CN116072314A - Nuclear power station double-layer containment structure for passive air cooling and nuclear power station with same - Google Patents

Nuclear power station double-layer containment structure for passive air cooling and nuclear power station with same Download PDF

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Publication number
CN116072314A
CN116072314A CN202310096564.9A CN202310096564A CN116072314A CN 116072314 A CN116072314 A CN 116072314A CN 202310096564 A CN202310096564 A CN 202310096564A CN 116072314 A CN116072314 A CN 116072314A
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CN
China
Prior art keywords
containment
nuclear power
air
outer containment
power station
Prior art date
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.)
Pending
Application number
CN202310096564.9A
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Chinese (zh)
Inventor
胡珀
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Filing date
Publication date
Application filed by Shanghai Jiaotong University filed Critical Shanghai Jiaotong University
Priority to CN202310096564.9A priority Critical patent/CN116072314A/en
Publication of CN116072314A publication Critical patent/CN116072314A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C13/00—Pressure vessels; Containment vessels; Containment in general
    • G21C13/02—Details
    • G21C13/022—Ventilating arrangements
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C13/00—Pressure vessels; Containment vessels; Containment in general
    • G21C13/02—Details
    • G21C13/024—Supporting constructions for pressure vessels or containment vessels
    • 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
    • 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
    • G21C15/18—Emergency cooling arrangements; Removing shut-down heat
    • 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 provides a double-layer containment structure of a nuclear power station for passive air cooling and the nuclear power station thereof, belonging to the technical field of passive air cooling. The containment includes outer containment, the wind gap includes the air inlet, outer containment outside trompil is provided with the wind channel, set up on the wind channel the air inlet, just outer containment outside sets up the support. According to the invention, the air duct is arranged on the outer containment, and the method of opening the bottom of the outer containment is utilized to convey air flow to replace the arrangement of the flow guide coaming in the annular cavity between the inner containment and the outer containment, so that the maintenance is simple and convenient, and the inconvenience to installation and maintenance caused by narrow space is avoided. Through adopting the hard support of fixed and the outside wind channel of support outer containment, can bear the bearing and the support function of the outer containment of part, effectively solved the structural strength problem of containment body behind outer containment bottom trompil to be favorable to reforming transform current double-deck containment.

Description

Nuclear power station double-layer containment structure for passive air cooling and nuclear power station with same
Technical Field
The invention relates to the technical field of passive air cooling, in particular to a double-layer containment structure of a nuclear power station for passive air cooling and a nuclear power station thereof.
Background
Currently, in the safety technology of nuclear power plants, there is a double containment design that accommodates the primary circuit of the nuclear power plant (including the reactor core), wherein the inner containment is an airtight metal cover and the outer containment is a vented building. When a pressurized water reactor nuclear power plant reactor has a coolant loss accident or a main steam pipeline breakage accident, the water vapor content in the inner containment is rapidly increased, so that the internal pressure and the temperature are greatly increased, the metal body temperature of the inner containment is further increased, an effective natural circulation loop of air can be formed through an air inlet of an outer containment building, an annular air duct between the inner containment and the outer containment and an air outlet at the top of the outer containment, and natural circulation driving force is provided through the higher temperature of the wall surface of the inner containment, so that certain cooling capacity is provided, the temperature and the pressure in the containment are ensured to be lower than safety limit values, and the safety of a nuclear power plant and the environment is ensured.
The prior outer containment air inlet mainly adopts two technical schemes, one of which is shown in figure 3, adopts bottom air inlet, and air directly passes through the annular cavities of the inner containment and the outer containment from bottom to top after entering, and flows out from the top; the other is shown in figure 4, air is introduced from the high position of the side part of the outer containment, and a diversion coaming is arranged in the annular cavity of the inner containment to divide the annular cavity into an inner annular cavity and an outer annular cavity, and the air flowing in from the inlet flows downwards in the outer annular cavity, then flows upwards at the bottom of the annular cavity in a turning way and flows out through the upper outlet.
In the prior art, the structure is simple, but the air inlet is arranged at the lower part, the inlet wind is easily shielded by a nearby building, and the air inlet is arranged close to the base, so that the structural strength of the outer containment is required to a certain extent; the air inlet in the prior art 2 is wide and free of shielding, so that air flow at a high place close to the ground is utilized, but the structure in the annular cavity is narrow, and inconvenience is brought to maintenance and inspection of the system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a double-layer containment structure of a nuclear power station for passive air cooling and the nuclear power station thereof.
The invention provides a double-layer containment structure for a nuclear power station for passive air cooling, which comprises a containment, a tuyere and a bracket, wherein the containment is arranged on the support;
the containment includes outer containment, the wind gap includes the air inlet, outer containment outside trompil is provided with the wind channel, set up on the wind channel the air inlet, just outer containment outside sets up the support.
In some embodiments, the containment vessel further comprises an inner containment vessel disposed inside the outer containment vessel, an annular cavity being disposed between the inner containment vessel and the inner containment vessel.
In some embodiments, an air duct is arranged outside the outer containment, one end of the air duct is connected to the outer side of the outer containment, and the other end of the air duct is an air inlet.
In some embodiments, the opening at one end of the air duct is communicated with the annular cavity and is arranged at the bottom outside the outer containment, and the air inlet is arranged at the upper part outside the outer containment.
In some embodiments, the plurality of air inlets are symmetrically disposed outside the outer containment.
In some embodiments, the plurality of brackets are symmetrically disposed outside the outer containment.
In some embodiments, the tuyere further comprises an air outlet provided at the top of the outer containment.
In some embodiments, the air in the air inlet flows out of the air outlet from bottom to top through the annular cavity.
A nuclear power station adopts the nuclear power station double-layer containment structure for passive air cooling.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the air duct is arranged on the outer containment, and the method of opening the bottom of the outer containment is used for conveying air flow to replace the arrangement of the flow guide coaming in the annular cavity between the inner containment and the outer containment, so that the maintenance is simple and convenient, and inconvenience to installation and maintenance caused by space stenosis is avoided;
2. according to the invention, the air inlet is arranged at the upper part of the outer containment, so that the air inlet is wide and free from shielding, and the utilization of air flow near the high place of the ground is facilitated;
3. the invention adopts the hard bracket for fixing and supporting the external air duct of the outer containment, and the bracket can bear the bearing and supporting functions of part of the outer containment, thereby effectively solving the structural strength problem of the containment body after the bottom of the outer containment is perforated, and being beneficial to the improvement of the existing double-layer containment.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a front view of a dual containment structure of a nuclear power plant for passive air cooling of the present invention;
FIG. 2 is a top view of a dual containment structure for a passive air cooled nuclear power plant in accordance with the present invention;
fig. 3 is a front view of prior art 1 in the background;
fig. 4 is a front view of prior art 2 in the background.
Reference numerals:
inner containment 1 deflector coaming 5
Outer containment vessel 2 support 6
Air inlet 3 and air duct 7
Air outlet 4 annular cavity 8
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
As shown in fig. 1-2, the present invention includes a containment vessel, tuyere, and support 6. The containment comprises an outer containment shell 2, the air inlet comprises an air inlet 3, an air duct 7 is formed in an opening in the outer side of the outer containment shell 2, the air inlet 3 is arranged on the air duct 7, and the support 6 is arranged on the outer side of the outer containment shell 2.
The containment also comprises an inner containment 1, wherein the inner containment 1 is arranged inside the outer containment 2, and a ring cavity 8 is arranged between the inner containment 1 and the inner containment 2. The outside of the outer containment vessel 2 is provided with an air channel 7, one end of the air channel 7 is connected to the outside of the outer containment vessel 2, and the other end of the air channel 7 is an air inlet 3. One end of the air duct 7 is provided with a hole communicated with the annular cavity 8, the bottom of the outer side of the outer containment vessel 2, and the air inlet 3 is arranged on the upper part of the outer side of the outer containment vessel 2. The plurality of air inlets 3 are symmetrically arranged outside the outer containment vessel 2. A plurality of brackets 6 are symmetrically arranged outside the outer containment vessel 2. The air outlet also comprises an air outlet 4, and the air outlet 4 is arranged at the top of the outer containment vessel 2. The wind in the air inlet 3 flows out from the air outlet 4 from bottom to top through the annular cavity 8. A nuclear power station adopts the nuclear power station double-layer containment structure for passive air cooling.
The air inlet 3 is arranged above the side part of the outer containment vessel 2, and the air flows downwards from the air inlet 3 to the air outlet 4 to the bottom of the annular cavity 8 and then flows reversely from bottom to top until the air outlet 4 flows out, but unlike the design of the upper part of the air inlet 3 in fig. 4, the air inlet 3 is not provided with the diversion coaming 5 between the outer containment vessel 2 and the inner containment vessel 1, but the air duct 7 from top to bottom is moved to the outside of the outer containment vessel 2, so that the flow mode in the prior art 2 is realized, but the space in the annular cavity 8 is narrowed caused by the diversion coaming 5, and inconvenience is caused to maintenance and inspection of a system.
The air duct 7 outside the outer containment 2 can be implemented directly under the design of prior art 1 or 2, through simple modification, or independently under the new double containment design:
the air channels 7 are symmetrically arranged on the outer side surface of the outer containment vessel 2, one end of each air channel 7, namely the air inlet 3, is positioned on the upper part of the side surface, and the other end of each air channel 7 penetrates through the access annular cavity 8 at the bottom of the outer containment vessel 2. The air duct 7 is supported by a steel bracket, and the bracket 6 is connected to the outer side of the outer containment vessel 2, so that the mechanical stress performance of the containment vessel body can be improved after one end of the air duct 7 penetrates through the outer containment vessel. After the wind in the wind channel 7 gets into ring chamber 8 lower part, can adopt a large amount of modes of equipartition air outlet 4 on outer containment 2, according to expend with heat and contract with cold principle, the cold air flows downwards, and the hot air flows upwards, and the air current of ring chamber 8 lower part flows fast from air outlet 4 along ring chamber 8 axial after absorbing the heat on the containment inner wall, improves the radiating efficiency of containment body.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (9)

1. A nuclear power plant double containment structure for passive air cooling, characterized by comprising a containment, a tuyere and a bracket (6);
the safety shell comprises an outer safety shell (2), the air inlet comprises an air inlet (3), an air duct (7) is formed in an opening in the outer side of the outer safety shell (2), the air inlet (3) is formed in the air duct (7), and the support (6) is arranged in the outer side of the outer safety shell (2).
2. The nuclear power plant double containment structure for passive air cooling according to claim 1, characterized in that the containment further comprises an inner containment (1), the inner containment (1) being arranged inside the outer containment (2), an annular cavity (8) being arranged between the inner containment (1) and the inner containment (2).
3. The nuclear power plant double containment structure for passive air cooling according to claim 1, wherein the air duct (7) is arranged outside the outer containment (2), one end of the air duct (7) is connected outside the outer containment (2), and the other end of the air duct (7) is the air inlet (3).
4. A nuclear power plant double containment structure for passive air cooling according to claim 3, wherein one end of the air duct (7) is open and communicated with the annular cavity (8) and is arranged at the bottom of the outer side of the outer containment (2), and the air inlet (3) is arranged at the upper part of the outer side of the outer containment (2).
5. The nuclear power plant double containment structure for passive air cooling according to claim 1, characterized in that the plurality of air inlets (3) are symmetrically arranged outside the outer containment (2).
6. The nuclear power plant double containment structure for passive air cooling according to claim 1, characterized in that the plurality of brackets (6) are symmetrically arranged outside the outer containment (2).
7. The nuclear power plant double containment structure for passive air cooling according to claim 1, characterized in that the tuyere further comprises an air outlet (4), the air outlet (4) being arranged on top of the outer containment (2).
8. A nuclear power plant double containment structure for passive air cooling according to claim 2, characterized in that the wind in the inlet (3) flows out from the outlet (4) from bottom to top through the annular cavity (8).
9. A nuclear power plant characterized in that a double containment structure for passive air cooling as claimed in any one of claims 1-8 is employed.
CN202310096564.9A 2023-02-07 2023-02-07 Nuclear power station double-layer containment structure for passive air cooling and nuclear power station with same Pending CN116072314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310096564.9A CN116072314A (en) 2023-02-07 2023-02-07 Nuclear power station double-layer containment structure for passive air cooling and nuclear power station with same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310096564.9A CN116072314A (en) 2023-02-07 2023-02-07 Nuclear power station double-layer containment structure for passive air cooling and nuclear power station with same

Publications (1)

Publication Number Publication Date
CN116072314A true CN116072314A (en) 2023-05-05

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ID=86172951

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310096564.9A Pending CN116072314A (en) 2023-02-07 2023-02-07 Nuclear power station double-layer containment structure for passive air cooling and nuclear power station with same

Country Status (1)

Country Link
CN (1) CN116072314A (en)

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