CN103021477B - Lower pipe base of reactor fuel assembly - Google Patents
Lower pipe base of reactor fuel assembly Download PDFInfo
- Publication number
- CN103021477B CN103021477B CN201210483914.9A CN201210483914A CN103021477B CN 103021477 B CN103021477 B CN 103021477B CN 201210483914 A CN201210483914 A CN 201210483914A CN 103021477 B CN103021477 B CN 103021477B
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- Prior art keywords
- knee
- piece
- connection block
- filter plate
- quadra
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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
Abstract
The invention discloses a lower pipe base of a reactor fuel assembly. The lower pipe base comprises a pipe base substrate and a curved piece filter plate fixed on the pipe base substrate, wherein the pipe base substrate comprises a square frame, and the curved piece filter plate is positioned in the square frame of the pipe substrate and comprises multiple strip-shaped curved pieces side by side; the two long edges of each strip-shaped curved piece respectively form a straight edge and a wavy curved edge, and a smooth transition curved surface is formed between each straight edge and each wavy curved edge of each strip-shaped curved piece; and the straight edges of any two adjacent strip-shaped curved pieces in the curved piece filter plate are respectively positioned on the upper and lower end faces of the curved piece filter plate, and multiple gap passageways are formed between any two adjacent strip-shaped curved pieces in the curved piece filter plate. The lower pipe base provided by the invention has the advantages that the integral structure is simple, and the structural strength is high; and when the lower pipe base is put into use, a coolant mainly flows from the gap passageways, and under the blocking of the strip-shaped curved pieces, foreign materials in the coolant are filtered, the flow speed of the coolant is lowered, and further the foreign materials in the coolant are prevented from damaging a fuel rod.
Description
Technical field
The present invention relates to nuclear reactor, specifically the bottom nozzle of reactor fuel assemblies.
Background technology
Reactor fuel assemblies comprises skeleton and fuel rod, wherein, skeleton is primarily of upper base, screen work, gauge pipe, guide pipe and bottom nozzle composition, and fuel rod is connected on screen work, during reactor operation, cooling medium is flowed into by bottom nozzle, and flows out from upper base after fuel rod.Bottom nozzle is the lower structural features of reactor fuel assemblies, its function playing supporting, location at fuel assembly and distribute cooling medium.During existing reactor operation, cooling medium flows through fuel assembly with very fast speed, and the foreign matter contained in cooling medium can cause damage to fuel rod, and fuel rod needs frequent replacing, this adds increased the use cost of fuel assembly.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of foreign matter that can not only filter in cooling medium, and the bottom nozzle of reactor fuel assemblies of coolant flow speed can be reduced.
Object of the present invention is achieved through the following technical solutions: the bottom nozzle of reactor fuel assemblies, comprise base matrix and be fixed on the knee-piece filter plate on base matrix, described base matrix comprises quadra, described knee-piece filter plate is positioned at the quadra of base matrix, knee-piece filter plate comprises polylith bar shaped knee-piece, two long limits of described bar shaped knee-piece form straight flange and wavy bent limit respectively, smooth excessive curved surface is formed between the straight flange of bar shaped knee-piece and wavy bent limit, in knee-piece filter plate, polylith bar shaped knee-piece is arranged side by side, the straight flange of one or two adjacent bar shaped knee-piece is appointed to lay respectively at the upper and lower end face of knee-piece filter plate in knee-piece filter plate, and be configured with multiple spaces runner between one or two adjacent bar shaped knee-piece in knee-piece filter plate.The present invention is when applying, and straight flange can be identical with the thickness on wavy bent limit, also can be different, but should ensure that in the quantity of space runner and fuel assembly, a quantity of arranging fuel rod adapts; Because appointing the straight flange of one or two adjacent bar shaped knee-piece to lay respectively at the upper and lower end face of knee-piece filter plate in knee-piece filter plate, therefore knee-piece filter plate is formed by connecting by a series of positive and negative staggered bar shaped knee-piece.
Described base matrix comprises multiple Connection Block be arranged in its quadra, the arrangement of multiple Connection Block entirety forms rectangular Connection Block group, between Connection Block adjacent in Connection Block group and the peripheral Connection Block of Connection Block group be all connected by rib with between quadra, described knee-piece filter plate embeds the gap between Connection Block by its bar shaped knee-piece and the gap between Connection Block and quadra is fixed on base matrix.
Described rib comprises upper strata rib and lower floor's rib, in Connection Block group, every horizontally-arranged two adjacent Connection Blocks are connected to two Connection Block sidewall upper by two ends and the upper strata rib connection of horizontally set, two Connection Blocks at every horizontally-arranged two ends are all connected to Connection Block sidewall upper by two ends and are connected with the upper strata rib of quadra inwall upper end, two Connection Blocks that in Connection Block group, every tandem is adjacent are connected to two Connection Block side wall lower ends by two ends and the lower floor's rib longitudinally arranged connects, two Connection Blocks at every tandem two ends are all connected to Connection Block side wall lower ends by two ends and are connected with lower floor's rib of quadra inwall lower end, the quantity of described knee-piece filter plate is two pieces, in one piece of knee-piece filter plate inner stripe knee-piece horizontally set and the gap embedded between adjacent two horizontally-arranged Connection Blocks and the lateral clearance between horizontally-arranged Connection Block and quadra, another block knee-piece filter plate inner stripe knee-piece is longitudinally arranged and in the gap embedded between adjacent two tandem Connection Blocks and the axial clearance between tandem Connection Block and quadra.
The angle that between the Connection Block center of described Connection Block group corner and two Connection Block centers of its two neighbour, line is formed is not less than 90 °.The Connection Block of Connection Block group corner is not arranged on the right angle corner point of specifying by the present invention, but closer to Connection Block group switching centre, so, knee-piece filter plate embed Connection Block group and quadra time more can be level and smooth excessive, when this ensures that knee-piece filter plate is arranged on base matrix further, structure is firm.
The wavy Qu Bianwei of described bar shaped knee-piece is the repeatedly bent limit that forms of bending to both sides immediately below straight flange.Wavy bent limit is set to two lateral bends by the present invention, polylith bar shaped knee-piece so can be made to be crisscross arranged form more compact structure after knee-piece filter plate.
For the ease of of the present invention fixing, described base matrix also comprises four supporting legs being connected to lower end, quadra four right angle corner places.
Supporting leg of the present invention and quadra both can independently exist, then were connected by the mode of welding, and accessible site is integrated again, and as preferably, described supporting leg and quadra become one.
Compared with prior art, the present invention has following beneficial effect: (1) the present invention includes base matrix and knee-piece filter plate, wherein, knee-piece filter plate comprises the bar shaped knee-piece that polylith is arranged side by side, two long limits of bar shaped knee-piece form straight flange and wavy bent limit respectively, smooth excessive curved surface is formed between the straight flange of bar shaped knee-piece and wavy bent limit, the straight flange of one or two adjacent bar shaped knee-piece is appointed to lay respectively at the upper and lower end face of knee-piece filter plate in knee-piece filter plate, appoint in knee-piece filter plate between one or two adjacent bar shaped knee-piece and be configured with multiple spaces runner, one-piece construction of the present invention is simple, compact, mainly flow through from space runner when cooling medium flows through of the present invention, under the barrier effect of bar shaped knee-piece, the flow velocity of cooling medium reduces, foreign matter in cooling medium is then stopped by bar shaped knee-piece and not by space runner, and then the foreign matter in cooling medium can be avoided to cause damage to fuel rod.
(2) base matrix of the present invention comprises multiple Connection Block, multiple Connection Block forms Connection Block group by matrix distribution, Connection Block in Connection Block group is connected by upper and lower two-layer rib, by the connection function of upper and lower two-layer rib, further ensure the structural strength of base matrix, and the fixation of base matrix to knee-piece filter plate can be strengthened.
(3) quantity of the knee-piece filter plate of the present invention's setting is two pieces, in one piece of knee-piece filter plate inner stripe knee-piece horizontally set and the gap embedded between adjacent two horizontally-arranged Connection Blocks and the lateral clearance between horizontally-arranged Connection Block and quadra, another block knee-piece filter plate inner stripe knee-piece is longitudinally arranged and in the gap embedded between adjacent two tandem Connection Blocks and the axial clearance between tandem Connection Block and quadra, the present invention, by the knee-piece filter-plate structure of upper and lower two-layer mutual combination in 90 °, further can improve the effect of filtration capacity and reduction coolant flow speed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the structural representation of base matrix in Fig. 1;
Fig. 3 is the structural representation of bar shaped knee-piece in knee-piece filter plate;
Fig. 4 is the structural representation not cutting knee-piece filter plate;
Fig. 5 is the structure for amplifying schematic diagram at A place in Fig. 4.
Name in accompanying drawing corresponding to Reference numeral is called: 1, supporting leg, 2, shirt rim, 3, Connection Block, 4, upper strata rib, 5, lower floor's rib, 6, bar shaped knee-piece, 601, straight flange, 602, Qu Bian, 7, space runner.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment:
As shown in Fig. 1 ~ Fig. 5, the bottom nozzle of reactor fuel assemblies, comprise base matrix and knee-piece filter plate, wherein, base matrix comprises quadra, supporting leg 1, Connection Block 3 and rib, and Connection Block 3 forms cylindrical shape, and quadra is made up of four shirt rims 2, the quantity of supporting leg 1 is four, and four supporting legs 1 are connected to lower end, quadra four right angle corner places.As preferably, the quadra of base matrix, supporting leg 1, Connection Block 3 and rib become one.
Knee-piece filter plate is positioned at the quadra of base matrix, knee-piece filter plate comprises polylith bar shaped knee-piece 6, two long limits of bar shaped knee-piece 6 form straight flange 601 and wavy bent limit 602 respectively, the smooth excessive curved surface of evagination is formed between the straight flange 601 of bar shaped knee-piece 6 and wavy bent limit 602, wherein, the wavy bent limit 602 of bar shaped knee-piece 6 be immediately below straight flange 601 both sides repeatedly bending form bent limit.In knee-piece filter plate, polylith bar shaped knee-piece 6 is arranged side by side, and appoints the straight flange 601 of one or two adjacent bar shaped knee-piece 6 to lay respectively at the upper and lower end face of knee-piece filter plate in knee-piece filter plate, and namely knee-piece filter plate is crisscross arranged at the straight flange of the bar shaped knee-piece of upper surface or lower surface.The bar shaped knee-piece 6 that in knee-piece filter plate, bar shaped knee-piece 6 is arranged side by side phase neighbour is together close together, and because of the effect of the excessive curved surface of bar shaped knee-piece 6 Smooth, appoints between one or two adjacent bar shaped knee-piece 6 and be configured with multiple spaces runner 7 in knee-piece filter plate.
The quantity of the Connection Block 3 of base matrix is multiple, multiple Connection Block 3 is all arranged in quadra, the arrangement of multiple Connection Block 3 entirety forms rectangular Connection Block group, but the Connection Block group that the present embodiment Connection Block 3 is formed is also irregular rectangular, the Connection Block 3 of Connection Block group corner is drawn close to the center of Connection Block group, and the angle that namely between Connection Block 3 center of Connection Block group corner and two Connection Block 3 centers of its two neighbour, line is formed is not less than 90 °.For the ease of the connection of base matrix, the Connection Block 3 of Connection Block group switching centre can be provided with threaded hole.
Between Connection Block 3 adjacent in Connection Block group and the peripheral Connection Block 3 of Connection Block group be all connected by rib with between quadra, knee-piece filter plate embeds the gap between Connection Block 3 and the gap between Connection Block 3 and quadra by its bar shaped knee-piece 6 and is fixed on base matrix.Rib comprises upper strata rib 4 and lower floor's rib 5, in Connection Block group, every horizontally-arranged two adjacent Connection Blocks 3 are connected to two Connection Block 3 sidewall upper by two ends and the upper strata rib 4 of horizontally set connects, two Connection Blocks 3 at every horizontally-arranged two ends are all connected to Connection Block 3 sidewall upper by two ends and are connected with the upper strata rib 4 of quadra inwall upper end, two Connection Blocks 3 that in Connection Block group, every tandem is adjacent are connected to two Connection Block 3 side wall lower ends by two ends and the lower floor's rib 5 longitudinally arranged connects, two Connection Blocks 3 at every tandem two ends are all connected to Connection Block 3 side wall lower ends by two ends and are connected with lower floor's rib 5 of quadra inwall lower end.As preferably, in the present embodiment, the quantity of knee-piece filter plate is two pieces, in one piece of knee-piece filter plate inner stripe knee-piece 6 horizontally set and the gap embedded between adjacent two horizontally-arranged Connection Blocks 3 and the lateral clearance between horizontally-arranged Connection Block 3 and quadra, another block knee-piece filter plate inner stripe knee-piece 6 is longitudinally arranged and in the gap embedded between adjacent two tandem Connection Blocks 3 and the axial clearance between tandem Connection Block 3 and quadra.Wherein, the knee-piece filter plate embedded in the gap between adjacent two horizontally-arranged Connection Blocks 3 and the lateral clearance between horizontally-arranged Connection Block 3 and quadra is undertaken supporting and lower limit by lower floor's rib 5, and the knee-piece filter plate embedded in the gap between adjacent two tandem Connection Blocks 3 and the axial clearance between tandem Connection Block 3 and quadra carries out upper limit by upper strata rib 4.
Bar shaped knee-piece 6 should be arranged side by side by the present embodiment during fabrication in advance, and then cuts accordingly according to the position of base matrix upper connecting base 3 and rib, is finally embedded on base matrix by knee-piece filter plate again.
As mentioned above, then well the present invention can be realized.
Claims (7)
1. the bottom nozzle of reactor fuel assemblies, it is characterized in that: comprise base matrix and be fixed on the knee-piece filter plate on base matrix, described base matrix comprises quadra, described knee-piece filter plate is positioned at the quadra of base matrix, knee-piece filter plate comprises polylith bar shaped knee-piece (6), two long limits of described bar shaped knee-piece (6) form straight flange (601) and wavy bent limit (602) respectively, smooth excessive curved surface is formed between the straight flange (601) of bar shaped knee-piece (6) and wavy bent limit (602), in knee-piece filter plate, polylith bar shaped knee-piece (6) is arranged side by side, the straight flange (601) of one or two adjacent bar shaped knee-piece (6) is appointed to lay respectively at the upper and lower end face of knee-piece filter plate in knee-piece filter plate, and be configured with multiple spaces runner (7) between one or two adjacent bar shaped knee-piece (6) in knee-piece filter plate.
2. the bottom nozzle of reactor fuel assemblies according to claim 1, it is characterized in that: described base matrix comprises multiple Connection Block (3) be arranged in its quadra, the arrangement of multiple Connection Block (3) entirety forms rectangular Connection Block group, between Connection Block (3) adjacent in Connection Block group and the peripheral Connection Block (3) of Connection Block group be all connected by rib with between quadra, described knee-piece filter plate embeds the gap between Connection Block (3) by its bar shaped knee-piece (6) and the gap between Connection Block (3) and quadra is fixed on base matrix.
3. the bottom nozzle of reactor fuel assemblies according to claim 2, it is characterized in that: described rib comprises upper strata rib (4) and lower floor's rib (5), in Connection Block group, every horizontally-arranged two adjacent Connection Blocks (3) are connected to two Connection Block (3) sidewall upper by two ends and the connection of the upper strata rib (4) of horizontally set, two Connection Blocks (3) at every horizontally-arranged two ends are all connected to Connection Block (3) sidewall upper by two ends and are connected with the upper strata rib (4) of quadra inwall upper end, two Connection Blocks (3) that in Connection Block group, every tandem is adjacent are connected to two Connection Block (3) side wall lower ends by two ends and the lower floor's rib (5) longitudinally arranged connects, two Connection Blocks (3) at every tandem two ends are all connected to Connection Block (3) side wall lower ends by two ends and are connected with lower floor's rib (5) of quadra inwall lower end, the quantity of described knee-piece filter plate is two pieces, in one piece of knee-piece filter plate inner stripe knee-piece (6) horizontally set and the gap embedded between adjacent two horizontally-arranged Connection Blocks (3) and the lateral clearance between horizontally-arranged Connection Block (3) and quadra, another block knee-piece filter plate inner stripe knee-piece (6) is longitudinally arranged and in the gap embedded between adjacent two tandem Connection Blocks (3) and the axial clearance between tandem Connection Block (3) and quadra.
4. the bottom nozzle of reactor fuel assemblies according to claim 2, is characterized in that: the angle that between Connection Block (3) center of described Connection Block group corner and two Connection Block (3) centers of its two neighbour, line is formed is not less than 90 °.
5. the bottom nozzle of reactor fuel assemblies according to claim 1, is characterized in that: the wavy bent limit (602) of described bar shaped knee-piece (6) is the repeatedly bent limit that forms of bending, both sides immediately below straight flange (601).
6. the bottom nozzle of the reactor fuel assemblies according to any one of Claims 1 to 5, is characterized in that: described base matrix also comprises four supporting legs (1) being connected to lower end, quadra four right angle corner places.
7. the bottom nozzle of reactor fuel assemblies according to claim 6, is characterized in that: described supporting leg (1) and quadra become one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483914.9A CN103021477B (en) | 2012-11-26 | 2012-11-26 | Lower pipe base of reactor fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483914.9A CN103021477B (en) | 2012-11-26 | 2012-11-26 | Lower pipe base of reactor fuel assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103021477A CN103021477A (en) | 2013-04-03 |
| CN103021477B true CN103021477B (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210483914.9A Active CN103021477B (en) | 2012-11-26 | 2012-11-26 | Lower pipe base of reactor fuel assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN103021477B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337262B (en) * | 2013-06-18 | 2016-06-22 | 中国核动力研究设计院 | A kind of bottom nozzle with filtering foreign matter function |
| WO2018098703A1 (en) * | 2016-11-30 | 2018-06-07 | 中广核研究院有限公司 | Fuel assembly and tube base thereof |
| CN106504799B (en) * | 2016-11-30 | 2018-04-17 | 中广核研究院有限公司 | The tube socket of fuel assembly and fuel assembly |
| CN106782683B (en) * | 2016-11-30 | 2018-06-19 | 中广核研究院有限公司 | Fuel assembly and its tube socket and the anti-foreign matter component applied to tube socket |
| RU2654531C1 (en) * | 2017-09-29 | 2018-05-21 | Акционерное общество "ТВЭЛ" (АО "ТВЭЛ") | Nuclear reactor fuel assembly |
| CN109603253A (en) * | 2018-12-28 | 2019-04-12 | 中广核研究院有限公司 | Fuel assembly, tube socket and its filter device |
| CN113362976A (en) * | 2021-06-04 | 2021-09-07 | 中国核动力研究设计院 | Efficient filtering lower pipe seat, fuel assembly and nuclear reactor |
| CN115206557B (en) * | 2022-07-07 | 2024-01-30 | 中国核动力研究设计院 | Fuel assembly lower tube seat and filter assembly based on space curved surface channel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070039296A1 (en) * | 2003-03-18 | 2007-02-22 | Donaldson Company Inc. | Process and materials for coiling z-filter media, and/or closing flutes of filter media; and, products |
| CN1993163A (en) * | 2004-06-08 | 2007-07-04 | 唐纳森公司 | Z-filter media pack arrangements and methods |
| CN102750991A (en) * | 2012-07-19 | 2012-10-24 | 中国核动力研究设计院 | Nuclear fuel component lower pipe seat with filter plate and filter plate processing technology of nuclear fuel component lower pipe seat |
| CN202887743U (en) * | 2012-11-26 | 2013-04-17 | 中国核动力研究设计院 | Lower tube seat of reactor fuel component |
-
2012
- 2012-11-26 CN CN201210483914.9A patent/CN103021477B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070039296A1 (en) * | 2003-03-18 | 2007-02-22 | Donaldson Company Inc. | Process and materials for coiling z-filter media, and/or closing flutes of filter media; and, products |
| CN1993163A (en) * | 2004-06-08 | 2007-07-04 | 唐纳森公司 | Z-filter media pack arrangements and methods |
| CN102750991A (en) * | 2012-07-19 | 2012-10-24 | 中国核动力研究设计院 | Nuclear fuel component lower pipe seat with filter plate and filter plate processing technology of nuclear fuel component lower pipe seat |
| CN202887743U (en) * | 2012-11-26 | 2013-04-17 | 中国核动力研究设计院 | Lower tube seat of reactor fuel component |
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| Publication number | Publication date |
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| CN103021477A (en) | 2013-04-03 |
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