CN114550954A - Nuclear power station containment structure - Google Patents
Nuclear power station containment structure Download PDFInfo
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- CN114550954A CN114550954A CN202210072717.1A CN202210072717A CN114550954A CN 114550954 A CN114550954 A CN 114550954A CN 202210072717 A CN202210072717 A CN 202210072717A CN 114550954 A CN114550954 A CN 114550954A
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- containment
- inner cylinder
- gate
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/08—Vessels characterised by the material; Selection of materials for pressure vessels
- G21C13/087—Metallic vessels
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/08—Vessels characterised by the material; Selection of materials for pressure vessels
- G21C13/093—Concrete vessels
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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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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
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- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nuclear power, and particularly relates to a containment structure of a nuclear power station. The safety protection device comprises an inner-layer containment vessel and an outer-layer containment vessel (3), wherein the inner-layer containment vessel is composed of an inner shell top (1) and an inner cylinder body (2), the outer-layer containment vessel is arranged outside the inner-layer containment vessel, the inner shell top (1) is made of steel, the inner cylinder body (2) is made of prestressed reinforced concrete, and the outer-layer containment vessel (3) is made of reinforced concrete. The invention can effectively improve the pressure bearing capacity of the traditional containment structure form, reduce the design and construction difficulty, finally reduce the cost of the containment and improve the economy of the nuclear power station.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a containment structure of a nuclear power station.
Background
The containment vessel is an important item containing a nuclear steam supply system, is a last barrier for preventing radioactive substances from leaking, is also an important guarantee for resisting external natural events and artificial events to ensure a reactor, is the most important structure of the nuclear power station, and is a very important ring for ensuring the safety of the nuclear power station. Three major nuclear accidents of the three-Ri island, the Chernobeli and the Fukushima which occur historically are analyzed, wherein although the three-Ri island is subjected to core melting damage, large-scale radioactive substances are prevented from leaking out due to the containment. Therefore, the containment vessel plays an important role and contributes to the safety of the nuclear power plant. Meanwhile, the containment system is high in cost, affects the economy of the nuclear power station and is a key factor for the nuclear power station to seek the balance between the advancement and the economy.
At present, various types of containment vessels have certain research and engineering practice experiences from oblate spherical to hemispherical dome containment vessels, from three buttresses to two buttresses, from prestressed concrete containment vessels to steel containment vessels, and from single-layer containment vessels to double-layer containment vessels at home and abroad, for example, the American AP1000 type adopts an all-steel safe inner shell + shielding shell, the Russian VVER type adopts a prestressed reinforced concrete structure + shielding shell, and the Chinese ACP1000 type adopts a prestressed reinforced concrete structure + outer layer anti-aircraft striking reinforced concrete structure. In engineering practice, the containment structure combination forms have great differences in the aspects of pressure bearing capacity, construction cost, construction speed, design for resisting large airplane impact, lifting schemes of main equipment in the containment, and the like, but the containment structure combination forms generally have the problems of high construction cost and high design and construction difficulty, and influence on the economy of a nuclear power station.
Disclosure of Invention
The invention aims to construct a nuclear power station containment structure, which utilizes the characteristics of steel containment, prestressed reinforced concrete and common reinforced concrete structures and combines the design of containment structures, shell gates, prestressed stretching, containment construction and the like to realize a novel containment structure with strong bearing capacity, low construction difficulty, high speed and low manufacturing cost.
In order to achieve the purpose, the invention adopts the technical scheme that the containment structure of the nuclear power station comprises an inner containment consisting of an inner shell top and an inner cylinder and an outer containment arranged outside the inner containment, wherein the inner shell top is made of steel, the inner cylinder is made of prestressed reinforced concrete, and the outer containment is made of reinforced concrete.
Further, the bottom of the inner cylinder and the bottom of the outer containment are both arranged on a foundation slab, and the foundation slab is made of reinforced concrete.
Further, the shell with the shape of the inner shell top is arc-shaped or hemispherical, the inner shell top is arranged on the opening at the top of the inner cylinder body, and the inner shell top and the inner cylinder body are connected through embedded bolts or anchor bolts; the arc starting point position of the connection of the top of the inner shell and the inner cylinder body is determined by the requirement of the hoisting height of the inner item of the inner containment.
Further, a steel lining is annularly arranged on the inner cylinder wall of the inner cylinder body, and the upper surface of the foundation bottom plate is covered with the steel lining; and the steel lining on the inner cylinder wall of the inner cylinder body is connected with the connecting part of the top of the inner shell by welding.
Further, in the present invention,
a first gate is arranged at the center of the top of the inner shell top, a second gate is arranged at the center of the top of the outer containment shell, and the first gate and the second gate are coaxial and are used for transporting main equipment in the inner containment shell;
a third gate is arranged on one side of the inner cylinder body and is used for personnel to enter and exit, installation and transportation of small-size equipment in the shell and also used as an emergency gate; the third gate penetrates through the inner cylinder and the outer containment, and the connecting position of the third gate and the inner cylinder and the outer containment is in sealing connection.
Further, the inner shell top adopts the design of whole modularization, and the burst concatenation, the welding constitute the structure wholly, the material of first gate is steel, with the inner shell top with the first gate welds into whole.
Further, in the present invention,
a first steel bundle and a second steel bundle are arranged inside the cylinder wall of the inner cylinder body, the first steel bundle is a vertical prestressed steel bundle and is parallel to the axis of the inner cylinder body, and the second steel bundle is an annular prestressed steel bundle and is arranged in a horizontally surrounding manner;
a tensioning gallery is arranged in the foundation bottom plate, and the lower end of the first steel bundle vertically enters the tensioning gallery; the upper end of the first steel bundle extends to the connecting part of the top of the inner cylinder and the top of the inner shell, and the first steel bundle is tensioned in two directions;
and a buttress used for annular prestress tensioning and anchoring is arranged outside the outer wall of the inner cylinder body and used for anchoring the second steel strand.
Furthermore, a closed space is formed between the inner containment and the outer containment, and radioactive substances can be retained; the outer containment is set into a thin-wall shielding shell or an airplane impact resistant thick wall according to the requirements of a plant site.
The invention has the beneficial effects that:
1. the inner-layer containment structure adopts the matching of the steel inner shell top 1 and the prestressed reinforced concrete inner cylinder body 2, the steel inner shell top 1 is spliced and installed by adopting modular construction, the traditional shell top reinforced concrete pouring work can be greatly reduced, a reactor plant can be capped in advance, and the construction period of a key path is greatly shortened.
2. The prestressed reinforced concrete range is the inner cylinder body 2, the prestressed vertical steel beam (the first steel beam 8) is greatly shortened compared with the traditional containment, the prestressed friction loss is reduced by the prestressed steel beam, the prestressed transmission is smoother, meanwhile, the difficulty of the prestressed tension engineering is greatly reduced, and the pressure-bearing capacity of the containment is effectively enhanced by combining the heat conduction capacity of the steel inner shell top 1 under the accident condition.
3. The main equipment gate (the first gate 5) is arranged at the center of the top of the inner shell top 1, and the main equipment (a steam generator, a voltage stabilizer, a reactor and the like) in the shell is convenient to hoist and transport in a plant site, so that the problem of protecting items in the shell hoisted by an open top method is solved; meanwhile, the arrangement of the main equipment gate on the inner shell top 1 is simpler in structure, large-size holes in the prestressed reinforced concrete structure of the inner cylinder body 2 are avoided, and the overall structure performance and the sealing effect of the containment vessel are improved.
Drawings
FIG. 1 is a schematic diagram of a nuclear power plant containment structure according to an embodiment of the present invention;
in the figure: 1-inner shell top, 2-inner cylinder, 3-outer containment, 4-foundation bottom plate, 5-first gate, 6-second gate, 7-steel lining, 8-first steel bundle, 9-second steel bundle, 10-tensioning gallery, 11-top tensioning position, 12-enclosed space, and 13-third gate.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1, the containment structure of a nuclear power plant according to the present invention includes an inner containment formed by an inner shell top 1 and an inner cylinder 2, and an outer containment 3 disposed outside the inner containment, where the inner shell top 1 is made of steel, the inner cylinder 2 is made of prestressed reinforced concrete, and the outer containment 3 is made of reinforced concrete.
The bottom of the inner cylinder 2 and the bottom of the outer containment 3 are both arranged on a foundation bottom plate 4, and the foundation bottom plate 4 is made of cast-in-place reinforced concrete.
The shape of the inner shell top 1 is arc-shaped or hemispherical, the inner shell top 1 is arranged on the top opening of the inner cylinder body 2, and the two are connected by adopting an embedded bolt or an anchor bolt; the arc starting point position of the connection of the inner shell top 1 and the inner cylinder body 2 is determined by the requirement of the hoisting height of the inner item of the inner containment.
The inner cylinder wall of the inner cylinder body 2 is annularly provided with a steel lining 7, and the upper surface of the foundation slab 4 is covered with the steel lining 7; the steel lining 7 on the inner wall of the inner cylinder body 2 is connected with the connecting part of the inner shell top 1 by welding.
A first gate 5 is arranged at the center of the top of the inner shell top 1, a second gate 6 is arranged at the center of the top of the outer-layer containment 3, and the first gate 5 and the second gate 6 are coaxial and are used for transporting main equipment in the inner-layer containment (namely, the first gate is used as a hoisting and transporting channel for main equipment such as a steam generator, a reactor vessel and the like in the shell);
a third gate 13 is arranged on one side of the inner cylinder body 2 and is used for personnel to enter and exit, installation and transportation of small-size equipment in the shell and also used as an emergency gate; the third gate 13 penetrates through the inner cylinder 2 and the outer containment 3, and the third gate 13 is connected with the inner cylinder 2 and the outer containment 3 in a sealing manner.
The inner shell top 1 is designed in an integral module mode, the inner shell top and the first gate 5 are made of steel materials and welded with the inner shell top 1 and the first gate 5 into a whole to be hoisted and placed to an installation position.
A first steel bundle 8 and a second steel bundle 9 are arranged inside the wall of the inner cylinder body 2, the first steel bundle 8 is a vertical prestressed steel bundle and is parallel to the axis of the inner cylinder body 2, and the second steel bundle 9 is an annular prestressed steel bundle and is horizontally arranged in a surrounding manner;
a tensioning gallery 10 is arranged in the foundation bottom plate 4, and the lower end of the first steel bundle 8 vertically enters the tensioning gallery 10; the upper end of the first steel bundle 8 extends to the part where the top of the inner cylinder body 2 is connected with the top 1 of the inner shell, and the first steel bundle 8 is tensioned in two directions;
and a buttress for annular prestress tensioning and anchoring is arranged outside the outer wall of the inner cylinder body 2 and used for anchoring the second steel strand 9.
A closed space 12 is formed between the inner containment and the outer containment 3, and radioactive substances can be retained; the outer containment 3 is set into a thin-wall shielding shell or an airplane impact resistant thick wall according to the requirements of a plant site.
The device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.
Claims (8)
1. A containment structure of a nuclear power station is characterized in that: the safety protection device comprises an inner-layer containment vessel and an outer-layer containment vessel (3), wherein the inner-layer containment vessel is composed of an inner shell top (1) and an inner cylinder body (2), the outer-layer containment vessel is arranged outside the inner-layer containment vessel, the inner shell top (1) is made of steel, the inner cylinder body (2) is made of prestressed reinforced concrete, and the outer-layer containment vessel (3) is made of reinforced concrete.
2. The nuclear power plant containment structure as recited in claim 1 wherein: the bottom of the inner cylinder (2) and the bottom of the outer containment (3) are both arranged on a foundation bottom plate (4), and the foundation bottom plate (4) is made of reinforced concrete.
3. A nuclear power plant containment structure as claimed in claim 2, in which: the shell of the inner shell top (1) is arc-shaped or hemispherical, the inner shell top (1) is arranged on the top opening of the inner barrel (2), and the inner shell top are connected through embedded bolts or anchor bolts; the arc starting point position of the connection between the inner shell top (1) and the inner cylinder body (2) is determined by the requirement of the hoisting height of the inner item of the inner containment.
4. A nuclear power plant containment structure as claimed in claim 3, in which: the inner cylinder wall of the inner cylinder body (2) is annularly provided with a steel lining (7), and the upper surface of the foundation bottom plate (4) is covered with the steel lining (7); the steel lining (7) on the inner cylinder wall of the inner cylinder body (2) is connected with the connecting part of the inner shell top (1) by welding.
5. The nuclear power plant containment structure as recited in claim 4 wherein:
a first gate (5) is arranged at the top center of the inner shell top (1), a second gate (6) is arranged at the top center of the outer containment (3), and the first gate (5) and the second gate (6) are coaxial and are used for transporting main equipment in the inner containment;
a third gate (13) is arranged on one side of the inner cylinder (2) and is used for personnel to enter and exit, installation and transportation of small-size equipment in the shell and also used as an emergency gate; the third gate (13) penetrates through the inner cylinder (2) and the outer containment (3), and the third gate (13) is in sealing connection with the inner cylinder (2) and the outer containment (3) at the connection position.
6. The nuclear power plant containment structure as recited in claim 5 wherein: the inner shell top (1) is designed in an integral module mode, the structure is integrated by splicing and welding the segments, the first gate (5) is made of steel, and the inner shell top (1) and the first gate (5) are welded into a whole.
7. The nuclear power plant containment structure as recited in claim 6 wherein:
a first steel bundle (8) and a second steel bundle (9) are arranged inside the wall of the inner cylinder body (2), the first steel bundle (8) is a vertical prestressed steel bundle and is parallel to the axis of the inner cylinder body (2), and the second steel bundle (9) is an annular prestressed steel bundle and is arranged in a horizontal surrounding manner;
a tensioning gallery (10) is arranged in the foundation bottom plate (4), and the lower end of the first steel bundle (8) vertically enters the tensioning gallery (10); the upper end of the first steel bundle (8) extends to the connecting part of the top of the inner cylinder body (2) and the inner shell top (1), and the first steel bundle (8) is tensioned in two directions;
and a buttress for annular prestress tensioning and anchoring is arranged outside the outer wall of the inner cylinder (2) and is used for anchoring the second steel strand (9).
8. The nuclear power plant containment structure as recited in claim 1 wherein: a closed space (12) is formed between the inner containment vessel and the outer containment vessel (3) and can retain radioactive substances; the outer containment (3) is set into a thin-wall shielding shell or an airplane impact resistant thick wall according to the requirements of a plant site.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072717.1A CN114550954A (en) | 2022-01-21 | 2022-01-21 | Nuclear power station containment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072717.1A CN114550954A (en) | 2022-01-21 | 2022-01-21 | Nuclear power station containment structure |
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| CN114550954A true CN114550954A (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210072717.1A Pending CN114550954A (en) | 2022-01-21 | 2022-01-21 | Nuclear power station containment structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200027593A1 (en) * | 2018-07-04 | 2020-01-23 | Rolls-Royce Plc | Nuclear power plant |
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2022
- 2022-01-21 CN CN202210072717.1A patent/CN114550954A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200027593A1 (en) * | 2018-07-04 | 2020-01-23 | Rolls-Royce Plc | Nuclear power plant |
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