CN207233398U - Reactor core structure - Google Patents
Reactor core structure Download PDFInfo
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- CN207233398U CN207233398U CN201721213816.8U CN201721213816U CN207233398U CN 207233398 U CN207233398 U CN 207233398U CN 201721213816 U CN201721213816 U CN 201721213816U CN 207233398 U CN207233398 U CN 207233398U
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- fuel component
- reactor core
- movable fuel
- movable
- core structure
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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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Abstract
Reactor core structure is the utility model is related to, reactor core display structure includes fixed fuel component, movable fuel component and driving mechanism.Fixed fuel component includes some first fuel rods being arranged side by side, and pilot hole is formed after some first fuel rod arrangements, the guide cylinder being oriented to movable fuel component is equipped with pilot hole.Movable fuel component includes some second fuel rods being arranged side by side, movable fuel component can movably coordinate with guide cylinder between the first position and the second position vertically, movable fuel component is at first position, movable fuel component is inserted into pilot hole, movable fuel component is at the second place, movable fuel component abjection pilot hole.Driving mechanism coordinates with movable fuel component, and the driving force moved to first position is provided to movable fuel component, and movable fuel component can also be moved to the second place to be resetted, easy to minimize the start-up and shut-down control of reactor core.
Description
Technical field
Nuclear power field is the utility model is related to, more specifically to a kind of reactor core structure.
Background technology
Nuclear energy receives the very big attention of modern society as cleaning, green energy resource efficiently, safe.Develop safe kernel
The grand strategy that current various countries solve energy deficiency, response environment deterioration and climate warming can be become.From the point of view of world wide,
The application field of nuclear energy constantly expands, there is provided the nuclear reactor size of power also tends to minimize, commercial from large-sized power station
Presurized water reactor, exists to the nuclear power heap peculiar to vessel for ship power, then to the marine floating heap that electric energy is provided for island, its heap molded dimension
Constantly reduce, the appearance of each size nuclear reactor also causes nuclear energy to apply more flexibility, variation.
Common pressurized water reactor, it opens heap, shutdown process is realized mainly by poisonous substance control methods, and typical method is profit
Control rod is made with the very high material of absorption cross-section, is cooperated by control rod action and other reactive control methods, into
And realize and open heap and shutdown process.But for small-sized or microminiature reactor, its in start and stop heap and power adjustment procedure such as
The method that fruit uses control rod, on the one hand can bring great difficulty of processing, it is difficult to realize, on the other hand can cause neutron flux
Nonunf ormity increases.
" gun-type " atom bomb is divided into several bulks before ignition, knocking fuel, and every piece of quality maintains critical following.Ignite
When fuel slug is combined rapidly, reach critical mass, ignited." spadger " atom bomb thrown in Hiroshima is a fritter
High degree of enrichment is penetrated on another bulk target fuel of ring fuel crossover gun barrel directive, so as to reach enough critical masses.
" " the final application target of atom bomb is that high degree of enrichment fuel slug is quickly realized overcritical to gun-type, and completion was exploded
Journey, quick release heat, causes fragmentation effect, although with opening heap process, itself there is no the control of reactor core reactivity and
The concept of shutdown.Energy source of the microminiature reactor as a kind of controllable and slow release heat, has extremely wide application
Prospect, is necessarily required to a kind of safely and effectively start and stop heap control structure and mode.
C＆P systems are a kind of instruments of quick control reactivity, are widely used, are starting in commercial nuclear power plant
The absorptivity of neutron mainly is reduced by lifting the modes such as control rod during reactor, introduce positive reactivity to reactor core opens to realize
Heap process, and negative reactivity is introduced then by C＆P systems quick insertion reactor core under accident conditions, reactor is promptly stopped
Heap, ensures nuclear safety.
Control and start and stop heap process of the C＆P systems for large reactor reactor core reactivity have irreplaceable work
With, but for the reactor of miniaturization, or even smaller size of microminiature reactor, the method for control rod, on the one hand can bring
Great difficulty of processing, on the other hand can cause Neutron flux distribution inhomogeneities to increase, without applicability.
Utility model content
The technical problems to be solved in the utility model is, for microminiature reactor, there is provided a kind of new reactor
Core structure.
Technical solution is used by the utility model solves its technical problem：A kind of reactor core structure is constructed, is wrapped
Include fixed fuel component, movable fuel component and driving mechanism；
The fixed fuel component includes some first fuel rods being arranged side by side, after some first fuel rod arrangements
Pilot hole is formed, the guide cylinder being oriented to the movable fuel component, the movable fuel group are equipped with the pilot hole
Part can axially pull and push in the guide cylinder；
The movable fuel component includes some second fuel rods being arranged side by side, and the movable fuel component can be vertically
Movably coordinate between the first position and the second position with the guide cylinder, the movable fuel component is in the first position
When, the movable fuel component is inserted into the guide cylinder, and the movable fuel component is at the second place, the mobile combustion
Expect that component deviates from the guide cylinder；
The driving mechanism coordinates with the movable fuel component, is provided to the movable fuel component to described first
Put mobile driving force.
Preferably, the middle part after some first fuel rod arrangements is vacated, and forms the pilot hole.
Preferably, the endoporus shape of the guide cylinder is more than the section shape of the movable fuel component.
Preferably, the side wall of the guide cylinder is equipped with effluent hole.
Preferably, the driving mechanism includes the drive rod that one end is connected with the movable fuel component, the drive rod
Positioned at the described one end of movable fuel component away from the pilot hole.
Preferably, the reactor core structure further includes resetting-mechanism, the resetting-mechanism and the movable fuel group
Part coordinates, and the reset force moved to the second place is provided to the movable fuel component.
Preferably, the resetting-mechanism includes providing the elastic force moved to the second place to the movable fuel component
Resetting spring.
Preferably, the resetting-mechanism is arranged on the described one end of movable fuel component away from the pilot hole.
Preferably, the reactor core structure further includes the reflection for the peripheral border for being arranged on the solid fuel component
Layer.
Preferably, the reflecting layer includes sliding reflection layer or rotary drum reflecting layer.
Preferably, the upper and lower ends of the fixed fuel component are respectively equipped with upper mounted plate, bottom plate.
Implement the reactor core structure of the utility model, have the advantages that：The reactor of the utility model
Cored structure eliminates C＆P systems, and reactor core internal structure design can add fuel without considering the arrangement of control rod
The diversity and alternative of structure type, critical, its security reliability higher, it is possible to achieve reactor core is controlled by mass separation
The less reactor control of diameter, it is simple with structure type, it is easy to process, the features such as being widely used.
There is accident conditions, it is necessary to during emergency shut-down, which can utilize resetting-mechanism that movable fuel component is quick
Reactor core is pulled out, completes scram operation.
Brief description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is movable fuel component the cuing open at first position of the reactor core structure in the utility model embodiment
Face structure diagram；
Fig. 2 is movable fuel component the cuing open at the second place of the reactor core structure in the utility model embodiment
Face structure diagram.
Embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, it is detailed now to compare attached drawing
Illustrate specific embodiment of the present utility model.
Fixed fuel component 1 includes some first fuel rods 11 being arranged side by side, shape after some first fuel rods 11 are arranged
Into pilot hole 12.Preferably, the middle part after some first fuel rods 11 are arranged is vacated, and pilot hole 12 is formed, in other embodiment
In, pilot hole 12 may also deviate from centrally disposed.The guide cylinder 6 being oriented to movable fuel component 2 is equipped with pilot hole 12, is moved
Dynamic fuel assembly 2 can axially pull and push in guide cylinder 6.
Movable fuel component 2 includes some second fuel rods 21 for being arranged side by side, and movable fuel component 2 can be vertically the
Movably coordinate between one position and the second place with guide cylinder 6.
For movable fuel component 2 at first position, movable fuel component 2 is inserted into guide cylinder 6, and movable fuel component 2 is the
During two positions, movable fuel component 2 deviates from guide cylinder 6.
Driving mechanism 3 coordinates with movable fuel component 2, and the driving moved to first position is provided to movable fuel component 2
Power.Resetting-mechanism 4 coordinates with movable fuel component 2, and the reset force moved to the second place is provided to movable fuel component 2.
In other embodiment, resetting-mechanism 4 can also be cancelled, then by driving mechanism 3 or other power set to movable fuel group
Part 2 provides the reset force moved to the second place.
Reactor core structure controls the fuel matter for participating in reacting using the movable fuel component 2 for releasing or being inserted into center
Whether amount is more than critical mass, to realize the start and stop heap of reactor.Movable fuel component 2, which is in, before opening heap releases heap wick-like
State so that the quality of whole reactor is less than critical mass, afterwards by driving mechanism 3 by movable fuel component 2 along guide cylinder 6
Reactor core is slowly pushed into, coordinates the realization of reactor core periphery reflecting layer to open heap again after reaching critical mass.
When be in an emergency need emergency shut-down when, then make driving mechanism 3 power off, mobile will be fired using resetting-mechanism 4
Material component 2 quickly pulls out reactor core along centre pilot cylinder 6, and reactor quality is less than critical mass and reactor shutdown can be achieved.
The reactor core structure can realize the less reactor control of core diameter, simple with structure type, easily
In processing, the features such as being widely used.
Reactor core structure further includes the reflecting layer for the peripheral border for being arranged on solid fuel component.In some embodiments
In, peripheral reflecting layer includes sliding reflection layer or rotary drum reflecting layer, and sliding reflection layer can axially move, and adjustment and reactor core are just
To reflective surface area；Rotary drum reflecting layer is included in some rotors of reactor core border distribution, the rotor side opposite with reactor core
Equipped with reflector, rotor rotates adjustment reflector and the reflective surface area of reactor core face.
The mode that the reactor is coordinated using the reflecting layer of quality control and reactor core periphery, the distribution of microminiature heap power with
Reactive control aspect will be substantially better than C＆P systems, safe with start and stop heap, the characteristics of being easily achieved simple in structure.
In general, the endoporus shape of guide cylinder 6 is more than the section shape of movable fuel component 2, inserted for movable fuel component 2
Enter, 6 heavy wall end of guide cylinder is outside pressure vessel, and thin-walled end is in pressure vessel.
Further, the side wall of guide cylinder is equipped with effluent hole 61.Using the guide cylinder with effluent hole 61 as movement
The moving track of fuel assembly 2, on the one hand plays position-limiting action, avoids between movable fuel component 2 and fixed fuel component 1
Contact and friction, and dither effect of the movable fuel component 2 under fluid impact improve reactor core security；On the other hand
Effluent hole 61 is provided with guide cylinder side wall, the section of removable fuel assembly 2 and the section of fixed fuel component 1 is there is horizontal stroke
Stream, improves the hot-working hydraulic characteristic of whole reactor core.
In certain embodiments, driving mechanism 3 includes the drive rod that one end is connected with movable fuel component 2, drive rod position
In the one end of movable fuel component 2 away from pilot hole 12.Drive rod moves axially, and drives movable fuel component 2 to be inserted into or deviate from
Guide cylinder 6.In general, one end of drive rod is connected with the top of movable fuel component 2.
Resetting-mechanism 4 includes the resetting spring that the elastic force moved to the second place is provided to movable fuel component 2, in movement
When fuel assembly 2 arrives first position, resetting spring is compressed.In general, resetting-mechanism 4 is arranged on, movable fuel component 2 is remote to lead
To the one end in hole 12, the space that movable fuel component 2 moves is not take up.
During emergency shut-down, using resetting spring, movable fuel component 2 is quickly pulled out into guide cylinder 6, realizes shutdown.It is fixed
The upper and lower ends of fuel assembly 1 are respectively equipped with upper mounted plate 13, bottom plate 14, fixed easy to which reactor core structure is installed
Position.
The heap-type structure that this reactor core structure is related to is equally applicable to tilt, overturn and state of weightlessness under microminiature
Reactor, and there is stronger non-passive safety and reliability.The microminiature reactor of this kind of start and stop pile structure has very strong
Reusing and controllability, can complete repeatedly, repeatedly open heap, shutdown process, improve reactor economy and can
Usability.
The start and stop heap control mode of reactor core structure, comprises the following steps：
Start driving mechanism 3, drive movable fuel component 2 to be moved to first position；
Stop driving mechanism 3, drive movable fuel component 2 to be moved to the second place, the mobile power of movable fuel component 2
It can be provided for exterior power set, or resetting-mechanism 4 provides.
Certainly, in the case that equipment does not power off, movable fuel component 2 can be also driven from driving mechanism 3 to second
Put movement.
When movable fuel component 2 moves insertion guide cylinder 6 to first position, whole reactor core is set to reach critical mass, it
Afterwards using the mutual cooperation in heap in-core neutron source and reactor core periphery reflecting layer, the startup of reactor is realized, resetting spring is stretched.
When needing shutdown, make driving mechanism 3 power off, then the resetting spring rapid desufflation in tension state, drive movement
Fuel assembly 2 ejects guide cylinder 6, reactor core fuel quality is less than critical mass, realizes the scram of reactor.
Advantages of the present invention：
1st, the pile structure form is simple, suitable for the less microminiature reactor of core diameter；
2nd, there is accident conditions, it is necessary to during emergency shut-down, which can utilize resetting-mechanism 4 by movable fuel component 2
It is quick to pull out reactor core, complete scram operation.Wherein resetting-mechanism 4 can be not against gravity work structure, as spring,
Electromagnetism etc., therefore can be used for the microminiature reactor control under the states such as reactor inclination, upset and weightlessness, reliable operation
Property it is high, application field is wide；
3rd, can be excellent in terms of core power distribution is flattened for microresponse heap, the respective outer side edges reactor core periphery reflecting layer
In C＆P systems；
4th, the use of centre pilot cylinder, plays positioning and guiding role to movable fuel component 2, can avoid movable fuel group
With fixed fuel component 1 friction or collision occur for part 2, the gap between two parts fuel are maintained, to ensure the heat between fuel
Work waterpower circulation area；Through hole can be opened up by being oriented to tube wall surface at the same time, beneficial to flowing and mixing of the fluid between two parts fuel, energy
Prevent heap in-core local temperature from transfiniting, improve reactor core security；
5th, due to eliminating C＆P systems, reactor core internal structure design can increase without considering the arrangement of control rod
The diversity and alternative of fuel structure form are added, critical, its security reliability higher are controlled by mass separation.
It is to be appreciated that above-mentioned each technical characteristic can be used in any combination and unrestricted.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly used in
Other related technical areas, are equally included in the patent within the scope of the utility model.
Claims (10)
1. a kind of reactor core structure, it is characterised in that including fixed fuel component（1）, movable fuel component（2）And
Driving mechanism（3）；
The fixed fuel component（1）Including some first fuel rods being arranged side by side（11）, some first fuel rods
（11）Pilot hole is formed after arrangement（12）, the pilot hole（12）It is interior to be equipped with to the movable fuel component（2）It is oriented to
Guide cylinder（6）, the movable fuel component（2）Can be in the guide cylinder（6）Interior axial direction pulls and pushes；
The movable fuel component（2）Including some second fuel rods being arranged side by side（21）, the movable fuel component（2）Can
Vertically between the first position and the second position movably with the guide cylinder（6）Coordinate, the movable fuel component（2）
During the first position, the movable fuel component（2）It is inserted into the guide cylinder（6）, the movable fuel component（2）Described
During the second place, the movable fuel component（2）Deviate from the guide cylinder（6）；
The driving mechanism（3）With the movable fuel component（2）Coordinate, to the movable fuel component（2）There is provided to described
The driving force of first position movement.
2. reactor core structure according to claim 1, it is characterised in that some first fuel rods（11）Arrangement
Middle part afterwards is vacated, and forms the pilot hole（12）.
3. reactor core structure according to claim 1, it is characterised in that the guide cylinder（6）Endoporus shape it is big
In the movable fuel component（2）Section shape.
4. reactor core structure according to claim 3, it is characterised in that the guide cylinder（6）Side wall be equipped with
Effluent hole（61）.
5. reactor core structure according to claim 1, it is characterised in that the driving mechanism（3）Including one end with
The movable fuel component（2）The drive rod of connection, the drive rod are located at the movable fuel component（2）Away from the guiding
Hole（12）One end.
6. reactor core structure according to claim 1, it is characterised in that the reactor core structure further includes multiple
Position mechanism（4）, the resetting-mechanism（4）With the movable fuel component（2）Coordinate, to the movable fuel component（2）There is provided
The reset force moved to the second place.
7. reactor core structure according to claim 6, it is characterised in that the resetting-mechanism（4）Including to described
Movable fuel component（2）The resetting spring of the elastic force moved to the second place is provided.
8. the reactor core structure according to claim 6 or 7, it is characterised in that the resetting-mechanism（4）It is arranged on institute
State movable fuel component（2）Away from the pilot hole（12）One end.
9. reactor core structure according to any one of claims 1 to 7, it is characterised in that the reactor core knot
Structure further includes the reflecting layer for the peripheral border for being arranged on the solid fuel component（5）.
10. reactor core structure according to claim 9, it is characterised in that the reflecting layer（5）Including sliding reflection
Layer or rotary drum reflecting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721213816.8U CN207233398U (en) | 2017-09-19 | 2017-09-19 | Reactor core structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721213816.8U CN207233398U (en) | 2017-09-19 | 2017-09-19 | Reactor core structure |
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| Publication Number | Publication Date |
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| CN207233398U true CN207233398U (en) | 2018-04-13 |
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| CN201721213816.8U Active CN207233398U (en) | 2017-09-19 | 2017-09-19 | Reactor core structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107578825A (en) * | 2017-09-19 | 2018-01-12 | 中广核研究院有限公司 | Reactor core structure and its start and stop heap control mode |
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2017
- 2017-09-19 CN CN201721213816.8U patent/CN207233398U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107578825A (en) * | 2017-09-19 | 2018-01-12 | 中广核研究院有限公司 | Reactor core structure and its start and stop heap control mode |
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