CN109655876B (en) | 2018-11-22 | 2018-11-22 | Tritium activity on-line detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399283.6A CN109655876B (en) | 2018-11-22 | 2018-11-22 | Tritium activity on-line detection system |
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| CN109655876A true CN109655876A (en) | 2019-04-19 |
| CN109655876B CN109655876B (en) | 2021-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156486A (en) * | 2021-04-20 | 2021-07-23 | 成都理工大学 | Tritium water concentration real-time detection system for nuclear power station liquid effluent |
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156486A (en) * | 2021-04-20 | 2021-07-23 | 成都理工大学 | Tritium water concentration real-time detection system for nuclear power station liquid effluent |
| 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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| Publication number | Publication date |
|---|---|
| CN109655876B (en) | 2021-01-29 |
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