CN106229019A - A kind of irradiation after-burning charge bar Diameter Measurement System under water and measuring method thereof - Google Patents
A kind of irradiation after-burning charge bar Diameter Measurement System under water and measuring method thereof Download PDFInfo
- Publication number
- CN106229019A CN106229019A CN201610520485.6A CN201610520485A CN106229019A CN 106229019 A CN106229019 A CN 106229019A CN 201610520485 A CN201610520485 A CN 201610520485A CN 106229019 A CN106229019 A CN 106229019A
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- under water
- diameter measurement
- irradiation
- claw
- fuel
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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
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a kind of irradiation after-burning charge bar Diameter Measurement System under water, including Spent Fuel Pool, be provided with the diameter measurement unit towards fuel assembly in described Spent Fuel Pool, diameter measurement unit connects signal acquiring and processing system.The present invention is easy to operate, changed by the small displacement between contact chip, change in displacement is converted into coil mutual inductance index variation, and then it is converted into voltage, finally realize the conversion of non electrical quantity and electricity, quickly diameter measurement, the contact signal of telecommunication transmission conversion regime of employing under water of fuel assembly periphery fuel rod can be realized at the scene in the Spent Fuel Pool very first time, certainty of measurement and detection efficiency can be greatly improved.
Description
Technical field
The irradiation post fuel component pool frontier inspection that the invention belongs to nuclear fuel cycle looks into field, is specifically related to a kind of irradiation after-burning
Charge bar Diameter Measurement System under water and measuring method thereof.
Background technology
The power peak factor that Nuclear Plant is high when high burnup, the change of long circulating water chemistry, low leakage etc. are day by day
Under the conditions of harsh use, easily cause fuel assembly deformation and heap recycling cannot be returned, fuel rod through irradiation generation swelling,
Even damaged.The effective means that pool side Examined effect is evaluated as fuel assembly in-pile irradiation stability and integrity etc., undertakes
The vital task ensureing nuclear plant safety operation.
Traditional fuel rod diameter measuring method typically uses the means such as slide gauge, laser micrometer, Zaser contourgraph,
Subaqueous survey typically uses image method, laser optical method and ultrasonic method of measuring.Measuring for fuel rod under water, traditional method is measured
Precision and work efficiency are the highest.Accordingly, it would be desirable to set up the new technique of a kind of applicable fuel rod diameter measurement under water.
Summary of the invention
The technical problem to be solved is to there is certainty of measurement and work during existing fuel rod diameter measurement under water
Inefficient problem, it is provided that a kind of irradiation after-burning charge bar Diameter Measurement System under water and measuring method thereof, passes through contact chip
Between small displacement change, change in displacement is converted into coil mutual inductance index variation, and then is converted into voltage, finally realize non-
Electricity and the conversion of electricity, it is achieved the accurate measurement of irradiation post fuel assembly periphery fuel rod diameter.
The present invention is achieved through the following technical solutions:
A kind of irradiation after-burning charge bar Diameter Measurement System under water, including Spent Fuel Pool, is provided with court in described Spent Fuel Pool
To the diameter measurement unit of fuel assembly, diameter measurement unit connects signal acquiring and processing system.For fuel rod water
During lower diameter measurement, traditional measuring method typically uses the means such as slide gauge, laser micrometer, Zaser contourgraph, under water
Measure and typically use image method, laser optical method and ultrasonic method of measuring.Measure for fuel rod under water, traditional method certainty of measurement
The highest with work efficiency.Accordingly, it would be desirable to set up the new technique of a kind of applicable fuel rod diameter measurement under water.Fuel rod diameter under water
Measurement technology, as the important component part of pool side Examined effect, is to utilize electromagnetic induction principle, by the change of tested displacement
It is converted into the mutual inductance change of transformer coil, then is converted into the variable quantity output of voltage by measuring circuit, it is achieved by non-electrical
Amount is to the dimension measurement method of electricity conversion.This programme uses scissor measuring probe contact chip, it is possible to preferably with fuel rod
Surface contact does not results in again fuel rod surface secondary damage.Changed by the small displacement between contact chip, dexterously by position
Move change and be converted into coil mutual inductance index variation, and then be converted into voltage, finally realize the conversion of non electrical quantity and electricity, it is achieved spoke
According to the accurate measurement of post fuel assembly periphery fuel rod diameter, certainty of measurement and detection efficiency are greatly improved.This is prior art
The effect not reached, does not has technical staff to expect this measuring method simultaneously yet.
Diameter measurement unit includes underwater lens, measures claw, sensor and drive mechanism, and described drive mechanism can
Moving horizontally towards fuel assembly periphery fuel rod, underwater lens is preferably two, observes the combustion of fuel assembly periphery respectively
Charge bar and measuring probe, underwater lens can be selectively mounted in drive mechanism or measure on claw, for the ease of to measurement
Unit is supported, and is provided with column in Spent Fuel Pool, and column is provided with work platforms, and drive mechanism is arranged on work
On platform, underwater lens, measurement claw, sensor are arranged in drive mechanism, sensor and signal acquiring and processing system
Connect, be provided with measuring probe measuring on claw, and measuring probe is connected with sensor, along with the traverse measurement of drive mechanism
Claw is inserted into fuel assembly periphery fuel rod so that between two contact chips of measuring probe, displacement changes, and measures
Probe is arranged on measurement claw and is connected with sensor, is as the parts with fuel rod wall contacts.Above-mentioned parts are all
Existing parts, it is possible to be the most directly commercially available, easy to operate after combination, can be at the scene in the Spent Fuel Pool very first time
Realize the quick under water diameter measurement of fuel assembly periphery fuel rod, the contact signal of telecommunication transmission conversion regime of employing, permissible
Certainty of measurement and detection efficiency are greatly improved.
Sensor is LVDT sensor.LVDT is linear variable difference transformer abbreviation, belongs to linear displacement transducer.It
By a primary coil, two secondary coils, iron core, coil rack, the parts composition such as shell.In LVDT work process, unshakable in one's determination
Motion otherwise can not will produce non-linear value beyond the range of linearity of coil, the most all of LVDT all has a linear model
Enclose.This programme uses LVDT sensor so that it is able to receive that the micro-displacement measuring in claw between the contact chip of measuring probe
Amount change, in sensor, the mutual inductance of transformer coil carries out corresponding change, so that measurement is more accurate.
A kind of irradiation after-burning charge bar diameter measuring method under water, comprises the following steps:
(1) adjust the angle of underwater lens, make underwater lens can observe fuel assembly periphery fuel rod and measuring probe respectively；
(2) the three-dimensional frame position that fuel assembly winches to Diameter Measurement System in Spent Fuel Pool is fixed, three-dimensional frame be for
Being fixed fuel assembly and fuel rod, equipment can only prevent it from rocking and causing measurement from one the direction turnover of three-dimensional frame
Inaccurate；
(3) operation driving mechanisms control measurement claw travels forward, and measures claw and inserts fuel rod region, fuel assembly periphery, surveys
Amount claw and a wherein fuel rod wall contacts, continue to move to so that between two contact chips of measuring probe, displacement becomes
Changing, the change of displacement causes the mutual inductance of LVDT sensor transformer coil to change；
(4) by cable coil mutual inductance index variation amount it is transferred to signal acquiring and processing system and is converted into the change of voltage
Change amount exports, and is pre-designed the processing contrast rod containing multiple diameter specification, uses the spiral micrometer through verification to contact respectively
Measuring every kind of contrast rod position and obtain scale value, traverse measurement claw snaps in contrast rod (13) of correspondence and obtains magnitude of voltage, by carving
Angle value and the corresponding relation manufacturing system calibration curve of magnitude of voltage, further according to system calibrating curve, measured magnitude of voltage by reality anti-
Push away and obtain fuel rod diameter value.
In the technical program, use scissor measuring probe contact chip, it is possible to preferably contact with fuel rod surface and
Do not result in fuel rod surface secondary damage.Changed by the small displacement between contact chip, dexterously change in displacement is converted
For coil mutual inductance index variation, and then it is converted into voltage, finally realizes the conversion of non electrical quantity and electricity, it is achieved irradiation post fuel group
The accurate measurement of part periphery fuel rod diameter, is greatly improved certainty of measurement and detection efficiency, and it is easy to operate, can be at the scene
The quick under water diameter measurement of fuel assembly periphery fuel rod, the contact telecommunications of employing is realized in the Spent Fuel Pool very first time
Number transmission conversion regime, certainty of measurement and detection efficiency can be greatly improved.Signal of telecommunication transmission is changed originally as existing technology,
The most not applying it to for irradiation after-burning charge bar diameter measurement under water in this area, this programme applies it to core combustion
The irradiation post fuel component pool frontier inspection of material circulation looks into field, for measuring irradiation after-burning charge bar diameter under water, achieves
The effect that existing measuring method is not reached, and the simplicity measuring operation is greatly improved, and the efficiency of measurement carries the most further
High.
The present invention compared with prior art, has such advantages as and beneficial effect: the present invention is easy to operate, can be at the scene
The quick under water diameter measurement of fuel assembly periphery fuel rod, the contact telecommunications of employing is realized in the Spent Fuel Pool very first time
Number transmission conversion regime, certainty of measurement and detection efficiency can be greatly improved.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application
Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is measuring principle figure of the present invention；
Fig. 2 is probe segment structural representation.
The parts title of labelling and correspondence in accompanying drawing:
1-fuel rod, 2-measuring probe, 3-LVDT sensor, 4-three-dimensional frame, 5-underwater lens, 6-drive mechanism, 7-column, 8-
Cable, 9-signal acquiring and processing system, 10-hall row hangs, 11-Spent Fuel Pool, and 12-measures claw, and 13-contrasts rod.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment:
As shown in Figure 1 and Figure 2, a kind of irradiation after-burning charge bar Diameter Measurement System under water, by installing main at Spent Fuel Pool 11
Erect post 7, will install on column 7 by diameter measurement unit under water, diameter measurement unit include underwater lens 5, measure claw 12,
LVDT sensor 3 and drive mechanism 6, drive mechanism 6 can move horizontally towards fuel assembly periphery fuel rod 1, water
Lower camera lens 5, measurement claw 12, LVDT sensor 3 are arranged in drive mechanism 6, LVDT sensor 3 and Signal acquiring and processing
System 9 connects, and is provided with measuring probe 2 measuring, and measuring probe 2 is connected with LVDT sensor 3, adjust under water on claw 12
The angle of camera lens 5, makes two underwater lens 5 can observe fuel assembly periphery fuel rod 1 and measuring probe 2 respectively；On column 7
Being provided with work platforms, drive mechanism 6 is arranged on work platforms.Utilize hall row to hang 10 and fuel assembly is winched to spentnuclear fuel water
In pond 11, three-dimensional frame 4 position of Diameter Measurement System is fixed；Operation drive mechanism 6 controls to measure claw 12 and travels forward, and surveys
Amount claw 12 inserts fuel rod 1 region, fuel assembly periphery, measures claw 12 and wherein fuel rod 1 wall contacts, continues
Between mobile two contact chips making measuring probe 2, displacement changes, and the change of displacement causes LVDT sensor 3 transformation
The mutual inductance change of device coil；By cable 8, coil mutual inductance index variation amount is transferred to signal acquiring and processing system 9
And the variable quantity being converted into voltage exports, by cable 8, coil mutual inductance index variation amount is transferred to Signal acquiring and processing
System 9 and be converted into voltage variable quantity output, be pre-designed containing multiple diameter specification processing contrast rod 13, processing contrast rod
The quantity of 13 is at least four kinds, and such guarantee processing contrast rod 13 has reference value accurately, uses the spiral shell through verification
Rotation micrometer contact measurement every kind respectively contrasts excellent 13 positions and obtains scale value, and traverse measurement claw 12 snaps in the contrast rod of correspondence
13 obtain magnitude of voltage, by the corresponding relation manufacturing system calibration curve of scale value Yu magnitude of voltage, further according to system calibrating curve, by
Actual magnitude of voltage of measuring is back-calculated to obtain fuel rod 1 diameter value.This method is travelled forward by driving mechanisms control measuring probe, inserts
Enter fuel assembly periphery fuel rod so that the displacement between two contact chips of measuring probe changes, and the change of displacement is drawn
Play the mutual inductance change of LVDT sensor transformer coil, by cable, coil mutual inductance index variation amount is transferred to signal
Gather with processing system and be converted into voltage variable quantity output, further according to the system calibrating between magnitude of voltage and actual measured value
Curve linear relationship obtains fuel rod diameter value.The present invention is easy to operate, can realize fuel in the Spent Fuel Pool very first time at the scene
The quick under water diameter measurement of assembly periphery fuel rod, the contact signal of telecommunication transmission conversion regime of employing, can be greatly improved
Certainty of measurement and detection efficiency.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should comprise
Within protection scope of the present invention.
Claims (6)
1. an irradiation after-burning charge bar Diameter Measurement System under water, including Spent Fuel Pool (11), it is characterised in that described weary combustion
Being provided with the diameter measurement unit towards fuel assembly in material pond (11), diameter measurement unit connects Signal acquiring and processing
System (9).
A kind of irradiation after-burning charge bar Diameter Measurement System under water the most according to claim 1, it is characterised in that described diameter
Measuring unit includes underwater lens (5), measures claw (12), sensor and drive mechanism (6), described drive mechanism (6) energy
Enough moving horizontally towards fuel assembly periphery fuel rod (1), underwater lens (5), measurement claw (12), sensor are respectively provided with
In drive mechanism (6), sensor and signal acquiring and processing system (9) connect, and are provided with measurement measuring on claw (12)
Pop one's head in (2), and measuring probe (2) is connected with sensor, along with the traverse measurement claw (12) of drive mechanism (6) is inserted into combustion
Material assembly periphery fuel rod (1) so that between two contact chips of measuring probe (2), displacement changes.
A kind of irradiation after-burning charge bar Diameter Measurement System under water the most according to claim 2, it is characterised in that described weary combustion
Being provided with column (7) in material pond (11), column (7) is provided with work platforms, drive mechanism (6) is arranged on work platforms
On.
A kind of irradiation after-burning charge bar Diameter Measurement System under water the most according to claim 2, it is characterised in that described sensing
Device is LVDT sensor (3).
A kind of irradiation after-burning charge bar Diameter Measurement System under water the most according to claim 2, it is characterised in that described under water
The quantity of camera lens (5) is two.
6. an irradiation after-burning charge bar diameter measuring method under water, it is characterised in that comprise the following steps:
(1) adjust underwater lens (5) angle, make underwater lens (5) can observe respectively fuel assembly periphery fuel rod (1) and
Measuring probe (2)；
(2) three-dimensional frame (4) position that fuel assembly winches to Diameter Measurement System in Spent Fuel Pool (11) is fixed；
(3) operation drive mechanism (6) control measurement claw (12) travels forward, and measures claw (12) and inserts the combustion of fuel assembly periphery
Charge bar (1) region, measures claw (12) and wherein fuel rod (1) wall contacts, continues to move to so that measuring probe (2)
Between two contact chips, displacement changes, and the change of displacement causes the mutual inductance of LVDT sensor (3) transformer coil
Change；
(4) by cable (8) coil mutual inductance index variation amount it is transferred to signal acquiring and processing system (9) and is converted into electricity
The variable quantity output of pressure, is pre-designed processing contrast rod (13) containing multiple diameter specification, uses the spiral micrometer through verification
Instrument obtains scale value in contact measurement every kind contrast rod (13) position respectively, and traverse measurement claw (12) snaps in the contrast rod of correspondence
(13) magnitude of voltage is obtained, by the corresponding relation manufacturing system calibration curve of scale value Yu magnitude of voltage, further according to system calibrating curve,
Measured magnitude of voltage by reality and be back-calculated to obtain fuel rod (1) diameter value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610520485.6A CN106229019B (en) | 2016-07-05 | 2016-07-05 | The underwater Diameter Measurement System of one kind irradiation after-burning charge bar and its measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610520485.6A CN106229019B (en) | 2016-07-05 | 2016-07-05 | The underwater Diameter Measurement System of one kind irradiation after-burning charge bar and its measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106229019A true CN106229019A (en) | 2016-12-14 |
| CN106229019B CN106229019B (en) | 2018-01-30 |
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| CN201610520485.6A Active CN106229019B (en) | 2016-07-05 | 2016-07-05 | The underwater Diameter Measurement System of one kind irradiation after-burning charge bar and its measuring method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039092A (en) * | 2017-05-31 | 2017-08-11 | 岭澳核电有限公司 | Fuel rod detection device |
| CN107063101A (en) * | 2017-05-31 | 2017-08-18 | 中广核研究院有限公司 | Irradiated fuel assembly measurement apparatus and measuring method |
| CN110853778A (en) * | 2019-11-18 | 2020-02-28 | 中国核动力研究设计院 | Irradiation device for realizing real-time measurement of axial length change of fuel element |
| CN117612753A (en) * | 2023-11-17 | 2024-02-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | Automatic detection device and method for gap between fuel rods of nuclear fuel assembly |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039092A (en) * | 2017-05-31 | 2017-08-11 | 岭澳核电有限公司 | Fuel rod detection device |
| CN107063101A (en) * | 2017-05-31 | 2017-08-18 | 中广核研究院有限公司 | Irradiated fuel assembly measurement apparatus and measuring method |
| CN107039092B (en) * | 2017-05-31 | 2019-03-19 | 岭澳核电有限公司 | Fuel rod detection device |
| CN110853778A (en) * | 2019-11-18 | 2020-02-28 | 中国核动力研究设计院 | Irradiation device for realizing real-time measurement of axial length change of fuel element |
| CN117612753A (en) * | 2023-11-17 | 2024-02-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | Automatic detection device and method for gap between fuel rods of nuclear fuel assembly |
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| Publication number | Publication date |
|---|---|
| CN106229019B (en) | 2018-01-30 |
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