CN108168955A - The accumulation sampling system and method for tritiated vapor in a kind of air - Google Patents
The accumulation sampling system and method for tritiated vapor in a kind of air Download PDFInfo
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- CN108168955A CN108168955A CN201810234983.3A CN201810234983A CN108168955A CN 108168955 A CN108168955 A CN 108168955A CN 201810234983 A CN201810234983 A CN 201810234983A CN 108168955 A CN108168955 A CN 108168955A
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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
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
Accumulation sampling system and method, system the invention discloses tritiated vapor in a kind of air include：Aspiration pump (2), for collecting the collection device of tritiated vapor in air (1), for giving the regulated power supply (4) and flowmeter (3) of aspiration pump (2) power supply, the sample tap (11) of collection device (1) is connected with outside, gas outlet (12) is connect with the bleeding point (21) of aspiration pump (2), the exhaust outlet (22) of aspiration pump (2) is connect with the air-flow test side (31) of flowmeter (3), the result feedback end (32) of flowmeter (3) is connect with regulated power supply (4), regulated power supply (4) can be exported according to the Signal Regulation that flowmeter (3) is fed back to the power of aspiration pump (2), so that the air-flow for flowing through collection device (1) keeps stablizing.The configuration of the present invention is simple, it is of low cost, it is easy to carry, it is easy to operate, long-time sampling can be carried out in arbitrary region, sampling system is stable.
Description
Technical field
Accumulation sampling system and side the present invention relates to tritiated vapor in nuclear power field more particularly to a kind of air
Method.
Background technology
Tritium in nature has both sides source, when it is naturally-produced, second is that artificially generated.Naturally-produced tritium
Mainly occur in an atmosphere.Artificially generated tritium is then that the mankind occur in atomic energy cause is developed as a kind of by-product
, such as various nuclear weapon, all kinds of reactors, treatment plant and some dedicated for produce tritium device.In light water reactor, tritium
Mainly generated in fuel, control rod, burnable poison and cooling agent.
Tritium is one of most important radioactivity nucleic of nuclear power plant's discharge.Tritium is the isotope of hydrogen, easily with hydrone
Into environment and human body is reached, radiation effect is caused to human body.Although the biological effects of radiation of tritium are smaller, due to its discharge capacity
Greatly, and with the further investigation of low dose rate randomness radiation effect, the monitoring of tritium in various surrounding mediums is increasingly subject to close
Note.
Currently on the market there is not yet portable gas sampler or mobile gas available for radioactivity monitoring sample
Device.Tritiated vapor in air is generally collected using the method for air setting, this method collection water sample is too fast, can not obtain ring
The long-term effect of tritiated water concentration in the air of border.In order to realize automation obtain surrounding air in tritiated vapor it is long-term
Effect, it is necessary to the accumulated samples system of tritiated vapor in portable air is developed, in order to tritiated water in surrounding air
The long-term effect of steam is analyzed.
In the nuclear industry such as nuclear power plant design at present, tritiated vapor sampling in air is designed with and more complicated is taken online
Sample pipeline, and it is sampled monitoring with sampler.And the on-line period pipeline designed, by taking PWR nuclear power plant as an example, Zhi Nengqu
The tritiated vapor of a few system.On-line period pipeline system there is a problem in that：
Since the air inlet of on-line period pipeline is fixed, the gas source of extraction is fixed single room in workshop
It is interior, it when whether being uniformly mixed in indefinite workshop, can not determine samples' representativeness, failure is mixed particularly in workshop
When, it will be without representativeness；Workshop difference floor or the gas of different zones can not be obtained, area distribution analysis can not be completed, it can not
Carry out delegate analysis；Interior, interior, aggregation zone of gas tank of the hall space other than these systems etc. can not be carried out to be sampled；
The design of on-line period pipeline system is complicated, and construction cost, operating cost, maintenance cost are very high；On-line period pipeline system
Pipeline is long, and representativeness is under suspicion；On-line period pipeline system is high to the dependence of power supply；On-line period pipeline system is associated with
KRT systems may lead to KRT thrashings, so as to influence the normal safety in production power generation of power plant.
Invention content
The technical problem to be solved in the present invention is, for the nothing of the above-mentioned existing on-line period pipeline system of the prior art
The defects of representative, complicated, of high cost, provides the accumulation sampling system and method for tritiated vapor in a kind of air.
The technical solution adopted by the present invention to solve the technical problems is：Construct a kind of accumulation of tritiated vapor in air
Sampling system, including：Aspiration pump, for collect the collection device of tritiated vapor in air, for give the aspiration pump power supply
Regulated power supply and flowmeter, the sample tap of the collection device connects with outside, the gas outlet of the collection device and institute
The bleeding point connection of aspiration pump is stated, the exhaust outlet of the aspiration pump is connect with the air-flow test side of the flowmeter, the flow
The result feedback end of meter is connect with the regulated power supply, and the regulated power supply is connect with the aspiration pump, and the regulated power supply can
It is exported according to the Signal Regulation that the flowmeter is fed back to the power of the aspiration pump, so as to flow through the air-flow of the collection device
It keeps stablizing.
In air of the present invention in the accumulation sampling system of tritiated vapor, the collection device includes being filled with
It is covered for the collecting pipe for adsorbing the sorbing material of tritiated vapor and with two that the collecting pipe both ends are detachably connected,
One of them described capping sets the sample tap, another described capping sets the gas outlet.
In air of the present invention in the accumulation sampling system of tritiated vapor, the sorbing material is discoloration silica gel
Or molecular sieve.
It is considerable with one on the collecting pipe in air of the present invention in the accumulation sampling system of tritiated vapor
Observe the transparent region of the sorbing material.
In air of the present invention in the accumulation sampling system of tritiated vapor, inside the collecting pipe by its two
End position sets locating part respectively, and the sorbing material is filled between two locating parts.
In air of the present invention in the accumulation sampling system of tritiated vapor, the locating part for cotton or every
Plate offers venthole of multiple apertures less than the size of the sorbing material on the partition board.
In air of the present invention in the accumulation sampling system of tritiated vapor, spiral shell between the collecting pipe and capping
Line connects.
In air of the present invention in the accumulation sampling system of tritiated vapor, the sample tap of the collection device connects
It is connected to a hose.
In air of the present invention in the accumulation sampling system of tritiated vapor, the sample tap and the hose it
Between pass through a self-locking seal connector connection fix.
In air of the present invention in the accumulation sampling system of tritiated vapor, the flow is calculated as mass flow
Meter.
The present invention is also claimed a kind of accumulation based on the accumulation sampling system of tritiated vapor in the air and takes
Quadrat method, it is characterised in that method includes：
In sampling process, the aspiration pump twitches air into collection device, the suction in the collection device
Tritiated vapor in enclosure material absorption air；
The tail gas that the collection device is discharged is expelled to the flowmeter by the aspiration pump；
The flowmeter is to the relevant signal of regulated power supply Real-time Feedback air mass flow；
The regulated power supply is exported according to the Signal Regulation that the flowmeter is fed back to the power of the aspiration pump, so that stream
The air-flow for crossing the collection device keeps stablizing.
Preferably, the sorbing material is discoloration silica gel, and the method further includes：Before the sampling process starts,
Discoloration silica gel is subjected to drying postcooling, discoloration silica gel is fitted into collection device after cooling；
The method further includes：The regulated power supply is opened to start the sampling process, silica gel to be changed colour is completely by indigo plant
After discoloration is red, regulated power supply is closed to terminate the sampling process, takes out discoloration silica gel, and discoloration silica gel is transferred to round bottom
It in flask, then is placed in electric jacket and heats distillation, the water sample collected adds in scintillation solution, darkens after a certain period of time, is put into super
It is measured on Low background liquid scintillation counter.
Implement the accumulation sampling system and method for tritiated vapor in the air of the present invention, have the advantages that：
The accumulation sampling system of tritiated vapor in the air of the present invention, simple in structure, cost is easy to carry, easy to operate；It can be
Arbitrary region is sampled；It is realized by flow control and sampled for a long time, the long-term effect of tritiated water concentration in air can be obtained
Should, it is on duty always without operating personnel, it alleviates the labor intensity of tritium monitoring sampling personnel and improves work efficiency, meet
Relate to the long-time accumulation sampling of the tritiated vapor of low concentration in the air of tritium place；Flowmeter monitors and to regulated power supply Real-time Feedback
The detection signal that air mass flow generates, regulated power supply realizes Power auto-adjustment according to the feedback of flowmeter, so as to ensure to sample
The stable operation of system overcomes and the shortcomings that water sample is too fast is collected in traditional technology；Autogamy power supply does not depend on field power supply system
System, can use during non-transformer at the scene, and reduces staff and find power supply and pull the irradiation that cable is subject to.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings：
Fig. 1 is the structural representation of the accumulation sampling system of tritiated vapor in the air that present pre-ferred embodiments provide
Figure；
Fig. 2 is the disassembly diagram of the collection device in Fig. 1.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In attached drawing
Give the exemplary embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is made to the disclosure more thorough and comprehensive.
It should be noted that when an element is considered as " connection " another element, it can be directly to separately
One element may be simultaneously present centering elements.Unless otherwise defined, all technologies used herein and section are academic
Language has the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.Herein in the description of the invention
Used term is intended merely to the purpose of description specific embodiment, it is not intended that in the limitation present invention.
The total thinking of the present invention is：A kind of accumulation sampling system of tritiated vapor in air is constructed, including：Aspiration pump,
For collecting the collection device of tritiated vapor in air, regulated power supply and flowmeter for powering to the aspiration pump,
The sample tap of the collection device is connected with outside, and the gas outlet of the collection device is connect with the bleeding point of the aspiration pump,
The exhaust outlet of the aspiration pump is connect with the air-flow input of the flowmeter, the detection output of the flowmeter with it is described can
Power supply connection is adjusted, the regulated power supply is connect with the aspiration pump, the letter that the regulated power supply can be fed back according to the flowmeter
Number adjust output to the aspiration pump power so that flow through the collection device air-flow keep stablize.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the application
The detailed description of technical solution rather than the restriction to technical scheme, in the absence of conflict, the present invention are implemented
Technical characteristic in example and embodiment can be combined with each other.
With reference to figure 1-2, the accumulation sampling system of tritiated vapor in air of the invention, including：Aspiration pump 2, for receiving
Collect collection device 1, the regulated power supply 4 and flowmeter 3 for powering to the aspiration pump 2 of tritiated vapor in air.
Wherein, the sample tap 11 of the collection device 1 with outside connect, the gas outlet 12 of the collection device 1 with it is described
The bleeding point 21 of aspiration pump 2 connects, and the exhaust outlet 22 of the aspiration pump 2 is connect with the air-flow test side 31 of the flowmeter 3, institute
The result feedback end 32 for stating flowmeter 3 is connect with the regulated power supply 4, and the regulated power supply 4 is connect with the aspiration pump 2.
Preferably, the flowmeter 3 is mass flowmenter, can corresponding electric signal be exported according to air-flow size.
In the present embodiment, the regulated power supply 4 can be exported according to the Signal Regulation that the flowmeter 3 is fed back to the pumping
The power of pump 2, so that the air-flow for flowing through the collection device 1 keeps stablizing.For example, if the signal that flowmeter 3 is fed back shows
Air-flow becomes smaller, then can increase power of the output to the aspiration pump 2, whereas if the signal that flowmeter 3 is fed back shows gas
Rheology is big, then can reduce power of the height output to the aspiration pump 2, in short, the signal that flowmeter 3 is fed back is to regulated power supply
4 power output realizes feedback regulation, and the air-flow for flowing through the collection device 1 is finally made to keep stablizing.
It should be noted that above-mentioned so-called air-flow keeps stablizing, air-flow not necessarily to be caused to keep a steady state value,
It can be in the range of the reasonable error of an air flow value or can be in a preset fluctuation range.
Specifically, with reference to figure 2, the collection device 1 includes being filled with the sorbing material 104 for adsorbing tritiated vapor
Collecting pipe 101 and two cappings 102 being detachably connected with 101 both ends of collecting pipe.For the ease of dismantling, preferably
, it is threadedly coupled between the collecting pipe 101 and capping 102.
Wherein, the setting of the capping 102 connection collecting pipe 101 on top and the sample tap 11 of exterior space, bottom end
The capping 102 setting connection collecting pipe 101 and exterior space the gas outlet 12.
It is further preferred that a hose can also be connected in the sample tap 11 of the collection device 1.So as to extract
Gas tank, confined space that the personnel of being not easy to enter etc. are sampled, protection staff's health.Further, in order to can
To ensure will not revealing for the air got, it is ensured that the accuracy of monitoring passes through one between the sample tap 11 and the hose
The connection of self-locking seal connector is fixed.
Specifically, the sorbing material 104 is discoloration silica gel or molecular sieve.Preferably change colour silica gel.Can so it lead to
The color change for crossing observation discoloration silica gel judges whether adsorption saturation.
Further, for the ease of observing the color change of discoloration silica gel, one can be observed on the collecting pipe 101
The transparent region of the sorbing material 104, preferably, entire collecting pipe 101 can be glass tube.
Can be tubular it is understood that the shape of collecting pipe 101 is not limited, can also it is snakelike or other
Irregular shape.
In order to avoid sorbing material 104 spills, it is preferred that can be inside the collecting pipe 101 by its end positions
Locating part 103 is set respectively, and the sorbing material 104 is filled between two locating parts 103.For example, the locating part
103 can be cotton or partition board, if selection partition board, multiple apertures can be offered on the partition board less than the suction
The venthole of the size of enclosure material 104.
It is dried in use, discoloration silica gel is placed in baking oven at 110 DEG C first, drying, which is placed in drier, to be cooled down,
It is fitted into after cooling in collecting pipe 101, the both ends of collecting pipe 101 are packed into partition board or cotton；Regulated power supply 4 is opened, aspiration pump 2 will be empty
Gas is acquired into collecting pipe 101, and the tritiated vapor in air is monitored simultaneously by discoloration silica gel absorption, tail gas by mass flowmenter
To the 4 relevant electric signal of Real-time Feedback air mass flow of regulated power supply, regulated power supply 4 realizes power according to the feedback of mass flowmenter
Automatic adjustment, so as to ensure the stable operation of sampling system.After discoloration silica gel becomes red from blue completely, adjustable electric is closed
Discoloration silica gel is taken out in source 4, and discoloration silica gel is transferred in round-bottomed flask, is placed in electric jacket and heats distillation, the water collected
Sample adds in scintillation solution, after darkening 5 hours, is put on ultralow background fluid scintillation counter and measures.
The sampling system of the present embodiment, can solve hall space other than on-line period system, in gas tank, aggregation zone
Etc. site sampling devices, and the progress such as piecemeal, layering area distribution inside the hall space equipped with on-line period system can be solved
With the site sampling device of representativeness verification, advantage and income are as follows：
1) on-line period system is not depended on, can be sampled in arbitrary region, can be sent out in workshop radioassay
Wave important role；
2) sample tap can external hose, gas tank, confined space that the personnel of being not easy to enter etc. can be extracted and be sampled,
Protect staff's health；
3) sampling line is very short, has extraordinary representativeness, can be sent out when verifying on-line period pipeline representativeness
Wave important role；
4) autogamy power supply does not depend on field power supply system, can be used during non-transformer at the scene, and reduces staff and seek
It looks for power supply and pulls the irradiation that cable is subject to；
5) it is light-weight, it is easy to carry；It is easy to operate, that is, it pulls out and breaks, be easy to use；
6) it is equipped with self-locking seal connector, it is ensured that the air got will not be revealed, it is ensured that the accuracy of monitoring；
7) it manufactures at low cost.
8) sampling system can be realized by flow control and be sampled for a long time, can obtain the length of tritiated water concentration in air
Wall effect, it is on duty always without operating personnel, it alleviates the labor intensity of tritium monitoring sampling personnel and improves work efficiency, it is full
Foot relates to the long-time accumulation sampling of the tritiated vapor of low concentration in the air of tritium place；
9) sampling system is higher to the collecting efficiency of tritiated vapor, effectively collects tritiated water in air；
10) sampling system is monitored by mass flowmenter and to regulated power supply Real-time Feedback air mass flow, regulated power supply root
Power auto-adjustment is realized according to the feedback of mass flowmenter, so as to ensure the stable operation of sampling system；
11) sampling system realizes the controllable adjustment of flow by mass flowmenter, is collected so as to overcome in traditional technology
The shortcomings that water sample is too fast.
Based on same inventive concept, the invention also discloses a kind of accumulations based on tritiated vapor in the air to take
The accumulation sampling method of sample system, method include：
In sampling process, the aspiration pump 2 twitches air into collection device 1, described in the collection device 1
Sorbing material 104 adsorbs the tritiated vapor in air；
The tail gas that the collection device 1 is discharged is expelled to the flowmeter 3 by the aspiration pump 2；
The flowmeter 3 is to the 4 relevant signal of Real-time Feedback air mass flow of regulated power supply；
The regulated power supply 4 is exported according to the Signal Regulation that the flowmeter 3 is fed back to the power of the aspiration pump 2, with
The air-flow for flowing through the collection device 1 is made to keep stablizing.
Preferably, the sorbing material 104 is discoloration silica gel, and the method further includes：Start it in the sampling process
Before, discoloration silica gel is subjected to drying postcooling, discoloration silica gel is fitted into collection device 1 after cooling；
Specifically, the method further includes：The regulated power supply 4 is opened to start the sampling process, silica gel to be changed colour
After becoming red from blue completely, regulated power supply 4 is closed to terminate the sampling process, discoloration silica gel is taken out, by the silica gel that changes colour
It is transferred in round-bottomed flask, then is placed in electric jacket and heats distillation, the water sample collected adds in scintillation solution, darkens a timing
Between after, be put on ultralow background fluid scintillation counter and measure.
The embodiment of the present invention is described above in conjunction with attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned specific embodiment is only schematical rather than restricted, those of ordinary skill in the art
Under the enlightenment of the present invention, present inventive concept and scope of the claimed protection are not being departed from, can also made very much
Form, these are belonged within the protection of the present invention.
Claims (10)
1. a kind of accumulation sampling system of tritiated vapor in air, which is characterized in that including：Aspiration pump (2), for collecting sky
The collection device (1) of tritiated vapor, regulated power supply (4) and flowmeter for powering to the aspiration pump (2) in gas
(3), the sample tap (11) of the collection device (1) is connected with outside, gas outlet (12) and the pumping of the collection device (1)
Bleeding point (21) connection of air pump (2), the exhaust outlet (22) of the aspiration pump (2) and the air-flow test side of the flowmeter (3)
(31) connect, the result feedback end (32) of the flowmeter (3) connect with the regulated power supply (4), the regulated power supply (4) and
Aspiration pump (2) connection, the regulated power supply (4) can be exported according to the Signal Regulation that the flowmeter (3) is fed back to described
The power of aspiration pump (2), so that the air-flow for flowing through the collection device (1) keeps stablizing.
2. the accumulation sampling system of tritiated vapor in air according to claim 1, which is characterized in that described to collect dress
(1) is put including being filled with for adsorb the collecting pipe of the sorbing material of tritiated vapor (104) (101) and with the collecting pipe
(101) two cappings (102) that both ends are detachably connected, one of them described capping (102) set the sample tap (11), separately
One capping (102) sets the gas outlet (12).
3. the accumulation sampling system of tritiated vapor in air according to claim 2, which is characterized in that the adsorption material
Expect (104) for discoloration silica gel or molecular sieve.
4. the accumulation sampling system of tritiated vapor in air according to claim 2, which is characterized in that the collecting pipe
(101) there is a transparent region that the sorbing material (104) can be observed on.
5. the accumulation sampling system of tritiated vapor in air according to claim 2, which is characterized in that the collecting pipe
(101) internal to set locating part (103) respectively by its end positions, the sorbing material (104) is filled in two limits
Between position part (103)；
The locating part (103) is cotton or partition board, and multiple apertures are offered on the partition board less than the sorbing material
(104) venthole of size.
6. the accumulation sampling system of tritiated vapor in air according to claim 1, which is characterized in that described to collect dress
The sample tap (11) for putting (1) is connected with a hose.
7. the accumulation sampling system of tritiated vapor in air according to claim 1, which is characterized in that the sample tap
(11) fixation is connect by a self-locking seal connector between the hose.
8. the accumulation sampling system of tritiated vapor in air according to claim 1, which is characterized in that the flowmeter
(3) it is mass flowmenter.
9. a kind of accumulation sampling of the accumulation sampling system of tritiated vapor in 1-8 any one of them air based on claim
Method, which is characterized in that the collection device (1) adsorbs tritiated vapor using sorbing material (104), and method includes：
In sampling process, the aspiration pump (2) twitches air into collection device (1), the institute in the collection device (1)
State the tritiated vapor in sorbing material (104) absorption air；
The tail gas that the collection device (1) is discharged is expelled to the flowmeter (3) by the aspiration pump (2)；
The flowmeter (3) is to the relevant signal of the regulated power supply (4) Real-time Feedback air mass flow；
The regulated power supply (4) is exported according to the Signal Regulation that the flowmeter (3) is fed back to the power of the aspiration pump (2),
So that the air-flow for flowing through the collection device (1) keeps stablizing.
10. the accumulation sampling method of tritiated vapor in air according to claim 9, which is characterized in that the absorption
Material (104) is discoloration silica gel；
The method further includes：Before the sampling process starts, discoloration silica gel is subjected to drying postcooling, will be become after cooling
Color silica gel is fitted into collection device (1)；
The method further includes：The regulated power supply (4) is opened to start the sampling process, silica gel to be changed colour is completely by blue
After becoming red, regulated power supply (4) is closed to terminate the sampling process, takes out discoloration silica gel, and discoloration silica gel is transferred to circle
It in the flask of bottom, then is placed in electric jacket and heats distillation, the water sample collected adds in scintillation solution, darkens after a certain period of time, is put into
It is measured on ultralow background fluid scintillation counter.
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| CN201810234983.3A CN108168955A (en) | 2018-03-21 | 2018-03-21 | The accumulation sampling system and method for tritiated vapor in a kind of air |
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| CN201810234983.3A CN108168955A (en) | 2018-03-21 | 2018-03-21 | The accumulation sampling system and method for tritiated vapor in a kind of air |
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| CN208012909U (en) * | 2018-03-21 | 2018-10-26 | 阳江核电有限公司 | The accumulation sampling system of tritiated water vapour in a kind of air |
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- 2018-03-21 CN CN201810234983.3A patent/CN108168955A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203025025U (en) * | 2013-01-08 | 2013-06-26 | 中国工程物理研究院核物理与化学研究所 | Tritium-containing waste gas emission monitoring and automatic sampling system |
| CN204064747U (en) * | 2014-07-28 | 2014-12-31 | 武汉碧海云天科技股份有限公司 | A kind of Intelligent constant flow low discharge gas collecting pick-up unit |
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