CN108231216B - 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
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- CN108231216B CN108231216B CN201711339454.1A CN201711339454A CN108231216B CN 108231216 B CN108231216 B CN 108231216B CN 201711339454 A CN201711339454 A CN 201711339454A CN 108231216 B CN108231216 B CN 108231216B
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- fuel
- fuel assembly
- bottom nozzle
- tube socket
- composite type
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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: the 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.First fuel assembly and the second fuel assembly of the invention is fixedly connected in the axial direction by bindiny mechanism, so as to effectively reduce the first fuel assembly and the second fuel assembly single component axial length, thus improve manufacture feasibility and reactor safety.
Description
Technical field
The present invention relates to nuclear power field more particularly to a kind of composite type fuel components, nuclear reactor and assembling side
Method.
Background technique
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 regularly arranged for accommodating and clamping the grid of fuel rod 2
Member composition.Guide pipe 4 is longer than fuel rod 2, stretches 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 and some are used to fixation and lead
To the duct of pipe 4 and the coolant flow passages of perforation.The other end of fuel assembly, the i.e. upper tube socket 1 of fuel assembly upper end, including one
A lateral matching disc has the duct and perforative discharge orifice of some receivings and fixed guide pipe 4.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 have the following deficiencies:
Ratio of height to diameter is very high, and this special structure will cause its lateral stiffness very little, then reacting under earthquake operating condition
Adjacent fuel assembly can generate the impact force maximum of biggish impact force, especially fuel assembly middle section in heap reactor core,
It is easiest to cause structural destruction, influences the safety of reactor operation.
Because the difference of 2 involucrum of fuel rod and 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 of 2 internal pressure of fuel rod bigger, 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 will cause the increase of involucrum manufacturing process difficulty；
2 length of fuel rod is very long also to be increased to the difficulty of the whole assembly of fuel rod 2 and manufacture.
The length of single fuel rod 2 is very long, this feature can 2 pull-rod of fuel rod to fuel assembly assembling process cause to be stranded
Difficulty, the screen work number of plies that single 2 involucrum of fuel rod passes through will increase, the especially newest fuel rod for first entering fuel assembly skeleton 2
Point, this will increase 2 involucrum of fuel rod because caused by screen work spring just convex aid surface scratch amplitude, and then increase the generation of zirconium bits
Amount, finally still will affect the safety of reactor.
Summary of the invention
The technical problem to be solved in the present invention is that it is too long for the fuel rod of the prior art and caused by defect, 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: providing a kind of composite type fuel component, comprising: 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, tube socket is arranged on described first
And first the first screen work between bottom nozzle and be mounted on described first under tube socket and first by first screen work clamping
The first fuel rod group between tube socket；
Second fuel assembly includes tube socket on second, the second bottom nozzle, tube socket and second is arranged on described second
The second screen work between bottom nozzle and by second screen work clamping be mounted on described second tube socket and the second bottom nozzle it
Between the second fuel rod group.
Preferably, the bindiny mechanism includes extending at least in first bottom nozzle to tube socket side on described second
One connecting pin and link slot being arranged on tube socket on described second, being locked with the connecting pin；And/or
The bindiny mechanism includes at least one connection that tube socket extends to first bottom nozzle side on described second
Pin and link slot being arranged on first bottom nozzle, being locked 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 nearly corner
Position at；
The link slot includes four, is separately positioned on described second among the side of tube socket and/or the first bottom nozzle
Position.
Preferably, each connecting pin includes and tube socket is connect on first bottom nozzle and/or second connection
Portion, the head in interconnecting piece end setting and the stage portion that is formed between the head and interconnecting piece；
The link slot include on described second the side wall of tube socket and/or the first bottom nozzle setting perforation to side wall end face
Insertion section, be connected to the insertion section perforation to the arc groove of the side wall end face and in the arc groove close to described
The curved flanges of the side setting of side wall end face；
The head and interconnecting piece enter the insertion section, and rotate so that the head and interconnecting piece enter the arc
Slot, the stage portion are 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 greater 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 arranged 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 it is mounted on the upper core plate
Nuclear fuel assembly between lower core plate；It is characterized in that, the nuclear fuel assembly includes described in any of the above embodiments compound
Type fuel assembly.
Preferably, 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 methods of composite type fuel component, for composite type fuel described in any of the above-described
Component；Include: to be fixedly connected with the first fuel assembly and the second fuel assembly in the axial direction by bindiny mechanism, forms axis
To fixed integral structure.
Preferably, the head of the connecting pin of the composite type fuel component and interconnecting piece are entered from insertion section, rotation
First fuel assembly or the second fuel assembly, so that the head and interconnecting piece 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 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, to improve the safety of manufacture feasibility and reactor.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the schematic diagram of the fuel assembly of the prior art；
Fig. 2 is the structural schematic diagram of composite type fuel component one embodiment of the invention；
Fig. 3 is the schematic diagram of first bottom nozzle of composite type fuel component one embodiment of the invention；
Fig. 4 is the schematic diagram of tube socket on the second of composite type fuel component one embodiment of the invention；
Fig. 5 is the schematic diagram of the assembling process of composite type fuel component one embodiment of the 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
A specific embodiment of the invention.
Fig. 2-5 shows composite type fuel component one embodiment of the invention, including the combustion of 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, to form the composite type fuel component of monoblock type.
Wherein, which includes tube socket 11 on first, the first bottom nozzle 12, tube socket 11 is arranged on first
And first the first screen work 13 between bottom nozzle 12 and be mounted on first under tube socket 11 and first by the clamping of the first screen work 13
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,
First fuel rod group 14 etc. can use the various structures of the prior art, and this will not be repeated here.
Second fuel assembly 30 includes tube socket 31 on second, the second bottom nozzle 32, tube socket 31 and second is arranged on second
The second screen work 33 between bottom nozzle 32 and tube socket 31 and the second bottom nozzle 32 on second are mounted on by the clamping of 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
Charge bar group 34 etc. can use the various structures of the prior art, and this will not be repeated here.
Wherein, the first fuel rod group 14, the second fuel rod group 34 may include several fuel rods by regular array, especially
, the length of the fuel rod can be length less than 4 meters；And after the first fuel rod group 14 and the combination of the second fuel rod group 34
Length is greater than 4 meters.Certainly, which can also be any fuel rod that greater depth can not be made into because of technological problems.
As shown, the middle position of entire composite type fuel component is arranged in the bindiny mechanism, 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
On to second 31 side of tube socket extend an at least connecting pin 51 and be arranged on tube socket 31 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 second
Extend on upper tube socket 31 and to 12 side of the first bottom nozzle；It is corresponding, link slot 53 be arranged on the first bottom nozzle 12 and with even
Outbound follows closely the locking of 51 corresponding matchings；Alternatively, connecting pin is arranged 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 tube socket 31 and the first bottom nozzle 12 on second respectively, connecting pin 51 with connect
The matching locking of slot 53.
As shown, 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 middle position of tube socket 31 and/or the first bottom nozzle 12 on second.It should be understood that should
The shape of tube socket 31, which can according to need, on first bottom nozzle 12, second designs rectangular, round or other arbitrary shapes；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 is set including interconnecting piece 511, in 511 end of interconnecting piece
The head 512 set and the stage portion 513 formed between head 512 and interconnecting piece 511.When the setting of connecting pin 51 is the
When on one bottom nozzle 12, which is fixedly connected with the first bottom nozzle 12, and tube socket is arranged on second in connecting pin 51
When on 31, which is fixedly connected with tube socket 31 on second.The size on the head 512 is greater than the size of interconnecting piece 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, structure of connecting pin 51, which also can according to need, is adjusted, 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, when connecting pin 51 is arranged under first
When tube socket 12, which is arranged on second on tube socket 31；The link slot in tube socket 31 on second is arranged in connecting pin 51
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 arranged on the side wall of tube socket 31 and/or the first bottom nozzle 12 on second, and opening is passed through
Side wall end face is passed to, in order to the insertion of connecting pin 51.The arc groove 532 is connected to insertion section 531 and penetrates through to the end of side wall
Face, to allow connecting pin 51 to move in arc groove 532 when rotating the first bottom nozzle 12.Also, curved flanges
533 are arranged in arc groove 532 close to the side of side wall end face, and the stage portion 513 that can connect pin 51, which can support, terminates 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, structure form of the link slot 53 also can according to need and be adjusted, 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 set between the first fuel assembly 10 and the second fuel assembly 30, and can root
It is one or more according to needing to be arranged, to adapt to various size requirement.It is corresponding, the third fuel assembly and the first fuel stack
Directly bindiny mechanism also can be set in part 10, the second fuel assembly 30, carries out on axial direction with adjacent fuel assembly respectively
Be fixedly connected.
The third fuel assembly includes tube socket in third, third bottom nozzle, tube socket and third bottom nozzle is arranged in third
Between third screen work and third fuel rod in third between tube socket and third bottom nozzle is mounted on by the clamping of third screen work
Group.
It should be understood that the connection structure may include the connecting pin 51 matched in above-described embodiment, link slot 53
Deng, it is separately positioned in third on tube socket and third bottom nozzle and is arranged, it is corresponding with tube socket 31 on the first bottom nozzle 12, second to connect
It connects, 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 nuclear reactor of the 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；
By the radially fixed connection of pin between the second bottom nozzle 32 and lower core plate of composite type fuel component, to organize integral
Nuclear reactor.
In the assembling of composite type fuel component, 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 it is staggered 45 degree (it should be understood that the angle being staggered is related with the setting 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 interconnecting piece 511 from the insertion section 531 of the second fuel assembly 30 enter；Then, by the first fuel assembly 10 or the
Two fuel assemblies 30 rotate 45 degree, so that head 512 and interconnecting piece 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 again may be by similar assemble method when there is third fuel assembly and assembled, thus 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
In nail insertion first in the location hole of tube socket 11, and the radial position of the second fuel assembly 30 is by lower core plate pin insertion second
In the location hole of bottom nozzle 32.By the positioning of the above all directions, that is, complete to the axial direction of composite type fuel component entirety and
Radial positioning.
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 the accident conditions such as earthquake occur in reactor operation, vibration deformation, especially 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 biggish impact force, grid spacer one
As be made up of metal band of sheet metal process, intensity is lower, thus be easy for can recurring structure type destroy；By using this
After the composite type fuel component of inventive embodiments, the biggish 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 where big influence, the length of single fuel rod can be shortened, after the length of single fuel rod shortens, it is many good to bring
Place:
Firstly, because fuel rod be by grid spacer clamp and be suspended in fuel assembly skeleton, and grid spacer with
Fuel assembly 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, receiving neutron flux etc. difference, will result in length difference in change (thermal expansion and the spoke of fuel rod and guide pipe
According to growth), therefore fuel rod and guide pipe can bear contrary axial force, increment difference is bigger, this axial force is bigger, into
And the structural intergrity of fuel assembly can be threatened；The embodiment of the present invention uses shorter fuel rod, then will be by this
Increment difference is fitted on two shorter fuel rods, then increment difference caused by every fuel rod is significantly reduced,
And then reduce the axial force as 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, for example, cladding tubes straightness,
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 cladding,
Composite material of silicon carbide involucrum etc. leads to not because process aspect is there are some problems 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, it is fixed that multilayer generally can be all set
Position screen work accommodates fuel rod, and the aid power of grid spacer is by its internal spring offer；In the manufacturing process of fuel assembly,
The typically leading assembly in the existing skeleton part in addition to fuel rod is completed, then by fuel rod by way of pull-rod
It pulls in and ultimately forms fuel assembly 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 is logical when pull-rod
The grid spacer quantity crossed is also more, then more serious to scratching for fuel rod, the bits body of generation is also more, these
It finally can all influence the safety of reactor operation；Therefore, composite type fuel component through the embodiment of the present invention, can solve
The certainly above problem.
The above is only a preferred embodiment of the present invention, 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 (10)
1. a kind of composite type fuel component characterized by comprising the first fuel assembly, the second fuel assembly and will be described
The bindiny mechanism that first fuel assembly and the second fuel assembly are fixedly connected in the axial direction；
First fuel assembly includes tube socket on first, the first bottom nozzle, tube socket and the first down tube is arranged on described first
Seat between the first screen work and by first screen work clamping be mounted on described first between tube socket and the first bottom nozzle
First fuel rod group；
Second fuel assembly includes tube socket on second, the second bottom nozzle, tube socket and the second down tube is arranged 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.
2. composite type fuel component according to claim 1, which is characterized in that the bindiny mechanism is included in described first
That bottom nozzle is arranged on tube socket to an at least connecting pin for tube socket side extension on described second and on described second,
The link slot locked with the connecting pin；And/or
The bindiny mechanism include at least connecting pin that tube socket extends to first bottom nozzle side on described second,
And link slot being arranged on first bottom nozzle, being locked with the connecting pin.
3. composite type fuel component according to claim 2, 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
Set place；
The link slot includes four, is separately positioned on the side middle position of tube socket and/or the first bottom nozzle on described second.
4. composite type fuel component according to claim 2, which is characterized in that each connecting pin include with it is described
On first bottom nozzle and/or second tube socket connect interconnecting piece, the interconnecting piece end setting head and in the head
The stage portion formed between portion and interconnecting piece；
The link slot includes the side wall of tube socket and/or the first bottom nozzle setting perforation the inserting to side wall end face on described second
Enter portion, be connected to perforation 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 interconnecting piece enter the insertion section, and rotate so that the head and interconnecting piece enter the arc groove,
The stage portion is locked on the inside of the curved flanges.
5. according to the described in any item composite type fuel components of claim 2-4, 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
It is greater than 4 meters with the length after the combination of the second fuel rod group.
6. according to the described in any item composite type fuel components of claim 2-4, which is characterized in that the composite type fuel component
It further include one or more third fuel assemblies, the third fuel assembly is arranged in first fuel assembly and the second fuel
Between component, and it is arranged and distinguishes 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.
7. a kind of nuclear reactor, including upper core plate, lower core plate and it is mounted on the upper core plate and lower core plate
Between nuclear fuel assembly；It is characterized in that, the nuclear fuel assembly includes compound combustion described in any one of claims 1-6
Expect component.
8. nuclear reactor according to claim 7, 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.
9. a kind of assemble method of composite type fuel component, for any one of the claim 1-6 composite type fuel component；Its
It is characterized in that, comprising: be fixedly connected with the first fuel assembly and the second fuel assembly in the axial direction by bindiny mechanism, shape
At the integral structure of axial restraint.
10. assemble method according to claim 9, which is characterized in that the composite type fuel component includes claim
The described in any item connecting pins of 2-6 and link slot, insertion section as claimed in claim 4 and arc groove；
The head of the connecting pin and the interconnecting piece are entered from the insertion section, rotate first fuel assembly or institute
The second fuel assembly is stated, so that the head and the interconnecting piece enter the arc groove, the stage portion card of the connecting pin
It terminates on the inside of the curved flanges of the 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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| CN108231216B true CN108231216B (en) | 2019-08-30 |
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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 |
| FR2690554B1 (en) * | 1992-04-28 | 1994-07-08 | Fabrication Combustibles Ste Fra | DEVICE AND METHOD FOR MOUNTING PENCILS IN A NUCLEAR FUEL ASSEMBLY SKELETON. |
| US6819733B2 (en) * | 2002-05-15 | 2004-11-16 | Westinghouse Electric Company Llc | Fuel assembly and associated grid for nuclear reactor |
| FR2951312B1 (en) * | 2009-10-08 | 2011-12-09 | Commissariat Energie Atomique | NUCLEAR FUEL ASSEMBLY BODY 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 |
| JP6666072B2 (en) * | 2015-04-08 | 2020-03-13 | 株式会社東芝 | Fuel rods and fuel assemblies |
| 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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|---|---|
| CN108231216A (en) | 2018-06-29 |
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