CN107170491A - Flow distribution device in a kind of pressurized water type reactor based on dome structure - Google Patents
Flow distribution device in a kind of pressurized water type reactor based on dome structure Download PDFInfo
- Publication number
- CN107170491A CN107170491A CN201710575119.5A CN201710575119A CN107170491A CN 107170491 A CN107170491 A CN 107170491A CN 201710575119 A CN201710575119 A CN 201710575119A CN 107170491 A CN107170491 A CN 107170491A
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- Prior art keywords
- plate
- disappears
- whirlpool
- dome structure
- whirlpool plate
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
- G21C15/12—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from pressure vessel; from containment vessel
-
- 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
Abstract
The invention discloses flow distribution device in a kind of pressurized water type reactor based on dome structure, it includes pressure vessel（1）, reactor core lower support plate（10）, dome structure（4）, three-dimensional homogenizing plate（2）And energy absorbing device（5）, positioned at the whirlpool plate that laterally disappears（7）Between and the whirlpool plate that transversely disappears（7）Circumferencial direction multiple longitudinal directions be distributed with disappear whirlpool plate（6）, often enclose the whirlpool plate that laterally disappears（7）Outside be provided with the guiding conical surface（8）, dome structure（4）Pass through the ring flange at the top of it（3）With reactor core lower support plate（10）It is connected；The three-dimensional homogenizing plate（2）It is arranged at longitudinal whirlpool plate that disappears（6）With the whirlpool plate that laterally disappears（7）In area defined, energy absorbing device（5）Positioned at dome structure（4）Close to pressure vessel（1）Lower chambers bottom and it is fixedly arranged on most foundation ring and laterally disappears whirlpool plate（7）With longitudinal whirlpool plate that disappears（6）Infall.The beneficial effects of the invention are as follows：Elimination venturi effect is good, mixing effect, good, assignment of traffic is uniform, substitute original support column assembling.
Description
Technical field
The present invention relates to technical field of nuclear power, assignment of traffic in particularly a kind of pressurized water type reactor based on dome structure
Device.
Background technology
The pressurized water type reactor of nuclear power station is made up of parts such as reactor pressure vessel, in-pile component, reactor core assemblies.In heap
Component, internal pressure vessel walls and fuel assembly structure constitute the passage of cooling agent flowing.Cooling agent is respectively by cold leg and heat pipe
Section is flowed into from the entrance of reactor pressure vessel, changes flow direction by hitting hanging basket outer wall, under gravity big portion
Divide refrigerant downstream, mixed with other cooling agents；Due to the presence of two kinds of temperature water inlet segments, cause the flowing of cooling agent
Without symmetry, mobility status is more complicated, and the assignment of traffic for ultimately resulting in reactor core entrance is uneven.The flow of reactor core entrance point
With an important indicator for being reactor hydraulic performance, the change of influence heap internal power peak factor and core power distribution, certainly
Critical heat flux density and hot channel factor in heap are determined.The flow of reactor core porch once distributes uneven, can influence heap in-core
Thermal-hydraulic behavior, and then influence the operation limit value of nuclear power station；The uneven Core cooling that also results in of assignment of traffic is insufficient, heap
The larger local temperature change of core can bring hidden danger to reactor safety operation.
According to the characteristic of flow of fluid in the design feature and heap of reactor, reactor core inlet flow rate distribution presentation center flash
The reason for low trend of edge, trend is：Due to fluid inertia, fluid has along along the lower chambers of reactor pressure vessel bottom
Wall declines and to the trend of lower chambers center flowing, and this tendency leads of cooling agent flowing cause coolant flow to enter in reactor core
The distribution of the middle part of mouth is more than reactor core entrance peripheral part.
In addition, when cooling agent is from circular fall-off chamber into lower chambers, change drastically occurs for channel size, therefore in cavity of resorption
Room produces a large amount of vortex, and on the one hand the vortex of generation increases energy consumption, cause the further skewness of flow；Another aspect whirlpool
Stream, which comes off, causes the parts such as bolt to vibrate, and parts is had the potential danger of loose or dislocation.
Existing flow distribution structure installs various parts mating reaction generally by reactor core lower support plate, but there is knot
Structure is complicated, number of parts is more, assembling is complicated, ging wrong is not easy the problems such as maintenance is changed；There is also assignment of traffic it is uneven, pressure
It is not enough that drop is excessive, whirlpool eliminates endless congruence.
The content of the invention
It is an object of the invention to the shortcoming for overcoming prior art, there is provided one kind is simple in construction, elimination venturi effect is good, stir
Mixed effect is good, assignment of traffic is uniform, substitute flow in the pressurized water type reactor based on dome structure of original support column assembling
Distributor.
The purpose of the present invention is achieved through the following technical solutions：Flowed in a kind of pressurized water type reactor based on dome structure
Distributor is measured, it includes pressure vessel, reactor core lower support plate, dome structure, three-dimensional homogenizing plate and energy absorbing device, institute
State the bottom chamber that dome structure is arranged at pressure vessel, dome structure is laterally disappeared by disappear whirlpool plate, multi-turn of the longitudinal direction of many tabulars
Whirlpool plate and ring flange composition, positioned at laterally disappearing between the plate of whirlpool and the circumferencial direction for the whirlpool plate that transversely disappears is distributed with multiple longitudinal directions and disappeared whirlpool
Plate, often encloses laterally to disappear on the outside of the plate of whirlpool and is provided with the guiding conical surface, each circle laterally disappear whirlpool plate the guiding conical surface cone angle from it is lower toward
On successively decrease successively, dome structure is connected by the ring flange at the top of it with reactor core lower support plate；The three-dimensional homogenizing plate
It is arranged at longitudinal whirlpool plate that disappears with horizontal to disappear in the plate area defined of whirlpool, is provided with bending side in the middle part of three-dimensional homogenizing plate and divides thereon
It is furnished with several discharge orifices；The energy absorbing device is positioned at dome structure is close to pressure vessel lower chambers bottom and is fixedly arranged on most bottom
Horizontal whirlpool plate and the longitudinal whirlpool plate infall that disappears of disappearing of circle；Hanging basket is fixed with the top of the reactor core lower support plate.
Described transverse direction disappears on the plate lower edge of whirlpool and multiple inserting groove A are distributed with the circumferencial direction for the whirlpool plate that transversely disappears.
Described longitudinal direction disappears on the plate of whirlpool and is arranged at intervals with multiple inserting groove B along its length, and inserting groove B is stuck in grafting
In groove A.
Described ring flange is connected with reactor core lower support plate through screw thread.
Described ring flange is welded in reactor core lower support plate.
Multiple seams are provided with the outward flange of described three-dimensional homogenizing plate and along the circumferencial direction of three-dimensional homogenizing plate.
The inserting groove B of the seam of described three-dimensional homogenizing plate and longitudinal whirlpool plate that disappears coordinates.
Described transverse direction disappears whirlpool plate and longitudinal direction disappears, and the wall thickness of whirlpool plate is 20 ~ 100mm.
The present invention has advantages below：
（1）Often enclosing on the outside of the whirlpool plate that laterally disappears for the present invention is provided with the guiding conical surface, each guiding conical surface for enclosing the whirlpool plate that laterally disappears
Cone angle successively decrease successively from lower to upper, laterally disappear on the plate of whirlpool be oriented to the conical surface by cooling agent towards reactor core entrance edge water conservancy diversion, from
And alleviate more than the flow distributed amongst of reactor core porch and around distribute few trend.
（4）The longitudinal direction of dome structure disappears whirlpool plate and laterally the whirlpool plate that disappears can be cut to cooling agent, resistance in the present invention
The complete streamline of disconnected whirlpool, reaches the purpose for eliminating vortex.
（2）Dome structure has under good mechanical property, the accident conditions that hanging basket falls, and impulsive force can be uniformly divided
Dissipate and be delivered to reactor core lower support plate edge, therefore original column can be saved, play a part of simplified structure；Avoid simultaneously
In the core flow distribution region punching assembling column of reactor core lower support plate, make assignment of traffic evenly.
（3）It is provided with the middle part of the three-dimensional homogenizing plate of the present invention on bending side, three-dimensional homogenizing plate and several discharge orifices is distributed with, is stood
Body homogenizing plate compares general plane homogenizing plate, and three-dimensional homogenizing plate developed area is more than platen area, i.e., stood in unit area
The flowing water hole number of body homogenizing plate is more than the flowing water hole number of flat board, expands Spatial Dimension respectively to increase the face that flow is divided equally
Product, makes fluid-pressure drop and structural drag coefficient small.Three-dimensional homogenizing plate carries out secondary distribution to cooling agent, realizes that flow is accurately average
Distribution.
（5）The dome structure of the present invention connects as one energy absorbing device with reactor core lower support plate, instead of original
The form installed with column, the screw used is less, simplifies assembling, overall structure is more simplified.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is Fig. 1 main sectional view；
Fig. 3 is the structural representation of neutral body homogenizing plate of the present invention；
Fig. 4 is the structural representation of whirlpool plate of laterally disappearing in the present invention；
Fig. 5 is the structural representation of whirlpool plate of longitudinally disappearing in the present invention；
Fig. 6 is the structural representation of dome structure；
In figure, 1- pressure vessels, 2- solid homogenizing plates, 3- ring flanges, 4- dome structures, 5- energy absorbing devices, 6- longitudinally disappears
Whirlpool plate, 7- laterally disappears whirlpool plate, and 8- is oriented to the conical surface, 9- discharge orifices, 10- reactor core lower support plates, 11- hanging baskets, 12- inserting grooves A, 13-
Screw, 14- seams, 15- inserting grooves B.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings, and protection scope of the present invention is not limited to as described below：
As shown in Fig. 1 ~ 6, flow distribution device in a kind of pressurized water type reactor based on dome structure, it include pressure vessel 1,
Reactor core lower support plate 10, dome structure 4, three-dimensional homogenizing plate 2 and energy absorbing device 5, the dome structure are arranged at pressure
The bottom chamber of container 1, dome structure 4 is laterally disappeared 3 groups of whirlpool plate 7 and ring flange by disappear whirlpool plate 6, multi-turn of the longitudinal direction of many tabulars
Into positioned at laterally disappearing between whirlpool plate 7 and the circumferencial direction for the whirlpool plate 7 that transversely disappears is distributed with multiple longitudinal directions and disappeared whirlpool plate 6, laterally disappear whirlpool
The wall thickness of plate 7 and longitudinal whirlpool plate 6 that disappears is 20 ~ 100mm, and the outside for often enclosing the whirlpool plate 7 that laterally disappears is provided with the guiding conical surface 8, respectively
The cone angle of the guiding conical surface 8 of the horizontal whirlpool plate 7 that disappears of circle successively decreases successively from lower to upper, and dome structure 4 passes through the flange at the top of it
Disk 3 is connected with reactor core lower support plate 10.
The three-dimensional homogenizing plate 2 is arranged at longitudinal whirlpool plate 6 that disappears and disappeared with horizontal in the area defined of whirlpool plate 7, and solid flows
The middle part of plate 2 is provided with bending side and several discharge orifices 9 is distributed with thereon, and three-dimensional homogenizing plate 2 compares general plane homogenizing plate, stands
Body homogenizing plate developed area is more than platen area, i.e., the quantity of discharge orifice 9 of three-dimensional homogenizing plate 2 is more than flat board in unit area
Flowing water hole number, expands Spatial Dimension respectively to increase the area that flow is divided equally.Three-dimensional folding on described three-dimensional homogenizing plate 2
Face can also play reinforcement, make structure more resistant to fluid scouring.
The energy absorbing device 5 is located at dome structure 4 close to the lower chambers bottom of pressure vessel 1 and is fixedly arranged on most foundation ring horizontal stroke
To whirlpool plate 7 and the longitudinal infall of whirlpool plate 6 that disappears of disappearing；The top of the reactor core lower support plate 10 is fixed with hanging basket 11.
Described transverse direction disappears on the lower edge of whirlpool plate 7 and multiple inserting grooves are distributed with the circumferencial direction for the whirlpool plate 7 that transversely disappears
A12, described longitudinal direction disappears on whirlpool plate 6 and is arranged at intervals with multiple inserting groove B15 along its length, and inserting groove B15 is stuck in slotting
In access slot A12.
Described ring flange 3 is threadedly coupled with reactor core lower support plate 10 through screw 13.Described ring flange 3 is welded in reactor core
In lower support plate 10.Multiple stop is provided with the outward flange of described three-dimensional homogenizing plate 2 and along the circumferencial direction of three-dimensional homogenizing plate 2
Mouth 14, the described seam 14 of three-dimensional homogenizing plate 2 and the inserting groove B15 of longitudinal whirlpool plate 6 that disappears coordinates and is welded in one.
The course of work of the present invention is as follows：Reactor core is first placed in the top of reactor core lower support plate 10, to hanging basket 11 and pressure
Cooling agent is passed through in region between the inwall of container 1, cooling agent is along along the inwall flow process of pressure vessel 1, and laterally disappear the He of whirlpool plate 7
The whirlpool plate 6 that longitudinally disappears is cut to cooling agent, blocks the complete streamline of whirlpool, reaches the purpose for eliminating vortex, at the same time horizontal
To disappear on whirlpool plate 7 be oriented to the conical surface 8 by cooling agent towards reactor core entrance edge water conservancy diversion, so as to alleviate in the flow of reactor core porch
Between distribute many and surrounding distributes few trend；After cooling agent enters in dome structure, realize the preliminary of flow and divide equally, in pressure
Cooling agent in the lower dome structure of power effect enters reactor core through the discharge orifice 9 on three-dimensional homogenizing plate 2, reactor core lower support plate 10
Interior, three-dimensional homogenizing plate 2 carries out secondary distribution to cooling agent, reaches the purpose of the accurate mean allocation of flow, finally realizes reactor core
Evenly distributing for inlet flow rate, evenly distributes rear cooling agent and enters in reactor core.
When the accident conditions that generation hanging basket 11 comes off, energy absorbing device 5 touches the bottom of contact container 1 first
Portion, energy absorbing device 5 absorbs a part of impulsive force, and most impulsive force is uniformly divided by the longitudinal direction of the dome structure whirlpool plate that disappears
Cloth is to the edge of reactor core lower support plate 10, it is to avoid reactor core drops, with it is safe and reliable the characteristics of, further ensure to reactor core
Normal cooling.
Claims (8)
1. flow distribution device in a kind of pressurized water type reactor based on dome structure, it is characterised in that：It includes pressure vessel
（1）, reactor core lower support plate（10）, dome structure（4）, three-dimensional homogenizing plate（2）And energy absorbing device（5）, the dome knot
Structure is arranged at pressure vessel（1）Bottom chamber, dome structure（4）Disappeared whirlpool plate by the longitudinal direction of many tabulars（6）, multi-turn laterally disappears
Whirlpool plate（7）And ring flange（3）Composition, positioned at the whirlpool plate that laterally disappears（7）Between and the whirlpool plate that transversely disappears（7）Circumferencial direction be distributed with
Multiple longitudinal directions disappear whirlpool plate（6）, often enclose the whirlpool plate that laterally disappears（7）Outside be provided with the guiding conical surface（8）, each horizontal whirlpool plate that disappears of circle
（7）The guiding conical surface（8）Cone angle successively decrease successively from lower to upper, dome structure（4）Pass through the ring flange at the top of it（3）With
Reactor core lower support plate（10）It is connected；The three-dimensional homogenizing plate（2）It is arranged at longitudinal whirlpool plate that disappears（6）With the whirlpool plate that laterally disappears（7）Institute
In the region surrounded, three-dimensional homogenizing plate（2）Middle part is provided with bending side and several discharge orifices is distributed with thereon（9）；The energy
Absorption plant（5）Positioned at dome structure（4）Close to pressure vessel（1）Lower chambers bottom and it is fixedly arranged on most foundation ring and laterally disappears whirlpool plate
（7）With longitudinal whirlpool plate that disappears（6）Infall；The reactor core lower support plate（10）Top be fixed with hanging basket（11）.
2. flow distribution device, its feature in a kind of pressurized water type reactor based on dome structure according to claim 1
It is：Described transverse direction disappears whirlpool plate（7）Disappear on lower edge and transversely whirlpool plate（7）Circumferencial direction multiple inserting groove A are distributed with
（12）.
3. flow distribution device, its feature in a kind of pressurized water type reactor based on dome structure according to claim 1
It is：Described longitudinal direction disappears whirlpool plate（6）It is arranged at intervals with above and along its length multiple inserting groove B（15）, inserting groove B（15）
It is stuck in inserting groove A（12）It is interior.
4. flow distribution device, its feature in a kind of pressurized water type reactor based on dome structure according to claim 1
It is：Described ring flange（3）With reactor core lower support plate（10）Through screw（13）Threaded connection.
5. flow distribution device, its feature in a kind of pressurized water type reactor based on dome structure according to claim 4
It is：Described ring flange（3）It is welded in reactor core lower support plate（10）On.
6. flow distribution device, its feature in a kind of pressurized water type reactor based on dome structure according to claim 1
It is：Described three-dimensional homogenizing plate（2）Outward flange on and along three-dimensional homogenizing plate（2）Circumferencial direction be provided with multiple seams
（14）.
7. flow distribution device, its feature in a kind of pressurized water type reactor based on dome structure according to claim 6
It is：Described three-dimensional homogenizing plate（2）Seam（14）With longitudinal whirlpool plate that disappears（6）Inserting groove B（15）Coordinate.
8. flow distribution device, its feature in a kind of pressurized water type reactor based on dome structure according to claim 1
It is：Described transverse direction disappears whirlpool plate（7）With longitudinal whirlpool plate that disappears（6）Wall thickness be 20 ~ 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575119.5A CN107170491B (en) | 2017-07-14 | 2017-07-14 | Pressurized water reactor flow distribution device based on dome structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575119.5A CN107170491B (en) | 2017-07-14 | 2017-07-14 | Pressurized water reactor flow distribution device based on dome structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107170491A true CN107170491A (en) | 2017-09-15 |
| CN107170491B CN107170491B (en) | 2023-07-04 |
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|---|---|---|---|
| CN201710575119.5A Active CN107170491B (en) | 2017-07-14 | 2017-07-14 | Pressurized water reactor flow distribution device based on dome structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112185598A (en) * | 2020-09-30 | 2021-01-05 | 中国核动力研究设计院 | Stacking type flow distribution device and distribution structure |
| CN114912215A (en) * | 2022-04-25 | 2022-08-16 | 安徽理工大学 | Topological structure optimization method of anchor-shotcrete supporting tray with high energy absorption characteristic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112185598A (en) * | 2020-09-30 | 2021-01-05 | 中国核动力研究设计院 | Stacking type flow distribution device and distribution structure |
| CN112185598B (en) * | 2020-09-30 | 2022-02-01 | 中国核动力研究设计院 | Stacking type flow distribution device and distribution structure |
| CN114912215A (en) * | 2022-04-25 | 2022-08-16 | 安徽理工大学 | Topological structure optimization method of anchor-shotcrete supporting tray with high energy absorption characteristic |
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| Publication number | Publication date |
|---|---|
| CN107170491B (en) | 2023-07-04 |
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