CN106504799A - Fuel assembly and the base of fuel assembly - Google Patents
Fuel assembly and the base of fuel assembly Download PDFInfo
- Publication number
- CN106504799A CN106504799A CN201611084087.0A CN201611084087A CN106504799A CN 106504799 A CN106504799 A CN 106504799A CN 201611084087 A CN201611084087 A CN 201611084087A CN 106504799 A CN106504799 A CN 106504799A
- Authority
- CN
- China
- Prior art keywords
- orifice plate
- arcuate ribs
- base
- arch
- fuel assembly
- 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.)
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Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/33—Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/322—Means to influence the coolant flow through or around the bundles
-
- 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 present invention relates to the base of a kind of fuel assembly and fuel assembly, base includes the orifice plate that through hole is distributed with and the supporting mechanism for being arranged on orifice plate side；Supporting mechanism includes at least one arcuate ribs being arranged on orifice plate；Arcuate ribs are provided with arch opening away from the side of orifice plate, and the opening direction of arch opening is directed away from the side of orifice plate.Arch bridge type arcuate ribs are prevented effectively from stress concentration degree between orifice plate and supporting leg, allow bottom nozzle stress continuous distributed more uniform, so as to improving the intensity of bottom nozzle；In addition, cooling agent is from lower end to upstream, for the arcuate ribs of comparable size thickness, flow resistance violent change when the fluoran stream surface product of arch bridge type arcuate ribs is gradually changed axially upward, reduces cooling agent flowing, improve flow field；For the bottom nozzle of integration processing, the blank of removal is reduced, improve the utilization rate of material.
Description
Technical field
A kind of the present invention relates to Nuclear Plant, more particularly, it relates to the base of fuel assembly and fuel assembly.
Background technology
Fuel assembly structure of the prior art is made up of rigid backbone and fuel rod, as shown in figure 1, fuel rod is in rigidity
Arranged in parallel and by even partition in skeleton.Rigid backbone includes mixing grillwork 4, upper base 5, bottom nozzle 6 and guide pipe 7.Stir
Mixed screen work 4, is made up of the regularly arranged lattice cell for accommodating and clamping fuel rod.Grid spacer 10 and mixing grillwork 4 are in combustion
The axially spaced-apart of charge bar is arranged, and wears positioning for fuel rod.Guide pipe 7 is longer than fuel rod, and which is stretched out from the end of fuel bundle
Come, and be fixed on base 5 and bottom nozzle 6.Bottom nozzle 6 is located at the bottom of fuel assembly, with some supporting legs and one
Orifice plate 61, have on orifice plate 61 some for fixed guide pipe 7 duct and coolant flow passages penetrate the orifice plate 61.Fuel assembly
The upper base 5 of the other end, i.e. component upper end, including a horizontal orifice plate, has some receivings and fixed guide pipe 7 on orifice plate
Run through the orifice plate in duct and discharge orifice.
Generally, as shown in figure 13, bottom nozzle by a square orifice plate 61 and is located at band cross beam type immediately below its four angles
Support four connection compositions of support column 625 of floor 624, the structure allow and flow to fuel stack for cooling agent by the hole on orifice plate 61
The cavity of part.Two support columns 625 on 6 a pair of linea angulatas of bottom nozzle have dowel hole, for lower core plate on alignment pin
Assembling, to guarantee fuel assembly being accurately positioned in reactor core.
It is strip platy structure due to supporting floor 624, numerical analysis is carried out using Finite Element Method, in bottom nozzle 6
There is section change drastically between orifice plate 61 and support floor 624, as shown in figure 14, beam type down tube holder structure is present in right angle
Significantly stress concentration, result in and generate the heavily stressed of abrupt local in this place, and its peak stress is much larger than component entirety
Mean stress.Due to the stress concentration at this, the intensity of component bottom nozzle 6 will be weakened, reduce the bearing capacity of bottom nozzle 6.
In certain moon in 2004, building that certain nuclear power station turbine of Japan is located, the water pipe of No. 3 reactors of connection is burst suddenly, although the accident is simultaneously
Nuclear leakage is not resulted in, but steam explosion causes 5 workman's death, dozens injured.Cause of accident is steam generator inner tubule
Stress concentration result in pipeline crack, metal fatigue causes Crack Extension.Therefore, stress concentration has serious danger to component
Evil, it is necessary to design is optimized to the bottom nozzle 6 that there is stress concentration potential hazard, is cut with overcoming or reducing stress concentration
The impact of weak structure intensity.
In addition, present down tube holder structure can cause the cooling agent axial velocity that core plate flows out uneven, in existing skill
The beam type floor that art is adopted defines a big opening.Although the structure is favourable to pressure drop, it is unfavorable for even flow field, will causes
The inhomogeneities that cooling agent before 6 orifice plate 61 of bottom nozzle is present.
Further, in conjunction with shown in Figure 15, Figure 16, as cross beam type supports 624 changes of section of floor in sustained height, when
When cooling agent washes away floor section, it is mutated in soffit of girder position, the mutation for meeting flow section will cause crossing current violent change.
Content of the invention
The technical problem to be solved in the present invention is, there is provided the base of a kind of improved fuel assembly and fuel assembly.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of base of fuel assembly, its feature
It is, including the orifice plate of through hole being distributed with and being arranged on the supporting mechanism of the orifice plate side；The supporting mechanism includes arranging
At least one arcuate ribs on the orifice plate；The arcuate ribs are provided with arch opening away from the side of the orifice plate,
And the opening direction of the arch opening is directed away from the side of the orifice plate.
Preferably, the arcuate ribs are arranged between the outside of the orifice plate different directions.
Preferably, the arcuate ribs include the arcuate ribs for arranging in the first direction respectively with second direction.
Preferably, the arcuate ribs of the arcuate ribs of the first direction and the second direction are arranged in a crossed manner.
Preferably, the first direction includes that at least two arcuate ribs being arranged side by side, the second direction are included simultaneously
At least two arcuate ribs that row is arranged, each arcuate ribs form the dome structure of setting of arching upward to the orifice plate side.
Preferably, the supporting mechanism also includes the supporting leg is supported by the orifice plate；
The arcuate ribs include along the edge of the orifice plate be arranged on the circumferentially upper adjacent supporting leg of the orifice plate it
Between arcuate ribs；And/or,
The arcuate ribs include that being arranged on the orifice plate circumferentially goes up the arcuate ribs described in non-conterminous two between supporting leg.
Preferably, the arcuate ribs are platy structure, side corresponding with the orifice plate, supporting leg respectively with the hole
Plate, supporting leg connection.
Preferably, it is arranged on the arcuate ribs described in two between supporting leg to be structure as a whole with the supporting leg.
Preferably, the supporting mechanism is structure as a whole with the orifice plate；Or, the supporting mechanism is welded with the orifice plate
Form integrative-structure.
Preferably, the bottom of supporting leg described at least two is provided with lockhole.
Preferably, in being arranged on described in the arcuate ribs relatively corresponding two described in two between supporting leg between supporting leg
Line is symmetrical.
Preferably, the orifice plate is square, and the supporting leg includes four, is located at the corner of the orifice plate respectively；Or, described
Orifice plate be in polygon, the supporting leg include corresponding a plurality of with the side number of the orifice plate, and respectively be located at the orifice plate corner.
Preferably, if the arcuate profile of the arch opening is in turn connected to form along arch direction by main section.
Preferably, the arcuate profile of the arch opening include positioned at two ends segmental arc and be connected to described in two ends
Flat segments between segmental arc.
Preferably, the flat segments are parallel with the orifice plate.
Preferably, the arcuate profile of the arch opening is circular arc or arc.
Preferably, the cross-section facial contour of the arch opening is arc.
Preferably, the arch opening with the two opposite sides corresponding two edges of difference of the arcuate ribs, at least
Described in one, edge is provided with chamfering structure.
The present invention also constructs a kind of fuel assembly, including described base.
Implement the base of the fuel assembly and fuel assembly of the present invention, have the advantages that：The bottom nozzle of the present invention
Stress concentration degree between orifice plate and supporting leg can be prevented effectively from by arch bridge type arcuate ribs, the stress continuous distributed of bottom nozzle is allowed
More uniform, so as to improving the intensity of bottom nozzle；In addition, cooling agent is from lower end to upstream, for the arch of comparable size thickness
Shape floor, arch bridge type arcuate ribs fluoran stream surface product gradually change axially upward, reduces cooling agent flowing when flow resistance violent change,
Improve flow field；In addition, for the bottom nozzle of integration processing, reducing the blank of removal, the utilization rate of material is improved.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of the fuel assembly in the embodiment of the present invention；
Fig. 2 is the dimensional structure diagram of the bottom nozzle of the fuel assembly in the embodiment of the present invention；
Fig. 3 is the schematic perspective view of another angle of bottom nozzle in Fig. 2；
Fig. 4 is the structural representation when arch opening of arcuate ribs is sequentially connected for multistage line segment；
Fig. 5 be the arch opening of arcuate ribs two ends be arc when structural representation；
Fig. 6 be arcuate ribs arch opening be arc when structural representation；
Fig. 7 be arcuate ribs in Fig. 6 arch opening cross section be arc when A-A to structural representation；
Fig. 8 be arcuate ribs in Fig. 6 arch opening cross section carry fillet chamfering structure when A-A to structural representation
Figure；
Fig. 9 be arcuate ribs in Fig. 6 arch opening cross section carry oblique angle chamfering structure when A-A to structural representation
Figure；
Figure 10 is that the stress isobar when bottom nozzle in Fig. 2 carries out simulation analysis using Finite Element Method is distributed；
Figure 11 is the schematic cross-sectional view of the bottom nozzle with arch bridge type arcuate ribs in the embodiment of the present invention；
Figure 12 is the variation relation curve map between the fluoran stream surface and axial location of the bottom nozzle in Figure 11；
Figure 13 is the dimensional structure diagram of the bottom nozzle in background technology；
Figure 14 is that the stress isobar when bottom nozzle in Figure 13 carries out simulation analysis using Finite Element Method is distributed；
Figure 15 is the schematic cross-sectional view of the bottom nozzle in background technology；
Figure 16 is the variation relation curve map between the fluoran stream surface and axial location of the bottom nozzle in Figure 15.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now control accompanying drawing is described in detail
The specific embodiment of the present invention.
As shown in figure 1, the fuel assembly in a preferred embodiment of the invention is made up of rigid backbone and fuel rod, fuel
Rod is arranged in parallel in rigid backbone and by even partition.Rigid backbone includes mixing grillwork 4, upper base 5, bottom nozzle 6 and leads
To pipe 7.Mixing grillwork 4, is made up of the regularly arranged lattice cell for accommodating and clamping fuel rod.Grid spacer 10 and mix lattice
Frame 4 is arranged in the axially spaced-apart of fuel rod, wears positioning for fuel rod.Guide pipe 7 is longer than fuel rod, and which is from the end of fuel bundle
Portion stretches, and is fixed on base 5 and bottom nozzle 6.Upper base 5 is arranged on the upper end of fuel assembly, including one laterally
Up-hole plate, have on up-hole plate some receiving and fixed guide pipe 7 duct and discharge orifice run through the up-hole plate.Further,
The corresponding bottom nozzle 6 for fuel assembly of base of the fuel assembly of the present invention.
As shown in Figure 2 and Figure 3, bottom nozzle 6 and is arranged on the downside of orifice plate 61 including orifice plate 61 positioned at the bottom of fuel assembly
Supporting mechanism 62, supporting mechanism 62 includes four supporting legs 621 is supported by orifice plate 61.Corresponding, orifice plate 61 is square,
Four supporting legs 621 are located at the corner of orifice plate 61 respectively.In other embodiments, orifice plate 61 is alternatively other polygonal shapes,
The quantity of leg 621 is alternatively three or more than three other quantities, can guarantee that the balanced support to orifice plate 61, preferably
Ground, supporting leg 621 include corresponding a plurality of with the side number of orifice plate 61, and respectively be located at orifice plate 61 corner.
The bottom of two diagonal supporting legs 621 is provided with lockhole 622, for assembling with the alignment pin in lower core plate, with true
Protect fuel assembly being accurately positioned in reactor core.In other embodiments, lockhole also can be set on the supporting leg 621 of other positions
622, or lockhole 622 is set on multiple supporting legs 621.
Through hole 611 is distributed with orifice plate 61, and through hole 611 is included for the duct of fixed guide pipe 7 and for passing through with cooling agent
The coolant flow passages that orifice plate 61 flows through.Supporting leg 621 is located at the outer ring in 611 region of through hole, and supporting mechanism 62 also includes being arranged on logical
Arcuate ribs 623 in the circumference in 611 region of hole between the adjacent supporting leg 621 of two-phase, side of the arcuate ribs 623 away from orifice plate 61
Arch opening 6231 is provided with, and the opening direction of arch opening 6231 is directed away from the side of orifice plate 61.
Arch bridge type arcuate ribs 623 can be prevented effectively from stress concentration degree between orifice plate 61 and supporting leg 621, allow bottom nozzle 6
Stress continuous distributed is more uniform, so as to improving the intensity of bottom nozzle 6.In addition, cooling agent is from lower end to upstream, for equal
The arcuate ribs 623 of dimensional thickness, the fluoran stream surface product of arch bridge type arcuate ribs 623 are gradually changed axially upward, reduce cooling
Agent flow when flow resistance violent change, improve flow field.Simultaneously for the bottom nozzle of integration processing, the blank of removal is reduced, improved
The utilization rate of material.
In certain embodiments, arch is equipped between the adjacent supporting leg 621 of two-phase arbitrarily in the circumference in 611 region of through hole
Floor 623, allows the intensity of border of orifice plate 61 to get a promotion, increases balance, while reducing flow resistance when cooling agent flows
Violent change, improves flow field.Preferably, it is arranged between relatively corresponding two supporting leg 621 of the arcuate ribs 623 between two supporting legs 621
Center line symmetrical, allow and stress and reduce flow resistance violent change when cooling agent flows, improve flow field.
In other embodiments, arcuate ribs include being arranged on supporting leg 621 described in orifice plate 61 circumferential non-conterminous two it
Between arcuate ribs 623, allow arcuate ribs to be connected between two supporting legs by the side of orifice plate.
Further, each supporting leg 621 and 623 relative orifice plate 61 of arcuate ribs are symmetrical arranged, also can be with respect to 61 center of orifice plate
It is symmetrical arranged, it is ensured that make the stress of bottom nozzle 6 more balanced.
Preferably, arcuate ribs 623 are arranged along the outer ring in 611 region of through hole, it is to avoid installation and the cooling agent to guide pipe 7
Circulation impact.In other embodiments, arcuate ribs 623 also can be overlapped with through hole 611 in the axial direction, not shadow
Ring the installation of guide pipe 7 and the circulation of cooling agent.
In certain embodiments, supporting leg 621 is structure as a whole with arcuate ribs 623, increases bonding strength.Further,
Supporting mechanism 62 is also structure as a whole with orifice plate 61, can increase bonding strength.In other embodiments, supporting leg 621 and arched rib
Plate 623 is alternatively and is welded to connect, and supporting mechanism 62 is alternatively welding with orifice plate 61 and forms integrative-structure.
In certain embodiments, arcuate ribs 623 be platy structure, with orifice plate 61,621 corresponding side of supporting leg respectively with
Orifice plate 61, supporting leg 621 connect, and binding site is seamless, it is to avoid produce impact to the flowing of cooling agent.In other embodiments,
Arcuate ribs 623 are alternatively arch support bar structure or arch support structure.
Further, in certain embodiments, if as shown in figure 4, the arcuate profile of arch opening 6231 is by main section edge
Arch direction is in turn connected to form.In other embodiments, as shown in figure 5, the arcuate profile of arch opening 6231 is alternatively which
His shape, including the segmental arc 6232 positioned at two ends and the flat segments 6233 being connected between the segmental arc 6232 at two ends, excellent
Selection of land, flat segments 6233 are parallel with orifice plate 61, and the structure can reduce arcuate ribs 623 when the length of arcuate ribs 623 is longer
Height.Certainly, as shown in fig. 6, the arcuate profile of arch opening 6231 is circular arc or arc.
In certain embodiments, as shown in fig. 7, the cross-section facial contour of arch opening 6231 is arc, the stream of cooling agent is made
Logical more smooth, reduce the impulse force to arcuate ribs 623.In other embodiments, as shown in Figure 8, Figure 9, arch opening 6231
In the inside and outside corresponding two edges of two opposite sides difference of arcuate ribs 623, two edges are provided with chamfering structure, and chamfering structure can
For fillet or oblique angle.Certainly, also only on the corresponding edge in inside and outside two opposite sides wherein side of arcuate ribs 623 can arrange
Corner structure.
The force analysis with arch bridge type arcuate ribs 623 of the present invention belongs to plane stress problem, can adopt finite element side
Method carries out numerical analysis.To present example, in the case of identical span, uniform load and boundary condition, employ secondary
Quadrilateral units are compared to the girder structure of arch bridge type arcuate ribs 623 and the bottom nozzle in background technology, Tu10Wei
The stress isobar distribution of arch bridge type arcuate ribs 623, from fig. 4, it can be seen that the stress distribution of arch bridge type arcuate ribs 623 is more equal
Even, structural strength of the structural strength better than background technology bottom nozzle.
Can be obtained by comparative analysis, compared to the bottom nozzle of straight beam floor in background technology, with arch bridge type arcuate ribs
623 bottom nozzle 61 avoids the stress concentration of the abrupt change of cross-section so that the stress distribution of bottom nozzle is more uniform.
Further, the bottom nozzle 61 with arch bridge type arcuate ribs 623 of the invention can play a part of balanced flow field,
Compared to the bottom nozzle of straight beam floor in background technology, as shown in figure 11, present example arcuate ribs 623 meet flow section edge
On axial direction change be to seamlessly transit, corresponding, in conjunction with Figure 12 in fluoran stream surface product and axial location between relationship change figure, this
Invention example arcuate ribs 623 can play a part of balanced flow field.
In other embodiments, supporting mechanism 62 also can be to arcuate ribs 623 for including being arranged on orifice plate 61, arch
The ornaments direction of shape floor 623 does not limit, and can be the edge for being arranged on orifice plate 61, connects on the side that may also be arranged on orifice plate 61
It is connected between any both sides.Corresponding, arcuate ribs 623 are provided with arch opening 6231 away from the side of the orifice plate 61, and
The opening direction of the arch opening 6231 is directed away from the side of the orifice plate 61, allows arcuate ribs 623 being subject to from arch
When the cooling agent of the opening side of shape opening 6231 impacts, the intensity of orifice plate 61 is lifted, increases balance, while reducing cooling agent
Flow resistance violent change during flowing, improves flow field.
When arcuate ribs 623 include multiple, arcuate ribs 623 may also be arranged on the different directions of orifice plate 61 outside it
Between, allow arcuate ribs to be connected between the edge of diverse location by the side of orifice plate 61.The ornaments direction of multiple arcuate ribs 623
Can be with identical, also can be different, also can be arranged in a crossed manner.
In certain embodiments, arcuate ribs include the arcuate ribs 623 for arranging in the first direction respectively with second direction,
The quantity of the arcuate ribs 623 in each direction can not be limited.The arch of the arcuate ribs 623 and the second direction of first direction
Shape floor 623 is arranged in a crossed manner, and the arcuate ribs 623 of both direction can be intersected in the region of orifice plate 61, and crosspoint also may be used
At the edge of orifice plate 61, alternatively on the outside extended line direction of arcuate ribs 623.
Further, first direction includes that the two or more arcuate ribs 623 being arranged side by side, the second direction include
The two or more arcuate ribs 623 being arranged side by side, each arcuate ribs 623 are formed and are arched upward setting to 61 side of the orifice plate
Dome structure.Dome structure forms latticed structure, can increase the intensity of orifice plate 61, also can be opposite with orifice plate 61
The whole region of side reduces flow resistance violent change when cooling agent flows, and improves flow field.
It is to be appreciated that above-mentioned each technical characteristic can be used in any combination and unrestricted.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (19)
1. a kind of base of fuel assembly, it is characterised in that including through hole is distributed with（611）Orifice plate（61）Described with being arranged on
Orifice plate（61）The supporting mechanism of side（62）；The supporting mechanism（62）Including being arranged on the orifice plate（61）On at least one
Arcuate ribs；The arcuate ribs are away from the orifice plate（61）Side be provided with arch opening（6231）, and the arch opens
Mouthful（6231）Opening direction be directed away from the orifice plate（61）Side.
2. the base of fuel assembly according to claim 1, it is characterised in that the arcuate ribs are arranged on the orifice plate
（61）Between the outside of different directions.
3. the base of fuel assembly according to claim 2, it is characterised in that the arcuate ribs are included respectively along first
The arcuate ribs that direction and second direction are arranged（623）.
4. the base of fuel assembly according to claim 3, it is characterised in that the arcuate ribs of the first direction
（623）Arcuate ribs with the second direction（623）Arranged in a crossed manner.
5. the base of fuel assembly according to claim 4, it is characterised in that the first direction includes being arranged side by side
At least two arcuate ribs（623）, the second direction includes at least two arcuate ribs being arranged side by side（623）, each described
Arcuate ribs（623）Formed to the orifice plate（61）Arch upward the dome structure of setting for side.
6. the base of the fuel assembly according to any one of claim 1 to 5, it is characterised in that the supporting mechanism（62）
Also include to the orifice plate（61）The supporting leg being supported（621）；
The arcuate ribs are included along the orifice plate（61）Edge be arranged on the orifice plate（61）Adjacent described in circumference
Leg（621）Between arcuate ribs（623）；And/or,
The arcuate ribs include being arranged on the orifice plate（61）Supporting leg described in non-conterminous two in circumference（621）Between arch
Floor（623）.
7. the base of fuel assembly according to claim 6, it is characterised in that the arcuate ribs（623）Tie for tabular
Structure, with the orifice plate（61）, supporting leg（621）Corresponding side respectively with the orifice plate（61）, supporting leg（621）Connection.
8. the base of fuel assembly according to claim 6, it is characterised in that be arranged on supporting leg described in two（621）Between
The arcuate ribs（623）With the supporting leg（621）It is structure as a whole.
9. the base of fuel assembly according to claim 6, it is characterised in that the supporting mechanism（62）With the orifice plate
（61）It is structure as a whole；Or, the supporting mechanism（62）With the orifice plate（61）Welding forms integrative-structure.
10. the base of fuel assembly according to claim 6, it is characterised in that supporting leg described at least two（621）Bottom
Portion is provided with lockhole（622）.
The base of 11. fuel assemblies according to claim 6, it is characterised in that be arranged on supporting leg described in two（621）Between
The arcuate ribs（623）With respect to supporting leg described in corresponding two（621）Between center line symmetrical.
The base of 12. fuel assemblies according to claim 6, it is characterised in that the orifice plate（61）It is square, described
Leg（621）Including four, the orifice plate is located at respectively（61）Corner；Or, the orifice plate（61）In polygon, the supporting leg
（621）Including with the orifice plate（61）Side number corresponding a plurality of, and respectively be located at the orifice plate（61）Corner.
The base of 13. fuel assemblies according to claim 6, it is characterised in that the arch opening（6231）Arch
If profile is in turn connected to form along arch direction by main section.
The base of 14. fuel assemblies according to claim 6, it is characterised in that the arch opening（6231）Arch
Profile includes the segmental arc positioned at two ends（6232）And it is connected to the segmental arc at two ends（6232）Between flat segments
（6233）.
The base of 15. fuel assemblies according to claim 14, it is characterised in that the flat segments（6233）With the hole
Plate（61）Parallel.
The base of 16. fuel assemblies according to claim 6, it is characterised in that the arch opening（6231）Arch
Profile is circular arc or arc.
The base of 17. fuel assemblies according to claim 6, it is characterised in that the arch opening（6231）Cross-section
Facial contour is arc.
The base of 18. fuel assemblies according to claim 6, it is characterised in that the arch opening（6231）With described
Arcuate ribs（623）Two opposite sides distinguish in corresponding two edges, at least described in one, edge is provided with chamfering structure.
19. a kind of fuel assemblies, it is characterised in that including the base described in any one of claim 1 to 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611084087.0A CN106504799B (en) | 2016-11-30 | 2016-11-30 | The tube socket of fuel assembly and fuel assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611084087.0A CN106504799B (en) | 2016-11-30 | 2016-11-30 | The tube socket of fuel assembly and fuel assembly |
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| Publication Number | Publication Date |
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| CN106504799A true CN106504799A (en) | 2017-03-15 |
| CN106504799B CN106504799B (en) | 2018-04-17 |
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| CN201611084087.0A Active CN106504799B (en) | 2016-11-30 | 2016-11-30 | The tube socket of fuel assembly and fuel assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018098703A1 (en) * | 2016-11-30 | 2018-06-07 | 中广核研究院有限公司 | Fuel assembly and tube base thereof |
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| US4996021A (en) * | 1990-05-29 | 1991-02-26 | Combustion Engineering, Inc. | Bottom nozzle to guide tube connection |
| CN202615804U (en) * | 2012-05-14 | 2012-12-19 | 中科华核电技术研究院有限公司 | Lower tube base and bottom device |
| CN202650556U (en) * | 2012-07-19 | 2013-01-02 | 中国核动力研究设计院 | Nuclear fuel assembly lower tube socket with filter plate |
| CN102867547A (en) * | 2012-09-18 | 2013-01-09 | 中科华核电技术研究院有限公司 | Lower pipe seat and bottom device of light-water reactor nuclear fuel assembly |
| CN103021477A (en) * | 2012-11-26 | 2013-04-03 | 中国核动力研究设计院 | Lower pipe base of reactor fuel assembly |
| CN103337262A (en) * | 2013-06-18 | 2013-10-02 | 中国核动力研究设计院 | A kind of bottom nozzle with filtration foreign matter function |
| CN104538064A (en) * | 2014-12-19 | 2015-04-22 | 上海核工程研究设计院 | Fuel assembly lower pipe seat for balancing flow rate of coolant at reactor core inlet |
| CN206271424U (en) * | 2016-11-30 | 2017-06-20 | 中广核研究院有限公司 | The base of fuel assembly and fuel assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018098703A1 (en) * | 2016-11-30 | 2018-06-07 | 中广核研究院有限公司 | Fuel assembly and tube base thereof |
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| CN106504799B (en) | 2018-04-17 |
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