CN103871501B - Flow distributor of nuclear reactor lower chamber - Google Patents
Flow distributor of nuclear reactor lower chamber Download PDFInfo
- Publication number
- CN103871501B CN103871501B CN201210540512.8A CN201210540512A CN103871501B CN 103871501 B CN103871501 B CN 103871501B CN 201210540512 A CN201210540512 A CN 201210540512A CN 103871501 B CN103871501 B CN 103871501B
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- connecting plate
- flow distribution
- reactor core
- reactor
- plate
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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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- Monitoring And Testing Of Nuclear Reactors (AREA)
- 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, and in particular to a kind of reactor lower chambers for pressurized-water reactor nuclear power plant
Flow distribution device.
Background technology
At present in the secondary and secondary modified model pressurized water nuclear reactor of operation, reactor core neutron flux measurement detector is from pressure
Force container low head is drawn, therefore the parts such as instrumentation thimble and penetration piece is provided with low head, these instrumentation thimbles, runs through
Part can be mixed the shape to suppress to be vortexed together with structures such as screen work plate, secondary support columns to the coolant flow field of lower chambers
Into while evenly distributing to the flow into reactor core.However, at low head penetration piece presence, increased low head dive
In the risk of failure, and cavity of resorption cell structure is extremely complex.Third generation pressurized water reactor core measuring instrumentss are by pressure vessel upper cover
Draw, considerably simplify reactor cavity of resorption cell structure, but reactor core entrance area flow field will be caused to produce inhomogeneities,
Therefore, it is to meet the requirement that evenly distributes of coolant into reactor core, lifts reactor overall performance, need in reactor cavity of resorption
Room arranges a kind of flow distribution device.
The content of the invention
The technical problem to be solved of the present invention is to provide a kind of In-core Instrumentation instrument that is applied to by pressure vessel upper cover
The reactor of extraction, and reactor core entrance area efficiency loss can be overcome, the coolant met into reactor core is evenly distributed
The lower chambers flow distribution device of requirement.
In order to solve above-mentioned technical problem, the technical scheme is that, a kind of nuclear reactor lower chambers assignment of traffic dress
Put, which is arranged in the lower chambers in lower head of pressure vessel, including：Flow distribution baffle, connecting plate, basic connecting plate；Reaction
Heap reactor core lower supporting plate, flow distribution baffle, connecting plate, basic connecting plate coaxial line, and be sequentially arranged from top to bottom.
The flow distribution baffle be annular slab, its external diameter be 1.5R ~ 1.7R, internal diameter be R ~ 1.3R, thickness of slab be 0.02 ~
0.04R；
Wherein, R is the pressure vessel inside radius.
The flow distribution baffle is provided with several axially penetrating discharge orifices.
The circumferentially extending radian of the discharge orifice is 18 °, and its radial width is 0.08R ~ 0.1R.
The flow distribution baffle upper surface is 0.2R ~ 0.4R with the vertical dimension of the lower surface of reactor core lower supporting plate.
The connecting plate is annular slab, is provided with several axially penetrating openings.
The connecting plate external diameter is 0.9R ~ 1.1R, and thickness of slab is 0.02 ~ 0.04R；The upper surface of the connecting plate and the heap
The vertical dimension of core lower supporting plate is 0.43R ~ 0.6R.
The basic connecting plate is square plate structure, and its central authorities is provided with square open-work.
The lower surface of the basic connecting plate is 0.7R ~ 0.9R with the vertical dimension of the lower surface of reactor core lower supporting plate；Institute
The axial distance of the lower surface and lower head of pressure vessel inner surface of stating basic connecting plate is 0.01R ~ 0.03R.
Beneficial effects of the present invention：
（1）The present invention simplifies reactor cavity of resorption cell structure, improves stability and reliability；
（2）The present invention realizes the distribution of reactor lower chambers coolant flow, overcomes reactor core entrance area flow field uneven
Even phenomenon；
（3）Present configuration is simple, reduces cost, and improves economy.
Description of the drawings
Fig. 1 is a kind of nuclear reactor lower chambers flow distribution device schematic diagram of the invention；
Fig. 2 is flow distribution baffle schematic diagram in a kind of nuclear reactor lower chambers flow distribution device of the invention；
Fig. 3 is connecting plate schematic diagram in a kind of nuclear reactor lower chambers flow distribution device of the invention；
Fig. 4 is basic connecting plate schematic diagram in a kind of nuclear reactor lower chambers flow distribution device of the invention；
In figure：1- reactor core lower support plates；2- connecting poles；3- flow distribution baffles；301- discharge orifices；302- connecting poles connect
Hole；Bis- support columns of 4-；5- connecting plates；6- acceptor of energies；7- bases connecting plate；8- pressure vessels；9- lower chambers；Under 10-
Drop chamber；11- radial supporters.
Specific embodiment
The present invention is described further below in conjunction with drawings and Examples.
Nuclear power plant reactor includes pressure vessel 8, is provided with hanging basket component, under the hanging basket component in the pressure vessel 8
End is provided with reactor core lower supporting plate 1, and the reactor core lower supporting plate 1 is supported on reactor core radial supporter 11, the hanging basket component
A decline chamber 10 is formed between the inwall of outer wall and pressure vessel 8；Lower of reactor core is in the low head of the pressure vessel 8
The region of 1 bottom of fagging is lower chambers 9；During reactor operation, coolant Jing cold legs enter pressure vessel 8, and Jing declines chamber
10 flow into the lower chambers 9；Coolant is upward through reactor core lower supporting plate 1 after mixing in lower chambers 9 into reactor core and reactor core
Fuel component carries out fluid interchange, most after Jing pressure vessels 8 heat pipe section outflow pressure container 8；
A kind of nuclear reactor lower chambers flow distribution device of the present invention, which is arranged on the cavity of resorption in 8 low head of pressure vessel
In room, including：Flow distribution baffle 3, connecting plate 5, basic connecting plate 7；The flow distribution baffle 3, connecting plate 5 and basic connecting plate
7 with 1 coaxial line of reactor core lower supporting plate；
The inside radius of the lower head of pressure vessel is 2200mm；The flow distribution baffle 3 be annular slab, the annular slab
External diameter is 3400mm, and internal diameter is 2682mm；The axial width of the annular slab is 51.6mm；The annular slab is provided with 8 axial directions
Penetrating discharge orifice 301；The circumferentially extending radian of each discharge orifice 301 is 18 °, and its radial width is 200mm；
4 connecting pole connecting holes, 302,42 one end of connecting pole are additionally provided with the annular slab and are fixed by screws in institute
State on connecting pole connecting hole 302, the other end is fixed by screws in the lower surface of reactor core lower supporting plate 1；The annular slab upper table
Face is 570mm with the vertical dimension of the lower surface of reactor core lower supporting plate 1；
The external diameter of the connecting plate 5 is 2422mm, and which is in integrally discoideus, and center is provided with a centre bore, centre bore
4 openings are provided with the plate face between its outward flange；The connecting plate 5 is connected to lower of reactor core by 12 secondary support columns 4
The lower surface of fagging 1；Described 12 secondary support columns, 4 one end is fixed with the connecting plate 5 by screw, and the other end passes through screw
Fix with the lower surface of the reactor core lower supporting plate 1；The upper surface of the connecting plate 5 is vertical with the reactor core lower supporting plate 1
Distance is 1066.8mm；The axial width of the connecting plate 5 is 51.6mm；
The basic connecting plate 7 is square plate structure, and its central authorities is provided with a square open-work；4 acceptor of energies
One end is fixed on the upper surface of the basic connecting plate 7, and the other end is fixed on the lower surface of the connecting plate 5；The basis is even
The lower surface of fishplate bar 7 is 1682.8mm with the vertical dimension of the lower surface of the reactor core lower supporting plate 1；The basic connecting plate 7
Lower surface outward flange and the lower head of pressure vessel inner surface axial distance be 26.9mm；
A kind of pressurized water nuclear reactor lower chambers flow distribution device of the present invention, enormously simplify reactor lower chambers knot
Structure, improves structural stability and reliability.Before and after using the flow distribution baffle 3,9 coolant flux distribution of lower chambers is uneven
Factor value of calculation is substantially reduced, and meets the requirement of thermal-hydraulic, and the distribution for solving 9 coolant flow of lower chambers very well is uneven
Problem, be obviously improved reactor overall performance.
Claims (1)
1. a kind of nuclear reactor lower chambers flow distribution device, which is arranged in the lower chambers in lower head of pressure vessel, and which is special
Levy and be：Including：Flow distribution baffle, connecting plate, basic connecting plate；Reactor core lower supporting plate, flow distribution baffle, connection
Plate, basic connecting plate coaxial line, and be sequentially arranged from top to bottom；The flow distribution baffle is annular slab, and its external diameter is 1.5R
～1.7R, internal diameter are R～1.3R, and thickness of slab is 0.02～0.04R；Wherein, R is pressure vessel inside radius；The flow distribution baffle
It is provided with several axially penetrating discharge orifices；The circumferentially extending radian of the discharge orifice is 18 °, and its radial width is 0.08R
～0.1R；The flow distribution baffle upper surface is 0.2R～0.4R with the vertical dimension of the lower surface of reactor core lower supporting plate；It is described
Connecting plate is annular slab, is provided with several axially penetrating openings；The connecting plate external diameter be 0.9R～1.1R, thickness of slab
For 0.02～0.04R；The upper surface of the connecting plate is 0.43R～0.6R with the vertical dimension of the reactor core lower supporting plate；Institute
It is square plate structure to state basic connecting plate, and its central authorities is provided with square open-work；The lower surface and reactor core of the basic connecting plate
The vertical dimension of the lower surface of lower supporting plate is 0.7R～0.9R；The lower surface and lower head of pressure vessel of the basic connecting plate
The axial distance of inner 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 CN103871501A (en) | 2014-06-18 |
| CN103871501B true CN103871501B (en) | 2017-05-10 |
Family
ID=50909940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210540512.8A Active CN103871501B (en) | 2012-12-14 | 2012-12-14 | Flow distributor of nuclear reactor lower chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103871501B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409114B (en) * | 2014-12-12 | 2017-05-31 | 中国科学院合肥物质科学研究院 | A kind of flow distribution device for pool 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 |
| 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 |
| 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 |
| CN111681787B (en) * | 2020-06-23 | 2022-09-30 | 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62106888A (en) * | 1985-11-01 | 1987-05-18 | Hitachi Ltd | Apparatus for desalting condensed water |
-
2012
- 2012-12-14 CN CN201210540512.8A patent/CN103871501B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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)
| Title |
|---|
| AP1000二次堆芯支承组件流致振动初步分析;钱浩等;《核动力工程》;20110630;第32卷;第145～149页 * |
| 反应堆堆内构件仪表套管焊接变形的控制;王庆田等;《核动力工程》;20120831;第33卷(第4期);第67～71页 * |
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| Publication number | Publication date |
|---|---|
| CN103871501A (en) | 2014-06-18 |
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