CN208767029U - A kind of fuel assembly and its bottom nozzle and bottom device - Google Patents
A kind of fuel assembly and its bottom nozzle and bottom device Download PDFInfo
- Publication number
- CN208767029U CN208767029U CN201721772777.5U CN201721772777U CN208767029U CN 208767029 U CN208767029 U CN 208767029U CN 201721772777 U CN201721772777 U CN 201721772777U CN 208767029 U CN208767029 U CN 208767029U
- Authority
- CN
- China
- Prior art keywords
- foreign matter
- hole
- bottom nozzle
- fuel
- guide pipe
- 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.)
- Active
Links
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
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model belongs to reactor engineering technical field, and in particular to a kind of fuel assembly and its bottom nozzle and bottom device.Include: bottom nozzle framework, the supporting leg of bottom nozzle framework lower part is set and several cross parallels in length and breadth are arranged in the isometrical through-hole of bottom nozzle framework upper surface, neutron flux pipe lower end consent and guide pipe lower end consent；The isometrical through-hole is circle.A kind of bottom device, comprising: bottom nozzle and anti-foreign matter component connected to it, the bottom nozzle are bottom nozzle as described above.A kind of fuel assembly, comprising: upper tube socket, fuel rod, grid spacer, guide pipe, gauge pipe and bottom device；Fuel rod, guide pipe and gauge pipe are inserted in grid spacer；Grid spacer shares multiple, sets gradually along axial direction；The upper end of guide pipe and gauge pipe is fixedly connected with upper tube socket, and lower end is fixedly connected with bottom device；Bottom device further include: bottom nozzle and anti-foreign matter component；Bottom nozzle is described in any item bottom nozzles as above.
Description
Technical field
The utility model belongs to reactor engineering technical field, and in particular to a kind of fuel assembly and its bottom nozzle and bottom
Device.
Background technique
Usual nuclear fuel is designed as solid cylindrical, is made of upper and lower end plug, pellet, holddown spring and involucrum, cold
But agent is flowed through outside involucrum, is cooled down to fuel rod.For annular fuel by inside and outside two layers of involucrum, coolant can be simultaneously from inside and outside two
Take away the heat of fuel sending in side.
Fuel assembly bottom device is located at fuel assembly bottom, including bottom nozzle and anti-foreign matter component, is arranged on bottom nozzle
Have coolant flow water hole, for cooling water circulation and play the role of assignment of traffic to coolant, anti-foreign matter component can intercept
The foreign matter that may contain in coolant prevents from causing to damage to fuel rod, and the recirculation hole of the bottom nozzle in existing fuel assembly is set
Pressure drop cannot be effectively reduced if for annular fuel component in meter.
In addition, existing PWR fuel assembly design in, fuel rod generally using grid spacer clamp it is hanging by the way of.
Bottom nozzle supports entire fuel assembly by guide pipe, and general anti-foreign matter component is in bottom nozzle upper surface.In reactor operation
In the end of term in longevity, since the chucking power of the spring of the effect clamping fuel rod of irradiation can strongly reduce, fuel rod can generally fall in down tube
On seat, under the mobilization of coolant, fuel rod may upper and lower play, this will lead to the risk of fuel rod breakage.
Consider that problem above, design consider for fuel rod to be fixed on inside bottom nozzle, grid spacer is not providing fuel rod
The chucking power of support only provides located lateral.If annular fuel rod is fixed on inside bottom nozzle, according to existing anti-foreign matter
Component design, only there is the function of anti-foreign matter to the outer flow passage of fuel rod, and device of the fuel rod inner flow passage without anti-foreign matter, so
Anti- foreign matter device need to be redesigned.
Related document, which discloses reactor fuel assemblies bottom nozzle and is all based on fuel rod, in currently available technology vacantly exists
The fuel assembly on upper tube socket top designs, and anti-foreign matter component is not suitable for the design of annular fuel component yet.Therefore research and development one
Kind novel bottom device and bottom nozzle.
Utility model content
It is existing for solving the purpose of this utility model is to provide a kind of fuel assembly and its bottom nozzle and bottom device
The fault of construction on bottom nozzle top is vacantly arranged in fuel assembly in technology, and improves cooling water flow in fuel assembly outer flow passage
Uneven technical problem is distributed, cooling water flow between stick is increased, enhances heat transfer intensity between stick.
The technical solution of the utility model is:
A kind of bottom nozzle, comprising: bottom nozzle framework, the supporting leg that bottom nozzle framework lower part is arranged in and several intersections in length and breadth are flat
Row is arranged in the isometrical through-hole, neutron flux pipe lower end consent and guide pipe lower end consent of the framework upper surface；It is described isometrical
Through-hole is circle.
Isometrical through-hole as described above includes through-hole and mainstream water hole A, the mainstream water hole A be uniformly arranged on every four it is adjacent
The rectangular centre position that through-hole surrounds, the mainstream water hole aperture A are less than through-hole aperture.
Rectangular configuration through-hole is provided between adjacent through-holes as described above.
Rectangular configuration through-hole as described above includes: mainstream water hole B, mainstream water hole C and mainstream water hole D, the mainstream water hole B
It is uniformly arranged between the adjacent through-holes in addition to the through-hole that outermost one is enclosed.
Mainstream water hole C as described above is arranged in outermost one and encloses between adjacent through-hole；
The surrounding of guide pipe lower end as described above consent is provided with mainstream water hole D, and mainstream water hole D is rectangular configuration.
The control of the ratio between circulation area of maximum rectangle discharge orifice and minimum discharge orifice is 1.3~1.7 as described above, maximum square
The control of the area ratio of shape discharge orifice and round discharge orifice is 1~1.4, the area ratio of minimum rectangle discharge orifice and round discharge orifice
Control is 0.7~0.9.
Through-hole as described above is for installing fuel rod or/and circulation cooling water.
The fuel rod installed as described above is annular fuel rod.
The bore size of through-hole and guide pipe lower end consent as described above and arrangement and fuel rod and guiding in fuel assembly
Pipe matches, and the multiple for four can be set as needed in the setting of guide pipe quantity, and on through-hole and guide pipe lower end consent inner wall
End is provided with chamfering structure.
Chamfer angle α range as described above is 10 °~30 °.
A kind of bottom device, comprising: bottom nozzle and anti-foreign matter component connected to it, the bottom nozzle are any one of as above
The bottom nozzle.
The anti-foreign matter component includes: anti-foreign matter screen frame body and the anti-foreign matter net that connect with anti-foreign matter screen frame body, described anti-
Foreign matter offers multiple filter elements on the net；The structure it is characterized in that, the anti-foreign matter framework is integrally square, the anti-foreign matter
Four angles setting of framework is fluted.
The anti-foreign matter component is arranged inside the bottom nozzle, and the anti-foreign matter component is at a distance from fuel assembly lower end
For 15-40mm；90 ° are rolled over upwards in four side of edge part of the anti-foreign matter screen frame body.
The anti-foreign matter net is jointly mounted to anti-foreign matter screen frame body lower surface, the edge part surrounding of the anti-foreign matter net and anti-
The fitting of foreign matter screen frame body edge part.
Four angles of the anti-foreign matter net are also equipped with groove and match with the groove size in anti-foreign matter framework.
The filter hole cell orifice is rectangular, round or regular hexagon structure.
A kind of fuel assembly, comprising: upper tube socket, fuel rod, grid spacer, guide pipe, gauge pipe and bottom device；Fuel
Stick, guide pipe and gauge pipe are inserted in grid spacer；Grid spacer shares multiple, sets gradually along axial direction；Guide pipe and instrument
The upper end of table pipe is fixedly connected with upper tube socket, and lower end is fixedly connected with bottom device；The bottom device further include: bottom nozzle and
Anti- foreign matter component；The bottom nozzle is described in any item bottom nozzles as above.
The bottom device is described in any item bottom devices as above.
The fuel assembly further includes the more two-sided cooling annular fuel rods for having wrapping wire, these are two-sided with wrapping wire
Cooling annular fuel rod is placed in coaming plate or fuel cassette.
The beneficial effects of the utility model are:
The utility model proposes a kind of fuel assembly and its bottom nozzles and bottom device, can be fixedly inserted in fuel rod
In bottom nozzle, and the chamfering structure by being arranged in the aperture of bottom nozzle guide pipe stablizes fixed fuel stick；Meeting above functions
While, the interface of fuel assembly and core structure is unaffected.
Furthermore the bottom nozzle of the utility model design improves cooling water flow distribution unevenness in fuel assembly outer flow passage
Technical problem increases cooling water flow between consecutive fuel stick, enhances heat transfer intensity between fuel stick, and manufacture difficulty
Small, manufacturing process is simple, and structural strength is big.
The utility model provides that a kind of circulation area is big, and manufacture difficulty is small, the big combustion of manufacturing process simple structure intensity
Expect the bottom device structure of component, the bottom nozzle of the bottom nozzle circulation area foreign matter net more anti-than existing band of the utility model design
Circulation area it is big by 0.6%, effectively reduce the pressure drop of the utility model bottom device.Rectangle and round stream in the utility model
Close to 1, outer tunnel cooling water flow distributes more evenly the area ratio in water hole, and this open-cellular form can be very good to guarantee bottom nozzle
Intensity, and muscle will not generate stress concentration point.
Two-sided cooling annular fuel rod described in the utility model with wrapping wire, be wound on outside annular fuel rod around
Silk has the function of obviously increasing coolant lateral flow, enhances fuel rod to coolant heat-transfer effect, pass through coolant flow-disturbing
More passage of heat heats are taken away, fuel rod temperature is reduced, improve DNBR, enhance fuel rod safety.
Two-sided cooling annular fuel rod described in the utility model with wrapping wire, can two-sided cooling, i.e., it is inside and outside can be with
There is coolant circulation, fuel rod is cooled down.Compared with existing PWR Fuel stick structure, fuel heat transfer area increases
50%, fuel pellet maximum temperature reduces 1000 DEG C, and linear power density increases 20%~50%, and flow resistance reduces 20%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the fuel assembly in some embodiments of the utility model；
Fig. 2 is bottom nozzle top view described in the utility model；
Fig. 3 is bottom device structural schematic diagram described in the utility model；
Fig. 4 is the through-hole partial enlarged view of bottom nozzle described in the utility model；
Fig. 5 is the fuel assembly schematic diagram described in the utility model with wrapping wire.
Wherein: 1- bottom device, 2- fuel rod, 3- grid spacer, the upper tube socket of 4-, 5- wrapping wire, 11- bottom nozzle framework, 12-
Supporting leg, the anti-foreign matter screen frame body of 13-, the anti-foreign matter net of 14-, 15- through-hole, 16- neutron flux pipe lower end consent；17- guide pipe lower end
Consent, 151- mainstream water hole A, 152- mainstream water hole B, 153- mainstream water hole C, 154- mainstream water hole D.
Specific embodiment
The utility model technology is further described in conjunction with specific embodiments below:
As shown in Fig. 1 to 5, a kind of bottom nozzle, comprising: bottom nozzle framework 11, the branch that 11 lower part of bottom nozzle framework is set
Leg 12 and several cross parallels in length and breadth are arranged in the isometrical through-hole of the framework upper surface, neutron flux pipe lower end consent 16 and lead
To pipe lower end consent 17；The isometrical through-hole is circle.
The isometrical through-hole includes through-hole 15 and mainstream water hole A151, and the mainstream water hole A151 is uniformly arranged on every four
The rectangular centre position that adjacent through-holes 15 surround, the mainstream water hole aperture A151 are less than 15 aperture of through-hole.
Rectangular configuration through-hole is provided between the adjacent through-holes 15.
The rectangular configuration through-hole includes: mainstream water hole B152, mainstream water hole C153 and mainstream water hole D154, the mainstream
Water hole B152 is uniformly arranged between the adjacent through-holes 15 in addition to the through-hole 15 that outermost one is enclosed.
The mainstream water hole C153 is arranged in outermost one and encloses between adjacent through-hole 15；
The surrounding of guide pipe lower end consent 17 is provided with mainstream water hole D154, and mainstream water hole D154 is rectangular configuration.
The control of the ratio between the circulation area of the maximum rectangle discharge orifice and minimum discharge orifice is 1.3~1.7, maximum rectangular flow
1~1.4, minimum rectangle discharge orifice and the area ratio of round discharge orifice are controlled for the area ratio control of water hole and round discharge orifice
0.7~0.9.
The through-hole 15 is for installing fuel rod or/and circulation cooling water.
The fuel rod of the installation is annular fuel rod.
The bore size and arrangement of the through-hole 15 and guide pipe lower end consent 17 and fuel rod and guiding in fuel assembly
Pipe matches, and the multiple for four can be set as needed in the setting of guide pipe quantity, and in through-hole 15 and guide pipe lower end consent 17
Wall upper end is provided with chamfering structure.
The chamfer angle α range is 10 °~30 °.
A kind of bottom device, comprising: bottom nozzle and anti-foreign matter component 2 connected to it, the bottom nozzle are as above any
Bottom nozzle described in.
The anti-foreign matter component includes: anti-foreign matter screen frame body 13 and the anti-foreign matter net 14 that connect with anti-foreign matter screen frame body 13,
The anti-foreign matter offers multiple filter elements on the net；It is characterized in that, the whole structure that is square of the anti-foreign matter framework 13, institute
The four angles setting for stating anti-foreign matter framework 13 is fluted.
The anti-foreign matter component is arranged inside the bottom nozzle, and the anti-foreign matter component is at a distance from fuel assembly lower end
For 15-40mm；90 ° are rolled over upwards in four side of edge part of the anti-foreign matter screen frame body 13.
The anti-foreign matter net 14 is jointly mounted to anti-13 lower surface of foreign matter screen frame body, the edge part four of the anti-foreign matter net 14
The fitting of 13 edge part of Zhou Yufang foreign matter screen frame body.
Four angles of the anti-foreign matter net 14 are also equipped with groove and match with the groove size in anti-foreign matter framework 13.
The filter hole cell orifice is rectangular, round or regular hexagon structure.
A kind of fuel assembly, comprising: upper tube socket 4, fuel rod 2, grid spacer 3, guide pipe, gauge pipe and bottom device 1；
Fuel rod 2, guide pipe and gauge pipe are inserted in grid spacer 3；Grid spacer 3 shares multiple, sets gradually along axial direction；Guiding
The upper end of pipe and gauge pipe is fixedly connected with upper tube socket 4, and lower end is fixedly connected with bottom device 1；The bottom device 1 also wraps
It includes: bottom nozzle and anti-foreign matter component；The bottom nozzle is described in any item bottom nozzles as above.
The bottom device 1 is described in any item bottom devices as above.
The fuel assembly further includes the more two-sided cooling annular fuel rods for having wrapping wire 5, these are double with wrapping wire 5
The cooling annular fuel rod in face is placed in coaming plate or fuel cassette.
In some embodiments, fuel assembly is arranged by 3 located lateral of grid spacer, and 2 lower part of fuel rod is fixed
It is fastened in bottom nozzle, therefore grid spacer 3 is not required to provide chucking power, simplifies the structure of grid spacer 3, reduces positioning lattice
The design and manufacture difficulty of frame 3.
The generally square arrangement of fuel rod 2 described in some embodiments, which includes eight guide pipes and an instrument
Pipe；The fuel rod 2 is two layers of containment structure inside and outside annular hollow；The fuel assembly uses fuel rod for inside and outside two-sided cooling
Annular fuel rod, it is inside and outside to have coolant circulation, fuel rod 2 is cooled down.
It is provided with discharge orifice on upper tube socket 4 in some embodiments, coolant can be made to circulate；Upper tube socket 4 is hung for fuel assembly
Dress in container inner support when transport, and is connected with skeleton screw and guiding pipe connected pipe, and holddown spring is arranged at upper tube socket top,
Cooperate the compression for realizing fuel assembly in heap with reactor core top grating, and fuel assembly can be prevented in heap in-core play.
Skeleton screw described in some embodiments and guiding pipe connected pipe are used to connect tube socket and guiding tube assembly, and
Skeleton screw, which has structure that can cooperate with upper tube socket, makes it prevent from loosening.Guiding tube assembly is used to support the entire component of connection, upper end
It is connect by skeleton screw and guiding pipe connected pipe with upper tube socket line, centre is directly connected with grid spacer 3, and lower part passes through bone
It is connected under frame shaft shoulder screw and bottom nozzle.The skeleton shaft shoulder screw has structure for connecting bottom nozzle and guiding tube assembly
Make it that can prevent from loosening with bottom nozzle cooperation.
Grid spacer 3 described in some embodiments makes annular fuel rod in annular fuel group for clamping annular fuel rod
It is positioned in part, and can prevent annular fuel rod from axially and radially moving, grid spacer 3 is connected directly with guiding tube assembly.
Supporting leg 12 described in some embodiments is four, is located at the quadrangle of 11 lower end of bottom nozzle framework, wherein
One group of diagonal 12 lower end of supporting leg is provided with positioning slightly hole, and the bayonet fittings in positioning slightly hole and reactor core lower grid plate are used to support fixation
Fuel assembly realizes positioning of the fuel assembly in heap, reduces 2 Flow vibration of fuel rod, reduces the abrasion of fuel rod 2, into
And the damaged risk of fuel rod 2 is reduced, and 2 lower end of fuel rod is fixed in bottom nozzle, and the previous fuel assembly longevity will not occur
The phenomenon that end of term fuel rod falls, increases the safety of fuel assembly.
The surrounding side of bottom nozzle is provided with side plate in some embodiments, and location hole, the anti-foreign matter are provided on side plate
Component is fixed at bottom nozzle lower part by location hole, is conducive to the distribution of outer flow passage flow in balance fuel stick 2, meanwhile,
Anti- foreign matter component is placed on bottom nozzle lower part, and there are certain distances with 2 lower end of fuel rod, there is coolant flowing, foreign matter in this space
It will not accumulate in discharge orifice, can prevent discharge orifice from blocking.
Anti- foreign matter component is square structure in some embodiments, comprising: anti-foreign matter net 14 and anti-foreign matter screen frame body 13, it is described
The structure of anti-foreign matter screen frame body 13 may be designed to various shapes, such as: it is trapezoidal, and there is sufficiently large intensity, cooling can be born
Agent shock loading.
Anti- foreign matter screen frame body 13 is formed by slab overall processing in some embodiments, thickness 2mm~8mm.The anti-foreign matter
The anti-foreign matter screen frame body muscle that several parallel intervals are arranged in framework is provided on screen frame body 13, anti-foreign matter screen frame body muscle is provided with
Threaded hole.Anti- foreign matter net 14 is formed by thin plate overall processing, thickness 0.8mm~3mm, the filter hole cell configuration of anti-foreign matter net 14
It may be configured as rectangular, round and regular hexagon etc., the side length of filter hole unit may be configured as 0.15~0.35mm.
The utility model is explained in detail above in conjunction with embodiment, but the utility model is not limited to above-mentioned implementation
Example, within the knowledge of a person skilled in the art, can also be in the premise for not departing from the utility model aims
It is lower that various changes can be made.
Claims (20)
1. a kind of bottom nozzle, comprising: bottom nozzle framework (11), setting are in the supporting leg (12) of bottom nozzle framework (11) lower part and several
Cross parallel is arranged in the isometrical through-hole of the framework upper surface, neutron flux pipe lower end consent (16) and guide pipe lower end in length and breadth
Consent (17)；It is characterized in that, the isometrical through-hole is circle.
2. a kind of bottom nozzle according to claim 1, it is characterised in that: the isometrical through-hole includes through-hole (15) and mainstream
Water hole A (151), the mainstream water hole A (151) are uniformly arranged on the rectangular centre position that every four adjacent through-holes (15) surround,
(151) aperture mainstream water hole A is less than through-hole (15) aperture.
3. a kind of bottom nozzle according to claim 2, it is characterised in that: be provided with rectangle between the adjacent through-holes (15)
Structure through-hole.
4. a kind of bottom nozzle according to claim 3, it is characterised in that: the rectangular configuration through-hole includes: mainstream water hole B
(152), mainstream water hole C (153) and mainstream water hole D (154), the mainstream water hole B (152) are uniformly arranged on except outermost one is enclosed
Through-hole (15) other than adjacent through-holes (15) between.
5. a kind of bottom nozzle according to claim 4, it is characterised in that: the mainstream water hole C (153) is arranged in outermost
Between the adjacent through-hole (15) of one circle.
6. a kind of bottom nozzle according to claim 4, it is characterised in that: the surrounding of guide pipe lower end consent (17) is set
It is equipped with mainstream water hole D (154), mainstream water hole D (154) is rectangular configuration.
7. a kind of bottom nozzle according to claim 1, it is characterised in that: the maximum rectangle discharge orifice and minimum discharge orifice
The control of the ratio between circulation area 1.3~1.7, the area ratio control of maximum rectangle discharge orifice and round discharge orifice 1~1.4,
The area ratio of minimum rectangle discharge orifice and round discharge orifice is controlled 0.7~0.9.
8. a kind of bottom nozzle according to claim 1, it is characterised in that: the through-hole (15) for install fuel rod or/
With circulation cooling water.
9. a kind of bottom nozzle according to claim 8, it is characterised in that: the fuel rod of the installation is annular fuel rod.
10. a kind of bottom nozzle according to claim 8, it is characterised in that: the through-hole (15) and guide pipe lower end consent
(17) bore size and arrangement matches with fuel rod in fuel assembly and guide pipe, and the setting of guide pipe quantity can be as needed
It is set as four multiple, and through-hole (15) and guide pipe lower end consent (17) inner wall upper end are provided with chamfering structure.
11. a kind of bottom nozzle according to claim 10, it is characterised in that: the chamfer angle α range is 10 °~30 °.
12. a kind of bottom device, comprising: bottom nozzle and anti-foreign matter component connected to it, it is characterised in that: the bottom nozzle is
The described in any item bottom nozzles of claim 1-11.
13. a kind of bottom device according to claim 12, it is characterised in that: the anti-foreign matter component includes: anti-foreign matter
The anti-foreign matter net (14) of screen frame body (13) Ji Yufang foreign matter screen frame body (13) connection, the anti-foreign matter offer multiple filterings on the net
Unit；The whole structure that is square of anti-foreign matter screen frame body (13), four angles of the anti-foreign matter screen frame body (13) are provided with recessed
Slot.
14. a kind of bottom device according to claim 12, it is characterised in that: the anti-foreign matter component is arranged under described
Inside tube socket, the anti-foreign matter component is 15-40mm at a distance from fuel assembly lower end；The side of the anti-foreign matter screen frame body (13)
90 ° are rolled over upwards in four side of edge.
15. a kind of bottom device according to claim 12, it is characterised in that: the anti-foreign matter net (14) is jointly mounted to
Anti- foreign matter screen frame body (13) lower surface, the edge part surrounding of the anti-foreign matter net (14) and anti-foreign matter screen frame body (13) edge part are pasted
It closes.
16. a kind of bottom device according to claim 12, it is characterised in that: four angles of the anti-foreign matter net (14)
The fluted groove size on anti-foreign matter screen frame body (13) is arranged to match.
17. a kind of bottom device according to claim 12, it is characterised in that: the filter hole cell orifice is rectangular, circle
Shape or regular hexagon structure.
18. a kind of fuel assembly, comprising: upper tube socket (4), fuel rod (2), grid spacer (3), guide pipe, gauge pipe and bottom
Device (1)；Fuel rod (2), guide pipe and gauge pipe are inserted in grid spacer (3)；Grid spacer (3) share it is multiple, along axis
To setting gradually；The upper end of guide pipe and gauge pipe is fixedly connected with upper tube socket (4), and lower end is fixedly connected with bottom device (1)；
The bottom device (1) further include: bottom nozzle and anti-foreign matter component；It is characterized by: the bottom nozzle is claim 1-11
Described in any item bottom nozzles.
19. a kind of fuel assembly according to claim 18, it is characterised in that: the bottom device (1) is claim
The described in any item bottom devices of 12-16.
20. 8 or 19 described in any item fuel assemblies according to claim 1, it is characterised in that: the fuel assembly further includes more
Root has the two-sided cooling annular fuel rod of wrapping wire (5), these two-sided cooling annular fuel rods with wrapping wire (5), which are placed in, to be enclosed
In plate or fuel cassette.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721772777.5U CN208767029U (en) | 2017-12-19 | 2017-12-19 | A kind of fuel assembly and its bottom nozzle and bottom device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721772777.5U CN208767029U (en) | 2017-12-19 | 2017-12-19 | A kind of fuel assembly and its bottom nozzle and bottom device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208767029U true CN208767029U (en) | 2019-04-19 |
Family
ID=66124294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721772777.5U Active CN208767029U (en) | 2017-12-19 | 2017-12-19 | A kind of fuel assembly and its bottom nozzle and bottom device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208767029U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935351A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of fuel assembly and its bottom nozzle and bottom device |
| CN109935362A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of bottom device of fuel assembly and its bottom nozzle and fuel assembly |
| CN109935363A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | Fuel assembly and its bottom device and bottom nozzle applied to bottom device |
-
2017
- 2017-12-19 CN CN201721772777.5U patent/CN208767029U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935351A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of fuel assembly and its bottom nozzle and bottom device |
| CN109935362A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of bottom device of fuel assembly and its bottom nozzle and fuel assembly |
| CN109935363A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | Fuel assembly and its bottom device and bottom nozzle applied to bottom device |
| CN109935363B (en) * | 2017-12-19 | 2024-05-10 | 中国原子能科学研究院 | Fuel assembly and bottom device thereof and bottom tube seat applied to bottom device |
| CN109935362B (en) * | 2017-12-19 | 2024-05-14 | 中国原子能科学研究院 | Fuel assembly, lower tube seat thereof and bottom device of fuel assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208767029U (en) | A kind of fuel assembly and its bottom nozzle and bottom device | |
| US20070206717A1 (en) | Multiple and variably-spaced intermediate flow mixing vane grids for fuel assembly | |
| RU2407078C2 (en) | Improved control assembly of gray rods | |
| CN109935363A (en) | Fuel assembly and its bottom device and bottom nozzle applied to bottom device | |
| CN208580588U (en) | A kind of bottom device of fuel assembly and its bottom nozzle and fuel assembly | |
| CN208767031U (en) | Fuel assembly and its bottom device and bottom nozzle applied to bottom device | |
| CN103474099B (en) | high thermal neutron fluence rate reactor core | |
| WO2016119292A1 (en) | Flow distribution device and nuclear reactor assembly with same | |
| JP6541680B2 (en) | Lower fuel assembly lower nozzle with less pressure drop | |
| CN109935362A (en) | A kind of bottom device of fuel assembly and its bottom nozzle and fuel assembly | |
| CN109935351A (en) | A kind of fuel assembly and its bottom nozzle and bottom device | |
| CN208673733U (en) | Fuel assembly and its bottom device and anti-foreign matter component applied to bottom device | |
| CN201927363U (en) | Top tube seat for low pressure drop fuel assembly | |
| CN207947072U (en) | The anti-foreign matter component of fuel assembly and its bottom device and fuel assembly | |
| KR101474548B1 (en) | Nuclear fuel assembly having a protective grid to prevent flow-induced vibration | |
| CN109935348A (en) | A kind of two-sided cooling annular fuel assembly being provided with periphery protection structure | |
| CN109935352A (en) | Fuel assembly and its bottom device and anti-foreign matter component applied to bottom device | |
| CN109935353A (en) | The anti-foreign matter component of fuel assembly and its bottom device and fuel assembly | |
| KR100927133B1 (en) | Spacer Grid with Tubular Dimple for The Debris Filtering | |
| CN207909505U (en) | A kind of two-sided cooling annular fuel assembly being provided with periphery protection structure | |
| WO2023077687A1 (en) | Fuel rod, fuel assembly, and reactor core | |
| CN208400501U (en) | A kind of modular fuel assembly | |
| JPS5857718B2 (en) | composite fuel assembly | |
| JP2003294878A (en) | Fuel assembly | |
| JP2011221016A (en) | Exposure boost zone for boiling water reactor nuclear bundles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |