CN109935365A - A kind of band tubular type lattice cell spacer grid of fuel assembly - Google Patents
A kind of band tubular type lattice cell spacer grid of fuel assembly Download PDFInfo
- Publication number
- CN109935365A CN109935365A CN201711369480.9A CN201711369480A CN109935365A CN 109935365 A CN109935365 A CN 109935365A CN 201711369480 A CN201711369480 A CN 201711369480A CN 109935365 A CN109935365 A CN 109935365A
- Authority
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- China
- Prior art keywords
- lattice cell
- type lattice
- grid
- fuel
- fuel assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 100
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 60
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 238000003780 insertion Methods 0.000 claims abstract description 3
- 230000037431 insertion Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 12
- 238000003672 processing method Methods 0.000 claims description 4
- 238000003032 molecular docking Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Fuel Cell (AREA)
Abstract
The present invention provides a kind of band tubular type lattice cell spacer grid of fuel assembly, which is mutually inserted by multiple cylinder type lattice cells and rearranges n × N-shaped square structure, and the n × N-shaped square structure surrounding fixes the outer band of a circle；Adjacent cylinders type lattice cell is mutually inserted position, and inside is protruded to each other, in this way at non-edge, the cylinder type lattice cell internal symmetry of non-four corners form four protrusion retaining parts, this four protrusion retaining parts can form line with the fuel rod in insertion cylinder type lattice cell and contact, and carry out lateral clamping to fuel rod.Round tube lattice cell of the present invention is mutually inserted, and the protrusion retaining part of formation directly takes on supporting role, compared with existing grid spacer, do not need additional supporting element, therefore structure is simple, when manufacture it is required number of molds it is few, convenient for manufacture, while fluid resistance is small, has apparent advantage.
Description
Technical field
The present invention relates to fuel assembly technical fields, and in particular to a kind of band tubular type lattice cell spacer grid of fuel assembly.
Background technique
In nuclear power plant reactor operational process, the performance of nuclear fuel be influence nuclear reactor safety and economy it is important because
Element.Therefore the research of fuel element is placed on status very outstanding always in the world, by the design of optimization fuel element, used
The methods of advanced configuration material, improvement component manufacturing process, are continuously improved the various performances of nuclear fuel element, promote nuclear power to more
Safe and more economical direction is developed.
Existing PWR fuel assembly design in, fuel rod generally using grid spacer clamp it is hanging by the way of.Positioning
Screen work plays a part of support clamping to fuel element, and needs to resist the gravity of fuel element, due to the effect of irradiation,
The chucking power for clamping the spring of fuel rod can strongly reduce, and fuel rod can generally be fallen on bottom nozzle, make in the flowing of coolant
Under, fuel rod may upper and lower play, this will lead to the risk of fuel rod breakage.
To optimize the parameter of fuel element, and general fuel assembly form construction design is used, so that novel component
It can be suitable for current mature reactor core.Novel annular fuel element is such as used, outer diameter becomes larger, and weight increases, at this time
The chucking power of required grid spacer may increase about 2-4 times, can place that such as spring, just the space of convex clamping piece has become smaller,
This probability that fuel element is fallen at runtime on bottom nozzle increases, and during to open heap again after cold-refueling
The probability of play also increases above and below fuel element.
Meanwhile in the design and manufacture of existing spacer grid of fuel assembly, grid spacer is substantially all by 6 groups of inside and outside band
At.Due to the complexity of its band, 30 multiple kinds of molds are needed when manufacturing.After mold determines, to change positioning lattice
The characteristic of frame, such as flow resistance generate better effect etc. to distribution of the coolant fuel assembly, need to change wherein
The shape of nearly all mold, considerably increases work load.
Therefore, it needs to design a kind of novel spacer grid of fuel assembly, with overcome the deficiencies in the prior art.
Summary of the invention
The purpose of the present invention is to provide a kind of band tubular type lattice cells of annular fuel element that can adapt to big outer diameter to fire
Expect component grid spacer.
Realize that the technical solution of the object of the invention is as follows: a kind of band tubular type lattice cell spacer grid of fuel assembly, the positioning
Screen work is mutually inserted by multiple cylinder type lattice cells and rearranges n × N-shaped square structure, and the n × N-shaped square structure surrounding is fixed
The one outer band of circle；Adjacent cylinders type lattice cell is mutually inserted position, and inside is protruded to each other, in this way at non-edge, non-four corners
Cylinder type lattice cell internal symmetry form four protrusion retaining parts, this four protrusion retaining parts can be with insertion cylinder type grid
Fuel rod in member forms line contact, and carries out lateral clamping to fuel rod；Cylinder type lattice cell in edge process 1 it is convex
Retaining part out is contacted to also be symmetrically formed four protrusion retaining parts and can form line with fuel rod, and is carried out to fuel rod
Laterally clamping；2 protrusion retaining parts are processed in the cylinder type lattice cell of four corners, to also be symmetrically formed 4 protrusion clampings
Position can form line with fuel rod and contact, and carry out lateral clamping to fuel rod.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, described in adjacent cylinders type lattice cell it is mutual
Grafting is that adjacent cylinders type lattice cell contacts with each other position with the slot that can be mutually inserted.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, the adjacent cylinders type lattice cell phase mutual connection
Contact portion position has the slot that can be mutually inserted, and one of cylinder type lattice cell has a upper slot from top to middle part, and one
Cylinder type lattice cell is with the lower slot from lower part to middle part；Docking is seated at middle part for upper slot and lower slot.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, described in edge cylinder type lattice cell
The cylinder type lattice cell for processing 1 protrusion retaining part and four corners processes 2 protrusion retaining parts, and processing method is punching
Press processing method.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, described in n × N-shaped square structure and outer
Band is fixed by welding manner.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, will be in the arrangement of n × n cylinder type lattice cell
Any lattice cell takes out, and the position of lattice cell vacancy is as guiding tube passage.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, described in guiding tube passage in setting lead
The drum outer wall of Xiang Guan, guide pipe and adjacent cylinders type lattice cell are fixed.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, described in guiding tube passage and upper tube socket
Guiding tube passage quantity, position consistency.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, described in outer band height and n × n
The height of a cylinder type lattice cell is identical.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, top edge and lower edge in outer band
It is equipped with guide vane, prevents fuel assembly from hooking mutually when assembly.
A kind of band tubular type lattice cell spacer grid of fuel assembly as described above, described in grid spacer pass through multiple circles
Cartridge type lattice cell, which is mutually inserted, rearranges n × N-shaped square structure, and wherein the value range of n is 2~17.
A kind of annular fuel component of the present invention, the annular fuel component include upper tube socket, bottom nozzle, annular fuel
Stick, grid spacer and guide pipe, described in grid spacer use above-mentioned band tubular type lattice cell spacer grid of fuel assembly.
A kind of reactor of the present invention, uses annular fuel component, the annular fuel component include upper tube socket, under
Tube socket, annular fuel rod, grid spacer and guide pipe；Grid spacer described in it is fired using any of the above-described band tubular type lattice cell
Expect component grid spacer.
Remarkable result of the invention is:
Band tubular type lattice cell spacer grid of fuel assembly of the present invention, round tube lattice cell are mutually inserted, formation it is convex
Retaining part directly takes on supporting role out, compared with existing grid spacer, does not need additional supporting element, therefore structure letter
Singly, number of molds required when manufacture is few, and convenient for manufacture, while fluid resistance is small, has apparent advantage.
It is of the present invention that common rod shaped fuel element can also be applied with tubular type lattice cell spacer grid of fuel assembly,
And coolant can be made more fully to contact with fuel element.
Band tubular type lattice cell spacer grid of fuel assembly of the present invention possesses annular fuel component, can be suitable for more
The fuel element of big outer diameter provides located lateral to fuel element and generates certain effect of mixing to coolant.
Detailed description of the invention
Fig. 1 is a kind of band tubular type lattice cell spacer grid of fuel assembly structural schematic diagram of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is upper inserting slot construction schematic diagram；
Fig. 4 is underthrust slot structure schematic diagram；
Fig. 5 is the band tubular type lattice cell spacer grid of fuel assembly structural schematic diagram with guide pipe；
In figure: 1. tubular type lattice cells；2. outer band；3. protruding retaining part；4. outer band guide vane；Slot on 5.；6.
Lower slot；7. being oriented to tube passage.
Specific embodiment
With reference to the accompanying drawings and detailed description to a kind of band tubular type lattice cell fuel assembly positioning of the present invention
Screen work is described further.
Embodiment 1
As shown in Figures 1 to 4, a kind of band tubular type lattice cell spacer grid of fuel assembly of the present invention, the positioning lattice
Frame is mutually inserted by multiple cylinder type lattice cells 1 and rearranges 13 × 13 type square structures, 13 × 13 type square structure surrounding
The outer band 2 of a circle is welded and fixed；The height of outer band 6 is identical as the height of 13 × 13 cylinder type lattice cells 1.
Adjacent cylinders type lattice cell 1 is mutually inserted position, and inside is protruded to each other, in this way at non-edge, the circle of non-corner
4 protrusion retaining parts, 3,4 protrusion retaining parts 3 are formd inside cartridge type lattice cell to be contacted with fuel rod formation line, to combustion
Charge bar carries out lateral clamping；
The cylinder type lattice cell impact style of edge processes 1 protrusion retaining part 3, to also form four protrusion folders
Holding position can contact with fuel rod formation line, and carry out lateral clamping to fuel rod；
The cylinder type lattice cell impact style of four corners processes 2 protrusion retaining parts 3, to also form four protrusions
Retaining part can form line with fuel rod and contact, and carry out lateral clamping to fuel rod.
As shown in Figure 3 and Figure 4, the adjacent cylinders type lattice cell is mutually inserted, and is that adjacent cylinders type lattice cell contacts with each other
Position has the slot that can be mutually inserted.One of cylinder type lattice cell has the upper slot 5 from top to middle part, a circle
Cartridge type lattice cell is with the lower slot 6 from lower part to middle part；Docking is seated at middle part for upper slot 5 and lower slot 6.
The cylinder type lattice cell of the edge processes 1 protrusion retaining part and the cylinder type lattice cell of four corners adds
Work goes out 2 protrusion retaining parts, and processing method is punch process mode.
Embodiment 2
Difference from example 1 is that:
A lattice cell in the arrangement of 13 × 13 cylinder type lattice cells is taken out, the position of lattice cell vacancy is as guiding tube passage 3.
Guide pipe is set in the guiding tube passage, and the drum outer wall of guide pipe and adjacent cylinders type lattice cell is fixed.
Quantity, the position consistency of the guiding tube passage of the guiding tube passage 3 and upper tube socket.
It is equipped with guide vane 4 in the top edge of outer band 2 and lower edge, prevents fuel assembly mutual hook when assembly
It hangs.
Embodiment 3
A kind of annular fuel component, the annular fuel component include upper tube socket, bottom nozzle, annular fuel rod, grid spacer
And guide pipe, the grid spacer is using the positioning of either strap tubular type lattice cell fuel assembly described in above-described embodiment 1 or 2
Screen work.
Embodiment 4
A kind of reactor uses annular fuel component, which includes upper tube socket, bottom nozzle, annular combustion
Charge bar, grid spacer and guide pipe；The grid spacer uses any of the above-described band tubular type lattice cell fuel assembly positioning lattice
Frame.
Heretofore described grid spacer is mutually inserted by multiple cylinder type lattice cells 1 and rearranges the rectangular knot of n × N-shaped
Structure, wherein the value range of n is 2~17, such as n=2, n=10 or n=17.
Claims (13)
1. a kind of band tubular type lattice cell spacer grid of fuel assembly, it is characterised in that: the grid spacer passes through multiple cylinder type grid
First (1), which is mutually inserted, rearranges n × N-shaped square structure, and the n × N-shaped square structure surrounding fixes the outer band (2) of a circle；
Adjacent cylinders type lattice cell (1) is mutually inserted position, and inside is protruded to each other, in this way at non-edge, the circle of non-four corners
Cartridge type lattice cell (1) internal symmetry forms four protrusion retaining parts (3), this four protrusion retaining parts (3) can justify with insertion
Fuel rod in cartridge type lattice cell (1) forms line contact, and carries out lateral clamping to fuel rod；
Cylinder type lattice cell (1) in edge processes 1 protrusion retaining part (3), to also be symmetrically formed four protrusion folders
Holding position (3) can contact with fuel rod formation line, and carry out lateral clamping to fuel rod；
2 protrusion retaining parts (3) are processed in the cylinder type lattice cell (1) of four corners, to also be symmetrically formed 4 protrusion clampings
Position can form line with fuel rod and contact, and carry out lateral clamping to fuel rod.
2. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 1, it is characterised in that: the phase
Adjacent cylinder type lattice cell is mutually inserted, and is that adjacent cylinders type lattice cell contacts with each other position with the slot that can be mutually inserted.
3. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 2, it is characterised in that: described adjacent
Cylinder type lattice cell contacts with each other position with the slot that can be mutually inserted, and one of cylinder type lattice cell has from top in
The upper slot (5) in portion, a cylinder type lattice cell is with the lower slot (6) from lower part to middle part；Upper slot (5) and lower slot (6)
At middle part, docking is seated.
4. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 1, it is characterised in that: the side
Cylinder type lattice cell at edge processes 1 protrusion retaining part and the cylinder type lattice cell of four corners processes 2 protrusion clampings
Position, processing method are punch process mode.
5. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 1, it is characterised in that: the n
× N-shaped square structure is fixed with outer band (2) by welding manner.
6. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 1, it is characterised in that: by n × n circle
Any lattice cell in the arrangement of cartridge type lattice cell takes out, and the position of lattice cell vacancy is as guiding tube passage (3).
7. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 6, it is characterised in that: described leads
Guide pipe is set into tube passage, and the drum outer wall of guide pipe and adjacent cylinders type lattice cell is fixed.
8. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 1, it is characterised in that: described leads
To quantity, the position consistency of tube passage (3) and the guiding tube passage of upper tube socket.
9. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 1, it is characterised in that: described is outer
The height of band (6) is identical as the height of n × n cylinder type lattice cell (1).
10. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 1, it is characterised in that: item outside
The top edge of band (2) and lower edge are equipped with guide vane (4), prevent fuel assembly from hooking mutually when assembly.
11. a kind of band tubular type lattice cell spacer grid of fuel assembly according to claim 1, it is characterised in that: described
Grid spacer is mutually inserted by multiple cylinder type lattice cells (1) and rearranges n × N-shaped square structure, and wherein the value range of n is
2~17.
12. a kind of annular fuel component, the annular fuel component include upper tube socket, bottom nozzle, annular fuel rod, grid spacer with
And guide pipe, it is characterised in that: the grid spacer is using either strap tubular type lattice cell fuel described in claim 1 to 11
Component grid spacer.
13. a kind of reactor uses annular fuel component, which includes upper tube socket, bottom nozzle, annular fuel
Stick, grid spacer and guide pipe；It is characterized by: the grid spacer is using either strap described in claim 1 to 11
Tubular type lattice cell spacer grid of fuel assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369480.9A CN109935365A (en) | 2017-12-19 | 2017-12-19 | A kind of band tubular type lattice cell spacer grid of fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369480.9A CN109935365A (en) | 2017-12-19 | 2017-12-19 | A kind of band tubular type lattice cell spacer grid of fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109935365A true CN109935365A (en) | 2019-06-25 |
Family
ID=66983169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711369480.9A Pending CN109935365A (en) | 2017-12-19 | 2017-12-19 | A kind of band tubular type lattice cell spacer grid of fuel assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109935365A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477360A (en) * | 2020-05-25 | 2020-07-31 | 中国原子能科学研究院 | Annular fuel assembly location grillwork |
| CN115171923A (en) * | 2022-06-24 | 2022-10-11 | 上海核工程研究设计院有限公司 | Grid structure of fuel assembly and positioning grillwork |
| CN115171923B (en) * | 2022-06-24 | 2024-06-07 | 上海核工程研究设计院股份有限公司 | Fuel assembly grid structure and positioning grid |
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| GB1304520A (en) * | 1969-09-03 | 1973-01-24 | ||
| GB2022907A (en) * | 1978-05-12 | 1979-12-19 | Atomic Energy Authority Uk | Improvements in or relating to cellular grid structures |
| JPH0572382A (en) * | 1991-05-28 | 1993-03-26 | Mitsubishi Nuclear Fuel Co Ltd | Nuclear fuel assembly disassembling method |
| WO1994020962A1 (en) * | 1993-03-08 | 1994-09-15 | Combustion Engineering, Inc. | Mixing spacer grid for pwr and bwr applications |
| JPH10186074A (en) * | 1996-12-27 | 1998-07-14 | Mitsubishi Heavy Ind Ltd | Aseismatic grid of fuel assembly for nuclear reactor, fuel assembly, and nuclear reactor core |
| US20060153327A1 (en) * | 2005-01-11 | 2006-07-13 | Westinghouse Electric Company Llc | Helically fluted tubular fuel rod support |
| JP2007093520A (en) * | 2005-09-30 | 2007-04-12 | Nuclear Fuel Ind Ltd | Fuel assembly for pressurized water reactor and its support grid |
| JP2007232467A (en) * | 2006-02-28 | 2007-09-13 | Toshiba Corp | Nuclear fuel assembly and its manufacturing method |
| US20090052607A1 (en) * | 2007-06-26 | 2009-02-26 | Korea Atomic Energy Research Institute | Spacer Grid for Close-Spaced Nuclear Fuel Rods |
| CN102091737A (en) * | 2010-12-01 | 2011-06-15 | 中核建中核燃料元件有限公司 | Automatic punching device for lattice cell pipe of spacer grid |
| CN102270511A (en) * | 2011-07-18 | 2011-12-07 | 中国原子能科学研究院 | Tubular positioning grid for pressurized water reactor double-sided cooling fuel rod |
| CN208208348U (en) * | 2017-12-19 | 2018-12-07 | 中国原子能科学研究院 | A kind of band tubular type lattice cell spacer grid of fuel assembly |
-
2017
- 2017-12-19 CN CN201711369480.9A patent/CN109935365A/en active Pending
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|---|---|---|---|---|
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| GB1304520A (en) * | 1969-09-03 | 1973-01-24 | ||
| US3772148A (en) * | 1969-09-03 | 1973-11-13 | Atomic Energy Authority Uk | Nuclear reactor fuel element spacer grid |
| GB2022907A (en) * | 1978-05-12 | 1979-12-19 | Atomic Energy Authority Uk | Improvements in or relating to cellular grid structures |
| JPH0572382A (en) * | 1991-05-28 | 1993-03-26 | Mitsubishi Nuclear Fuel Co Ltd | Nuclear fuel assembly disassembling method |
| WO1994020962A1 (en) * | 1993-03-08 | 1994-09-15 | Combustion Engineering, Inc. | Mixing spacer grid for pwr and bwr applications |
| JPH10186074A (en) * | 1996-12-27 | 1998-07-14 | Mitsubishi Heavy Ind Ltd | Aseismatic grid of fuel assembly for nuclear reactor, fuel assembly, and nuclear reactor core |
| US20060153327A1 (en) * | 2005-01-11 | 2006-07-13 | Westinghouse Electric Company Llc | Helically fluted tubular fuel rod support |
| JP2007093520A (en) * | 2005-09-30 | 2007-04-12 | Nuclear Fuel Ind Ltd | Fuel assembly for pressurized water reactor and its support grid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477360A (en) * | 2020-05-25 | 2020-07-31 | 中国原子能科学研究院 | Annular fuel assembly location grillwork |
| CN115171923A (en) * | 2022-06-24 | 2022-10-11 | 上海核工程研究设计院有限公司 | Grid structure of fuel assembly and positioning grillwork |
| CN115171923B (en) * | 2022-06-24 | 2024-06-07 | 上海核工程研究设计院股份有限公司 | Fuel assembly grid structure and positioning grid |
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