CN109935371B - Double-sided cooling annular fuel rod with wire winding - Google Patents
Double-sided cooling annular fuel rod with wire winding Download PDFInfo
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- CN109935371B CN109935371B CN201711369493.6A CN201711369493A CN109935371B CN 109935371 B CN109935371 B CN 109935371B CN 201711369493 A CN201711369493 A CN 201711369493A CN 109935371 B CN109935371 B CN 109935371B
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- 239000000446 fuel Substances 0.000 title claims abstract description 209
- 238000004804 winding Methods 0.000 title claims abstract description 64
- 238000001816 cooling Methods 0.000 title claims abstract description 29
- 238000005253 cladding Methods 0.000 claims abstract description 75
- 239000008188 pellet Substances 0.000 claims abstract description 34
- 239000002826 coolant Substances 0.000 claims abstract description 15
- 238000012546 transfer Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims description 14
- 238000009730 filament winding Methods 0.000 claims description 13
- 229910001093 Zr alloy Inorganic materials 0.000 claims description 5
- 239000001307 helium Substances 0.000 claims description 5
- 229910052734 helium Inorganic materials 0.000 claims description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 239000003758 nuclear fuel Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010618 wire wrap Methods 0.000 description 1
Classifications
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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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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention provides a double-sided cooling annular fuel rod with wire winding, which comprises an upper end plug, a lower end plug, an inner cladding, an outer cladding and annular fuel pellets; wherein, the cavity formed by nesting the inner cladding and the outer cladding is used for accommodating the annular fuel pellet, the upper end plug is connected above the inner cladding and the outer cladding, and the lower end plug is connected below the inner cladding and the outer cladding; winding 1 or more wires on the outer surface of the outer shell, namely spirally winding the wires on the outer surface of the outer shell; the two ends of the winding wire are respectively fixed on the upper end plug and the lower end plug. The double-sided cooling annular fuel rod with the winding wires, which is wound outside the annular fuel rod, has the effect of obviously increasing the transverse flow of the coolant, enhances the heat transfer effect from the fuel rod to the coolant, takes away more heat of a heat channel through the turbulent flow of the coolant, reduces the temperature of the fuel rod, improves DNBR and enhances the safety of the fuel rod.
Description
Technical Field
The invention relates to the technical field of nuclear power, in particular to a fuel rod, and further relates to a double-sided cooling annular fuel rod with wire winding.
Background
During the operation of a nuclear power plant reactor, the performance of nuclear fuel is an important factor affecting the safety and economy of the reactor. Therefore, the research of the fuel element is put in a very prominent position all the time internationally, and various performances of the nuclear fuel element are continuously improved by optimizing the design of the fuel element, adopting advanced structural materials, improving the manufacturing process of the element and the like, so that the nuclear power is promoted to develop towards safer and more economical directions.
The nuclear fuel is generally designed in a solid cylinder shape and consists of upper and lower end plugs, pellets, compression springs and cladding, and coolant flows through the cladding to cool the fuel rods.
In the existing pressurized water reactor fuel assembly design, the fuel rods are generally clamped and suspended by a positioning grid, and the lower tube seat supports the whole fuel assembly through a control rod guide tube. This design places high demands on the spacer grid. At the end of the reactor operation, the clamping force of the springs clamping the fuel rods is drastically reduced due to the irradiation, the fuel rods generally fall on the lower tube seat, and the fuel rods may move up and down due to the flow of the coolant, which may cause a risk of breakage of the fuel rods.
The benefit of annular fuel is that at very high linear densities, the temperature of the fuel centre is still very low, less stored energy is present in the fuel and less fissile gas is released compared to conventional solid cylindrical fuel. Fuel performance may be expected to be better under normal operating and transient conditions.
In the prior experimental fast reactor fuel element, the outer surface of the fuel rod cladding tube adopts a stainless steel wire winding structure, and the fuel rod cladding tube is isolated and positioned so that coolant Na can flow through a spiral cavity formed by wire winding among the fuel rod cladding tubes, and a cooling liquid circulation loop is formed to take away heat released by the reactor. No document report on the structure of the outer wire winding of the annular fuel rod is found. Meanwhile, the annular fuel rod is obviously different from the fast reactor fuel rod from structure to material, and the filament winding mode of the fast reactor fuel rod cannot be directly used outside the annular fuel rod.
Disclosure of Invention
The invention aims to provide a double-sided cooling annular fuel rod with wire winding, which can reduce the temperature of the fuel rod, improve DNBR, enhance the safety of the fuel rod, has simple structure and easy processing,
The technical scheme for realizing the purpose of the invention comprises the following steps: a double-sided cooled annular fuel rod with wire winding, the annular fuel rod comprising an upper end plug, a lower end plug, an inner cladding, an outer cladding, annular fuel pellets; the inner cladding and the outer cladding are nested to form a cavity for accommodating the annular fuel pellet, and the upper end plug is connected above the inner cladding and the outer cladding, and the lower end plug is connected below the inner cladding and the outer cladding; winding 1 or more wires on the outer surface of the outer shell, namely spirally winding the wires on the outer surface of the outer shell; the two ends of the winding wire are respectively fixed on the upper end plug and the lower end plug.
The double-sided cooling annular fuel rod with the wire winding is characterized in that one end of the wire winding is fixed on the lower end plug in a welding mode; the other end is fixed on the upper end plug by welding.
A double-sided cooled annular fuel rod with wire winding as described above, wherein the lower end plug of the annular fuel rod is secured to the lower tube socket by a tubular securing member.
The lower end plug of the annular fuel rod is fixed on the lower tube seat through a tubular fixing piece, the upper end of the tubular fixing piece is spirally connected to the outer surface of the lower end plug, and the fixing mode that the lower end of the tubular fixing piece is fixed on the lower tube seat comprises spiral connection, buckle connection, C-shaped ring or pin connection.
The double-sided cooling annular fuel rod with the wire winding comprises a tubular fixing piece, wherein 2 to 6 side openings are formed in the position, avoiding welding, of the upper end plug or the lower end plug of the tubular fixing piece, so that flow blockage is prevented, and coolant is blocked from the lower end to the upper end.
A double-sided cooling annular fuel rod with wire winding is provided, wherein the upper end plug can be provided with 1 air charging hole, and helium is injected into a cavity formed by nesting an inner cladding and an outer cladding and used for accommodating a fuel pellet through the air charging hole.
A double-sided cooled annular fuel rod with windings as described above, wherein the ratio of the pitch of the windings to the length of the annular fuel rod is 1: (4-8).
The double-sided cooling annular fuel rod with wires is characterized in that 1-3 wires are wound on the outer surface of the outer cladding; the diameter of the winding wire is 1-4 mm.
A double-sided cooled annular fuel rod with wire winding as described above, wherein the wire winding material is a zirconium alloy.
A double-sided cooled annular fuel rod with filament winding as described above, wherein the ratio of annular fuel rod length to inner cladding inner diameter is (400-600): 1, the ratio of the length of the annular fuel rod to the outer diameter of the outer shell is (200-350): 1, a step of;
The double-sided cooling annular fuel rod with wire winding, wherein the clearance between the outer surface of the inner cladding and the inner surface of the annular fuel pellet is 0.02-0.1 mm; the gap between the inner surface of the outer casing and the outer surface of the annular fuel pellet is 0.03-0.15 mm.
A double-sided cooling annular fuel rod with wire winding is provided, and a compression spring is arranged at the upper end of the annular fuel core block.
The double-sided cooling annular fuel rod with the wire winding is characterized in that one end of the compression spring is propped against the annular fuel core block, the other end of the compression spring is propped against the upper end plug, and the annular fuel core block is compressed on the lower end plug under the thrust action of the compression spring.
A double-sided cooled annular fuel rod with filament winding as described above, wherein the annular fuel rod has a heat transfer area to fuel volume ratio of 0.6 to 2.
A double-sided cooled annular fuel rod with wire winding as described above, wherein the annular fuel rod has a maximum average power of 30-50kW/m; the highest temperature of the annular fuel pellets was reduced to 500 ℃.
The annular fuel assembly comprises an upper tube seat, a lower tube seat and an annular fuel rod, wherein the annular fuel rod adopts any double-sided cooling annular fuel rod with wire winding.
An annular fuel assembly as described above comprising a plurality of double-sided cooled annular fuel rods with windings disposed within a shroud or fuel cartridge having an upper end directly connected to an upper stem and a lower end directly connected to a lower stem.
An annular fuel assembly as described above having 12 x 12 to 17 x 17 of said double-sided cooled annular fuel rods with wire windings disposed within a shroud or fuel cartridge, the wire windings being offset between adjacent annular fuel rods.
The invention has the following effects: the double-sided cooling annular fuel rod with the winding wires, which is wound outside the annular fuel rod, has the effect of obviously increasing the transverse flow of the coolant, enhances the heat transfer effect from the fuel rod to the coolant, takes away more heat of a heat channel through the turbulent flow of the coolant, reduces the temperature of the fuel rod, improves DNBR and enhances the safety of the fuel rod. The double-sided cooling annular fuel rod with the wire winding can be cooled on both sides, namely, coolant can flow inside and outside the fuel rod to cool the fuel rod. Compared with the existing pressurized water reactor fuel rod structure, the fuel heat transfer area is increased by 50%, the highest temperature of the fuel core block is reduced by 1000 ℃, the linear power density is increased by 20% -50%, and the flow resistance is reduced by 20%. The double-sided cooling annular fuel rod designed by the invention has certain strength and is easy to process when being connected in a welding mode. The annular fuel rod is fixed on the lower tube seat through the tubular fixing piece, so that the problem that the fuel rod is damaged due to the fact that the clamping force of the spring for clamping the fuel rod is reduced in the operation process and falls on the lower tube seat is avoided, the upward and downward movement of the fuel rod when the coolant flows upwards through the fuel assembly is prevented, and the risk of damage to the fuel rod is avoided. According to the fuel assembly with the wound wires and the double-sided cooling annular fuel rods, as the wound wires are wound outside the outer cladding, no spacer grid is arranged, the fuel rods are radially restrained by the coamings (or fuel boxes) arranged outside the peripheries of the annular fuel rods, and the outer cladding is not easy to damage during the assembly of the fuel rods.
Drawings
FIG. 1 is a schematic view of a double-sided cooled annular fuel rod with filament winding in accordance with the present invention.
FIG. 2 is a cross-sectional view of a double-sided cooled annular fuel rod with wire wrapping in accordance with the present invention.
In the figure: 1. an upper end plug; 2. an inner envelope; 3. an outer envelope; 4. a compression spring; 5. annular fuel pellets; 6. a lower end plug; 7. a tubular fixing member; 8. an air filling hole; 9. and (5) winding wires.
Detailed Description
A double sided cooled annular fuel rod with filament winding in accordance with the present invention is further described below with reference to the drawings and specific examples.
Example 1
As shown in fig. 1 and 2, a double-sided cooled annular fuel rod with wire winding according to the present invention comprises an upper end plug 1, a lower end plug 6, an inner cladding 2, an outer cladding 3, annular fuel pellets 5; wherein, the hollow cavity formed by nesting the inner cladding 2 and the outer cladding 3 is used for accommodating the annular fuel pellet 5, the upper end plug 1 is connected above the inner cladding 2 and the outer cladding 3, and the lower end plug 6 is connected below the inner cladding 2 and the outer cladding 3;
1 wire winding 9 is wound on the outer surface of the outer shell 3, namely the wire winding 9 is spirally wound on the outer surface of the outer shell 3. One end of the wire winding 9 is fixed on the lower end plug 6 in a welding mode; the other end is fixed to the upper end plug 1 by welding.
The tubular fixing piece 7 is provided with 2 to 6 side openings at the position avoiding the welding position or the lower end plug 6, so that the flow blockage is prevented, and the coolant is stopped from flowing from bottom to top.
The ratio of the pitch of the winding wires to the length of the annular fuel rod is 1:4. the wire winding material is zirconium alloy; the wire winding diameter was 2mm.
The ratio of annular fuel rod length to inner cladding inner diameter is 500:1, the ratio of the annular fuel rod length to the outer diameter of the outer envelope is 300:1, a step of; the gap between the outer surface of the inner cladding and the inner surface of the annular fuel pellet is 0.08mm; the gap between the inner surface of the outer casing and the outer surface of the annular fuel pellet is 0.1mm.
The upper end of the annular fuel core block is provided with a compression spring. The upper end plug 1 is provided with 1 air charging hole 8 through which helium is injected into a cavity which is formed by nesting the inner cladding and the outer cladding and is used for containing the fuel pellet.
The ratio of the heat transfer area of the annular fuel rod to the fuel volume is 0.6-2; the highest average power of the annular fuel rod is 30-50kW/m; the highest temperature of the annular fuel pellets 5 was reduced to below 500 ℃.
Example 2
As shown in fig. 1 and 2, a double-sided cooled annular fuel rod with wire winding according to the present invention comprises an upper end plug 1, a lower end plug 6, an inner cladding 2, an outer cladding 3, annular fuel pellets 5; wherein, the hollow cavity formed by nesting the inner cladding 2 and the outer cladding 3 is used for accommodating the annular fuel pellet 5, the upper end plug 1 is connected above the inner cladding 2 and the outer cladding 3, and the lower end plug 6 is connected below the inner cladding 2 and the outer cladding 3;
3 wires 9 are wound on the outer surface of the outer casing 3, namely the wires 9 are spirally wound on the outer surface of the outer casing 3. One end of the wire winding 9 is fixed on the lower end plug 6 in a welding mode; the other end is fixed to the upper end plug 1 by welding.
The lower end plug 6 of the annular fuel rod is fixed to the lower tube seat by a tubular fixing member 7. The upper end of the tubular fixing piece 7 is spirally connected with the outer surface of the lower end plug 6, and the fixing mode that the lower end of the tubular fixing piece 7 is fixed on the lower tube seat comprises spiral connection, buckling connection, C-shaped ring or pin connection.
The tubular fixing piece 7 is provided with 2 to 6 side holes for preventing the flow blockage, and the coolant is in plug flow from bottom to top.
The ratio of the pitch of the winding wires to the length of the annular fuel rod is 1:6. the wire winding material is zirconium alloy; the wire winding diameter was 1mm.
The upper end plug 1 can be provided with 1 air charging hole 8, and helium is injected into a cavity formed by nesting the inner cladding and the outer cladding and used for accommodating the fuel pellet through the air charging hole.
The ratio of annular fuel rod length to inner cladding inner diameter is 400:1, the ratio of the length of the annular fuel rod to the outer diameter of the outer casing is 200:1, a step of; the gap between the outer surface of the inner cladding and the inner surface of the annular fuel pellet is 0.02mm; the gap between the inner surface of the outer casing and the outer surface of the annular fuel pellet is 0.03mm.
The upper end of the annular fuel core block is provided with a compression spring. One end of the compression spring is propped against the annular fuel core block, the other end is propped against the upper end plug, and the annular fuel core block is compressed against the lower end plug under the thrust action of the compression spring.
The ratio of the heat transfer area of the annular fuel rod to the fuel volume is 0.6-2; the highest average power of the annular fuel rod is 30-50kW/m; the highest temperature of the annular fuel pellets 5 was reduced to below 500 ℃.
Example 3
As shown in fig. 1 and 2, a double-sided cooled annular fuel rod with wire winding according to the present invention comprises an upper end plug 1, a lower end plug 6, an inner cladding 2, an outer cladding 3, annular fuel pellets 5; wherein, the hollow cavity formed by nesting the inner cladding 2 and the outer cladding 3 is used for accommodating the annular fuel pellet 5, the upper end plug 1 is connected above the inner cladding 2 and the outer cladding 3, and the lower end plug 6 is connected below the inner cladding 2 and the outer cladding 3;
3 wires 9 are wound on the outer surface of the outer casing 3, namely the wires 9 are spirally wound on the outer surface of the outer casing 3: one end of the wire winding 9 is fixed on the lower end plug 6 in a welding mode; the other end is fixed to the upper end plug 1 by welding.
The ratio of the pitch of the winding wires to the length of the annular fuel rod is 1:8. the wire winding material is zirconium alloy; the wire winding diameter was 4mm.
The ratio of annular fuel rod length to inner cladding inner diameter is 600:1, the ratio of annular fuel rod length to outer diameter of the outer casing is 350:1, a step of; the gap between the outer surface of the inner cladding and the inner surface of the annular fuel pellet is 0.1mm; the gap between the inner surface of the outer casing and the outer surface of the annular fuel pellet is 0.15mm.
The upper end of the annular fuel core block is provided with a compression spring. The upper end plug 1 is provided with 1 air charging hole, and helium is injected into a cavity formed by nesting the inner cladding and the outer cladding and used for accommodating the fuel pellet through the air charging hole.
The ratio of the heat transfer area of the annular fuel rod to the fuel volume is 0.6-2; the highest average power of the annular fuel rod is 30-50kW/m; the highest temperature of the annular fuel pellets 5 was reduced to below 500 ℃.
Example 4
An annular fuel assembly includes an upper tube seat, a lower tube seat, and an annular fuel rod. The annular fuel rod adopts the double-sided cooling annular fuel rod with wires in the embodiment 1, the annular fuel assembly comprises 12 multiplied by 12 double-sided cooling annular fuel rods with wires, the double-sided cooling annular fuel rods with wires are placed in a coaming, the upper end of the coaming is directly connected with an upper tube seat, and the lower end of the coaming is directly connected with a lower tube seat.
The wires are arranged in a staggered way between adjacent annular fuel rods in the coaming.
The double-sided cooling annular fuel rod with the wire winding is fixed on the lower tube seat through a tubular fixing piece 7. The upper end of the tubular fixing piece is spirally connected to the outer surface of the lower end plug 6, the lower end of the tubular fixing piece is fixed to the lower tube seat, and the fixing mode comprises spiral connection, buckling connection, C-shaped ring or pin connection.
Example 5
An annular fuel assembly includes an upper tube seat, a lower tube seat, and an annular fuel rod. The annular fuel rod adopts the double-sided cooling annular fuel rod with wires in the embodiment 2 or the embodiment 3, the annular fuel assembly comprises 17 multiplied by 17 double-sided cooling annular fuel rods with wires, the double-sided cooling annular fuel rods with wires are placed in a fuel box, the upper end of the fuel box is directly connected with an upper pipe seat, and the lower end of the fuel box is directly connected with a lower pipe seat.
The wires are arranged in a staggered way between adjacent annular fuel rods in the fuel box.
Claims (12)
1. A double-sided cooled annular fuel rod with wire winding, comprising an upper end plug (1), a lower end plug (6), an inner cladding (2), an outer cladding (3), and annular fuel pellets (5); the method is characterized in that: the inner cladding (2) and the outer cladding (3) are nested to form a cavity for accommodating the annular fuel pellet (5), the upper end plug (1) is connected above the inner cladding (2) and the outer cladding (3), and the lower end plug (6) is connected below the inner cladding; winding 1 or more wires (9) on the outer surface of the outer shell (3), namely spirally winding the wires (9) on the outer surface of the outer shell (3); the two ends of the winding wire are respectively fixed on the upper end plug (1) and the lower end plug (6);
One end of the wire winding (9) is fixed on the lower end plug (6) in a welding mode; the other end is fixed on the upper end plug (1) in a welding mode;
The lower end plug (6) of the annular fuel rod is fixed on the lower tube seat through a tubular fixing piece (7); the lower end plug of the annular fuel rod is fixed on the lower tube seat through a tubular fixing piece (7), the upper end of the tubular fixing piece (7) is spirally connected to the outer surface of the lower end plug (6), and the fixing mode of the lower end of the tubular fixing piece (7) fixed on the lower tube seat comprises spiral connection, buckle connection, C-shaped ring or pin connection;
the tubular fixing piece (7) is provided with 2 to 6 side openings at the position avoiding the welding position or the lower end plug (6) to prevent the flow blockage, and the coolant is in plug flow from bottom to top.
2. A double-sided cooled annular fuel rod with filament winding as defined in claim 1 wherein: the upper end plug (1) can be provided with 1 inflation hole (8), and helium is flushed into a cavity formed by nesting the inner cladding and the outer cladding and used for accommodating the fuel pellet through the inflation hole.
3. A double-sided cooled annular fuel rod with filament winding as defined in claim 1 wherein: the ratio of the pitch of the winding wires (9) to the length of the annular fuel rod is 1: (4-8).
4. A double-sided cooled annular fuel rod with filament winding as defined in claim 1 wherein: the outer surface of the outer shell (3) is wound with 1-3 wires (9); the diameter of the winding wire is 1-4 mm.
5. A double-sided cooled annular fuel rod with filament winding as defined in claim 1 wherein: the wire winding (9) is made of zirconium alloy.
6. A double-sided cooled annular fuel rod with filament winding as defined in claim 1 wherein: the ratio of the length of the annular fuel rod to the inner diameter of the inner cladding is (400-600): 1, the ratio of the length of the annular fuel rod to the outer diameter of the outer shell is (200-350): 1.
7. A double-sided cooled annular fuel rod with filament winding as defined in claim 1 wherein: the gap between the outer surface of the inner cladding and the inner surface of the annular fuel pellet is 0.02-0.1 mm; the gap between the inner surface of the outer casing and the outer surface of the annular fuel pellet is 0.03-0.15 mm.
8. A double-sided cooled annular fuel rod with filament winding as defined in claim 1 wherein: the ratio of the heat transfer area of the annular fuel rod to the fuel volume is 0.6-2.
9. A double-sided cooled annular fuel rod with filament winding as defined in claim 1 wherein: the highest average power of the annular fuel rod is 30-50kW/m; the highest temperature of the annular fuel pellets (5) is reduced to below 500 ℃.
10. An annular fuel assembly comprising an upper stem, a lower stem, and an annular fuel rod, characterized in that: the annular fuel rod adopts the double-sided cooling annular fuel rod with wire winding as claimed in any one of claims 1 to 9.
11. An annular fuel assembly according to claim 10, wherein: the fuel assembly comprises a plurality of double-sided cooling annular fuel rods with wires, wherein the double-sided cooling annular fuel rods with wires are placed in a coaming or a fuel box, the upper end of the coaming or the fuel box is directly connected with an upper tube seat, and the lower end of the coaming or the fuel box is directly connected with a lower tube seat.
12. An annular fuel assembly according to claim 10, wherein: 12X 12 to 17X 17 double-sided cooling annular fuel rods with wires are placed in the coaming or the fuel box, and wires between adjacent annular fuel rods are arranged in a staggered mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711369493.6A CN109935371B (en) | 2017-12-19 | 2017-12-19 | Double-sided cooling annular fuel rod with wire winding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711369493.6A CN109935371B (en) | 2017-12-19 | 2017-12-19 | Double-sided cooling annular fuel rod with wire winding |
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| CN109935371A CN109935371A (en) | 2019-06-25 |
| CN109935371B true CN109935371B (en) | 2024-07-02 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111477353A (en) * | 2020-05-25 | 2020-07-31 | 中国原子能科学研究院 | Fuel rod with variable pitch winding positioning structure |
| CN112366009B (en) * | 2020-11-16 | 2023-01-10 | 中国原子能科学研究院 | Mixed winding and wire winding positioning fuel assembly of sodium-cooled fast reactor |
| CN112756859B (en) * | 2020-12-30 | 2023-03-21 | 中核北方核燃料元件有限公司 | Method for confirming gap between end plug and inner welding seam of cladding tube |
| CN113643836B (en) * | 2021-08-09 | 2023-08-01 | 中国科学院近代物理研究所 | Visual fuel rod processing method of lead cold fast reactor |
| CN113787286B (en) * | 2021-09-22 | 2023-05-30 | 中国核电工程有限公司 | Automatic positioning mechanism for lower end plug of fuel rod and wire winding welding system |
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