CN206849509U - Fuel assembly and the screen work for fuel assembly - Google Patents
Fuel assembly and the screen work for fuel assembly Download PDFInfo
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- CN206849509U CN206849509U CN201720572949.8U CN201720572949U CN206849509U CN 206849509 U CN206849509 U CN 206849509U CN 201720572949 U CN201720572949 U CN 201720572949U CN 206849509 U CN206849509 U CN 206849509U
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- fuel rod
- wing
- grid cell
- screen work
- fuel
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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
It the utility model is related to a kind of fuel assembly, including screen work and be provided with along the longitudinally mounted fuel rod in screen work, screen work and mix the wing, the gap mixed between the wing and the neighbouring outline and fuel rod of fuel rod is not more than 2mm.The utility model further relates to a kind of screen work for fuel assembly, it, which surrounds to be respectively equipped with least two in four bands of same grid cell, mixes the wing, in four bands at least two on further respectively have for the firm male member against fuel rod outer surface, the firm male member of same grid cell has an approximate circle fitting contour line using the radius of fuel rod as radius, and gap mixed between the wing and the neighbouring outline and the approximate circle fitting contour line of the approximate circle fitting contour line in the grid cell is not more than 2mm.The existing normal gap of this gap-ratio is small, and effect caused by coolant fluid is improved；The fluid layer of fuel rod surface can be effectively destroyed near fuel rod, mixes effect enhancing.
Description
Technical field
Nuclear reactor is the utility model is related to, more particularly to it is a kind of for the fuel assembly of nuclear reactor and for fuel stack
The screen work of part.
Background technology
Referring to Fig. 1, the fuel assembly 1 in nuclear reactor includes upper base 11, guide pipe 12, screen work 13, fuel rod
14 and bottom nozzle 15.Screen work 13 is located between upper base 11 and bottom nozzle 15 along longitudinal direction, and the screen work 13 includes multiple bands,
Band, which intersects each other, cooperatively forms multiple grid cells.Guide pipe 12 is located between upper base 11 and bottom nozzle 15 along longitudinal direction, and one
End is fixedly linked with upper base 11, and the other end is fixedly linked with bottom nozzle 15, can be parallel to each other between guide pipe 12, and is located at grid
In lattice unit, thus screen work 13 can be directed to pipe 12 and be spaced apart from each other, and control the spacing between guide pipe 12, form fuel stack
The support frame of part 1.Fuel rod 14 is located between upper base 11 and bottom nozzle 15 along longitudinal direction, and in screen work 13, it is general each
Fuel rod 14 is parallel to each other, located at not being directed in the grid cell that pipe 12 occupies.
In nuclear reactor, fuel rod 14 of the coolant flow through fuel assembly 1 of cooling recirculation system, such as along A directions（I.e.
Longitudinal direction）Flow through, by moderation of neutrons and take away disintegration energy.Circulated for above-mentioned cooling, generally also take setting in bar and mix the wing,
Mix the wing to stretch into grill unit, when coolant fluid flows through between each fuel rod 14, by by the stop for mixing the wing 16
And lateral flow is formed, and coolant fluid is mixed, then from laminar flow regime to Turbulent Flow transition, the stable state of coolant fluid
After destroyed, the heat of fuel rod 14 is easier to export, so as to effectively improve thermal technology's surplus of fuel assembly 1.
At present, in the assembling process of fuel assembly 1, mix the wing and be typically integrally formed with band and be made, and with band
Screen work 13 is assembled into the lump, is then loaded fuel rod 14 in the grid cell of screen work 13.To ensure that the safety of fuel rod 14 loads
In grid cell, it need to prevent in assembling process that fuel rod 14 touches and mix the wing, and the shape fabricating requirement for mixing the wing is strict, no
Can arbitrarily it change, but mix the wing needs consideration process tolerance and build-up tolerance to bring with band during being integrally formed
Influence so that the excessive area of grid cell can not be occupied by mixing the wing, need to generally be left in fuel rod 14 and mixing between the wing
Enough gaps.
The gap is a key factor for influenceing thermal technology's surplus in cooling cycle process, if gap is excessive, mixes wing production
Raw lateral flow is weaker, too small to effect caused by coolant fluid；Meanwhile during mixing, closer to fuel rod 14
Alar part of mixing get over and can destroy the fluid layer on the surface of fuel rod 14, then the influence to fuel rod 14 is bigger, therefore excessive
Gap can not effectively destroy the fluid layer on the surface of fuel rod 14, mix decreased effectiveness.To sum up, how the same of thermal technology's surplus is being ensured
When, avoid fuel rod 14 from being interfered with mixing the wing, be to have the problem of to be solved at present.
Utility model content
The technical problems to be solved in the utility model is, for how while thermal technology's surplus is ensured, avoid fuel
Rod interferes with mixing the wing, there is provided a kind of fuel assembly and the screen work for fuel assembly.
Technical scheme is used by the utility model solves its technical problem：A kind of lattice for fuel assembly are provided
Frame, the screen work include multiple bands, and the band, which intersects each other, cooperatively forms multiple grid cells for being used to lay fuel rod,
Surround to be respectively equipped with least two in four bands of the same grid cell and mix the wing, in four bands at least
Further respectively had on two for the firm male member against the fuel rod outer surface, the firm male member of the same grid cell
With the approximate circle fitting contour line using the radius of the fuel rod as radius, in the grid cell to mix the wing approximate with this
Gap between the neighbouring outline of circular fit contour line and the approximate circle fitting contour line is not more than 2mm.
In the screen work according to the utility model embodiment, the just male member includes connected support sector and butting section,
The support sector is the rigid element being connected with the band, and the butting section is the elasticity stretched into the grid cell
Part.
In the screen work according to the utility model embodiment, the outline for mixing the wing includes first paragraph and second segment,
The first paragraph is segmental arc；In a grid cell, the first paragraph is adjacent to the approximate circle fitting contour line
And with this it is approximate circle fitting the concyclic heart of contour line.
The utility model additionally provides a kind of fuel assembly, including screen work and along the longitudinally mounted combustion in the screen work
Charge bar；The screen work includes multiple bands, and the band, which intersects each other, cooperatively forms multiple grid cells, and the fuel rod is corresponding
In the grid cell, the bar, which takes to be additionally provided with, mixes the wing, described to mix the wing and the neighbouring outline of the fuel rod
Gap between the fuel rod is not more than 2mm.
In the fuel assembly according to the utility model embodiment, the outline for mixing the wing includes first paragraph and second
Section, the first paragraph is segmental arc；The first paragraph is adjacent to the fuel rod in a grid cell, and with it is neighbouring
The concyclic heart of fuel rod.
In the fuel assembly according to the utility model embodiment, based on the center of circle, the radius of the fuel rod is less than
The radius of the segmental arc, and difference is not more than 2mm.
In the fuel assembly according to the utility model embodiment, the bar, which takes, is additionally provided with firm male member, described just convex
Component stretches into the grid cell and against the outer surface of the fuel rod.
In the fuel assembly according to the utility model embodiment, the just male member include connected support sector and against
Portion, the support sector are the rigid element being connected with the band, and the butting section is to stretch into the grid cell simultaneously
Against the elastomeric element of the fuel rod.
In the fuel assembly according to the utility model embodiment, in four bands for surrounding the same grid cell
Be respectively equipped with the firm male member at least two, the firm male member of the same grid cell using the radius of the fuel rod as
The outer surface profile line of the approximate circle fitting contour line and the fuel rod of radius essentially coincides.
In the fuel assembly according to the utility model embodiment, the band is integrated punch forming with the wing of mixing
Structure, and the wing of mixing also includes post forming part.
Implement the utility model to have the advantages that：In screen work of the present utility model, same grid cell it is multiple
Firm male member coordinates with the approximate circle fitting contour line using the radius of fuel rod as radius, and the wing is mixed in the grid cell
Gap with the approximate circle fitting contour line between neighbouring outline and the approximate circle fitting contour line is not more than 2mm,
Because the firm male member is used for against the outer surface of fuel rod, therefore the screen work can ensure that fuel rod and mix gap between the wing not
More than 2mm；In fuel assembly of the present utility model, fuel rod and the gap mixed between the wing are no more than 2mm, and this gap-ratio shows
Some normal gaps are small.By reduce gap length mix the wing in grid cell area increase after, caused transverse direction
Flow enhuancement, so as to be improved to effect caused by coolant fluid；Meanwhile gap is reduced and to mix the wing relatively closer to fuel
Rod, so as to effectively destroy the fluid layer of fuel rod surface near fuel rod, mix effect enhancing.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the structural representation of fuel assembly in the prior art；
Fig. 2 is the structural representation of the screen work according to the embodiment of the utility model one；
Fig. 3 is partial cross section's structural representation of the fuel assembly according to the embodiment of the utility model one；
Fig. 4 is the structural representation for mixing the wing according to the embodiment of the utility model one；
Fig. 5 is the flow chart of the assembly method of fuel assembly in Fig. 3；
Fig. 6 is the structural representation for mixing the wing according to example pre-setting of the present utility model；
Fig. 7 is the structural representation for mixing the wing according to another example pre-setting of the present utility model.
Embodiment
Referring to Fig. 2, the screen work for fuel assembly according to the embodiment of the utility model one includes multiple bands 131, bar
Intersected each other with 131 and cooperatively form multiple grid cells 130 for being used to lay fuel rod, surround the four of same grid cell 130
In individual band 131 at least two on be respectively equipped with and mix the wing 16, further respectively had at least two in four bands 131
For against fuel rod（Not shown in figure）The firm male member 18 of outer surface, wherein, multiple just convex structures of same grid cell 130
Part 18 coordinates, with the approximate circle fitting contour line 180 using the radius of fuel rod as radius, stirring in the grid cell 130
Between between the mixed wing 16 and the neighbouring outline and the approximate circle fitting contour line 180 of the approximate circle fitting contour line 180
Gap 17 is not more than 2mm.
In screen work of the present utility model, multiple just male members 18 of same grid cell 130, which coordinate, to be had with fuel rod
Radius is the approximate circle fitting contour line 180 of radius, and the wing 16 of mixing in the grid cell 130 is taken turns with the approximate circle fitting
Gap 17 between the neighbouring outline of profile 180 and the approximate circle fitting contour line 180 is not more than 2mm, because of the firm convex structure
Part 18 is used for against the outer surface of fuel rod, therefore the gap 17 that the screen work can ensure that fuel rod and mix between the wing 16 is no more than
2mm, this gap 17 are smaller than existing normal gap.It is may be sized such that by reducing gap 17 and mixes the wing 16 in grid cell
Area increase in 130, resulting lateral flow enhancing, so as to be improved to effect caused by coolant fluid；Meanwhile
Gap 17, which is reduced, to mix the wing 16 relatively closer to fuel rod, so as to effectively destroy the stream of fuel rod surface near fuel rod
Body layer, mix effect enhancing.
Referring also to Fig. 2, in the screen work of an example embodiment of the present utility model, above-mentioned just male member 18 includes being connected
Support sector 181 and butting section 182, support sector 181 be the rigid element that is connected with band 131, butting section 182 is to stretch into grid
Elastomeric element in unit 130.After fuel rod loads grid cell 130, resilient abutment portion 182 is by against the appearance of fuel rod
Face so that support sector 181 can support fuel rod, and multiple just male members 18 coordinate can effective steady fuel rod.
Referring also to Fig. 2, in the screen work of another example embodiment of the present utility model, mixing the outline of the wing 16 includes
First paragraph 161 and second segment 162, first paragraph 161 are segmental arc；In a grid cell 130, first paragraph 161 is neighbouring approximate
Circular fit contour line 180 and with this it is approximate circle fitting the 180 concyclic heart of contour line, the concyclic core structure, which can improve, mixes the wing 16
Operating efficiency.Thus, the fit radius of first paragraph 161 is more than the fit radius of approximate circle fitting contour line 180, and two
The difference of radius is not more than 2mm.
Referring to Fig. 3, the fuel assembly according to the utility model first embodiment includes screen work and along longitudinally mounted in lattice
Fuel rod 14 in frame；Wherein, screen work includes multiple bands 131, and band 131, which intersects each other, cooperatively forms multiple grid cells
130, fuel rod 14 is corresponding in grid cell 130, is additionally provided with band 131 and mixes the wing 16, mixes the wing 16 and fuel rod 14
Gap 17 between neighbouring outline and fuel rod 14 is not more than 2mm.
It is to be understood that fuel assembly can use any one above-mentioned screen work, therefore the elaboration to fuel assembly can part
Or the above-mentioned elaboration on screen work is all quoted, for example, being additionally provided with the screen work of this fuel assembly for against fuel rod 14
Firm male member 18, so as to effective steady fuel rod 14, certainly, one of ordinary skill in the art can also adopt according to actual conditions
With the screen work without firm male member 18, no longer repeat one by one herein.
In fuel assembly of the present utility model, fuel rod 14 and the gap 17 mixed between the wing 16 are no more than 2mm, this
Gap 17 is smaller than existing normal gap.The area for mixing the wing 16 in grid cell 130 is may be sized such that by reducing gap 17
After increase, caused lateral flow enhancing, so as to be improved to effect caused by coolant fluid；Meanwhile gap 17 is reduced and caused
It is relative closer to fuel rod 14 to mix the wing 16, so as to effectively destroy the fluid layer on the surface of fuel rod 14 near fuel rod 14,
Mix effect enhancing.
Referring also to Fig. 3, in the fuel assembly of an example embodiment of the present utility model, the outline bag of the wing 16 is mixed
First paragraph 161 and second segment 162 are included, first paragraph 161 is segmental arc；First paragraph 161 is adjacent to fuel in a grid cell 130
Rod 14, and can improve the operating efficiency for mixing the wing 16 with the neighbouring 14 concyclic heart of fuel rod, the concyclic core structure.Based on the center of circle,
The radius of fuel rod 14 is less than the radius of segmental arc（It can be specifically the fit radius of segmental arc）, and difference is not more than 2mm.
Referring also to Fig. 3, in the fuel assembly of another example embodiment of the present utility model, it is additionally provided with band 131
Firm male member 18, firm male member 18 stretch into grid cell 130 and against the outer surfaces of fuel rod 14.Specifically, firm male member
18 include connected support sector 181 and butting section 182, and support sector 181 is the rigid element being connected with band 131, butting section 182
To stretch into grid cell 130 and against the elastomeric element of fuel rod 14.Surround four bands 131 of same grid cell 130
In at least two on be respectively equipped with firm male member 18, because firm male member 18 is used for against fuel rod 14, same grid cell 130
Multiple just male members 18 coordinate, there is approximate circle fitting contour line using the radius of fuel rod 14 as radius（Do not show in figure
Go out）, this it is approximate circle fitting contour line and fuel rod 14 outer surface profile line essentially coincide.
In the fuel assembly of another example embodiment of the present utility model, band is integrated punch forming with mixing the wing
Structure, and mix the wing and also include post forming part.Specifically, the wing is mixed as shown in figure 4, this, which mixes the wing 26, includes Part I
261 and Part II 262, Part II 262 is in grid cell closer to fuel rod, Part I 261 and Part II 262
Between the not physical presence of boundary line 263, only statement is convenient and define, and Part I 261 is whole for one with Part II 262
Body.Relatively small compared with existing gap because gap is not more than 2mm, the area for mixing the wing 26 compares existing routine
Mix this area that the area of the wing is big, and the expression of definable Part II 262 increases.Further, leaned in Part II 262
The outline 26a of nearly fuel rod be post forming part, and other outlines 26b is is integrally formed part with band.
Referring to Fig. 5, assembling the method for above-mentioned fuel assembly includes：Step S100, punching band and taken in bar preforming
Mix the wing；Step S200, band is assembled to form the screen work with some grid cells；Step S300, on screen work it is secondary into
Type mixes the wing；And step S400, along longitudinal direction load fuel rod in grid cell.
In above-mentioned assembly method, it can use conventional method for punching is only preforming while punching band to mix the wing,
High-precision preparation method can be then used to mix the wing to preforming wing progress post forming of mixing to shape, in post forming
During mixing the wing, improved because preparing precision, reduce dimensional tolerance and influence that build-up tolerance is brought, so as in safety
Performance is corresponding on the basis of being protected to increase the area for mixing the wing, reduces the gap length mixed between the wing and fuel rod.Stir
After area increase of the mixed wing in grid cell, caused lateral flow enhancing, so as to be carried to effect caused by coolant fluid
It is high；Meanwhile gap is reduced and to mix the wing relatively closer to fuel rod, so as to effectively destroy fuel rod table near fuel rod
The fluid layer in face, mix effect enhancing.
Though step S200 and S400 is not described in detail herein, one of ordinary skill in the art can reasonable employment it is existing
Method implementation steps S200 and S400 arbitrarily suitable in technology, are repeated no more in literary.It should know, it is any to be based on this reality
The technical scheme formed with new teaching, within the scope of protection of the utility model.
In another assembly method of fuel assembly, for step S100, while punching band one punching formed and stirred
The mixed wing, it is preforming to mix the wing and band is structure as a whole, it is connected so as to remain to keep to mix the wing with the stabilization of band, avoids stirring
The mixed wing takes from bar to come off.
In another assembly method of fuel assembly, for step S300, the wing of mixing preforming in S100 can be carried out
Cutting, the wing is mixed with post forming, so as to which the final shaping mixes the wing.It is a variety of that the cutting mode includes laser cutting, wire cutting etc.
Contactless cutting or soft contact mode, the final molding of the wing is mixed by setting cutting path realization.Using being easy to focus on
Cutting mode carry out post forming, can improve mix the wing sizing precision；In addition, cutting path can easily be accommodated, can be achieved to cut simultaneously
Cut it is multiple mix the wing, so as to improve production efficiency.At the same time, the heat affected area in cutting process is to mixing the final molding of the wing
Influence less, in tolerance interval.
For example, can use laser cutting post forming mix the wing, further, can also use laser cutting simultaneously it is secondary into
Type is multiple to mix the wing.Generally, the wing can be mixed by the multiple grid cells of post forming using laser cutting simultaneously, fuel rod is along longitudinal direction
Sequentially pass through the plurality of grid cell, you can mix the wing along multiple on the same longitudinal direction of longitudinal direction cutting simultaneously.
In an example assembly method of fuel assembly, in step S300, it is first determined fuel rod to be set in grid cell
Home position, and the bar for cutting using this center of circle as axle center, by axle of the length more than fuel rod radius the grid cell takes
Preforming mix the wing.Can be radius using the radius of fuel rod to same grid if the bar of screen work is taken provided with firm male member
Multiple just male members in unit do circular fit contour line, and the center of circle of the circular fit contour line is with the fuel rod loaded
The center of circle.
Referring specifically to Fig. 6, the wing 160a that mixes that bar takes pre-setting includes Part I 161a and Part II 162a, the
Two part 162a are relative closer to the fuel rod that will subsequently load.In step S300, to there is the center of circle for the fuel rod being housed to
Position is axle center, using the length more than fuel rod radius as axle, and that pre-setting is cut by the way of picture circle mixes wing 160a, goes
Except Part II 162a, so as to which obtain the final shaping mixes the wing.The radius of drawn circle is more than the radius of fuel rod to be set, such as
The length difference of two radiuses is not more than 2mm, and line of cut 163a is a fan-shaped section of drawn circle, alternatively referred to as segmental arc, and this is cut
Secant 163a and load after fuel rod outer surface between gap be the above-mentioned gap 17 mixed between the wing and fuel rod.Thus
The outline for mixing the wing obtained includes first paragraph and second segment, and first paragraph is that the contour segment obtained is cut along line of cut 163a,
Second segment is other contour segments in addition to first paragraph, first paragraph in the grid cell where mixing the wing closer to fuel rod,
And first paragraph is arc or sector, and with the concyclic heart of fuel rod adjoining in the grid cell, using the concentric structure, can show
Write the efficiency that the wing is mixed in lifting.
The structure for mixing wing 160a of pre-setting shown in Fig. 6 is used only as illustrating, be not to limitation of the present utility model,
One of ordinary skill in the art can be based on teaching of the present utility model, select to appoint for convenience of fuel rod is loaded into grid cell
The structure for mixing the wing of the suitable pre-setting of meaning, will not enumerate herein.It is predetermined it illustrates another kind for example, with reference to Fig. 7
The structure for mixing wing 160b of type, the wing 160b that mixes of the pre-setting include Part I 161b and Part II 162b, and second
Part 162b is relative closer to fuel rod, and the separator bar 163b between Part I 161b and Part II 162b is step S300
In line of cut.
In another specific assembly method of fuel assembly, mixing the outline of the wing includes first paragraph and second segment, one
In individual grid cell, first paragraph is relative closer to fuel rod, and the gap between first paragraph and fuel rod outer surface is stirred to be above-mentioned
Mixed gap 17 between the wing and fuel rod.For step S100, during pre-setting mixes the wing, sizing mixes the second of the wing
Section, and pre-setting first paragraph；For step S300, during the wing is mixed in post forming, the first paragraph of shaping is final fixed
Type entirely mixes the wing.So, band and mix the wing and be integrated punch forming structure, and mix the wing also to include post forming part,
The part of the post forming is above-mentioned first paragraph.
It should be understood that above example only expresses preferred embodiment of the present utility model, its description is more specific
With it is detailed, but can not therefore and be interpreted as the limitation to the utility model patent scope；It should be pointed out that for this area
Those of ordinary skill for, without departing from the concept of the premise utility, can to above-mentioned technical characterstic carry out freely
Combination, various modifications and improvements can be made, these belong to the scope of protection of the utility model；Therefore, it is all with this practicality
The equivalents and modification that new right is done, the covering scope of the utility model claims all should be belonged to.
Claims (10)
1. a kind of screen work for fuel assembly, the screen work includes multiple bands, the band intersect each other cooperatively form it is more
The individual grid cell for being used to lay fuel rod, surrounds and is set respectively at least two in four bands of the same grid cell
The wing is mixed, is further respectively had at least two in four bands for the firm convex structure against the fuel rod outer surface
Part, it is characterised in that the firm male member of the same grid cell has the approximation circle using the radius of the fuel rod as radius
Shape is fitted contour line, and the wing outline neighbouring with the approximate circle fitting contour line is approximate with this justifies for mixing in the grid cell
Gap between shape fitting contour line is not more than 2mm.
2. screen work according to claim 1, it is characterised in that the just male member include connected support sector and against
Portion, the support sector are the rigid element being connected with the band, and the butting section is the elasticity stretched into the grid cell
Part.
3. screen work according to claim 1, it is characterised in that the outline for mixing the wing includes first paragraph and second
Section, the first paragraph is segmental arc；In a grid cell, the first paragraph is adjacent to the approximate circle fitting profile
Line and with this it is approximate circle fitting the concyclic heart of contour line.
4. a kind of fuel assembly, including screen work and along the longitudinally mounted fuel rod in the screen work；The screen work includes more
Individual band, the band, which intersects each other, cooperatively forms multiple grid cells, and the fuel rod is correspondingly located in the grid cell,
Characterized in that, the bar, which takes to be additionally provided with, mixes the wing, it is described to mix the wing and the neighbouring outline of the fuel rod and the combustion
Gap between charge bar is not more than 2mm.
5. fuel assembly according to claim 4, it is characterised in that the outline for mixing the wing includes first paragraph and the
Two sections, the first paragraph is segmental arc；The first paragraph is adjacent to the fuel rod in a grid cell, and with it is neighbouring
The concyclic heart of the fuel rod.
6. fuel assembly according to claim 5, it is characterised in that based on the center of circle, the radius of the fuel rod is small
In the radius of the segmental arc, and difference is not more than 2mm.
7. fuel assembly according to claim 4, it is characterised in that the bar, which takes, is additionally provided with firm male member, described firm
Male member stretches into the grid cell and against the outer surface of the fuel rod.
8. fuel assembly according to claim 7, it is characterised in that the just male member includes connected support sector and supported
Relying part, the support sector are the rigid element being connected with the band, and the butting section is to stretch into the grid cell and support
By the elastomeric element of the fuel rod.
9. fuel assembly according to claim 7, it is characterised in that in four bands for surrounding the same grid cell
At least two on be respectively equipped with the firm male member, the firm male member of the same grid cell is with the radius of the fuel rod
Outer surface profile line for the approximate circle fitting contour line and the fuel rod of radius essentially coincides.
10. fuel assembly according to claim 4, it is characterised in that the band is integrated punching with the wing of mixing
Molding structure, and the wing of mixing also includes post forming part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720572949.8U CN206849509U (en) | 2017-05-22 | 2017-05-22 | Fuel assembly and the screen work for fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720572949.8U CN206849509U (en) | 2017-05-22 | 2017-05-22 | Fuel assembly and the screen work for fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206849509U true CN206849509U (en) | 2018-01-05 |
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ID=60796966
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720572949.8U Active CN206849509U (en) | 2017-05-22 | 2017-05-22 | Fuel assembly and the screen work for fuel assembly |
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| CN (1) | CN206849509U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018214006A1 (en) * | 2017-05-22 | 2018-11-29 | 岭东核电有限公司 | Fuel assembly and method for assembling same |
| CN111540481A (en) * | 2020-05-14 | 2020-08-14 | 吉林农业大学 | Stirring grid work based on additive manufacturing process |
| CN112071443A (en) * | 2020-08-26 | 2020-12-11 | 西安交通大学 | Nuclear fuel assembly spacer grid based on 3D prints |
-
2017
- 2017-05-22 CN CN201720572949.8U patent/CN206849509U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018214006A1 (en) * | 2017-05-22 | 2018-11-29 | 岭东核电有限公司 | Fuel assembly and method for assembling same |
| CN111540481A (en) * | 2020-05-14 | 2020-08-14 | 吉林农业大学 | Stirring grid work based on additive manufacturing process |
| CN112071443A (en) * | 2020-08-26 | 2020-12-11 | 西安交通大学 | Nuclear fuel assembly spacer grid based on 3D prints |
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