WO2016086810A1 - 整流型导向翼结构及搅混格架 - Google Patents
整流型导向翼结构及搅混格架 Download PDFInfo
- Publication number
- WO2016086810A1 WO2016086810A1 PCT/CN2015/095903 CN2015095903W WO2016086810A1 WO 2016086810 A1 WO2016086810 A1 WO 2016086810A1 CN 2015095903 W CN2015095903 W CN 2015095903W WO 2016086810 A1 WO2016086810 A1 WO 2016086810A1
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- Prior art keywords
- mixing
- wing
- strip
- grid
- outer strip
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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
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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
- G21C3/322—Means to influence the coolant flow through or around the bundles
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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
Definitions
- the present invention relates to a reactor component, and more particularly to a rectifying guide vane structure and a scramble grid having the rectifying guide vane structure.
- a certain number of fuel rods are arranged at regular intervals (eg, 15 ⁇ 15 or 17 ⁇ 17, etc.) and are fixed into a bundle called a reactor fuel assembly.
- the reactor fuel assembly is mainly composed of an upper header, a lower header, and a mixing grid ( Also known as the positioning grid), the control rod guide tube and the fuel rod.
- the mixing grid is used for loading the fuel rod and is composed of a plurality of inner strips and outer strips surrounding the inner strips, and the inner strips are divided into two horizontal and vertical arrangement modes and intersect each other (generally orthogonal)
- a grid-like grid structure having a plurality of grid cells is formed, and the fuel rods are housed in the grid cells.
- the mixing wings a extending into the grid unit are generally provided on the inner strip, and cooling is utilized.
- the cross flow and eddy current generated by the agent flowing through the mixing wing a improves the fluidity of the coolant in the fuel assembly and between the fuel assemblies, thereby increasing the thermal headroom of the fuel assembly.
- the lifting of the fuel assembly can only be carried out vertically, preventing excessive lateral deformation.
- the design of the guide vanes b is not reasonable.
- the guide vanes b are arranged at intervals on the outer strips. The method facilitates the flow of coolant from the gap between the two guide vanes b to the adjacent fuel assembly, but also due to the presence of the gap, the fuel assembly is prone to interference between components when hoisting, and the guiding effect is not good.
- the shape of the guide wing b not only affects the guiding function of the mixing frame, but also affects the coolant flowability between the fuel assemblies. Therefore, it is necessary to provide a guide wing structure having a rectifying action to solve the above problems existing in the prior art.
- Another object of the present invention is to provide a mixing frame having the guide wing structure.
- the present invention provides a rectifying type guide wing structure, which is disposed on an outer strip of a mixing grid, wherein the mixing grid is provided with a plurality of inner strips and a plurality of grid units are formed.
- a first mixing wing is disposed in a grid unit adjacent to the outer strip, and the first mixing wing is disposed in the An inner strip of the outer strip that is joined to and extends from another inner strip that is in contact with the outer strip
- the rectifying guide wing structure comprising a plurality of first guide wings, a plurality of the first guide wings are spaced apart from the upper edge and/or the lower edge of the outer strip and extend obliquely toward the interior of the scintillation grid, the position of the first guide wing being confused with the first
- the first guiding wing is recessed toward a side of the interior of the mixing frame to form a drainage groove, and the drainage groove extends from the outer strip toward the inside of the mixing frame.
- the drainage groove can function as a confluence due to the structure of the recess, that is, the phase is about Introducing a coolant fluid flowing out of the adjacent fuel assembly into the grid unit in which it is located, enhancing flow exchange between the fuel assemblies, and the coolant fluid is guided through the drain tank and then mixed through the first mixing wing
- the direction of change can be circulated around the fuel rod in the grid unit, which is advantageous for heat dissipation.
- the rectifying guide wing structure further comprising a plurality of second guiding wings, a plurality of the second guiding And the first guiding wing is arranged alternately on the upper edge and/or the lower edge of the outer strip and extends obliquely to the interior of the scintillating grid, the position of the second guiding wing and the second Corresponding to the mixing wing, the second guiding wing protrudes toward a surface of the interior of the mixing frame, and the dividing ridge extends from the outer strip toward the inside of the mixing frame.
- the engagement of the drainage groove and the splitter ridge can enable the first guide wing,
- the two guide wings and the mixing wings form a complete fluid path for the coolant in the fuel assembly, which facilitates good heat dissipation of the fuel rod.
- the splitter ridge splits the backflow into the fuel assembly to both sides of the second guide vane, reducing the flow of coolant into the flow passage, thereby reducing the kinetic energy of coolant convection in the flow passage. Having sufficient kinetic energy of the coolant to flow to the adjacent fuel assemblies via the second guide vanes avoids flow cuts and enhances flow transfer between adjacent fuel assemblies.
- the surface flatness of the first guide wing and the second guide wing can be reduced, the direct impact of the coolant on the first guide wing and the second guide wing can be avoided, and the coolant turbulence can be effectively weakened. flow.
- drain groove and the splitter ridge are turned toward the direction perpendicular to the edge of the outer strip
- the inside of the grid extends.
- the drainage trough and the diverting ridge are disposed perpendicular to the direction of the outer strip so as to correspond to the direction in which the inner strip is disposed, thereby facilitating the formation of a complete fluid path within the fuel assembly.
- the length of the first guiding wing extending into the mixing frame is greater than the length of the second guiding wing extending into the mixing frame.
- the second guide vanes are arranged to be shorter in order to allow coolant fluid to flow out through the second guide vanes and to the adjacent fuel assemblies.
- the length of the drain groove extends greater than the length of the splitter ridge extension.
- first guiding wing and the second guiding wing are both located at the intersection of two adjacent grating units.
- the present invention also discloses an agitating grid comprising an outer strip and a plurality of inner strips, the plurality of inner strips intersecting each other to form a plurality of grid units, the outer strips surrounding a plurality of a periphery of the grid unit and fixed to the inner strip, and two of the grid units adjacent to and adjacent to the outer strip respectively have a first mixing wing and a second mixing wing, the first a mixing wing is disposed on an inner strip that is in contact with the outer strip and is bent to extend to another inner strip that is in contact with the outer strip, the second mixing wing is disposed And extending to the outer strip parallel to the outer strip, the scintillation grid further comprising the rectifying guide wing structure.
- the first guiding wing and the second guiding wing on the mixing frame of the present invention are arranged in an alternating arrangement, that is, continuously arranged without a gap, so that it is not easy to occur when the fuel assembly is hoisted
- the interference between components ensures the guiding effect.
- the drainage groove and the split ridge respectively disposed on the first guide wing and the second guide wing can rectify and enhance the flow transmission between adjacent fuel assemblies.
- the first mixing wing is fixed to an upper edge of the inner strip and adjacent to the inner strip parallel to the outer strip
- the second mixing wing is fixed to the inner strip An upper edge and adjacent the inner strip opposite the first mixing wing.
- FIG. 1 is a schematic view showing the arrangement of a guide wing in the prior art.
- FIG. 2 is a schematic view showing the arrangement of another guide wing in the prior art.
- Figure 3 is a schematic illustration of a partial flow field of the position of the outer strip of two adjacent mixing frames of the present invention.
- Figure 4 is an enlarged view of the first guide wing and the second guide wing in the present invention.
- Figure 5 is a cross-sectional view of the first guide wing and the second guide wing of Figure 4 taken along the line A-A.
- Fig. 6 is a schematic view showing the shape of a drain groove and a splitter ridge according to another embodiment of the present invention.
- Fig. 7 is a schematic view showing the arrangement form of the drainage groove in another embodiment of the present invention.
- Figure 8 is a vertical cross-sectional view of the first guide and outer strips of Figure 7.
- the present invention provides a mixing grid 1 for use in a fuel assembly that includes an outer strip 10, a plurality of inner strips, and a rectifying guide vane structure.
- the plurality of inner strips includes a plurality of first inner strips 11 disposed vertically (in the direction of FIG. 3) and a plurality of second inner strips 12 disposed laterally (in the direction of FIG. 3), and the plurality of first inner strips 11 Arranged parallel to each other and equally spaced, a plurality of second inner strips 12 are arranged parallel to each other and equally spaced, the first inner strip 11 and the second inner strip 12 intersect each other to form a grid structure and have a plurality of hollow grids Unit 13, grill unit 13 houses fuel rod 2.
- the outer strip 10 surrounds the periphery of the plurality of grid units 13 and is fixed to the first inner strip 11 and the second inner strip 12.
- a flow passage 130 is formed between each two adjacent grid units 13, and the grid unit 13 bordering the outer strip 10 is surrounded by three flow channels 130 and the outer strip 10, and is not in the middle position
- the grid unit 13 with 10 borders is surrounded by four flow channels 130.
- the first inner strip 11 is provided with a plurality of first mixing wings 110 respectively extending obliquely into the grill unit 13, and the second inner strip 12 is provided with a plurality of second obliquely extending into the grill unit 13 respectively.
- the wing 120 is stirred.
- the first mixing wing 110 and the second mixing wing 120 function to create a disturbance to the bottom-up coolant fluid and create a cross flow, which improves the mixing performance of the mixing frame 1, thereby improving the thermal performance of the fuel assembly.
- the number of the first mixing wings 110 and the second mixing wings 120 and the setting positions thereof are all conventional technical choices that can be made by those skilled in the art without any creative work, and thus are not limited in the present invention.
- the arrangement of the first mixing wing 110 and the second mixing wing 120 is now described as follows: the first mixing wing 110 is fixed to the first inner strip 11 The edge is adjacent to the intersection of the first inner strip 11 and the second inner strip 12, and the second scuffing wing 120 is fixed to the upper edge of the second inner strip 12 and adjacent to the first inner strip 11 and the second inner portion The intersection of the strips 12. Both the first mixing wing 110 and the second mixing wing 120 are located within the flow channel 130.
- the intersection of the inner strips 12 is centrally symmetric. Specifically, when the fuel rod 2 is inserted into the grid structure, a space is formed between each of the four adjacent fuel rods 2, and the first first inner strip 11 and the adjacent two first mixing wings 110 and Two second mixing wings 120 located in the same second inner strip 12 and adjacent to each other are disposed in such a space. Further, two first mixing wings 110 and two second mixing wings 120 are respectively disposed in any two adjacent spaces. Since a large space is formed between the four adjacent fuel rods 2, the coolant easily forms a turbulent flow in the gap, so that the adjacent two mixing wings are disposed in this space in pairs, starting from the coolant To guide, steady flow.
- the rectifying guide vane structure is disposed on the outer strip 10 of the scintillation grid 1, and the rectifying guide vane structure includes a plurality of first guide vanes 14 and second guide vanes 15.
- a plurality of first guide vanes 14 and a plurality of second guide vanes 15 are alternately arranged on the upper and lower edges of the outer strip 10 and extend obliquely toward the inside of the scintillation grid 1.
- the rectifying guide wing structure will be briefly described below by taking two grid units 13 adjacent to the outer strip 10 as an example.
- the first mixing flap 110 is disposed on a first inner strip 11 that is in contact with the outer strip 10 and is attached to the outer strip 10
- a first inner strip 11 is bent and extended, and it can be said that the second inner mixing flap 120 is bent and extended.
- the second mixing wing 120 is disposed in another grid unit 13 adjacent to the grid unit 13 in which the first mixing wing 110 is disposed, and is located on the second inner strip 12 parallel to the outer strip 10 and is outwardly stripped
- the belt has 10 bends to extend.
- the first mixing wing 110 is located adjacent to the second inner strip 12 that is parallel to the outer strip 10, and the second blending wing 120 is positioned adjacent to the first mating wing 110 (ie, without the first mixing wing 110 being disposed) Inner strip 11.
- Both the first guide wing 14 and the second guide wing 15 are located at the junction of two adjacent grid units 13.
- the position of the first guide wing 14 corresponds to the first mixing wing 110
- the position of the second guide wing 15 corresponds to the second mixing wing 120.
- the length of the first guide vane 14 extending into the scintillation grid 1 is greater than the length of the second guide vane 15 extending into the scintillation grid 1.
- the first guide wing 14 and the second guide wing 15 are respectively disposed at the intersection of the adjacent grid units 13, which can strengthen the strength of the mixing frame 1 and avoid the process of loading and unloading.
- the adjacent mixing grid 1 interferes and hooks.
- the first guiding wing 14 is recessed to form a drainage groove 140 toward the inner side of the mixing frame 1.
- the second guiding wing 15 protrudes toward the inner side of the mixing frame 1 to form a component flow ridge 150.
- the drainage groove 140 and the dividing ridge 150 are provided by the outer strip.
- the belt 10 extends toward the inside of the agitating grid 1 in a direction perpendicular to the edge of the outer strip 10, and the length of the drainage groove 140 extends is greater than the length of the splitter ridge 150.
- the drainage groove 140 and the splitter ridge 150 are disposed perpendicular to the direction of the outer strip 10 so as to correspond to the direction in which the first inner strip 11 and the second inner strip 12 are disposed, thereby facilitating the formation of a complete fluid in the fuel assembly. path.
- the direction in which the drain groove 140 and the splitter ridge 150 extend are located in the flow channel 130, ensuring that the coolant fluid guided through the drain groove 140 is consistent with the coolant fluid in the flow channel 130, and the splitter ridge 150 is better. Diversion effect.
- the specific shape of the drainage groove 140 is a depression formed on a side of the first guide wing 14 facing the inside of the mixing grid 1 and having a triangular cross section
- the splitter ridge 150 is convexly formed on the second guide wing 15 .
- the shape of the drain groove 140 and the splitter ridge 150 may be other forms, and the cross section shown in FIG. 6 is circular, trapezoidal or the like.
- the drainage groove 140 and the splitter ridge 150 may also be formed by directly bending the first guide wing 14 and the second guide wing 15 in different directions, and the first guide wing 14 or the second guide wing 15 is turned toward the mixing.
- the entire face of the interior of the shelf 1 is a drainage channel 140 or a splitter ridge 150.
- the first guide wing 14 may be formed in a stamped form to form the drainage groove 140, specifically, the first guide wing 14 is stamped from the inside to the outside, so that The outer side of the first guide wing 14 forms an outwardly projecting boat-shaped structure 143, and the inner side of the boat-shaped structure 143 is concave, that is, formed as a drainage groove 140.
- the shunt ridge 150 can also be formed on the second guide wing 15 by punching the boat structure from the outside to the inside.
- first guiding wing 14 and the second guiding wing 15 may be disposed only on the upper edge of the outer strip 10, or may be disposed only on the lower edge of the outer strip 10, and the specific setting may be determined according to actual requirements. set.
- first guide wing 14 and the second guide wing 15 of the mixing frame 1 of the present invention are alternately arranged, that is, continuously arranged without spacing, it is not easy to be hoisted when the fuel assembly is hoisted The situation of inter-component interference occurs to ensure the guiding effect.
- a drainage groove 140 is disposed on the second guide wing 15
- a split ridge 150 is disposed on the second guide wing 15 .
- the engagement of the drainage groove 140 and the splitter ridge 150 can enable the first guide wing 14 , the second guide wing 15 and the first mixing wing 110 ,
- the second mixing wing 120 forms a complete fluid path for the coolant within the fuel assembly, facilitating good heat dissipation of the fuel rod 2.
- the splitter ridge 150 splits the return flow into the fuel assembly to both sides of the second guide vane 15, reducing the flow of coolant into the flow passage 130, thereby reducing the rushing kinetic energy of the coolant in the flow passage 130, thereby
- the coolant has sufficient kinetic energy to flow to the adjacent fuel assemblies via the second guide vanes 15, avoiding flow cuts and enhancing flow transfer between adjacent fuel assemblies.
- the surface flatness of the first guide wing 14 and the second guide wing 15 can be reduced, and the direct impact of the coolant on the first guide wing 14 and the second guide wing 15 can be avoided, effectively weakening Turbulent flow of the coolant.
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Abstract
Description
Claims (8)
- 一种整流型导向翼结构,设置于搅混格架的外条带,所述搅混格架内设有多个内条带并形成多个格栅单元,与所述外条带邻接的一所述格栅单元内具有第一搅混翼,所述第一搅混翼设置于与所述外条带相接的一所述内条带上并向与所述外条带相接的另一所述内条带弯折延伸,其特征在于:所述整流型导向翼结构包括多个第一导向翼,多个所述第一导向翼间隔地设置于所述外条带的上边缘和/或下边缘并向所述搅混格架内部倾斜延伸,所述第一导向翼的位置与所述第一搅混翼对应,所述第一导向翼朝向所述搅混格架内部的一面凹陷地形成引流槽,所述引流槽由所述外条带朝所述搅混格架内部延伸。
- 如权利要求1所述的整流型导向翼结构,其特征在于:与设置所述第一搅混翼的所述格栅单元相邻并与所述外条带邻接的另一所述格栅单元内还具有第二搅混翼,所述第二搅混翼设置于与所述外条带平行的所述内条带上并向所述外条带弯折延伸,所述整流型导向翼结构还包括多个第二导向翼,多个所述第二导向翼与所述第一导向翼交替排列地设置于所述外条带的上边缘和/或下边缘并向所述搅混格架内部倾斜延伸,所述第二导向翼的位置与所述第二搅混翼对应,所述第二导向翼朝向所述搅混格架内部的一面突起地形成分流脊,所述分流脊由所述外条带朝所述搅混格架内部延伸。
- 如权利要求2所述的整流型导向翼结构,其特征在于:所述引流槽及分流脊沿垂直于所述外条带的边缘的方向向所述搅混格架内部延伸。
- 如权利要求2所述的整流型导向翼结构,其特征在于:所述第一导向翼向所述搅混格架内延伸的长度大于第二导向翼向所述搅混格架内延伸的长度。
- 如权利要求4所述的整流型导向翼结构,其特征在于:所述引流槽延伸的长度大于所述分流脊延伸的长度。
- 如权利要求2所述的整流型导向翼结构,其特征在于:所述第一导向翼与第二导向翼均位于相邻两个所述格栅单元的交界处。
- 一种搅混格架,包括外条带及多个内条带,多个所述内条带相互交叉形成多个格栅单元,所述外条带围在多个所述格栅单元的外围并与所述内条带固定,与所述外条带邻接并相邻的两个所述格栅单元内分别具有第一搅混翼及第二搅混翼,所述第一搅混翼设置于与所述外条带相接的一所述内条带上并向与所述外条带相接的另一所述内条带弯折延伸,所述第二搅混翼设置于与所述外条带平行的所述内条带上并向所述外条带弯折延伸,其特征在于:所述搅混格架还包括如权利要求1-6任一项所述的整流型导向翼结构。
- 如权利要求7所述的搅混格架,其特征在于:所述第一搅混翼固定于所述内条带的上边缘且靠近与所述外条带平行的所述内条带,所述第二搅混翼固定于所述内条带的上边缘且靠近与所述第一搅混翼相对的所述内条带。
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GB1710623.8A GB2549641B (en) | 2014-12-05 | 2015-11-30 | Deflecting vane structure and mixing grid |
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CN201410736074.1A CN104485138B (zh) | 2014-12-05 | 2014-12-05 | 整流型导向翼结构及搅混格架 |
CN201410736074.1 | 2014-12-05 |
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GB (1) | GB2549641B (zh) |
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Families Citing this family (9)
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CN104485138B (zh) * | 2014-12-05 | 2017-04-26 | 中广核研究院有限公司 | 整流型导向翼结构及搅混格架 |
WO2018053812A1 (zh) * | 2016-09-23 | 2018-03-29 | 中广核研究院有限公司 | 外条带、核反应堆燃料组件的定位格架及核反应堆燃料组件 |
CN106409346B (zh) * | 2016-09-23 | 2017-12-15 | 中广核研究院有限公司 | 外条带、核反应堆燃料组件的定位格架及核反应堆燃料组件 |
EA032448B1 (ru) * | 2016-12-29 | 2019-05-31 | Акционерное Общество "Твэл" | Тепловыделяющая сборка ядерного реактора |
CN107642462A (zh) * | 2017-09-18 | 2018-01-30 | 新疆金风科技股份有限公司 | 整流装置、塔筒以及风力发电机组 |
CN110164567B (zh) * | 2018-03-30 | 2023-01-17 | 吉林农业大学 | 一种压水堆燃料组件格架 |
CN111524616B (zh) * | 2020-05-14 | 2023-09-01 | 吉林农业大学 | 一种基于增材制造工艺的整体式定位格架 |
CN111968760B (zh) * | 2020-08-26 | 2023-03-21 | 西安交通大学 | 一种基于增材制造技术的核燃料组件定位格架 |
CN114220558B (zh) * | 2021-11-18 | 2023-06-13 | 中国核动力研究设计院 | 一种燃料组件格架、燃料组件及压水堆堆芯 |
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2014
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2015
- 2015-11-30 WO PCT/CN2015/095903 patent/WO2016086810A1/zh active Application Filing
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GB2549641A (en) | 2017-10-25 |
GB201710623D0 (en) | 2017-08-16 |
CN104485138B (zh) | 2017-04-26 |
GB2549641B (en) | 2020-09-02 |
CN104485138A (zh) | 2015-04-01 |
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