CN202948733U - Positioning grillwork with hooking prevention and blending action for nuclear fuel assembly - Google Patents

Positioning grillwork with hooking prevention and blending action for nuclear fuel assembly Download PDF

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Publication number
CN202948733U
CN202948733U CN2012207099156U CN201220709915U CN202948733U CN 202948733 U CN202948733 U CN 202948733U CN 2012207099156 U CN2012207099156 U CN 2012207099156U CN 201220709915 U CN201220709915 U CN 201220709915U CN 202948733 U CN202948733 U CN 202948733U
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China
Prior art keywords
guide vane
strips
fuel assembly
nuclear fuel
hooking
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Expired - Lifetime
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CN2012207099156U
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Chinese (zh)
Inventor
陈杰
雷涛
程华旸
彭园
张世权
雍泾
张�林
肖忠
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Nuclear Power Institute of China
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Nuclear Power Institute of China
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Priority to CN2012207099156U priority Critical patent/CN202948733U/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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Abstract

The utility model discloses a positioning grillwork with hooking prevention and blending action for a nuclear fuel assembly, and the positioning grillwork comprises a grillwork, wherein the grillwork is formed by mutually vertically interweaving a plurality of strips; the strips comprise inner strips and outer strips; the outer strips are arranged outside the inner strips, and the outer strips are vertically connected with the corresponding inner strips; the upper end and lower end of each outer strip are symmetrically provided with a plurality of guide wings; and the guide wings are provided with through holes, and the guide wings are arranged on the intersection position of the inner strips and the outer strips. According to the utility model, the outer strips adopt the upper guide wings which are continuously arranged, so that the hooking prevention property is enhanced; the opened guide winds can permit a cooling agent to horizontally pass through, so that the horizontal blending property between adjacent nuclear fuel assemblies; and the openings of the guide wings can be used for reducing the obstruction on the circulation area of lattice cells positioned on opposite sides so as to be conductive to reducing the local pressure loss and increasing the heat engineering safety allowance.

Description

The grid spacer that use is mixed up in anti-hooking and friendship that has that is used for nuclear fuel assembly
Technical field
The utility model relates to the grid spacer that mixes up use for the anti-hooking of having of nuclear fuel assembly and friendship, belongs to the design of pressurized-water reactor nuclear power plant spacer grid of fuel assembly.
Background technology
Existing pressurized-water reactor nuclear power plant fuel assembly commonly used is comprised of some fuel rods, guide pipe, grid spacer and upper bottom nozzle etc.Grid spacer is as the important component part of skeleton, and its major function one is that the clamping fuel rod makes its location, and the 2nd, mix fluid to improve the critical heat flux density of fuel assembly.
Traditional grid spacer strap arrangements outside it has guide vane, in loading and unloading material hoisting process, the hooking phenomenon occurs to prevent fuel assembly.Take French AFA3G grid spacer as example, its outer band lower guide guide vane is complete proper alignment, but the upper guide guide vane arranges for plug hole, and according to the empirical evidence of reloading both at home and abroad, this arrangement form of upper guide guide vane makes grid spacer have larger hooking risk; On the other hand, modified AFA3G grid spacer is prevented the hooking design mainly for the upper guide guide vane, namely adopt the complete proper alignment of similar lower guide guide vane form, but the cooling medium that has hindered between adjacent two fuel assemblies mixes laterally, increased simultaneously the partial drop of pressure of limit lattice cell.
The utility model content
the purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art, be provided for the anti-hooking of having of nuclear fuel assembly and friendship and mix up the grid spacer of use, this grid spacer adopts the upper guide guide vane the complete proper alignment of similar lower guide guide vane, coordinate simultaneously and mix wing plug hole in the perforate of upper guide guide vane on inboard first interior band, thereby make grid spacer have anti-hooking ability, the guide vane of processing through perforate on the other hand can not hinder the cooling medium cross flow between adjacent component yet, strengthen the friendship mixcibility energy between assembly, guide vane perforate has simultaneously also reduced the obstruction of opposite side lattice cell circulation area, be conducive to reduce local pressure loss, improve thermal technology's safety allowance, use is mixed up in the friendship that final this grid spacer has concurrently between anti-hooking effect and assembly.
The purpose of this utility model is achieved through the following technical solutions: the grid spacer that use is mixed up in anti-hooking and friendship that has that is used for nuclear fuel assembly, comprise the screen work that mutually vertically interweaves and consist of by some bands, described band is divided into interior band and outer band, outer band is arranged on the outside of interior band, and outer band and corresponding vertical connection of interior band, the two ends up and down of described outer band are symmetrically arranged with several guide vanes, be provided with through hole on guide vane, and guide vane is arranged on interior band and outer ribbing cross place.On guide vane, thereby perforate makes grid spacer have anti-hooking ability, and the guide vane of processing through perforate on the other hand can not hinder the cooling medium cross flow between adjacent component yet, strengthens the friendship mixcibility energy between assembly.
Further, at interval of after a guide vane, on the guide vane of correspondence, through hole is set in described guide vane.A plurality of screen works put together use mutually, and the adjacent grid that the guide vane of each perforate is corresponding does not have the guide vane of perforate, have realized that cooling medium laterally passes through, and have strengthened the horizontal friendship mixcibility energy between adjacent fuel assembly.
Further, the height of the described guide vane that through hole is not set higher than or equal to be provided with the height of the guide vane of through hole.The height of guide vane designs according to concrete the use with the height relationships of the guide vane that is provided with through hole.
Further, each right-angled intersection place between described interior band is provided with a pair ofly mixes the wing, and every pair is mixed the wing and is symmetrical arranged centered by the right-angled intersection point of correspondence.Mix the wing and be the friendship of convection cell and mix up use, thereby make screen work have stronger friendship mixcibility energy.
Further, the number of openings on described guide vane is one, is shaped as the one or more combination in circle, ellipse or polygon.The concrete shape of through hole is set according to on-the-spot actual the use, is not limited to several forms for example.
Further, the number of openings on described guide vane is several, is cellular setting on guide vane.
In sum, the beneficial effects of the utility model are:
(1) outer band adopts the upper guide guide vane of arranging continuously, and anti-hooking performance is enhanced;
(2) guide vane of perforate can allow cooling medium laterally to pass through, thereby has strengthened the horizontal friendship mixcibility energy between adjacent fuel assembly;
(3) the guide vane perforate has reduced the obstruction of opposite side lattice cell circulation area, is conducive to reduce local pressure loss, improves thermal technology's safety allowance.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is embodiment 2 structural representations.
Mark and corresponding parts title in accompanying drawing: 1-outer band; 2-guide vane; 3-through hole; 4-interior band; 5-mix the wing.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited only to this.
Embodiment 1:
As shown in Figure 1, the grid spacer that use is mixed up in anti-hooking and friendship that has that is used for nuclear fuel assembly, comprise the screen work that mutually vertically interweaves and consist of by some bands, described band is divided into interior band 4 and outer band 1, outer band 1 is arranged on the outside of interior band 4, and outer band 1 and the corresponding vertical connection of interior band 4, and the two ends up and down of described outer band 1 are symmetrically arranged with several guide vanes 2, guide vane 2 tops are divided and are provided with through hole 3, and guide vane 2 is arranged on interior band 4 and outer band 1 intersection.The guide vane 2 on the outer band of grid spacer 1 top arranges continuously, namely adopts and the similar proper alignment fully of the guide vane 2 of bottom, coordinates to mix the wing 5 plug holes on the interior band 4 in first of inboard, divides on guide vane 2 tops on top through hole 3 is set.
The end face of one end of guide vane 2 is linearly, and the end contact of this end face and outer band 1, an end relative with it is wavy for what rise and fall, wave trough position almost with the end contact of outer band 1, make the relative height of its crest higher, area when through hole 3 is set is larger, and alternative is larger.
The height of the described guide vane 2 that through hole 3 is not set higher than or equal to be provided with the height of the guide vane 2 of through hole 3.Perforate guide vane 2 height can be with perforate guide vane 2 be not consistent, also can be slightly short, and use according to reality and design.
At interval of after a guide vane 2, on the guide vane 2 of correspondence, through hole 3 is set in described guide vane 2; Each right-angled intersection place between described interior band 4 is provided with a pair ofly mixes the wing 5, and every pair is mixed the wing 5 and is symmetrical arranged centered by the right-angled intersection point of correspondence.the not perforate guide vane 2 on the outer band of grid spacer 1 top is alternately arranged with perforate guide vane 2 plug holes, present the one-to-one relationship that both cooperatively interacts between the two adjacent groups part, again in conjunction with mixing the wing 5 on interior band 4, form the horizontal flow-guiding channel of cooling medium between the two adjacent groups part, thereby make cooling medium laterally to hand over mixed in the inner formation of single component under the effect of mixing the wing 5, can also further be subjected to simultaneously adjacent two assemblies not the guiding function of perforate guide vane 2 and perforate guide vane 2 realize that the horizontal friendship between assembly mixes, the complete horizontal flow field smoothly of the whole reactor core scope of final formation.
After described guide vane 2 arranges through hole 3, do not hinder its anti-hooking effect, this grid spacer has good anti-hooking performance.
Through hole 3 quantity on described guide vane 2 are one, are shaped as the one or more combination in circle, ellipse or polygon.Use the shape of setting through hole 3 according to reality, adopt the combination of various shape, be not limited to the shape of lifting.
A through hole 3 that arranges on guide vane 2, when grid spacer carried out work, cooling medium can converge into one, pass through from guide vane 2 smoothly, cooling medium is subject to the effect of flow velocity and other power when circulation, can the surface of guide vane 2 be impacted, if through hole 3 is not set, guide vane 2 is in long-time process of impacting, easily occur damaging, affect serviceable life, single through hole 3, diameter is large, be convenient to confluxing of cooling medium, circulation is large, has reached better cooling effect.
Especially, through hole 3 is circular in the present embodiment, and when diameter was Φ 3.5mm, single through hole increased circulation area 9.62mm 2, every screen work has increased 307.9mm with respect to modified AFA3G screen work 2The coolant flow area, this is equivalent to 12% of the circulation area that reduces after the guide vane polishing, thereby has strengthened the horizontal friendship mixcibility energy between adjacent fuel assembly.
In the present embodiment, after offering single manhole 3, relatively and modified AFA3G screen work, can promote for the vortex factor (FSM) of estimating screen work friendship mixcibility energy, promoted simultaneously the mixed rate (SM) of vortex friendship, cross-current hands over the mixed factor (FCM) also to promote, and whirlpool and horizontal strength of flow and operating distance are all greater than modified AFA3G screen work, and increased and be used for estimating the friendship of the handing over mixed effect evenness that is mixed, strengthened the horizontal friendship mixcibility energy between adjacent fuel assembly.
Embodiment 2:
As shown in Figure 2, embodiment 2 is basic identical with the structure of embodiment 1, and difference is: through hole 3 quantity on described guide vane 2 are several, are cellular setting on guide vane 2.After through hole 3 was cellular the setting, the single diameter of through hole 3 was little, but whole area increases, and had improved the mixed effect of friendship of fluid.
The guide vane 2 that the process perforate is processed can not hinder the cooling medium cross flow between adjacent component yet, strengthen the friendship mixcibility energy between assembly, guide vane 2 perforates have simultaneously also reduced the obstruction of opposite side lattice cell circulation area, are conducive to reduce local pressure loss, improve thermal technology's safety allowance.
When the quantity of the through hole 3 on guide vane 2 is several cellular settings, the diameter of each through hole 3 is little, when opposing the passing through of cooling medium, cooling medium is divided into some strands to be passed through, reduced the impulsive force that unit area is subject to, provide prolongation the serviceable life for guide vane 2, reduced the frequency of changing.The circulation area of cooling medium increases simultaneously, cooling better effects if.
Especially, through hole 3 is circular in the present embodiment, and diameter is Φ 1mm, when number of openings is 20, and single guide vane place's increase circulation area 15.7mm 2, every screen work has increased 502.7mm with respect to modified AFA3G screen work 2The coolant flow area, this is equivalent to 20% of the circulation area that reduces after the guide vane polishing.
With respect to follow-on AFA3G screen work limit lattice cell, increased approximately the ability of fluid communication between 40% limit lattice cell and adjacent component.
In the present embodiment, after offering cellular manhole 3, relatively and modified AFA3G screen work, can promote for the vortex factor (FSM) of estimating screen work friendship mixcibility energy, friendship mixes also lifting greatly of rate (SM) for vortex, and has promoted the mixed factor (FCM) of cross-current friendship, and whirlpool and horizontal strength of flow and operating distance are all greater than modified AFA3G screen work, promoted and be used for estimating the friendship of the handing over mixed effect evenness that is mixed, strengthened the horizontal friendship mixcibility energy between adjacent fuel assembly.
Take aforesaid way, just can realize preferably the utility model.

Claims (6)

1. the grid spacer that use is mixed up in anti-hooking and friendship that has that is used for nuclear fuel assembly, comprise the screen work that mutually vertically interweaves and consist of by some bands, described band is divided into interior band (4) and outer band (1), outer band (1) is arranged on the outside of interior band (4), and outer band (1) and the corresponding vertical connection of interior band (4), it is characterized in that: the two ends up and down of described outer band (1) are symmetrically arranged with several guide vanes (2), be provided with through hole (3) on guide vane (2), and guide vane (2) is arranged on interior band (4) and outer band (1) intersection.
2. the grid spacer that mixes up use for the anti-hooking of having of nuclear fuel assembly and friendship according to claim 1, is characterized in that: at interval of after a guide vane (2), on the guide vane (2) of correspondence, through hole (3) is set in described guide vane (2).
3. the grid spacer that mixes up use for the anti-hooking of having of nuclear fuel assembly and friendship according to claim 2 is characterized in that: the height of the described guide vane (2) that through hole (3) are not set higher than or equal to be provided with the height of the guide vane (2) of through hole (3).
4. the grid spacer that mixes up use for the anti-hooking of having of nuclear fuel assembly and friendship according to claim 1, it is characterized in that: each right-angled intersection place between described interior band (4) is provided with a pair ofly mixes the wing (5), and every pair is mixed the wing (5) and is symmetrical arranged centered by the right-angled intersection point of correspondence.
5. the grid spacer that mixes up use for the anti-hooking of having of nuclear fuel assembly and friendship according to claim 1, it is characterized in that: through hole (3) quantity on described guide vane (2) is one, is shaped as the one or more combination in circle, ellipse or polygon.
6. the grid spacer that mixes up use for the anti-hooking of having of nuclear fuel assembly and friendship according to claim 1, it is characterized in that: through hole (3) quantity on described guide vane (2) is several, is cellular setting on guide vane (2).
CN2012207099156U 2012-12-20 2012-12-20 Positioning grillwork with hooking prevention and blending action for nuclear fuel assembly Expired - Lifetime CN202948733U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050153A (en) * 2012-12-20 2013-04-17 中国核动力研究设计院 Location grid having hanging prevention and mixing functions for nuclear fuel assemblies
CN103544997A (en) * 2013-10-28 2014-01-29 中科华核电技术研究院有限公司 Positioning grid rack and reactor fuel assembly
CN106710641A (en) * 2017-01-09 2017-05-24 中国核动力研究设计院 Positioning grillwork for nuclear fuel assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050153A (en) * 2012-12-20 2013-04-17 中国核动力研究设计院 Location grid having hanging prevention and mixing functions for nuclear fuel assemblies
CN103544997A (en) * 2013-10-28 2014-01-29 中科华核电技术研究院有限公司 Positioning grid rack and reactor fuel assembly
CN103544997B (en) * 2013-10-28 2016-08-17 中科华核电技术研究院有限公司 Grid spacer and reactor fuel assemblies
CN106710641A (en) * 2017-01-09 2017-05-24 中国核动力研究设计院 Positioning grillwork for nuclear fuel assembly
CN106710641B (en) * 2017-01-09 2018-04-24 中国核动力研究设计院 A kind of grid spacer for nuclear fuel assembly

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Granted publication date: 20130522