CN103871502A - Nuclear reactor lower chamber cylindrical flow distribution apparatus - Google Patents
Nuclear reactor lower chamber cylindrical flow distribution apparatus Download PDFInfo
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- CN103871502A CN103871502A CN201210540652.5A CN201210540652A CN103871502A CN 103871502 A CN103871502 A CN 103871502A CN 201210540652 A CN201210540652 A CN 201210540652A CN 103871502 A CN103871502 A CN 103871502A
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- flow distribution
- reactor
- web joint
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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 present invention relates to a nuclear reactor lower chamber cylindrical flow distribution apparatus, which is arranged in the lower chamber inside the lower dome of a pressure container, and comprises a flow distribution cylinder, a connection plate and a base connection plate, wherein a reactor core lower supporting plate, the flow distribution cylinder, the connection plate and the base connection plate share the same axis line and are sequentially arranged from top to bottom, the nuclear reactor lower chamber cylindrical flow distribution apparatus further comprises a radially projecting supporting ring arranged on the inner surface of the lower dome of the reactor, the flow distribution cylinder is a cylindrical structure, and the lower end is fixed on the supporting ring. According to the present invention, the reactor lower chamber structure is simplified, and the stability and the reliability are improved; the coolant flow distribution of the nuclear reactor lower chamber is achieved, and the phenomenon of the uneven flow field on the reactor core inlet region is overcome; and the nuclear reactor lower chamber cylindrical flow distribution apparatus has characteristics of simple structure, cost reducing and economy improving.
Description
Technical field
The present invention relates to field of pressurized water reactor nuclear, be specifically related to a kind of reactor lower chambers cartridge type 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 cartridge type 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 cartridge type flow distribution device, and it is arranged in the lower chambers in pressure vessel low head, comprising: assignment of traffic cylinder, web joint, basic web joint; Reactor core lower supporting plate, assignment of traffic cylinder, web joint, basic web joint coaxial line, and arrange successively from top to bottom; Also comprise the support ring that is arranged on described reactor low head inside surface and radially protrudes; Described assignment of traffic cylinder is tubular structure, and its lower end is fixed on described support ring.
Described assignment of traffic cylinder barrel from top to bottom staggered floor is furnished with 9 ~ 12 laminar flow water holes.
The external diameter of described assignment of traffic cylinder is 1.5R ~ 1.8R, and axial height is 0.2R ~ 0.3R, and barrel is thick is 0.02R ~ 0.04R; Wherein, R is the internal diameter of described pressure vessel low head.
The internal diameter of described discharge orifice is 0.02R ~ 0.04R.
When reactor is during in cold conditions, the vertical range of the upper surface of described assignment of traffic cylinder and reactor core lower supporting plate lower surface is 0.02R ~ 0.027R; When reactor is when hot, the vertical range of the upper surface of described assignment of traffic cylinder and reactor core lower supporting plate lower surface is 0.01R ~ 0.19R.
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 cartridge type flow distribution device schematic diagram;
Fig. 2 is assignment of traffic cylinder schematic diagram in a kind of nuclear reactor lower chambers of the present invention cartridge type flow distribution device;
Fig. 3 is assignment of traffic cylinder vertical view in a kind of nuclear reactor lower chambers of the present invention cartridge type flow distribution device;
Fig. 4 is web joint schematic diagram in a kind of nuclear reactor lower chambers of the present invention cartridge type flow distribution device;
Fig. 5 is basic web joint schematic diagram in a kind of nuclear reactor lower chambers of the present invention cartridge type flow distribution device;
In figure: 1-reactor core lower supporting plate; 2-assignment of traffic cylinder; 201-discharge orifice; 202-inner flange; 3-support ring; 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 cartridge type flow distribution device, it is arranged in the lower chambers in pressure vessel 8 low heads, comprising: assignment of traffic cylinder 2, web joint 5, basic web joint 7; Described assignment of traffic cylinder 2, web joint 5, basic web joint 7 and reactor core lower supporting plate 1 coaxial line;
The inside radius of described pressure vessel low head is R, gets R=2200mm; In described lower chambers 10, be also welded with the support ring 3 radially protruding at described reactor low head inside surface;
Described assignment of traffic cylinder 2 is tubular structure, and it is provided with inner flange 202, and it is fixed by screws on described support ring 3 by described inner flange 202; Described assignment of traffic cylinder 2 barrels from top to bottom staggered floor are furnished with 11 laminar flow water holes 201; The external diameter of described assignment of traffic cylinder 2 is 3800mm, and axial height is 600mm, and its barrel is thick is 50mm; The internal diameter of described discharge orifice 201 is 50mm;
In the time of cold conditions, i.e., when reactor shutdown, the vertical range of described assignment of traffic cylinder 2 upper surfaces and reactor core lower supporting plate 1 lower surface is 50.8mm; When hot, i.e., when reactor operation, the vertical range of described assignment of traffic cylinder 2 upper surfaces and reactor core lower supporting plate 1 lower surface is 37.5mm; Design is when guaranteeing when the reactor operation and in accident conditions like this, and reactor core lower supporting plate 1 does not all contact with described assignment of traffic cylinder 2.
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 assignment of traffic cylinder 2 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 cartridge type flow distribution device, it is arranged in the lower chambers in pressure vessel low head, it is characterized in that: comprising: assignment of traffic cylinder, web joint, basic web joint; Reactor core lower supporting plate, assignment of traffic cylinder, web joint, basic web joint coaxial line, and arrange successively from top to bottom; Also comprise the support ring that is arranged on described reactor low head inside surface and radially protrudes; Described assignment of traffic cylinder is tubular structure, and its lower end is fixed on described support ring.
2. according to nuclear reactor lower chambers flow distribution device claimed in claim 1, it is characterized in that: described assignment of traffic cylinder barrel from top to bottom staggered floor is furnished with 9 ~ 12 laminar flow water holes.
3. according to nuclear reactor lower chambers cartridge type flow distribution device claimed in claim 2, it is characterized in that: the external diameter of described assignment of traffic cylinder is 1.5R ~ 1.8R, axial height is 0.2R ~ 0.3R, and barrel is thick is 0.02R ~ 0.04R; Wherein, R is the inside radius of described pressure vessel low head.
4. according to nuclear reactor lower chambers cartridge type flow distribution device claimed in claim 3, it is characterized in that: the internal diameter of described discharge orifice is 0.02R ~ 0.04R.
5. according to nuclear reactor lower chambers cartridge type flow distribution device claimed in claim 4, it is characterized in that: when reactor is during in cold conditions, the vertical range of the upper surface of described assignment of traffic cylinder and reactor core lower supporting plate lower surface is 0.02R ~ 0.027R; When reactor is when hot, the vertical range of the upper surface of described assignment of traffic cylinder and reactor core lower supporting plate lower surface is 0.01R ~ 0.19R.
6. according to nuclear reactor lower chambers cartridge type flow distribution device claimed in claim 3, 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 cartridge type 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 cartridge type flow distribution device claimed in claim 3, 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 cartridge type 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 |
|---|---|---|---|
| CN201210540652.5A CN103871502A (en) | 2012-12-14 | 2012-12-14 | Nuclear reactor lower chamber cylindrical flow distribution apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210540652.5A CN103871502A (en) | 2012-12-14 | 2012-12-14 | Nuclear reactor lower chamber cylindrical flow distribution apparatus |
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| CN103871502A true CN103871502A (en) | 2014-06-18 |
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| CN201210540652.5A Pending CN103871502A (en) | 2012-12-14 | 2012-12-14 | Nuclear reactor lower chamber cylindrical flow distribution apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107221368A (en) * | 2017-07-26 | 2017-09-29 | 四川大学 | Reactor coolant presses down whirlpool and flow distribution device and reactor core internals |
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| CN1080774A (en) * | 1992-06-24 | 1994-01-12 | 西屋电气公司 | Stop the nuclear reactor coolant fluid to form the device of vortex |
| US5436945A (en) * | 1993-12-03 | 1995-07-25 | Combustion Engineering, Inc. | Shadow shielding |
| EP1006533A1 (en) * | 1998-12-01 | 2000-06-07 | Framatome | Vessel for a pressurized water reactor with a device for stilling cooling water flow in vessel bottom head |
| US20070133732A1 (en) * | 2003-06-18 | 2007-06-14 | Katsuyuki Nakayama | Nuclear reactor internal structure |
| CN101606204A (en) * | 2007-02-12 | 2009-12-16 | 西屋电气有限责任公司 | Pressurized water reactor flow skirt apparatus |
| JP2012149996A (en) * | 2011-01-19 | 2012-08-09 | Toshiba Corp | Pressurized-water reactor |
| 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 |
-
2012
- 2012-12-14 CN CN201210540652.5A patent/CN103871502A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080774A (en) * | 1992-06-24 | 1994-01-12 | 西屋电气公司 | Stop the nuclear reactor coolant fluid to form the device of vortex |
| US5436945A (en) * | 1993-12-03 | 1995-07-25 | Combustion Engineering, Inc. | Shadow shielding |
| EP1006533A1 (en) * | 1998-12-01 | 2000-06-07 | Framatome | Vessel for a pressurized water reactor with a device for stilling cooling water flow in vessel bottom head |
| US20070133732A1 (en) * | 2003-06-18 | 2007-06-14 | Katsuyuki Nakayama | Nuclear reactor internal structure |
| CN101606204A (en) * | 2007-02-12 | 2009-12-16 | 西屋电气有限责任公司 | Pressurized water reactor flow skirt apparatus |
| JP2012149996A (en) * | 2011-01-19 | 2012-08-09 | Toshiba Corp | Pressurized-water reactor |
| 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107221368A (en) * | 2017-07-26 | 2017-09-29 | 四川大学 | Reactor coolant presses down whirlpool and flow distribution device and reactor core internals |
| CN107221368B (en) * | 2017-07-26 | 2023-07-04 | 中国核动力研究设计院 | Reactor coolant vortex suppression and flow distribution device and reactor internal component |
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Application publication date: 20140618 |
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