CN111540482A - Single metal structure grillwork with two Y shape springs - Google Patents
Single metal structure grillwork with two Y shape springs Download PDFInfo
- Publication number
- CN111540482A CN111540482A CN202010407150.XA CN202010407150A CN111540482A CN 111540482 A CN111540482 A CN 111540482A CN 202010407150 A CN202010407150 A CN 202010407150A CN 111540482 A CN111540482 A CN 111540482A
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- China
- Prior art keywords
- strips
- springs
- single metal
- double
- square grid
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Classifications
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- 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
- G21C3/352—Spacer grids formed of assembled intersecting strips
-
- 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
Abstract
The invention discloses a single metal structure grillage with double Y-shaped springs, which comprises a plurality of strips A and a plurality of strips B, wherein a plurality of springs are arranged on one side wall of each of the strips A and the strips B, a plurality of rigid bulges are arranged on the other side wall of each of the strips A and the strips B, a plurality of assembling grooves are arranged on each of the strips A and the strips B in the vertical direction, the opening directions of the assembling grooves arranged on the strips A and the assembling grooves arranged on the strips B are opposite, a plurality of strips A and a plurality of strips B are mutually matched and inserted through the assembling grooves to form a square grid element array, in the square grid cell array, the square grid cell array comprises a plurality of square grid cells, each square grid cell comprises 2 springs and 4 rigid protrusions, the springs are formed by two oppositely-facing Y-shaped structures through stamping, and the surfaces of the springs and the rigid protrusions, which are in contact with the fuel rods, are flat surfaces. The invention solves the problem that the abrasion between the grids and the fuel rods cannot be effectively relieved by the existing single-metal grids.
Description
Technical Field
The invention relates to the technical field of nuclear reactors, in particular to a single metal structure grillwork with double Y-shaped springs.
Background
A common fuel assembly for pressurized water reactor nuclear power plants consists of a fuel skeleton and a number of fuel rods. The fuel skeleton consists of several guide tubes, instrument tubes, several lattice frames and upper and lower tube seats, the lattice frames are welded to the guide tubes and the instrument tubes, and the fuel rods are clamped by the lattice frames. The structural grids serve as important components of the fuel assembly and their primary function is to maintain the transverse spacing of the fuel rods from each other and the axial spacing from the upper and lower headers.
Unlike bimetallic grids, single metal grid springs are stamped and formed directly from the grid straps. The single metal grids are severely loosened by irradiation, and after one fuel cycle, the grid clamping force may be reduced to zero. Insufficient clamping force exacerbates the problem of erosion between the grids and the fuel rods caused by flow induced vibration. It is generally believed that reducing the cross flow within the fuel assembly, thereby reducing flow-induced vibration of the fuel rods, and increasing the contact area of the fuel rods with the grids, mitigates fretting between the grids and the fuel rods.
The existing single metal grids mainly comprise H-shaped grids and I-shaped grids of American Combustion engineering company, inclined spring grids of American West House company, OPT-H-shaped grids of Korean atomic force research institute, canoe-shaped spring grids of Korean atomic force Fuel company, and fuel rod scratch and vibration abrasion prevention grids of China Shanghai nuclear engineering research design institute.
The transverse flow areas of the H-shaped grillwork and the I-shaped grillwork are larger, so that the transverse flow of the fluid is increased to a certain extent; the inclined spring grids close the water flowing holes on the strips in order to reduce the transverse flow area, but the contact area of the inclined spring grids and the fuel rods is smaller; the OPT-H type grid has a larger transverse flow area, and although the contact area is increased by adopting a surface contact method between the fuel rod and the grid, the manufacturing error makes the fuel rod difficult to form theoretical surface contact with the grid; the curved surface connecting parts and the supporting leg connecting parts at the two ends of the rowing boat-shaped spring grid spring are not in contact with the fuel rods, the effective length of the spring is not fully utilized, and the contact area between the fuel rods and the grid is substantially shortened; the grid springs are bent in the flow direction to reduce the contact area between the fuel rods and the grid, and the effect of preventing the fuel rods from vibrating and abrading may not be obvious.
Disclosure of Invention
The invention aims to provide a single metal structure grid with double Y-shaped springs, and solves the problem that the abrasion between the grid and a fuel rod cannot be effectively relieved by the conventional single metal grid.
The invention is realized by the following technical scheme:
a single metal structure grillage with double Y-shaped springs comprises a plurality of strips A and a plurality of strips B, wherein a plurality of springs are arranged on one side wall of each of the strips A and the strips B, the springs are uniformly arranged in rows, a plurality of rigid protrusions are arranged on the other side wall of each of the strips A and the strips B, the rigid protrusions are arranged in an upper row and a lower row, the rigid protrusions in the two rows are respectively arranged above and below the springs, a plurality of assembling grooves are arranged on each of the strips A and the strips B in the vertical direction, the opening directions of the assembling grooves arranged on the strips A and the assembling grooves arranged on the strips B are opposite, the strips A and the strips B are mutually inserted through the assembling grooves to form a square grid cell array, the strips A are arranged in parallel in the square grid cell array, the square grid cell array comprises a plurality of square grid cells, every square grid cell is used for inserting a fuel rod, and every square grid cell includes 2 springs and 4 just protruding, spring and just protruding setting are on banding A and banding B through horizontal punching press mode, wherein, the spring is formed through the punching press by two Y shape structures that back to each other, and two Y shape structures that back to each other are setting from top to bottom, the face that spring and just protruding and fuel rod contact is the plane.
According to the invention, one square grid cell is a clamping system to realize clamping and positioning of the fuel rod, the clamping system comprises 2 springs and 4 rigid protrusions, when the fuel rod is clamped, the 2 springs and the 4 rigid protrusions are in line contact with the fuel rod, and as the surfaces of the springs and the rigid protrusions in contact with the fuel rod are planes, namely the springs and the rigid protrusions are not bent in the flow direction of the coolant, and other transverse flow areas except the springs, the rigid protrusions and the assembly grooves in the direction perpendicular to the strips are not provided; the spring is formed by stamping from two oppositely facing Y-shaped structures, so that the spring makes long line contact with the fuel rod.
In conclusion, no other flow blockage exists except the cross section of the strip in the flow direction of the coolant, and the spring and the rigid protrusion are horizontally stamped, so that the flow blockage area in the flow direction of the coolant is reduced, and the pressure drop of the grid is reduced; the invention reduces the transverse flow area of the coolant in the grid, thereby reducing the flow-induced vibration of the fuel rods, further relieving the abrasion between the grid and the fuel rods, and reduces the abrasion depth corresponding to the same abrasion volume by arranging the spring and the rigid protrusion on the strip, wherein the rigid protrusion is arranged on two sides of the spring, the spring is formed by stamping two back-to-back Y-shaped structures, and the abrasion between the grid and the fuel rods is relieved by increasing the contact length of the grid and the fuel rods.
Further, the strip A and the strip B are provided with wide grooves communicated with the assembling grooves, and the width of each wide groove is larger than that of each assembling groove.
Because the width of the wide groove is larger than that of the assembling groove, a certain gap is formed at the wide groove after the strip A and the strip B are assembled and inserted, when the spring stiffness is high, the spring pressure can be released to the strip through the wide groove on the strip, and therefore the possibility of fatigue fracture of the spring is reduced.
Furthermore, the width of the wide groove is 1 mm-1.5 mm, and the length of the wide groove is 9 mm-14 mm.
Further, the spring includes the fuel rod contact surface, the fuel rod contact surface is parallel with coolant flow direction, the both ends symmetry of fuel rod contact surface on vertical direction is provided with 2Y feet.
The above arrangement further ensures that the spring is in long line contact with the fuel rod.
Furthermore, the contact surface of the Y-shaped pin and the fuel rod is in smooth transition.
Furthermore, the width of the Y foot is 10 mm-15 mm, and the angle of the Y foot is 30-60 degrees.
Further, the middle portion of the rigid projection projects upward and downward to the both sides so that the rigid projection has a structure with a large middle and small ends in the horizontal direction.
Above-mentioned setting can increase and just protruding fuel rod's contact length, further improves the area of contact of clamping system and fuel rod, and further, be the slope transition between just protruding middle part bulge and the just protruding body.
Further, the two ends of the strip A and the strip B are inserted to form welding spots through spot welding.
The stability of forming a square grid cell array by mutually matching and inserting a plurality of strips A and a plurality of strips B through assembling grooves is improved.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the vertical strips of the invention have no other transverse flow areas except for the springs, the rigid convex open slots and the assembly slots, thereby reducing flow-induced vibration caused by transverse flow and further relieving abrasion of the grids and the fuel rods.
2. The spring and the rigid bulge are horizontally stamped, so that the flow blocking area in the flowing direction of the coolant is reduced, and the pressure drop of the grid is reduced.
2. According to the invention, by arranging the wide groove, when the rigidity of the spring is high, the stress on the spring is released to the strip by forming the wide groove on the strip, so that the possibility of fatigue fracture of the spring is reduced.
3. The double Y-shaped springs are in long-line contact with the fuel rods, and the rigid protrusions protrude towards two sides at the center position to increase the contact length with the fuel rods; by increasing the contact length of the grids and the fuel rods, the abrasion depth corresponding to the same abrasion volume is reduced, and the abrasion between the grids and the fuel rods is relieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of a fuel assembly;
FIG. 2 is a schematic illustration of a fuel rod, guide tube and instrumentation tube arrangement within a fuel assembly;
figure 3 is a schematic view of a portion of a structural lattice according to the invention;
FIG. 4 is a schematic view of strip A;
FIG. 5 is a schematic view of strip B;
FIG. 6 is a schematic illustration of a strip insertion and spot welding;
FIG. 7 is a schematic diagram of a square cell;
FIG. 8 is a schematic view of a unit strip;
FIG. 9 is a top view of a unit strip;
FIG. 10 is a side view of a unit strap.
Reference numbers and corresponding part names in the drawings:
1-upper tube seat; 2-instrument tube; 3-fuel rods; 4-structural grillwork; 5, a guide pipe; 6-lower tube seat; 7-lane A; 8-lane B; 9-a spring; 10-rigid convex; 11-an assembly groove; 12-wide groove; 13-welding spot; 14-a unit strip; 15-fuel rod contact surface; 16-Y foot.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1-10, a single metal structure lattice with double Y-shaped springs comprises a plurality of strips a7 and a plurality of strips B8, a plurality of springs 9 are arranged on one side wall of each of the strips a7 and B8, a plurality of springs 9 are uniformly arranged in rows, a plurality of rigid protrusions 10 are arranged on the other side wall of each of the strips a7 and B8, a plurality of rigid protrusions 10 are arranged in an upper row and a lower row, two rows of rigid protrusions 10 are symmetrically arranged above and below the springs 9, the springs 9 and the rigid protrusions 10 in the same vertical direction form 1 unit strip 14, a plurality of assembly slots 11 are arranged in the vertical direction on each of the strips a7 and B8, openings of the assembly slots 11 arranged on the strips a7 face downwards, openings of the assembly slots 11 arranged on the strips B8 face upwards, a plurality of strips a7 and a plurality of strips B8 are mutually inserted through the assembly slots 11 to form a square grid array, the width of the assembly groove 11 is matched with the thickness of a strip A7 or a strip B8, the assembly groove 11 corresponds to springs 9 one by one, a plurality of assembly grooves 11 are arranged at equal intervals, a plurality of springs 9 are arranged at equal intervals, a plurality of rigid protrusions 10 are arranged at equal intervals, welding spots 13 are formed at two ends of a strip A7 and a strip B8 which are inserted in a matched mode through spot welding, in a square grid cell array, a plurality of strips A7 are arranged in parallel, a plurality of strips B8 are arranged in parallel, namely the orientations of the springs 9 or the rigid protrusions 10 on a plurality of strips A7 or a plurality of strips B8 are consistent, the square grid cell array comprises a plurality of square grid cells, each square grid cell is composed of 4 unit strips 14, each square grid cell is used for inserting one fuel rod 3, each square grid cell comprises 2 springs 9 and 4 rigid protrusions 10, each spring 9 and 2 rigid protrusions 10 are arranged oppositely, the springs 9 and the rigid protrusions 10 in the square grid cells form six-line contact with the fuel rod 3, spring 9 and just protruding 10 set up on banding A7 and banding B8 through the punching press mode, wherein, spring 9 is formed through the horizontal punching press by two Y shape structures that back to back, and two Y shape structures that back to back are setting from top to bottom, specifically, spring 9 includes fuel rod contact surface 15, fuel rod contact surface 15 is parallel with coolant flow direction, fuel rod contact surface 15 is provided with 2Y feet 16 at the ascending both ends symmetry of vertical direction, the face that spring 9 and just protruding 10 contacted with fuel rod 3 is the plane.
Example 2:
the embodiment is based on embodiment 1, the strip A7 and the strip B8 are provided with wide grooves 12 communicated with the assembly grooves 11, and the width of the wide grooves 12 is larger than that of the assembly grooves 11; the width of the wide groove 12 is 1 mm-1.5 mm, and the length of the wide groove 12 is 9 mm-14 mm.
Example 3:
the embodiment is based on the embodiment 1, the Y foot 16 is in smooth transition with the contact surface 15 of the fuel rod; the width of the Y foot 16 is 10 mm-15 mm, and the angle of the Y foot 16 is 30-60 degrees.
Example 4:
the embodiment is based on embodiment 1, the middle part of the rigid projection 10 protrudes upwards and downwards, so that the structure of the rigid projection 10 in the horizontal direction is a structure with a large middle and two small ends, and is similar to a bridge-shaped structure; the middle convex part of the rigid convex 10 and the body of the rigid convex 10 are in inclined transition.
The utility model provides a pressurized water reactor fuel assembly, pressurized water reactor fuel assembly includes 254 fuel rod 3, 24 stand pipes 5 and 1 instrument pipe 2 and a plurality of structural grid 4, and 254 fuel rod 3, 24 stand pipes 5 and 1 instrument pipe 2 are according to the matrix arrangement, and a plurality of structural grid 4 are fixed through stand pipe 5 in vertical direction, and fuel rod 3 carries out the centre gripping through the square grid cell in structural grid 4, the both ends of stand pipe 5 are provided with upper tube seat 1 and lower tube seat 6 respectively.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A single metal structure grillage with double Y-shaped springs is characterized by comprising a plurality of strips A (7) and a plurality of strips B (8), wherein a plurality of springs (9) are arranged on one side wall of each of the strips A (7) and the strips B (8), the springs (9) are uniformly arranged in rows, a plurality of rigid protrusions (10) are arranged on the other side wall of each of the strips A (7) and the strips B (8), the rigid protrusions (10) are arranged in an upper row and a lower row, the rigid protrusions (10) in the two rows are respectively arranged above and below the springs (9), a plurality of assembling grooves (11) are respectively arranged on each of the strips A (7) and the strips B (8) in the vertical direction, the assembling grooves (11) arranged on the strips A (7) are opposite to the opening directions of the assembling grooves (11) arranged on the strips B (8), and the strips A (7) and the strips B (8) are mutually matched through the assembling grooves (11) to form a square grid cell array, in square grid cell array, a plurality of bands A (7) parallel arrangement, a plurality of bands B (8) parallel arrangement, square grid cell array includes a plurality of square grid cells, and every square grid cell is used for inserting a fuel rod (3), and every square grid cell includes 2 spring (9) and 4 just protruding (10), spring (9) and just protruding (10) set up on band A (7) and band B (8) through horizontal punching press mode, wherein, spring (9) are formed through the punching press by two Y shape structure that back to back, and two Y shape structures that back to back are setting up from top to bottom, the face that spring (9) and just protruding (10) contacted with fuel rod (3) is the plane.
2. The single metal structural lattice with double Y-springs as claimed in claim 1, wherein the straps a (7) and B (8) are provided with wide grooves (12) communicating with the fitting grooves (11), the wide grooves (12) having a width greater than that of the fitting grooves (11).
3. The single metal structural lattice with double Y-springs as claimed in claim 2, wherein the width of the wide slots (12) is 1mm to 1.5mm, and the length of the wide slots (12) is 9mm to 14 mm.
4. A single metal structural grid with double Y-shaped springs as claimed in claim 1, characterized in that the springs (9) comprise fuel rod contact surfaces (15), the fuel rod contact surfaces (15) being parallel to the coolant flow direction, the fuel rod contact surfaces (15) being provided with 2Y-feet (16) symmetrically at both ends in the vertical direction.
5. Single metal structural grid with double Y-shaped springs according to claim 4, characterized in that the Y-legs (16) are rounded off the fuel rod contact surface (15).
6. The single metal structure lattice with double Y-shaped springs as claimed in claim 4, wherein the width of the Y-legs (16) is 10mm to 15mm, and the angle of the Y-legs (16) is 30 ° to 60 °.
7. The single metal structure lattice with double Y-shaped springs as claimed in claim 1, wherein the middle of the rigid protrusion (10) protrudes to the upper and lower sides so that the structure of the rigid protrusion (10) in the horizontal direction is a structure with a large middle and small ends.
8. Single metal structural lattice with double Y-springs according to claim 7, characterized in that there is an oblique transition between the central convex part of the rigid convex (10) and the rigid convex (10) body.
9. Single metal structural lattice with double Y-shaped springs according to claim 1, characterized in that the two ends of the strip A (7) and the strip B (8) which are inserted are spot welded to form a weld (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010407150.XA CN111540482A (en) | 2020-05-14 | 2020-05-14 | Single metal structure grillwork with two Y shape springs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010407150.XA CN111540482A (en) | 2020-05-14 | 2020-05-14 | Single metal structure grillwork with two Y shape springs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111540482A true CN111540482A (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010407150.XA Pending CN111540482A (en) | 2020-05-14 | 2020-05-14 | Single metal structure grillwork with two Y shape springs |
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| CN (1) | CN111540482A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112820429A (en) * | 2020-11-27 | 2021-05-18 | 中核北方核燃料元件有限公司 | Tool and method for detecting looseness of fuel element grid strap buckle |
| CN113362973A (en) * | 2021-06-04 | 2021-09-07 | 中国核动力研究设计院 | Grid spring for improving abrasion resistance and reducing resistance and positioning grid |
| CN114220559A (en) * | 2021-11-18 | 2022-03-22 | 中国核动力研究设计院 | Single metal positioning grid frame for reducing damage and pressure loss of fuel rod position |
| CN115188501A (en) * | 2022-07-07 | 2022-10-14 | 中国核动力研究设计院 | Fuel rod clamping structure and positioning grid |
| WO2023087898A1 (en) * | 2021-11-18 | 2023-05-25 | 中国核动力研究设计院 | Fuel assembly grid, fuel assembly, and pressurized water reactor core |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172974A (en) * | 1991-12-20 | 1993-07-13 | Mitsubishi Heavy Ind Ltd | Support grid for reactor fuel assembly |
| CN1340199A (en) * | 1999-02-15 | 2002-03-13 | 法玛通公司 | Method for making thin zirconium alloy elements and wafers obtained |
| US20040196953A1 (en) * | 2001-12-26 | 2004-10-07 | Kim Dae Ho | Lips-type multi-purposed nuclear fuel assembly spacer grid |
| US20070211843A1 (en) * | 2006-03-09 | 2007-09-13 | Westinghouse Electric Co. Llc | Spacer grid with mixing vanes and nuclear fuel assembly employing the same |
| KR20080060801A (en) * | 2006-12-27 | 2008-07-02 | 한전원자력연료 주식회사 | Improved fretting wear resistance spacer grid with w-type and m-type spring |
| CN101377964A (en) * | 2007-08-27 | 2009-03-04 | 韩电原子力燃料株式会社 | Support grillwork with rowboat-shaped spring for preventing frottage of fuel rod |
| KR20090021469A (en) * | 2007-08-27 | 2009-03-04 | 한전원자력연료 주식회사 | Stable support and anti-fretting wear spacer grid with double wing shape spring |
| CN101770820A (en) * | 2008-12-26 | 2010-07-07 | 韩电原子力燃料株式会社 | Debris filtering bottom spacer grid with louvers for preventing uplift of fuel rods |
| 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 |
| CN106997786A (en) * | 2017-02-28 | 2017-08-01 | 上海核工程研究设计院 | A kind of enhancing anti-erosion performance grid with polyteny support spring |
| CN107221358A (en) * | 2017-06-09 | 2017-09-29 | 中广核研究院有限公司 | A kind of nuclear fuel assembly, location grid and spring |
| CN107230501A (en) * | 2017-06-09 | 2017-10-03 | 中广核研究院有限公司 | A kind of nuclear fuel assembly, location grid and band |
| CN206619399U (en) * | 2017-02-28 | 2017-11-07 | 上海核工程研究设计院 | A kind of rigid support grid for fuel assembly bottom foreign body filtering |
-
2020
- 2020-05-14 CN CN202010407150.XA patent/CN111540482A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172974A (en) * | 1991-12-20 | 1993-07-13 | Mitsubishi Heavy Ind Ltd | Support grid for reactor fuel assembly |
| CN1340199A (en) * | 1999-02-15 | 2002-03-13 | 法玛通公司 | Method for making thin zirconium alloy elements and wafers obtained |
| US20040196953A1 (en) * | 2001-12-26 | 2004-10-07 | Kim Dae Ho | Lips-type multi-purposed nuclear fuel assembly spacer grid |
| US20070211843A1 (en) * | 2006-03-09 | 2007-09-13 | Westinghouse Electric Co. Llc | Spacer grid with mixing vanes and nuclear fuel assembly employing the same |
| KR20080060801A (en) * | 2006-12-27 | 2008-07-02 | 한전원자력연료 주식회사 | Improved fretting wear resistance spacer grid with w-type and m-type spring |
| KR20090021469A (en) * | 2007-08-27 | 2009-03-04 | 한전원자력연료 주식회사 | Stable support and anti-fretting wear spacer grid with double wing shape spring |
| CN101377964A (en) * | 2007-08-27 | 2009-03-04 | 韩电原子力燃料株式会社 | Support grillwork with rowboat-shaped spring for preventing frottage of fuel rod |
| CN101770820A (en) * | 2008-12-26 | 2010-07-07 | 韩电原子力燃料株式会社 | Debris filtering bottom spacer grid with louvers for preventing uplift of fuel rods |
| 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 |
| CN106997786A (en) * | 2017-02-28 | 2017-08-01 | 上海核工程研究设计院 | A kind of enhancing anti-erosion performance grid with polyteny support spring |
| CN206619399U (en) * | 2017-02-28 | 2017-11-07 | 上海核工程研究设计院 | A kind of rigid support grid for fuel assembly bottom foreign body filtering |
| CN107221358A (en) * | 2017-06-09 | 2017-09-29 | 中广核研究院有限公司 | A kind of nuclear fuel assembly, location grid and spring |
| CN107230501A (en) * | 2017-06-09 | 2017-10-03 | 中广核研究院有限公司 | A kind of nuclear fuel assembly, location grid and band |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112820429A (en) * | 2020-11-27 | 2021-05-18 | 中核北方核燃料元件有限公司 | Tool and method for detecting looseness of fuel element grid strap buckle |
| CN113362973A (en) * | 2021-06-04 | 2021-09-07 | 中国核动力研究设计院 | Grid spring for improving abrasion resistance and reducing resistance and positioning grid |
| CN113362973B (en) * | 2021-06-04 | 2022-02-22 | 中国核动力研究设计院 | Grid spring for improving abrasion resistance and reducing resistance and positioning grid |
| CN114220559A (en) * | 2021-11-18 | 2022-03-22 | 中国核动力研究设计院 | Single metal positioning grid frame for reducing damage and pressure loss of fuel rod position |
| WO2023087898A1 (en) * | 2021-11-18 | 2023-05-25 | 中国核动力研究设计院 | Fuel assembly grid, fuel assembly, and pressurized water reactor core |
| CN115188501A (en) * | 2022-07-07 | 2022-10-14 | 中国核动力研究设计院 | Fuel rod clamping structure and positioning grid |
| CN115188501B (en) * | 2022-07-07 | 2024-02-06 | 中国核动力研究设计院 | Fuel rod clamping structure and positioning grid |
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Application publication date: 20200814 |