CN106680864B - A kind of tritium gas flow-generator system and method for constant density - Google Patents
A kind of tritium gas flow-generator system and method for constant density Download PDFInfo
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- CN106680864B CN106680864B CN201610934329.4A CN201610934329A CN106680864B CN 106680864 B CN106680864 B CN 106680864B CN 201610934329 A CN201610934329 A CN 201610934329A CN 106680864 B CN106680864 B CN 106680864B
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- 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 discloses a kind of tritium gas flow-generator system and methods of constant density, tritium gas flow-generator system includes closed loop, tritium gas flow-generator is disposed on closed loop, to school tritium air monitor and tritium gas stream circulating pump, the temperature conditioning unit with the cooperation of tritium gas flow-generator is additionally provided on closed loop, the arrival end of temperature conditioning unit and outlet end are provided with temperature sensor, the arrival end of tritium gas stream circulating pump and outlet end are provided with pressure sensor, temperature conditioning unit and to be provided with hygrometer between the tritium air monitor of school, it further include the nitrogen storage storage being connected to tritium gas flow-generator, nitrogen storage storage is used to provide drying nitrogen for closed loop.The present invention solves the problems, such as airborne tritium monitor magnitude tracing, and is able to achieve the accurate alignment of airborne tritium monitor.Nuclear facilities large size nuclear power unit, military isotope production reactor, military isotopic content test site, the airborne tritium monitoring of military isotope packing field of employment can be achieved.
Description
Technical field
The present invention relates to Radioactivity Measurements to calibrate field, and in particular to a kind of tritium gas flow-generator system of constant density and
Method.
Background technique
Bubbling method principle is generallyd use to the calibration of tritium air monitor at present and designs a set of tritium gas flow-generator standard set-up,
The dried air for making flow velocity certain is passed through by constant temperature containing being bubbled in surabaya, generates saturation tritium gas stream, then allows the tritium gas stream
By tritium air monitor device, last terminally positioned condensate recycling device carries out quantitative analysis to the tritiated water being recovered to, counter to push away
The activity concentration of tritium gas stream in sparging process, to realize the calibration to tritium air monitor device.However due to position same in sparging process
The presence of plain fractionation factor (ratio of liquid tritium activity concentration in the gaseous state tritium and bubbler that bubbler bloats in sparging process)
And less than 1, cause bulging tritium gas stream activity concentration be not it is constant, with the lasting progress of sparging process, the tritium gas of bulging
Stream activity concentration can be gradually increased, and surabaya quality can gradually decrease in bubbler, can not bloat saturation tritium gas stream after a certain period of time,
It need to stop being bubbled and rejoining surabaya, be unable to satisfy long period of experiments requirement.The material of dry air generallys use molecular sieve
It is dry as drier with silica gel, it not can guarantee air adiabatic drying, influence the accurate alignment to tritium air monitor.
Summary of the invention
The purpose of the present invention is to provide the tritium gas flow-generators for the constant surabaya activity concentration for solving above-mentioned technical problem
System.
Moreover, it relates to a kind of tritium gas stream generating method of constant surabaya activity concentration.
The present invention is achieved through the following technical solutions:
A kind of tritium gas flow-generator system of constant density, including closed loop, on the closed loop according to
It is secondary to be provided with tritium gas flow-generator, to school tritium air monitor and tritium gas stream circulating pump, it is additionally provided on the closed loop
With the temperature conditioning unit of tritium gas flow-generator cooperation, the arrival end of temperature conditioning unit and outlet end are provided with temperature sensor, described
The arrival end of tritium gas stream circulating pump and outlet end are provided with pressure sensor, the temperature conditioning unit and to school tritium air monitor it
Between be provided with hygrometer, further include the nitrogen storage storage being connected to tritium gas flow-generator, the nitrogen storage storage is used for as closure
Circulation loop provides drying nitrogen.
Further, recovery unit is additionally provided on closed loop；The recovery unit is for recycling closed circulation
Tritium gas stream in circuit.
Further, the arrival end of recovery unit is equipped with the second valve；The recovery unit further includes the discharge of a connection
Pipeline.
Further, tritium gas stream flow rate control unit, the tritium gas stream flow control list are provided on closed loop
Member is arranged between nitrogen storage storage and tritium gas flow-generator.
Further, tritium gas stream buffer cell is additionally provided on closed loop；The tritium gas stream buffer cell is used for
Stablize tritium air-flow velocity, the arrival end of the tritium gas stream buffer cell is connected with the outlet end of the tritium gas stream circulating pump, institute
The outlet end for stating tritium gas stream buffer cell is connected with the arrival end of the tritium gas stream flow rate control unit.
Further, the arrival end of tritium gas flow-generator and outlet end are respectively equipped with inlet valve and outlet valve.
Further, the outlet end of nitrogen storage storage is equipped with the first valve.
A kind of tritium gas stream generating method of the tritium gas flow-generator system of constant density, comprising the following steps:
1), circuit airtight test: closed loop is no more than ± 5kPa in interior pressure change for 24 hours, and air-tightness is normal；
2), circuit empties: after airtight test is normal, dry zone is passed through into closed loop by nitrogen storage storage
The nitrogen of high pressure guarantees dry environment in closed loop to drain the air in closed loop；
3), tritium gas stream occurs: after humidity is met the requirements in closed loop, quickly accessing known to surabaya activity concentration
Tritium gas flow-generator is then turned off the inlet valve and outlet valve of tritium gas flow-generator, opens temperature conditioning unit, adjusts tritium gas stream
The temperature of tritiated water in generator, after coolant-temperature gage tritiated in tritium gas flow-generator is consistent with the preset temperature of temperature conditioning unit,
The inlet valve and outlet valve for opening tritium gas flow-generator then turn on tritium gas stream circulating pump, adjust tritium gas stream flow control
For unit to ensure tritium gas flow-generator bulging saturation tritium gas stream, it is big that tritium gas stream flow rate control unit can adjust in real time tritium air-flow velocity
It is small and can recorde accumulation throughput and instantaneous velocity, it reads under different tritium air-flow velocities and is read to stablizing for school tritium air monitor
Number, carries out accurate alignment to it, makes calibration curve.
Compared with prior art, the present invention having the following advantages and benefits:
The present invention solves the problems, such as airborne tritium monitor magnitude tracing, and is able to achieve the accurate school of airborne tritium monitor
It is quasi-.Nuclear facilities large size nuclear power unit can be achieved, military isotope production reactor, military isotopic content test site are military same
The airborne tritium monitoring of position element packing field of employment etc. provides important analysis foundation for nuclear facilities safe operation and accident conditions,
Accurately reflect the operating condition of nuclear facilities.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of tritium gas flow-generator system shown in the present invention.
Label and corresponding parts title in attached drawing:
Closed loop 10, nitrogen storage storage 20, tritium gas flow-generator 30, temperature conditioning unit 40, to school tritium air monitor
50, tritium gas stream circulating pump 60, tritium gas stream flow rate control unit 11, temperature sensor 12, pressure sensor 13, hygrometer 14, the
One valve 21, inlet valve 31, outlet valve 32, tritium gas stream buffer cell 70, recovery unit 80, the second valve 81, delivery pipe
Road 82.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
As shown in Figure 1, a kind of tritium gas flow-generator system of constant density of the present invention, including closed loop
10, nitrogen storage storage 20, tritium gas flow-generator 30, temperature conditioning unit 40, to school tritium air monitor 50 and tritium gas stream circulating pump 60.
Tritium gas flow-generator 30 is disposed on the closed loop 10, to school tritium air monitor 50 and tritium gas stream circulating pump
60, the temperature conditioning unit 40 cooperated with tritium gas flow-generator 30 is additionally provided on the closed loop 10, temperature conditioning unit 40
Arrival end and outlet end are provided with temperature sensor 12, and the arrival end of the tritium gas stream circulating pump 60 and outlet end are provided with
Pressure sensor 13, the temperature conditioning unit 40 and to be provided with hygrometer 14 between school tritium air monitor 50 further include and tritium gas
The nitrogen storage storage 20 that flow-generator 30 is connected to, the nitrogen storage storage 20 are used to provide dry nitrogen for closed loop 10
Gas.
The closed loop 10 is equipped with tritium gas stream flow rate control unit 11, for adjusting the tritium gas in circuit in real time
Stream flow velocity size simultaneously records accumulation throughput and instantaneous velocity, reads under different tritium air-flow velocities so that this system can be realized
Stablize reading to school tritium air monitor 50, accurate alignment is carried out to it, makes calibration curve.On the closed loop 10
It is additionally provided with two temperature sensors, 12, two pressure sensors 13 and hygrometer 14.
Temperature change feelings of two temperature sensors 12 for tritium gas stream in closed loop 10 described in real-time detection
Entrance and outlet end in temperature conditioning unit 40 is set separately in condition, two temperature sensors 12, is bubbled front and back air-flow for monitoring
Temperature judges the temperature control capacity of temperature conditioning unit 40.
Two pressure sensors 13 are for the pressure changing in closed loop 10 described in real-time detection, and two
Pressure sensor 13 is separately positioned on entrance and the outlet end of tritium gas stream circulating pump 60, for monitoring 60 front and back of tritium gas stream circulating pump
Pressure difference, judge whether the work of tritium gas stream circulating pump 60 normal and system whether gas leakage.
The hygrometer 14 is used to detect the humidity in the closed loop 10, when the hygrometer 14 detects institute
When stating the relative humidity in closed loop 10 less than 0.1%, the delivery of nitrogen into the closed loop 10 can be stopped
Gas.The setting of hygrometer 14 is in temperature conditioning unit 40 and to be for monitoring the tritium gas stream bloated between school tritium air monitor 50
No saturation.
The nitrogen storage storage 20 is connected with the closed loop 10, for mentioning to the closed loop 10
Guarantee environmental drying in circuit for nitrogen to exclude the air in circuit.The outlet end of the nitrogen storage storage 20 is equipped with first
Valve 21, for controlling to 10 conveyings of closed loop/stopping supplying nitrogen, the nitrogen storage storage 20 is arranged in tritium
30 upstream of flow generator.
The tritium gas flow-generator 30 is set in the closed loop 10, for generating saturation tritium gas stream.The tritium
The arrival end of flow generator 30 and outlet end are respectively equipped with inlet valve 31 and outlet valve 32, are respectively used to control tritium gas stream
Flow in and out.
The temperature conditioning unit 40 is used to control the temperature of the tritiated water in the tritium gas flow-generator 30, is testing it
Cheng Zhong remains a suitable preset temperature.
It is described to be set in the closed loop 10 to school tritium air monitor 50, and it is set to the tritium gas flow-generator 30
Downstream.The concentration for being used to monitor the saturation tritium gas stream that the tritium gas flow-generator 30 generates to school tritium air monitor 50.
The saturation tritium gas stream that the tritium gas stream circulating pump 60 is used to generate for the tritium gas flow-generator 30 is along the closure
Circulation provides power in circulation loop 10.
It is appreciated that the tritium gas flow-generator system further includes tritium gas stream buffer cell 70, for stablizing tritium gas stream stream
Speed reduces its flow velocity, is recycled convenient for recovery unit 80.The tritium gas stream buffer cell 70 is set to the closed loop
In 10, and the arrival end of the tritium gas stream buffer cell 70 is connected with the outlet end of the tritium gas stream circulating pump 60, the tritium
The outlet end of air-flow buffer unit 70 is connected with the arrival end of the tritium gas stream flow rate control unit 11.
It is appreciated that the tritium gas flow-generator system further includes recovery unit 80, after wait test, recycling is closed
Close the tritium gas stream in circulation loop 10.The arrival end of the recovery unit 80 is equipped with the second valve 81.The recovery unit 80 is also
Including one connection discharge tube 82 so that by the recovery unit 80 recovery processing after substance in remaining nitrogen discharge
Into external environment, the downstream of tritium gas stream circulating pump 60 is arranged in the recovery unit 80.
Before calibration experiments start, check the air-tightness of this system, when the arrival end of tritium gas stream circulating pump 60 and outlet end it
Between pressure difference when being 80kPa or so, pass through two pressure sensors 13 and observe vacuum conservation degree situation in circuit, it is desirable that circuit
Interior pressure change is no more than ± 5kPa for 24 hours, and after airtight test is normal, dry summary is passed through into circuit by nitrogen storage storage 20
Nitrogen with high pressure guarantees dry environment in circuit to drain the air in circuit, is supervised by the hygrometer 14 installed in circuit
Whether the aridity in survey time road reaches requirement of the relative humidity less than 0.1%, and the of nitrogen storage storage 20 is closed after meeting the requirements
One valve 21.Then tritium gas flow-generator 30 known to surabaya activity concentration is quickly accessed, tritium gas flow-generator 30 is then turned off
Inlet valve 31 and outlet valve 32, open temperature conditioning unit 40, adjust tritium gas flow-generator 30 in tritiated water temperature, to
After tritiated coolant-temperature gage is consistent with the preset temperature of temperature conditioning unit 40 in tritium gas flow-generator 30, entering for tritium gas flow-generator 30 is opened
Mouth valve 31 and outlet valve 32 then turn on tritium gas stream circulating pump 60, adjust tritium gas stream flow rate control unit 11 to ensure tritium
The bulging saturation tritium gas stream of flow generator 30, tritium gas stream flow rate control unit 11 can adjust tritium air-flow velocity size in real time and can be with
Record accumulation throughput and instantaneous velocity read the reading of stablizing to school tritium air monitor 50 under different tritium air-flow velocities, right
It carries out accurate alignment, makes calibration curve.Pass through the temperature change of tritium gas stream in two temperatures sensor 12 in real time observation circuit
Situation, circuit interior air-flow are buffered by tritium gas stream buffer cell 70.After experiment, it is first shut off tritium gas stream circulating pump
60, it is then shut off the inlet valve 31 and outlet valve 32 of tritium gas flow-generator 30, opens the second valve 81 of recovery unit 80,
Start recovery unit 80 by tritium air flow recovery remaining in circuit, by observing the reading to school tritium air monitor 50, until circuit
Stop tritium gas stream recovery operation after interior noresidue tritium gas stream.
To sum up, tritium gas flow-generator system of the present invention, the drum using drying nitrogen as tritium gas flow-generator 30
Bubble gas, avoids influence of the water content to bubbling in existing bubbling air；Using closed loop, effectively solve existing
The influence of fractionation factor in some Bubbling methods is improved to the accurate alignment of tritium air monitor, and avoid that radgas leaks can
It can property.
A kind of tritium gas stream generating method of the tritium gas flow-generator system of constant density, comprising the following steps:
1), circuit airtight test: closed loop 10 is no more than ± 5kPa in interior pressure change for 24 hours, and air-tightness is just
Often；
2), circuit empties: after airtight test is normal, being passed through by nitrogen storage storage 20 into closed loop 10 dry
The nitrogen of dry slightly high pressure guarantees dry environment in closed loop 10 to drain the air in closed loop 10；
3), tritium gas stream occurs: after humidity is met the requirements in closed loop 10, quickly accessing known to surabaya activity concentration
Tritium gas flow-generator 30, be then turned off the inlet valve 31 and outlet valve 32 of tritium gas flow-generator 30, open temperature conditioning unit
40, the temperature of the tritiated water in tritium gas flow-generator 30 is adjusted, to tritiated coolant-temperature gage and temperature conditioning unit in tritium gas flow-generator 30
After 40 preset temperature is consistent, the inlet valve 31 and outlet valve 32 of tritium gas flow-generator 30 are opened, tritium gas stream is then turned on
Circulating pump 60 adjusts tritium gas stream flow rate control unit 11 to ensure the bulging saturation tritium gas stream of tritium gas flow-generator 30, tritium gas stream stream
Fast control unit 11 can adjust tritium air-flow velocity size in real time and can recorde accumulation throughput and instantaneous velocity, in different tritium gas
It flows to read under flow velocity and stablizes reading to school tritium air monitor 50, accurate alignment is carried out to it, makes calibration curve.
The application employs nitrogen as the gas dry that can guarantee for bubbled gas into tritium gas flow-generator 30, avoids
The case where moisture in air drying is not thorough, dilutes surabaya in tritium gas flow-generator 30, can not bloat the tritium gas stream of constant density,
The design of closed circuit can effectively solve influence of the presence to calibration result of fractionation factor, and the two ensures tritium gas in system jointly
Stream activity concentration is constant, and therefore, the present invention can make tritium gas flow-generator persistently bloat the saturation tritium gas stream of constant density, be bubbled
Surabaya constant mass is constant in journey, and no replacement is required, it can be achieved that accurate alignment to tritium air monitor.Present application addresses tritium monitorings
The problem of instrument magnitude tracing is, it can be achieved that nuclear facilities large size nuclear power unit, military isotope production reactor, military isotopic content are surveyed
Examination hall institute, the airborne tritium monitoring of military isotope packing field of employment etc. provide weight for nuclear facilities safe operation and accident conditions
The analysis foundation wanted, accurately reflects the operating condition of nuclear facilities.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of tritium gas flow-generator system of constant density, which is characterized in that including closed loop (10), the closure
Tritium gas flow-generator (30) is disposed on circulation loop (10), to school tritium air monitor (50) and tritium gas stream circulating pump
(60), the temperature conditioning unit (40) with tritium gas flow-generator (30) cooperation, temperature control are additionally provided on the closed loop (10)
The arrival end of unit (40) and outlet end are provided with temperature sensor (12), the arrival end of the tritium gas stream circulating pump (60) and
Outlet end is provided with pressure sensor (13), the temperature conditioning unit (40) and wet to be provided between school tritium air monitor (50)
Degree meter (14), further includes the nitrogen storage storage (20) being connected to tritium gas flow-generator (30), the nitrogen storage storage (20) is used for
Drying nitrogen is provided for closed loop (10).
2. a kind of tritium gas flow-generator system of constant density according to claim 1, which is characterized in that the closure is followed
Recovery unit (80) are additionally provided in loop back path (10)；The recovery unit (80) is for recycling in closed loop (10)
Tritium gas stream.
3. a kind of tritium gas flow-generator system of constant density according to claim 2, which is characterized in that the recycling is single
The arrival end of first (80) is equipped with the second valve (81)；The recovery unit (80) further includes the discharge tube (82) of a connection.
4. a kind of tritium gas flow-generator system of constant density according to claim 1, which is characterized in that the closure is followed
Tritium gas stream flow rate control unit (11) is provided in loop back path (10), the tritium gas stream flow rate control unit (11) is arranged in nitrogen
Between reservoir (20) and tritium gas flow-generator (30).
5. a kind of tritium gas flow-generator system of constant density according to claim 4, which is characterized in that the closure is followed
Tritium gas stream buffer cell (70) is additionally provided in loop back path (10)；The tritium gas stream buffer cell (70) is for stablizing tritium gas stream stream
Speed, the arrival end of the tritium gas stream buffer cell (70) are connected with the outlet end of the tritium gas stream circulating pump (60), the tritium
The outlet end of air-flow buffer unit (70) is connected with the arrival end of the tritium gas stream flow rate control unit (11).
6. a kind of tritium gas flow-generator system of constant density according to claim 1, which is characterized in that the tritium gas stream
The arrival end of generator (30) and outlet end are respectively equipped with inlet valve (31) and outlet valve (32).
7. a kind of tritium gas flow-generator system of constant density according to claim 1, which is characterized in that the nitrogen storage
The outlet end of storage (20) is equipped with the first valve (21).
8. a kind of such as a kind of described in any item tritium gas stream generations of the tritium gas flow-generator system of constant density of claim 1-7
Method, which comprises the following steps:
1), circuit airtight test: closed loop (10) are no more than ± 5kPa in interior pressure change for 24 hours, and air-tightness is normal；
2), circuit empties: after airtight test is normal, being passed through by nitrogen storage storage (20) into closed loop (10) dry
The dry nitrogen with high pressure guarantees closed loop (10) interior dry environment to drain the air in closed loop (10)；
3), tritium gas stream occurs: after closed loop (10) interior humidity is met the requirements, quickly accessing known to surabaya activity concentration
Tritium gas flow-generator (30) is then turned off the inlet valve (31) and outlet valve (32) of tritium gas flow-generator (30), opens temperature
It controls unit (40), the temperature of the tritiated water in tritium gas flow-generator (30) is adjusted, to tritiated water temperature in tritium gas flow-generator (30)
After degree is consistent with the preset temperature of temperature conditioning unit (40), the inlet valve (31) and outlet valve of tritium gas flow-generator (30) are opened
(32), tritium gas stream circulating pump (60) is then turned on, adjusts tritium gas stream flow rate control unit (11) to ensure tritium gas flow-generator
(30) bulging saturation tritium gas stream, tritium gas stream flow rate control unit (11) can adjust tritium air-flow velocity size in real time and can recorde tired
Pneumatosis flow and instantaneous velocity, under different tritium air-flow velocities read to school tritium air monitor (50) stablize reading, to its into
Row accurate alignment, makes calibration curve.
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| CN201610934329.4A CN106680864B (en) | 2016-11-01 | 2016-11-01 | A kind of tritium gas flow-generator system and method for constant density |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015266A (en) * | 2017-05-22 | 2017-08-04 | 中国原子能科学研究院 | A kind of calibration system and its scaling method of flow gas environment ion-chamber tritium concentration monitor |
| CN110954939B (en) * | 2019-12-24 | 2021-11-02 | 中国原子能科学研究院 | Tritium monitor laboratory calibrating device |
| CN112068184B (en) * | 2020-09-15 | 2022-04-15 | 中国核动力研究设计院 | Device and method for directly measuring efficiency of radioactive source |
| CN114870411B (en) * | 2022-04-11 | 2022-12-23 | 中国人民解放军火箭军工程大学 | Multi-concentration tritiated water vapor generation device |
| CN114879246B (en) * | 2022-04-11 | 2022-11-08 | 中国人民解放军火箭军工程大学 | Multi-concentration tritiated water vapor generation method |
| CN114879245B (en) * | 2022-04-11 | 2022-12-02 | 中国人民解放军火箭军工程大学 | On-spot calibrating device of tritium monitor in air based on closed circulation loop |
| CN114624759B (en) * | 2022-04-11 | 2022-11-08 | 中国人民解放军火箭军工程大学 | Closed circulation loop-based on-site calibration method for tritium monitor in air |
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