CN106229019B - The underwater Diameter Measurement System of one kind irradiation after-burning charge bar and its measuring method - Google Patents
The underwater Diameter Measurement System of one kind irradiation after-burning charge bar and its measuring method Download PDFInfo
- Publication number
- CN106229019B CN106229019B CN201610520485.6A CN201610520485A CN106229019B CN 106229019 B CN106229019 B CN 106229019B CN 201610520485 A CN201610520485 A CN 201610520485A CN 106229019 B CN106229019 B CN 106229019B
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- measurement
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- diameter
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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
-
- 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 one kind to irradiate the underwater Diameter Measurement System of after-burning charge bar, including Spent Fuel Pool, the diameter measurement unit towards fuel assembly is provided with the Spent Fuel Pool, diameter measurement unit is connected with 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, the final conversion for realizing non electrical quantity and electricity, the underwater quick diameter measurement of fuel assembly periphery fuel rod can be realized in the Spent Fuel Pool very first time at the scene, the contact electric signal transmission conversion regime of use, measurement accuracy and detection efficiency can be greatly improved.
Description
Technical field
The invention belongs to the irradiation post fuel component pool frontier inspection of nuclear fuel cycle to look into field, and in particular to one kind irradiation after-burning
The underwater Diameter Measurement System of charge bar and its measuring method.
Background technology
Nuclear Plant power peak factor high in high burnup, the change of long circulating water chemistry, low leakage etc. is increasingly
Under harsh use condition, easily cause fuel assembly deformation and heap recycling can not be returned, by irradiation swelling occurs for fuel rod,
It is even damaged.Effective means of the pool side Examined effect as evaluations such as fuel assembly in-pile irradiation stability and integralities, undertakes
The vital task for ensureing nuclear plant safety operation.
Traditional fuel rod diameter measuring method typically uses the means such as slide measure, laser micrometer, Zaser contourgraph,
Subaqueous survey typically uses image method, laser optical method and ultrasonic method of measuring.Measured for underwater fuel rod, conventional method measurement
Precision and operating efficiency be not high.Therefore, it is necessary to establish a kind of new technology of the underwater diameter measurement of suitable fuel rod.
The content of the invention
Measurement accuracy and work be present when being the underwater diameter measurement of existing fuel rod in the technical problems to be solved by the invention
The problem of inefficient, there is provided the underwater Diameter Measurement System of one kind irradiation after-burning charge bar and its measuring method, pass through contact chip
Between small displacement change, change in displacement is converted into coil mutual inductance index variation, and then be converted into voltage, finally realized non-
The conversion of electricity and electricity, realize the accurate measurement of irradiation post fuel component periphery fuel rod diameter.
The present invention is achieved through the following technical solutions：
One kind irradiates the underwater Diameter Measurement System of after-burning charge bar, including Spent Fuel Pool, is set in the Spent Fuel Pool
There is the diameter measurement unit towards fuel assembly, diameter measurement unit is connected with signal acquiring and processing system.For fuel
During the underwater diameter measurement of rod, traditional measuring method typically using means such as slide measure, laser micrometer, Zaser contourgraphs,
Subaqueous survey typically uses image method, laser optical method and ultrasonic method of measuring.Measured for underwater fuel rod, conventional method measurement
Precision and operating efficiency be not high.Therefore, it is necessary to establish a kind of new technology of the underwater diameter measurement of suitable fuel rod.Fuel rod is underwater
Important component of the diameter measurement technology as pool side Examined effect, it is to utilize electromagnetic induction principle, by tested displacement
Change be converted into transformer coil mutual inductance change, then by measuring circuit be converted into voltage variable quantity export, realize by
Dimension measurement method of the non electrical quantity to electricity conversion.This programme uses scissor measuring probe contact chip, can preferably with combustion
The contact of charge bar surface will not cause fuel rod surface secondary damage again.Changed by the small displacement between contact chip, dexterously
Change in displacement is converted into coil mutual inductance index variation, and then is converted into voltage, finally realizes the conversion of non electrical quantity and electricity, it is real
The accurate measurement of post fuel component periphery fuel rod diameter is now irradiated, greatly improves measurement accuracy and detection efficiency.This is existing
The effect that technology has not reached, while also no technical staff expects this measuring method.
Diameter measurement unit includes underwater lens, measurement claw, sensor and drive mechanism, and the drive mechanism can
Moved horizontally towards fuel assembly periphery fuel rod, underwater lens are preferably two, observe 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 column is provided with Spent Fuel Pool, workbench is provided with column, 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
Connection, measuring probe is provided with measurement claw, and measuring probe is connected with sensor, with the traverse measurement of drive mechanism
Claw is inserted into fuel assembly periphery fuel rod so that displacement changes between two contact chips of measuring probe, measurement
Probe is arranged on measurement claw and is connected with sensor, is as the part with fuel rod wall contacts.Above-mentioned part is all
Existing part, commercially can directly it be commercially available, it is easy to operate after combination, can be at the scene in the Spent Fuel Pool very first time
Realize the underwater quick diameter measurement of fuel assembly periphery fuel rod, the contact electric signal transmission conversion regime of use can be with
Greatly improve measurement accuracy and detection efficiency.
Sensor is LVDT sensors.LVDT is linear variable difference transformer abbreviation, belongs to linear displacement transducer.It
It is made up of parts such as a primary coil, two secondary coils, iron core, coil rack, shells.It is unshakable in one's determination in the LVDT courses of work
Motion can not exceed coil the range of linearity, otherwise will produce non-linear value, therefore all LVDT have a linear model
Enclose.This programme uses LVDT sensors so that it can receive the micro-displacement between the contact chip of measuring probe in measurement claw
Amount changes, and the mutual inductance of transformer coil carries out corresponding change in sensor, so that measurement is more accurate.
One kind irradiation underwater diameter measuring method of after-burning charge bar, comprises the following steps：
（1）The angle of underwater lens is adjusted, underwater lens is observed fuel assembly periphery fuel rod and measurement respectively
Probe；
（2）The three-dimensional frame opening position that fuel assembly is hung to Diameter Measurement System in Spent Fuel Pool is fixed, and three-dimensional frame is
For fuel assembly and fuel rod to be fixed, equipment can only prevent it from rocking and causing from the one direction disengaging of three-dimensional frame
Measurement is inaccurate；
（3）Operation driving mechanisms control measurement claw travels forward, measurement claw insertion fuel assembly periphery fuel rod area
Domain, measurement claw and a wherein fuel rod wall contacts, continue to move to cause displacement between two contact chips of measuring probe
Change, the change of displacement causes the mutual inductance of LVDT sensor transformer coils to change；
（4）Coil mutual inductance index variation amount is transferred to by signal acquiring and processing system by cable and is converted into voltage
Variable quantity output, be pre-designed the specification containing multiple diameter processing contrast rod, using by verification spiral micrometer distinguish
The every kind of contrast rod position of contact measurement obtains scale value, and traverse measurement claw is caught in corresponding contrast rod（13）Obtain magnitude of voltage,
By scale value and the corresponding relation manufacturing system calibration curve of magnitude of voltage, further according to system calibrating curve, by actually measuring voltage
Value is back-calculated to obtain fuel rod diameter value.
In the technical program, using scissor measuring probe contact chip, preferably can be contacted with fuel rod surface and
Fuel rod surface secondary damage will not be caused.Changed by the small displacement between contact chip, dexterously convert change in displacement
For coil mutual inductance index variation, and then voltage is converted into, finally realizes the conversion of non electrical quantity and electricity, realize irradiation post fuel group
The accurate measurement of part periphery fuel rod diameter, greatly improves measurement accuracy and detection efficiency, and its is easy to operate, can be at the scene
The underwater quick diameter measurement of fuel assembly periphery fuel rod, the contact telecommunications of use are realized in the Spent Fuel Pool very first time
Number transmission conversion regime, measurement accuracy and detection efficiency can be greatly improved.Electric signal transmission conversion this as existing technology,
But do not apply it in this area and be used for irradiating the underwater diameter measurement of after-burning charge bar, this programme applies it to core combustion
The irradiation post fuel component pool frontier inspection of material circulation looks into field, for being measured to the irradiation underwater diameter of after-burning charge bar, achieves
The effect that existing measuring method is not reached, and the simplicity for measuring operation greatly improves, and the efficiency of measurement also further carries
It is high.
The present invention compared with prior art, has the following advantages and advantages：The present invention is easy to operate, can be at the scene
The underwater quick diameter measurement of fuel assembly periphery fuel rod, the contact telecommunications of use are realized in the Spent Fuel Pool very first time
Number transmission conversion regime, measurement accuracy and detection efficiency can be greatly improved.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form 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.
Mark and corresponding parts title in accompanying drawing：
1- fuel rods, 2- measuring probes, 3-LVDT sensors, 4- three-dimensional frames, 5- underwater lens, 6- drive mechanisms, 7- are stood
Post, 8- cables, 9- signal acquiring and processing systems, 10- halls row are hung, 11- Spent Fuel Pools, 12- measurement claws, 13- pairs
Compare rod.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation 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 underwater Diameter Measurement System of after-burning charge bar, by being installed in Spent Fuel Pool 11
Main stand column 7, underwater diameter measurement unit is attached on column 7, diameter measurement unit includes underwater lens 5, measurement card
Pawl 12, LVDT sensors 3 and drive mechanism 6, drive mechanism 6 can carry out horizontal shifting towards fuel assembly periphery fuel rod 1
Dynamic, underwater lens 5, measurement claw 12, LVDT sensors 3 are arranged in drive mechanism 6, LVDT sensors 3 and signal acquisition
It is connected with processing system 9, measuring probe 2 is provided with measurement claw 12, and measuring probe 2 is connected with LVDT sensors 3, is adjusted
The angle of whole underwater lens 5, two underwater lens 5 are enable to observe fuel assembly periphery fuel rod 1 and measuring probe 2 respectively；
Workbench is installed, drive mechanism 6 is arranged on workbench on column 7.10 are hung using hall row to be hung to fuel assembly
The opening position of three-dimensional frame 4 of Diameter Measurement System is fixed in Spent Fuel Pool 11；Operate the control measurement of drive mechanism 6 claw 12 forward
Motion, measurement claw 12 insert the region of fuel assembly periphery fuel rod 1, and measurement claw 12 connects with a wherein outer wall of fuel rod 1
Touch, continue to move to so that displacement changes between two contact chips of measuring probe 2, the change of displacement causes LVDT to sense
The mutual inductance change of the transformer coil of device 3；Coil mutual inductance index variation amount is transferred to by signal acquisition and place by cable 8
Reason system 9 and the variable quantity output for being converted into voltage, signal acquisition is transferred to by cable 8 by coil mutual inductance index variation amount
With processing system 9 and the variable quantity output of voltage is converted into, is pre-designed the processing contrast rod 13 of the specification containing multiple diameter, processing
The quantity of contrast rod 13 is at least four kinds, so just can guarantee that processing contrast rod 13 has accurate reference value, using by school
The spiral micrometer tested obtains scale value in every kind of contrast rod 13 position of contact measurement respectively, and traverse measurement claw 12 is caught in corresponding
Contrast rod 13 obtains magnitude of voltage, by scale value and the corresponding relation manufacturing system calibration curve of magnitude of voltage, further according to system calibrating
Curve, the diameter value of fuel rod 1 is back-calculated to obtain by actually measuring magnitude of voltage.This method by driving mechanisms control measuring probe forward
Motion, insertion fuel assembly periphery fuel rod so that the displacement between two contact chips of measuring probe changes, displacement
Change causes the mutual inductance of LVDT sensor transformer coils to change, and is transmitted coil mutual inductance index variation amount by cable
To signal acquiring and processing system and the variable quantity output of voltage is converted into, is further according between magnitude of voltage and actual measured value
System calibration curve relation obtains fuel rod diameter value.The present invention is easy to operate, can be real in the Spent Fuel Pool very first time at the scene
The underwater quick diameter measurement of existing fuel assembly periphery fuel rod, the contact electric signal transmission conversion regime of use, Ke Yi great
Width improves measurement accuracy and detection efficiency.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (3)
1. one kind irradiation underwater diameter measuring method of after-burning charge bar, it is characterised in that comprise the following steps：
（1）In Spent Fuel Pool（11）In be provided with diameter measurement unit towards fuel assembly, diameter measurement unit is connected with
Signal acquiring and processing system（9）；Diameter measurement unit includes underwater lens（5）, measurement claw（12）, LVDT sensors（3）
And drive mechanism（6）, the drive mechanism（6）Can be towards fuel assembly periphery fuel rod（1）Moved horizontally, under water
Camera lens（5）, measurement claw（12）, sensor be arranged at drive mechanism（6）On, LVDT sensors（3）With signal acquisition and place
Reason system（9）Connection, in measurement claw（12）On be provided with measuring probe（2）, and measuring probe（2）With LVDT sensors（3）
Connection, with drive mechanism（6）Traverse measurement claw（12）It is inserted into fuel assembly periphery fuel rod（1）So that measurement
Probe（2）Two contact chips between displacement change, adjust underwater lens（5）Angle, make underwater lens（5）Can be respectively
It was observed that fuel assembly periphery fuel rod（1）And measuring probe（2）；
（2）Fuel assembly is hung to Spent Fuel Pool（11）The three-dimensional frame of middle Diameter Measurement System（4）Opening position is fixed；
（3）Operate drive mechanism（6）Control measurement claw（12）Travel forward, measure claw（12）Insert the combustion of fuel assembly periphery
Charge bar（1）Region, measure claw（12）With a wherein fuel rod（1）Wall contacts, continue to move to so that measuring probe（2）'s
Displacement changes between two contact chips, and the change of displacement causes LVDT sensors（3）The mutual inductance of transformer coil
Change；
（4）Pass through cable（8）Coil mutual inductance index variation amount is transferred to signal acquiring and processing system（9）And it is converted into electricity
The variable quantity output of pressure, it is pre-designed the processing contrast rod of the specification containing multiple diameter（13）, using the spiral micrometer by verification
Instrument distinguishes the every kind of contrast rod of contact measurement（13）Position obtains scale value, traverse measurement claw（12）Contrast rod corresponding to being caught in
（13）Magnitude of voltage is obtained, by scale value and the corresponding relation manufacturing system calibration curve of magnitude of voltage, further according to system calibrating curve,
Fuel rod is back-calculated to obtain by actually measuring magnitude of voltage（1）Diameter value.
A kind of 2. irradiation underwater diameter measuring method of after-burning charge bar according to claim 1, it is characterised in that the weary combustion
Expect pond（11）In column is installed（7）, column（7）On workbench, drive mechanism are installed（6）It is arranged on workbench
On.
3. a kind of irradiation underwater diameter measuring method of after-burning charge bar according to claim 1, it is characterised in that described underwater
Camera lens（5）Quantity be two.
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 CN106229019A (en) | 2016-12-14 |
| CN106229019B true 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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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110853778B (en) * | 2019-11-18 | 2021-09-28 | 中国核动力研究设计院 | Irradiation device for realizing real-time measurement of axial length change of fuel element |
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| US4243939A (en) * | 1978-08-07 | 1981-01-06 | General Electric Company | Determining paramagnetic additive content of a base paramagnetic material containing ferromagnetic impurity |
| JPH0381695A (en) * | 1989-08-24 | 1991-04-08 | Japan Atom Energy Res Inst | Method and device for nuclear fuel breakage detection |
| JP2008281525A (en) * | 2007-05-14 | 2008-11-20 | Toshiba Corp | Monitor system |
| CN102867553A (en) * | 2011-07-08 | 2013-01-09 | 韩电原子力燃料株式会社 | Apparatus for measuring outer diameters of fuel rods of nuclear fuel assembly |
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| CN106229019A (en) | 2016-12-14 |
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