CN105895171A - Flow distributing structure for lower cavity of pressurized water reactor - Google Patents
Flow distributing structure for lower cavity of pressurized water reactor Download PDFInfo
- Publication number
- CN105895171A CN105895171A CN201610273539.3A CN201610273539A CN105895171A CN 105895171 A CN105895171 A CN 105895171A CN 201610273539 A CN201610273539 A CN 201610273539A CN 105895171 A CN105895171 A CN 105895171A
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- CN
- China
- Prior art keywords
- flow distribution
- flow
- connecting plate
- assignment
- pressurized water
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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 a flow distributing structure for the lower cavity of a pressurized water reactor. The flow distributing structure comprises a pressure container lower sealing head, a pressure container and a boss fixed in the pressure container, wherein a reactor core support plate is mounted on the boss, a connecting plate is fixedly connected below the reactor core support plate through a secondary support column, a foundation connecting plate is connected below the connecting plate through an energy absorber, and a flow distributing device is further mounted below the reactor core support plate through a connecting column. Due to the fact that the flow distributing device is mounted below the reactor core support plate, the flow distributing structure is suitable for the third-generation pressure container structure, an even coolant flow field can be formed at a reactor core inlet, and the production condition requirements of the pressurized water reactor can be met.
Description
Technical field
The present invention relates to the lower chambers internal structure of reactor, a kind of flow distribution structure for pressurized water type reactor lower chambers.
Background technology
In pressurized water type reactor, coolant is entered pressure vessel by pressure container inlet adapter, along the ring cavity between pressure vessel and hanging basket, flow downwardly to lower head of pressure vessel, reactor core is entered after low head chamber, core support plate, taking away the heat that reactor fuel rod produces, coolant, through upper core plate, flows out from pressure vessel outlet adapter.Reactor lower chambers structure is made up of parts such as core support plate, secondary support column, acceptor of energy, novel reaction heap lower chambers flow distribution structure and lower head of pressure vessel.In order to maintain whole reactor core suitably and uniformly to cool down, uniform coolant flow field should be maintained in reactor core porch.
In the secondary and secondary modified model pressurized water type reactor run at present, reactor core neutron flux measurement detector is drawn from lower head of pressure vessel, at low head, is therefore provided with the parts such as instrumentation thimble and penetration piece.The coolant flow field of lower chambers can be mixed to suppress the formation of eddy current by the structures such as these instrumentation thimbles, screen work plate and secondary support column, redistributes the flow entering reactor core simultaneously.But, the existence of penetration piece at low head, add the risk of low head potential failure, and lower chambers structure is extremely complex.
In order to improve the safety of reactor structure, reduce the probability of accident conditions Lower head failure, In-core Instrumentation detector is all changed into drawing from pressure vessels top cover by three generations's pressurized water type reactor at present, lower head of pressure vessel no longer arranges penetration piece, so needing the parts such as the instrumentation thimble of cancellation bottom in-pile component, causing reactor core entrance area flow field to produce inhomogeneities, current structure can not meet safety standards.
Summary of the invention
It is an object of the invention to provide and be applied to a kind of flow distribution structure for pressurized water type reactor lower chambers, solve the problem that current sealing structure is not applied for the structure of new lower head of pressure vessel so that form uniform coolant flow field in reactor core porch.
The purpose of the present invention is achieved through the following technical solutions:
A kind of flow distribution structure for pressurized water type reactor lower chambers, including lower head of pressure vessel, pressure vessel and the boss being fixed in pressure vessel, boss is provided with core plate, it is fixedly connected with connecting plate by secondary support column below core plate, connected by acceptor of energy below connecting plate and have basic connecting plate, below described core plate, also by connection post, flow distribution device is installed.The present invention uses the mode installing flow distribution device below core plate, is suitable for the construction of pressure vessel of the third generation, can form uniform coolant flow field in reactor core porch, meet the demand of presurized water reactor production status.
Described flow distribution device includes that one is positioned at above connecting plate and the flow distribution baffle parallel with connecting plate, flow distribution baffle is circular, flow distribution baffle is provided with flow distributing hole, also include an assignment of traffic cover being connected to outside flow distribution baffle, assignment of traffic cover is cylindrically, and coaxial with flow distribution baffle, assignment of traffic cover is provided with discharge orifice.Specifically, flow distribution device is a Welding Structure, including assignment of traffic cover, flow distribution baffle, it is connected with core support plate by connecting post, assignment of traffic cover is a circular ring structure having multilamellar discharge orifice, the coolant entering lower chambers is carried out uniform assignment of traffic, flow distribution baffle is a ring-plane structure, except in addition to being connected post cooperation position, the flow distributing hole of Different Rule is had in remaining position, coolant is mixed further and distributes, connecting plate is that two ring flat-plates are formed by link of boards, it is connected with core support plate by secondary support column；Flow distribution device, connection post, connecting plate and secondary support column have collectively constituted the flow distribution structure of lower chambers, can suppress the formation of large scale eddy current in flow field, the coolant entering reactor core entrance is carried out assignment of traffic thus more uniform；The distribution effects before coolant entrance reactor core and drag losses can be regulated, to meet core flow distribution requirement by the size of discharge orifice, quantity, shape and position on flow distributing hole, assignment of traffic cover on change flow distribution baffle；Coolant can be adjusted enter the direction of flow distribution device, speed and on-way resistance situation by adjusting assignment of traffic cover and the angle of flow distribution baffle and the height of assignment of traffic cover.
The gusset of connection traffic distribution plate and assignment of traffic cover it is respectively arranged with in the both sides of flow distribution baffle.Further, by gusset, flow distribution cap is carried out structural strengthening, it is to avoid occur to loosen deformation under the impact of coolant.
The present invention compared with prior art, has such advantages as and beneficial effect:
A kind of flow distribution structure for pressurized water type reactor lower chambers of the present invention, flow distribution device is a Welding Structure, including assignment of traffic cover, flow distribution baffle, it is connected with core support plate by connecting post, assignment of traffic cover is a circular ring structure having multilamellar discharge orifice, the coolant entering lower chambers is carried out uniform assignment of traffic, flow distribution baffle is a ring-plane structure, except in addition to being connected post cooperation position, the flow distributing hole of Different Rule is had in remaining position, coolant is mixed further and distributes, connecting plate is that two ring flat-plates are formed by link of boards, it is connected with core support plate by secondary support column；Flow distribution device, connection post, connecting plate and secondary support column have collectively constituted the flow distribution structure of lower chambers, can suppress the formation of large scale eddy current in flow field, the coolant entering reactor core entrance is carried out assignment of traffic thus more uniform；The distribution effects before coolant entrance reactor core and drag losses can be regulated, to meet core flow distribution requirement by the size of discharge orifice, quantity, shape and position on flow distributing hole, assignment of traffic cover on change flow distribution baffle；Coolant can be adjusted enter the direction of flow distribution device, speed and on-way resistance situation by adjusting assignment of traffic cover and the angle of flow distribution baffle and the height of assignment of traffic cover；It is suitable for the construction of pressure vessel of the third generation, uniform coolant flow field can be formed in reactor core porch, meet the demand of presurized water reactor production status.
Accompanying drawing explanation
Fig. 1 be the present invention be arranged in pressure vessel partly cut open structural representation；
Fig. 2 is the upward view of accompanying drawing 1；
Fig. 3 is the structural representation of inventive flow distributor.
Labelling and corresponding parts title in accompanying drawing:
1 core plate, 2 connect post, 4 two support columns, 5 connecting plates, 6 acceptor of energies, 7 basis connecting plates, 8-lower head of pressure vessel, 9 assignment of traffic covers, 10 gussets, 11-flow distribution baffle, 13-pressure vessel, 14-boss, 15-flow distributing hole, 16-discharge orifice.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
nullStructural representation as shown in Figures 1 to 3，A kind of flow distribution structure for pressurized water type reactor lower chambers of the present invention，Including lower head of pressure vessel 8、Pressure vessel 13、And the boss 14 being fixed in pressure vessel 13，Boss 14 is provided with core plate 1，It is fixedly connected with connecting plate 5 by secondary support column 4 below core plate 1，Connected by acceptor of energy device 6 below connecting plate 5 and have basic connecting plate 7，Below core plate 1, by connection post 2, flow distribution device is installed，Flow distribution device is a Welding Structure，Including assignment of traffic cover 9、Flow distribution baffle 11、And gusset 10，It is connected with core support plate 1 by connecting post 2，Assignment of traffic cover 9 is a circular ring structure having multilamellar discharge orifice 16，The coolant entering lower chambers is carried out uniform assignment of traffic，Flow distribution baffle 11 is a ring-plane structure，Except in addition to being connected post 2 cooperation position，The flow distributing hole 15 of Different Rule is had in remaining position，Coolant is mixed further and distributes，Connecting plate 5 is that two ring flat-plates are formed by connecting by gusset 10，It is connected with core support plate 1 by secondary support column 4；Flow distribution device, connection post 2, connecting plate 5 and secondary support column 4 have collectively constituted the flow distribution structure of lower chambers, can suppress the formation of large scale eddy current in flow field, the coolant entering reactor core entrance is carried out assignment of traffic thus more uniform；The distribution effects before coolant entrance reactor core and drag losses can be regulated, to meet core flow distribution requirement by the size of discharge orifice 16, quantity, shape and position on flow distributing hole 15, assignment of traffic cover 9 on change flow distribution baffle 11；Coolant can be adjusted enter the direction of flow distribution device, speed and on-way resistance situation by adjusting assignment of traffic cover 9 and the angle of flow distribution baffle 11 and the height of assignment of traffic cover.
During reactor operation, reactor coolant is entered pressure vessel by pressure container inlet adapter, along the decline ring cavity between pressure vessel and hanging basket, flow downwardly to lower head of pressure vessel 8, after the mixing and distribute of flow distribution structure, enter reactor core after flowing upwardly through core support plate 1, take away the heat that reactor fuel rod produces, coolant, through upper core plate, flows out from pressure vessel outlet adapter；The coolant of lower head of pressure vessel 8 is mixed by flow distribution structure, and the flow entering reactor core is carried out uniform distribution, wherein secondary support column 4 is bolted and connecting plate 5 is fixed in core support plate 1 and prevents it from producing vibration, the Main Function of connecting plate 5 is to mix coolant, the formation of suppression eddy current, and connect post 2 and flow distribution baffle 11 is even fixed in core support plate 1 by bolt and prevents it from producing vibration, the effect of flow distribution structure mainly enters the flow of reactor core and carries out uniform distribution；The coolant being entered reactor core by flow distribution structure can maintain whole reactor core suitably and uniformly to cool down, thus ensures the properly functioning of whole reactor core.
The above, be only presently preferred embodiments of the present invention, and the present invention not does any pro forma restriction, and any simple modification that above example is made by every technical spirit according to the present invention, equivalent variations, within each falling within protection scope of the present invention.
Claims (3)
1. the flow distribution structure for pressurized water type reactor lower chambers, including lower head of pressure vessel (8), pressure vessel (13), and the boss (14) being fixed in pressure vessel (13), boss (14) is provided with core plate (1), it is fixedly connected with connecting plate (5) by secondary support column (4) in core plate (1) lower section, connecting plate (5) lower section is connected by acceptor of energy (6) basic connecting plate (7), it is characterized in that: also by connecting post (2), flow distribution device is installed in described core plate (1) lower section.
A kind of flow distribution structure for pressurized water type reactor lower chambers the most according to claim 1, it is characterized in that: described flow distribution device includes that one is positioned at connecting plate (5) top and the flow distribution baffle (11) parallel with connecting plate (5), flow distribution baffle (11) is in circular, flow distribution baffle (11) is provided with flow distributing hole (15), also include an assignment of traffic cover (9) being connected to flow distribution baffle (11) outside, assignment of traffic cover (9) is cylindrically, and it is coaxial with flow distribution baffle (11), assignment of traffic cover (9) is provided with discharge orifice (16).
A kind of flow distribution structure for pressurized water type reactor lower chambers the most according to claim 2, it is characterised in that: the gusset (10) of connection traffic distribution plate (11) and assignment of traffic cover (9) it is respectively arranged with in the both sides of flow distribution baffle (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610273539.3A CN105895171A (en) | 2016-04-28 | 2016-04-28 | Flow distributing structure for lower cavity of pressurized water reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610273539.3A CN105895171A (en) | 2016-04-28 | 2016-04-28 | Flow distributing structure for lower cavity of pressurized water reactor |
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| Publication Number | Publication Date |
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| CN105895171A true CN105895171A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610273539.3A Pending CN105895171A (en) | 2016-04-28 | 2016-04-28 | Flow distributing structure for lower cavity of pressurized water reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Citations (5)
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| CN103177782A (en) * | 2013-01-08 | 2013-06-26 | 上海核工程研究设计院 | Lower reactor internals for reactor |
| CN103871502A (en) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | Nuclear reactor lower chamber cylindrical flow distribution apparatus |
| CN103871501A (en) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | Flow distributor of nuclear reactor lower chamber |
| 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 |
| CN104637553A (en) * | 2015-01-28 | 2015-05-20 | 中科华核电技术研究院有限公司 | Flow distribution device and nuclear reactor component with same |
-
2016
- 2016-04-28 CN CN201610273539.3A patent/CN105895171A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871502A (en) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | Nuclear reactor lower chamber cylindrical flow distribution apparatus |
| CN103871501A (en) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | Flow distributor of nuclear reactor lower chamber |
| CN103177782A (en) * | 2013-01-08 | 2013-06-26 | 上海核工程研究设计院 | Lower reactor internals for reactor |
| 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 |
| CN104637553A (en) * | 2015-01-28 | 2015-05-20 | 中科华核电技术研究院有限公司 | Flow distribution device and nuclear reactor component with same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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Application publication date: 20160824 |