CN106098124B - A kind of fuel assembly altitude measurement system and its measuring method under water - Google Patents
A kind of fuel assembly altitude measurement system and its measuring method under water Download PDFInfo
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- CN106098124B CN106098124B CN201610520188.1A CN201610520188A CN106098124B CN 106098124 B CN106098124 B CN 106098124B CN 201610520188 A CN201610520188 A CN 201610520188A CN 106098124 B CN106098124 B CN 106098124B
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- fuel assembly
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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
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- 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
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- 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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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a kind of fuel assembly altitude measurement system and its measuring method under water, including Spent Fuel Pool, workbench is provided with the Spent Fuel Pool, main stand is provided with workbench, the workbench can carry out vertical along the outer wall of main stand and move, apparatus for making a video recording is installed on workbench, signal acquiring and processing system is provided with above Spent Fuel Pool, position coder is provided between signal acquiring and processing system and apparatus for making a video recording, and position coder is connected with signal acquiring and processing system and apparatus for making a video recording simultaneously；The vertical scale parallel with fuel assembly is provided with the Spent Fuel Pool.The present invention is easy to operate, the quick measurement of fuel assembly height under water can be realized in the Spent Fuel Pool very first time at the scene, by electric signal transmission, simultaneously digital display, to signal acquiring and processing system, can increase substantially measurement accuracy and efficiency for the position coder conversion used.
Description
Technical field
Field is looked into the invention belongs to the irradiation post fuel component pool frontier inspection of nuclear fuel cycle, and in particular to a kind of fuel assembly
Altitude measurement system and its measuring method under water.
Background technology
Fuel assembly is operated in high temperature, high pressure, high radiation cycle water, due to assembling the shadow of the factor such as heating power and thermal stress
Ring, easily cause fuel assembly height change and profile changes and can not return heap recycling.Pool side Examined effect is used as fuel stack
The effective means of the evaluation such as part in-pile irradiation stability and integrality, carries the vital task for ensureing nuclear plant safety operation.
Fuel assembly under water elevation carrection be pool side Examined effect important component.At present, laser triangulation and
Supersonic sounding is all conventional fuel assembly shape dimension measurement method, but is only applied to the profile wheel of fuel assembly vertical plane
Exterior feature measurement, and fuel assembly elevation carrection under water can not be realized；Elevation carrection typically uses image method to fuel assembly under water, i.e.,
Using the image in camera record fuel assembly short transverse, the pixel value on image is carved according to the scale of camera record
Angle value is demarcated, so that the height of fuel assembly is obtained by the pixel value of the upper and lower end face of fuel assembly, this measuring method
Measurement accuracy is relatively low, it is difficult to ensure the accuracy and authenticity of fuel assembly height measured data.To solve this problem, it is necessary to
The method for setting up a kind of suitable fuel assembly elevation carrection under water.
The content of the invention
The technical problems to be solved by the invention be it is existing for fuel assembly under water elevation carrection when there is measurement accuracy
It is relatively low, it is difficult to ensure the accuracy and authenticity of fuel assembly height measured data, it is therefore intended that a kind of fuel assembly water is provided
Lower altitude measurement system and its measuring method, the system and its measuring method can accurately measure fuel assembly height under water,
And increase substantially measurement accuracy and efficiency.
The present invention is achieved through the following technical solutions：
Work is provided with a kind of fuel assembly altitude measurement system, including Spent Fuel Pool under water, the Spent Fuel Pool
Make to be provided with main stand on platform, workbench, the workbench can carry out vertical shifting along the outer wall of main stand
It is dynamic, apparatus for making a video recording is installed on workbench, signal acquiring and processing system, signal acquisition are provided with above Spent Fuel Pool
Position coder is provided between processing system and apparatus for making a video recording, and position coder is while and signal acquiring and processing system
With apparatus for making a video recording connection；It is provided with the vertical scale parallel with fuel assembly in the Spent Fuel Pool, and apparatus for making a video recording
The central axis of center line and vertical scale.Conventional laser range of triangle and supersonic sounding are all conventional fuel assembly profiles
Dimension measurement method, but the appearance profile measurement of fuel assembly vertical plane is only applied to, and fuel assembly water can not be realized
Lower elevation carrection；Elevation carrection typically uses image method to fuel assembly under water, i.e., using camera record fuel assembly height side
Upward image, is demarcated to the pixel value on image according to the scale label value of camera record, so that by fuel assembly
The pixel value of upper and lower end face obtains the height of fuel assembly, and the measurement accuracy of this measuring method is relatively low, it is difficult to ensure fuel stack
The accuracy and authenticity of part height measured data.To solve this problem, it is necessary to which to set up a kind of suitable fuel assembly high under water
Spend the method for measurement.And the technical program then can effectively solve the problem that above mentioned problem, using vertical scale to occurring on vertical direction
The position coder connected on the workbench of change in displacement is demarcated, and determines that encoder values are corresponding with scale high scale value
Relation, then elevation carrection is carried out to fuel assembly by the workbench, changed by the encoder values of each endface position of fuel assembly
For size value on scale, that is, obtain the height of fuel assembly.Its is easy to operate, can be real in the Spent Fuel Pool very first time at the scene
The quick measurement of existing fuel assembly height under water, the position coder conversion used is by electric signal transmission and digital display to signal acquisition
With processing system, measurement accuracy and efficiency can be increased substantially.
Apparatus for making a video recording is preferably radioresistance camera, improves its service life and measurement accuracy, will not due to equipment by
To radiation interference so that fogging image and cause measurement result to be affected.And radioresistance camera is moved in main stand
Distance range is more than the height of fuel assembly.Whole fuel assembly can so be imaged by radioresistance camera completely so that
Be not in dead angle and deviation, finally give accurate height measurements.
A kind of fuel assembly height measurement method under water, comprises the following steps：
（1）Adjustment work platform make it that it is moved on main stand, makes the cross searching mark of radioresistance camera lens just to vertical
A certain integer scale value position and focused on scale, it is zero point to set the correspondence encoder values；
（2）Continue adjustment work podium level, the change of displacement causes the change in electric of position coder, passes through electricity
Change in electric amount is transferred to signal acquiring and processing system and is converted into numerical monitor by cable, the change in displacement occurred every time
When correspondence scale often changes 100mm scale values, an encoder values are recorded, the change in displacement total amount of record is more than fuel assembly
Design height, the encoder values of record are contacted successively and obtain the corresponding relation curve of encoder values and vertical scale scale value；
（3）Vertical scale is returned to Spent Fuel Pool edge, fuel assembly is hoisted to the position that vertical scale is put down,
It is placed in having set up in the meter full scale of corresponding relation curve so that radioresistance camera lens shooting lateral separation is consistent, adjustment work
Podium level, make the cross searching mark of radioresistance camera lens respectively just on the upper base of fuel assembly along in, lower edge and bottom nozzle
Along, it is lower along position；
（4）The corresponding encoder values in each position are recorded, pass through encoder values and the vertical scale scale value pair obtained
Relation curve is answered, that is, obtains the height of fuel assembly.
In the technical program, it is by using vertical scale to being subjected to displacement on vertical direction on the workbench of change
The position coder of connection is demarcated, and determines the corresponding relation of encoder values and scale high scale value, then by the workbench
Elevation carrection is carried out to fuel assembly, size value on scale is converted to by the encoder values of each endface position of fuel assembly, produces
To the height of fuel assembly.Change in electric amount is wherein transferred to signal acquiring and processing system and numerical monitor is converted into
Process, this is prior art, is a kind of mode of signal conversion, and conversion is rapid and accurate, for fuel assembly height under water
During measurement, its efficiency is greatly improved.
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 quick measurement of fuel assembly height under water is realized in the Spent Fuel Pool very first time, the position coder used is changed by telecommunications
Number transmission and digital display to signal acquiring and processing system, measurement accuracy and efficiency can be increased substantially.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding 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 measuring principle figure of the present invention.
Mark and corresponding parts title in accompanying drawing：
1- fuel assemblies, 2- vertical scales, the main stands of 3-, 4- workbenches, 5- radioresistance camera lenses, 6- position coders,
7- cables, 8- signal acquiring and processing systems, 9- cranes, 10- Spent Fuel Pools.
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 and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment：
As shown in figure 1, a kind of fuel assembly altitude measurement system, including Spent Fuel Pool 10 under water, in Spent Fuel Pool
10 install main stand 3, and the bottom of main stand 3 is vertically fixed on the bottom of Spent Fuel Pool 10, and radioresistance camera lens 5 is attached into work
Make on platform 4, workbench 4 is connected with position coder 6, and can be vertically movable on main stand 3, the workbench 4
Vertical can be carried out along the outer wall of main stand 3 to move, radioresistance camera 5 is installed, in spentnuclear fuel on workbench 4
The top of pond 10 is provided with signal acquiring and processing system 8, is set between signal acquiring and processing system 8 and radioresistance camera 5
Position coder 6 is equipped with, and position coder 6 is connected with signal acquiring and processing system 8 and radioresistance camera 5 simultaneously；Institute
State and the vertical scale 2 parallel with fuel assembly 1 be provided with Spent Fuel Pool 10, and the center line of radioresistance camera 5 and
The central axis of vertical scale 2, radioresistance camera 5 is more than the height of fuel assembly 1 in the distance range that main stand 3 is moved
Degree, vertical scale 2 is released from the edge of Spent Fuel Pool 10, to the visual field of radioresistance camera lens 5, the lower section of vertical scale 2 connection lead
Hang down, into free plumbness.Its specific measurement process is as follows：
（1）Adjustment work platform 4 make it that it is moved on main stand 3, makes the cross searching mark of radioresistance camera lens 5 just to perpendicular
A certain integer scale value position and focused on straight scale 2, the correspondence encoder values are set for zero point；
（2）Continue the height of adjustment work platform 4, the change of displacement causes the change in electric of position coder 6, passed through
Change in electric amount is transferred to signal acquiring and processing system 8 and is converted into numerical monitor by cable 7, the displacement occurred every time
When change correspondence scale often changes 100mm scale values, record one encoder values, the i.e. height of workbench 4 is relative to vertical mark
When chi 2 moves 100mm, that is, the numerical value of now encoded radio is recorded, and the change in displacement total amount recorded is more than setting for fuel assembly
Meter height, obtains the corresponding relation curve of encoder values and vertical scale scale value after the encoder values of record are contacted successively；
（3）Vertical scale 2 is returned to the edge of Spent Fuel Pool 10, fuel assembly 1 is hoisted to vertical mark using crane 9
The position that chi 2 is put down, i.e. fuel assembly 1 are overlapped with the position of vertical scale 2, are placed in having set up the scale model of corresponding relation curve
In enclosing, lateral separation is consistent when such radioresistance camera lens 5 is imaged, the height of adjustment work platform 4, makes radioresistance camera lens 5
Cross searching mark respectively just on the upper base of fuel assembly 1 along in, lower edge and bottom nozzle along, it is lower along position；
（4）The corresponding encoder values in each position are recorded, pass through the encoder values with having obtained and vertical scale scale value
Corresponding relation curve is contrasted, and according to position of each encoder values in curve, the vertical scale height value that it is obtained is i.e.
Obtain the height of fuel assembly.
This programme mainly uses vertical scale to being subjected to displacement the position connected on the workbench of change on vertical direction
Put encoder to be demarcated, determine the corresponding relation of encoder values and scale high scale value, then by the workbench to fuel stack
Part carries out elevation carrection, is converted to size value on scale by the encoder values of each endface position of fuel assembly, that is, obtains fuel stack
The height of part.By this method so that measurement process is easy to operate, the Spent Fuel Pool very first time interior realize it can fire at the scene
Expect the quick measurement of component height under water, the position coder conversion used by electric signal transmission and digital display to signal acquisition with
Reason system, for conventionally employed pixel value obtains height, can increase substantially measurement accuracy and efficiency.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
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 modifications, equivalent substitutions and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (1)
1. a kind of fuel assembly height measurement method under water, it is characterised in that comprise the following steps：
(1) include being provided with workbench (4), workbench (4) in Spent Fuel Pool (10), the Spent Fuel Pool (10)
Main stand (3) is provided with, the workbench (4) can carry out vertical movement along the outer wall of main stand (3), and work is flat
Platform is provided with apparatus for making a video recording on (4), is provided with signal acquiring and processing system (8) above Spent Fuel Pool (10), signal is adopted
Collection and processing system (8) are provided with position coder (6) between apparatus for making a video recording, and position coder (6) with signal while adopt
Collection is connected with processing system (8) and apparatus for making a video recording；Parallel with fuel assembly (1) erect is provided with the Spent Fuel Pool (10)
Straight scale (2), and the central axis of the center line and vertical scale (2) of apparatus for making a video recording, apparatus for making a video recording image for radioresistance
Head (5), adjustment work platform (4) is such that it is moved on main stand (3), and apparatus for making a video recording is in main stand (3) movement apart from model
The height more than fuel assembly (1) is enclosed, makes the cross searching mark of radioresistance camera lens (5) just to a certain integer on vertical scale (2)
Scale value position is simultaneously focused on, and it is zero point to set the correspondence encoder values；
(2) adjustment work platform (4) height is continued, the change of displacement causes the change in electric of position coder (6), passed through
Change in electric amount is transferred to signal acquiring and processing system (8) and is converted into numerical monitor by cable (7), is occurred every time
When change in displacement correspondence scale often changes 100mm scale values, an encoder values are recorded, the change in displacement total amount of record is more than combustion
Expect the design height of component, the encoder values of record are contacted successively and obtain encoder values pass corresponding with vertical scale scale value
It is curve；
(3) vertical scale (2) is returned to Spent Fuel Pool (10) edge, fuel assembly (1) is hoisted to vertical scale (2) position
Put, be placed in having set up in the meter full scale of corresponding relation curve, adjustment work platform (4) height makes radioresistance camera lens (5)
Cross searching mark respectively just on the upper base of fuel assembly (1) along in, lower edge and bottom nozzle along, it is lower along position；
(4) the corresponding encoder values in each position are recorded, are closed by the way that the encoder values obtained are corresponding with vertical scale scale value
It is curve, that is, obtains the height of fuel assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610520188.1A CN106098124B (en) | 2016-07-05 | 2016-07-05 | A kind of fuel assembly altitude measurement system and its measuring method under water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610520188.1A CN106098124B (en) | 2016-07-05 | 2016-07-05 | A kind of fuel assembly altitude measurement system and its measuring method under water |
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| CN106098124A CN106098124A (en) | 2016-11-09 |
| CN106098124B true CN106098124B (en) | 2017-07-11 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106448765B (en) * | 2016-11-25 | 2017-12-15 | 中国核动力研究设计院 | Detection means suitable for spent nuclear fuel in nuclear power plant component overall performance inspection |
| CN106803433B (en) * | 2017-02-27 | 2018-04-27 | 中国核动力研究设计院 | One kind irradiation underwater bending morpheme measuring method of post fuel component |
| CN107167052B (en) * | 2017-05-26 | 2019-04-09 | 中国核动力研究设计院 | A kind of underwater high radioactivity intensive tube bundle length-measuring appliance and its measurement method |
| CN107221364B (en) * | 2017-05-31 | 2019-07-05 | 岭澳核电有限公司 | Nuclear fuel assembly underwater test platform and test method |
| 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 |
| US11031144B2 (en) * | 2017-12-26 | 2021-06-08 | Westinghouse Electric Company Llc | Method and apparatus for inspecting a fuel assembly |
| CN113063358B (en) * | 2021-03-23 | 2022-07-29 | 中国核动力研究设计院 | System and method for measuring length of irradiated fuel assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05225258A (en) * | 1992-02-10 | 1993-09-03 | Nuclear Fuel Ind Ltd | Data processing method for visual inspection of fuel assembly |
| JP3051609B2 (en) * | 1993-09-01 | 2000-06-12 | 三菱重工業株式会社 | Appearance inspection system for fuel assemblies |
| CN104517659B (en) * | 2014-12-29 | 2017-01-18 | 中国核动力研究设计院 | Underwater radiation-resistant laser measuring equipment |
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