CN108231216A - A kind of composite type fuel component, nuclear reactor and assemble method - Google Patents
A kind of composite type fuel component, nuclear reactor and assemble method Download PDFInfo
- Publication number
- CN108231216A CN108231216A CN201711339454.1A CN201711339454A CN108231216A CN 108231216 A CN108231216 A CN 108231216A CN 201711339454 A CN201711339454 A CN 201711339454A CN 108231216 A CN108231216 A CN 108231216A
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- Prior art keywords
- fuel
- fuel assembly
- composite type
- bottom nozzle
- tube socket
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Classifications
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- 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
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- 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
- G21C3/331—Comprising hold-down means, e.g. springs
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- 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
- G21C3/334—Assembling, maintenance or repair of the bundles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a kind of composite type fuel component, nuclear reactor and assemble methods.Wherein, which includes：First fuel assembly, the second fuel assembly and the bindiny mechanism for being fixedly connected with first fuel assembly and the second fuel assembly in the axial direction.The first fuel assembly and the second fuel assembly of the present invention is fixedly connected in the axial direction by bindiny mechanism, so as to effectively reduce the axial length of the single component of the first fuel assembly and the second fuel assembly, so as to improve the safety of manufacture feasibility and reactor.
Description
Technical field
The present invention relates to a kind of nuclear power field more particularly to composite type fuel component, nuclear reactor and assembling sides
Method.
Background technology
In technical field of nuclear power, primary clustering of the fuel assembly as nuclear reactor, safety, stability are ten
Divide important.As shown in Figure 1, traditional fuel assembly includes rigid backbone and fuel rod 2.Wherein, rigid backbone includes mixing
Screen work 3, upper tube socket 1, bottom nozzle 5 and guide pipe 4.Mixing grillwork 3 is by the regularly arranged grid for being used to accommodate and clamp fuel rod 2
Member composition.Guide pipe 4 is longer than fuel rod 2, is stretched from the end of fuel rod 2, and is fixed on tube socket 1 and bottom nozzle 5.
Bottom nozzle 5 is located at the lower part of fuel assembly, and bottom nozzle 5 has some supporting legs and a matching disc, has some to be used for fixation and leads
To the duct of pipe 4 and the coolant flow passages of perforation.The upper tube socket 1 of the other end of fuel assembly, i.e. fuel assembly upper end, including one
A lateral matching disc has some to accommodate and the duct of fixed guide pipe 4 and perforative discharge orifice.Wherein fuel rod 2 is in rigidity
It is arranged in parallel and by even partition in skeleton, and the involucrum of every fuel rod 2 is integrally formed.
In the fuel assembly of the prior art, at least there are following defects：
Ratio of height to diameter is very high, and this special structure can cause its lateral stiffness very little, then under earthquake operating mode, in reactor
Adjacent fuel assembly can generate the impact force maximum of larger impact force, particularly fuel assembly middle section in core, most hold
Structural destruction is easily caused, influences the safety of reactor operation.
Because 2 involucrum of fuel rod and the difference of 4 structure of guide pipe, material, running temperature and neutron flux, can generate difference
Increment, simultaneously because clamping action of the grid spacer to fuel rod 2, therefore fuel rod 2 can bear direction phase with guide pipe 4
Anti- axial force, increment difference is bigger, this axial force is bigger.
The length of single fuel rod 2 is very long, many fuel pellets can be also loaded in a fuel rod 2, in entire fuel
In phase in longevity, more fission gas releases are had, cause the variation range bigger of 2 internal pressure of fuel rod, this can be whole to fuel rod 2
Structural intergrity design brings challenges.
The length of single fuel rod 2 is very long, thus involucrum is very longer, this can cause the increase of involucrum manufacturing process difficulty；
The difficulty of the very long assembling that can also give fuel rod 2 whole of 2 length of fuel rod and manufacture increases.
The length of single fuel rod 2 is very long, and this feature can cause to be stranded to 2 pull-rod of fuel rod of fuel assembly assembling process
Difficulty, the screen work number of plies that single 2 involucrum of fuel rod passes through can increase, the particularly newest fuel rod for first entering fuel assembly skeleton 2
Point, this can increase by 2 involucrum of fuel rod surface caused by screen work spring just convex blessing and scratch amplitude, and then increase the generation of zirconium bits
Amount, safety final or that reactor can be influenced.
Invention content
The technical problem to be solved in the present invention is, it is too long for the fuel rod of the prior art and the defects of cause, provide
A kind of composite type fuel component, nuclear reactor and assemble method.
The technical solution adopted by the present invention to solve the technical problems is：A kind of composite type fuel component is provided, including：The
One fuel assembly, the second fuel assembly and first fuel assembly and the second fuel assembly are fixed in the axial direction
The bindiny mechanism of connection.
Preferably, first fuel assembly includes tube socket on first, the first bottom nozzle, is arranged on tube socket on described first
And first the first screen work between bottom nozzle and be mounted on described first by first screen work clamping under tube socket and first
The first fuel rod group between tube socket；
Second fuel assembly includes tube socket, the second bottom nozzle on second, is arranged on tube socket and the second down tube on described second
Seat between the second screen work and by second screen work clamping be mounted on described second between tube socket and the second bottom nozzle
Second fuel rod group.
Preferably, the bindiny mechanism is included in first bottom nozzle tube socket side on described second and extends at least
One connecting pin and set on tube socket on described second, the link slot that locks with the connecting pin；And/or
The bindiny mechanism be included in at least connecting pin that tube socket extends to the first bottom nozzle side on described second,
And set on first bottom nozzle, the link slot that locks with the connecting pin.
Preferably, first bottom nozzle, tube socket is substantially square on second；
The connecting pin includes four, is separately positioned on first bottom nozzle and/or the second upper tube seats against the position in nearly corner
Put place；
The link slot includes four, is separately positioned on the side centre position of tube socket and/or the first bottom nozzle on described second.
Preferably, the connection that each connecting pin includes with tube socket is connect on first bottom nozzle and/or second
Portion, the head set in the connecting portion end and the stage portion formed between the head and connecting portion；
The link slot is included in the side wall of tube socket and/or the first bottom nozzle setting perforation inserting to side wall end face on described second
Enter portion, perforation is connected with the insertion section to the arc groove of the side wall end face and in the arc groove close to the side wall
The curved flanges of the side setting of end face；
The head and connecting portion enter the insertion section, and rotate and the head and connecting portion is caused to enter the arc groove,
The stage portion is locked on the inside of the curved flanges.
Preferably, the first fuel rod group and/or the second fuel rod group include several fuel rods；The length of the fuel rod
Degree is less than 4 meters；And the length after the first fuel rod group and the combination of the second fuel rod group is more than 4 meters.
Preferably, the composite type fuel component further includes one or more third fuel assemblies, the third fuel stack
Part is arranged between first fuel assembly and the second fuel assembly, and is set and first fuel assembly, the second fuel
Component and/or the adjacent third fuel assembly carry out the bindiny mechanism being fixedly connected on axial direction respectively.
The present invention also provides a kind of nuclear reactor, upper core plate, lower core plate and mounted on the upper core plate
Nuclear fuel assembly between lower core plate；It is characterized in that, the nuclear fuel assembly is including described in any one of the above embodiments compound
Type fuel assembly.
Preferably, it is radially solid by pin between tube socket and the upper core plate on the first of the composite type fuel component
Fixed connection；
Pass through the radially fixed connection of pin between second bottom nozzle of the composite type fuel component and the lower core plate.
The present invention also provides a kind of assemble method of composite type fuel component, for composite type fuel described in any of the above-described
Component；Including：The first fuel assembly and the second fuel assembly are fixedly connected in the axial direction by bindiny mechanism, form axis
To fixed integral structure.
Preferably, the head of the connecting pin of the composite type fuel component and connecting portion are entered from insertion section, rotation
First fuel assembly or the second fuel assembly so that the head and connecting portion enter arc groove, the step of the connecting pin
Portion is locked on the inside of the curved flanges of link slot.
The beneficial effects of the practice of the present invention is：The first fuel assembly and the second fuel assembly of the present invention passes through bindiny mechanism
It is fixedly connected in the axial direction, so as to effectively reduce the single component of the first fuel assembly and the second fuel assembly
Axial length, so as to improve the safety of manufacture feasibility and reactor.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the schematic diagram of the fuel assembly of the prior art；
Fig. 2 is the structure diagram of composite type fuel component one embodiment of the present invention；
Fig. 3 is the schematic diagram of first bottom nozzle of composite type fuel component one embodiment of the present invention；
Fig. 4 is the schematic diagram of tube socket on the second of composite type fuel component one embodiment of the present invention；
Fig. 5 is the schematic diagram of the assembling process of composite type fuel component one embodiment of the present invention.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific embodiment of the present invention.
Fig. 2-5 shows composite type fuel component one embodiment of the present invention, is fired including the first fuel assembly 10, second
Expect component 30 and bindiny mechanism.Can by the bindiny mechanism by the first fuel assembly 10, the second fuel assembly 30 in axial direction
It is fixedly connected on direction, so as to form the composite type fuel component of monoblock type.
Wherein, which includes tube socket 11 on first, the first bottom nozzle 12, is arranged on tube socket 11 on first
And first the first screen work 13 between bottom nozzle 12 and clamped by the first screen work 13 under tube socket on first 11 and first
The first fuel rod group 14 between tube socket 12.It should be understood that the tube socket 11 on first, the first bottom nozzle 12, the first screen work 13,
The various structures of the prior art may be used in first fuel rod group 14 etc., and this will not be repeated here.
Second fuel assembly 30 includes tube socket 31 on second, the second bottom nozzle 32, is arranged on tube socket 31 and second on second
The second screen work 33 between bottom nozzle 32 and 31 and second bottom nozzle 32 of tube socket on second is clamped by the second screen work 33
Between the second fuel rod group 34.It should be understood that tube socket 31, the second bottom nozzle 32, the combustion of the second screen work 33, second on second
The various structures of the prior art may be used in charge bar group 34 etc., and this will not be repeated here.
Wherein, the first fuel rod group 14, the second fuel rod group 34 can include several fuel rods by regular array, especially
, the length of the fuel rod can be that length is less than 4 meters；And after the first fuel rod group 14 and the combination of the second fuel rod group 34
Length is more than 4 meters.Certainly, which can also be the arbitrary fuel rod that greater depth can not be made because of technological problems.
As shown in the figure, the bindiny mechanism is arranged on the centre position of entire composite type fuel component, by the first fuel rod group
14 are fixedly connected in the axial direction with the second fuel rod group 34.In the present embodiment, which is included in the first bottom nozzle 12
Set on tube socket 31 to an at least connecting pin 51 for 31 side of tube socket on second extension and on second and connecting pin
The link slot 53 that nail 51 locks.It should be understood that in other embodiments, connecting pin 51 can also be arranged on second
Extend on upper tube socket 31 and to 12 side of the first bottom nozzle；Corresponding, link slot 53 is arranged on the first bottom nozzle 12 and with connecting
Outbound follows closely the locking of 51 corresponding matchings；Alternatively, connecting pin is set on tube socket 31 on the first bottom nozzle 12 and second respectively simultaneously
51, it is corresponding, while link slot 53 is set on second on 31 and first bottom nozzle 12 of tube socket respectively, connecting pin 51 is with connecting
The matching locking of slot 53.
As shown in the figure, tube socket 31 is substantially square on first bottom nozzle 12, second of the present embodiment, corresponding, connecting pin
Nail 51 includes four, is separately positioned on the first bottom nozzle 12 and/or second tube socket 31 at the position in corner；Link slot 53
Including four, it is separately positioned on the side centre position of 31 and/or first bottom nozzle 12 of tube socket on second.It it should be understood that should
The shape of tube socket 31 can design rectangular, round or other arbitrary shapes as needed on first bottom nozzle 12, second；And connect
Outbound nail 51, the position of link slot 53, quantity can also be adjusted according to actual needs.
In the present embodiment, as shown in figure 3, each connecting pin 51 includes connecting portion 511, set in 511 end of connecting portion
The head 512 put and the stage portion 513 formed between head 512 and connecting portion 511.When connecting pin 51 is arranged on
When on one bottom nozzle 12, which is fixedly connected with the first bottom nozzle 12, and connecting pin 51 is arranged on tube socket on second
When on 31, which is fixedly connected with tube socket on second 31.The size on the head 512 is more than the size of connecting portion 511,
Axial cross section shape formed it is "T"-shaped, so as to form the function of overhead kick, in the axial direction with link slot 53 formed hook,
Realize the positioning in axial direction.Certainly, the shape of connecting pin 51, structure can also be adjusted as needed, as long as can be real
Now axial hook.
As shown in figure 4, the link slot 53 is oppositely arranged with connecting pin 51, that is, under connecting pin 51 is arranged on first
During tube socket 12, which is arranged on second on tube socket 31；When connecting pin 51 is arranged on tube socket 31 on second, link slot
53 are arranged on the first bottom nozzle 12.The link slot 53 includes insertion section 531, arc groove 532 and curved flanges 533 etc..
Wherein, which is set on second on the side wall of 31 and/or first bottom nozzle 12 of tube socket, and opening is passed through
Side wall end face is passed to, in order to which connecting pin 51 is inserted into.The arc groove 532 is connected with insertion section 531 and is penetrated through to the end of side wall
Face, so as to when rotating the first bottom nozzle 12 so that connecting pin 51 can move in arc groove 532.Also, curved flanges
533 are set in arc groove 532 close to the side of side wall end face, can be supported with the stage portion 513 of connecting pin 51 and terminate in arc
The inside of flange 533 so that connecting pin 51 is difficult to deviate from from arc groove 532, and then realizes the first bottom nozzle 12 and
Axially position on two between tube socket 31.
It should be understood that the shape of the link slot 53, structure type can also be adjusted as needed, as long as can be real
It is now fixedly connected in the axial direction with connecting pin 51, realizes axially position.
Further, in some other embodiment, which can also include one or more thirds
Fuel assembly.The third fuel assembly can be arranged between the first fuel assembly 10 and the second fuel assembly 30, and can root
It is one or more according to needing to set, so as to adapt to various size requirement.It is corresponding, the third fuel assembly and the first fuel stack
Part 10, the second fuel assembly 30 can also directly set bindiny mechanism, be carried out on axial direction with adjacent fuel assembly respectively
Be fixedly connected.
The third fuel assembly includes tube socket, third bottom nozzle in third, is arranged on tube socket and third bottom nozzle in third
Between third screen work and third fuel rod between tube socket and third bottom nozzle in third is mounted on by the clamping of third screen work
Group.
It should be understood that the connection structure can include matched connecting pin 51, link slot 53 in above-described embodiment
Deng, it is separately positioned in third on tube socket and third bottom nozzle and sets, it is corresponding with tube socket 31 on the first bottom nozzle 12, second to connect
It connects, you can realize the axial limiting company of the first fuel assembly 10, the second fuel assembly 30, third fuel assembly in the axial direction
It connects.
In some embodiments of the nuclear reactor of the present invention, which includes upper core plate, lower heap
The composite type fuel component of core plate and above-mentioned any embodiment.The composite type fuel component is mounted on upper core plate and lower heap
Between core plate.It should be understood that the quantity of composite type fuel component can be configured according to actual needs.
Wherein, pass through the radially fixed connection of pin on the first of composite type fuel component between tube socket 11 and upper core plate；
It is whole so as to form by the radially fixed connection of pin between second bottom nozzle 32 of composite type fuel component and lower core plate
Nuclear reactor.
When composite type fuel component assembles, the first fuel assembly 10 and the second fuel assembly 30 are existed by bindiny mechanism
It is fixedly connected on axial direction, forms the integral structure of axial restraint.
Specifically, as shown in figure 5, by the first fuel assembly 10 and the second fuel assembly 30 of composite type fuel component
Heart centering, and be staggered 45 degree（It should be understood that the angle being staggered is related with the installation position of link slot 53 to connecting pin 51）；
First fuel assembly 10 is inserted perpendicularly into the second fuel assembly 30 and even at the cost of one's life, that is, by the connecting pin 51 of the first fuel assembly 10
Head 512 and connecting portion 511 enter from the insertion section 531 of the second fuel assembly 30；Then, by the first fuel assembly 10 or the
Two fuel assemblies 30 rotate 45 degree so that head 512 and connecting portion 511 enter arc groove 532, the stage portion of connecting pin 51
513 are locked to 533 inside of curved flanges of link slot 53, that is, realize the axial direction of the first fuel assembly 10, the second fuel assembly 30
It is locked.
It should be understood that when there is third fuel assembly, it again may be by similar assemble method and assembled, so as to shape
Integrated structure.
After composite type fuel component is packed into nuclear reactor, the radial position of the first fuel assembly 10 is by upper core plate pin
Nail is inserted on first in the location hole of tube socket 11, and the radial position of the second fuel assembly 30 is inserted into second by lower core plate pin
In the location hole of bottom nozzle 32.By the positioning of more than all directions, that is, complete to the axial direction of composite type fuel component entirety and
The positioning of radial direction.
In an embodiment of the present invention, the second of the first bottom nozzle 12 of the first fuel assembly 10 and the second fuel assembly 30
Upper tube socket 31 can be formed by hot investment casting, itself has very big rigidity and intensity, and general impact force cannot make at all
Its recurring structure destroys.In the fuel assembly of the prior art because height it is very high, lateral stiffness will very little,
If earthquake occurs in reactor operation when accident conditions, vibrations deformation, particularly fuel stack will occur for entire reactor core
The intermediate position distortions of part can be maximum, then the grid spacer at intermediate position will bear larger impact force, grid spacer one
As be made up of metal band of sheet metal process, intensity is relatively low, thus be easy for can recurring structure type destroy；By using this
After the composite type fuel component of inventive embodiments, the larger rigidity in engaging portion and intensity ensure that fuel assembly will not be broken
It is bad, improve the safety in operation of reactor.
In addition, composite type fuel component through the embodiment of the present invention, is caused too in power output not total to reactor
In the case of big influence, the length of single fuel rod can be shortened, after the length shortening of single fuel rod, it is many good to bring
Place：
Firstly, because fuel rod is clamped and be suspended in fuel assembly skeleton by grid spacer, and grid spacer and fuel
Component guide pipe is welded and fixed, this will lead to the problem of one because the structure of fuel rod and guide pipe, running temperature, material,
The difference of the neutron flux born etc. will result in the length difference in change of fuel rod and guide pipe（Thermal expansion is given birth to irradiation
It is long）, therefore fuel rod and the guide pipe axial force that bear direction opposite, increment difference is bigger, this axial force is bigger, Jin Erhui
Threaten the structural intergrity of fuel assembly；The embodiment of the present invention employs shorter fuel rod, then will grow this
Amount difference is fitted on two shorter fuel rods, then and increment difference is significantly reduced caused by every fuel rod, and then
Reduce due to axial force caused by this increment difference.
For the most of large pressurized water reactor being currently running in the world at present, the height of used prior art fuel rod
It is most of that longer fuel rod will bring certain challenge to the manufacture of involucrum at 4 meters or more, such as the straightness of cladding tubes,
Wall thickness uniformity etc., especially at present in the world in the state-of-the-art accident error-tolerance type cladding tubes ground, as Mo alloy claddings,
Composite material of silicon carbide involucrum etc., because of process aspect, there are some problems, lead to not in accurately control involucrum size
In the case of accomplish 4 meters or longer.
For the prior art, because fuel assembly is very high, in order to reliably clamp fuel rod, generally can all multilayer be set to determine
Position screen work accommodates fuel rod, and the blessings power of grid spacer is by its internal spring offer；In the manufacturing process of fuel assembly,
The leading assembly in the typically existing skeleton part in addition to fuel rod is completed, then by the form of pull-rod by fuel rod
It pulls in and fuel assembly is ultimately formed in skeleton；And the clamp springs in grid spacer scratch fuel rod clad, and can generate
A certain amount of bits body, when fuel assembly is higher, then the quantity of grid spacer is generally also more, then fuel rod leads to during pull-rod
The grid spacer quantity crossed is also more, then and more serious to scratching for fuel rod, the bits body of generation is also more, these
The final safety that can all influence reactor operation；Therefore, composite type fuel component through the embodiment of the present invention, can solve
The certainly above problem.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (11)
1. a kind of composite type fuel component, which is characterized in that including：Described in first fuel assembly, the second fuel assembly and general
The bindiny mechanism that first fuel assembly and the second fuel assembly are fixedly connected in the axial direction.
2. composite type fuel component according to claim 1, which is characterized in that first fuel assembly is included on first
Tube socket, the first bottom nozzle, the first screen work being arranged on described first between tube socket and the first bottom nozzle and by described first
Screen work clamping is mounted on the first fuel rod group on described first between tube socket and the first bottom nozzle；
Second fuel assembly includes tube socket, the second bottom nozzle on second, is arranged on tube socket and the second down tube on described second
Seat between the second screen work and by second screen work clamping be mounted on described second between tube socket and the second bottom nozzle
Second fuel rod group.
3. composite type fuel component according to claim 2, which is characterized in that the bindiny mechanism is included in described first
That bottom nozzle is set to an at least connecting pin for tube socket side extension on described second and on described second on tube socket,
The link slot locked with the connecting pin；And/or
The bindiny mechanism be included in at least connecting pin that tube socket extends to the first bottom nozzle side on described second,
And set on first bottom nozzle, the link slot that locks with the connecting pin.
4. composite type fuel component according to claim 3, which is characterized in that first bottom nozzle, tube socket on second
It is substantially square；
The connecting pin includes four, is separately positioned on first bottom nozzle and/or the second upper tube seats against the position in nearly corner
Put place；
The link slot includes four, is separately positioned on the side centre position of tube socket and/or the first bottom nozzle on described second.
5. composite type fuel component according to claim 3, which is characterized in that each connecting pin include with it is described
On first bottom nozzle and/or second tube socket connect connecting portion, the connecting portion end setting head and in the head
The stage portion formed between portion and connecting portion；
The link slot is included in the side wall of tube socket and/or the first bottom nozzle setting perforation inserting to side wall end face on described second
Enter portion, perforation is connected with the insertion section to the arc groove of the side wall end face and in the arc groove close to the side wall
The curved flanges of the side setting of end face；
The head and connecting portion enter the insertion section, and rotate and the head and connecting portion is caused to enter the arc groove,
The stage portion is locked on the inside of the curved flanges.
6. according to claim 2-5 any one of them composite type fuel components, which is characterized in that the first fuel rod group
And/or second fuel rod group include several fuel rods；The length of the fuel rod is less than 4 meters；And the first fuel rod group
Length after being combined with the second fuel rod group is more than 4 meters.
7. according to claim 2-5 any one of them composite type fuel components, which is characterized in that the composite type fuel component
One or more third fuel assemblies are further included, the third fuel assembly is arranged on first fuel assembly and the second fuel
Between component, and set and distinguish with first fuel assembly, the second fuel assembly and/or the adjacent third fuel assembly
Carry out the bindiny mechanism being fixedly connected on axial direction.
8. a kind of nuclear reactor, upper core plate, lower core plate and between the upper core plate and lower core plate
Nuclear fuel assembly；It is characterized in that, the nuclear fuel assembly includes claim 1-7 any one of them composite type fuel groups
Part.
9. nuclear reactor according to claim 8, which is characterized in that the first upper tube of the composite type fuel component
Pass through the radially fixed connection of pin between seat and the upper core plate；
Pass through the radially fixed connection of pin between second bottom nozzle of the composite type fuel component and the lower core plate.
10. a kind of assemble method of composite type fuel component, for any one of the claim 1-7 composite type fuel components；
It is characterised in that it includes：The first fuel assembly and the second fuel assembly are fixedly connected in the axial direction by bindiny mechanism,
Form the integral structure of axial restraint.
11. assemble method according to claim 10, which is characterized in that by the connecting pin of the composite type fuel component
Head and connecting portion enter from insertion section, rotate the first fuel assembly or the second fuel assembly so that the head and connection
Portion enters arc groove, and the stage portion of the connecting pin is locked on the inside of the curved flanges of link slot.
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|---|---|---|---|
| CN201711339454.1A CN108231216B (en) | 2017-12-14 | 2017-12-14 | A kind of composite type fuel component, nuclear reactor and assemble method |
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| CN201711339454.1A CN108231216B (en) | 2017-12-14 | 2017-12-14 | A kind of composite type fuel component, nuclear reactor and assemble method |
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| JPS56144885A (en) * | 1980-04-15 | 1981-11-11 | Hitachi Ltd | Manufacture of composite billet for covered tube of combined cover type fuel |
| CN1078064A (en) * | 1992-04-28 | 1993-11-03 | 弗兰克巴尔日燃料制造公司 | Be used for installing the method and apparatus of fuel rod at the nuclear fuel combined frame |
| CN1458653A (en) * | 2002-05-15 | 2003-11-26 | 西屋电气有限责任公司 | Fuel device and relative grid for nuclear reactor |
| CN102640230A (en) * | 2009-10-08 | 2012-08-15 | 法国原子能及替代能源委员会 | Body for a nuclear fuel assembly, and nuclear fuel assembly comprising such a body |
| US10060049B2 (en) * | 2013-03-14 | 2018-08-28 | Roger Ian Lounsbury | Method of making a joint between sapphire parts |
| JP2016200465A (en) * | 2015-04-08 | 2016-12-01 | 株式会社東芝 | Fuel rod and fuel assembly |
| CN205354666U (en) * | 2016-02-05 | 2016-06-29 | 中国核动力研究设计院 | Transfer device of fuel assembly and control rod subassembly |
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|---|---|
| CN108231216B (en) | 2019-08-30 |
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