CN202694816U - MOX (mixed oxide) fuel assembly structure applied to super-critical water reactor - Google Patents
MOX (mixed oxide) fuel assembly structure applied to super-critical water reactor Download PDFInfo
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- CN202694816U CN202694816U CN2012203385271U CN201220338527U CN202694816U CN 202694816 U CN202694816 U CN 202694816U CN 2012203385271 U CN2012203385271 U CN 2012203385271U CN 201220338527 U CN201220338527 U CN 201220338527U CN 202694816 U CN202694816 U CN 202694816U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model relates to an MOX (mixed oxide) fuel assembly structure applied to a super-critical water reactor, belonging to the field of nuclear energy power generations. A plurality of water rods are arranged in a square housing consisting of a plurality of water boxes, and MOX fuel rods with a diameter of R are arranged in spaces among the water rods; the water rods include large water rods and small water rods, wherein the large water rods have square cross sections of which the length and the width are both 3R, and the small water rods have rectangular cross sections of which the length is 3R and the width is R; the spaces between the water rods and between the water rod and the internal wall of the water box are both R, and are filled with the orderly arranged MOX fuel rods; and fuel agent cooling channels are formed in the space between the MOX fuel rod and the water rod or the space between the MOX fuel rod and the internal wall of the water box. Compared with the original structure in which only the UO2 assembly design is adopted, the MOX assembly structure adopted in the super-critical water-cooled reactor can achieve the same effect, and the uneven power distribution factors of the assembly are improved. The MOX fuel assembly structure applied to the super-critical water reactor has the characteristics of simple structure and minor changes for the design of the original super-critical water reactor assembly, and the safety of the reactor can be enhanced.
Description
Technical field
The utility model belongs to the nuclear energy power generation field, particularly a kind of mox fuel modular construction that is applicable to Supercritical-Pressure Light Water Cooled Reactor.
Background technology
Supercritical-Pressure Light Water Cooled Reactor be international nuclear energy circle generally acknowledge the 4th generation one of nuclear energy heap type.Supercritical-Pressure Light Water Cooled Reactor 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-Pressure Light Water Cooled Reactor heap, and the Supercritical-Pressure Light Water Cooled Reactor modular construction mainly contains the structures such as Quadrilateral assembly and hexagon assembly.In recent years, each nuclear energy advanced country all conducted in-depth research the supercritical water pile component, multiple component design occurred.Improving the axial power of assembly by new modular construction distributes.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 widgets, and adopts the modular construction design proposal of the fuel of different enrichments at four jiaos of places.But because Supercritical-Pressure Light Water Cooled Reactor also is in conceptual phase, main design is not also seen for the component design of mox fuel at present all take UO2 fuel as assembly.
In supercritical water reactor, use mox fuel, both can obtain the higher thermal efficiency, increased simultaneously fuel availability, also reduced the risk of nuclear proliferation.The radioactivity plutonium that detects in the Fukushima, Japan nuclear accident, the mox fuel fusing of may No. 3 using in the unit is leaked and is caused.Therefore, for the security of operation of reactor, need to use the mox fuel modular construction reasonably to design to supercritical water reactor.Impel the real safe and efficient development of nuclear energy.
What use was maximum at present is UO2 fuel, and the design of supercritical water reactor modular construction is also carried out for UO2 fuel.If in particular design, UO2 fuel is directly replaced with mox fuel, may occur changing at physics thermal technology aspect of performance.Under identical thermal parameter distribution occasion, have the larger radially power skewness factor in the mox fuel assembly, can in the large fuel channel of power factor, produce larger fuel central temperature.And the temperature of fusion of mox fuel is less than UO2 fuel.If do not improve studying selected applicable UO2 fuel assembly structure, and directly consider to adopt to have larger security risk by mox fuel.Therefore, must improve the former UO2 of being only applicable to fuel design modular construction, propose to be applicable to the modular construction design of mox fuel, to ensure the safety of supercritical water reactor.
Summary of the invention
The utility model uses mox fuel can cause larger component power uneven factor in the present Supercritical-Pressure Light Water Cooled Reactor modular construction design, and a kind of mox fuel modular construction that is applicable to Supercritical-Pressure Light Water Cooled Reactor is provided.
The technical solution adopted in the utility model is:
Several water boxes form square housing, arrange some water rods in the housing that the water box forms, and placement diameter is the mox fuel rod of R in the gap of water rod; The water rod is divided into flood rod and two kinds of forms of little water rod, and the xsect of flood rod is square, its long and wide 3R that is respectively, and the xsect of little water rod is rectangle, and its length is 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 consists of fuel agent cooling duct.
Described flood rod is arranged by row, the flood rod alternative arrangement of every adjacent two row.
Described water rod is divided into inside and outside two-layer, and material is respectively stainless steel and zirconium dioxide.
The internal layer of described water rod is the little zirconium dioxide of thermal conductivity, and skin is corrosion resistant stainless steel.
Described water rod is divided into three layers, consists of at two-layer stainless steel material therebetween zirconium dioxide material.
The beneficial effects of the utility model are:
In Supercritical-Pressure Light Water Cooled Reactor, adopt the modular construction that is applicable to described mox fuel, with similar UO
2Assembly is compared, although because the mox fuel characteristics have harder power spectrum, and can reduce the power uneven factor, the radially power distribution of lower assembly is arranged.Parameter setting through suitable reaches 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 supercritical water reactor that uses mox fuel.This design is to original UO
2Modular construction is changed less, easily realizes successful.
Description of drawings
Fig. 1 is described mox fuel modular construction vertical view.
Number in the figure:
The 1-MOX fuel rod; 2-fuel coolant channel; 3-water box; 4-water rod.
Embodiment
The utility model provides a kind of mox fuel modular construction that is applicable to Supercritical-Pressure Light Water Cooled Reactor, below in conjunction with the drawings and specific embodiments the utility model is described further.
Design concept of the present utility model 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 water rod has lower power all around.Therefore, by the layout of suitable adjustment water rod with fuel, stop to occur the fuel lattice cell of non-conterminous water rod all around, can improve the power skewness factor of assembly.Pyrotoxin mox fuel rod 1 is by UO
2And PuO
2Mix the uranium plutonium oxide fuel that consists of.
This structure as shown in Figure 1, several water boxes 3 form square housing, arrange some water rods 4 in the housing that water box 3 forms, placement diameter is the mox fuel rod 1 of R in the gap of water rod 4; Water rod 4 is divided into flood rod and two kinds of forms of little water rod, and the xsect of flood rod is square, its long and wide 3R that is respectively, and the xsect of little water rod is rectangle, and its length is 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 space between mox fuel rod 1 and the water rod 4 or mox fuel rod 1 and water box 3 inwalls consists of fuel agent cooling duct 2.The flood rod is arranged by row, the flood rod alternative arrangement of every adjacent two row.
In the present embodiment, comprise 1,27 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 cooling medium that temperature is higher is bottom-up by fuel coolant channel 2, takes the heat that mox fuel rod 1 spreads out of out of.
Claims (5)
1. mox fuel modular construction that is applicable to Supercritical-Pressure Light Water Cooled Reactor, it is characterized in that, several water boxes (3) form square housing, arrange some water rods (4) in the housing that water box (3) forms, and placement diameter is the mox fuel rod (1) of R in the gap of water rod (4); Water rod (4) is divided into two kinds of forms of the excellent and little water rod of flood, and the xsect of flood rod is square, its long and wide 3R that is respectively, and the xsect of little water rod is 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 consist of fuel agent cooling duct (2).
2. a kind of mox fuel modular construction that is applicable to Supercritical-Pressure Light Water Cooled Reactor according to claim 1 is characterized in that, described flood rod is arranged by row, the flood rod alternative arrangement of every adjacent two row.
3. a kind of mox fuel modular construction that is applicable to Supercritical-Pressure Light Water Cooled Reactor according to claim 1 is characterized in that, described water rod (4) is divided into inside and outside two-layer, and material is respectively stainless steel and zirconium dioxide.
4. a kind of mox fuel modular construction that is applicable to Supercritical-Pressure Light Water Cooled Reactor according to claim 3 is characterized in that, the internal layer of described 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 Supercritical-Pressure Light Water Cooled Reactor according to claim 1 is characterized in that, described water rod (4) is divided into three layers, consists of at two-layer stainless steel material therebetween zirconium dioxide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203385271U CN202694816U (en) | 2012-07-12 | 2012-07-12 | MOX (mixed oxide) fuel assembly structure applied to super-critical water reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203385271U CN202694816U (en) | 2012-07-12 | 2012-07-12 | MOX (mixed oxide) fuel assembly structure applied to super-critical water reactor |
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| Publication Number | Publication Date |
|---|---|
| CN202694816U true CN202694816U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203385271U Expired - Fee Related CN202694816U (en) | 2012-07-12 | 2012-07-12 | MOX (mixed oxide) fuel assembly structure applied to super-critical water reactor |
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| CN (1) | CN202694816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768863A (en) * | 2012-07-12 | 2012-11-07 | 华北电力大学 | MOX (Mixed Oxide) fuel assembly structure suitable for supercritical water reactor |
-
2012
- 2012-07-12 CN CN2012203385271U patent/CN202694816U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768863A (en) * | 2012-07-12 | 2012-11-07 | 华北电力大学 | MOX (Mixed Oxide) fuel assembly structure suitable for supercritical water reactor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20130712 |