CN114188045A - Plate fuel assembly and reactor core - Google Patents

Plate fuel assembly and reactor core Download PDF

Info

Publication number
CN114188045A
CN114188045A CN202111255834.3A CN202111255834A CN114188045A CN 114188045 A CN114188045 A CN 114188045A CN 202111255834 A CN202111255834 A CN 202111255834A CN 114188045 A CN114188045 A CN 114188045A
Authority
CN
China
Prior art keywords
fuel
alloy
plate
metal cylinder
fuel assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111255834.3A
Other languages
Chinese (zh)
Inventor
杨江
石秀安
苏耿华
郭子豪
邹尧磊
王广
王超正
李贤�
周桐
张颖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China General Nuclear Power Corp
China Nuclear Power Technology Research Institute Co Ltd
CGN Power Co Ltd
Original Assignee
China General Nuclear Power Corp
China Nuclear Power Technology Research Institute Co Ltd
CGN Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China General Nuclear Power Corp, China Nuclear Power Technology Research Institute Co Ltd, CGN Power Co Ltd filed Critical China General Nuclear Power Corp
Priority to CN202111255834.3A priority Critical patent/CN114188045A/en
Priority to PCT/CN2021/138441 priority patent/WO2023070883A1/en
Publication of CN114188045A publication Critical patent/CN114188045A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
    • G21C3/36—Assemblies of plate-shaped fuel elements or coaxial tubes
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C5/00—Moderator or core structure; Selection of materials for use as moderator
    • G21C5/02—Details
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The invention discloses a plate type fuel assembly and a reactor core, wherein the plate type fuel assembly comprises a metal cylinder and a plurality of groups of fuel structures arranged in the metal cylinder; the multiple groups of fuel structures are sequentially stacked in the metal cylinder and respectively extend along the length direction of the metal cylinder; each set of said fuel structures comprising a fuel layer, a cooling layer overlying at least one side of said fuel layer; the cooling layer is provided with a plurality of coolant channels which are arranged at intervals, and the coolant channels penetrate through two opposite end faces of the cooling layer and are respectively communicated with two open ends of the metal cylinder. The plate type fuel assembly is used for forming a reactor core, is formed by superposing the fuel layer and the cooling layer in the metal cylinder body, has high structural strength, increases the heat transfer area by arranging the plurality of coolant channels of the cooling layer, improves the ratio of the heat transfer area to the volume, can improve the heat transfer coefficient and the heat transfer density of the reactor core, and is suitable for constructing small reactors and high-temperature reactors.

Description

Plate fuel assembly and reactor core
Technical Field
The invention relates to the technical field of nuclear fuel, in particular to a plate type fuel assembly and a reactor core.
Background
The conventional fuel assembly is basically formed by assembling fuel rods, guide tubes, spacer grids, upper and lower nozzle plates, etc.
The prior art discloses two different core fuel assembly forms, distinguished from conventional fuel assemblies. The first method is that UC with 12 percent enrichment degree is embedded into bubble graphite and pressed into a long strip block element with a hexagonal cross section, and all surfaces are sealed by SiC; the second type uses only UC in 12% enrichment, the shape, size and sealing surface being identical to those of the first type. The reactor core reflecting layer material only contains natural uranium, and the surfaces of all fuel assemblies are stuck with SiC layers with the thickness of 50 mu m for retaining radioactive products. The core formed by the fuel assembly does not contain any metal material, and the heat conducting performance is limited.
Another prior art discloses a fuel assembly in which the fuel is in the form of coated particles, the cross section of the fuel assembly is hexagonal, the matrix of the fuel assembly is SiC, wherein the fuel particles are dispersed and coated, and a plurality of cooling channels are provided in the matrix. With the fuel assembly described above, the coolant heat transfer area per unit volume is low and the heat transfer capability is weak. In order to enhance the heat transfer capacity, more cooling flow channels need to be arranged, however, too many cooling flow channels are arranged on the base body, so that the base body is in a honeycomb-coal shape, the base body is easy to loosen, and the structural strength of the fuel assembly is greatly reduced.
Disclosure of Invention
The invention aims to provide a plate type fuel assembly with high structural strength and heat conducting performance and a reactor core with the plate type fuel assembly.
The technical scheme adopted by the invention for solving the technical problems is as follows: providing a plate type fuel assembly, which comprises a metal cylinder body with two open ends and a plurality of groups of fuel structures arranged in the metal cylinder body; the multiple groups of fuel structures are sequentially stacked in the metal cylinder and respectively extend along the length direction of the metal cylinder;
each set of said fuel structures comprising a fuel layer, a cooling layer overlying at least one side of said fuel layer; the cooling layer is provided with a plurality of coolant channels which are arranged at intervals, and the coolant channels penetrate through two opposite end faces of the cooling layer and are respectively communicated with two open ends of the metal cylinder.
Preferably, the fuel layer comprises an alloy plate extending along the length direction of the metal cylinder and a plurality of fuel columns which are embedded in the alloy plate at intervals and extend along the length direction of the alloy plate.
Preferably, the fuel column comprises a graphite column, coated fuel particles dispersed within the graphite column.
Preferably, the Alloy plate is Alloy 800H, Alloy HX, Alloy 230 or Alloy 617.
Preferably, the fuel layer includes an alloy plate extending along a length direction of the metal cylinder, and coated fuel particles dispersed in the alloy plate.
Preferably, the Alloy plate is Alloy 800H, Alloy HX, Alloy 230 or Alloy 617.
Preferably, the coolant channel is formed by chemical etching.
Preferably, the coolant channel has a diameter, width or depth of 0.5mm to 3 mm.
Preferably, the cooling layer is made of a high temperature resistant alloy sheet material.
Preferably, the Alloy sheet material is Alloy 800H, Alloy HX, Alloy 230 or Alloy 617.
Preferably, the cooling layer and the fuel layer are connected by vacuum diffusion welding.
Preferably, each set of said fuel structures comprises two of said cooling layers; the two cooling layers are respectively superposed on two opposite sides of the fuel layer.
The invention provides another plate type fuel assembly, which comprises a metal cylinder body with two open ends and a plurality of groups of fuel structures arranged in the metal cylinder body; the multiple groups of fuel structures are sequentially stacked in the metal cylinder and respectively extend along the length direction of the metal cylinder;
each set of said fuel structures comprising a fuel bed, a cooling bed disposed on at least one side of said fuel bed; the cooling layer comprises a plurality of cooling agent channels which are arranged at intervals, and the cooling agent channels extend along the length direction of the metal cylinder and are communicated with two open ends of the metal cylinder.
Preferably, the fuel layer comprises a metal substrate extending along the length direction of the metal cylinder, and at least one heat-conducting alloy body embedded in the metal substrate.
Preferably, the thermally conductive alloy body comprises a uranium molybdenum alloy.
Preferably, the coolant channel is formed by chemical etching.
Preferably, the coolant channel has a diameter, width or depth of 0.5mm to 3 mm.
Preferably, the cooling layer is provided on at least one of opposite surfaces of the metal substrate.
Preferably, the cooling layer further comprises an alloy plate stacked on at least one side of the metal substrate; the coolant passage is provided on the alloy plate.
Preferably, the alloy plate is joined to the metal substrate by vacuum diffusion welding.
The invention also provides a reactor core comprising a plate fuel assembly as described in any one of the above.
The plate type fuel assembly is used for forming a reactor core, is formed by superposing a fuel layer and a cooling layer in a metal cylinder body, and has high structural strength; through the setting of a plurality of coolant passageways of cooling layer, increase heat transfer area, and then improve the ratio of heat transfer area and volume, can improve reactor core heat transfer coefficient and heat transfer density, do benefit to the miniaturized design of reactor core, be applicable to and found small-size reactor core, high temperature reactor etc..
The plate type fuel assembly has the characteristics of modular manufacture, high integration level, large heat exchange area, high heat exchange efficiency and the like.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic cross-sectional view of a plate fuel assembly according to a first embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a plate fuel assembly according to a first embodiment of the present invention in a longitudinal direction
FIG. 3 is a schematic cross-sectional view of a plate fuel assembly according to a second embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a plate fuel assembly according to a third embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, a plate fuel assembly according to a first embodiment of the present invention includes a metal cylinder 10 and a plurality of sets of fuel structures disposed in the metal cylinder 10.
The metal cylinder 10 has a cylinder structure with two open ends, and the two open ends form open ends respectively. The outer circumference of the metal cylinder 10 may be polygonal, circular, or the like.
In the metal cylinder 10, a plurality of groups of fuel structures are sequentially stacked along the width direction of the metal cylinder 10, so that the metal cylinder 10 is packaged at the periphery of the stacked plurality of groups of fuel structures; the stacking of the multiple groups of fuel structures makes the fuel structures in heat-conducting connection. Each set of fuel structures extends along the length of the metal cylinder 10 such that the length of the fuel structures corresponds to the length of the metal cylinder 10. The length of the fuel structure may also be less than the length of the metal cylinder 10, such that the two ends of the fuel structure are located inside the two open ends of the metal cylinder 10.
Each set of fuel structures includes a fuel bed 11, a cooling bed 12 overlying at least one side of the fuel bed 11. The cooling layer 12 and the fuel layer 11 are in heat conduction connection. The cooling layer 12 is provided with a plurality of coolant channels 121 arranged at intervals, and the coolant channels 121 extend along the length direction of the metal cylinder 10, penetrate through two opposite end faces of the cooling layer 12, and are respectively communicated with two open ends of the metal cylinder 10. The coolant enters the coolant passage 121 from one open end of the metal cylinder 10, flows along the coolant passage 121 and flows out from the other open end of the metal cylinder 10 as indicated by arrows in fig. 2, thereby taking away heat from the fuel layer 11.
The coolant is a medium with weak chemical effect, high heat transfer system and low flow resistance, such as supercritical CO2Helium, and the like.
In this embodiment, the fuel layer 11 includes an alloy plate 111 and a plurality of fuel pillars 110 that are spaced apart from each other and embedded in the alloy plate 111. The alloy plate 111 extends in the longitudinal direction of the metal cylinder 10, and the fuel column 110 extends in the longitudinal direction of the alloy plate 111 inside the alloy plate 111.
The Alloy plate 111 is made of high-temperature-resistant Alloy plate materials, and can be selected from Alloy 800H, Alloy HX, Alloy 230 or Alloy 617 and the like.
Corresponding to the assembly of the fuel column 110, a channel is preset in the alloy plate 111, the fuel column 110 is placed in the channel, the channel is filled and sealed by the fuel column 110, an air gap is preferably not left between the fuel column 110 and the inner wall of the channel, and the thermal resistance caused by the air gap is reduced. In addition, through use and wear, the fuel column 110 in the fuel bed 11 can be removed and replaced with a new fuel column 110; the alloy plate 111 can be reused.
The fuel column 110 further includes a graphite column 112, coated fuel particles 113 dispersed within the graphite column 112. The graphite has excellent neutron moderation characteristics, is an excellent material used as a reactor core moderator, and can be set with the cross section diameter of the graphite column 112 according to the requirement of neutron physical design; graphite also has a very high heat transfer coefficient, and thus has very good heat transfer properties as a matrix of the fuel column 110, and can transfer heat from the coated fuel particles 113.
Coating the fuel particles 113 with nuclear fuel (e.g., UO)2、PuO2、ThO2Or mixed oxide fuel) as a core. Coating a layer of low-density pyrolytic carbon and a layer of compact pyrolytic carbon outside the core; alternatively, the core is overcoated with a layer of low density pyrolytic carbon, two layers of high density pyrolytic carbon, and a layer of silicon carbide (modified overcoated fuel particles, also TRISO overcoated fuel particles).
In this embodiment, the fuel layer 11 is structurally configured to form three layers of seals for the nuclear fuel, and to coat the fuel particles 113, the graphite pillars 112, and the alloy plates 111, so as to have a good radioactive containment effect.
In a preferred embodiment, the graphite columns 112 are formed as cylinders.
The main body of the cooling layer 12 is made of high temperature resistant Alloy plate material, which is determined by comprehensively considering the temperature and pressure of the reactor, the physical influence of the reactor neutrons and the corrosion effect of the coolant, and can be, but not limited to, Alloy 800H, Alloy HX, Alloy 230 or Alloy 617.
The cooling layer 12 is preferably made of the same material as the alloy plate 111 of the fuel layer 11 so that the cooling layer 12 and the fuel layer 11 can be joined by vacuum diffusion welding.
The fuel structure formed by combining the cooling layer 12 and the fuel layer 11 through superposition has high overall structural strength, and the heat transfer area of the fuel assembly is increased through the arrangement of more coolant channels 121 on the cooling layer 12, so that the ratio of the heat transfer area to the volume of the fuel assembly can be improved.
Further, the size of the coolant channel 121, such as a micro flow channel, can be selected to greatly increase the heat transfer area, so as to further increase the ratio of the heat transfer area to the volume, which is beneficial to improving the heat transfer coefficient. The cross-section of the coolant channel 121 may be, but is not limited to, semicircular, circular, polygonal, etc. Also, the cross-sections of the plurality of coolant passages 121 may be the same shape or different in one cooling layer 12. For a semicircular or circular coolant channel 121, a cross-sectional diameter of 0.5mm to 3mm is preferred; for the polygonal coolant channel 121, a width or depth of 0.5mm to 3mm is preferable.
To better obtain the micro flow channels, the coolant channels 121 on the cooling layer 12 may be formed by chemical etching.
Further, in the present embodiment, as shown in fig. 1 and 2, each group of fuel structures includes two cooling layers 12, and the two cooling layers 12 are respectively stacked on opposite sides of the fuel layer 11. A cooling layer 12 on the side of the fuel layer 11, on which coolant passages 121 are provided on the surface of the cooling layer 12 facing away from the fuel layer 11; and a cooling layer 12 on the other side of the fuel layer 11, and a coolant passage 121 formed therein is provided on a surface of the cooling layer 12 facing the fuel layer 11.
In two groups of fuel structures which are stacked adjacently, the two groups of fuel structures are respectively connected with the cooling layer 12 on one side.
As shown in fig. 2, the plate fuel assembly according to the second embodiment of the present invention includes a metal cylinder 20, and a plurality of sets of fuel structures disposed in the metal cylinder 20.
The metal cylinder 20 has a cylinder structure with two open ends, and the two open ends form open ends respectively. The outer circumference of the metal cylinder 20 may be polygonal, circular, or the like.
In the metal cylinder 20, a plurality of groups of fuel structures are stacked in sequence along the width direction of the metal cylinder 20, so that the metal cylinder 20 is packaged at the periphery of the stacked plurality of groups of fuel structures. Each set of fuel structures extends along the length of the metal cylinder 20 such that the length of the fuel structures is comparable to the length of the metal cylinder 20. The length of the fuel structure may also be less than the length of the metal cylinder 20 so that the two ends of the fuel structure are located inside the two open ends of the metal cylinder 20.
Each set of fuel structures includes a fuel bed 21, and a cooling bed 22 overlying at least one side of the fuel bed 21. The cooling layer 22 is provided with a plurality of coolant channels 221 arranged at intervals, and the coolant channels 221 extend along the length direction of the metal cylinder 10, penetrate through two opposite end faces of the cooling layer 22, and are respectively communicated with two open ends of the metal cylinder 20. The coolant enters the coolant channel 221 from one open end of the metal cylinder 20, flows along the coolant channel 221 and flows out from the other open end of the metal cylinder 20, thereby taking away the heat of the fuel bed 21.
In the present embodiment, the fuel layer 21 includes an alloy plate 211 and coated fuel particles 212 dispersed in the alloy plate 211. The alloy plate 211 extends along the longitudinal direction of the metal cylinder 20. The dispersion density of the coated fuel particles 212 in the alloy plate 211 can be flexibly set according to actual needs.
The Alloy plate 211 is made of high temperature resistant Alloy plate material, and may be selected from Alloy 800H, Alloy HX, Alloy 230, or Alloy 617, etc.
Coating the fuel particles 212 with nuclear fuel (e.g., UO)2、PuO2、ThO2Or mixed oxide fuel) as a core. Coating a layer of low-density pyrolytic carbon and a layer of compact pyrolytic carbon outside the core; alternatively, the core is coated with one layer of low density pyrolytic carbon, two layers of high density pyrolytic carbon, and one layer of silicon carbide (modified coated fuel particles, also TRISO coated fuel particles).
Compared to the first embodiment, in this embodiment, the coated fuel particles 212 are directly dispersed in the alloy plate 211, and the arrangement of the graphite columns is reduced, so that the thermal resistance to heat transfer from the fuel to the coolant can be further reduced.
The main body of the cooling layer 22 is made of high temperature resistant Alloy plate material, which is determined by comprehensively considering the temperature and pressure of the reactor, the physical influence of the reactor neutrons and the corrosion effect of the coolant, and can be, but not limited to, Alloy 800H, Alloy HX, Alloy 230 or Alloy 617.
The cooling layer 22 is preferably made of the same material as the alloy plate 211 of the fuel layer 21 so that the cooling layer 22 and the fuel layer 21 can be joined by vacuum diffusion welding.
The fuel structure formed by combining the cooling layer 22 and the fuel layer 21 through superposition has high overall structural strength, and the cooling layer 22 is provided with a plurality of coolant channels 221, so that the heat transfer area of the fuel assembly is increased, and the ratio of the heat transfer area to the volume of the fuel assembly can be further improved.
Further, by selecting the size of the coolant channel 221, such as a micro flow channel, the heat transfer area can be greatly increased, so that the ratio of the heat transfer area to the volume is further increased, and the heat transfer coefficient is favorably improved. The cross-section of the coolant channel 221 may be, but is not limited to, semicircular, circular, polygonal, etc. Also, the cross-sections of the plurality of coolant passages 221 may be the same shape or different in one cooling layer 22. For a semicircular or circular coolant channel 221, a cross-sectional diameter of 0.5mm to 3mm is preferred; for the polygonal coolant channel 221, a width or depth of 0.5mm to 3mm is preferable.
To obtain the micro flow channels, the coolant channels 221 on the cooling layer 22 can be formed by chemical etching.
Further, in the present embodiment, as shown in fig. 3, each of the fuel structures includes two cooling layers 22, and the two cooling layers 22 are respectively stacked on opposite sides of the fuel layer 21. A cooling layer 22 on the side of the fuel layer 21, on which a coolant channel 221 is provided on the surface of the cooling layer 22 facing away from the fuel layer 21; and a cooling layer 22 on the other side of the fuel layer 21, wherein a coolant channel 221 is arranged on the surface of the cooling layer 22, which faces the fuel layer 21.
In two groups of fuel structures which are stacked next to one another, the two groups of fuel structures are connected together by a cooling layer 22 on one side.
As shown in fig. 4, the plate fuel assembly according to the third embodiment of the present invention includes a metal cylinder 30, and a plurality of sets of fuel structures disposed in the metal cylinder 30.
The metal cylinder 30 has a cylinder structure with two open ends, and the two open ends form open ends respectively. The outer circumference of the metal cylinder 30 may be polygonal, circular, or the like.
In the metal cylinder 30, a plurality of groups of fuel structures are sequentially stacked along the width direction of the metal cylinder 30, so that the metal cylinder 30 is packaged at the periphery of the stacked plurality of groups of fuel structures. Each set of fuel structures extends along the length of the metal cylinder 30 such that the length of the fuel structures is comparable to the length of the metal cylinder 30. The length of the fuel structure may also be less than the length of the metal cylinder 30 such that the two ends of the fuel structure are located inside the respective open ends of the metal cylinder 30.
Each set of fuel structures includes a fuel bed 31, and a cooling bed 32 disposed on at least one side of the fuel bed 31. The cooling layer 32 is provided with a plurality of coolant channels 321 arranged at intervals, and the coolant channels 321 extend along the length direction of the metal cylinder 30, penetrate through two opposite end faces of the cooling layer 32, and are respectively communicated with two open ends of the metal cylinder 30. The coolant enters the coolant passage 321 from one open end of the metal cylinder 30, flows along the coolant passage 321, and flows out from the other open end of the metal cylinder 30, thereby taking away heat of the fuel bed 31.
In this embodiment, the fuel layer 31 includes a metal substrate 311, and at least one heat conductive alloy body 312 embedded in the metal substrate 311.
The metal base plate 311 extends along the longitudinal direction of the metal cylinder 30. The metal substrate 311 is made of a high temperature resistant Alloy plate, and may be Alloy 800H, Alloy HX, Alloy 230, or Alloy 617, or the like. The thermal conductive alloy body 312 extends in the longitudinal direction of the metal substrate 311, and preferably has an overall length smaller than that of the metal substrate 311 so as not to be exposed to the outside of the metal substrate 311.
The main body of the thermal conductive alloy body 312 is preferably made of an alloy material with high temperature resistance and good thermal conductivity, such as uranium-molybdenum alloy. The uranium molybdenum alloy is an alloy body made of uranium and molybdenum, and has good heat-conducting property; relative to coated fuel particles, it has the following advantages: 1) the uranium molybdenum alloy has higher fuel proportion; 2) the uranium molybdenum alloy has high temperature resistance; 3) the uranium molybdenum alloy has the containing function to the radioactive nuclide.
The uranium molybdenum alloy is placed in the cladding to form an integral thermally conductive alloy body 312. The thermal conductive alloy body 312 may be a rectangular plate structure or may be a rod shape. The plurality of thermal conductive alloy bodies 312 are arranged in an array within the metal matrix 311.
Further, in the present embodiment, as shown in fig. 4, each group of fuel structures includes a fuel layer 31, and a cooling layer 32 disposed on one side of the fuel layer 31.
In two sets of fuel structures stacked one above the other, the lower fuel structure meets the upper fuel structure on the side having the cooling layer 32.
In one embodiment, the cooling layer 32 may be integrally formed on the fuel layer 31, that is, a plurality of coolant passages 321 of the cooling layer 32 are provided on at least one of opposite surfaces of the metal base plate 311, as in the structure shown in fig. 4. The thermal conductive alloy body 312 is spaced within the metal base plate 311 by an appropriate distance from the coolant channel 321. The coolant passage 321 may be formed in a cross-sectional shape, size, arrangement, and the like as described above with reference to the first or second embodiment.
In another embodiment, the cooling layer 32 further includes an alloy plate stacked on at least one side of the metal substrate 311; the alloy plate is connected to the metal substrate 311 by vacuum diffusion welding. The coolant passage 321 is provided on the alloy plate. The coolant passage 321 may be formed in a cross-sectional shape, size, arrangement, and the like as described above with reference to the first or second embodiment.
Each group of fuel structures of the plate type fuel assembly can be manufactured in a modularization mode respectively, and in each group of fuel structures, the fuel layer and the cooling layer can be manufactured in a modularization mode respectively, so that production is facilitated.
The plate type fuel assembly is used for forming a reactor core. In the reactor core, the number of the plate type fuel assemblies can be set according to actual requirements, and the plate type fuel assemblies can be stacked in parallel; each plate type fuel assembly is independent, has no mass transfer directly with each other and can transfer heat.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (21)

1. A plate type fuel assembly is characterized by comprising a metal cylinder body with two open ends and a plurality of groups of fuel structures arranged in the metal cylinder body; the multiple groups of fuel structures are sequentially stacked in the metal cylinder and respectively extend along the length direction of the metal cylinder;
each set of said fuel structures comprising a fuel layer, a cooling layer overlying at least one side of said fuel layer; the cooling layer is provided with a plurality of coolant channels which are arranged at intervals, and the coolant channels penetrate through two opposite end faces of the cooling layer and are respectively communicated with two open ends of the metal cylinder.
2. The plate fuel assembly of claim 1, wherein the fuel layer includes an alloy plate extending along a length of the metal cylinder, and a plurality of fuel pillars embedded in the alloy plate at intervals and extending along the length of the alloy plate.
3. The plate fuel assembly of claim 2, wherein the fuel column includes a graphite column, coated fuel particles dispersed within the graphite column.
4. The plate fuel assembly of claim 2, wherein the Alloy plate is Alloy 800H, Alloy HX, Alloy 230, or Alloy 617.
5. The plate fuel assembly of claim 1, wherein the fuel layer comprises an alloy plate extending along a length of the metal cylinder, and coated fuel particles dispersed within the alloy plate.
6. The plate fuel assembly of claim 5, wherein the Alloy plate is Alloy 800H, Alloy HX, Alloy 230, or Alloy 617.
7. The plate fuel assembly according to claim 1, wherein the coolant channels are formed by chemical etching.
8. The plate fuel assembly of claim 1, wherein the coolant channel has a diameter, width, or depth of 0.5mm to 3 mm.
9. The plate fuel assembly of claim 1, wherein the cooling layer is made of a high temperature resistant alloy plate material.
10. The plate fuel assembly of claim 9, wherein the Alloy sheet material is Alloy 800H, Alloy HX, Alloy 230, or Alloy 617.
11. A plate fuel assembly according to any one of claims 1-10, wherein the cooling layer and the fuel layer are joined by vacuum diffusion welding.
12. A plate fuel assembly according to any one of claims 1-10, wherein each set of said fuel structures comprises two of said cooling layers; the two cooling layers are respectively superposed on two opposite sides of the fuel layer.
13. A plate type fuel assembly is characterized by comprising a metal cylinder body with two open ends and a plurality of groups of fuel structures arranged in the metal cylinder body; the multiple groups of fuel structures are sequentially stacked in the metal cylinder and respectively extend along the length direction of the metal cylinder;
each set of said fuel structures comprising a fuel bed, a cooling bed disposed on at least one side of said fuel bed; the cooling layer comprises a plurality of cooling agent channels which are arranged at intervals, and the cooling agent channels extend along the length direction of the metal cylinder and are communicated with two open ends of the metal cylinder.
14. The plate fuel assembly of claim 13, wherein the fuel layer includes a metal base plate extending along a length of the metal cylinder, at least one thermally conductive alloy body embedded within the metal base plate.
15. The plate fuel assembly of claim 14, wherein the thermally conductive alloy body comprises a uranium molybdenum alloy.
16. The plate fuel assembly according to claim 13, wherein the coolant channels are formed by chemical etching.
17. The plate fuel assembly of claim 13, wherein the coolant channels have a diameter, width, or depth of 0.5mm to 3 mm.
18. A plate fuel assembly according to any one of claims 13-17, wherein the cooling layer is provided on at least one of the opposite surfaces of the metal substrate.
19. The plate fuel assembly according to any of claims 13-17, wherein the cooling layer further comprises an alloy plate stacked on at least one side of the metal substrate; the coolant passage is provided on the alloy plate.
20. The plate fuel assembly of claim 19, wherein the alloy plate is joined to the metal substrate by vacuum diffusion welding.
21. A reactor core comprising a plate fuel assembly according to any of claims 1-12 or a plate fuel assembly according to any of claims 13-20.
CN202111255834.3A 2021-10-27 2021-10-27 Plate fuel assembly and reactor core Pending CN114188045A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202111255834.3A CN114188045A (en) 2021-10-27 2021-10-27 Plate fuel assembly and reactor core
PCT/CN2021/138441 WO2023070883A1 (en) 2021-10-27 2021-12-15 Plate-type fuel assembly and reactor core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111255834.3A CN114188045A (en) 2021-10-27 2021-10-27 Plate fuel assembly and reactor core

Publications (1)

Publication Number Publication Date
CN114188045A true CN114188045A (en) 2022-03-15

Family

ID=80540472

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111255834.3A Pending CN114188045A (en) 2021-10-27 2021-10-27 Plate fuel assembly and reactor core

Country Status (2)

Country Link
CN (1) CN114188045A (en)
WO (1) WO2023070883A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3312852B2 (en) * 1996-09-26 2002-08-12 松下電器産業株式会社 Battery power supply
WO2011143172A1 (en) * 2010-05-11 2011-11-17 Thorium Power, Inc. Fuel assembly with metal fuel alloy kernel and method of manufacturing thereof
US10170207B2 (en) * 2013-05-10 2019-01-01 Thorium Power, Inc. Fuel assembly
KR102392920B1 (en) * 2015-06-02 2022-05-02 현대두산인프라코어(주) Cooling module of an energy storage unit
CN206148144U (en) * 2016-10-20 2017-05-03 华北电力大学 Lead base fast reactor quadrangle fuel assembly and fast neutron reactor who is used for thereof
JP7094080B2 (en) * 2017-05-26 2022-07-01 昭和電工株式会社 Cylindrical battery cooling heat exchanger

Also Published As

Publication number Publication date
WO2023070883A1 (en) 2023-05-04

Similar Documents

Publication Publication Date Title
CN110634580B (en) Heat pipe type deep sea application nuclear reactor system
US3855061A (en) Nuclear reactor fuel plate
US4526741A (en) Fuel assembly for the production of tritium in light water reactors
CN114188045A (en) Plate fuel assembly and reactor core
US20060210011A1 (en) High temperature gas-cooled fast reactor
US4818478A (en) BWR fuel assembly mini-bundle having interior fuel rods of reduced diameter
US3873420A (en) Nuclear fuel element assemblies
JP4953543B2 (en) Fuel elements and nuclear reactors using this type of fuel element
Sarangi et al. Analysis of compact heat exchanger performance
US6665366B2 (en) Monobloc fuel element and boiling water and fast spectrum nuclear reactor using such elements
JP5607876B2 (en) Design of fuel rods using internal spacer elements and methods of using them
US3069343A (en) Moderator block construction for nuclear reactors
US3520776A (en) Assembly of fuel elements for nuclear reactors
US4311559A (en) High temperature gas cooled nuclear reactors
CN116403737B (en) Modularized high-safety heat pipe reactor core structure
CN112242203B (en) Component grid arrangement form for loading FCM fuel
CN114446497B (en) Ultra-high flux reactor core based on square fuel assembly
WO2023070888A1 (en) Fuel module and application thereof
CN116721783A (en) Nuclear reactor fuel unit and assembly
JP2023543144A (en) Heat exchanger
RU2066485C1 (en) Fuel element of nuclear-fusion rocket (options)
CN116598026A (en) High-temperature fuel element of solid reactor core
WO2017187812A1 (en) Control rod
CN117766161A (en) Water cooling reactor fuel rod
Baumeister et al. Selection of the Piqua OMR Fuel Element

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination