CN101727992B - Sleeve pipe type low-enriched uranium nuclear fuel assembly - Google Patents

Sleeve pipe type low-enriched uranium nuclear fuel assembly Download PDF

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Publication number
CN101727992B
CN101727992B CN2009102163055A CN200910216305A CN101727992B CN 101727992 B CN101727992 B CN 101727992B CN 2009102163055 A CN2009102163055 A CN 2009102163055A CN 200910216305 A CN200910216305 A CN 200910216305A CN 101727992 B CN101727992 B CN 101727992B
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sleeve pipe
nuclear fuel
positioning tooth
tooth piece
multilayer
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CN2009102163055A
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CN101727992A (en
Inventor
张凤林
吕华权
刘彤
焦拥军
田盛
尹春雨
肖忠
李垣明
任启森
庞华
禹文池
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Nuclear Power Institute of China
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Nuclear Power Institute of China
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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

Abstract

The invention discloses a sleeve pipe type low-enriched uranium nuclear fuel assembly which comprises an inner sleeve pipe, an outer sleeve pipe, a multilayer nuclear fuel sleeve pipe between the inner sleeve pipe and the outer sleeve pipe, an upper positioning tooth block, an upper joint, a lower joint and a lower positioning tooth block, wherein the inner sleeve pipe and the outer sleeve pipe are concentric; the upper positioning tooth block is fixedly connected with the upper end of the multilayer nuclear fuel sleeve pipe and arranged at the top of the outer sleeve pipe; the upper joint is fixed at the upper port of the upper positioning tooth block; the lower joint is sleeved on the lower port of the outer sleeve pipe; the lower positioning tooth block is arranged in the outer sleeve pipe and fixedly connected with the lower end of the multilayer nuclear fuel sleeve pipe; and each layer of nuclear fuel sleeve pipe comprises an aluminum alloy inner shell, an aluminum alloy outer shell and a U3Si2-Al nuclear fuel core which is arranged between the inner shell and the outer shell and forms metallurgical bonding with the aluminum alloy shells. The invention adopts a coextrusion process and has integral manufacture and simple process; a nuclear fuel sleeve pipe shell material is made of aluminum alloy and has favorable matching performance with the nuclear fuel core in use; the nuclear fuel core, the inner shell and the outer shell are extruded to form the fuel sleeve pipe of which the outer surface is provided with three ridge ribs, and the core and the shells form the metallurgical bonding, thereby improving the structural strength and the safe reliability.

Description

Sleeve pipe type low-enriched uranium nuclear fuel assembly
Technical field
The invention belongs to a kind of nuclear fuel assembly, be specifically related to a kind of low-enriched uranium nuclear fuel assembly.
Background technology
In order to reduce the enrichment of research and test reactor fuel, the nuclear fuel of present most of experimental study heaps all adopts low-enriched uranium nuclear fuel assembly and has realized low denseization.Plate or the arc template low-enriched uranium nuclear fuel assembly that research reactor is at present adopted is with U 3Si 2-Al is the fuel core body, adopts rolling mill practice, earlier fuel slab is processed as flat board or arc plate, and then is mounted on the side plate, and assembly unit forms square or circular fuel assembly, the manufacturing process complexity of this nuclear fuel assembly; Form because assembly is flat board or arc plate, the bendind rigidity of assembly is bad.
Summary of the invention
The objective of the invention is to: the sleeve pipe type low-enriched uranium nuclear fuel assembly that a kind of corrosion resistance is good, structural strength is high, safe and reliable is provided.
Technical scheme of the present invention is as follows:
A kind of sleeve pipe type low-enriched uranium nuclear fuel assembly adopts U 3Si 2-Al is as the fuel core body of nuclear fuel assembly, it is characterized in that: this nuclear fuel assembly is by concentric inner sleeve, outer tube, place the multilayer nuclear fuel sleeve pipe between inner sleeve and the outer tube, with the top positioning tooth piece that is connected, is loaded on the outer tube top on the multilayer nuclear fuel sleeve pipe, be fixed on the top connection of top positioning tooth piece upper port; Be sleeved on the lower sub on the outer tube lower port, and place the bottom positioning tooth piece that is connected with multilayer nuclear fuel sleeve pipe lower end in the outer tube to form; Each layer nuclear fuel sleeve pipe all is the interior outer envelope by aluminium alloy, be loaded in this between outer envelope with aluminium alloy in outer envelope form the U of metallurgical binding 3Si 2-Al nuclear fuel core body is formed.
Additional technical feature is:
1, described each layer nuclear fuel sleeve pipe is loaded on the U between outer envelope in it 3Si 2-Al nuclear fuel core body is for uranium density is 4.8g/cm 3, 235The U enrichment is 20% U 3Si 2-Al nuclear fuel core body.
2, the outside surface of described each layer nuclear fuel sleeve pipe and inner sleeve has 120 ° three the vertical ridge ribs that plush copper is arranged of being centrosymmetric on lateral cross section.
3, described multilayer nuclear fuel sleeve pipe is six layers of nuclear fuel sleeve pipe with concentric shafts.
4, described top positioning tooth piece, have three and on lateral cross section, be centrosymmetric 120 ° and locate vertical tooth plate of every layer of nuclear fuel sleeve pipe, have the hole that spaced dress is inserted vertical teeth groove of each layer nuclear fuel sleeve pipe and laterally run through the gib screw of this tooth plate teeth groove in this tooth plate lower end;
5, described top positioning tooth piece and the multilayer nuclear fuel sleeve pipe upper end that is loaded on the outer tube top is connected, it is upper end with every layer of nuclear fuel sleeve pipe, in the teeth groove of three vertical tooth plate lower ends of corresponding respectively insertion top positioning tooth piece, by the screw that laterally runs through top positioning tooth piece and multilayer nuclear fuel sleeve pipe are connected, make location, nuclear fuel sleeve pipe top;
6, described bottom positioning tooth piece and multilayer nuclear fuel sleeve pipe lower end are connected, it is lower end with every layer of nuclear fuel sleeve pipe, in the teeth groove on corresponding respectively insertion positioning tooth piece top, bottom, by the dormant screw that laterally runs through bottom positioning tooth piece and multilayer nuclear fuel sleeve pipe are connected, make the location, bottom of nuclear fuel sleeve pipe;
7, the center cavity at described top positioning tooth piece reaches in the inner sleeve upper chamber of docking with it, and orifice plug is housed.
Effect of the present invention is: low-enriched uranium nuclear fuel assembly of the present invention adopts co-extrusion pressure technology, the whole manufacturing, and technology is simple; The cladding materials of nuclear fuel sleeve pipe is an aluminium alloy, has good matching with the nuclear fuel core body in co-extrusion pressure is used; Nuclear fuel core body and interior outer envelope are squeezed into the fuel sleeve pipe that outside surface has three ridge ribs, make between nuclear fuel core body and the involucrum and form metallurgical binding, have the structural strength height, safe and reliable remarkable advantage in the heap.
Description of drawings
Fig. 1 is a sleeve pipe type low-enriched uranium nuclear fuel assembly vertical profile structural representation of the present invention
Fig. 2 is the cross-sectional structural representation of the single nuclear fuel sleeve pipe of the present invention
Fig. 3 is the cross-sectional local enlarged diagram of the single nuclear fuel sleeve pipe of the present invention
Fig. 4 is the cross-sectional structural representation of top of the present invention positioning tooth piece
Fig. 5 is the vertical profile structural representation of top positioning tooth piece xsect from 120 ° of middle mind-set two tooth plates
Mark among the figure: 1. top connection; 2. top positioning tooth piece; 3. orifice plug; 4. screw; 5. outer tube; 6. layer 6 nuclear fuel sleeve pipe; 7. layer 5 nuclear fuel sleeve pipe; 8. the 4th layer of nuclear fuel sleeve pipe; 9. the 3rd layer of nuclear fuel sleeve pipe; 10. second layer nuclear fuel sleeve pipe; 11. ground floor nuclear fuel sleeve pipe; 12. inner sleeve; 13. dormant screw; 14. bottom positioning tooth piece; 15. lower sub; 16. outer envelope; 17. nuclear fuel core body; 18. interior involucrum; 19. the tooth plate on the ridge rib 20. top positioning tooth pieces; 21. the positioning tooth on the tooth plate; 22. the teeth groove on the tooth plate.
Embodiment
As shown in Figure 1, sleeve pipe type low-enriched uranium nuclear fuel assembly of the present invention, by concentric inner sleeve 12, outer tube 5, place 6 layers of nuclear fuel sleeve pipe between inner sleeve 12 and the outer tube 5, with the top positioning tooth piece 2 that is connected, is loaded on outer tube 5 tops on 6 layers of nuclear fuel sleeve pipe, be fixed on the top connection 1 of top positioning tooth piece 2 upper port; Be sleeved on the lower sub 15 in outer tube 5 lower port, and the bottom positioning tooth piece 14 that places outer tube 5 and 6 layers of nuclear fuel sleeve pipe lower end to be connected is formed; Wherein:
Top positioning tooth piece 2, have three and on lateral cross section, be centrosymmetric 120 ° and locate vertical tooth plate 20 of every layer of nuclear fuel sleeve pipe 6-11, have the hole that spaced dress is inserted vertical teeth groove 22 of each layer nuclear fuel sleeve pipe and laterally run through the gib screw 4 of this tooth plate teeth groove in these tooth plate 20 lower ends; Reactor coolant flows to nuclear fuel assembly downwards from top positioning tooth piece 2;
Top positioning tooth piece 2 and 6 layers of nuclear fuel sleeve pipe 6-11 upper end are connected, it is upper end with every layer of nuclear fuel sleeve pipe, in the teeth groove 22 of three vertical tooth plates of corresponding respectively insertion top positioning tooth piece, 20 lower ends, by the screw 4 that laterally runs through, top positioning tooth piece 2 and 6 layers of nuclear fuel sleeve pipe 6-11 are connected, make location, nuclear fuel sleeve pipe top;
Bottom positioning tooth piece 14 and 6 layers of nuclear fuel sleeve pipe 6-11 lower end are connected, it is lower end with every layer of nuclear fuel sleeve pipe, in the teeth groove on corresponding respectively insertion positioning tooth piece 14 tops, bottom, by the dormant screw 13 that laterally runs through, bottom positioning tooth piece 14 and 6 layers of nuclear fuel sleeve pipe 6-11 are connected, and can in outer tube 5, endwisely slip, the location, bottom that makes the nuclear fuel sleeve pipe is with the compensating axial thermal expansion;
Top connection 1 and 2 welding of top positioning tooth piece are used to lift fuel assembly;
Lower sub 15 and outer tube 5 welding are sitting under the reactor core on the Turbogrid plates, support whole fuel assembly;
Each layer nuclear fuel sleeve pipe 6-11 all is interior involucrum 18 and outer envelope 16 by aluminium alloy, be loaded between this two involucrum with aluminium alloy in outer envelope to form metallurgical binding, have uranium density be 4.8g/cm 3, 235The U enrichment is 20% U 3Si 2-Al nuclear fuel core body is formed;
The outside surface of each layer nuclear fuel sleeve pipe 6-11 and inner sleeve 12 has the 120 ° of vertical ridge ribs 19 that three plush coppers are 2mm that are centrosymmetric on lateral cross section, effect is the bendind rigidity that guarantees to have the coolant flow passages gap of 2mm and increase assembly;
Inner sleeve 12 plays a part to form coolant flow channel, and irradiation test spare can be placed in its inside; When not placing irradiation test spare, its inside can be assembled orifice plug 3 and be carried out throttling;
Sleeve pipe type low-enriched uranium nuclear fuel assembly of the present invention, length overall 1510mm, gabarit diameter 64mm, wherein the length of every nuclear fuel sleeve pipe is 1100mm, and the uranium density that is placed in one is 4.8g/cm 3, 235The U enrichment is 20% U 3Si 2The length of-Al nuclear fuel core body is 1000mm.

Claims (8)

1. a sleeve pipe type low-enriched uranium nuclear fuel assembly adopts U 3Si 2-Al is as the fuel core body of nuclear fuel assembly, it is characterized in that: this nuclear fuel assembly is by concentric inner sleeve (12), outer tube (5), place the multilayer nuclear fuel sleeve pipe between inner sleeve (12) and the outer tube (5), with the top positioning tooth piece (2) that is connected, is loaded on outer tube (5) top on the multilayer nuclear fuel sleeve pipe, be fixed on the top connection (1) of top positioning tooth piece (2) upper port, be sleeved on the lower sub (15) on outer tube (5) lower port, and place the bottom positioning tooth piece (14) that is connected with multilayer nuclear fuel sleeve pipe lower end in the outer tube (5) to form; Each layer nuclear fuel sleeve pipe, by the interior outer envelope (18,16) of aluminium alloy, be loaded in this between outer envelope (18,16) with aluminium alloy in outer envelope (18,16) form the U of metallurgical binding 3Si 2-Al nuclear fuel core body is formed.
2. according to the described sleeve pipe type low-enriched uranium nuclear fuel assembly of claim 1, it is characterized in that: described each layer nuclear fuel sleeve pipe is loaded on the U between outer envelope (18,16) in it 3Si 2-Al nuclear fuel core body is for uranium density is 4.8g/cm 3, 235The U enrichment is 20% U 3Si 2-Al nuclear fuel core body.
3. according to the described sleeve pipe type low-enriched uranium nuclear fuel assembly of claim 1, it is characterized in that: the outside surface of described each layer nuclear fuel sleeve pipe and inner sleeve (12) has 120 ° three the vertical ridge ribs (19) that plush copper is arranged of being centrosymmetric on lateral cross section.
4. according to the described sleeve pipe type low-enriched uranium nuclear fuel assembly of claim 1, it is characterized in that: described multilayer nuclear fuel sleeve pipe is six layers of nuclear fuel sleeve pipe (6,7,8,9,10,11) with concentric shafts.
5. according to the described sleeve pipe type low-enriched uranium nuclear fuel assembly of claim 1, it is characterized in that: described top positioning tooth piece (2), have three on lateral cross section, be centrosymmetric 120 °, vertical tooth plates (20) of the every layer of nuclear fuel sleeve pipe in location, have the hole that spaced dress is inserted vertical teeth groove (22) of each layer nuclear fuel sleeve pipe and laterally run through the gib screw (4) of this tooth plate teeth groove in this vertical tooth plate lower end.
6. according to the described sleeve pipe type low-enriched uranium nuclear fuel assembly of claim 1, it is characterized in that: the described top positioning tooth piece (2) that is loaded on outer tube (5) top is connected with multilayer nuclear fuel sleeve pipe upper end, it is upper end with every layer of nuclear fuel sleeve pipe, respectively in the teeth groove (22) of three vertical tooth plates (20) lower end of corresponding insertion top positioning tooth piece (2), by the screw (4) that laterally runs through top positioning tooth piece (2) and multilayer nuclear fuel sleeve pipe are connected, make location, nuclear fuel sleeve pipe top.
7. according to the described sleeve pipe type low-enriched uranium nuclear fuel assembly of claim 1, it is characterized in that: described bottom positioning tooth piece (14) is connected with multilayer nuclear fuel sleeve pipe lower end, it is lower end with every layer of nuclear fuel sleeve pipe, in the teeth groove on corresponding respectively insertion bottom positioning tooth piece (14) top, by the dormant screw (13) that laterally runs through bottom positioning tooth piece (14) and multilayer nuclear fuel sleeve pipe are connected, make the location, bottom of nuclear fuel sleeve pipe.
8. according to the described sleeve pipe type low-enriched uranium nuclear fuel assembly of claim 1, it is characterized in that: the center cavity at described top positioning tooth piece (2) reaches in inner sleeve (12) upper chamber of docking with it, and orifice plug (3) is housed.
CN2009102163055A 2009-11-23 2009-11-23 Sleeve pipe type low-enriched uranium nuclear fuel assembly Active CN101727992B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103310859B (en) * 2013-05-20 2015-11-25 中国核动力研究设计院 fission neutron converter
CN104694974B (en) * 2015-02-13 2017-07-07 中国科学院高能物理研究所 U-Al alloy and its fused salt electrolysis preparation method thereof
CN110160948B (en) * 2019-06-12 2021-06-22 中国核动力研究设计院 Simulator for temperature of first wall structure material of fusion reactor and irradiation environment of neutron field
CN114121307A (en) * 2021-11-23 2022-03-01 中国核动力研究设计院 Composite cladding tube with internal buffer layer and fuel rod formed by composite cladding tube
CN115050488A (en) * 2022-06-24 2022-09-13 中国核动力研究设计院 Fuel pipe for improving thermal performance, fuel sleeve structure and fuel assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0533073B1 (en) * 1991-09-16 1996-03-27 Siemens Power Corporation Structural elements for a nuclear reactor fuel assembly
US5832050A (en) * 1996-04-16 1998-11-03 Compagnie Europeene Du Zirconium Cezus Zirconium-based alloy, manufacturing process, and use in a nuclear reactor
CN1700359A (en) * 2005-03-18 2005-11-23 张育曼 Supercritical water nuclear reactor utilizing sleeve fuel assembly
CN101090006A (en) * 2006-06-16 2007-12-19 中国核动力研究设计院 Fin type nuclear fuel assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0533073B1 (en) * 1991-09-16 1996-03-27 Siemens Power Corporation Structural elements for a nuclear reactor fuel assembly
US5832050A (en) * 1996-04-16 1998-11-03 Compagnie Europeene Du Zirconium Cezus Zirconium-based alloy, manufacturing process, and use in a nuclear reactor
CN1700359A (en) * 2005-03-18 2005-11-23 张育曼 Supercritical water nuclear reactor utilizing sleeve fuel assembly
CN101090006A (en) * 2006-06-16 2007-12-19 中国核动力研究设计院 Fin type nuclear fuel assembly

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