CN109935363A - Fuel assembly and its bottom device and bottom nozzle applied to bottom device - Google Patents
Fuel assembly and its bottom device and bottom nozzle applied to bottom device Download PDFInfo
- Publication number
- CN109935363A CN109935363A CN201711369549.8A CN201711369549A CN109935363A CN 109935363 A CN109935363 A CN 109935363A CN 201711369549 A CN201711369549 A CN 201711369549A CN 109935363 A CN109935363 A CN 109935363A
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- foreign matter
- bottom nozzle
- fuel assembly
- hole
- fuel
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- 239000000446 fuel Substances 0.000 title claims abstract description 136
- 125000006850 spacer group Chemical group 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000013461 design Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract 1
- 239000000306 component Substances 0.000 description 23
- 239000002826 coolant Substances 0.000 description 13
- 239000011148 porous material Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 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
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention belongs to reactor engineering technical fields, and in particular to a kind of fuel assembly and its bottom device and the bottom nozzle applied to 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；It is characterized in that, the isometrical through-hole is circle.The present invention provides also a kind of bottom device, comprising: bottom nozzle as mentioned and anti-foreign matter component connected to it.The present invention provides 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；The bottom device is bottom device as described above.
Description
Technical field
The invention belongs to reactor engineering technical fields, and in particular to a kind of fuel assembly and its bottom device and be applied to
The bottom nozzle of 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.
Summary of the invention
The purpose of the present invention is to provide a kind of fuel assembly and its bottom device and applied to the bottom nozzle of bottom device,
Solve the technical problem that fuel assembly bottom nozzle is insufficient in fuel assembly application in the prior art.
The technical scheme is that
A kind of bottom nozzle of fuel assembly, comprising: the supporting leg of bottom nozzle framework lower part and several is arranged in bottom nozzle framework
Cross parallel is arranged in end plug under the isometrical through-hole, neutron measurement pore and guide pipe of bottom nozzle framework upper surface in length and breadth
Hole；It is characterized in that, the isometrical through-hole is circle.
Difference range is 0.05~0.4mm at the internal diameter and largest outside diameter of isometrical through-hole as described above.
The rectangular centre position that adjacent four isometrical through-holes as described above surround is provided with rectangle mainstream water hole A；Each lead
The surrounding of pipe lower end consent and neutron measurement pore is provided with several mainstream water hole B.
Mainstream water hole B as described above is rectangular configuration.
The circulation area of mainstream water hole B as described above is less than the circulation area of mainstream water hole A.
The upper surface of isometrical through-hole as described above is inverted round table shape, forms chamfering structure design.
Chamfer angle α range as described above is 10 °~30 °.
The lower end surface of isometrical through-hole as described above, which is positive, sets truncated cone-shaped, forms chamfering structure design.
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.
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.
Anti- foreign matter component as described above includes: anti-foreign matter screen frame body and the anti-foreign matter net that connect with anti-foreign matter screen frame body, institute
It states anti-foreign matter and offers multiple filter elements on the net；The structure it is characterized in that, the anti-foreign matter screen frame body is integrally square, it is described
Four angles setting of anti-foreign matter framework is fluted.
Anti- foreign matter component is arranged inside the bottom nozzle as described above, the anti-foreign matter component and fuel assembly lower end
Distance is 15-40mm；90 ° are rolled over upwards in four side of edge part of the anti-foreign matter screen frame body.
Anti- foreign matter net as described above is jointly mounted to anti-foreign matter screen frame body lower surface, the edge part surrounding of the anti-foreign matter net
It is bonded with anti-foreign matter screen frame body edge part.
Four angles of anti-foreign matter net as described above are also equipped with groove and match with the groove size in anti-foreign matter framework.
Filter hole cell orifice as described above 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 bottom device as described above, and the fuel rod is two-sided cooling annular fuel rod.
Fuel assembly as described above further includes the more two-sided cooling annular fuel rods for having wrapping wire, these have wrapping wire
Two-sided cooling annular fuel rod is placed in coaming plate or fuel cassette.
The beneficial effects of the present invention are:
The invention proposes a kind of fuel assembly and its bottom device and applied to the bottom nozzle of bottom device, existing
Fuel rod insertion is fixed in bottom nozzle in fuel assembly structure design basis, grid spacer no longer provides fuel rod support
Chucking power only provides located lateral function.
The present invention has the function of that flow resistance is low and has relatively strong anti-foreign matter, and is capable of fixing fuel rod, is meeting above functions
While, fuel support assembly function and unaffected with the interface of core structure.
The present invention provides a kind of circulation area is big, manufacture difficulty is small, the big fuel stack of manufacturing process simple structure intensity
The bottom device structure of part, the circulating face of the bottom nozzle of the bottom nozzle circulation area that the present invention designs foreign matter net more anti-than existing band
Product is big by 0.6%, effectively reduces the pressure drop of bottom device of the present invention.
Two-sided cooling annular fuel rod of the present invention with wrapping wire, the wrapping wire being wound on outside annular fuel rod,
Have the function of obviously increasing coolant lateral flow, enhances fuel rod to coolant heat-transfer effect, pass through coolant flow-disturbing band
More passage of heat heats are walked, fuel rod temperature is reduced, improve DNBR, enhance fuel rod safety.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the fuel assembly in some embodiments of the invention；
Fig. 2 is bottom nozzle top view of the present invention；
Fig. 3 is bottom device structural schematic diagram of the present invention；
Fig. 4 is the isometrical through-hole partial enlarged view of bottom nozzle of the present invention；
Fig. 5 is the fuel assembly schematic diagram of the present invention 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-, the isometrical through-hole of 15-；16- neutron measurement pore；End plug under 17- guide pipe
Hole；111- mainstream water hole A, 112- mainstream water hole B
Specific embodiment
The technology of the present invention is described further below:
Specific embodiment:
As shown in Fig. 1 to 5, a kind of bottom nozzle of fuel assembly, comprising: bottom nozzle framework 11 is arranged in bottom nozzle framework
The supporting leg 12 of 11 lower parts and several cross parallels in length and breadth are arranged in isometrical through-hole 15, the neutron of 11 upper surface of bottom nozzle framework
Measure pore 16 and guide pipe lower end consent 17；It is characterized in that, the isometrical through-hole 15 is circle.
Difference range is 0.05~0.4mm at the internal diameter and largest outside diameter of the isometrical through-hole 15.
The rectangular centre position that adjacent four isometrical through-holes 15 surround is provided with rectangle mainstream water hole A111；Each lead
The surrounding of pipe lower end consent 17 and neutron measurement pore 16 is provided with several mainstream water hole B112.
The mainstream water hole B112 is rectangular configuration.
The circulation area of the mainstream water hole B112 is less than the circulation area of mainstream water hole A111.
The upper surface of the isometrical through-hole 15 is inverted round table shape, forms chamfering structure design.
The chamfer angle α range is 10 °~30 °.
The lower end surface of the isometrical through-hole 15, which is positive, sets truncated cone-shaped, forms chamfering structure design.
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.
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 13 and the anti-foreign matter net 14 that connect with anti-foreign matter screen frame body 13,
Multiple filter elements are offered on the anti-foreign matter net 14；Filter hole unit aperture is less than 15 aperture of through-hole.
It is characterized in that, the whole structure that is square of the anti-foreign matter screen frame body 13, four angles of the anti-foreign matter framework 13
It is arranged 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 is jointly mounted to anti-13 lower surface of foreign matter screen frame body, the edge part surrounding of the anti-foreign matter net 14
It is bonded with anti-13 edge part of 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 device is bottom device as described above.
The bottom nozzle is described in any item bottom nozzles as above；The fuel rod 2 is two-sided cooling annular fuel rod.Institute
The two-sided cooling annular fuel rod with wrapping wire stated, the two-sided cooling of energy is that is, inside and outside to have coolant circulation, to fuel rod
It is cooled down.Compared with existing PWR Fuel stick structure, fuel heat transfer area increases 50%, and fuel pellet maximum temperature reduces
1000 DEG C, linear power density increases 20%~50%, and flow resistance reduces 20%.
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, 2 lower part of fuel rod is fixedly inserted in bottom nozzle, therefore grid spacer 3 is not required to provide clamping
Power simplifies the structure of grid spacer 3, reduces the design and manufacture difficulty of grid spacer 3；The fuel rod is generally rectangular
Arrangement, which includes eight guide pipes and a gauge pipe；The fuel rod is two layers of containment structure inside and outside annular hollow；On
Tube socket 4, skeleton screw, guiding tube assembly, skeleton shaft shoulder screw, guiding pipe connected pipe, grid spacer 3, bottom device 1 constitute combustion
Expect component framework, is used to support and fetters fuel rod, so that fuel rod is mounted on the suitable position of reactor core, and hang in transport
Guarantee that fuel rod does not move when dress and normal operation.
It is provided with discharge orifice on the upper tube socket 4, coolant can be made to circulate；Upper tube socket 4 is lifted for fuel assembly, when transport
It is connected in container inner support, and with skeleton screw and guiding pipe connected pipe, holddown spring is arranged at upper 4 top of tube socket, on reactor core
Compression of the fuel assembly in heap is realized in screen cooperation, and fuel assembly can be prevented in heap in-core play, and upper 4 top of tube socket is used fixed
The bayonet fittings of position pin hole and reactor core top grating are fixed, and are realized positioning of the fuel assembly in heap, are provided with flowing water on upper tube socket 4
Hole can make coolant circulate, if the position of aperture can guarantee when annular fuel rod play occurs that fuel rod 2 will not scurry out upper tube
Seat 4.
The skeleton screw and guiding pipe connected pipe are for connecting tube socket and guiding tube assembly, and skeleton screw has knot
Structure can cooperate with upper tube socket makes it prevent from loosening.Guiding tube assembly is used to support the entire component of connection, and upper end passes through skeleton screw
And guiding pipe connected pipe connect with upper tube socket line, centre be directly connected with grid spacer 3, lower part pass through skeleton shaft shoulder screw and
It is connected under bottom nozzle.The skeleton shaft shoulder screw has structure to make itself and bottom nozzle for connecting bottom nozzle and guiding tube assembly
Cooperation can prevent from loosening.
In some embodiments, the bottom nozzle is an integral structure, and the bottom nozzle framework 11 has certain intensity
It can bear the various load given of fuel assembly and core components in operation, the even aperture distribution of the discharge orifice and aperture has
Biggish circulation area, to prevent bottom nozzle from having biggish pressure drop.
The supporting leg 12 is four, the quadrangle of the framework lower end is located at, wherein one group of diagonal 12 lower end of supporting leg is set
It is equipped with positioning slightly hole, the bayonet fittings in positioning slightly hole and reactor core lower grid plate are used to support stationary annular fuel assembly, realize fuel
Positioning of the component in heap, reduces annular fuel rod Flow vibration, reduces the abrasion of annular fuel rod, thereby reduces annular
The risk of fuel rod breakage, and annular fuel rod lower end is fixed in bottom nozzle, and the previous end of term in fuel assembly longevity combustion will not occur
The phenomenon that charge bar falls, increases the safety of fuel assembly.The surrounding side of the bottom nozzle is provided with side plate, sets on side plate
It is equipped with location hole, the anti-foreign matter component is fixed at bottom nozzle lower part by location hole, is conducive to counterbalance annular fuel rod
The distribution of interior outer flow passage flow, meanwhile, anti-foreign matter component is placed on bottom nozzle lower part and annular fuel rod lower end there are certain distance,
There is coolant flowing in this space, foreign matter will not accumulate in recirculation hole, can prevent recirculation hole from blocking.
In some embodiments, the anti-foreign matter component is square structure, comprising: anti-foreign matter net 14 and anti-foreign matter screen frame body
13, the structure of the anti-foreign matter screen frame body 13 may be designed to various shapes, such as: it is trapezoidal, and there is sufficiently large intensity, it can hold
By coolant shock loading.
Four side of edge part of the anti-foreign matter screen frame body 13 is rolled over 90 ° upwards and is threadedly coupled with the side of bottom nozzle, described anti-
Foreign matter screen frame body 13 is formed by slab overall processing, thickness 2mm~8mm.It is provided on the anti-foreign matter screen frame body 13 several flat
Row interval is arranged in the anti-foreign matter screen frame frame muscle in framework, and anti-foreign matter screen frame frame muscle is provided with threaded hole.
The anti-foreign matter net 14 is formed by thin plate overall processing, thickness 0.2mm~3.5mm, the filter hole of anti-foreign matter net 14
Cell configuration may be configured as rectangular, round and regular hexagon etc., and the side length of filter hole unit may be configured as 1.5~4mm.
The present invention is explained in detail above in conjunction with embodiment, but the present invention is not limited to above-described embodiments, at this
Field those of ordinary skill within the scope of knowledge, can also make various changes without departing from the purpose of the present invention
Change.
Claims (20)
1. a kind of bottom nozzle of fuel assembly, comprising: bottom nozzle framework (11), setting bottom nozzle framework (11) lower part supporting leg
(12) and several cross parallels in length and breadth are arranged in isometrical through-hole (15), the neutron moisture buret of bottom nozzle framework (11) upper surface
Hole (16) and guide pipe lower end consent (17)；It is characterized in that, the isometrical through-hole (15) is circle.
2. a kind of bottom nozzle of fuel assembly according to claim 1, it is characterised in that: the isometrical through-hole (15) it is interior
Difference range is 0.05~0.4mm at diameter and largest outside diameter.
3. a kind of bottom nozzle of fuel assembly according to claim 1, it is characterised in that: adjacent four isometrical through-holes
(15) the rectangular centre position surrounded is provided with rectangle mainstream water hole A (111)；Each guide pipe lower end consent (17) and neutron moisture
The surrounding in buret hole (16) is provided with several mainstream water hole B (112).
4. a kind of bottom nozzle of fuel assembly according to claim 3, it is characterised in that: the mainstream water hole B (112) is
Rectangular configuration.
5. a kind of bottom nozzle of fuel assembly according to claim 3, it is characterised in that: the mainstream water hole B (112)
Circulation area is less than the circulation area of mainstream water hole A (111).
6. a kind of fuel assembly bottom device according to claim 1, it is characterised in that: the isometrical through-hole (15) it is upper
End face is inverted round table shape, forms chamfering structure design.
7. a kind of bottom nozzle of fuel assembly according to claim 5, it is characterised in that: the chamfer angle α range is
10 °~30 °.
8. a kind of bottom nozzle of fuel assembly according to claim 1, it is characterised in that: under the isometrical through-hole (15)
End face, which is positive, sets truncated cone-shaped, forms chamfering structure design.
9. a kind of bottom nozzle of fuel assembly according to claim 1, it is characterised in that: the through-hole (15) is for installing
Fuel rod or/and circulation cooling water.
10. a kind of bottom nozzle of fuel assembly according to claim 8, it is characterised in that: the fuel rod of the installation is
Annular fuel rod.
11. a kind of bottom nozzle of fuel assembly according to claim 8, it is characterised in that: the through-hole (15) and guiding
The bore size of pipe lower end consent (17) and arrangement match with fuel rod in fuel assembly and guide pipe, the setting of guide pipe quantity
The multiple for four can be set as needed.
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, offers on the anti-foreign matter net (14) multiple
Filter element；The structure it is characterized in that, the anti-foreign matter screen frame body (13) is integrally square, the four of the anti-foreign matter framework (13)
A angle setting is fluted.
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 is jointly mounted to prevent different
Object screen frame body (13) lower surface, the edge part surrounding of the anti-foreign matter net (14) are bonded with anti-foreign matter screen frame body (13) edge part.
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 framework (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 12-17, the fuel rod (2) are two-sided cooling annular fuel rod.
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 |
|---|---|---|---|
| CN201711369549.8A CN109935363B (en) | 2017-12-19 | 2017-12-19 | Fuel assembly and bottom device thereof and bottom tube seat applied to bottom device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369549.8A CN109935363B (en) | 2017-12-19 | 2017-12-19 | Fuel assembly and bottom device thereof and bottom tube seat applied to bottom device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109935363A true CN109935363A (en) | 2019-06-25 |
| CN109935363B CN109935363B (en) | 2024-05-10 |
Family
ID=66983126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711369549.8A Active CN109935363B (en) | 2017-12-19 | 2017-12-19 | Fuel assembly and bottom device thereof and bottom tube seat applied to bottom device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109935363B (en) |
Cited By (4)
| 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 |
| CN111489840A (en) * | 2020-05-25 | 2020-08-04 | 中国原子能科学研究院 | Detachable annular fuel test assembly |
| WO2024125080A1 (en) * | 2022-12-12 | 2024-06-20 | 中广核研究院有限公司 | Bottom pipe base of nuclear fuel assembly capable of limiting vibration of fuel rods |
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| CN208580588U (en) * | 2017-12-19 | 2019-03-05 | 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 |
| CN208767029U (en) * | 2017-12-19 | 2019-04-19 | 中国原子能科学研究院 | A kind of fuel assembly and its bottom nozzle and bottom device |
| CN208767031U (en) * | 2017-12-19 | 2019-04-19 | 中国原子能科学研究院 | Fuel assembly and its bottom device and bottom nozzle applied to 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 |
| 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 |
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| CN208767031U (en) * | 2017-12-19 | 2019-04-19 | 中国原子能科学研究院 | Fuel assembly and its bottom device and bottom nozzle applied to 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 |
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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 |
| 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 |
| CN111489840A (en) * | 2020-05-25 | 2020-08-04 | 中国原子能科学研究院 | Detachable annular fuel test assembly |
| WO2024125080A1 (en) * | 2022-12-12 | 2024-06-20 | 中广核研究院有限公司 | Bottom pipe base of nuclear fuel assembly capable of limiting vibration of fuel rods |
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