CN102768863A - MOX (Mixed Oxide) fuel assembly structure suitable for supercritical water reactor - Google Patents
MOX (Mixed Oxide) fuel assembly structure suitable for supercritical water reactor Download PDFInfo
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- CN102768863A CN102768863A CN2012102423406A CN201210242340A CN102768863A CN 102768863 A CN102768863 A CN 102768863A CN 2012102423406 A CN2012102423406 A CN 2012102423406A CN 201210242340 A CN201210242340 A CN 201210242340A CN 102768863 A CN102768863 A CN 102768863A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses an MOX (Mixed Oxide) fuel assembly structure suitable for a supercritical water reactor, belonging to the field of nuclear power generation. A plurality of water boxes are formed into a square shell, a plurality of water rods are arranged in the shell formed by the water boxes, an MOX fuel rod with the diameter of R is arranged in a gap between every two adjacent water rods, the water rods include large water rods and small water rods, the cross section of each large water rod is of a square with the length of 3R and the width of 3R, the cross section of each small water rod is of a rectangle with the length of 3R and the width of R, gaps between every two adjacent water rods and between each water rod and each water box are both R and filled by the MOX fuel rods which are tidily arranged, and gaps between the MOX fuel rods and the water rods or between the MOX fuel rods and the inner walls of the water boxes form a fuel agent cooling channel. By using the MOX assembly structure is adopted in the supercritical water reactor, the same effects with the traditional structure in which only a UO2 assembly design is used can be achieved, and the condition of uneven power distribution factors of an assembly can be improved. The MOX fuel assembly structure has the characteristics of simple structure and little improvement on the traditional supercritical water reactor assembly and can be used for improving the safety of the reactor.
Description
Technical field
The invention belongs to the nuclear energy power generation field, particularly a kind of mox fuel modular construction that is applicable to the supercritical water cold dome.
Background technology
The supercritical water cold dome be international nuclear energy circle generally acknowledge the 4th generation one of nuclear energy heap type.The supercritical water cold dome operates under the temperature and pressure above working medium thermal technology critical point.Nuclear fuel generation heat is a very complicated process in the supercritical water cold dome heap, and supercritical water cold dome modular construction mainly contains structures such as Quadrilateral assembly and hexagon assembly.In recent years, each nuclear energy advanced country had all carried out deep research to the supercritical water pile component, multiple component Design occurred.Improve the axial distribute power of assembly through new modular construction.European Union, Japan, Canada, Korea S all design all kinds of modular constructions that are fit to overcritical heap.At home, Shanghai Communications University designs the component Design scheme that is applicable to mixed spectrum; Tsing-Hua University adopts widget, and adopts the modular construction design proposal of the fuel of different enrichments at four jiaos of places.But because the supercritical water cold dome also is in conceptual phase, main design is an assembly with UO2 fuel all, does not also see at present to the component Design of mox fuel.
In overcritical water-water reactor, use mox fuel, both can obtain the higher thermal efficiency, increased fuel availability simultaneously, also reduced the risk of nuclear proliferation.Detected radioactivity plutonium in the Fukushima, Japan nuclear accident, the mox fuel fusing of maybe No. 3 using in the unit is leaked and is caused.Therefore, for the security of operation of reactor, need use the mox fuel modular construction reasonably to design to overcritical water-water reactor.Impel the real safe and efficient development of nuclear energy.
What use was maximum at present is UO2 fuel, and supercritical water pile component structural design is also carried out to UO2 fuel.If in particular design, UO2 fuel is directly replaced with mox fuel, possibly aspect the physics thermal property, occur changing.Under identical thermal parameter distribution occasion, have bigger radially distribute power uneven factor in the mox fuel assembly, can in the big fuel channel of power factor, produce bigger fuel central temperature.And the temperature of fusion of mox fuel is less than UO2 fuel.If do not improve, and directly consider to adopt mox fuel, with having bigger security risk to studying selected suitable UO2 fuel assembly structure.Therefore, must be applicable to that UO2 fuel design modular construction improves, propose to be applicable to the modular construction design of mox fuel, to ensure the safety of overcritical water-water reactor to former.
Summary of the invention
The present invention is directed in the present supercritical water cold dome modular construction design, use mox fuel can cause bigger component power uneven factor, a kind of mox fuel modular construction that is applicable to the supercritical water cold dome is provided.
The technical scheme that the present invention adopts is:
Several water boxes are formed square housing, in the housing that the water box is formed, arrange some water rods, and placement diameter is the mox fuel rod of R in the gap of water rod; The water rod is divided into big flood rod and two kinds of forms of little water rod, and the xsect that big flood is excellent is a square, its long and wide 3R that is respectively, and the xsect of little water rod is a rectangle, and it is long to be 3R, and wide is R; Spacing between water rod and the water rod, between the inwall of water rod and water box is R, by the excellent filling of mox fuel of proper alignment; Space between space between mox fuel rod and the water rod or mox fuel rod and the water box inwall constitutes fuel agent cooling duct.
Said big flood rod is arranged by row, the big flood rod alternative arrangement of every adjacent two row.
Two-layer inside and outside said water rod is divided into, material is respectively stainless steel and zirconium dioxide.
The internal layer of said water rod is the little zirconium dioxide of thermal conductivity, and skin is corrosion resistant stainless steel.
Said water rod is divided into three layers, constitutes at two-layer stainless steel material therebetween zirconium dioxide material.
Beneficial effect of the present invention is:
In the supercritical water cold dome, adopt the modular construction that is applicable to said mox fuel, with similar UO
2Assembly is compared, though because the mox fuel characteristics have harder power spectrum, and can reduce the power uneven factor, radially distribute power of lower assembly is arranged.Through the proper parameters setting, reach and similar UO
2The coolant outlet parameter that component Design is identical, and lower fuel central temperature and fuel can temperature.Can improve the security performance of the overcritical water-water reactor that uses mox fuel.This design is to original UO
2Modular construction is changed less, realizes that easily effect is obvious.
Description of drawings
Fig. 1 is described mox fuel modular construction vertical view.
Label among the figure:
The 1-MOX fuel rod; 2-fuel coolant channel; 3-water box; 4-water rod.
Embodiment
The invention provides a kind of mox fuel modular construction that is applicable to the supercritical water cold dome, the present invention is further specified below in conjunction with accompanying drawing and embodiment.
Design concept of the present invention is, considers the relation of slowing properties, and all border on the river the mutually fuel lattice cell of rod of both sides has higher power, and the fuel lattice cell of non-conterminous all around water rod has lower power.Therefore,, stop to occur the fuel lattice cell of non-conterminous water rod all around, can improve the distribute power uneven factor of assembly through the layout of suitable adjustment water rod with fuel.Pyrotoxin mox fuel rod 1 is by UO
2And PuO
2Mix the uranium plutonium oxide fuel that constitutes.
This structure is as shown in Figure 1, and several water boxes 3 are formed square housing, in the housing that water box 3 is formed, arranges some water rods 4, and placement diameter is the mox fuel rod 1 of R in the gap of water rod 4; Water rod 4 is divided into big flood rod and two kinds of forms of little water rod, and the xsect that big flood is excellent is a square, its long and wide 3R that is respectively, and the xsect of little water rod is a rectangle, and it is long to be 3R, and wide is R; Spacing between water rod and the water rod, between the inwall of water rod and water box 3 is R, by excellent 1 filling of mox fuel of proper alignment; Space between mox fuel rod 1 and the water rod 4 or the space between mox fuel rod 1 and water box 3 inwalls constitute fuel agent cooling duct 2.The big flood rod is arranged by row, the big flood rod alternative arrangement of every adjacent two row.
Two-layer inside and outside water rod 4 is divided into, internal layer is the little zirconium dioxide of thermal conductivity, and skin is corrosion resistant stainless steel; Inside and outside materials at two layers also can be exchanged.Water rod 4 can also adopt three-decker, constitutes at two-layer stainless steel material therebetween zirconium dioxide material.
In the present embodiment, comprise 1,27 big flood rod of 324 mox fuel rods in this modular construction, 18 little water rods and 24 external water boxes.The moderator that temperature is lower flows through water rod 4 and water box 3 from top to bottom, and the bottom-up fuel coolant channel 2 that passes through of cooling medium that temperature is higher is taken the heat that mox fuel rod 1 spreads out of out of.
Claims (5)
1. mox fuel modular construction that is applicable to the supercritical water cold dome; It is characterized in that; Several water boxes (3) are formed square housing, in the housing that water box (3) is formed, arrange some water rods (4), and placement diameter is the mox fuel rod (1) of R in the gap of water rod (4); Water rod (4) is divided into big flood rod and two kinds of forms of little water rod, and the xsect that big flood is excellent is a square, its long and wide 3R that is respectively, and the xsect of little water rod is a rectangle, and it is long to be 3R, and wide is R; Spacing between water rod and the water rod, between the inwall of water rod and water box (3) is R, by mox fuel excellent (1) filling of proper alignment; Space between mox fuel rod (1) and the water rod (4) or the space between mox fuel rod (1) and water box (3) inwall constitute fuel agent cooling duct (2).
2. a kind of mox fuel modular construction that is applicable to the supercritical water cold dome according to claim 1 is characterized in that, said big flood rod is arranged by row, the big flood rod alternative arrangement of every adjacent two row.
3. a kind of mox fuel modular construction that is applicable to the supercritical water cold dome according to claim 1 is characterized in that, two-layer inside and outside said water rod (4) is divided into, material is respectively stainless steel and zirconium dioxide.
4. a kind of mox fuel modular construction that is applicable to the supercritical water cold dome according to claim 3 is characterized in that, the internal layer of said water rod (4) is the little zirconium dioxide of thermal conductivity, and skin is corrosion resistant stainless steel.
5. a kind of mox fuel modular construction that is applicable to the supercritical water cold dome according to claim 1 is characterized in that, said water rod (4) is divided into three layers, constitutes at two-layer stainless steel material therebetween zirconium dioxide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102423406A CN102768863A (en) | 2012-07-12 | 2012-07-12 | MOX (Mixed Oxide) fuel assembly structure suitable for supercritical water reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102423406A CN102768863A (en) | 2012-07-12 | 2012-07-12 | MOX (Mixed Oxide) fuel assembly structure suitable for supercritical water reactor |
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| CN102768863A true CN102768863A (en) | 2012-11-07 |
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| CN2012102423406A Pending CN102768863A (en) | 2012-07-12 | 2012-07-12 | MOX (Mixed Oxide) fuel assembly structure suitable for supercritical water reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855946A (en) * | 2012-09-12 | 2013-01-02 | 华北电力大学 | Water rod used in supercritical water-cooled reactor |
| CN111554413A (en) * | 2020-05-15 | 2020-08-18 | 中国核动力研究设计院 | Fuel assembly for supercritical water-cooled reactor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139615A (en) * | 2005-11-18 | 2007-06-07 | Toshiba Corp | Fuel assembly, and nuclear reactor having core loaded with fuel assembly |
| CN202694816U (en) * | 2012-07-12 | 2013-01-23 | 华北电力大学 | MOX (mixed oxide) fuel assembly structure applied to super-critical water reactor |
-
2012
- 2012-07-12 CN CN2012102423406A patent/CN102768863A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139615A (en) * | 2005-11-18 | 2007-06-07 | Toshiba Corp | Fuel assembly, and nuclear reactor having core loaded with fuel assembly |
| CN202694816U (en) * | 2012-07-12 | 2013-01-23 | 华北电力大学 | MOX (mixed oxide) fuel assembly structure applied to super-critical water reactor |
Non-Patent Citations (5)
| Title |
|---|
| A.YAMAJI: "Improved core design of the high temperature supercritical-pressure light water reactor", 《ANNALS OF NUCLEAR ENERGY 》, 31 December 2005 (2005-12-31), XP027768954 * |
| CANHUI SUN,ET AL: "Improving on Assembly of SCWR Using MOX Fuel", 《ADVANCED MATERIALS RESEARCH》, 7 October 2011 (2011-10-07), pages 1633 - 1636 * |
| CANHUI SUN,ET AL: "Thermal Analysis on Improved Assembly in SCWR Using MOX fuel", 《THE FIFTH CHINA-KOREA WORKSHOP ON NUCLEAR REACTOR THERMAL HYDRAULICS》, 12 October 2011 (2011-10-12) * |
| K. KAMEI,ET AL: "Fuel and core design of super LWR with stainless steel cladding", 《PROCEEDINGS OF ICAPP’05,SEOUL,KOREA》, 19 May 2005 (2005-05-19) * |
| 孙灿辉等: "超临界水冷堆MOX燃料的组件改进研究", 《中国科技论文在线》, 21 April 2011 (2011-04-21) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855946A (en) * | 2012-09-12 | 2013-01-02 | 华北电力大学 | Water rod used in supercritical water-cooled reactor |
| CN102855946B (en) * | 2012-09-12 | 2015-10-21 | 华北电力大学 | A kind of water rod being applicable to Supercritical-Pressure Light Water Cooled Reactor |
| CN111554413A (en) * | 2020-05-15 | 2020-08-18 | 中国核动力研究设计院 | Fuel assembly for supercritical water-cooled reactor |
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Application publication date: 20121107 |