CN109935359A - A kind of fuel assembly skeleton connection structure and fuel assembly skeleton - Google Patents
A kind of fuel assembly skeleton connection structure and fuel assembly skeleton Download PDFInfo
- Publication number
- CN109935359A CN109935359A CN201711369478.1A CN201711369478A CN109935359A CN 109935359 A CN109935359 A CN 109935359A CN 201711369478 A CN201711369478 A CN 201711369478A CN 109935359 A CN109935359 A CN 109935359A
- Authority
- CN
- China
- Prior art keywords
- plug
- guide pipe
- fuel assembly
- assembly skeleton
- connection structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 51
- 125000006850 spacer group Chemical group 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 6
- 229910000679 solder Inorganic materials 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
Classifications
-
- 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 belongs to fuel assembly technical fields, and in particular to a kind of fuel assembly skeleton connection structure and fuel assembly skeleton.In skeleton connection structure of the invention, guide pipe is through in locating grid cell, using connection type contact, formation one stationary structure between guide pipe and locating grid cell；In fuel assembly skeleton of the invention, the lattice cell of grid spacer is in four sides cylinder, is respectively equipped with upper slot on four faces of lattice cell, and for cooperating plug-in unit grafting, plug-in unit includes clamping part and plug division, and clamping part is to lattice cell inner bulge.The present invention can effectively prevent guide pipe to fall off and loosen, and improve the life cycle and operation stability of guide pipe.
Description
Technical field
The invention belongs to fuel assembly technical fields, and in particular to a kind of fuel assembly skeleton connection structure and fuel assembly
Skeleton.
Background technique
Fuel assembly is the core component that heat is generated in nuclear reactor, the safety of its design relation to nuclear reactor
Property, reliability and economy.
Guide pipe, grid spacer, upper tube socket and bottom nozzle in fuel assembly form fuel assembly skeleton: several guiding
Pipe be applied in the lattice cell of grid spacer from top to bottom, the upper end of guide pipe is fixedly connected with upper tube socket, the lower end of guide pipe and
Bottom nozzle is fixedly connected.
In the prior art, the method for generalling use accurate control locating grid cell size and guide pipe outer wall dimension, makes
Guide pipe is stuck in locating grid cell, and realization guide pipe is fixedly connected with grid spacer.This defect being fixedly connected is
The loosening of guide pipe is easily led to, and guiding tube outer surface is caused to wear, influences guide pipe life cycle and operation stability.
Summary of the invention
The technical problem to be solved in the invention are as follows: the side of being fixedly connected of guide pipe and grid spacer in the prior art
Formula, easily leads to the loosening of guide pipe, and causes to wear to guiding tube outer surface, influences guide pipe life cycle and stable
Property.
It is described that technical scheme is as follows:
A kind of fuel assembly skeleton connection structure, guide pipe is through in locating grid cell, guide pipe and grid spacer
Using the connection type of welding contact between lattice cell, integrated stationary structure is formed.
As a preferred solution: being in nested cannula outside guide pipe in grid spacer: being between described sleeve pipe and guide pipe
It is welded and fixed or expanded joint is fixed；It uses and is welded and fixed between described sleeve pipe and grid spacer.Scheme as a further preference: institute
Casing and grid spacer are stated in face contact, contact portion is used and is welded and fixed.
As a preferred solution: further including two metal rings, two round metal ring sets are located at and pass through on the outside of guide pipe
It is installed with the upper surface and lower end surface of the locating grid cell of guide pipe, the outer diameter of metal ring is greater than locating grid cell hole
Guide pipe is stuck in locating grid cell by diameter, i.e. two metal rings.
As a preferred solution: fin is arranged in locating grid cell upper and lower end face inner wall, by the fin and it is applied in calmly
Guiding pipe outer wall in the screen work lattice cell of position is welded to connect.
As a preferred solution: being attached in such a way that spot welding is fixed between guide pipe and locating grid cell.Make
For further preferred embodiment: for each side of locating grid cell, be all made of two it is symmetrical relative to guide pipe
Solder joint be welded to connect with the guiding pipe outer wall that is in contact.
As a preferred solution: being connected in such a way that bar shaped is welded and fixed between guide pipe and locating grid cell
It connects.
A kind of fuel assembly skeleton, including guide pipe, grid spacer, upper tube socket and bottom nozzle, several guide pipes are from upper
It is applied under and in the lattice cell of grid spacer, the upper end of guide pipe is fixedly connected with upper tube socket, the lower end of guide pipe and bottom nozzle
Be fixedly connected: guide pipe and grid spacer directly adopt any one of the above fuel assembly skeleton connection structure；Grid spacer
Lattice cell is in four sides cylinder, is respectively equipped with upper slot on four faces of lattice cell, for cooperating plug-in unit grafting, plug-in unit includes clamping part
And plug division, clamping part is to lattice cell inner bulge.
As a preferred solution: the plug-in unit is angle plug-in unit comprising a clamping part and two plug divisions, two of them
Plug division is orthogonal, and clamping part is set between two plug divisions.
As a preferred solution: the plug-in unit is side plug-in unit comprising two clamping parts and three plug divisions, three grafting
At T-shaped, clamping part is respectively arranged between every two plug division at position at right angle in portion.
As a preferred solution: the plug-in unit is channel card comprising three clamping parts and four plug divisions, four are inserted
Socket part across, clamping part are set between every two plug division.
As a preferred solution: the plug-in unit is intermediate plug-in unit comprising four clamping parts and four plug divisions, four are inserted
Socket part across, clamping part are set between every two plug division.
The invention has the benefit that
(1) fuel assembly skeleton connection structure of the invention can using being welded to connect between grid spacer and guide pipe
It effectively prevent guide pipe to fall off and loosen；
(2) fuel assembly skeleton connection structure of the invention can be greatly decreased grid spacer and cause to guiding pipe outer wall
Abrasion, effectively increase the life cycle and operation stability of guide pipe；
(3) fuel assembly skeleton connection structure of the invention, casing and grid spacer in embodiment 3 are in face contact, greatly
Width increases contact area, further improves connection reliability；
(4) fuel assembly skeleton of the invention, the design of grid spacer are applicable not only to common rod shape fuel component, also
There is the fuel element of larger outer diameter suitable for such as annular fuel element etc., coolant and fuel element can be made more fully
Contact provides located lateral to fuel element and generates certain effect of mixing to coolant；
(5) fuel assembly skeleton of the invention is clamped and is supported to fuel element using plug-in unit, and overall stiffness is significant
Enhancing, and the processing program at spacer grid supporting position is simplified, reduce difficulty of processing；
(6) fuel assembly skeleton of the invention is equipped with gap between plug-in unit plug division side and lattice cell side, so that clamping
The clamping force value range in portion increases, and can adapt to the work requirements under different situations；
(7) fuel assembly skeleton of the invention, can be to avoid the xenogenesis material when lattice cell and plug-in unit are using not same material
Expect Welding Problems.
Detailed description of the invention
Fig. 1 is the fuel assembly skeleton attachment structure schematic diagram in embodiment 1；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the fuel assembly skeleton attachment structure schematic diagram in embodiment 2；
Fig. 4 is grid spacer structural schematic diagram；
Fig. 5 is angle plug-in unit intention；
Fig. 6 is side plug-in unit schematic diagram；
Fig. 7 is intermediate plug-in unit schematic diagram.
In figure, 1- locating grid cell, 2- guide pipe, 3- solder joint, 4- clamping part, the plug division 5-, the angle 6- plug-in unit, the side 7- is inserted
Part, 8- channel card, the centre 9- plug-in unit, 10- plug-in unit, the outer band of 11-, 12- guide vane, 13- are oriented to tube passage.
Specific embodiment
Fuel assembly skeleton connection structure of the invention is described in detail with reference to the accompanying drawings and examples.
Fuel assembly skeleton connection structure of the invention, using the company contacted between guide pipe 2 and locating grid cell 1
Mode is connect, integrated stationary structure is formed.
Embodiment 1
Existing locating grid cell 1 is commonly polygonal structure, such as hexagon lattice cell and quadrangle grid shown in Fig. 2
Member.For being fixed using spot welding between guide pipe 2 and locating grid cell 1 through the locating grid cell 1 for having guide pipe 2
Mode be attached.For example, for each side of locating grid cell 1, it is all made of two solder joints 3 and the guiding that is in contact
2 outer wall of pipe is welded to connect, preferably, two solder joints 3 on 1 each side of locating grid cell, relative to leading
Symmetrical to pipe 2, this design can further prevent guide pipe 2 to fall off and loosen.
Embodiment 2
Fuel assembly skeleton connection structure in the present embodiment is in 2 outside nested cannula of guide pipe in grid spacer.Institute
Stating can be to be welded and fixed between casing and guide pipe 2, or expanded joint is fixed；Described sleeve pipe and grid spacer connect in face
Touching, contact portion are used and are welded and fixed.
Embodiment 3
Skeleton connection structure in the present embodiment, including two metal rings.Two round metal ring sets are outside guide pipe 2
Side is located at through the upper surface and lower end surface of the locating grid cell 1 for having guide pipe 2, and the outer diameter of metal ring omits
Greater than 1 aperture of locating grid cell, i.e. guide pipe 2 is stuck in locating grid cell 1 by two metal rings, realizes guide pipe 2
With the connection of grid spacer.
Embodiment 4
Fin is arranged in 1 upper and lower end face inner wall of locating grid cell, by by institute in skeleton connection structure in the present embodiment
The mode stating fin and welding together with 2 outer wall of guide pipe that is applied in locating grid cell 1, realizes guide pipe 2 and positioning
The connection of screen work.
Embodiment 5
For using bar shaped between guide pipe 2 and locating grid cell 1 through the locating grid cell 1 for having guide pipe 2
The mode of welding is attached.
Embodiment 6
One of the present embodiment fuel assembly skeleton, including guide pipe 2, grid spacer, upper tube socket and bottom nozzle, it is several
Root guide pipe 2 is applied in from top to bottom in the lattice cell of grid spacer, and the upper end of guide pipe 2 is fixedly connected with upper tube socket, guide pipe 2
Lower end be fixedly connected with bottom nozzle.It is any one into embodiment 5 that the guide pipe 2 with grid spacer directlys adopt embodiment 1
Kind fuel assembly skeleton connection structure；The lattice cell 1 of the grid spacer is in four sides cylinder, is set respectively on four faces of lattice cell 1
There is upper slot, for cooperating 10 grafting of plug-in unit, plug-in unit 10 includes clamping part 4 and plug division 5, and clamping part 4 is convex to 1 inside of lattice cell
It rises.
The plug-in unit 10 includes angle plug-in unit 6, side plug-in unit 7, channel card 8 and intermediate plug-in unit 9.Angle plug-in unit 6 includes a folder
Portion 4 and two plug divisions 5 are held, two of them plug division 5 is orthogonal, and clamping part 4 is set between two plug divisions 5.Side plug-in unit 7
Including two clamping parts 4 and three plug divisions 5, at T-shaped, clamping part 4 is respectively arranged on every two plug division 5 for three plug divisions 5
Between at position at right angle.Channel card 8 include three clamping parts 4 and four plug divisions 5, four 5 across of plug division,
Clamping part 4 is set between every two plug division 5.Intermediate plug-in unit 9 includes four clamping parts 4 and four plug divisions 5, four plug divisions
5 across, clamping part 4 are set between every two plug division 5.
Claims (13)
1. a kind of fuel assembly skeleton connection structure, guide pipe (2) is through in locating grid cell (1), it is characterised in that: leads
To the connection type contacted is used between pipe (2) and locating grid cell (1), integrated stationary structure is formed.
2. fuel assembly skeleton connection structure according to claim 1, it is characterised in that: be in guide pipe in grid spacer
(2) external nested cannula: being to be welded and fixed or expanded joint is fixed between described sleeve pipe and guide pipe (2)；Described sleeve pipe and positioning lattice
It uses and is welded and fixed between frame.
3. fuel assembly skeleton connection structure according to claim 2, it is characterised in that: described sleeve pipe is in grid spacer
Face contact, contact portion are used and are welded and fixed.
4. fuel assembly skeleton connection structure according to claim 1, it is characterised in that: it further include two metal rings,
Two round metal ring sets are located on the outside of guide pipe (2) through the upper end for the locating grid cell (1) for having guide pipe (2)
Face and lower end surface, the outer diameter of metal ring are greater than locating grid cell (1) aperture, i.e. two metal rings are by guide pipe
(2) it is inner to be stuck in locating grid cell (1).
5. fuel assembly skeleton connection structure according to claim 1, it is characterised in that: in locating grid cell upper and lower side
Fin is arranged in face (1) inner wall, and the fin is welded to connect with guide pipe (2) outer wall being applied in locating grid cell (1).
6. fuel assembly skeleton connection structure according to claim 1, it is characterised in that: in guide pipe (2) and positioning lattice
Frame lattice cell is attached in such a way that bar shaped is welded and fixed between (1).
7. fuel assembly skeleton connection structure according to claim 6, it is characterised in that: for locating grid cell (1)
Each side, be all made of two solder joints (3) symmetrical relative to guide pipe (2) and guide pipe (2) outer wall for being in contact
It is welded to connect.
8. fuel assembly skeleton connection structure according to claim 1, it is characterised in that: in guide pipe (2) and positioning lattice
It is attached in such a way that solid welding is fixed between frame lattice cell (1).
9. a kind of fuel assembly skeleton, including guide pipe (2), grid spacer, upper tube socket and bottom nozzle, several guide pipes (2)
It is applied in the lattice cell of grid spacer from top to bottom, the upper end of guide pipe (2) is fixedly connected with upper tube socket, under guide pipe (2)
End is fixedly connected with bottom nozzle, it is characterised in that:
The guide pipe (2) and grid spacer directly adopt any one fuel assembly skeleton in claim 1 to claim 8
Connection structure；
The lattice cell of the grid spacer is in four sides cylinder, upper slot is respectively equipped on four faces of lattice cell, for cooperating plug-in unit
Grafting, plug-in unit include clamping part and plug division, and clamping part is to lattice cell inner bulge.
10. a kind of fuel assembly skeleton according to claim 9, it is characterised in that: the plug-in unit is angle plug-in unit, packet
A clamping part and two plug divisions are included, two of them plug division is orthogonal, and clamping part is set between two plug divisions.
11. a kind of fuel assembly skeleton according to claim 9, it is characterised in that: the plug-in unit is side plug-in unit, packet
Include two clamping parts and three plug divisions, at T-shaped, clamping part is respectively arranged on Cheng Zhi between every two plug division for three plug divisions
At the position at angle.
12. a kind of fuel assembly skeleton according to claim 9, it is characterised in that: the plug-in unit is channel card,
Including three clamping parts and four plug divisions, four plug division across, clamping part is set between every two plug division.
13. a kind of fuel assembly skeleton according to claim 9, it is characterised in that: the plug-in unit is intermediate plug-in unit,
Including four clamping parts and four plug divisions, four plug division across, clamping part is set between every two plug division.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369478.1A CN109935359A (en) | 2017-12-19 | 2017-12-19 | A kind of fuel assembly skeleton connection structure and fuel assembly skeleton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369478.1A CN109935359A (en) | 2017-12-19 | 2017-12-19 | A kind of fuel assembly skeleton connection structure and fuel assembly skeleton |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109935359A true CN109935359A (en) | 2019-06-25 |
Family
ID=66983049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711369478.1A Pending CN109935359A (en) | 2017-12-19 | 2017-12-19 | A kind of fuel assembly skeleton connection structure and fuel assembly skeleton |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109935359A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1238143A (en) * | 1969-05-19 | 1971-07-07 | ||
| US4137125A (en) * | 1976-11-12 | 1979-01-30 | Westinghouse Electric Corp. | Method of welding nuclear reactor fuel assemblies |
| FR2495368A1 (en) * | 1980-12-03 | 1982-06-04 | Combustion Eng | Nuclear fuel rod assembly - where some zirconium alloy components are replaced by stainless steel parts to achieve savings in cost |
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| US6519309B1 (en) * | 2000-06-29 | 2003-02-11 | Framatone Anp Inc. | Pressurized water reactor fuel assembly spacer grid |
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| CN102270511A (en) * | 2011-07-18 | 2011-12-07 | 中国原子能科学研究院 | Tubular positioning grid for pressurized water reactor double-sided cooling fuel rod |
| CN102760498A (en) * | 2012-07-18 | 2012-10-31 | 中国核动力研究设计院 | Positioning trellis with hooking risk reduction function for nuclear fuel component |
| US20140029713A1 (en) * | 2008-01-15 | 2014-01-30 | Westinghouse Electric Co. Llc | Nuclear reactor fuel assembly |
| EP2741297A1 (en) * | 2012-12-04 | 2014-06-11 | Areva NP | Fuel rod support insert for a nuclear fuel assembly spacer grid, spacer grid and nuclear fuel assembly |
| CN207690512U (en) * | 2017-12-19 | 2018-08-03 | 中国原子能科学研究院 | A kind of fuel assembly skeleton connection structure and fuel assembly skeleton |
-
2017
- 2017-12-19 CN CN201711369478.1A patent/CN109935359A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1238143A (en) * | 1969-05-19 | 1971-07-07 | ||
| US4137125A (en) * | 1976-11-12 | 1979-01-30 | Westinghouse Electric Corp. | Method of welding nuclear reactor fuel assemblies |
| FR2495368A1 (en) * | 1980-12-03 | 1982-06-04 | Combustion Eng | Nuclear fuel rod assembly - where some zirconium alloy components are replaced by stainless steel parts to achieve savings in cost |
| CN86102224A (en) * | 1985-04-02 | 1986-11-26 | 西屋电气公司 | Nuclear reactor spacer grid |
| CN1147989A (en) * | 1995-06-29 | 1997-04-23 | 弗朗哥-贝尔格燃料制造公司 | Method and device for welding interlaced straps of spacer grid of fuel assembly via exterior of the grid |
| JP2000039487A (en) * | 1998-07-22 | 2000-02-08 | Mitsubishi Heavy Ind Ltd | Skeleton structure for atomic reactor fuel assembly |
| US6519309B1 (en) * | 2000-06-29 | 2003-02-11 | Framatone Anp Inc. | Pressurized water reactor fuel assembly spacer grid |
| CN1411002A (en) * | 2001-09-28 | 2003-04-16 | 中国核动力研究设计院 | Low pressure loss span mixing grillwork |
| US20060045231A1 (en) * | 2004-09-02 | 2006-03-02 | Lee Yu C | Nuclear fuel assembly protective grid |
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| US20140029713A1 (en) * | 2008-01-15 | 2014-01-30 | Westinghouse Electric Co. Llc | Nuclear reactor fuel assembly |
| KR100967119B1 (en) * | 2009-01-23 | 2010-07-05 | 한국원자력연구원 | Space grid having pipe-shaped springs which are inserted into interior grid intersection regions |
| CN102270511A (en) * | 2011-07-18 | 2011-12-07 | 中国原子能科学研究院 | Tubular positioning grid for pressurized water reactor double-sided cooling fuel rod |
| CN102760498A (en) * | 2012-07-18 | 2012-10-31 | 中国核动力研究设计院 | Positioning trellis with hooking risk reduction function for nuclear fuel component |
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