CN113012829A - Reactor and water injection flow guide device thereof - Google Patents
Reactor and water injection flow guide device thereof Download PDFInfo
- Publication number
- CN113012829A CN113012829A CN202110201132.0A CN202110201132A CN113012829A CN 113012829 A CN113012829 A CN 113012829A CN 202110201132 A CN202110201132 A CN 202110201132A CN 113012829 A CN113012829 A CN 113012829A
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- hole
- water injection
- panel
- flow guide
- reactor
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000002347 injection Methods 0.000 title claims abstract description 60
- 239000007924 injection Substances 0.000 title claims abstract description 60
- 239000000498 cooling water Substances 0.000 claims abstract description 55
- 230000035939 shock Effects 0.000 abstract description 6
- 239000002826 coolant Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
-
- 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
-
- 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
- G21C15/14—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from headers; from joints in ducts
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention discloses a reactor and a water injection flow guide device thereof, wherein the water injection flow guide device comprises a first panel, a second panel and a side plate, and a flow guide space with at least one open side is formed by the first panel, the second panel and the side plate in a surrounding manner; the water injection flow guide device is provided with at least one first through hole used for enabling cooling water to enter the flow guide space and at least one second through hole used for enabling the cooling water to leave the flow guide space, the second through hole is close to the open side of the flow guide space, the cooling water passes through the first through hole enters the flow guide space, passes through the open side and the second through hole leaves the flow guide space. According to the invention, through the arrangement of the diversion space and the first through hole and the second through hole, the bypass flow share of the cooling water is reduced, and meanwhile, the low-temperature cooling water is fully mixed with the high-temperature water outside the water injection diversion device, so that the thermal shock of the low-temperature cooling water to the reactor structure is relieved, and the safety coefficient of the reactor is improved.
Description
Technical Field
The invention relates to the technical field of nuclear reactor safety devices, in particular to a reactor and a water injection flow guide device thereof.
Background
When the nuclear reactor normally works, the coolant flows into the annular cavity through the cold pipe section, then flows through the reactor core for heating, and flows out of the hot pipe section. When a cold pipe section is broken in the nuclear power station, the coolant is lost through the broken opening to cause overheating of a reactor core, and the safety of the nuclear power station is threatened. In order to solve the above problems, it is necessary to provide a core safety injection system, and some existing reactors connect the core safety injection system to a pressure vessel, reduce the temperature of the core in the pressure vessel by injecting low-temperature cooling water into the pressure vessel, and provide a flow guide device on the outer surface of a core barrel to reduce the bypass flow of the cooling water. However, when cooling water is injected through the conventional reactor core safety water injection system, the low-temperature cooling water can generate direct thermal shock on a high-temperature reactor structure, so that potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the technical problem of providing a reactor and a water injection flow guide device thereof aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the water injection flow guide device of the reactor comprises a first panel, a second panel and a side plate, wherein the first panel, the second panel and the side plate are surrounded to form a flow guide space with at least one open side;
the water injection flow guide device is provided with at least one first through hole used for enabling cooling water to enter the flow guide space and at least one second through hole used for enabling the cooling water to leave the flow guide space, the second through hole is close to the open side of the flow guide space, the cooling water passes through the first through hole enters the flow guide space, passes through the open side and the second through hole leaves the flow guide space.
Preferably, the first through hole and the second through hole are both arranged on the first panel, and the first through hole is a round hole.
Preferably, the second through holes are round holes, and a plurality of the second through holes are arranged at intervals along the flowing direction of the cooling water in the water injection flow guide device.
Preferably, the second through hole is a long hole, one end of the long hole is communicated with the open side, and the length direction of the long hole is consistent with the flowing direction of the cooling water in the water injection flow guide device.
Preferably, a width of an end of the long hole away from the open side is smaller than a width of an end of the long hole communicating with the open side.
Preferably, the first panel and the second panel are arranged in parallel, and the first through holes and the second through holes are arranged in a direction perpendicular to a plane where the open side is located.
Preferably, the side plate is further provided with at least one exhaust hole, and the at least one exhaust hole is arranged opposite to the opening side.
The invention also discloses a reactor, which comprises the water injection flow guide device, a pressure vessel, a cold pipe section and a hot pipe section which are communicated with the pressure vessel, a connecting pipe for injecting cooling water into the water injection flow guide device, a reactor core hanging basket arranged in the pressure vessel and a reactor core arranged in the reactor core hanging basket, wherein the water injection flow guide device is arranged on one side of the reactor core hanging basket, which is far away from the reactor core, at intervals, and the connecting pipe is arranged corresponding to the first through hole.
Preferably, the inner diameter of the adapter tube is smaller than the diameter of the first through hole, and the adapter tube and the first through hole are coaxially arranged.
Preferably, the edge of the first panel or the second panel is provided with a connection region fixedly connected with the core barrel, and the water injection flow guide device and the core barrel are arranged at intervals and fixedly connected with each other through the connection region.
Preferably, the top of the second through hole is disposed higher than the active segment of the core; and/or the presence of a gas in the gas,
the top of the second through hole is lower than the cold pipe section.
Preferably, the plane of the open side is parallel to the horizontal plane of the reactor, and the first through holes and the second through holes are arranged in a direction perpendicular to the horizontal plane.
The invention has the following beneficial effects: through the setting of water conservancy diversion space and first through-hole and second through-hole, when reducing the cooling water bypass flow share for low-temperature cooling water and the outside high-temperature water intensive mixing of water injection guiding device, thereby slow down the thermal shock of low-temperature cooling water to the reactor structure, improve the factor of safety of reactor.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural view of an embodiment of a water injection guiding device of the present invention
FIG. 2 is a schematic structural view of another embodiment of the water injection guide device of the present invention;
FIG. 3 is a schematic diagram of the structure of one embodiment of a reactor of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The water injection flow guide device of the reactor can be used for guiding the cooling water when the cooling water is supplemented into the pressure container 20 in time after the reactor is broken, so that the cooling water is prevented from being splashed to the periphery, and the bypass flow share of the cooling water can be effectively reduced. Specifically, referring to fig. 1 and 2, the water injection guiding device provided by the present invention may include a first panel 11, a second panel 12, and a side plate 13, wherein the first panel 11, the second panel 12, and the side plate 13 enclose a guiding space with at least one open side 14, so as to provide a guide for the flow of cooling water and prevent the cooling water from splashing around.
Specifically, in some embodiments, at least one first through hole 15 for allowing cooling water to enter the diversion space and at least one second through hole 16 for allowing cooling water to leave the diversion space are formed in the water injection diversion device, wherein the second through hole 16 is disposed near the open side 14 of the diversion space, so that the cooling water can enter the diversion space through the first through hole 15, leave the diversion space from the second through hole 16 and the open side 14 after being guided by the diversion space, provide definite guidance for the flow of the cooling water through the first through hole 15 and the second through hole 16, and simultaneously, the low-temperature cooling water and the high-temperature water outside the water injection diversion device are sufficiently mixed by disposing the second through hole 16, thereby alleviating thermal shock of the low-temperature cooling water to the reactor structure.
Further, in some embodiments, the first panel 11 is a front panel, and the second panel 12 is a back panel, wherein the first panel 11 and the second panel 12 may be a plane or a curved surface, which is not limited herein. In this embodiment, the first through hole 15 and the second through hole 16 are both disposed on the first panel 11, and one first through hole 15 and one or more second through holes 16 are disposed on the first panel 11. In some embodiments, the first through hole 15 may be a circular hole, and certainly, the first through hole 15 serving as an inlet of the cooling water may also have other shapes, which is not described herein. The second through holes 16 may be circular holes in some embodiments, and a plurality of circular holes may be linearly arranged at intervals along the flow direction of the cooling water in the water injection flow guide device; in other embodiments, the second through hole 16 may also be a long hole, and the extending direction of the long hole is preferably consistent with the flowing direction of the cooling water in the water injection flow guiding device. In some embodiments, one end of the slot is disposed in communication with the open side 14. Further, in some embodiments, referring to fig. 2, the width of the slot may remain constant along the extension direction of the slot; in other embodiments, referring to fig. 1, the end of the long hole away from the open side 14 has a smaller width than the end of the long hole communicating with the open side 14, and as an embodiment of the present invention, the long hole is divergent, that is, the long hole gradually increases in width from the end of the long hole away from the open side 14 along the extending direction of the long hole until communicating with the open side 14. Further, in some embodiments, the arrangement direction of the first through holes 15 and the second through holes 16 is perpendicular to the plane of the open side 14, that is, the flow direction of the water flow is perpendicular to the plane of the open side 14.
In some embodiments, the first panel 11 and the second panel 12 may be disposed in parallel, and the side panel 13 may be a curved surface connected between the first panel 11 and the second panel 12 to serve as a side wall of the guide space. Preferably, the side plates 13 are arranged around the three-directional side surfaces of the diversion space, and only one side is left as an open side 14 for cooling water to flow out of the water injection diversion device, so that the diversion space is formed, and the bypass flow share of the cooling water is reduced. In the present invention, the first panel 11, the second panel 12 and the side panel 13 may be fixed by welding, or may be integrally formed, and any conventional connection method that ensures that cooling water does not leak from the joint of the three may be considered to fall within the scope of the present invention.
In some embodiments, referring further to fig. 1, the side plate 13 is further provided with an exhaust hole 17, and the exhaust hole 17 can effectively prevent the gas volume in the reactor from accumulating in the water injection diversion device and causing potential threat to the reactor. Further, the number of the exhaust holes 17 may be one or more, and a plurality of the exhaust holes 17 may be arranged at intervals on the side plate 13, and in some embodiments, at least one exhaust hole 17 is disposed opposite to the open side 14, so that the gas may be discharged out of the water injection flow guiding device in a direction away from the flow direction of the cooling water.
The invention also provides a reactor, referring to fig. 3, comprising the water injection guiding device, further comprising a pressure vessel 20, a cold pipe section 21 and a hot pipe section (not shown in the figure) which are communicated with the pressure vessel 20, a connecting pipe 22 for injecting cooling water into the water injection guiding device, a reactor core basket 31 arranged in the pressure vessel 20 and a reactor core 32 arranged in the reactor core basket 31, wherein an annular cavity is formed between the reactor core basket 31 and the pressure vessel 20, the connecting pipe 22, the cold pipe section 21 and the hot pipe section all penetrate through the pressure vessel 20 and are communicated into the annular cavity, and during normal operation, coolant flows into the annular cavity through the cold pipe section 21 and flows out of the hot pipe section after being heated by the reactor core 32.
In the present invention, the water injection guiding device is fixed on one side of the core barrel 31 away from the core 32, and the first through hole 15 is arranged corresponding to the connection pipe 22, so that the cooling water can be directly injected into the first through hole 15 through the connection pipe 22 and enter the water injection guiding device through the first through hole 15. As an embodiment of the present invention, the inner diameter of the connection pipe 22 is smaller than the diameter of the first through hole 15, and the connection pipe 22 is coaxially disposed with the first through hole 15, so as to ensure that most of the cooling water can enter the water injection flow guiding device, and reduce the ineffective water injection amount.
In some embodiments, the water injection flow guiding device is fixedly connected with the core barrel 31 through the first panel 11 or the second panel 12, wherein a connection region 18 is further provided at one side of the water injection flow guiding device fixedly connected with the core barrel 31, and the water injection flow guiding device is fixedly connected with the core barrel 31 through the connection region 18. Further, water injection guiding device and reactor core hanging flower basket 31 interval set up to through joining region 18 and reactor core hanging flower basket 31 fixed connection, specifically can be spiro union, joint or other current connected mode, thereby avoid low-temperature cooling water direct impact reactor core hanging flower basket 31, slow down the thermal shock of low-temperature cooling water to reactor core hanging flower basket 31. As an embodiment of the invention, the first panel 11 is a front plate, the second panel 12 is a back plate, the water injection guiding device is fixedly connected with the core barrel 31 through the second panel 12, the edge of the second panel 12 is a connection region 18, the connection region 18 is provided with a plurality of through holes, screws penetrate through the through holes to fixedly screw the second panel 12 with the core barrel 31, and meanwhile, a gap exists between the rest part of the second panel 12 and the core barrel 31, thereby preventing low-temperature cooling water from directly impacting the core barrel 31. Further, since the surface of the core barrel 31 is generally a curved surface, when the second panel 12 is a curved surface, the curvature of the second panel 12 may be greater than that of the core barrel 31, so as to ensure that the connection region 18 is in surface contact connection with the core barrel 31, while other regions of the second panel 12 are spaced from the surface of the core barrel 31; when the second panel 12 is a plane, the second panel 12 and the core barrel 31 can be arranged at a gap, and a connecting piece is arranged between the connecting region 18 and the core barrel 31, so that the connecting fit of the connecting region 18 and the core barrel 31 is ensured.
Furthermore, in some embodiments, the plane of the open side 14 of the water injection guiding device is parallel to the horizontal plane of the reactor, that is, the open side 14 is open in a vertical downward direction, in this case, the first through hole 15 is disposed right above the second through hole 16, the connection line between the first through hole 15 and the second through hole 16 is perpendicular to the horizontal plane of the reactor, and the cooling water flows downward under the action of gravity, so as to flow out from the second through hole 16 and the open side 14. In this embodiment, the top of the second through hole 16 is preferably arranged higher than the active section of the core 32 in the core barrel 31, so that the backflow problem under the core safety water injection pipeline breach condition can be effectively prevented; in other embodiments, the top of the second through hole 16 is disposed lower than the cold pipe section 21, so that the ineffective injection flow rate of the cooling water can be effectively reduced. In the present invention, the conditions in the two embodiments can be alternatively satisfied, or the conditions in the two embodiments can be satisfied at the same time, which is not described herein again.
According to the reactor provided by the invention, when a breach accident occurs, cooling water can be injected into the water injection flow guide device through the connecting pipe 22, the cooling water flows through the flow guide device in a guide manner and is fully mixed with external high-temperature water through the second through hole 16, so that the thermal shock of low-temperature cooling water to the reactor structure is relieved, and the safety coefficient of the reactor is improved.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. The water injection flow guide device of the reactor is characterized by comprising a first panel (11), a second panel (12) and a side plate (13), wherein the first panel (11), the second panel (12) and the side plate (13) enclose a flow guide space provided with at least one open side (14);
be equipped with at least one on the water injection guiding device and be used for making cooling water get into first through-hole (15) in water conservancy diversion space, and at least one makes cooling water leaves second through-hole (16) in water conservancy diversion space, second through-hole (16) are close to open side (14) setting in water conservancy diversion space, the cooling water warp first through-hole (15) get into the water conservancy diversion space, the warp open side (14) and second through-hole (16) leave the water conservancy diversion space.
2. The water injection guide apparatus of a reactor according to claim 1, wherein the first through hole (15) and the second through hole (16) are both provided on the first panel (11), and the first through hole (15) is a circular hole.
3. The water injection flow guide device of the reactor as claimed in claim 2, wherein the second through holes (16) are round holes, and a plurality of the second through holes (16) are arranged at intervals along the flowing direction of the cooling water in the water injection flow guide device.
4. The water injection guide device of the reactor according to claim 2, wherein the second through hole (16) is a long hole, one end of the long hole is communicated with the open side (14), and the length direction of the long hole is consistent with the flowing direction of the cooling water in the water injection guide device.
5. The water injection guide apparatus of a reactor according to claim 4, wherein the width of an end of the elongated hole away from the open side (14) is smaller than the width of an end of the elongated hole communicating with the open side (14).
6. The water injection guide apparatus of a reactor according to claim 1, wherein the first panel (11) and the second panel (12) are arranged in parallel, and the first through holes (15) and the second through holes (16) are arranged in a direction perpendicular to a plane in which the open side (14) is located.
7. The water injection guide device of the reactor as claimed in claim 1, characterized in that the side plate (13) is further provided with at least one exhaust hole (17), and the at least one exhaust hole (17) is arranged opposite to the open side (14).
8. The reactor is characterized by comprising the water injection and flow guide device as claimed in any one of claims 1 to 7, and further comprising a pressure vessel (20), a cold pipe section (21) and a hot pipe section which are communicated with the pressure vessel (20), a connecting pipe (22) for injecting cooling water into the water injection and flow guide device, a core barrel (31) arranged in the pressure vessel (20), and a core (32) arranged in the core barrel (31), wherein the water injection and flow guide device is arranged on one side of the core barrel (31) which is far away from the core (32) at intervals, and the connecting pipe (22) is arranged corresponding to the first through hole (15).
9. The reactor according to claim 8, characterized in that the internal diameter of the nozzle (22) is smaller than the diameter of the first through hole (15), the nozzle (22) and the first through hole (15) being arranged coaxially.
10. The reactor according to claim 8, characterized in that the edge of the first panel (11) or the second panel (12) is provided with a connection region (18) fixedly connected with the core barrel (31), and the water injection flow guide device is arranged at a distance from the core barrel (31) and fixedly connected with the core barrel (31) through the connection region (18).
11. The reactor according to claim 8, characterized in that the top of the second through hole (16) is arranged higher than the active section of the core (32); and/or the presence of a gas in the gas,
the top of the second through hole (16) is arranged lower than the cold pipe section (21).
12. The reactor according to claim 8, characterized in that the plane of the open side (14) is arranged parallel to the horizontal plane of the reactor, and the first through holes (15) and the second through holes (16) are arranged in a direction perpendicular to the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110201132.0A CN113012829A (en) | 2021-02-23 | 2021-02-23 | Reactor and water injection flow guide device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110201132.0A CN113012829A (en) | 2021-02-23 | 2021-02-23 | Reactor and water injection flow guide device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113012829A true CN113012829A (en) | 2021-06-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110201132.0A Pending CN113012829A (en) | 2021-02-23 | 2021-02-23 | Reactor and water injection flow guide device thereof |
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| CN (1) | CN113012829A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037795A (en) * | 1988-05-13 | 1989-12-06 | 法玛通公司 | The nuclear reactor of band emergency cooling water injecting device |
| KR20050022413A (en) * | 2003-08-30 | 2005-03-08 | 한국원자력연구소 | Emergency Core Cooling System for Pressurized Light Water Reactor |
| US20080279326A1 (en) * | 2007-05-08 | 2008-11-13 | Gilmore Charles B | Nuclear reactor downcomer flow deflector |
| KR20090080244A (en) * | 2008-01-21 | 2009-07-24 | 한국원자력연구원 | Direct Vessel Injector |
| CN101540212A (en) * | 2008-03-17 | 2009-09-23 | 韩国原子力研究院 | Emergency core cooling system having core barrel injection extension ducts |
| CN110544543A (en) * | 2019-09-12 | 2019-12-06 | 国家电投集团科学技术研究院有限公司 | safety water protection device and reactor with same |
| CN110808108A (en) * | 2019-10-16 | 2020-02-18 | 中广核工程有限公司 | Semi-open type flow guide device used under direct safety injection condition of nuclear reactor |
-
2021
- 2021-02-23 CN CN202110201132.0A patent/CN113012829A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037795A (en) * | 1988-05-13 | 1989-12-06 | 法玛通公司 | The nuclear reactor of band emergency cooling water injecting device |
| KR20050022413A (en) * | 2003-08-30 | 2005-03-08 | 한국원자력연구소 | Emergency Core Cooling System for Pressurized Light Water Reactor |
| US20080279326A1 (en) * | 2007-05-08 | 2008-11-13 | Gilmore Charles B | Nuclear reactor downcomer flow deflector |
| KR20090080244A (en) * | 2008-01-21 | 2009-07-24 | 한국원자력연구원 | Direct Vessel Injector |
| CN101540212A (en) * | 2008-03-17 | 2009-09-23 | 韩国原子力研究院 | Emergency core cooling system having core barrel injection extension ducts |
| CN110544543A (en) * | 2019-09-12 | 2019-12-06 | 国家电投集团科学技术研究院有限公司 | safety water protection device and reactor with same |
| CN110808108A (en) * | 2019-10-16 | 2020-02-18 | 中广核工程有限公司 | Semi-open type flow guide device used under direct safety injection condition of nuclear reactor |
Non-Patent Citations (1)
| Title |
|---|
| 曹方方 等: "反应堆直接安注结构热工影响分析", 原子能科学技术, vol. 51, no. 1, pages 46 - 51 * |
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