CN207558439U - A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit - Google Patents
A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit Download PDFInfo
- Publication number
- CN207558439U CN207558439U CN201721772764.8U CN201721772764U CN207558439U CN 207558439 U CN207558439 U CN 207558439U CN 201721772764 U CN201721772764 U CN 201721772764U CN 207558439 U CN207558439 U CN 207558439U
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- CN
- China
- Prior art keywords
- plug
- unit
- fuel assembly
- lattice cell
- spacer grid
- 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.)
- Expired - Fee Related
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Classifications
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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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- Fuel Cell (AREA)
Abstract
The utility model is related to fuel assembly technical fields, specifically disclose a kind of spacer grid of fuel assembly and fuel assembly with plug-in unit, and the grid spacer is rearranged two-by-two by lattice cell；The lattice cell is four sides cylinder, and slot is respectively equipped on four faces of lattice cell, for coordinating grafting with plug-in unit.The fuel assembly includes upper tube socket, annular fuel element, bottom nozzle, guide pipe, gauge pipe and the grid spacer.The utility model grid spacer can be suitable for annular fuel element, provide fuel element located lateral and certain effect of mixing is generated to cooling agent.In addition, the utility model grid spacer is clamped and supported to fuel element using plug-in unit, overall stiffness significantly increases, and simplifies the processing program at spacer grid supporting position, reduces difficulty of processing.
Description
Technical field
The utility model belongs to fuel assembly technical field, and in particular to a kind of spacer grid of fuel assembly with plug-in unit and
Fuel assembly.
Background technology
In nuclear power plant reactor operational process, the performance of nuclear fuel be influence nuclear reactor safety and economy it is important because
Element.Therefore the research of fuel element is placed on very prominent status always in the world, is designed, used by optimizing fuel element
Advanced configuration material improves the methods of component manufacturing process, and the various performances of nuclear fuel element are continuously improved, promote nuclear power to more
Safe and more economical direction is developed.
In the design of existing PWR fuel assembly, fuel rod is generally in a manner that grid spacer clamping is hanging.Positioning
Screen work plays a part of fuel element support clamping, and needs to resist the gravity of fuel element, due to the effect of irradiation,
Clamp fuel rod spring or it is just convex can relax, its corresponding chucking power can strongly reduce, and fuel rod can be generally fallen in bottom nozzle
On, under the mobilization of cooling agent, fuel rod may upper and lower play, this can lead to the risk of fuel rod breakage.
To optimize the parameter of fuel element, and use general fuel assembly form construction design so that novel component
It can be suitable for current ripe reactor core.Such as using novel annular fuel element, outer diameter becomes larger, and weight increases, at this time
The chucking power of required grid spacer may increase about 2-4 times, can place such as spring, the space of firm convex clamping piece has become ten
Point narrow, this causes fuel element to fall the probability increase on bottom nozzle at runtime, and to open heap again after cold-refueling
During fuel element the probability of play also increases up and down.
Meanwhile in the design and manufacture of existing spacer grid of fuel assembly, grid spacer is all made of substantially inside and outside band.
Due to the complexity of its band, 30 multiple kinds of molds are needed when manufacturing.After mold determines, to change grid spacer
Characteristic, such as the chucking power size that grid spacer is capable of providing are needed to change the shape of wherein nearly all mold, be increased
Work load is added.
Therefore, there is an urgent need for designing a kind of novel spacer grid of fuel assembly, with overcome the deficiencies in the prior art.
Invention content
The purpose of this utility model is to provide a kind of spacer grid of fuel assembly with plug-in unit, can clamp annular fuel
Element and the fuel assembly for including above-mentioned grid spacer.
The technical solution of the utility model is as follows：
A kind of spacer grid of fuel assembly with plug-in unit, the grid spacer are rearranged two-by-two by lattice cell；
The lattice cell is four sides cylinder, and slot is respectively equipped on four faces of lattice cell, for being inserted with plug-in unit cooperation
It connects.
There are four types of the plug-in units, and respectively angle plug-in unit, side plug-in unit, channel card and intermediate plug-in unit, each plug-in unit wrap
Include clamping part and plug division.
The clamping part is to lattice cell inner bulge.
The angle plug-in unit includes a clamping part and two plug divisions, and two of which plug division is orthogonal, clamping part
Between two plug divisions.
The side plug-in unit includes two clamping parts and three plug divisions, and into T-shaped, clamping part is set respectively for three plug divisions
Between each two plug division at position at a right angle.
The channel card includes three clamping parts and four plug divisions, four plug division across, and clamping part is set
Between each two plug division.
The intermediate plug-in unit includes four clamping parts and four plug divisions, four plug division across, and clamping part is set
Between each two plug division.
The angle plug-in unit be set on arranged two-by-two by lattice cell on four angles of structure.
The side plug-in unit be set on arranged two-by-two by lattice cell on the four edges of structure.
The intermediate plug-in unit be set on arranged two-by-two by lattice cell into the inside of structure.
It is equipped with lower slot on the top of the plug division, the upper slot grafting with lattice cell, the side of plug division and lattice cell
Gap is equipped between side.
It is equipped with lower slot on the top of the plug division, the upper slot grafting with lattice cell, the side of plug division and lattice cell
Side connects.
The top of the plug division is set in the upper slot of lattice cell, between being equipped between the side of plug division and the side of lattice cell
Gap.
The top of the plug division is set in the upper slot of lattice cell, and the side of plug division connects with the side of lattice cell.
The lattice cell connects two-by-two, forms the arrangement of N × N.
The value range of the N is 3~17.
The value of N is one in 5,9,13,15.
A lattice cell during lattice cell is arranged takes out, and the position of lattice cell vacancy is as guiding tube passage or instrument tube passage；
The channel card is set between the adjacent lattice cell of guide pipe channel circumference.
There are one the instrument tube passages, positioned at the center that lattice cell is arranged with N × N；Guiding tube passage has several
It is a, centered on instrument tube passage, it is symmetrically arranged.
Guide pipe, which is set on, to be oriented in tube passage, is welded and fixed with the barrel lateral surface of lattice cell.
The quantity, the position consistency that are oriented to tube passage and the guiding tube passage of upper tube socket.
Gauge pipe is set in instrument tube passage, is welded and fixed with the barrel lateral surface of lattice cell.
Outer band is equipped in the outside of lattice cell arrangement, the height of outer band is identical with the height of lattice cell.
Guide vane is equipped in the top edge and lower edge of outer band, prevents fuel assembly mutual hook when assembling
It hangs.
A kind of fuel assembly including upper tube socket, annular fuel element, bottom nozzle, guide pipe, gauge pipe, further includes described
Grid spacer.
Annular fuel element, guide pipe and the gauge pipe is inserted in grid spacer；Grid spacer have it is multiple, successively
It is axially disposed；The upper end of guide pipe and gauge pipe is fixedly connected with upper tube socket, and lower end is fixedly connected with bottom nozzle；
Bottom nozzle is inserted into the lower end of annular fuel element, is fixedly connected with bottom nozzle, when annular fuel element generates irradiation
During growth, expand upwards.
The beneficial effects of the utility model are：
(1) the utility model grid spacer can be suitable for the fuel element of bigger outer diameter, such as annular fuel element, to combustion
Expect that element provides located lateral and certain effect of mixing is generated to cooling agent.
(2) common rod shaped fuel element can also be applied in the utility model grid spacer, and can make cooling agent and combustion
Material element more fully contacts.
(3) the utility model grid spacer is clamped and is supported to fuel element using plug-in unit, and overall stiffness significantly increases
By force, and the processing program at spacer grid supporting position is simplified, reduces difficulty of processing.
(4) gap is equipped between the plug-in unit plug division side in the utility model and lattice cell side so that the folder of clamping part
The increase of active force value range is held, can adapt to the work requirements under different situations.
(5) the utility model grid spacer can weld to avoid the dissimilar material when lattice cell and plug-in unit are using not same material
Connect problem.
(6) the utility model fuel assembly is using multiple grid spacer clamping fuel elements axially set, to fuel member
Part is fixed, and keeps fuel element spacing so that and fuel element is located at fixed position in the reactor core of PWR nuclear power plant,
And guide pipe can be caused by cross-brace and positioning.
(7) the utility model fuel assembly uses fuel element lower end stationary structure, avoids hanging type fuel element
When being irradiated by the long period, grid spacer chucking power reduces, and fuel element is caused to fall.
Description of the drawings
Fig. 1 is grid spacer axonometric schematic diagram；
Fig. 2 is grid spacer vertical view；
Fig. 3 is intended to for angle plug-in unit；
Fig. 4 is side plug-in unit schematic diagram；
Fig. 5 is intermediate plug-in unit schematic diagram.
In figure：1. lattice cell；2. plug-in unit；3. clamping part；4. plug division；5. outer band；6. guide vane；7. it is oriented to tube passage；
8. jiao plug-in unit；9. side plug-in unit；10. channel card；11. intermediate plug-in unit.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail the utility model.
Embodiment one
As shown in Figure 1, 2, a kind of spacer grid of fuel assembly with plug-in unit, is rearranged two-by-two by lattice cell 1；
The lattice cell 1 is four sides cylinder, slot is respectively equipped on four faces of lattice cell 1, for coordinating with plug-in unit 2
Grafting.
As seen in figures 3-5, there are four types of the plug-in units 2, respectively angle plug-in unit 8, side plug-in unit 9, channel card 10 and centre
Plug-in unit 11, each plug-in unit 2 include clamping part 3 and plug division 4.The clamping part 3 is to 1 inner bulge of lattice cell.
The angle plug-in unit 8 includes a clamping part 3 and two plug divisions 4, and two of which plug division 4 is orthogonal, folder
Portion 3 is held between two plug divisions 4.The angle plug-in unit 8 be set on arranged two-by-two by lattice cell 1 on four angles of structure.
The side plug-in unit 9 includes two clamping parts 3 and three plug divisions 4, and three plug divisions 4 are into T-shaped, clamping part 3
It is respectively arranged at position at a right angle between each two plug division 4.The side plug-in unit 9 be set on arrange two-by-two by lattice cell 1 into
On the four edges of structure.
The channel card 10 includes three clamping parts 3 and four plug divisions 4, four 4 across of plug division, clamping
Portion 3 is set between each two plug division 4.The channel card 10, which is set on, to be oriented between the adjacent lattice cell 1 of tube passage 7.
The intermediate plug-in unit 11 includes four clamping parts 3 and four plug divisions 4, four 4 across of plug division, clamping
Portion 3 is set between each two plug division 4.The intermediate plug-in unit 11 be set on arranged two-by-two by lattice cell 1 into the inside of structure.
The top of the plug division 4 is set in the upper slot of lattice cell 1, is set between the side of plug division 4 and the side of lattice cell 1
There is gap.
The lattice cell 1 connects two-by-two, forms the arrangement of N × N, and the value range of N is 3~17, be preferably 5,9,13,
One in 15.
A lattice cell 1 during lattice cell is arranged takes out, and the position of 1 vacancy of lattice cell leads to as guiding tube passage 7 or gauge pipe
Road；
The channel card 10, which is set on, to be oriented between lattice cell 1 adjacent around tube passage 7.
There are one the instrument tube passages, positioned at the center that lattice cell 1 is arranged with N × N；If being oriented to tube passage 7 has
It dry, centered on instrument tube passage, is symmetrically arranged.
Guide pipe, which is set on, to be oriented in tube passage 7, is welded and fixed with the barrel lateral surface of lattice cell 1.
The quantity, the position consistency that are oriented to tube passage 7 and the guiding tube passage of upper tube socket.
Gauge pipe is set in instrument tube passage, is welded and fixed with the barrel lateral surface of lattice cell 1.
Outer band 5 is equipped in the outside that lattice cell 1 arranges, the height of outer band 5 is identical with the height of lattice cell 1.In outer band 5
Top edge and lower edge be equipped with guide vane 6, prevent fuel assembly assembling when hook mutually.
Embodiment two
The present embodiment and embodiment one the difference lies in：The top of the plug division 4 is set on the upper slot of lattice cell 1
Interior, the side of plug division 4 connects with the side of lattice cell 1.
Embodiment three
The present embodiment and embodiment one the difference lies in：Lower slot is equipped on the top of the plug division 4, with lattice cell
1 upper slot grafting is equipped with gap between the side of plug division 4 and the side of lattice cell 1.
Example IV
The present embodiment and embodiment one the difference lies in：Lower slot is equipped on the top of the plug division 4, with lattice cell
1 upper slot grafting, the side of plug division 4 connect with the side of lattice cell 1.
The utility model fuel assembly for nuclear reactor, including upper tube socket, annular fuel element, bottom nozzle, guide pipe, instrument
Grid spacer described in pipe and any of the above-described embodiment.
Annular fuel element, guide pipe and the gauge pipe is inserted in grid spacer；Grid spacer have it is multiple, successively
It is axially disposed；The upper end of guide pipe and gauge pipe is fixedly connected with upper tube socket, and lower end is fixedly connected with bottom nozzle；
Bottom nozzle is inserted into the lower end of annular fuel element, is fixedly connected with bottom nozzle, when annular fuel element generates irradiation
During growth, expand upwards.
The upper end of tube socket is provided with tube socket holddown spring and upper tube socket dowel hole on described.Upper tube socket holddown spring
There are four altogether, it is separately positioned on the four edges at the top of tube socket, for compressing fuel assembly.Upper tube socket dowel hole shares two
It is a, it is separately positioned on diagonal at the top of tube socket, by realizing the positioning to fuel assembly with bayonet fittings.
Guide pipe mounting hole, the first discharge orifice of bottom nozzle and the bottom nozzle of bottom nozzle are respectively arranged in the upper end of bottom nozzle
Second discharge orifice.The position of the guide pipe mounting hole of bottom nozzle is corresponding with the position of guide pipe, for fixed guide pipe, down tube
The first discharge orifice of seat and the second discharge orifice of bottom nozzle are used to pass through cooling agent.
The annular fuel element can keep or promote existing reactor safety abundant as a result of loop configuration
Under the premise of degree, reactor core output power density is substantially improved, hence it is evident that improve the economy of nuclear power.Under accidental conditions, annular
Fuel element bulk temperature is far below rod shaped fuel element；Under major accident operating mode, the temperature of annular fuel pellet is low, energy storage
The characteristics of few, can delay the process that fuel element cladding fails, for subsequent accident mitigation and emergency response provide preciousness when
Between, improve the inherent safety of PWR nuclear power plant.Annular fuel element can also reduce the flow resistance of component, reactor core
Resistance reduces, and can effectively reduce the output power of PWR nuclear power plant primary Ioops pump, promotes service life.
Claims (26)
1. a kind of spacer grid of fuel assembly with plug-in unit, it is characterised in that：The grid spacer is arranged two-by-two by lattice cell (1)
Composition；
The lattice cell (1) is four sides cylinder, upper slot is respectively equipped on four faces of lattice cell (1), for matching with plug-in unit (2)
Close grafting.
2. a kind of spacer grid of fuel assembly with plug-in unit as described in claim 1, it is characterised in that：The plug-in unit (2)
There are four types of, respectively angle plug-in unit (8), side plug-in unit (9), channel card (10) and intermediate plug-in unit (11), each plug-in unit (2) include
Clamping part (3) and plug division (4).
3. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 2, it is characterised in that：The clamping part
(3) to lattice cell (1) inner bulge.
4. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 3, it is characterised in that：The angle plug-in unit
(8) including a clamping part (3) and two plug divisions (4), two of which plug division (4) are orthogonal, and clamping part (3) is set on two
Between a plug division (4).
5. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 3, it is characterised in that：The side plug-in unit
(9) including two clamping parts (3) and three plug divisions (4), into T-shaped, clamping part (3) is respectively arranged on often three plug divisions (4)
Between two plug divisions (4) at position at a right angle.
6. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 3, it is characterised in that：The channel card
(10) including three clamping parts (3) and four plug divisions (4), four plug division (4) across, clamping part (3) is set on every two
Between a plug division (4).
7. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 3, it is characterised in that：The intermediate plug-in unit
(11) including four clamping parts (3) and four plug divisions (4), four plug division (4) across, clamping part (3) is set on every two
Between a plug division (4).
8. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 4, it is characterised in that：The angle plug-in unit
(8) set on arranged two-by-two by lattice cell (1) on four angles of structure.
9. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 5, it is characterised in that：The side plug-in unit
(9) set on arranged two-by-two by lattice cell (1) on the four edges of structure.
10. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 6, it is characterised in that：It is interleave in described
Part (11) set on arranged two-by-two by lattice cell (1) into the inside of structure.
11. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 3, it is characterised in that：In the plug division
(4) top is equipped with lower slot, the upper slot grafting with lattice cell (1), between the side of plug division (4) and the side of lattice cell (1)
Equipped with gap.
12. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 3, it is characterised in that：In the plug division
(4) top is equipped with lower slot, and the upper slot grafting with lattice cell (1), the side of plug division (4) connects with the side of lattice cell (1).
13. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 3, it is characterised in that：The plug division (4)
Top be set in the upper slot of lattice cell (1), equipped with gap between the side of plug division (4) and the side of lattice cell (1).
14. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 3, it is characterised in that：The plug division (4)
Top be set on lattice cell (1) upper slot in, the side of plug division (4) connects with the side of lattice cell (1).
15. a kind of spacer grid of fuel assembly with plug-in unit as described in any one of claim 1~14, it is characterised in that：
The lattice cell (1) connects two-by-two, forms the arrangement of N × N.
16. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 15, it is characterised in that：The value of the N
Ranging from 3~17.
17. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 16, it is characterised in that：The value of N for 5,
9th, one in 13,15.
18. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 15, it is characterised in that：During lattice cell is arranged
A lattice cell (1) take out, the position of lattice cell (1) vacancy is as being oriented to tube passage (7) or instrument tube passage；
Between the channel card (10) lattice cell (1) adjacent around guiding tube passage (7).
19. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 18, it is characterised in that：The gauge pipe
There are one channels, positioned at the center that lattice cell (1) is arranged with N × N；Being oriented to tube passage (7) has several, with instrument tube passage
Centered on, it is symmetrically arranged.
20. a kind of spacer grid of fuel assembly as claimed in claim 19, it is characterised in that：Guide pipe, which is set on, is oriented to tube passage
(7) it in, is welded and fixed with the barrel lateral surface of lattice cell (1).
21. a kind of spacer grid of fuel assembly as claimed in claim 20, it is characterised in that：The guiding tube passage (7)
With quantity, the position consistency of the guiding tube passage of upper tube socket.
22. a kind of spacer grid of fuel assembly as claimed in claim 21, it is characterised in that：Gauge pipe is set on instrument tube passage
It is interior, it is welded and fixed with the barrel lateral surface of lattice cell (1).
23. a kind of spacer grid of fuel assembly with plug-in unit as claimed in claim 22, it is characterised in that：It is arranged in lattice cell (1)
The outside of row is equipped with outer band (5), and the height of outer band (5) is identical with the height of lattice cell (1).
24. a kind of spacer grid of fuel assembly as claimed in claim 23, it is characterised in that：Top edge in outer band (5)
Guide vane (6) is equipped with lower edge, prevents fuel assembly from being hooked mutually when assembling.
25. a kind of fuel assembly, including upper tube socket, annular fuel element, bottom nozzle, guide pipe, gauge pipe, it is characterised in that：
It further includes such as claim 16~24 any one of them grid spacer.
26. a kind of fuel assembly as claimed in claim 25, it is characterised in that：The annular fuel element, guide pipe and
Gauge pipe is inserted in grid spacer；Grid spacer have it is multiple, it is axially disposed successively；The upper end of guide pipe and gauge pipe with it is upper
Tube socket is fixedly connected, and lower end is fixedly connected with bottom nozzle；
Bottom nozzle is inserted into the lower end of annular fuel element, is fixedly connected with bottom nozzle, when annular fuel element generates irradiation growth
When, it expands upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721772764.8U CN207558439U (en) | 2017-12-19 | 2017-12-19 | A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721772764.8U CN207558439U (en) | 2017-12-19 | 2017-12-19 | A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207558439U true CN207558439U (en) | 2018-06-29 |
Family
ID=62663798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721772764.8U Expired - Fee Related CN207558439U (en) | 2017-12-19 | 2017-12-19 | A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207558439U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935370A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit |
-
2017
- 2017-12-19 CN CN201721772764.8U patent/CN207558439U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935370A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of spacer grid of fuel assembly and fuel assembly with plug-in unit |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180629 Termination date: 20211219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |