CN115171923A - Grid structure of fuel assembly and positioning grillwork - Google Patents
Grid structure of fuel assembly and positioning grillwork Download PDFInfo
- Publication number
- CN115171923A CN115171923A CN202210723281.8A CN202210723281A CN115171923A CN 115171923 A CN115171923 A CN 115171923A CN 202210723281 A CN202210723281 A CN 202210723281A CN 115171923 A CN115171923 A CN 115171923A
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- fuel assembly
- fuel
- clamping
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- 239000000446 fuel Substances 0.000 title claims abstract description 98
- 125000006850 spacer group Chemical group 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims 5
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 230000000712 assembly Effects 0.000 abstract description 7
- 238000000429 assembly Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 210000002105 tongue Anatomy 0.000 description 19
- 238000003466 welding Methods 0.000 description 19
- 239000012530 fluid Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000003758 nuclear fuel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/34—Spacer grids
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/34—Spacer grids
- G21C3/344—Spacer grids formed of assembled tubular elements
-
- 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)
- Fuel-Injection Apparatus (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a grid structure of a fuel assembly and a spacer grid, relates to the technical field of fuel assemblies, solves the problem that the grid cells of the existing grid can not be applied to the dense arrangement of small-diameter fuel rods, and ensures the clamping and fixing effects on the fuel rods, and the specific scheme is as follows: the support grid cell structure comprises a plurality of support grid cells and fixed connection units, wherein the support grid cells are of special-shaped tube structures, the special-shaped tubes are mutually spliced and arranged to form a square structure, a circle of outer strips are fixed on the periphery of the square structure, and the fixed connection units are arranged in the square structure at intervals; the tube walls of the special-shaped tubes are inwards recessed at intervals along the circumferential direction of the special-shaped tubes to form clamping portions for clamping the fuel rods, and the other tube walls of the special-shaped tubes are used as connecting portions and are fixedly connected with the connecting portions of the adjacent special-shaped tubes.
Description
Technical Field
The invention relates to the technical field of fuel assemblies, in particular to a grid structure and a positioning grid of a fuel assembly.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
A pressurized water nuclear reactor fuel assembly is generally composed of a number of fuel rods, guide tube members, instrumentation tube members, grids, upper and lower headers, and the like.
The grids are used as important components of the fuel assembly framework, and after being connected with the guide pipe and the instrument pipe, the grids, together with the upper pipe seat and the lower pipe seat, form the fuel assembly framework and play roles in structural support and transverse load transfer.
The inventor finds that the existing grid cells are suitable for arrangement of commercial pressurized water reactor fuel assemblies, and the existing commercial pressurized water reactor fuel assemblies have larger fuel rod spacing, generally about 10-15 mm; in order to increase the heat exchange area of the fuel, a thinner rod diameter and a tighter grid cell design are needed, so that the fuel rod pitch is reduced to about 7-9 mm, and the gap space between the solid bodies is reduced to 1-3 mm, which is only 2-6 times of the thickness of the spring leaf material. When the existing grid is used for densely arranging the fuel rods with the small rod diameters of the fuel assembly for the marine nuclear power device, the steel protrusions and the springs of the grid can not be installed due to the influence of the densely arranged intervals of the fuel rods with the small rod diameters, the fuel rods can not be fixed, the fuel rods are easy to be damaged due to flow-induced vibration, and when the existing grid cells of the grid are densely arranged on the fuel rods with the small rod diameters, cooling channels among the fuel rods can be closed, so that the cooling of the fuel rods is seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a grid structure of a fuel assembly and a positioning grid, wherein fuel rods are clamped and fixed by using special-shaped tubes, the inward-concave inner walls of the special-shaped tubes are used for replacing rigid protrusions and springs, and cooling channels for cooling are formed between the adjacent special-shaped tubes, so that the problems that the small-diameter dense fuel rods cannot be fixed and the cooling of the fuel rods is easily influenced when the small-diameter dense fuel rods are densely arranged in the grid cells of the conventional grid are effectively solved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a grid structure of a fuel assembly, which comprises a plurality of supporting grid elements and fixed connection units, wherein the supporting grid elements are of special-shaped tube structures, the special-shaped tubes are mutually spliced and arranged to form a square structure, a circle of outer strips are fixed on the periphery of the square structure, and the fixed connection units are arranged in the square structure at intervals; the pipe wall of the special pipe is inwards recessed at intervals along the circumferential direction to form clamping parts for clamping the fuel rods, and the other pipe walls of the special pipe are used as connecting parts and are fixedly connected with the connecting parts of the adjacent special pipes.
In a further implementation manner, the clamping portions extend along the axis of the special pipe, and the size of an inscribed circle formed by enclosing all the clamping portions on the special pipe is matched with the outer diameter of the fuel rod to be clamped.
As a further implementation manner, the clamping portion is a spiral line structure distributed along the axial direction of the special pipe.
As a further implementation manner, the adjacent special tubes are enclosed by the adjacent connecting parts and clamping parts to form a cooling channel.
As a further implementation manner, the section tube is a column tube structure with a constant cross section in the axial direction, and the size of the clamping portion in the axial direction is constant.
As a further implementation manner, the special pipe is of a column pipe structure with a variable cross section in the axial direction, a gap exists between the clamping portion at the two ends of the special pipe and the outer wall of the fuel rod, and the clamping portion at the middle position of the special pipe is in interference fit with the fuel rod, so that the pressure drop at the two ends of the special pipe is reduced.
As a further implementation manner, the fixed connection unit is formed by enclosing a plurality of welding tongues, and the length of each welding tongue is greater than that of the special-shaped pipe.
As a further implementation manner, the weld tongue is composed of a middle arc part and two opposite extension parts, the arc part can be matched with the adjacent arc part to form an annular positioning structure for installing the grid sleeve, and the extension parts are used for enlarging the contact area of the weld tongue and the special-shaped pipe.
In a second aspect, the invention provides a spacer grid, which includes a plurality of fuel assembly grid structures described in the first aspect, wherein the plurality of fuel assembly grid structures are sequentially arranged at intervals, and the special pipes on adjacent fuel assembly grid structures are in one-to-one correspondence and are coaxially arranged between the corresponding special pipes.
As a further implementation mode, the fuel assembly grid structure further comprises a plurality of grid sleeves, the grid sleeves penetrate through all the fuel assembly grid structures, and the grid sleeves are fixedly arranged in the fixed connection units.
The beneficial effects of the invention are as follows:
(1) The support grid cells are of special-shaped tube structures, the tube walls of the special-shaped tubes are inwards sunken to form clamping parts, the clamping parts are arranged at intervals along the circumferential direction of the special-shaped tubes, fuel rods can be clamped and fixed through the cooperation between the clamping parts, the use of rigid protrusions of inner strips, springs and the like is omitted, the problem that the use of the support grid cells is easily affected by the size and the distance of the fuel rods is effectively solved, and the support grid cells are suitable for dense arrangement of the fuel rods with small diameters.
(2) The clamping part extends along the radial direction of the special pipe, and can axially support the outer wall of the fuel rod, so that the clamping is ensured, and the rigidity of the fuel rod is improved.
(3) The special pipe adopts a variable cross section structure, when cooling water passes through the middle position of the special pipe, the flow velocity of the cooling water is increased due to the reduction of the flow cross section, and the increase of the flow velocity is accompanied with the reduction of the fluid pressure, so that the adsorption effect is generated, the pressure drop at two ends of the special pipe is reduced, and the cooling speed of fuel rods in the special pipe is ensured.
(4) The welding tongue consists of the middle arc part and the extending parts arranged oppositely at two sides of the middle arc part, and the arc part can be matched with other adjacent arc parts to form an annular positioning structure, so that the fixation of the framework sleeve and the grid is realized, and the problem that the framework sleeve is incompatible with a special pipe structure is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
FIG. 1 is a schematic front view of a fuel assembly grid structure according to one or more embodiments of the present disclosure;
FIG. 2 is a side view schematic illustration of a fuel assembly grid structure according to one or more embodiments of the present disclosure;
FIG. 3 is an enlarged partial schematic view of the location of structure A shown in FIG. 1;
in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;
wherein, 1, special-shaped pipes; 2. a weld tongue; 3. an outer band; 4. a fuel rod; 5. a cooling channel; 6. a fixed connection unit; 7. a clamping part; 8. a connecting portion; 9. an arc-shaped portion; 10. an extension portion.
The noun explains:
flow-induced vibration: when fluid flows through a solid, fluid force among alternative phases is applied to the surface of the solid, so that the solid reciprocates, the reciprocating motion of the solid changes the fluid state of the fluid, and further changes the fluid force acting on the surface of the solid, and the phenomenon of interaction between the fluid and the solid is called flow-induced vibration;
pressure drop: the pressure drop due to energy loss when the fluid flows in the pipe.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As described in the background art, when the conventional grid cells are used for densely arranging fuel rods with small rod diameters of a fuel assembly for a marine nuclear power device, rigid protrusions and springs of the grid cells cannot be arranged due to the influence of the densely arranged intervals of the small rod diameters, the small-diameter dense fuel rods cannot be fixed, the fuel rods are easily damaged due to flow-induced vibration, and when the conventional grid cells are densely arranged, cooling channels between the fuel rods are closed, so that the cooling of the fuel rods is seriously influenced.
Example 1
In an exemplary embodiment of the present invention, as shown in fig. 1 to 3, a fuel assembly grid structure is provided, which has a capability of fixing and supporting a fuel assembly in a narrow space, and includes a special pipe 1, a weld tongue 2 and an outer strip 3, wherein the special pipe 1 mainly supports a fuel rod 4 in a transverse direction, and plays a role of clamping and fixing the fuel rod 4; the weld tongues 2 mainly play a role in transition to avoid the problem of incompatibility between the grid sleeves and the special pipes.
The outer contour of the grid structure is square, and the grid structure is formed by welding a plurality of special pipes 1, welding tongues 2 and outer strips 3, specifically, a plurality of special pipes 1 are spliced with one another to form an n x n square structure, adjacent special pipes 1 are fixed by welding, a circle of outer strips 3 are welded and fixed around the square structure, the width of each outer strip 3 is the same as the length of the corresponding special pipe 1, fixing connection units 6 are arranged in the square structure at intervals, each special pipe 1 is a support grid element, and a cylindrical fuel rod 4 can be fixed in each support grid element.
As shown in fig. 3, the tube wall of the special tube 1 is recessed inward to form a clamping portion 7 for clamping the fuel rod 4, and the remaining tube wall of the special tube 1 is used as a connecting portion 8 to cooperate with the connecting portion of the adjacent special tube 1 to realize the fixed connection of the adjacent special tube 1.
The clamping parts 7 are provided with a plurality of clamping parts 7, the number of the clamping parts is at least two (the clamping parts 7 are arranged oppositely when being arranged two), the number of the clamping parts 7 is four, the clamping parts 7 are arranged at intervals along the annular direction of the special pipe 1 and extend along the axial direction of the special pipe 1, the size of an inner circle formed by enclosing and combining all the clamping parts 7 on the special pipe 1 is matched with the outer diameter of the fuel rod 4 needing to be clamped, and the fuel rod 4 placed in the special pipe 1 can be clamped and fixed under the matching of the clamping parts 7.
The lateral part that the clamping part is used for contact, connection (the position of clamping part and 4 outer wall contacts of fuel rod promptly) is ARC structure, adopts contact between line contact's mode and the 4 outer walls of fuel rod, when guaranteeing clamping part 7 to 4 centre gripping stability of fuel rod, still is favorable to improving the ability of resistance to wears of fuel rod.
It can be understood that, in other embodiments, the clamping portion 7 may also be configured as a spiral structure distributed along the axial direction of the tube 1, and in this case, the clamping portion may be a single continuous spiral, or may be a spiral structure formed by combining multiple sections, which may be determined according to actual design requirements, where no limitation is made, and the spiral structure of the clamping portion 7 greatly improves the heat transfer efficiency of the fuel rod.
The clamping part 7 is arranged, so that the use of the inner strip of rigid protrusion and the spring is eliminated, the problems of rigid protrusion and difficulty in mounting the spring when the thin-diameter fuel rods are densely arranged are effectively solved, the clamping part 7 extends along the axial direction of the special pipe 1, the rigidity of the fuel rods 4 is improved while clamping is guaranteed, and the distance between the fuel rods 4 is kept.
The connecting parts 8 are also provided with a plurality of connecting parts 8, the connecting parts 8 protrude outwards relative to the clamping parts, and the connecting parts 8 are arranged at intervals along the circumferential direction of the special-shaped pipe 1 and extend along the axial direction of the special-shaped pipe 1 and can be matched with the connecting parts 8 adjacent to the special-shaped pipe 1 to realize fixed connection.
The lateral part (namely the position where the connecting part is contacted with the connecting part of the adjacent special pipe 1) of the connecting part 8 for contact and connection is of a plane structure, so that the contact area between the connecting parts 8 is enlarged, the welding is firmer, the butt joint between the connecting parts 8 and the connecting parts 8 is facilitated, and the installation difficulty is reduced.
Due to the arrangement of the clamping parts 7 and the connecting parts 8, when the adjacent special pipes 1 are connected, gaps are formed between the adjacent special pipes 1 under the action of the clamping parts 7 and the connecting parts 8, after the adjacent special pipes 1 are spliced and arranged, the cooling channel 5 can be formed between the adjacent special pipes 1 by combining a plurality of gaps, and the cooling channel 5 is formed by surrounding the adjacent connecting parts 8 and the clamping parts 7 and cannot be closed due to the influence of the diameter of the special pipes 1, so that the problem that the cooling channel 5 is easy to close when the thin-diameter fuel rods 4 are densely arranged is solved.
The section tube 1 may be a column tube structure with an axially unchanged section, or may be arranged along an axially variable section, specifically, the axially unchanged section is the dimension of the clamping portion 7 in the axial direction of the section tube 1 remains unchanged; the size of the clamping part 7 is changed and smoothly transited along the axial direction of the special pipe 1 along the axial variable section, so that a gap of 0-0.2 mm exists between the two ends of the special pipe 1 and the outer wall of the fuel rod 4, and an interference fit of about 0.2mm exists between the middle position of the special pipe 1 and the fuel rod 4 to provide clamping force, namely the diameters of the two ends of the special pipe 1 are larger than the middle diameter, and the clamping part only plays a role in clamping at the middle position.
When the structure form of the variable cross section is adopted, when cooling water passes through the middle position of the section pipe 1, the flow velocity of the cooling water can be increased due to reduction of the flow cross section, and meanwhile, the increase of the flow velocity is accompanied with the reduction of fluid pressure, so that an adsorption effect is generated, the pressure drop at the two ends of the section pipe is reduced, the loss of the flow velocity of the cooling water is avoided, and the cooling speed of a fuel rod in the section pipe 1 is ensured.
It will be appreciated that the size setting of the clamping portion 7 can be determined according to actual design requirements without undue limitation.
The welding tongues 2 are provided with a plurality of welding tongues, four welding tongues 2 are enclosed to form a fixed connection unit 6, the fixed connection units 6 are fixedly arranged among a plurality of special-shaped tubes 1 at intervals, the length of each welding tongue 2 is greater than that of each special-shaped tube 1, so that the welding tongues 2 penetrate through the grid structure, as shown in fig. 1, each welding tongue 2 is composed of an arc-shaped part in the middle and extending parts 10 which are oppositely arranged on two sides of each arc-shaped part 9, each arc-shaped part 9 can be matched with three adjacent arc-shaped parts 9 to form an annular positioning structure, grid sleeves can be placed among the four arc-shaped parts 9, and the outer walls of the grid sleeves are fixedly connected with the arc-shaped parts 9 in a welding mode;
the extending parts 10 extend towards two sides of the arc-shaped part 9 far away from the center of the circle and are mainly used for fixing the positions of the welding tongues 2, the welding tongues 2 can be welded and fixed with the adjacent special pipes 1 through the extending parts 10, and compared with a mode of only utilizing the arc-shaped parts for welding and fixing, the welding tongues 2 and the special pipes 1 are larger in contact area and higher in installation stability.
Through the matching use of the welding tongues 2 and the special pipes 1, the full-angle azimuth space can be utilized, so that the fixed clamping work of dense space which cannot be completed by strip grid cells is realized (the traditional strip grid intelligently utilizes specific angles, such as 0 degree, 90 degrees, 180 degrees and 270 degrees).
It will be appreciated that the grid sleeves are structures for receiving pipelines and other control components, and therefore the specific dimensions of the fixed connection units 6 need to be determined according to the outer diameter of the grid sleeves, without undue limitation.
Example 2
In another exemplary embodiment of the present invention, a spacer grid is provided, which includes a plurality of the fuel assembly grid structures described in example 1 and a plurality of grid sleeves, wherein the plurality of fuel assembly grid structures are sequentially arranged at intervals, and all the fuel assembly grid structures are parallel to each other, so that the special pipes 1 on the adjacent fuel assembly grid structures are in one-to-one correspondence, and the special pipes 1 are coaxially arranged to clamp and fix the fuel rods 4; similarly, the fixed connection units 6 on the grid structures of the adjacent fuel assemblies are in one-to-one correspondence, and the corresponding fixed connection units 6 are coaxially arranged for fixed installation of the grid sleeves.
The grid sleeve penetrates through all the grid structures of the fuel assemblies, the grid sleeve is fixedly arranged in the fixed connection unit 6, and functional components such as pipelines and control assemblies can be arranged in the grid sleeve as required.
It will be appreciated that the number of fuel assembly lattice structures and the spacing between adjacent fuel assembly lattice structures may be selected according to practical requirements without undue limitation.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fuel assembly grid structure is characterized by comprising a plurality of supporting grid cells and fixed connecting units, wherein the supporting grid cells are of special-shaped tube structures, the special-shaped tubes are spliced and arranged to form a square structure, a circle of outer strips are fixed on the periphery of the square structure, and the fixed connecting units are arranged in the square structure at intervals; the pipe wall of the special pipe is inwards recessed at intervals along the circumferential direction to form clamping parts for clamping the fuel rods, and the other pipe walls of the special pipe are used as connecting parts and are fixedly connected with the connecting parts of the adjacent special pipes.
2. The fuel assembly grid structure of claim 1, wherein the clamping portions extend along the axis of the tube, and the inscribed circle defined by all the clamping portions on the tube has a size matched with the outer diameter of the fuel rod to be clamped.
3. A fuel assembly grid construction according to claim 1 wherein said clamps are helical in configuration along the axial direction of the tube.
4. A fuel assembly grid structure according to claim 1, wherein adjacent tubes are surrounded by adjacent connecting and clamping portions to form cooling passages.
5. A fuel assembly grid construction according to claim 1, wherein the tubes are of axially constant cross-section cylindrical construction, and the clips are axially constant in size.
6. The fuel assembly grid structure according to claim 1, wherein the mechanical tubes are column tube structures with axially-variable cross sections, gaps exist between clamping parts at two ends of the mechanical tubes and outer walls of the fuel rods, and the clamping parts at the middle positions of the mechanical tubes are in interference fit with the fuel rods and used for reducing pressure drop at two ends of the mechanical tubes.
7. A fuel assembly grid construction according to claim 1 wherein said fixed connection elements are defined by a plurality of weld tabs, said weld tabs being longer than the length of the profile tube.
8. A fuel assembly grid construction according to claim 7 wherein the tabs are formed by a central arcuate portion and opposed extensions on either side thereof which cooperate with adjacent arcuate portions to form the annular locating formations for mounting grid sleeves, the extensions serving to increase the contact area of the tabs with the tubes.
9. A spacer grid comprising a plurality of fuel assembly grid structures according to any one of claims 1 to 8, wherein the plurality of fuel assembly grid structures are arranged in a spaced apart relationship in sequence, and wherein the tubes of adjacent fuel assembly grid structures are arranged in a one-to-one correspondence and coaxially with one another.
10. A spacer grid according to claim 9 further comprising a plurality of grid sleeves extending through all of the fuel assembly cell structures, the grid sleeves being fixedly disposed within the fixed connection elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210723281.8A CN115171923B (en) | 2022-06-24 | 2022-06-24 | Fuel assembly grid structure and positioning grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210723281.8A CN115171923B (en) | 2022-06-24 | 2022-06-24 | Fuel assembly grid structure and positioning grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115171923A true CN115171923A (en) | 2022-10-11 |
| CN115171923B CN115171923B (en) | 2024-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210723281.8A Active CN115171923B (en) | 2022-06-24 | 2022-06-24 | Fuel assembly grid structure and positioning grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115171923B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060153327A1 (en) * | 2005-01-11 | 2006-07-13 | Westinghouse Electric Company Llc | Helically fluted tubular fuel rod support |
| 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 |
| CN202948743U (en) * | 2012-12-20 | 2013-05-22 | 中国核动力研究设计院 | Structural grillwork with bottom rectifying effect for nuclear fuel assembly |
| CN103177776A (en) * | 2013-01-14 | 2013-06-26 | 上海核工程研究设计院 | Fuel assembly positioning grid capable of preventing fuel rod from being scratched and subjected to vibrating abrasion |
| CN107980163A (en) * | 2017-09-20 | 2018-05-01 | 岭澳核电有限公司 | Grid spacer and fuel assembly |
| US20180286524A1 (en) * | 2017-03-31 | 2018-10-04 | Westinghouse Electric Company Llc | Spacer Grid Using Tubular Cells With Mixing Vanes |
| CN109935370A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit |
| CN109935367A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of spacer grid of fuel assembly and fuel assembly of band buckle |
| 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 |
| CN111477358A (en) * | 2020-05-25 | 2020-07-31 | 中国原子能科学研究院 | Strip grid cell combined positioning grid |
-
2022
- 2022-06-24 CN CN202210723281.8A patent/CN115171923B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060153327A1 (en) * | 2005-01-11 | 2006-07-13 | Westinghouse Electric Company Llc | Helically fluted tubular fuel rod support |
| 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 |
| CN202948743U (en) * | 2012-12-20 | 2013-05-22 | 中国核动力研究设计院 | Structural grillwork with bottom rectifying effect for nuclear fuel assembly |
| CN103177776A (en) * | 2013-01-14 | 2013-06-26 | 上海核工程研究设计院 | Fuel assembly positioning grid capable of preventing fuel rod from being scratched and subjected to vibrating abrasion |
| US20180286524A1 (en) * | 2017-03-31 | 2018-10-04 | Westinghouse Electric Company Llc | Spacer Grid Using Tubular Cells With Mixing Vanes |
| CN107980163A (en) * | 2017-09-20 | 2018-05-01 | 岭澳核电有限公司 | Grid spacer and fuel assembly |
| CN109935370A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit |
| CN109935367A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of spacer grid of fuel assembly and fuel assembly of band buckle |
| 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 |
| CN111477358A (en) * | 2020-05-25 | 2020-07-31 | 中国原子能科学研究院 | Strip grid cell combined positioning grid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115171923B (en) | 2024-06-07 |
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