CN109461509A - Inertial base dispersion fuel pellet and preparation method thereof - Google Patents
Inertial base dispersion fuel pellet and preparation method thereof Download PDFInfo
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- CN109461509A CN109461509A CN201811152057.8A CN201811152057A CN109461509A CN 109461509 A CN109461509 A CN 109461509A CN 201811152057 A CN201811152057 A CN 201811152057A CN 109461509 A CN109461509 A CN 109461509A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
- G21C21/02—Manufacture of fuel elements or breeder elements contained in non-active casings
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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
- G21C3/42—Selection of substances for use as reactor fuel
- G21C3/58—Solid reactor fuel Pellets made of fissile material
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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
The invention discloses a kind of inertial base dispersion fuel pellet and preparation method thereof, preparation method includes: S1, prefabricated no fuel region: SiC mixed-powder being pressed into cylinder and disk respectively and carries out pressureless sintering；S2, prefabricated fuel region: the TRISO particle with SiC clad is pressed into cylindrical body；S3, cylindrical body is packed into cylinder, places disk respectively in the opposite end of cylinder, inertial base dispersion fuel pellet is made in discharge plasma sintering；Cylindrical at inertial base dispersion fuel pellet fuel region, cylinder and disk formed inertial base dispersion fuel pellet without fuel region.Preparation method of the invention, prefabricated no fuel region, the density domination of no fuel region and the pressed density in fuel region are approached, reduce after sintering fuel region density and the density variation without fuel region in pellet, improve fuel region TRISO particle circumference structure, expand fuel region, improves the TRISO volume content of pellet entirety, further increase the comprehensive performance of inertia base fuel.
Description
Technical field
The present invention relates to nuclear fuel technical field more particularly to a kind of inertial base dispersion fuel pellet and its preparation sides
Method.
Background technique
Nuclear fuel energy density is high, CO2Equal noxious gas emissions are few, are that solution fossil resources are in short supply and environmental pollution is serious
Important means.Nuclear energy power generation is clean energy resource, nuclear energy it is with the obvious advantage, with the continuous increase of nuclear power energy ratio, nuclear energy
The more aobvious protrusion in the status of power generation.However, nuclear energy is the energy generated using the fission of the heavy metal elements such as uranium, fission, which will form, to be had
Certain radioactive fission product.Therefore, carrying out radiation protection and preventing radioactive product leakage is the key that Nuclear Safety,
It is the premise for developing nuclear energy.A lot of nuclear activity leakage events once occurred on the road of mankind's peaceful utilization of atomic energy, especially
Fukushima, Japan Nuclear Power Accident in 2011 promotes tradition UO2The accident fault-tolerant ability of-Zr alloy system fuel assembly is closed as people
The focus of note.
UO2Fusing point is high, void swelling is small, but thermal conductivity is low, and it is poor to contain ability for fission gas under deep burnup.Lower thermal conductivity
UO2 pellet make UO2- Zr fuel system forms biggish temperature gradient, the UO of fuel rod in the process of running2In pellet
Heart temperature reaches 1500 DEG C or more.The core temperature of pellet is high, and fission gas releases that rate is big, and high temperature gradient causes pellet to produce
Heat stress reduces the safety of fuel element.In addition, pellet core temperature is higher under loss of-coolant accident (LOCA) working condition, heat transfer
Energy to fuel rod clad is more, and fission gas burst size is bigger, increases the risk of fuel rod clad breakage, or even draws
Send out core meltdown.Therefore, advanced nuclear fuel is developed, studies high heat conductance, the fuel ball of low fission gas release rate is to mention
The key of high nuclear reactor fuel element accident fault-tolerant ability.
IMDP is to use for reference high temperature gas cooled reactor fuel sphere technology, using TRISO microballoon as nuclear fuel carrier, more by TRISO microballoon
It dissipates and is distributed in SiC matrix, be the important research direction of accident fault tolerant fuel pellet.In IMDP pellet, the SiC base of high heat conductance
Body coats TRISO microballoon, protects the integrality of TRISO microballoon, while efficiently conducting heat.Moreover, TRISO particle and IMDP
Special construction design guarantees that pellet inhibits the release of fission gas under deep burnup.The SiC matrix fusing point of IMDP fuel ball
High, thermal conductivity height, TRISO microballoon fission gas release rate is low, these advantages improve the accident fault-tolerant ability of fuel element.
IMDP pellet is TRISO microballoon Dispersed precipitate in the SiC matrix of powder, and U.S.'s Oak Ridge National Laboratory uses
The method of hot pressed sintering carries out hot pressed sintering after mixing TRISO particle with SiC powder, this technique is more mature, and compared to
Pure UO2 pellet thermal conductivity improves, but the method has some disadvantages: that (1) compacting green compact process is difficult, especially outer layer
Without fuel region, Chang Wufa combines closely with fuel region；(2) sintering temperature is high, is unfavorable for the promotion of pellet comprehensive performance.
Summary of the invention
The technical problem to be solved in the present invention is that providing a kind of inertial base disperse for improving fuel pellet comprehensive performance
The preparation method of fuel pellet and inertial base dispersion fuel pellet obtained.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of inertial base dispersion fuel pellet
Preparation method, comprising the following steps:
S1, prefabricated no fuel region: SiC mixed-powder is pressed into cylinder and disk respectively and carries out pressureless sintering；
S2, prefabricated fuel region: the TRISO particle with SiC clad is pressed into cylindrical body；
S3, the cylindrical body is packed into the cylinder, places the circle respectively in the opposite end of the cylinder
Piece, discharge plasma sintering, is made inertial base dispersion fuel pellet；
For the cylindrical at the fuel region of the inertial base dispersion fuel pellet, the cylinder and disk form institute
State inertial base dispersion fuel pellet without fuel region.
Preferably, in step S1, the density of the cylinder and disk after pressureless sintering is respectively 60%-80%.
Preferably, in step S1, when pressureless sintering, SiC powder is covered on the cylinder and disk.
Preferably, the wall thickness of the cylinder be 3-5mm, the disk with a thickness of 2-3mm.
Preferably, the diameter of the disk is equal with the outer diameter of the cylinder；The outer diameter of the cylindrical body and the circle
The internal diameter of cylinder is equal.
Preferably, in step S3, in the discharge plasma sintering, sintering temperature is 1600-2000 DEG C, sintering pressure
For 10-50MPa, soaking time 5-20min.
Preferably, the preparation method is further comprising the steps of:
S0, sintering aid, SiC powder, dispersing agent are mixed, obtains finely dispersed SiC mixed slurry；
Step S1 includes:
S1.1, it takes the SiC mixed slurry to be dried, forms SiC mixed-powder；
S1.2, the SiC mixed-powder is pressed into cylinder and disk respectively；
S1.3, the cylinder and disk are sintered under the conditions of no pressure.
Preferably, step S2 includes:
S2.1, take the SiC mixed slurry and be sprayed on TRISO particle surface, it is dry after on TRISO particle shape
At SiC clad；
S2.2, it the TRISO particle with SiC clad is suppressed under 20-40MPa pressure forms cylindrical body.
The present invention provides the preparation method of another inertial base dispersion fuel pellet, comprising the following steps:
S1, prefabricated no fuel region: SiC mixed-powder is pressed into cylinder and disk respectively and carries out pressureless sintering；
It is S2, the TRISO with SiC clad is particles filled in the cylinder, and by the intracorporal institute of the cylinder
TRISO particle is stated to suppress to form cylindrical body；
S3, the disk is placed respectively in the opposite end of the cylinder, inertia base is made in discharge plasma sintering
Body dispersion fuel pellet；
For the cylindrical at the fuel region of the inertial base dispersion fuel pellet, the cylinder and disk form institute
State inertial base dispersion fuel pellet without fuel region.
Preferably, in step S1, the density of the cylinder and disk after pressureless sintering is respectively 60%-80%；
When pressureless sintering, SiC powder is covered on the cylinder and disk.
Preferably, the wall thickness of the cylinder be 3-5mm, the disk with a thickness of 2-3mm.
Preferably, in step S3, in the discharge plasma sintering, sintering temperature is 1600-2000 DEG C, sintering pressure
For 10-50MPa, soaking time 5-20min.
Preferably, the preparation method is further comprising the steps of:
S0, sintering aid, SiC powder, dispersing agent are mixed, obtains finely dispersed SiC mixed slurry；
Step S1 includes:
S1.1, it takes the SiC mixed slurry to be dried, forms SiC mixed-powder；
S1.2, the SiC mixed-powder is pressed into cylinder and disk respectively；
S1.3, the cylinder and disk are sintered under the conditions of no pressure.
Preferably, step S2 includes:
S2.1, take the SiC mixed slurry and be sprayed on TRISO particle surface, it is dry after on TRISO particle shape
At SiC clad；
It is S2.2, the TRISO with SiC clad is particles filled in the cylinder, it, will under 20-40MPa pressure
The intracorporal TRISO particle of cylinder is suppressed to form cylindrical body.
The present invention also provides a kind of inertial base dispersion fuel pellets, using preparation method system described in any of the above embodiments
?.
Beneficial effects of the present invention: prefabricated no fuel region, the density domination of no fuel region is pressed close with fuel region
Degree is close, reduces after sintering fuel region matrix density and the density variation without fuel region in inertial base dispersion fuel pellet, changes
Kind fuel region TRISO (tristrutural-isotropic, abbreviation TRISO) particle circumference structure, expands combustion as far as possible
Expect area, improves the TRISO volume content of pellet entirety, further increase the comprehensive performance of inertia base fuel.
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 flow chart of the preparation method of first embodiment of the invention；
Fig. 2 is tri- perspective views of CT of pellet made from the preparation method of first embodiment of the invention；
Fig. 3 is the flow chart of the preparation method of second 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.
As shown in Figure 1, the preparation method of the inertial base dispersion fuel pellet of first embodiment of the invention, it may include following
Step:
S0, sintering aid, SiC powder, dispersing agent are mixed by predetermined ratio, obtains finely dispersed SiC mixing
Slurry.
SiC mixed slurry obtained is used for the raw material of subsequent no fuel region and fuel region.
S1, prefabricated no fuel region: SiC mixed-powder is pressed into cylinder and disk respectively and carries out pressureless sintering.
Step S1 is further can include:
S1.1, it takes SiC mixed slurry made from step S0 to be dried, forms SiC mixed-powder.
S1.2, SiC mixed-powder is pressed into cylinder and disk respectively.
One cylinder two disk of corresponding configuration.
S1.3, cylinder and disk are sintered under the conditions of no pressure, make its densification.
In step S1, the wall thickness for suppressing the cylinder of formation can be 3-5mm, and the thickness of disk can be 2-3mm.
The density of cylinder and disk after controlling pressureless sintering is respectively 60%-80%, makes its fuel region with pellet
Density it is close or identical, reduce density variation between the two.
When pressureless sintering, according to the density of desired cylinder and disk, sintering temperature is controlled, so that sintered cylinder
The density of body and disk is in claimed range.
When pressureless sintering, SiC powder is covered on cylinder and disk, mainly reduces or is prevented in SiC mixed-powder
The volatilization of various auxiliary agents.
S2, prefabricated fuel region: the TRISO particle with SiC clad is pressed into cylindrical body.
It is 20-40MPa by the pressure that the TRISO particle with SiC clad is pressed into cylindrical body.In cylindrical body, SiC
Clad layer-forming matrix, TRISO particle disperse in the base；TRISO particle content in cylindrical body accounts for 40-60%.Cylindrical body
Density be 40-50%.
Step S2 is further can include:
S2.1, SiC mixed slurry made from step S0 is taken, and SiC mixed slurry is sprayed on TRISO particle surface, done
SiC clad is formed after dry on TRISO particle.
S2.2, it the TRISO particle with SiC clad is suppressed under 20-40MPa pressure forms cylindrical body.
The size of cylindrical body corresponds to cylinder, for example, the outer diameter of cylindrical body is equal with the internal diameter of cylinder or slightly smaller than justifies
The internal diameter of cylinder, the height of cylindrical body and the height of cylinder are equal.
S3, cylindrical body is packed into cylinder, places disk respectively in the opposite end of cylinder, discharge plasma is burnt
Inertial base dispersion fuel pellet is made in knot.
For cylindrical at the fuel region of inertial base dispersion fuel pellet, cylinder and disk form inertial base disperse combustion
Expect pellet without fuel region.
Wherein, the diameter of disk and the outer diameter of cylinder are equal, and disk is in the end of cylinder by cylinder and its inside
Cylindrical body covering.The outer diameter of cylindrical body and the internal diameter of cylinder are corresponding, are assemblied in cylinder so that cylindrical body can coincide.
Discharge plasma sintering carries out in graphite jig.Discharge plasma be sintered when, sintering temperature be 1600 DEG C-
2000 DEG C, sintering pressure 10MPa-50MPa, soaking time 5min-20min.After the completion of sintering, furnace cooling is obtained lazy
Property matrix dispersion fuel pellet.
Due to no fuel region be it is first pre-formed, when discharge plasma is sintered, TRISO to fuel region of no fuel region
Grain plays an effect of contraction, and the circumference of TRISO distribution of particles is more regular in sintered pellet.As shown in Fig. 2, its
Show tri- perspective views of CT of pellet made from the present embodiment preparation method, as seen from the figure, the circumference of TRISO particle
It is more regular, it is binding to TRISO particle mainly since the density of no fuel region is higher, it is therefore prevented that TRISO particle to
No fuel region is mobile.
As shown in figure 3, the preparation method of the inertial base dispersion fuel pellet of second embodiment of the invention, it may include following
Step:
S0, sintering aid, SiC powder, dispersing agent are mixed by predetermined ratio, obtains finely dispersed SiC mixing
Slurry.
SiC mixed slurry obtained is used for the raw material of subsequent no fuel region and fuel region.
S1, prefabricated no fuel region: SiC mixed-powder is pressed into cylinder and disk respectively and carries out pressureless sintering.
Step S1 is further can include:
S1.1, it takes SiC mixed slurry made from step S0 to be dried, forms SiC mixed-powder.
S1.2, SiC mixed-powder is pressed into cylinder and disk respectively.
One cylinder two disk of corresponding configuration.
S1.3, cylinder and disk are sintered under the conditions of no pressure, make its densification.
In step S1, the wall thickness for suppressing the cylinder of formation can be 3-5mm, and the thickness of disk can be 2-3mm.
The density of cylinder and disk after controlling pressureless sintering is respectively 60%-80%, makes its fuel region with pellet
Density it is close or identical, reduce density variation between the two.
When pressureless sintering, according to the density of desired cylinder and disk, sintering temperature is controlled, so that sintered cylinder
The density of body and disk is in claimed range.
When pressureless sintering, SiC powder is covered on cylinder and disk, mainly reduces or is prevented in SiC mixed-powder
The volatilization of various auxiliary agents.
It is S2, the TRISO with SiC clad is particles filled in cylinder, and there is SiC cladding by cylinder is intracorporal
The TRISO particle of layer is suppressed to form cylindrical body.
It is 20-40MPa by the pressure that the TRISO particle with SiC clad is pressed into cylindrical body.In cylindrical body, SiC
Clad layer-forming matrix, TRISO particle disperse in the base；TRISO particle content in cylindrical body accounts for 40-60%.Cylindrical body
Density be 40-50%.
Step S2 is further can include:
S2.1, SiC mixed slurry made from step S0 is taken, and SiC mixed slurry is sprayed on TRISO particle surface, done
SiC clad is formed after dry on TRISO particle.
It is S2.2, the TRISO with SiC clad is particles filled in cylinder, under 20-40MPa pressure, by cylinder
Intracorporal TRISO particle is suppressed to form cylindrical body.
The size of cylindrical body corresponds to cylinder, for example, the outer diameter of cylindrical body is equal with the internal diameter of cylinder or slightly smaller than justifies
The internal diameter of cylinder, the height of cylindrical body and the height of cylinder are equal.
S3, disk is placed respectively in the opposite end of cylinder, inertial base disperse combustion is made in discharge plasma sintering
Expect pellet.
For cylindrical at the fuel region of inertial base dispersion fuel pellet, cylinder and disk form inertial base disperse combustion
Expect pellet without fuel region.
Wherein, the diameter of disk and the outer diameter of cylinder are equal, and disk is in the end of cylinder by cylinder and its inside
Cylindrical body covering.The outer diameter of cylindrical body and the internal diameter of cylinder are corresponding, are assemblied in cylinder so that cylindrical body can coincide.
Discharge plasma sintering carries out in graphite jig.Discharge plasma be sintered when, sintering temperature be 1600 DEG C-
2000 DEG C, sintering pressure 10MPa-50MPa, soaking time 5min-20min.After the completion of sintering, furnace cooling is obtained lazy
Property matrix dispersion fuel pellet.
The present embodiment is first attached in no fuel region from fuel region material unlike above-mentioned first embodiment and is suppressed again
Molding, tri- basic phases of perspective view of CT of tri- perspective views of CT and pellet made from above-mentioned first embodiment of pellet obtained
Together, the circumference of TRISO particle is more regular.
Inertial base dispersion fuel pellet made from preparation method of the invention, including fuel region and without fuel region, fuel
Area is in no fuel region.
Specifically, fuel region is by cylindrical at no fuel region is formed by cylinder and disk.Cylindrical body is arranged in cylinder
In vivo, cylinder inner space is filled, disk is arranged on the opposite end of cylinder, and whole inertia base is formed after sintering
Body dispersion fuel pellet.
To sum up, in the present invention, no fuel region first passes through sintering and carries out die-filling, sintered no fuel region with fuel region again
Intensity is higher than unsintered green compact, can reduce the risk without fuel region division during die-filling.Prefabricated passes through without fuel region
Sintering front and back density calculates, and can reduce fuel region and the density variation without fuel region in pellet；It is prefabricated without fuel region density compared with
Height plays an effect of contraction to the TRISO particle of fuel region, and sintering process TRISO particle can be prevented mobile to no fuel region,
Be conducive to the size Control of fuel region, the diameter of fuel region can be expanded, improves the TRISO volume content of pellet.In addition, in pellet
The mechanical performance of pellet can be improved in raising without fuel region density.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (15)
1. a kind of preparation method of inertial base dispersion fuel pellet, which comprises the following steps:
S1, prefabricated no fuel region: SiC mixed-powder is pressed into cylinder and disk respectively and carries out pressureless sintering；
S2, prefabricated fuel region: the TRISO particle with SiC clad is pressed into cylindrical body；
S3, the cylindrical body is packed into the cylinder, places the disk respectively in the opposite end of the cylinder, puts
Electro-plasma sintering, is made inertial base dispersion fuel pellet；
At the fuel region of the inertial base dispersion fuel pellet, the cylinder and disk form described lazy the cylindrical
Property matrix dispersion fuel pellet without fuel region.
2. the preparation method of inertial base dispersion fuel pellet according to claim 1, which is characterized in that in step S1,
The density of the cylinder and disk after pressureless sintering is respectively 60%-80%.
3. the preparation method of inertial base dispersion fuel pellet according to claim 1, which is characterized in that in step S1,
When pressureless sintering, SiC powder is covered on the cylinder and disk.
4. the preparation method of inertial base dispersion fuel pellet according to claim 1, which is characterized in that the cylinder
Wall thickness be 3-5mm, the disk with a thickness of 2-3mm.
5. the preparation method of inertial base dispersion fuel pellet according to claim 1, which is characterized in that the disk
Diameter is equal with the outer diameter of the cylinder；The outer diameter of the cylindrical body is equal with the internal diameter of the cylinder.
6. the preparation method of inertial base dispersion fuel pellet according to claim 1, which is characterized in that in step S3,
In the discharge plasma sintering, sintering temperature is 1600-2000 DEG C, sintering pressure 10-50MPa, soaking time 5-
20min。
7. the preparation method of inertial base dispersion fuel pellet according to claim 1-6, which is characterized in that institute
It is further comprising the steps of to state preparation method:
S0, sintering aid, SiC powder, dispersing agent are mixed, obtains finely dispersed SiC mixed slurry；
Step S1 includes:
S1.1, it takes the SiC mixed slurry to be dried, forms SiC mixed-powder；
S1.2, the SiC mixed-powder is pressed into cylinder and disk respectively；
S1.3, the cylinder and disk are sintered under the conditions of no pressure.
8. the preparation method of inertial base dispersion fuel pellet according to claim 7, which is characterized in that step S2 packet
It includes:
S2.1, it takes the SiC mixed slurry and is sprayed on TRISO particle surface, formed on TRISO particle after dry
SiC clad；
S2.2, it the TRISO particle with SiC clad is suppressed under 20-40 MPa pressure forms cylindrical body.
9. a kind of preparation method of inertial base dispersion fuel pellet, which comprises the following steps:
S1, prefabricated no fuel region: SiC mixed-powder is pressed into cylinder and disk respectively and carries out pressureless sintering；
It is S2, the TRISO with SiC clad is particles filled in the cylinder and the cylinder is intracorporal described
TRISO particle is suppressed to form cylindrical body；
S3, the disk is placed respectively in the opposite end of the cylinder, inertial base is made more in discharge plasma sintering
Dissipate fuel pellet；
At the fuel region of the inertial base dispersion fuel pellet, the cylinder and disk form described lazy the cylindrical
Property matrix dispersion fuel pellet without fuel region.
10. the preparation method of inertial base dispersion fuel pellet according to claim 9, which is characterized in that in step S1,
The density of the cylinder and disk after pressureless sintering is respectively 60%-80%；
When pressureless sintering, SiC powder is covered on the cylinder and disk.
11. the preparation method of inertial base dispersion fuel pellet according to claim 9, which is characterized in that the cylinder
The wall thickness of body be 3-5mm, the disk with a thickness of 2-3mm.
12. the preparation method of inertial base dispersion fuel pellet according to claim 9, which is characterized in that in step S3,
In the discharge plasma sintering, sintering temperature is 1600-2000 DEG C, sintering pressure 10-50MPa, soaking time 5-
20min。
13. according to the preparation method of the described in any item inertial base dispersion fuel pellets of claim 9-12, which is characterized in that
The preparation method is further comprising the steps of:
S0, sintering aid, SiC powder, dispersing agent are mixed, obtains finely dispersed SiC mixed slurry；
Step S1 includes:
S1.1, it takes the SiC mixed slurry to be dried, forms SiC mixed-powder；
S1.2, the SiC mixed-powder is pressed into cylinder and disk respectively；
S1.3, the cylinder and disk are sintered under the conditions of no pressure.
14. the preparation method of inertial base dispersion fuel pellet according to claim 13, which is characterized in that step S2 packet
It includes:
S2.1, it takes the SiC mixed slurry and is sprayed on TRISO particle surface, formed on TRISO particle after dry
SiC clad；
It is S2.2, the TRISO with SiC clad is particles filled in the cylinder, under 20-40 MPa pressure, by institute
The intracorporal TRISO particle of cylinder is stated to suppress to form cylindrical body.
15. a kind of inertial base dispersion fuel pellet, which is characterized in that using any one of claim 1-8 or claim 9-
14 described in any item preparation methods are made.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110223789A (en) * | 2019-05-07 | 2019-09-10 | 中广核研究院有限公司 | Manufacturing method, inertia base dispersion fuel pellet and the integrated fuel stick and its manufacturing method of high uranium density coated fuel particles |
| CN111933310A (en) * | 2020-06-09 | 2020-11-13 | 上海核工程研究设计院有限公司 | High-thermal-conductivity uranium dioxide single crystal composite fuel pellet and preparation method thereof |
| CN113012832A (en) * | 2019-12-20 | 2021-06-22 | 中核北方核燃料元件有限公司 | UO2Composite UN-UO2Method for producing fuel pellets |
| WO2022241733A1 (en) * | 2021-05-20 | 2022-11-24 | 中广核研究院有限公司 | High-entropy ceramic inert matrix dispersion fuel pellet and preparation method therefor |
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