CN109493984A - A kind of Nuclear Plant breakage on-line measuring device - Google Patents
A kind of Nuclear Plant breakage on-line measuring device Download PDFInfo
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- CN109493984A CN109493984A CN201811334052.7A CN201811334052A CN109493984A CN 109493984 A CN109493984 A CN 109493984A CN 201811334052 A CN201811334052 A CN 201811334052A CN 109493984 A CN109493984 A CN 109493984A
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- radiation detector
- gas
- unit
- gamma
- sampling room
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/06—Devices or arrangements for monitoring or testing fuel or fuel elements outside the reactor core, e.g. for burn-up, for contamination
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
- G21C17/102—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain the sensitive element being part of a fuel element or a fuel assembly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a kind of Nuclear Plant breakage on-line measuring devices, including gas sampling room, gamma radiation detector, β radiation detector, air extractor, getter device and nuclear data processing device；The gamma radiation detector and β radiation detector are set on gas sampling room, and gamma radiation detector detection gas sample indoor gamma-rays particle, and β radiation detector detection gas sample indoor β ray particle.A kind of Nuclear Plant breakage on-line measuring device of the present invention, propose that a kind of Nuclear Plant for meeting technology based on radioactivity survey β-γ is damaged to sob suction detection device online, influence of the device background to environmental factor is reduced using the gamma-ray relevance of β-, to improve the detection limit of device, and then guarantee also to be accurately judged to whether fuel assembly occurs breakage under the low-activity of device, improve the accuracy of detection.
Description
Technical field
The present invention relates to technical field of nuclear power, and in particular to a kind of Nuclear Plant breakage on-line measuring device.
Background technique
Nuclear Plant is damaged to sob that inhale detection device be that a kind of whether there is or not breakages for qualitative detection fuel assembly online
Experimental rig, at present experimental rig there are two types of testing principle, one type equipment is equipped with a γ radiation detection
Device determines the intensity of Characteristic radionuclides in sample by the gamma-rays energy spectrum analysis to gas sample, then according to the intensity with
Whether background strength per time unit ratio in judgement fuel element occurs breakage；Another kind of equipment is equipped with a β radiation detector,
The intensity of Characteristic radionuclides in sample is determined by the Beta-ray ionization meter to gas sample, then according to the intensity and this
Bottom unit time intensity rate judges whether fuel element occurs breakage.All there are two common disadvantages for these two types of equipment: being used for
The radioactive background data for making a decision calculating are big by such environmental effects；Leakage is easy to happen when gas sample radioactive level is lower
Sentence.
Summary of the invention
The technical problem to be solved by the present invention is to existing Nuclear Plant on-line measuring device, all there are two altogether
Same disadvantage: the radioactive background data for making a decision calculating are big by such environmental effects；It is lower in gas sample radioactive level
When be easy to happen and fail to judge, and it is an object of the present invention to provide a kind of Nuclear Plant breakage on-line measuring device, solves the above problems.
The present invention is achieved through the following technical solutions:
A kind of Nuclear Plant breakage on-line measuring device, including gas sampling room, gamma radiation detector, β radiation
Detector, air extractor, getter device and nuclear data processing device；The gamma radiation detector and β radiation detector are set to
On gas sampling room, and gamma radiation detector detection gas sample indoor gamma-rays particle, and β radiation detector detection gas are adopted
The indoor β ray particle of sample；The gamma radiation detector and β radiation detector are connected to nuclear data processing device, and γ is radiated
The data of acquisition are sent to nuclear data processing device by detector and β radiation detector；The air extractor is connected to gas and adopts
Specimen chamber, and air extractor generates negative pressure in gas sampling room；The getter device is connected to gas sampling room, and getter device
The gas of fuel assembly is sucked into gas sampling room.
In the prior art, all there are two common disadvantages for existing Nuclear Plant on-line measuring device: for doing
Judge that the radioactive background data calculated are big by such environmental effects；It is easy to happen and fails to judge when gas sample radioactive level is lower.
The present invention is in application, the gas of fuel assembly enters getter device, and air extractor generates the gas that negative pressure makes fuel assembly
Into in gas sampling room, in gas sampling room, β ray particle and gamma-rays grain that radgas is launched due to decay
Son will be detected that then gas sampling room is discharged by air extractor in these gases by gamma radiation detector and β radiation detector.
β ray particle and the data of gamma-rays particle acquisition are received and processed by nuclear data processing device.The invention proposes a kind of bases
Suction detection device is sobbed online in the Nuclear Plant breakage that radioactivity survey β-γ meets technology, utilizes the gamma-ray pass β-
Connection property reduces influence of the device background to environmental factor, to improve the detection limit of device, and then guarantees the low radiation of device
Property it is horizontal under can also be accurately judged to fuel assembly breakage whether occurs, improve the accuracy of detection.
Further, the air extractor includes the air inlet being sequentially communicated, negative pressure generating unit and exhaust outlet, and negative pressure
Generating unit is connected to gas sampling room and generates negative pressure in gas sampling room.
For the present invention in application, negative pressure generating unit provides negative pressure into gas sampling room, getter device sobs suction fuel assembly
Gas；After completing detection, the gas of fuel assembly is discharged with gas piping through negative pressure generating unit.
Further, the getter device includes the gas pretreatment unit being sequentially communicated, air entry and sobs suction sleeve；Institute
State the gas sobbed and inhale sleeve acquisition fuel assembly；The gas of the fuel assembly enters gas after being pre-processed by gas pretreatment unit
Sampler body room.
The present invention is in application, sob the gas for inhaling sleeve acquisition fuel assembly, and enter gas pretreatment list by air entry
Member, gas pretreatment unit the pretreatments such as are dried to gas and are transported to gas sampling room again, pass through getter device and pumping
The cooperation of device realizes the lasting detection to fuel assembly gas.
Further, the nuclear data processing device includes sequentially connected data collection processing unit and department of computer science
System；The data collection processing unit is sent out after receiving the data preliminary treatment that gamma radiation detector and β radiation detector acquire
It send to computer system.
Further, the data collection processing unit includes multiple tracks unit, meets unit and counting unit；The γ
The data of acquisition are sent to multiple tracks unit and are converted into multichannel signal by radiation detector；The β radiation detector is by the number of acquisition
According to being sent to counting unit and analysis of accounts；The number for meeting unit and receiving gamma radiation detector and the acquisition of β radiation detector
According to and carry out meeting analysis.
The present invention in application, due to selection Characteristic radionuclides decay when can launch β and gamma-rays simultaneously, utilize
The β launched and gamma-ray relevance, meet technology using electronic signal, and the background count of instrument can be greatly reduced, from
And the accuracy of equipment judgement is improved, reduce the probability of fuel element missing inspection erroneous judgement.Suction detection mode, the present apparatus are sobbed compared to tradition
β-ray detector and gamma ray detector are used simultaneously, and exhaustively data are carried out to the β ray and gamma-rays of electromagnetic radiation and are received
Collection had not only been compatible with the correlation function of existing two classes difference testing principle equipment simultaneously, but also has met technology lowering apparatus using signal
Background level, lower 2 orders of magnitude of state of the art radioactive activity below may be implemented and accurately measure, so that fuel is first
Part breakage judgement is more accurate.
Further, the computer system continuously analyzes the multichannel signal from data collection processing unit, meter
Number analyzes signal and meets analysis signal, and sounds an alarm when arbitrarily signal is more than threshold value all the way.
Further, the gas of the fuel assembly is fission gas.
Further, shield is arranged in the gas sampling outdoor.
Compared with prior art, the present invention having the following advantages and benefits:
1, a kind of Nuclear Plant breakage on-line measuring device of the present invention proposes a kind of based on radioactivity survey β-
The Nuclear Plant breakage that γ meets technology sobs suction detection device online, and the gamma-ray relevance of β-is utilized to reduce device sheet
Influence of the bottom to environmental factor, to improve the detection limit of device, and then guaranteeing also can be quasi- under the low-activity of device
Really judge whether fuel assembly occurs breakage, improves the accuracy of detection；
2, a kind of Nuclear Plant breakage on-line measuring device of the present invention, utilizes the β and gamma-ray pass launched
Connection property, meets technology using electronic signal, the background count of instrument can be greatly reduced, to improve the accurate of equipment judgement
Property, reduce the probability of fuel element missing inspection erroneous judgement.Suction detection mode is sobbed compared to tradition, the present apparatus uses β-ray detector simultaneously
And gamma ray detector, exhaustively data collection is carried out to the β ray and gamma-rays of electromagnetic radiation, has both been compatible with simultaneously existing
The correlation function of two class difference testing principle equipment, and meet using signal the background level of technology lowering apparatus, it may be implemented
Lower 2 orders of magnitude of state of the art radioactive activity below accurately measures, so that fuel element failure judgement is more accurate.
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 schematic structural view of the invention；
Fig. 2 is signal processing system figure of the present invention.
Label and corresponding parts title in attached drawing:
1- gas sampling room, 2- gamma radiation detector, 3- computer system, 4- data collection processing unit, 5- gas
Pretreatment unit, 6- β radiation detector, 7- shield, 8- negative pressure generating unit, 9- sob suction sleeve, 10- fuel assembly, and 11- takes out
Device of air, 12- getter device, 13- nuclear data processing device.
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 Nuclear Plant breakage on-line measuring device of the present invention, including gas sampling room 1, γ
Radiation detector 2, β radiation detector 3, air extractor 11, getter device 12 and nuclear data processing device 13；The γ radiation is visited
It surveys device 2 and β radiation detector 3 is set on gas sampling room 1, and the γ in 2 detection gas sampler chamber 1 of gamma radiation detector is penetrated
Line particle, the β ray particle in 3 detection gas sampler chamber 1 of β radiation detector；The gamma radiation detector 2 and β radiation detection
Device 3 is connected to nuclear data processing device 13, and the data of acquisition are sent to nucleus number by gamma radiation detector 2 and β radiation detector 3
According to processing unit 13；The air extractor 11 is connected to gas sampling room 1, and air extractor 11 generates in gas sampling room 1
Negative pressure；The getter device 12 is connected to gas sampling room 1, and getter device 12 adopts the gas sucking gas of fuel assembly 10
Specimen chamber 1.
When the present embodiment is implemented, the gas of fuel assembly 10 enters getter device 12, and air extractor 11 generates negative pressure and makes
The gas for obtaining fuel assembly 10 enters in gas sampling room 1, and in gas sampling room 1, radgas is launched due to decay
β ray particle and gamma-rays particle will be detected that then these gases pass through by gamma radiation detector 2 and β radiation detector 6
Gas sampling room 1 is discharged in air extractor 11.β ray particle and the data of gamma-rays particle acquisition are connect by nuclear data processing device 13
It receives and handles.The invention proposes a kind of Nuclear Plant breakages for meeting technology based on radioactivity survey β-γ to sob online
Detection device is inhaled, influence of the device background to environmental factor is reduced using the gamma-ray relevance of β-, to improve the spy of device
Lower limit is surveyed, and then guarantees also be accurately judged to whether fuel assembly occurs breakage under the low-activity of device, improves inspection
The accuracy of survey.
Embodiment 2
On the basis of embodiment 1, the air extractor 11 includes the air inlet being sequentially communicated, negative pressure generation to the present embodiment
Unit 8 and exhaust outlet, and negative pressure generating unit 8 is connected to gas sampling room 1 and generates negative pressure in gas sampling room 1.
When the present embodiment is implemented, negative pressure generating unit 8 provides negative pressure into gas sampling room 1, and getter device 12 sobs suction fuel
Expect the gas of component；After completing detection, the gas of fuel assembly 10 is discharged with gas piping through negative pressure generating unit 8.
Embodiment 3
On the basis of embodiment 1, the getter device 12 includes the gas pretreatment unit being sequentially communicated to the present embodiment
5, air entry and sob inhale sleeve 9；Described sob inhales the gas that sleeve 9 acquires fuel assembly 10；The gas quilt of the fuel assembly 10
Gas pretreatment unit 5 enters gas sampling room 1 after pre-processing.
When the present embodiment is implemented, the gas for inhaling the acquisition fuel assembly 10 of sleeve 9 is sobbed, and gas is entered by air entry and is located in advance
Unit 5 is managed, gas pretreatment unit 5 pretreatments such as is dried to gas and is transported to gas sampling room 1 again, passes through getter device
12 and air extractor 11 cooperation, realize the lasting detection to 10 gas of fuel assembly.
Embodiment 4
As shown in Fig. 2, the present embodiment is on the basis of embodiment 1, the nuclear data processing device 13 includes being sequentially connected
Data collection processing unit 4 and computer system 5；The data collection processing unit 4 receives 2 He of gamma radiation detector
Computer system 5 is sent to after the data preliminary treatment that β radiation detector 3 acquires.The data collection processing unit 4 includes
Multiple tracks unit meets unit and counting unit；The data of acquisition are sent to multiple tracks unit and are converted by the gamma radiation detector 2
Multichannel signal；The data of acquisition are sent to counting unit and analysis of accounts by the β radiation detector 3；The unit that meets connects
It receives the data that gamma radiation detector 2 and β radiation detector 3 acquire and carries out meeting analysis.The continuously analysis of computer system 5
From the multichannel signal of data collection processing unit 4, analysis of accounts signal and meet analysis signal, and is arbitrarily believing all the way
Number be more than threshold value when sound an alarm.
When the present embodiment is implemented, since β and gamma-rays can be launched simultaneously when the Characteristic radionuclides of selection decay, benefit
With the β and gamma-ray relevance launched, technology is met using electronic signal, the background count of instrument can be greatly reduced,
To improve the accuracy of equipment judgement, the probability of fuel element missing inspection erroneous judgement is reduced.Suction detection mode, this dress are sobbed compared to tradition
β-ray detector and gamma ray detector are set while being used, exhaustively data are carried out to the β ray and gamma-rays of electromagnetic radiation
It collects, has not only been compatible with the correlation function of existing two classes difference testing principle equipment simultaneously, but also meet technology using signal to reduce instrument
The background level of device may be implemented lower 2 orders of magnitude of state of the art radioactive activity below and accurately measure, so that fuel
Element rupture judgement is more accurate.
Embodiment 5
For the present embodiment on the basis of Examples 1 to 4, the present apparatus can use integrated cabinet frame mode, by gas
Sampler chamber 1, gamma radiation detector 2, computer system 3, data collection processing unit 4, gas pretreatment unit 5, β radiation are visited
It surveys device 6, shield 7, negative pressure generating unit 8 and associated gas and electrical circuit is mounted together.Wherein gas sampling room 1 and γ
Radiation detector 2, β radiation detector 6 are mounted on the inside of shield 7, the air inlet and air outlet of gas sampling room 1 respectively at
Gas pretreatment unit 5 is connected with negative pressure generating unit 8, gas pretreatment unit 5 to sob the gas inhaled and be dried it is equal in advance
Processing, negative pressure generating unit 8 provide power resources to sob the flowing of air-breathing body.When work, device air inlet external compressed air,
Compressed gas generates the negative pressure lower than atmospheric environment after negative pressure generating unit 8, sobs suction effect to generate, drives therewith
Connected gas return path sucks gas sampling room 1 through gas pretreatment unit 5 for the gas sobbed inhale in sleeve is located at.It is adopted in gas
Specimen chamber, the β ray particle and gamma-rays particle that radgas is launched due to decay will be placed in outside gas sampling room 1
Gamma radiation detector 2 and β radiation detector 6 detected by, gamma radiation detector 2 and β radiation detector 6 are respectively β ray
Particle detector and gamma-rays particle detector, fission gas is constantly as gas piping flows through the discharge dress of negative pressure generating unit 8
It sets.
Gamma radiation detector 2 and β radiation detector 6 are connected by electric wire with data collection unit 4, data collection list
Member 4 provides power supply for radiation detector and is tentatively believed the signal exported by gamma radiation detector 2 and β radiation detector 6
Number processing, the signal that wherein gamma-rays particle detector generates are converted into multichannel signal for later period energy spectrum analysis all the way, and one
Road is sent into coincident circuit and carries out meeting analysis；The signal that β ray particle detector generates is converted into counter signals use all the way
In analysis of accounts, it is sent into coincident circuit all the way and carries out meeting analysis.Data collection unit 4 by γ multichannel signal, meet output
Signal, β count signal are sent into subsequent computer system 3 and carry out data processing.
The γ multichannel signal that continuously analysis is sent from data collection processing unit 4 of computer system 3 meets output
The three road signal such as signal, β count signal can pass through external other display terminals when signal occurs beyond threshold value all the way for certain
Alarm is issued, and provides the judgement of detected fuel element failure.
Gamma radiation detector can be ion-chamber, scintillator-type, semiconductor or compound semiconductor or it is other can
To complete the detector of energy resolution measurement work.
Data collection processing unit includes signal amplification, height analysis, multiple tracks and single-channel count function.
Gas pretreatment unit includes gas-drying apparatus and pneumatic filter.
β radiation detector can be ion-chamber, Plastic scintillation figure, semi-conductor type detector.
Negative pressure generating unit can be the vacuum generator with Venturi effect, be also possible to vacuum pump etc. can generate it is negative
The device of pressure.
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 Nuclear Plant breakage on-line measuring device, which is characterized in that radiated including gas sampling room (1), γ
Detector (2), β radiation detector (3), air extractor (11), getter device (12) and nuclear data processing device (13)；The γ
Radiation detector (2) and β radiation detector (3) are set on gas sampling room (1), and gamma radiation detector (2) detection gas
Gamma-rays particle in sampler chamber (1), the β ray particle in β radiation detector (3) detection gas sampler chamber (1)；The γ spoke
It penetrates detector (2) and β radiation detector (3) is connected to nuclear data processing device (13), and gamma radiation detector (2) and β radiation
The data of acquisition are sent to nuclear data processing device (13) by detector (3)；The air extractor (11) is connected to gas sampling
Room (1), and air extractor (11) generates negative pressure in gas sampling room (1)；The getter device (12) is connected to gas sampling
Room (1), and the gas of fuel assembly (10) is sucked gas sampling room (1) by getter device (12).
2. a kind of Nuclear Plant breakage on-line measuring device according to claim 1, which is characterized in that the pumping
Device of air (11) includes the air inlet being sequentially communicated, negative pressure generating unit (8) and exhaust outlet, and negative pressure generating unit (8) is connected to
In gas sampling room (1) and the generation negative pressure in gas sampling room (1).
3. a kind of Nuclear Plant breakage on-line measuring device according to claim 1, which is characterized in that the suction
Device of air (12) include the gas pretreatment unit (5) being sequentially communicated, air entry and sob inhale sleeve (9)；Described sob inhales sleeve (9)
Acquire the gas of fuel assembly (10)；The gas of the fuel assembly (10) enters after being pre-processed by gas pretreatment unit (5)
Gas sampling room (1).
4. a kind of Nuclear Plant breakage on-line measuring device according to claim 1, which is characterized in that the core
Data processing equipment (13) includes sequentially connected data collection processing unit (4) and computer system (5)；The Nuclear Data
It is sent to after the data preliminary treatment that acquisition process unit (4) receives gamma radiation detector (2) and β radiation detector (3) acquires
Computer system (5).
5. a kind of Nuclear Plant breakage on-line measuring device according to claim 4, which is characterized in that the core
Data acquisition process unit (4) includes multiple tracks unit, meets unit and counting unit；The gamma radiation detector (2) will acquire
Data be sent to multiple tracks unit and be converted into multichannel signal；The data of acquisition are sent to counting list by the β radiation detector (3)
Member and analysis of accounts；Data and the progress for meeting unit and receiving gamma radiation detector (2) and β radiation detector (3) acquisition
Meet analysis.
6. a kind of Nuclear Plant breakage on-line measuring device according to claim 5, which is characterized in that the meter
Continuously analysis from the multichannel signal of data collection processing unit (4), analysis of accounts signal and meets point calculation machine system (5)
Signal is analysed, and is sounded an alarm when arbitrarily signal is more than threshold value all the way.
7. a kind of Nuclear Plant breakage on-line measuring device according to claim 1, which is characterized in that the combustion
The gas for expecting component (10) is fission gas.
8. a kind of Nuclear Plant breakage on-line measuring device according to claim 1, which is characterized in that the gas
Shield (7) are set outside sampler body room (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811334052.7A CN109493984B (en) | 2018-11-09 | 2018-11-09 | Nuclear power station fuel assembly damage on-line measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811334052.7A CN109493984B (en) | 2018-11-09 | 2018-11-09 | Nuclear power station fuel assembly damage on-line measuring device |
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| CN109493984A true CN109493984A (en) | 2019-03-19 |
| CN109493984B CN109493984B (en) | 2022-03-01 |
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Cited By (3)
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|---|---|---|---|---|
| CN110824541A (en) * | 2019-11-14 | 2020-02-21 | 南华大学 | 18F digital coincidence monitoring device and monitoring method |
| CN111145923A (en) * | 2019-11-26 | 2020-05-12 | 中广核工程有限公司 | Method for detecting damage of spent fuel assembly of nuclear power station |
| EP4174876A1 (en) * | 2021-11-02 | 2023-05-03 | Enusa Industrias Avanzadas S.A. S.M.E. | Device for detecting leaks in nuclear fuel elements inside storage containers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824541A (en) * | 2019-11-14 | 2020-02-21 | 南华大学 | 18F digital coincidence monitoring device and monitoring method |
| CN111145923A (en) * | 2019-11-26 | 2020-05-12 | 中广核工程有限公司 | Method for detecting damage of spent fuel assembly of nuclear power station |
| CN111145923B (en) * | 2019-11-26 | 2022-03-15 | 中广核工程有限公司 | Method for detecting damage of spent fuel assembly of nuclear power station |
| EP4174876A1 (en) * | 2021-11-02 | 2023-05-03 | Enusa Industrias Avanzadas S.A. S.M.E. | Device for detecting leaks in nuclear fuel elements inside storage containers |
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| Publication number | Publication date |
|---|---|
| CN109493984B (en) | 2022-03-01 |
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