CN106935291A - A kind of fuel assembly deflection bilayer measuring system and measuring method - Google Patents
A kind of fuel assembly deflection bilayer measuring system and measuring method Download PDFInfo
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- CN106935291A CN106935291A CN201511017832.5A CN201511017832A CN106935291A CN 106935291 A CN106935291 A CN 106935291A CN 201511017832 A CN201511017832 A CN 201511017832A CN 106935291 A CN106935291 A CN 106935291A
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- screen work
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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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- 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)
Abstract
The invention belongs to fuel assembly field of measuring technique, a kind of fuel assembly deflection bilayer measuring system and measuring method are specifically disclosed, the system includes measuring system matrix, ground floor detecting system and second layer detecting system, upper and lower toroidal cavity is provided with measuring system matrix, second layer detecting system is provided with upper toroidal cavity, ground floor detecting system is provided with lower toroidal cavity；The method includes：Refueling machine crawl fuel assembly moves to Spent Fuel Pool screen work top；Refueling machine inserts in Spent Fuel Pool screen work fuel assembly；Second layer detecting system, ground floor detecting system two-layer screen work adjacent to fuel assembly successively detects, obtains fuel assembly deflection of every layer assembly screen work relative to ground floor screen work；From above-mentioned fuel assembly deflection, the deflection that maximum is fuel assembly is chosen.The measuring system and measuring method can eliminate the error introduced due to fuel assembly transverse shakiness, improve the certainty of measurement of fuel assembly deflection.
Description
Technical field
The invention belongs to fuel assembly field of measuring technique, and in particular to a kind of fuel assembly deflection is double-deck to be surveyed
Amount system and measuring method.
Background technology
In shutdown discharging or charging process, the fuel assembly to part postdose carries out deformation detection to nuclear power station.
Fuel assembly deflection is calculated by the relative space position of fuel assembly screen work, testing equipment
It is circular platform structure, wherein circumferentially arranging 6 groups of laser measuring device for measuring.During detection, inspection equipment is put
In on fuel pit screen work；A group fuel assembly is captured using refueling machine, fall from circular hole in the middle of circular platform
Above carry, 6 groups of laser of period are projected to 6 faces of fuel assembly respectively, received by light path and processed,
Realize that fuel assembly deformation is measured.
During fuel assembly deformation detection, during refueling machine lifting and underthrust fuel assembly, due to fuel stack
Part introduces detection error in the presence of rocking using laser measuring technique.
The content of the invention
It is an object of the invention to provide a kind of fuel assembly deflection bilayer measuring system and measuring method, should
Measuring system and measuring method can eliminate the error introduced due to fuel assembly transverse shakiness, improve fuel
The certainty of measurement of component strain amount.
Realize the technical scheme of the object of the invention：A kind of fuel assembly deflection bilayer measuring system, the system
Including measuring system matrix, ground floor detecting system and second layer detecting system, it is provided with measuring system matrix
Upper toroidal cavity and lower toroidal cavity, are provided with second layer detecting system, in lower toroidal cavity in upper toroidal cavity
It is provided with ground floor detecting system.
Described measuring system matrix integrally be in hollow hexahedron, upper toroidal cavity, lower toroidal cavity with survey
Measure the centre bore connection of system-forming matrix.
Described second layer detecting system is by six second layer transmitter units in upper toroidal cavity and six
Second layer receiving unit is constituted；Ground floor detecting system is launched by six ground floors in lower toroidal cavity
Unit and six ground floor receiving unit compositions.
1 described second layer transmitter unit and second layer receiving unit are one group, and every group of second layer transmitting is single
Unit, second layer receiving unit are arranged in a side of hexagon measuring system matrix；1 ground floor transmitter unit
It it is one group with ground floor receiving unit, every group of ground floor transmitter unit, ground floor receiving unit are arranged in six sides
One side of shape measuring system matrix；Each ground floor transmitter unit top one second layer transmitter unit of arrangement,
Each ground floor receiving unit top one second layer receiving unit of arrangement.
Described receiving unit, transmitter unit respectively uses laser emission element, laser receiving unit.
A kind of fuel assembly deflection bilayer measuring method, the method specifically includes following steps：
Step 1：Refueling machine crawl fuel assembly moves to the Spent Fuel Pool screen work for fuel assembly detection
Side；
Step 2：Refueling machine inserts in Spent Fuel Pool screen work fuel assembly；Down process, second layer detection
System, ground floor detecting system two-layer screen work adjacent to fuel assembly successively detect, obtain every layer and fire
Fuel assembly deflection of the material component screen work relative to fuel assembly ground floor screen work；
Step 3：The every layer of fuel assembly screen work obtained from above-mentioned steps 2 is relative to fuel assembly ground floor screen work
Fuel assembly deflection in, choose maximum and be the deflection S of fuel assembly.
Described step 2 is specific as follows：
Step 2.1：Ground floor detecting system correspondence position, fuel assembly are inserted under fuel assembly ground floor screen work
Second layer detecting system correspondence position is inserted under second layer screen work；Ground floor detecting system measures fuel assembly
Ground floor screen work position X1-1, second layer detecting system measures second layer screen work position X2-2；Obtain fuel stack
Fuel assembly deflection S of the part second layer screen work relative to fuel assembly ground floor screen work 20212=| X2-2-
X1-1|；
Step 2.2：When being inserted into ground floor detecting system correspondence position, fuel stack under fuel assembly second layer screen work
Second layer detecting system correspondence position is inserted under part third layer screen work；Ground floor detecting system measures second layer lattice
Rack position X1-2, second layer detecting system measures third layer screen work position X2-3；Obtain fuel assembly third layer
Fuel assembly deflection S of the screen work relative to fuel assembly ground floor screen work13=| (X2-3-X1-2)+(X2-2-
X1-1)|
Step 2.3：When being inserted into ground floor detecting system correspondence position, fuel stack under fuel assembly third layer screen work
Second layer detecting system correspondence position is inserted under the 4th layer of screen work of part；Ground floor detecting system measures third layer
Screen work position X1-3, second layer detecting system measures the 4th layer of screen work position X2-4；Obtain fuel assembly the 4th
Fuel assembly deflection S of the layer screen work 205 relative to fuel assembly ground floor screen work 20214=| (X2-4-X1-3)
+(X2-3-X1-2)+(X2-2-X1-1)|
……
Step 2.n：When being inserted into ground floor detecting system correspondence position, fuel stack under fuel assembly n-th layer screen work
Second layer detecting system correspondence position is inserted under part n-1 layers of screen work；Ground floor detecting system measures fuel assembly
N-1 layers of screen work position X1-n, second layer detecting system measures fuel assembly n-th layer screen work position X2-(n+1)；
Obtain fuel assembly deflection S of the fuel assembly n-th layer screen work relative to fuel assembly ground floor screen work1n=|
(X2-4-X1-3)+(X2-3-X1-2)+(X2-2-X1-1)+……+(X2-(n+1)-X1-n)|。
Described step 3 is specific as follows：Deflection S=MAX (the S of fuel assembly12, S13, S14... ...,
S1n), i.e. the deflection S of fuel assembly is every group fuel assembly deflection S12, S13, S14... ..., S1n
In maximum.
Advantageous Effects of the invention：The present invention is fired using double-deck detection method using relative position measurement
Material component strain amount, successfully eliminates the detection error introduced because fuel assembly is rocked in detection process,
Fuel assembly deformation detection precision is improve, irradiation post fuel component strain accuracy of detection difference problem is solved.
Brief description of the drawings
Fig. 1 is a kind of instrumentation plan of fuel assembly deflection bilayer measuring system provided by the present invention；
Fig. 2 is a kind of structural representation of fuel assembly deflection bilayer measuring system provided by the present invention；
Fig. 3 is a kind of structural representation of fuel assembly system of the prior art.
In figure：1. Spent Fuel Pool pool wall；
2. fuel assembly, 201. fuel assembly bottom nozzles, 202. the first grid spacers of fuel assembly, 203. fuel
The grid spacer of component second, the grid spacer of 204. fuel assembly the 3rd, the grid spacer of 205. fuel assembly the 4th,
The grid spacer of 206. fuel assembly the 5th, the grid spacer of 207. fuel assembly the 6th, 208. fuel assemblies the 7th are determined
Position screen work, the grid spacer of 209. fuel assembly the 8th, the grid spacer of 210. fuel assembly the 9th, 211. fuel stacks
Part cluster, 212. upper pipe seat of fuel component；
3. Spent Fuel Pool screen work；
4. fuel assembly deflection bilayer measuring system, 401. ground floor receiving units, 402. second layers receive single
Unit, 403. measuring system matrixes, 404. second layer transmitter units, 405. ground floor transmitter units；
5. Spent Fuel Pool medium.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1 and Figure 2, a kind of fuel assembly deflection bilayer measuring system 4 provided by the present invention,
The system includes measuring system matrix 403, ground floor receiving unit 401, second layer receiving unit 402, survey
Amount system-forming matrix 403, second layer transmitter unit 404 and ground floor transmitter unit 405, measuring system matrix 403
Overall is in hollow hexahedron, and upper and lower two toroidal cavities are provided with measuring system matrix 403, that is, go up annular
Cavity A and lower toroidal cavity B, upper toroidal cavity A, lower toroidal cavity B with measuring system matrix 403
Centre bore C connection.Arrangement six second layer transmitter units 404 and six second layers in upper toroidal cavity A
Receiving unit 402, every 1 second layer transmitter unit 404 and 1 second layer receiving unit 402 are one group,
Every group of second layer transmitter unit 404, second layer receiving unit 402 are arranged in hexagon measuring system matrix 403
A side.Six ground floor transmitter units 405 of arrangement and six ground floors receive single in lower toroidal cavity B
Unit 401, every 1 ground floor transmitter unit 405 and 1 ground floor receiving unit 401 are one group, every group the
One layer of transmitter unit 405, ground floor receiving unit 401 are arranged in of hexagon measuring system matrix 403
Side.Each top of ground floor transmitter unit 405 one second layer transmitter unit 404 of arrangement, each ground floor connects
Receive the top of unit 401 one second layer receiving unit 402 of arrangement.
Six second layer transmitter units 404 and six 402 groups of second layer receiving units in upper toroidal cavity A
Into second layer detecting system.Six ground floor transmitter units 405 and six ground floors in lower toroidal cavity B
Receiving unit 401 constitutes ground floor detecting system.
Transmitter unit and receiving unit in ground floor detecting system and second layer detecting system are sent out using laser
Penetrate unit and laser receiving unit.Ground floor detecting system is with the spacing of the laser of second layer detecting system
340mm, the spacing is identical with adjacent two layers fuel assembly screen work spacing, can simultaneously detect fuel assembly phase
The locus of adjacent two-layer grid spacer.Ground floor detecting system uses Laser Measuring with second layer detecting system
Away from technology, the locus of spacer grid of fuel assembly is obtained, calculate the deflection of fuel assembly.
As shown in figure 3, fuel assembly to be detected 2 is hexagon, n-layer screen work is had, from bottom to up fuel
Component screen work is numbered：Fuel assembly ground floor screen work, fuel assembly second layer screen work, fuel assembly the 3rd
Layer screen work ... ..., fuel assembly n-th layer screen work.Fuel assembly screen work spacing 340mm.
For example, uniform between the fuel assembly bottom nozzle 201 and upper pipe seat of fuel component 212 of fuel assembly 2
10 layers of screen work, from bottom to up fuel assembly screen work numbering be：Fuel assembly ground floor screen work 202, fuel stack
Part second layer screen work 203, fuel assembly third layer screen work 204, fuel assembly the 4th layer of screen work 205, fuel
Component layer 5 screen work 206, fuel assembly layer 6 screen work 207, fuel assembly layer 7 screen work 208, combustion
Material the 8th layer of screen work 209 of component, the 9th layer of screen work 210 of fuel assembly, the tenth layer of screen work 211 of fuel assembly,.
Adjacent two layers fuel assembly screen work spacing 340mm.
As shown in figure 3, a kind of fuel assembly deflection bilayer measuring method provided by the present invention, the method
Specifically include following steps：
Step 1：Refueling machine crawl fuel assembly 2 moves to the Spent Fuel Pool screen work for fuel assembly detection
3 tops；
Step 2：Refueling machine inserts in Spent Fuel Pool screen work 3 fuel assembly 2；Down process, the second layer
Detecting system, ground floor detecting system two-layer screen work adjacent to fuel assembly 2 successively are detected, obtained
Every layer of fuel assembly screen work relative to fuel assembly ground floor screen work 202 fuel assembly deflection, the step
It is specific as follows：
Step 2.1：Ground floor detecting system correspondence position, fuel are inserted under fuel assembly ground floor screen work 202
Second layer detecting system correspondence position is inserted under component second layer screen work 203；Ground floor detecting system is measured
The position X of fuel assembly ground floor screen work 2021-1, second layer detecting system measures the position of second layer screen work 203
X2-2；
Calculate and obtain fuel of the fuel assembly second layer screen work 203 relative to fuel assembly ground floor screen work 202
Component strain amount S12。
S12=| X2-2-X1-1|
Step 2.2：When ground floor detecting system correspondence position is inserted under fuel assembly second layer screen work 203, fire
Second layer detecting system correspondence position is inserted under material component third layer screen work 204；Ground floor detecting system is measured
The position X of second layer screen work 2031-2, second layer detecting system measures the position X of third layer screen work 2042-3；
Calculate and obtain fuel of the fuel assembly third layer screen work 203 relative to fuel assembly ground floor screen work 202
Component strain amount S13。
S13=| (X2-3-X1-2)+(X2-2-X1-1)|
Step 2.3：When ground floor detecting system correspondence position is inserted under fuel assembly third layer screen work 204, fire
Second layer detecting system correspondence position is inserted under material the 4th layer of screen work 205 of component；Ground floor detecting system is measured
Go out the position X of third layer screen work 2041-3, second layer detecting system measures the 4th layer of position X of screen work 2052-4；
Calculate and obtain fuel of the 4th layer of screen work 205 of fuel assembly relative to fuel assembly ground floor screen work 202
Component strain amount S14。
S14=| (X2-4-X1-3)+(X2-3-X1-2)+(X2-2-X1-1)|
……
Step 2.n：When being inserted into ground floor detecting system correspondence position, fuel stack under fuel assembly n-th layer screen work
Second layer detecting system correspondence position is inserted under part n-1 layers of screen work；Ground floor detecting system measures fuel assembly
N-1 layers of screen work position X1-n, second layer detecting system measures fuel assembly n-th layer screen work position X2-(n+1)；
Calculate and obtain fuel assembly of the fuel assembly n-th layer screen work relative to fuel assembly ground floor screen work 202
Deflection S1n。
S1n=| (X2-4-X1-3)+(X2-3-X1-2)+(X2-2-X1-1)+……+(X2-(n+1)-X1-n)|
Step 3：The every layer of fuel assembly screen work obtained from above-mentioned steps 2 is relative to fuel assembly ground floor screen work
Fuel assembly deflection in, choose maximum and be the deflection S of fuel assembly 2
Deflection S=MAX (the S of fuel assembly 212, S13, S14... ..., S1n), i.e. fuel assembly 2
Deflection S be every group fuel assembly deflection S12, S13, S14... ..., S1nIn maximum.
Step 4：Refueling machine lifts fuel assembly 2 from Spent Fuel Pool screen work 3, and fuel assembly 2 is put back to
Deposit position, completes the measurement of fuel assembly deflection.
The present invention is explained in detail above in conjunction with drawings and Examples, but the present invention be not limited to it is above-mentioned
Embodiment, in the ken that those of ordinary skill in the art possess, can also not depart from the present invention
Various changes can be made on the premise of objective.The content not being described in detail in the present invention can use existing skill
Art.
Claims (8)
1. a kind of fuel assembly deflection bilayer measuring system, it is characterised in that：The system includes measuring system
Matrix (403), ground floor detecting system and second layer detecting system, measuring system matrix are provided with (403)
Second layer detecting system is provided with upper toroidal cavity (A) and lower toroidal cavity (B), upper toroidal cavity (A),
Ground floor detecting system is provided with lower toroidal cavity (B).
2. a kind of fuel assembly deflection bilayer measuring system according to claim 1, it is characterised in that：
Described measuring system matrix (403) is in integrally hollow hexahedron, upper toroidal cavity (A), lower toroidal cavity
(B) connected with the centre bore (C) of measuring system matrix (403).
3. a kind of fuel assembly deflection bilayer measuring system according to claim 2, it is characterised in that：
Described second layer detecting system is by six second layer transmitter units (404) in upper toroidal cavity (A)
Constituted with six second layer receiving units (402)；Ground floor detecting system is by positioned at lower toroidal cavity (B)
Six interior ground floor transmitter units (405) and six ground floor receiving unit (401) compositions.
4. a kind of fuel assembly deflection bilayer measuring system according to claim 3, it is characterised in that：
1 described second layer transmitter unit (404) and second layer receiving unit (402) are one group, every group
Two layers of transmitter unit (404), second layer receiving unit (402) are arranged in hexagon measuring system matrix (403)
A side；1 ground floor transmitter unit (405) and ground floor receiving unit (401) are one group, every group
Ground floor transmitter unit (405), ground floor receiving unit (401) are arranged in hexagon measuring system matrix (403)
A side；Each ground floor transmitter unit (405) top one second layer transmitter unit (404) of arrangement,
Each ground floor receiving unit (401) top one second layer receiving unit (402) of arrangement.
5. a kind of fuel assembly deflection bilayer measuring system according to claim 4, it is characterised in that：
Described receiving unit, transmitter unit respectively uses laser emission element, laser receiving unit.
6. a kind of fuel assembly deflection bilayer measuring method, it is characterised in that the method specifically includes following
Step：
Step 1：Refueling machine captures fuel assembly (2) and moves to the Spent Fuel Pool detected for fuel assembly
Screen work (3) top；
Step 2：Refueling machine inserts in Spent Fuel Pool screen work (3) fuel assembly (2)；Down process,
Second layer detecting system, ground floor detecting system two-layer screen work adjacent to fuel assembly (2) successively are examined
Survey, obtain fuel assembly deflection of the every layer of fuel assembly screen work relative to fuel assembly ground floor screen work；
Step 3：The every layer of fuel assembly screen work obtained from above-mentioned steps 2 is relative to fuel assembly ground floor screen work
Fuel assembly deflection in, choose maximum and be the deflection S of fuel assembly (2).
7. a kind of fuel assembly deflection bilayer measuring method according to claim 6, it is characterised in that：
Described step 2 is specific as follows：
Step 2.1：Ground floor detecting system correspondence position is inserted under fuel assembly ground floor screen work (202),
Second layer detecting system correspondence position is inserted under fuel assembly second layer screen work (203)；Ground floor detecting system
Measure fuel assembly ground floor screen work (202) position X1-1, second layer detecting system measures second layer lattice
Frame (203) position X2-2；
Obtain fuel stack of fuel assembly second layer screen work (203) relative to fuel assembly ground floor screen work 202
Part deflection S12=| X2-2-X1-1|；
Step 2.2：When being inserted into ground floor detecting system correspondence position under fuel assembly second layer screen work (203),
Second layer detecting system correspondence position is inserted under fuel assembly third layer screen work (204)；Ground floor detecting system
The measurement second layer screen work (203) position X1-2, second layer detecting system measures third layer screen work (204) position
Put X2-3；
Obtain combustion of fuel assembly third layer screen work (203) relative to fuel assembly ground floor screen work (202)
Material component strain amount S13=| (X2-3-X1-2)+(X2-2-X1-1)|
Step 2.3：When being inserted into ground floor detecting system correspondence position under fuel assembly third layer screen work (204),
Second layer detecting system correspondence position is inserted under the 4th layer of screen work (205) of fuel assembly；Ground floor detecting system
Measure third layer screen work (204) position X1-3, second layer detecting system measures the 4th layer of screen work (205)
Position X2-4；
Obtain fuel assembly of the 4th layer of screen work 205 of fuel assembly relative to fuel assembly ground floor screen work 202
Deflection S14=| (X2-4-X1-3)+(X2-3-X1-2)+(X2-2-X1-1)|
……
Step 2.n：When being inserted into ground floor detecting system correspondence position, fuel stack under fuel assembly n-th layer screen work
Second layer detecting system correspondence position is inserted under part n-1 layers of screen work；Ground floor detecting system measures fuel assembly
N-1 layers of screen work position X1-n, second layer detecting system measures fuel assembly n-th layer screen work position X2-(n+1)；
Fuel assembly n-th layer screen work is obtained to become relative to the fuel assembly of fuel assembly ground floor screen work (202)
Shape amount S1n=| (X2-4-X1-3)+(X2-3-X1-2)+(X2-2-X1-1)+……+(X2-(n+1)-X1-n)|。
8. a kind of fuel assembly deflection bilayer measuring method according to claim 7, it is characterised in that：
Described step 3 is specific as follows：Deflection S=MAX (the S of fuel assembly (2)12, S13, S14... ...,
S1n), i.e. the deflection S of fuel assembly (2) is every group fuel assembly deflection S12, S13, S14... ...,
S1nIn maximum.
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|---|---|---|---|
| CN201511017832.5A CN106935291B (en) | 2015-12-30 | 2015-12-30 | A kind of fuel assembly deflection bilayer measuring system and measurement method |
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| CN109346201A (en) * | 2018-11-22 | 2019-02-15 | 河北工业大学 | A kind of nuclear fuel assembly internal modification detection device based on equivalent volume measurement |
| CN109360670A (en) * | 2018-12-03 | 2019-02-19 | 河北工业大学 | A kind of adaptive centering nuclear fuel assembly multifunctional detecting device |
| CN109373885A (en) * | 2018-12-21 | 2019-02-22 | 河北工业大学 | A kind of nuclear fuel assembly multifunctional detecting device based on array-type flexible detection |
| CN114440763A (en) * | 2020-11-05 | 2022-05-06 | 国核电站运行服务技术有限公司 | Fuel assembly on-line measuring device and method |
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| CN106935291B (en) | 2018-07-27 |
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