CN114664464A - Guiding device for reactor and reactor - Google Patents

Guiding device for reactor and reactor Download PDF

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Publication number
CN114664464A
CN114664464A CN202210192866.1A CN202210192866A CN114664464A CN 114664464 A CN114664464 A CN 114664464A CN 202210192866 A CN202210192866 A CN 202210192866A CN 114664464 A CN114664464 A CN 114664464A
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CN
China
Prior art keywords
reactor
back plate
dvi
flow guide
guide
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
CN202210192866.1A
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Chinese (zh)
Inventor
石琳
陈秋英
冉小兵
李跃忠
刘言午
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
CGN Power Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Original Assignee
China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
CGN Power Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by China General Nuclear Power Corp, China Nuclear Power Engineering Co Ltd, CGN Power Co Ltd, Shenzhen China Guangdong Nuclear Engineering Design Co Ltd filed Critical China General Nuclear Power Corp
Priority to CN202210192866.1A priority Critical patent/CN114664464A/en
Publication of CN114664464A publication Critical patent/CN114664464A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
    • G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
    • G21C15/14—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from headers; from joints in ducts
    • 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

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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 flow guide device and a reactor, wherein the reactor flow guide device comprises a back plate attached to the outer wall surface of a hanging basket, two side plates arranged on two opposite sides of the back plate, and a top plate arranged on the other side of the back plate; the top plate is connected between the two side plates and defines an open flow guide cavity on the back plate together with the side plates; the guide cavity is provided with a first open side and a second open side, the first open side is opposite to the back plate to form a guide inlet of the guide cavity, and the guide inlet is used for being in direct communication with the DVI injection pipe; the second open side is opposite the top plate to form a flow guide outlet of the flow guide chamber. According to the reactor flow guide device, fluid is introduced through the open flow guide cavity and is guided to flow downwards to be injected into a reactor core, so that the safety injection efficiency is improved; the problem that an independent cavity is formed on the wall surface of the hanging basket is solved, and full exchange of fluid is facilitated; is favorable for reactor compatibility.

Description

Guiding device for reactor and reactor
Technical Field
The invention relates to the technical field of reactors, in particular to a reactor flow guide device and a reactor.
Background
The direct safety injection technique (DVI) for reactor is characterized by that on the reactor pressure container a nozzle is set, and under the special working conditions of design basis accident or serious accident, the safety injection water can be directly injected into the reactor pressure container through the nozzle, and does not need to pass through cold pipe section. Be different from the mode of traditional pressurized water reactor "trunk line safety injection", DVI has reduced the possibility that the safety injection water directly runs off through the trunk line breach, has improved the effective injection of safety injection water, has reduced the demand of safety injection capacity.
In order to ensure that the safety injection fluid can effectively flow to the reactor core and reduce the bypass flow under the high-temperature and high-pressure environment in the reactor, a flow guide device is usually arranged after the safety injection fluid enters the RPV. Under the normal operation condition of the reactor, the flow influence response of the flow guiding device to the coolant in the pressure vessel is as small as possible, and the influence on the pressure drop of each region of the reactor and the influence on the flow distribution of the reactor core inlet are as small as possible. Therefore, the diversion device is arranged, so that the diversion function of the injected water under the accident condition is met, and the influence on the flow field in the reactor pressure vessel under the normal condition is small as much as possible.
The existing flow guide device is fixed on a hanging basket in a pressure container in the form of an extension pipe, the extension pipe is provided with a water inlet facing a pressure container connecting pipe, a water outlet is arranged below the extension pipe, and fluid enters an extension pipe hole after being injected from the pressure container connecting pipe, flows downwards along a cavity formed by the extension pipe and the wall surface of the hanging basket and is further injected into a reactor core. The above method has the following defects: a plurality of independent chambers are formed on the wall surface of the hanging basket, fluid exchange under normal operation conditions is not facilitated, the flow state and the flow form in the chambers are complex, and a new flow phenomenon can be introduced; the structure is large, the pressure drop of an inner annular cavity of the reactor pressure vessel and the flow distribution of the reactor core inlet are greatly influenced, and the compatibility of the flow guide device and the reactor is poor.
Another type of prior art deflector is fixed to the basket within the pressure vessel by a deflector which redirects the incoming coolant down the annular space between the basket and the pressure vessel; the deflector has a protrusion on the rear side thereof so that a gap exists between the deflector and the basket. The above method has the following defects: the deflector can realize deflection, but has no drainage function and poor flow guide effect; a gap exists between the deflector and the hanging basket, and the back protrusion bears a large load under the impact of fluid, so that the deflector is easy to lose efficacy and fall off.
Disclosure of Invention
The invention aims to provide an improved reactor flow guiding device and a reactor with the same.
The technical scheme adopted by the invention for solving the technical problems is as follows: the flow guide device for the reactor is fixed on the outer wall surface of a hanging basket in a pressure container and is opposite to a DVI injection pipe; the flow guide device for the reactor comprises a back plate attached to the outer wall surface of the hanging basket, two side plates arranged on two opposite sides of the back plate, and a top plate arranged on the other side of the back plate;
the top plate is connected between the two side plates, and defines an open flow guide cavity on the back plate together with the side plates; the guide cavity is provided with a first open side and a second open side, the first open side is opposite to the back plate to form a guide inlet of the guide cavity, and the guide inlet is used for being in direct communication with the DVI injection pipe; the second open side is opposite the top plate to form a flow guide outlet of the flow guide chamber.
Preferably, the inner surface of the top plate is a slope or a cambered surface, forming a guide surface for guiding the fluid entering the guide chamber to deflect downwards.
Preferably, the thickness of the top plate gradually decreases from the end connected with the back plate to the end far away from the back plate.
Preferably, the back plate is connected to the outer wall surface of the hanging basket through a plurality of dowel pins.
Preferably, the edge of the back plate is also tightly connected to the outer wall surface of the hanging basket by welding.
Preferably, the lower end of the side plate, which is far away from the top plate, is provided with a chamfer.
The invention also provides a reactor, which comprises a pressure vessel, a hanging basket, at least one DVI injection pipe and at least one flow guide device for the reactor, wherein the flow guide device comprises a guide pipe body and a guide pipe body;
the hanging basket is arranged in the pressure container, and one end of the DVI injection pipe is inserted into the wall of the pressure container and communicated with the inner cavity of the pressure container; the reactor is fixed on the outer wall surface of the hanging basket by the flow guide device and is opposite to the DVI injection pipe.
Preferably, the first open side of the diversion chamber of the diversion device for the reactor is connected or close to the DVI injection pipe.
Preferably, in the pressure vessel, the upper edge of the first open side of the guide chamber of the reactor guide device is flush with or higher than the upper edge of the nozzle of the DVI injection pipe.
Preferably, the width of the first open side of the guide chamber of the guide device for a reactor is greater than the maximum inner diameter of the guide surface inside the nozzle of the DVI injection pipe.
Preferably, the outer wall surface of the pressure container is provided with a connecting pipe nozzle for the inlet and outlet of the coolant; the filler neck penetrates through the inner wall surface of the pressure container, an inner hole is formed in the wall of the pressure container, and the inner hole is communicated with the filler neck and an inner cavity of the pressure container;
the second open side of the flow guide chamber of the reactor flow guide device is located below the lower edge of the inner hole.
Preferably, the reactor further comprises a core disposed within the gondola.
According to the reactor flow guide device, fluid is introduced and guided to flow downwards through the open flow guide cavity formed on the reactor flow guide device so as to be injected into a reactor core, and the safety injection efficiency is improved; the problem that an independent cavity is formed on the wall surface of the hanging basket is solved, and the full exchange of fluid is facilitated; the structure is simple, the volume is small, the influence on the flow field of the inner annular cavity of the reactor pressure vessel is small during normal operation, the influence on the pressure drop coefficient in the reactor and the flow distribution of the reactor core inlet is small, and the compatibility of the reactor is facilitated.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic cross-sectional view of a reactor according to some embodiments of the invention;
FIG. 2 is a schematic diagram of the reactor flow guide device of FIG. 1 between the cradle and DVI injection tube;
FIG. 3 is a schematic cross-sectional view of the reactor deflector of FIG. 1 between the basket and DVI injector tube;
fig. 4 is a schematic cross-sectional view of the deflector on the gondola of the reactor in fig. 1.
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.
As shown in fig. 1, the reactor according to some embodiments of the present invention may include a pressure vessel 10, a gondola 20, at least one DVI injection pipe 40, at least one reactor guide device 50, and a core 30.
The pressure vessel 10 is a closed vessel, and fig. 1 shows the pressure vessel with the top cover removed. A basket 20 is arranged in the pressure vessel 10, the basket 20 being connected with its top to the upper end in the pressure vessel 10 in particular, so that the basket 20 is suspended in its entirety in the pressure vessel 10. The core 30 is disposed within the gondola 20. The arrangement of the gondola 20 and the core 30 in the pressure vessel 10 can be implemented with reference to the prior art and will not be described herein.
The DVI injection pipe 40 is used as an injection pipe for installing water, one end of the DVI injection pipe is inserted on the wall of the pressure vessel 10 and communicated with the inner cavity of the pressure vessel 10, and the other end of the DVI injection pipe 40 is positioned outside the pressure vessel 10, so that the water is injected into the pressure vessel 10 through the DVI injection pipe 40.
The reactor flow guiding device 50 is fixed on the outer wall surface of the hanging basket 20 and is opposite to and communicated with the DVI injection pipe 40, so that the safety injection water passing through the DVI injection pipe 40 enters the reactor flow guiding device 50, flows downwards under the flow guiding effect of the reactor flow guiding device 50, then upwards enters the hanging basket 20 from the inner bottom of the pressure vessel 10, and the flow direction of the safety injection water is shown as an arrow in figure 1.
One or more DVI injection tubes 40 may be inserted into the wall of the pressure vessel 10 along the circumference of the wall. The DVI inlet pipes 40 may be uniformly or non-uniformly spaced apart, and the DVI inlet pipes 40 may be at the same height or different heights on the pressure vessel 10. In the pressure vessel 10, one or more reactor guiding devices 50 are arranged on the outer wall surface of the hanging basket 20, the reactor guiding devices 50 are arranged corresponding to the DVI injection pipe 40, and one reactor guiding device 50 is in direct communication with one DVI injection pipe 40.
Corresponding to the insertion of the DVI injection pipe 40, the wall of the pressure vessel 10 is provided with a connecting hole (not labeled) penetrating through the inner wall surface and the outer wall surface thereof, the DVI injection pipe 40 is matched with the outer peripheral surface of one end in the connecting hole and is tightly matched with the inner surface of the connecting hole, and the DVI injection pipe 40 is inserted and connected on the pressure vessel 10 in a sealing way.
The outer wall surface of the pressure vessel 10 is further provided with filler nozzles 70 for the coolant to enter and exit, respectively, and the filler nozzles 70 are distributed at intervals along the circumferential direction on the outer wall surface of the pressure vessel 10. Typically, the filler neck 70 is disposed at the upper end of the pressure vessel 10. The filler neck 70 penetrates the inner wall surface of the pressure vessel 10, and an inner hole 71 is formed in the wall of the pressure vessel 10, and the inner hole 71 communicates the filler neck 70 with the inner cavity of the pressure vessel 10. The end of the bore 71 adjacent the interior chamber of the pressure vessel 10 is also typically provided with a beveled or curved guide surface therein.
Referring to fig. 1 to 3, the reactor baffle device 50 includes a back plate 51, two side plates 52, and a top plate 53. Two side plates 52 are disposed on opposite sides of the back plate 51, and a top plate 53 is disposed on the other side of the back plate 51 and connected between the two side plates 52, so that the top plate 53 and the side plates 52 define an open guide chamber 500 on the back plate 51.
In the pressure vessel 10, the reactor flow guide device 50 is fixed to the outer wall surface of the gondola 20 with its top plate 53 facing upward and its back plate 51 facing and abutting, and the flow guide chamber 500 is opposite to the gondola 20 and communicates with the DVI inlet pipe 40. The two side plates 52 may form left and right side walls of the guide chamber 500, and the top plate 53 forms a top wall of the guide chamber 500.
For an open flow-conducting chamber 500, it has two open sides, a first open side 501 and a second open side 502, respectively. The first open side 501 is located between the ends of the two side plates 52 away from the back plate 51 and opposite the back plate 51, forming a flow guide inlet of the flow guide chamber 500 for facing communication with the DVI inlet tube 40. The second open side 502 is located between the lower ends of the two side plates 52 and opposite the top plate 53, forming a flow guide outlet of the flow guide chamber 500. The safety injection water that the DVI injection pipe 40 has received enters the guide chamber 500 through the first open side 501 and then flows downward from the second open side 502.
The open arrangement of the diversion chamber 500 makes the diversion chamber 500 communicate with the inner cavity of the pressure vessel 10, so that an independent chamber is not formed on the outer wall surface of the hanging basket 20, and sufficient exchange of fluid in the pressure vessel 10 is facilitated.
In the pressure vessel 10, the upper edge of the first open side 501 of the diversion chamber 500 is flush with the upper edge of the nozzle of the DVI injection pipe 40 (towards one end in the pressure vessel 10), or higher than the upper edge of the nozzle of the DVI injection pipe 40 (towards one end in the pressure vessel 10), so that the safety injection water output by the DVI injection pipe 40 can completely enter the diversion chamber 500, and partial safety injection water is prevented from flowing out from the upper edge of the first open side 501.
The nozzle inside of the DVI injection pipe 40 at the end inside the pressure vessel 10 is usually provided with a guide surface (inclined surface or arc surface), for which the width of the first open side 501 of the guide cavity 500 is set to be larger than the maximum inner diameter of the guide surface inside the nozzle of the DVI injection pipe 40, so that the installation water output by the DVI injection pipe 40 can completely enter the guide cavity 500 and flow inside the guide cavity 500.
Further, the width of the first open side 501 is greater than the maximum inner diameter of the guide surface 41 of the DVI injection pipe 40, and is preferably smaller than the outer diameter of the end of the DVI injection pipe 40 located in the pressure vessel 10, and is further preferably smaller than the outer diameter of the chamfer 42 (inclined surface or arc surface) on the periphery of the end, so that not only is the effective injection of the fluid ensured, but also the gap leakage flow can be reduced, the excessive arrangement of the first open side 501 is avoided, the overall volume of the reactor flow guiding device 50 is increased, the flow guiding device 50 for the whole reactor is ensured to have smaller volume while guiding the flow in the pressure vessel 10, and the influence on the flow field of the inner annular cavity of the reactor pressure vessel and on the pressure drop coefficient and the reactor core inlet flow distribution is reduced.
Further, the length of the entire reactor flow guide device 50 is substantially determined by the length of the back plate 51. Therefore, to ensure that the entire reactor flow guiding device 50 has a relatively small volume in the pressure vessel 10, the length of the reactor flow guiding device 50 (i.e. the length of the back plate 51 and the side plate 52) is set to be greater than the maximum inner diameter of the nozzle inner guiding surface 41 of the DVI injection pipe 40 located in the pressure vessel 10, and further greater than the inner diameter of the inner hole 71 of the pressure vessel 10 (preferably greater than the inner diameter of the inner guiding surface of the inner hole 71), so as to facilitate the fluid injection efficiency and avoid or reduce the outflow from the nozzle 70.
Wherein, in combination with the position relationship between the reactor flow guiding device 50 and the filler neck 70 on the pressure vessel 10 inside the pressure vessel 10, the top edge (i.e. the top plate 53) of the reactor flow guiding device 50 can be flush with the upper edge of the inner hole 71 on the pressure vessel 10 or lower than the upper edge of the inner hole 71 on the pressure vessel 10; the bottom edge (i.e., the second open side 502) of the reactor baffle device 50 is lower than the lower edge of the internal bore 71 in the pressure vessel 10.
When the top edge of the reactor flow guiding device 50 is flush with the upper edge of the inner hole 71 of the pressure vessel 10, the length of the back plate 51 and the side plate 52 should be larger than the diameter of the inner hole 71, so that the second open side 502 of the reactor flow guiding device 50 is located below the lower edge of the inner hole 71, thereby preventing the fluid guided by the reactor flow guiding device 50 from flowing to the nozzle 70.
When the top edge of the reactor flow guide device 50 is lower than the upper edge of the inner hole 71 of the filler neck 70 penetrating the pressure vessel 10, the lengths of the back plate 51 and the side plate 52 are set according to the position of the lower edge of the inner hole 71, so that the lower edges of the back plate 51 and the side plate 52 are located below the lower edge of the inner hole 71, and the second open side 502 of the reactor flow guide device 50 is located below the lower edge of the inner hole 71, thereby preventing the fluid guided by the reactor flow guide device 50 from flowing to the filler neck 70.
The first open side 501 of the diversion chamber 500 can be connected with the DVI injection pipe 40 (pipe end), so that the generation of gaps between the two is reduced, the problem of gap leakage is further reduced, and the safety injection efficiency is improved.
Or, on the premise of satisfying the installation and hoisting clearance, the first open side 501 of the diversion chamber 500 is close to the end of the DVI injection pipe 40 facing thereto, so that the gap between the two is as small as possible, thereby reducing gap leakage and improving safety injection efficiency. Wherein, the minimum value of the gap is based on the installation of the reactor flow guiding device 50 on the hanging basket 20 and the lifting of the hanging basket 20; the maximum value of the gap is based on preventing gap leakage and ensuring safety injection efficiency.
Specifically, for the fixed installation of the reactor deflector 50 on the nacelle 20, the back plate 51 may be connected to the outer wall surface of the nacelle 20 by bolts or dowels 60. Preferably, the back plate 51 is connected to the outer wall surface of the basket 20 by a plurality of dowels 60, and the back plate 51 is tightly attached to the basket 20 by fastening the dowels 60, thereby reducing the risk of the fasteners such as bolts coming off due to fatigue. The dowel pins 60 are embedded between the basket 20 and the back plate 51, and do not protrude out of the outer wall surface of the basket 20 or the back plate 51, and do not affect the flow direction of the fluid in the pressure vessel 10.
The edge of the back plate 51 may further be tightly connected to the outer wall surface of the basket 20 by welding, so that a welding seam 61 is formed between the edge of the back plate 51 and the outer wall surface of the basket 20, thereby enhancing the connection stability of the entire reactor deflector 50 to the basket 20. The welding may be continuous welding or intermittent welding, and a continuous weld 61 or an intermittent weld 61 is formed correspondingly.
The side plate 52 and the top plate 53 may be integrally formed on the back plate 51 by pressing or the like. Alternatively, the back plate 51, the side plate 52, and the top plate 53 are separately prepared, and the side plate 52 and the top plate 53 are integrally connected to the back plate 51 by welding or the like.
In order to meet the use requirements of materials in the reactor, the back plate 51, the side plate 52, the top plate 53 and other parts of the reactor flow guide device 50 are made of stainless steel or alloy materials, and carbon steel is not suitable. In terms of thickness, the back plate 51, the side plate 52 and the top plate 53 are also arranged in order to meet the structural strength requirement; under the condition of meeting the requirements, the thickness does not need to be excessively large, so that the supporting burden and the cost are avoided.
As shown in fig. 2-4, in some embodiments, two side plates 52 are attached to opposite sides of the back plate 51 opposite to and perpendicular to the back plate 51, and a top plate 53 is attached between the back plate 51 and the side plates 52 opposite to and perpendicular to the back plate 51 and the side plates 52. The diversion chamber 500 defined by the top plate 53 and the side plate 52 on the back plate 51 is a chamber with the same width.
In other embodiments, the two side plates 52 may also be inclined toward each other to form an included angle (not 90 °) with the back plate 51, provided that the flow guiding is satisfied. With the side plates 52 disposed obliquely, the width of the first open side 501 formed between the two side plates 52 is also larger than the inner diameter of the DVI injection tube 40.
In the guide chamber 500, the inner surface of the ceiling 53 also forms the inner wall surface of the guide chamber 500. The inner surface of the top plate 53 is a sloped surface (i.e., an inclined plane) or a curved surface, thereby forming a guide surface 531. The guide surface 531 is opposite to the DVI injection pipe 40, so as to be opposite to the fluid injection direction, thereby playing a role of deflecting and guiding the fluid entering the guide cavity 500 to flow downwards in a deflecting way, and avoiding the fluid from reversely flowing out of the DVI injection pipe 40.
In the embodiment shown in fig. 3, the flow guide surface 531 is formed by a curved surface; in other embodiments, the flow guide surface 531 may be formed by a bevel. The flow guide surface 531 in the top plate 53 is provided such that the thickness of the top plate 53 gradually decreases from the end connected to the back plate 51 to the end distant from the back plate 51.
The guide surfaces 531 are integrally formed on the top plate 53, so that an additional deflector is not required, the problem that the deflector falls off is solved, and the safety of the reactor is improved.
In combination with the structural composition of the reactor flow guiding device 50, in some embodiments, the side plate 52 has a polygonal shape such as a rectangle, and for the shape of the side plate, the lower end of the side plate 52 away from the top plate 53 is provided with a chamfer 521. When the reactor flow guide device 50 and the hanging basket 20 are integrally introduced into the reactor, the chamfer 521 can provide guidance, so that the hoisting difficulty is effectively reduced, and the collision is reduced.
In other embodiments, when the lower end of the side plate 52, which is far away from the top plate 53, is arc-shaped or inclined, a chamfer is not required to be arranged, and similarly, guidance can be provided when the diversion device 50 for the reactor and the hanging basket 20 are integrally introduced into the reactor, so that the hoisting difficulty is reduced, and the occurrence of collision is reduced.
When the reactor flow guide device 50 is used in a reactor, under special working conditions such as design basis accidents or serious accidents, the safety injection water is directly injected into the pressure vessel 10 through the DVI injection pipe 40. The safety injection water entering the pressure vessel 10 directly enters the guide chamber 500 opposite to the DVI injection pipe 40. The water is introduced into the guide cavity 500 from the first open side 501 of the guide cavity 500, flows downward in the guide cavity 500 under the deflection of the guide surface 531, flows out of the second open side 502 of the guide cavity 500, can flow along the nacelle 20 to the lower end of the pressure vessel 10, and is finally injected into the core 30 from the bottom of the nacelle 20.
Under the normal operation condition of the reactor, the arrangement of the reactor flow guiding device 50 in the pressure vessel 10, in combination with the simple structure, small volume and the like, has small influence on the flow of the coolant in the pressure vessel 10, and has small influence on the pressure drop of each region of the reactor and the flow distribution of the reactor core inlet.
In conclusion, the reactor diversion device 50 provided by the invention not only meets the diversion function of injected water under accident conditions, but also has little influence on the flow field in the reactor pressure vessel under normal conditions, and is beneficial to reactor compatibility.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (12)

1. A flow guide device for a reactor is characterized in that the flow guide device is fixed on the outer wall surface of a hanging basket in a pressure container and is opposite to a DVI injection pipe; the flow guide device for the reactor comprises a back plate attached to the outer wall surface of the hanging basket, two side plates arranged on two opposite sides of the back plate, and a top plate arranged on the other side of the back plate;
the top plate is connected between the two side plates, and defines an open flow guide cavity on the back plate together with the side plates; the guide cavity is provided with a first open side and a second open side, the first open side is opposite to the back plate to form a guide inlet of the guide cavity, and the guide inlet is used for being in direct communication with the DVI injection pipe; the second open side is opposite the top plate to form a flow guide outlet of the flow guide chamber.
2. The reactor baffle device of claim 1 wherein the inner surface of the top plate is beveled or curved to form a downwardly deflecting baffle surface for directing fluid entering the baffle chamber.
3. The reactor baffle device of claim 2 wherein the thickness of the top plate decreases from the end connected to the back plate to the end remote from the back plate.
4. The reactor deflector of claim 1, wherein the back plate is connected to the outer wall surface of the basket by a plurality of dowels.
5. The reactor deflector of claim 4, wherein the edge of the back plate is further welded to the outer wall surface of the basket.
6. The flow guide device for a reactor according to any one of claims 1 to 5, wherein the lower end of the side plate, which is far away from the top plate, is provided with a chamfer.
7. A reactor, characterized in that it comprises a pressure vessel, a gondola, at least one DVI injection pipe and at least one reactor deflector device according to any of claims 1-6;
the hanging basket is arranged in the pressure container, and one end of the DVI injection pipe is inserted into the wall of the pressure container and communicated with the inner cavity of the pressure container; the reactor is fixed on the outer wall surface of the hanging basket by the flow guide device and is opposite to the DVI injection pipe.
8. The reactor of claim 7, wherein the first open side of the guide chamber of the reactor guide device is adjacent to the DVI injection tube.
9. The reactor of claim 7, wherein the upper edge of the first open side of the guide chamber of the reactor guide device is flush with or higher than the upper edge of the nozzle of the DVI injection tube inside the pressure vessel.
10. The reactor of claim 7, wherein the width of the first open side of the guide chamber of the reactor guide device is greater than the maximum inner diameter of the guide surface inside the nozzle of the DVI injection pipe.
11. The reactor of claim 7, wherein the outer wall surface of the pressure vessel is provided with a filler neck for the ingress and egress of coolant; the filler neck penetrates through the inner wall surface of the pressure container, an inner hole is formed in the wall of the pressure container, and the inner hole is communicated with the filler neck and an inner cavity of the pressure container;
the second open side of the flow guide chamber of the reactor flow guide device is located below the lower edge of the inner hole.
12. The reactor of any one of claims 7-11, further comprising a core disposed within the basket.
CN202210192866.1A 2022-02-28 2022-02-28 Guiding device for reactor and reactor Pending CN114664464A (en)

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Application Number Priority Date Filing Date Title
CN202210192866.1A CN114664464A (en) 2022-02-28 2022-02-28 Guiding device for reactor and reactor

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040082224A (en) * 2003-03-18 2004-09-24 한국원자력연구소 Pressurized light water reactor having passive extension duct for direct vessel injection
KR20040082223A (en) * 2003-03-18 2004-09-24 한국원자력연구소 Pressurized light water reactor having bidirectional horizontal emergency core coolant splitter
JP2009175109A (en) * 2008-01-21 2009-08-06 Korea Atom Energ Res Inst Device and method for directly injecting emergency core cooling water into reactor vessel
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
KR101209180B1 (en) * 2011-08-18 2012-12-06 한국수력원자력 주식회사 Reactor vessel for minimizing ecc bypass
CN104008781A (en) * 2014-05-21 2014-08-27 中科华核电技术研究院有限公司 Side-stream-prevention direct safely injecting flow guide element as well as direct safely injecting device
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

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040082224A (en) * 2003-03-18 2004-09-24 한국원자력연구소 Pressurized light water reactor having passive extension duct for direct vessel injection
KR20040082223A (en) * 2003-03-18 2004-09-24 한국원자력연구소 Pressurized light water reactor having bidirectional horizontal emergency core coolant splitter
JP2009175109A (en) * 2008-01-21 2009-08-06 Korea Atom Energ Res Inst Device and method for directly injecting emergency core cooling water into reactor vessel
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
KR101209180B1 (en) * 2011-08-18 2012-12-06 한국수력원자력 주식회사 Reactor vessel for minimizing ecc bypass
CN104008781A (en) * 2014-05-21 2014-08-27 中科华核电技术研究院有限公司 Side-stream-prevention direct safely injecting flow guide element as well as direct safely injecting device
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

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