CN103871501A - Flow distributor of nuclear reactor lower chamber - Google Patents
Flow distributor of nuclear reactor lower chamber Download PDFInfo
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- CN103871501A CN103871501A CN201210540512.8A CN201210540512A CN103871501A CN 103871501 A CN103871501 A CN 103871501A CN 201210540512 A CN201210540512 A CN 201210540512A CN 103871501 A CN103871501 A CN 103871501A
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- flow distribution
- web joint
- nuclear reactor
- lower chambers
- distribution device
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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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- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention relates to a flow distributor of a nuclear reactor lower chamber, the flow distributor is arranged in a lower chamber in a lower end socket of a pressure vessel, and comprises a flow distribution plate, a connecting plate and a basic connecting plate, a reactor core lower support plate, the flow distribution plate, the connecting plate and the basic connecting plate are in the same axial line, and are orderly arranged from top to bottom; the flow distributor simplifies the reactor lower chamber structure, improves the stability and reliability, realizes coolant flow distribution of the reactor lower chamber, and overcomes an inhomogeneous flow field in a reactor core entrance region, and the flow distributor is simple in structure, reduces the cost, and improves the economical efficiency.
Description
Technical field
The present invention relates to field of pressurized water reactor nuclear, be specifically related to a kind of reactor lower chambers flow distribution device for pressurized-water reactor nuclear power plant.
Background technology
At present in two generations of operation and two generation modified pressurized water nuclear reactors, reactor core neutron flux measurement detector is drawn from pressure vessel low head, therefore be provided with the parts such as instrumentation thimble and penetration piece at low head place, these instrumentation thimbles, penetration piece can mix to suppress to the coolant flow field of lower chambers the formation of eddy current together with structures such as screen work plate, secondary support columns, the flow that enters reactor core is carried out to uniform distribution simultaneously.But the existence of low head place penetration piece, increased the risk of low head potential failure, and lower chambers structure is very complicated.Third generation pressurized water reactor core measurement instrument is drawn by pressure vessel upper cover, simplify to a great extent reactor lower chambers structure, but will cause reactor core entrance area flow field to produce unevenness, therefore, for meeting the requirement of the cooling medium uniform distribution that enters reactor core, promote reactor overall performance, need to a kind of flow distribution device be set in reactor lower chambers.
Summary of the invention
The technical matters that will solve of the present invention is to provide a kind of reactor that In-core Instrumentation instrument is drawn by pressure vessel upper cover that is applicable to, and can overcome reactor core entrance area efficiency loss, the lower chambers flow distribution device that the satisfied cooling medium uniform distribution that enters reactor core requires.
In order to solve the problems of the technologies described above, technical scheme of the present invention is, a kind of nuclear reactor lower chambers flow distribution device, and it is arranged in the lower chambers in pressure vessel low head, comprising: flow distribution baffle, web joint, basic web joint; Reactor core lower supporting plate, flow distribution baffle, web joint, basic web joint coaxial line, and arrange successively from top to bottom.
Described flow distribution baffle is annular slab, and its external diameter is 1.5R ~ 1.7R, and internal diameter is R ~ 1.3R, and thickness of slab is 0.02 ~ 0.04R;
Wherein, R is described pressure vessel inside radius.
Described flow distribution baffle is provided with several axially penetrating discharge orifices.
The circumferential extension radian of described discharge orifice is 18 °, and its radial width is 0.08R ~ 0.1R.
The vertical range of the lower surface of described flow distribution baffle upper surface and reactor core lower supporting plate is 0.2R ~ 0.4R.
Described web joint is annular slab, is provided with several axially penetrating openings on it.
Described web joint external diameter is 0.9R ~ 1.1R, and thickness of slab is 0.02 ~ 0.04R; The vertical range of the upper surface of described web joint and described reactor core lower supporting plate is 0.43R ~ 0.6R.
Described basic web joint is square plate structure, and its central authorities have square open-work.
The vertical range of the lower surface of the lower surface of described basic web joint and reactor core lower supporting plate is 0.7R ~ 0.9R; The axial distance of the lower surface of described basic web joint and pressure vessel low head inside surface is 0.01R ~ 0.03R.
Beneficial effect of the present invention:
(1) the present invention simplifies reactor lower chambers structure, improves stability and reliability;
(2) distribution of realization response heap lower chambers coolant flow of the present invention, has overcome reactor core entrance area flow field non-uniform phenomenon;
(3) the present invention is simple in structure, has reduced cost, and has improved economy.
Accompanying drawing explanation
Fig. 1 is a kind of nuclear reactor lower chambers of the present invention flow distribution device schematic diagram;
Fig. 2 is flow distribution baffle schematic diagram in a kind of nuclear reactor lower chambers of the present invention flow distribution device;
Fig. 3 is web joint schematic diagram in a kind of nuclear reactor lower chambers of the present invention flow distribution device;
Fig. 4 is basic web joint schematic diagram in a kind of nuclear reactor lower chambers of the present invention flow distribution device;
In figure: 1-reactor core lower support plate; 2-joint pin; 3-flow distribution baffle; 301-discharge orifice; 302-joint pin connecting hole; Bis-support columns of 4-; 5-web joint; 6-energy absorber; 7-basis web joint; 8-pressure vessel; 9-lower chambers; 10-decline chamber; 11-radial supporter 11.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
Nuclear power plant reactor comprises pressure vessel 8, in described pressure vessel 8, be provided with hanging basket assembly, described hanging basket assembly lower end is provided with reactor core lower supporting plate 1, described reactor core lower supporting plate 1 is supported on reactor core radial supporter 11, between described hanging basket assembly outer wall and the inwall of pressure vessel 8, forms a decline chamber 10; In the low head of described pressure vessel 8, be lower chambers 9 in the region of reactor core lower supporting plate 1 bottom; When reactor operation, cooling medium enters pressure vessel 8 through cold leg, and flows into described lower chambers 9 through decline chamber 10; Cooling medium is upward through after the interior mixing of lower chambers 9 that reactor core lower supporting plate 1 enters reactor core and reactor core fuel assembly carries out fluid interchange, finally by the heat pipe section outflow pressure container 8 of pressure vessel 8;
A kind of nuclear reactor lower chambers of the present invention flow distribution device, it is arranged in the lower chambers in pressure vessel 8 low heads, comprising: flow distribution baffle 3, web joint 5, basic web joint 7; Described flow distribution baffle 3, web joint 5 and basic web joint 7 and reactor core lower supporting plate 1 coaxial line;
The inside radius of described pressure vessel low head is 2200mm; Described flow distribution baffle 3 is annular slab, and described annular slab external diameter is 3400mm, and internal diameter is 2682mm; The axial width of this annular slab is 51.6mm; Described annular slab is provided with 8 axial penetrating discharge orifices 301; The circumferential extension radian of each discharge orifice 301 is 18 °, and its radial width is 200mm;
On described annular slab, be also provided with 302,4 joint pin 2 one end of 4 joint pin connecting holes and be fixed by screws on described joint pin connecting hole 302, the other end is fixed by screws in the lower surface of reactor core lower supporting plate 1; The vertical range of the lower surface of described annular slab upper surface and reactor core lower supporting plate 1 is 570mm;
The external diameter of described web joint 5 is 2422mm, and its entirety is discoideus, and center has a center pit, and the plate face between center pit and its outward flange has 4 openings; Described web joint 5 is connected to the lower surface of reactor core lower supporting plate 1 by 12 secondary support columns 4; Described 12 secondary support column 4 one end are fixing by screw and described web joint 5, and the other end is fixed by the lower surface of screw and described reactor core lower supporting plate 1; The vertical range of the upper surface of described web joint 5 and described reactor core lower supporting plate 1 is 1066.8mm; The axial width of described web joint 5 is 51.6mm;
Described basic web joint 7 is square plate structure, and its central authorities have a square open-work; 4 energy absorber one end are fixed on the upper surface of described basic web joint 7, and the other end is fixed on the lower surface of described web joint 5; The vertical range of the lower surface of the lower surface of described basic web joint 7 and described reactor core lower supporting plate 1 is 1682.8mm; The axial distance of the lower surface outward flange of described basic web joint 7 and described pressure vessel low head inside surface is 26.9mm;
A kind of pressurized water nuclear reactor lower chambers flow distribution device of the present invention, has simplified reactor lower chambers structure greatly, has improved structural stability and reliability.Use this flow distribution baffle 3 front and back, lower chambers 9 coolant flux distribution uneven factor calculated values obviously reduce, and have met the requirement of thermal-hydraulic, and the problem of the fine distribution inequality that has solved lower chambers 9 coolant flows, has significantly promoted reactor overall performance.
Claims (9)
1. a nuclear reactor lower chambers flow distribution device, it is arranged in the lower chambers in pressure vessel low head, it is characterized in that: comprising: flow distribution baffle, web joint, basic web joint; Reactor core lower supporting plate, flow distribution baffle, web joint, basic web joint coaxial line, and arrange successively from top to bottom.
2. according to nuclear reactor lower chambers flow distribution device claimed in claim 1, it is characterized in that: described flow distribution baffle is annular slab, its external diameter is 1.5R ~ 1.7R, and internal diameter is R ~ 1.3R, and thickness of slab is 0.02 ~ 0.04R;
Wherein, R is described pressure vessel inside radius.
3. according to nuclear reactor lower chambers flow distribution device claimed in claim 2, it is characterized in that: described flow distribution baffle is provided with several axially penetrating discharge orifices.
4. according to nuclear reactor lower chambers flow distribution device claimed in claim 3, it is characterized in that: the circumferential extension radian of described discharge orifice is 18 °, and its radial width is 0.08R ~ 0.1R.
5. according to nuclear reactor lower chambers flow distribution device claimed in claim 4, it is characterized in that: the vertical range of the lower surface of described flow distribution baffle upper surface and reactor core lower supporting plate is 0.2R ~ 0.4R.
6. according to nuclear reactor lower chambers flow distribution device claimed in claim 2, it is characterized in that: described web joint is annular slab, on it, be provided with several axially penetrating openings.
7. according to nuclear reactor lower chambers flow distribution device claimed in claim 6, it is characterized in that: described web joint external diameter is 0.9R ~ 1.1R, thickness of slab is 0.02 ~ 0.04R; The vertical range of the upper surface of described web joint and described reactor core lower supporting plate is 0.43R ~ 0.6R.
8. according to nuclear reactor lower chambers flow distribution device claimed in claim 2, it is characterized in that: described basic web joint is square plate structure, and its central authorities have square open-work.
9. according to nuclear reactor lower chambers flow distribution device claimed in claim 8, it is characterized in that: the vertical range of the lower surface of the lower surface of described basic web joint and reactor core lower supporting plate is 0.7R ~ 0.9R; The axial distance of the lower surface of described basic web joint and pressure vessel low head inside surface is 0.01R ~ 0.03R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210540512.8A CN103871501B (en) | 2012-12-14 | 2012-12-14 | Flow distributor of nuclear reactor lower chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210540512.8A CN103871501B (en) | 2012-12-14 | 2012-12-14 | Flow distributor of nuclear reactor lower chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103871501A true CN103871501A (en) | 2014-06-18 |
| CN103871501B CN103871501B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210540512.8A Active CN103871501B (en) | 2012-12-14 | 2012-12-14 | Flow distributor of nuclear reactor lower chamber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409114A (en) * | 2014-12-12 | 2015-03-11 | 中国科学院合肥物质科学研究院 | Flow distribution device used for tank-type forced circulation reactor |
| CN105895171A (en) * | 2016-04-28 | 2016-08-24 | 中国核动力研究设计院 | Flow distributing structure for lower cavity of pressurized water reactor |
| CN107146642A (en) * | 2017-06-21 | 2017-09-08 | 四川大学 | Flow distribution device in a kind of heap of nuclear power plant reactor |
| CN107170490A (en) * | 2017-07-14 | 2017-09-15 | 四川大学 | A kind of reactor lower chambers cooling agent is mixed and current equalizer |
| CN111681787A (en) * | 2020-06-23 | 2020-09-18 | 中国科学院上海应用物理研究所 | Lower cavity structure of reactor container and reactor container |
| CN111681786A (en) * | 2020-06-23 | 2020-09-18 | 中国科学院上海应用物理研究所 | Lower cavity structure of reactor container and reactor container |
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| JPS62106888A (en) * | 1985-11-01 | 1987-05-18 | Hitachi Ltd | Apparatus for desalting condensed water |
| EP0352476A2 (en) * | 1988-07-29 | 1990-01-31 | Combustion Engineering, Inc. | Wear-reduction-sleeve for thimbles |
| CN1256498A (en) * | 1998-12-01 | 2000-06-14 | 法玛通公司 | Pressure water nuclear reaction tank with steady cooling water flow device at the bottom of the tank |
| CN102800371A (en) * | 2012-05-04 | 2012-11-28 | 中广核工程有限公司 | Flow distribution structure of reactor of nuclear power station |
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2012
- 2012-12-14 CN CN201210540512.8A patent/CN103871501B/en active Active
Patent Citations (4)
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| JPS62106888A (en) * | 1985-11-01 | 1987-05-18 | Hitachi Ltd | Apparatus for desalting condensed water |
| EP0352476A2 (en) * | 1988-07-29 | 1990-01-31 | Combustion Engineering, Inc. | Wear-reduction-sleeve for thimbles |
| CN1256498A (en) * | 1998-12-01 | 2000-06-14 | 法玛通公司 | Pressure water nuclear reaction tank with steady cooling water flow device at the bottom of the tank |
| CN102800371A (en) * | 2012-05-04 | 2012-11-28 | 中广核工程有限公司 | Flow distribution structure of reactor of nuclear power station |
Non-Patent Citations (2)
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| 王庆田等: "反应堆堆内构件仪表套管焊接变形的控制", 《核动力工程》 * |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409114A (en) * | 2014-12-12 | 2015-03-11 | 中国科学院合肥物质科学研究院 | Flow distribution device used for tank-type forced circulation reactor |
| CN105895171A (en) * | 2016-04-28 | 2016-08-24 | 中国核动力研究设计院 | Flow distributing structure for lower cavity of pressurized water reactor |
| CN107146642A (en) * | 2017-06-21 | 2017-09-08 | 四川大学 | Flow distribution device in a kind of heap of nuclear power plant reactor |
| CN107146642B (en) * | 2017-06-21 | 2023-05-12 | 中国核动力研究设计院 | Reactor flow distribution device of nuclear power station reactor |
| CN107170490A (en) * | 2017-07-14 | 2017-09-15 | 四川大学 | A kind of reactor lower chambers cooling agent is mixed and current equalizer |
| CN107170490B (en) * | 2017-07-14 | 2023-07-04 | 中国核动力研究设计院 | Reactor lower chamber coolant mixing and flow equalizing device |
| CN111681787A (en) * | 2020-06-23 | 2020-09-18 | 中国科学院上海应用物理研究所 | Lower cavity structure of reactor container and reactor container |
| CN111681786A (en) * | 2020-06-23 | 2020-09-18 | 中国科学院上海应用物理研究所 | Lower cavity structure of reactor container and reactor container |
| CN111681786B (en) * | 2020-06-23 | 2022-12-30 | 中国科学院上海应用物理研究所 | Lower cavity structure of reactor container and reactor container |
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| CN103871501B (en) | 2017-05-10 |
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