CN208208348U - 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
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- CN208208348U CN208208348U CN201721772721.XU CN201721772721U CN208208348U CN 208208348 U CN208208348 U CN 208208348U CN 201721772721 U CN201721772721 U CN 201721772721U CN 208208348 U CN208208348 U CN 208208348U
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- lattice cell
- type lattice
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- grid
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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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Abstract
The utility model 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.The utility model round tube lattice cell 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 utility model relates to fuel assembly technical fields, and in particular to a kind of band tubular type lattice cell fuel assembly positioning lattice
Frame.
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 2 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 this utility model is to provide a kind of band tubular type grid of annular fuel element that can adapt to big outer diameter
First spacer grid of fuel assembly.
Realize that the technical solution of the utility model aim is as follows: a kind of band tubular type lattice cell spacer grid of fuel assembly, it should
Grid spacer is mutually inserted by multiple cylinder type lattice cells and rearranges n × N-shaped square structure, the n × N-shaped square structure surrounding
Fix 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, non-four
Cylinder type lattice cell internal symmetry at angle forms four protrusion retaining parts, this four protrusion retaining parts can be with insertion cylinder
Fuel rod in type lattice cell forms line contact, and carries out lateral clamping to fuel rod；Cylinder type lattice cell in edge processes 1
A protrusion retaining part contacts to also be symmetrically formed four protrusion retaining parts and can form line with fuel rod, and to fuel rod
Carry out lateral clamping；2 protrusion retaining parts are processed in the cylinder type lattice cell of four corners, to also be symmetrically formed 4 protrusions
Retaining part 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 described in the utility model, the annular fuel component include upper tube socket, bottom nozzle, annular
Fuel rod, grid spacer and guide pipe, described in grid spacer use above-mentioned band tubular type lattice cell fuel assembly positioning lattice
Frame.
A kind of reactor described in the utility model, uses annular fuel component, which includes upper tube
Seat, bottom nozzle, annular fuel rod, grid spacer and guide pipe；Grid spacer described in it uses any of the above-described band tubular type
Lattice cell spacer grid of fuel assembly.
The remarkable result of the utility model is:
Band tubular type lattice cell spacer grid of fuel assembly described in the utility model, round tube lattice cell are mutually inserted, and are formed
Protrusion retaining part directly take on supporting role, compared with existing grid spacer, do not need additional supporting element, therefore structure
Simply, number of molds required when manufacture is few, and convenient for manufacture, while fluid resistance is small, has apparent advantage.
It is described in the utility model that common rod shape fuel can also be applied with tubular type lattice cell spacer grid of fuel assembly
Element, and coolant can be made more fully to contact with fuel element.
Band tubular type lattice cell spacer grid of fuel assembly described in the utility model possesses annular fuel component, can be applicable in
In the fuel element of bigger outer diameter, located lateral is provided 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 described in the utility model；
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 described in the utility model
Grid spacer 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 described in the utility model, this is fixed
Position screen work is mutually inserted by multiple cylinder type lattice cells 1 rearranges 13 × 13 type square structures, 13 × 13 type square structure
The outer band 2 of a circle is welded and fixed in surrounding；The height of outer band 2 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 7.
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 7 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.
Grid spacer described in the utility model is mutually inserted by multiple cylinder type lattice cells 1 and rearranges n × N-shaped side
Shape structure, wherein the value range of n is 2~17, such as n=2, n=10 or n=17.
Claims (11)
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 (7).
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 6, it is characterised in that: described leads
To quantity, the position consistency of tube passage (7) 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 (2) 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721772721.XU CN208208348U (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 |
|---|---|---|---|
| CN201721772721.XU CN208208348U (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 |
|---|---|
| CN208208348U true CN208208348U (en) | 2018-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721772721.XU Active CN208208348U (en) | 2017-12-19 | 2017-12-19 | A kind of band tubular type lattice cell spacer grid of fuel assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935365A (en) * | 2017-12-19 | 2019-06-25 | 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 CN201721772721.XU patent/CN208208348U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935365A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of band tubular type lattice cell spacer grid of fuel assembly |
| CN109935365B (en) * | 2017-12-19 | 2024-07-02 | 中国原子能科学研究院 | Positioning grid with circular tube type grid element fuel assembly |
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