CN109935352A - Fuel assembly and its bottom device and anti-foreign matter component applied to bottom device - Google Patents
Fuel assembly and its bottom device and anti-foreign matter component applied to bottom device Download PDFInfo
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- CN109935352A CN109935352A CN201711369529.0A CN201711369529A CN109935352A CN 109935352 A CN109935352 A CN 109935352A CN 201711369529 A CN201711369529 A CN 201711369529A CN 109935352 A CN109935352 A CN 109935352A
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- Prior art keywords
- foreign matter
- component
- bottom device
- fuel
- net
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- 239000000446 fuel Substances 0.000 title claims abstract description 115
- 125000006850 spacer group Chemical group 0.000 claims abstract description 20
- 210000003205 muscle Anatomy 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims 1
- 239000002826 coolant Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 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
- 238000005192 partition Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention belongs to reactor engineering technical fields, and in particular to a kind of fuel assembly and its bottom device and the anti-foreign matter component applied to bottom device.The anti-foreign matter net for including: anti-foreign matter screen frame body and connecting with anti-foreign matter screen frame body, anti-foreign matter offer multiple filter elements on the net；Anti- foreign matter framework is integrally square structure, and four angles setting of anti-foreign matter framework is fluted.A kind of bottom device, comprising: bottom nozzle and anti-foreign matter component connected to it, anti-foreign matter component are described in any item anti-foreign matter components as 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；Anti- foreign matter component is the anti-foreign matter component as described in the next item up.
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 anti-foreign matter component 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 hand end of term, 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, in addition in the design of anti-foreign matter device, original design one
As be divided into two kinds: one is the structures that anti-foreign matter net is arranged, and anti-foreign matter net is located to the upper end of bottom nozzle upper plate.One is utilizations
The vertically and horizontally arranged function to reach anti-foreign matter of partition.If annular fuel rod is fixed on inside bottom nozzle, still using existing anti-
The design of foreign matter component, then anti-foreign matter component can only have a function of anti-foreign matter to the outer flow passage of fuel rod, and fuel rod inner flow passage without
The device of anti-foreign matter, so need to be redesigned to anti-foreign matter component.
Related document discloses the anti-foreign matter component of reactor fuel assemblies and is each provided at bottom nozzle upper plate in currently available technology
Upper end, and anti-foreign matter component is not suitable for the design of annular fuel component yet.Therefore it need to research and develop a kind of suitable for present invention combustion
Expect the novel bottom device and anti-foreign matter component of component.
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 anti-foreign matter of bottom device
Component solves bottom device and anti-foreign matter the component not sufficiently effective technical problem of anti-foreign matter in fuel assembly application.
The technical scheme is that
A kind of anti-foreign matter component of fuel assembly, comprising: anti-foreign matter screen frame body and preventing of connecting with anti-foreign matter screen frame body are different
Object net, the anti-foreign matter offer multiple filter elements on the net；The anti-foreign matter framework is integrally square structure, the anti-foreign matter
Four angles setting of framework is fluted.
90 ° are rolled over upwards in four side of edge part of anti-foreign matter screen frame body as described above and anti-foreign matter net.
The edge part of anti-foreign matter net as described above is bonded fixation with four sides of the edge part of anti-foreign matter screen frame body, and formation is prevented different
Object net and anti-foreign matter screen frame body edge part flexure plane.
Anti- foreign matter screen frame body upper surface as described above is provided with the anti-foreign matter screen frame body muscle of level crossing arrangement, anti-foreign matter net
On be provided with level crossing arrangement anti-foreign matter net muscle.
Threaded hole is evenly arranged on anti-foreign matter screen frame body muscle as described above.
Anti- foreign matter as described above is evenly equipped with the aperture closed with corresponding threaded holes, anti-foreign matter net and anti-foreign matter screen frame body muscle on the net
It is spirally connected.
Filter hole cell orifice as described above is rectangular, round or regular hexagon structure.
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.
A kind of bottom device, comprising: bottom nozzle and anti-foreign matter component connected to it, the anti-foreign matter component are such as to take up an official post
Anti- foreign matter component described in one.
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；The anti-foreign matter selvage edge is threadedly coupled with the side of bottom nozzle.
Bottom nozzle as described above includes: bottom nozzle framework, the supporting leg that bottom nozzle framework lower part is arranged in and several hands in length and breadth
Fork is arranged in parallel within the isometrical through-hole, neutron measurement pore and guide pipe lower end consent of the framework upper surface；It is described isometrical logical
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 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 °.
For through-hole as described above for installing fuel rod or/and circulation cooling water, the fuel rod of the installation is annular fuel
Stick.
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 anti-foreign matter component is the anti-foreign matter component as described in the next item up.
Bottom device as described above is described in any item bottom devices as above.
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 anti-foreign matter component of bottom device, existing
Fuel rod insertion is fixed in bottom nozzle in some fuel assembly structure design basis, grid spacer no longer provides fuel rod branch
The chucking power of support only provides located lateral function；The anti-foreign matter net of anti-foreign matter screen component is curved surface, and the anti-foreign matter net of curved surface is placed on
Bottom nozzle lower end can prevent foreign matter from entering in bottom nozzle, and a earth is formed between anti-foreign matter screen component and fuel rod lower end
Cavity facilitates inside and outside cooling duct assignment of traffic more evenly, plays the role of flow distribution baffle.Meeting the same of above functions
When, 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 circulation area of the anti-foreign matter modular construction of part bottom device, the bottom nozzle of circulation area foreign matter net more anti-than existing band is big
0.6%, effectively reduce the pressure drop of bottom nozzle 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 device structural schematic diagram of the present invention；
Fig. 3 is anti-foreign matter component structure diagram of the present invention；
Fig. 4 is down tube block hole partial enlarged view of the present invention；
Fig. 5 is the fuel assembly schematic diagram of the present invention with wrapping wire.
Wherein: 1- bottom device, 2- annular fuel rod, 3- grid spacer, the upper tube socket of 4-, 11- bottom nozzle framework, 12- branch
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；17- guide pipe lower end consent；
18- threaded hole, the anti-foreign matter screen frame body muscle of 131-, the anti-foreign matter net muscle of 141-.
Specific embodiment
It is further described to the technology of the present invention and in conjunction with specific embodiments below:
As shown in Fig. 1 to 5, a kind of anti-foreign matter component of fuel assembly, comprising: anti-foreign matter screen frame body 13 and with anti-foreign matter net
The anti-foreign matter net 14 that framework 13 connects offers multiple filter elements on the anti-foreign matter net 14；The anti-foreign matter framework 13 is whole
Body is square structure, and four angles setting of the anti-foreign matter framework 13 is fluted.
90 ° are rolled over upwards in four side of edge part of the anti-foreign matter screen frame body 13 and anti-foreign matter net 14.
The edge part of the anti-foreign matter net 14 is bonded fixation with four sides of the edge part of anti-foreign matter screen frame body 13, and formation is prevented different
Object net 14 and anti-13 edge part flexure plane of foreign matter screen frame body.
Anti- 13 upper surface of foreign matter screen frame body is provided with the anti-foreign matter screen frame body muscle 131 of level crossing arrangement, anti-foreign matter
The anti-foreign matter net muscle 141 of level crossing arrangement is provided on net 14.
Threaded hole 18 is evenly arranged on the anti-foreign matter screen frame body muscle 131.
The aperture matched with threaded hole 18, anti-foreign matter net 14 and anti-foreign matter screen frame body are evenly equipped on the anti-foreign matter net 14
Muscle 131 is spirally connected.
The filter hole cell orifice is rectangular, round or regular hexagon structure.
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.
A kind of bottom device, bottom nozzle and anti-foreign matter component connected to it, the anti-foreign matter component are any one of as above
The anti-foreign matter component.
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；Anti- 14 edge part of foreign matter net is threadedly coupled with the side of bottom nozzle.
The bottom nozzle include: bottom nozzle framework 11, the supporting leg 12 that 11 lower part of bottom nozzle framework is set and it is several in length and breadth
Cross parallel is arranged in the isometrical through-hole 15, neutron measurement pore 16 and guide pipe lower end consent 17 of the framework upper surface；Institute
Isometrical through-hole 15 is stated as circle.
Difference range is 0.05~0.4mm at the internal diameter and largest outside diameter of the isometrical through-hole 15.
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 °.
For the through-hole 15 for installing fuel rod or/and circulation cooling water, the fuel rod of the installation is annular fuel rod.
A kind of fuel assembly, comprising: upper tube socket 4, grid spacer 3, guide pipe, gauge pipe skeleton screw, is led at fuel rod 2
To pipe connected pipe, skeleton shaft shoulder screw and bottom device 1；Fuel rod 2, guide pipe and gauge pipe are inserted in grid spacer 3, this
Connection type constitutes fuel assembly frame structure, is used to support and fetters annular fuel rod 2, fuel rod 2 is enable to be mounted on reactor core
Suitable position, and in transporting and hoisting and normal operation guarantee annular fuel rod 2 do not move.
The grid spacer 3 shares multiple, sets gradually along axial direction；The upper end of guide pipe and gauge pipe and upper tube socket 4 are solid
Fixed connection, lower end are fixedly connected with bottom device 1, therefore grid spacer 3 is not required to provide chucking power, simplifies grid spacer 3
Structure reduces the design and manufacture difficulty of grid spacer 3；The anti-foreign matter component level is fixed at bottom nozzle lower end
Face；The bottom device 1 further include: bottom nozzle and anti-foreign matter component；The anti-foreign matter component be as described in the next item up prevent it is different
Object component.
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.
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 be annular hollow inside and outside two layers of containment structure inside and outside two-sided cooling annular fuel rod, it is inside and outside have it is cold
But agent is circulated, and is cooled down to fuel rod.
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 will not scurry out upper tube
Seat.
The skeleton screw and guiding pipe connected pipe are for connecting tube socket 4 and guide pipe, and skeleton screw has structure
Can cooperate with upper tube socket 4 makes it prevent from loosening.Guide pipe is used to support the entire component of connection, and upper end passes through skeleton screw and guiding
Pipe connected pipe is connect with upper 4 line of tube socket, and centre is directly connected with grid spacer 3, and lower part passes through skeleton shaft shoulder screw and down tube
The lower connection of seat.The skeleton shaft shoulder screw has structure to prevent it can with bottom nozzle cooperation for connecting bottom nozzle and guide pipe
Only loosen.
Bottom nozzle described in some embodiments is an integral structure, and the surrounding side of bottom nozzle is provided with side plate, on side plate
It is provided with location hole, bottom nozzle lower end quadrangle is provided with supporting leg 12.
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.
Four side of edge part of anti-foreign matter screen frame body 13 described in some embodiments rolls over 90 ° upwards, and radius bend 10mm~
40mm is threadedly coupled with the side of bottom nozzle, and the anti-foreign matter screen frame body 13 is formed by slab overall processing, thickness 2mm~8mm.
Anti- foreign matter net 14 is formed by thin plate overall processing in some embodiments, thickness 0.2mm~3.5mm, the filter hole
The side length of unit may be configured as 1.5~4mm.It can also be designed to various shapes for the structure of the anti-foreign matter screen frame body 13, such as: trapezoidal
Deng, and there is sufficiently large intensity, coolant shock loading can be born.
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 (18)
1. a kind of anti-foreign matter component of fuel assembly, comprising: anti-foreign matter screen frame body (13) Ji Yufang foreign matter screen frame body (13) connection
Anti- foreign matter net (14), which is characterized in that offer multiple filter elements on the anti-foreign matter net (14)；The anti-foreign matter framework
(13) four angles setting of the whole structure that is square, the anti-foreign matter framework (13) is fluted.
2. a kind of anti-foreign matter component of fuel assembly according to claim 1, it is characterised in that: the anti-foreign matter screen frame body
(13) and four side of edge part of anti-foreign matter net (14) rolls over 90 ° upwards.
3. a kind of anti-foreign matter component of fuel assembly according to claim 2, it is characterised in that: the anti-foreign matter net (14)
Edge part be bonded fixation with four sides of the edge part of anti-foreign matter screen frame body (13), form anti-foreign matter net (14) and anti-foreign matter screen frame
Body (13) edge part flexure plane.
4. a kind of anti-foreign matter component of fuel assembly according to claim 1, it is characterised in that: the anti-foreign matter screen frame body
(13) upper surface is provided with the anti-foreign matter screen frame body muscle (131) of level crossing arrangement, is provided with parallel friendship on anti-foreign matter net (14)
Pitch the anti-foreign matter net muscle (141) of arrangement.
5. a kind of anti-foreign matter component of fuel assembly according to claim 3, it is characterised in that: the anti-foreign matter screen frame body
Threaded hole (18) are evenly arranged on muscle (131).
6. a kind of anti-foreign matter component of fuel assembly according to claim 1, it is characterised in that: the anti-foreign matter net (14)
On be evenly equipped with the aperture matched with threaded hole (18), anti-foreign matter net (14) is spirally connected with anti-foreign matter screen frame body muscle (131).
7. a kind of anti-foreign matter component of annular fuel component according to claim 1, it is characterised in that: the filter hole list
First hole is rectangular, round or regular hexagon structure.
8. a kind of anti-foreign matter component of annular fuel component according to claim 1, it is characterised in that: the anti-foreign matter net
(14) four angles are also equipped with groove and match with the groove size on anti-foreign matter framework (13).
9. a kind of bottom device, comprising: bottom nozzle and anti-foreign matter component connected to it, it is characterised in that: the anti-foreign matter group
Part is the described in any item anti-foreign matter components of claim 1-8.
10. a kind of bottom device according to claim 9, 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；Anti- foreign matter net (14) edge part with
The side of bottom nozzle is threadedly coupled.
11. a kind of bottom device according to claim 9, it is characterised in that: the bottom nozzle includes: bottom nozzle framework
(11), it is arranged and is arranged in the framework upper surface in the supporting leg (12) of bottom nozzle framework (11) lower part and several cross parallels in length and breadth
Isometrical through-hole (15), neutron flux pipe lower end consent (16) and guide pipe lower end consent (17)；The isometrical through-hole (15) is
It is round.
12. a kind of bottom device according to claim 9, it is characterised in that: the internal diameter of the isometrical through-hole (15) and outer
Diameter maximum difference range is 0.05~0.4mm.
13. a kind of bottom device according to claim 9, it is characterised in that: the upper surface of the isometrical through-hole (15) is
Inverted round table shape forms chamfering structure design.
14. a kind of bottom device according to claim 9, it is characterised in that: the chamfer angle α range be 10 °~
30°。
15. a kind of bottom device according to claim 9, it is characterised in that: the through-hole (15) is for installing fuel rod
Or/and circulation cooling water, the fuel rod of the installation is annular fuel rod.
16. 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 anti-foreign matter component is claim
The described in any item anti-foreign matter components of 1-7.
17. a kind of fuel assembly according to claim 16, it is characterised in that: the bottom device (1) is claim
The described in any item bottom devices of 8-14.
18. 6 or 17 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 |
|---|---|---|---|
| CN201711369529.0A CN109935352A (en) | 2017-12-19 | 2017-12-19 | Fuel assembly and its bottom device and anti-foreign matter component applied to bottom device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369529.0A CN109935352A (en) | 2017-12-19 | 2017-12-19 | Fuel assembly and its bottom device and anti-foreign matter component applied to bottom device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109935352A true CN109935352A (en) | 2019-06-25 |
Family
ID=66983115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711369529.0A Pending CN109935352A (en) | 2017-12-19 | 2017-12-19 | Fuel assembly and its bottom device and anti-foreign matter component applied to bottom device |
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| CN (1) | CN109935352A (en) |
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