CN113982909A - Reactor, pump support assembly and cooling system for power pump - Google Patents
Reactor, pump support assembly and cooling system for power pump Download PDFInfo
- Publication number
- CN113982909A CN113982909A CN202111229869.XA CN202111229869A CN113982909A CN 113982909 A CN113982909 A CN 113982909A CN 202111229869 A CN202111229869 A CN 202111229869A CN 113982909 A CN113982909 A CN 113982909A
- Authority
- CN
- China
- Prior art keywords
- pump
- pump support
- coolant
- cooling system
- reactor
- 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
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 39
- 239000002826 coolant Substances 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
-
- 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
Abstract
The embodiment of the application discloses a reactor, a pump supporting assembly and a cooling system of a power pump. Wherein the cooling system is mounted on a pump support supporting the power pump, the pump support being provided with an outlet for the coolant pumped by the power pump to flow out, the cooling system comprising: the inner cylinder is arranged on the radial outer side of the pump support, an inner annular gap is formed between the inner cylinder and the pump support, and the inner cylinder is provided with at least one liquid flow through hole; the outer cylinder is positioned on the radial outer side of the outer cylinder, and an outer annular gap is formed between the outer cylinder and the inner cylinder; a coolant outlet structure for introducing a portion of the coolant flowing from the pump support outlet into the inner annular gap; and a pressure reducing orifice member provided to the coolant lead-out structure for causing a part of the coolant flowing out of the pump support outlet to flow into the inner annular gap after pressure reduction. The technical scheme of this application can reduce the operating temperature of power pump in the reactor.
Description
Technical Field
The invention relates to the technical field of nuclear reactors, in particular to a reactor, a pump supporting assembly and a cooling system of a power pump.
Background
The primary cooling system of the primary loop is one of main systems in the reactor, and the coolant in the primary loop discharges heat generated in the fuel elements from the reactor core when passing through the reactor core assembly, so that the normal working condition of the reactor core is maintained, and the safe operation of the reactor is ensured. In a primary circuit primary cooling system, circulation of a primary circuit coolant is achieved by means of a power pump.
Disclosure of Invention
A first aspect of an embodiment of the present application provides a cooling system for a reactor power pump, wherein the cooling system is mounted on a pump support supporting the power pump, the pump support being provided with an outlet for flowing out a coolant pumped by the power pump, the cooling system comprising:
the inner cylinder is arranged on the radial outer side of the pump support, an inner annular gap is formed between the inner cylinder and the pump support, and the inner cylinder is provided with at least one liquid flow through hole;
the outer cylinder is positioned on the radial outer side of the outer cylinder, and an outer annular gap is formed between the outer cylinder and the inner cylinder;
a coolant outlet structure for introducing a portion of the coolant flowing from the pump support outlet into the inner annular gap; and
and a pressure reducing throttling member, which is arranged on the coolant leading-out structure and is used for reducing the pressure of part of the coolant flowing out from the pump support outlet and then flowing into the inner annular gap.
A second aspect of an embodiment of the present application provides a reactor pump support assembly comprising:
a pump support for supporting the power pump;
the cooling system according to the first aspect of the embodiment of the present application, for cooling the power pump.
A third aspect of embodiments of the present application provides a reactor comprising:
a pressure vessel body containing a coolant therein;
a pressure vessel header that forms a pressure vessel of the reactor together with the pressure vessel body;
a core assembly disposed within the pressure vessel;
a power pump for pumping coolant to the core assembly;
a pump support assembly according to the second aspect of the embodiments of the present application is secured to the pressure vessel head for supporting and cooling the power pump.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
FIG. 1 is a schematic and diagrammatic illustration of a reactor according to an embodiment of the invention;
FIG. 2 is a schematic illustration of a top cover of the pressure vessel shown in FIG. 1;
FIG. 3 is a partial cross-sectional view of a pump support assembly according to an embodiment of the present invention mounted to a top cover of a pressure vessel;
FIG. 4 is a cross-sectional view of a pump support assembly according to an embodiment of the present invention;
FIG. 5 is an enlarged fragmentary view of the pump support assembly of FIG. 4;
FIG. 6 is a partial enlarged view of area A in FIG. 5;
FIG. 7 is a cross-sectional view of the cartridge portion of FIG. 4;
FIG. 8 is a partial enlarged view of area B of FIG. 7;
FIG. 9 is a bottom view of FIG. 4; and
FIG. 10 is a partial cross-sectional view of a pump support assembly according to another embodiment of the present invention mounted to a top cover of a pressure vessel.
In the drawings:
11. a pressure vessel body; 12. a pressure vessel top cover; 121. a conical body; 1211. a central through hole; 1212. mounting and tapping; 1213. taking over a pipe; 122. a connecting portion; 20. a grid plate header; 30. a core assembly; 40. a power pump; 41. a pump support; 412. a connecting portion; 42. a cooling system; 421. an outer cylinder; 4211. an outer annular gap; 422. an inner cylinder; 4221. an inner annular gap; 423. a barrel portion; 4231. a through hole; 424. connecting a pipeline; 424A, a first connecting pipeline; 424B, a second connecting pipeline; 425. a first orifice member; 426. a second orifice member; 427. a support cylinder; 4271. a through hole; 50. a heat exchanger; 60. a cock; 70. and (4) supporting in the pile.
It should be noted that the figures are not drawn to scale and that elements of similar structure or function are generally represented by like reference numerals throughout the figures for illustrative purposes. It should also be noted that the drawings are only for the purpose of illustrating preferred embodiments and are not intended to limit the invention itself. The drawings do not show every aspect of the described embodiments and do not limit the scope of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The reactor of the embodiment of the application is a pool reactor. The coolant can be liquid sodium or liquid lead bismuth alloy, and the like, and correspondingly, the reactor is a pool type sodium-cooled fast reactor or a pool type lead bismuth fast reactor.
FIG. 1 is a schematic and schematic diagram of a reactor according to an embodiment of the invention. The direction of the arrows in the figure indicates the direction of flow of the coolant. As shown in fig. 1, the reactor may include a pressure vessel head 12 and a pressure vessel body 11. The pressure vessel body 11 may be fixedly connected to the pressure vessel top cover 12 by a fastener such as a bolt, and the two are sealed to form a pressure vessel.
The reactor also includes a cascade plate header 20, a core assembly 30, a power pump 40, and a heat exchanger 50 disposed inside the pressure vessel. The inside of the pressure vessel is provided with coolant which is pumped into the reactor core assembly 30 by the power pump 40 to cool the reactor core assembly 30; the coolant flowing out of the core assembly 30 then enters the heat exchanger 50 to be cooled. The cooled coolant is then pumped by the power pump 40 to the core assembly 30.
The grid headers 20 are provided below the core assembly 30 for fixing and supporting at least the core assembly 30 and distributing coolant flow to the core assembly 30. The coolant pumped by the power pump 40 first enters the inside of the cascade plate header 20 and then flows into the core assembly 30.
In some embodiments, an upper hot pool area and a lower cold pool area (not shown) are formed within the reactor; the coolant flowing into the core assembly 30 from the cold pool area carries the heat of the core assembly 30 into the hot pool area.
The heat exchanger 50 is used to cool the coolant from the hot well area and to flow the cooled coolant into the cold well area. The coolant flowing out of the core assembly 30 enters the hot pool area and then enters the heat exchanger 50 to be cooled, the coolant flowing out of the heat exchanger 50 enters the cold pool area and is pumped to the grid plate header 20 by the power pump 40 to cool the core assembly 30 and other equipment in the reactor, and after the coolant absorbs heat generated by the core assembly 30, the coolant is recirculated to the heat exchanger 50 to be cooled, thereby completing the circulation of the coolant in the reactor loop.
The power pump 40 may be a centrifugal pump. In other embodiments, one skilled in the art may select other types of power pumps 40 to power the coolant delivery, as appropriate.
The power pump 40 is supported by a pump support that may be secured to the pressure vessel top cover 12. The lower end of the pump support has a pump outlet through which coolant pumped by the power pump 40 flows outwardly.
In some embodiments, referring to fig. 2, the pressure vessel top cap 12 comprises: a connecting portion 122 and a tapered body 121. The connecting portion 122 is used for connecting with the pressure vessel body 11. The tapered body 121 extends obliquely upward from the connection part 122, and a central through-hole 1211 is formed at the center of the tapered body 121. The reactor tap 60 extends downwardly into the pressure vessel from the central through bore 1211.
The conical body 121 also defines a plurality of mounting apertures 1212, each mounting aperture 1212 for mounting a heat exchanger 50 or a power pump 40.
As shown in fig. 3, in order to ensure sealability inside the pressure vessel, a nipple 1213 is formed extending upward from the periphery of the mounting opening 1212. The top end of the pump support 41 is provided with a connecting part 412, and the pump support 41 is fixedly connected with the connecting pipe 1213 of the pressure vessel top cover 12 through the connecting part 412, and the pump support 41 is provided with an outlet for the coolant pumped by the power pump 40 to flow out.
The pump support 41 may have, for example, a sleeve structure whose bottom end is open as an outlet through which the coolant pumped by the power pump 40 flows.
For a reactor, the temperature of the refrigerant inside the pressure vessel is as high as 400 ℃ or higher. Since the lower middle portion of the pump support 41 is located in the coolant in the pressure vessel, in order to limit the temperature of the coolant inside the pump support 41 and maintain the normal operating temperature of the power pump 40, in the embodiment of the present application, a cooling system 42 of the power pump 40 is provided on the pump support 41 to cool the coolant inside the pump support 41 and the pump support 41.
In the present embodiment, the cooling system 42 and the pump support 41 of the power pump 40 may be collectively referred to as a pump support assembly.
FIG. 4 is a cross-sectional view of a pump support assembly according to an embodiment of the present invention; fig. 5 is an enlarged view of a portion of the pump support assembly shown in fig. 4. Referring to fig. 4 and 5, the cooling system 42 is mounted on a pump support that supports the power pump 40. The cooling system 42 includes: inner cylinder 422, outer cylinder 421 and coolant outlet structure.
The inner cylinder 422 is disposed radially outward of the pump support 41. Referring to fig. 6, an inner annular gap 4221 is formed between the inner cylinder 422 and the pump support 41, and the inner cylinder 422 is provided with at least one fluid passage hole (not shown). The liquid flow through-holes may be provided on the upper peripheral wall of the inner cylinder 422.
The outer cylinder 421 is located radially outside the outer cylinder 421. As shown in fig. 6, an outer annular gap 4211 is formed between the outer cylinder 421 and the inner cylinder 422. The flow through holes communicate the inner ring gap 4221 with the outer ring gap 4211.
It will be readily appreciated that in a reactor, the coolant pumped by the power pump 40 is cooled by the heat exchanger 50. In the pump support 41 of the cooling system 42 without the power pump 40, the coolant pumped by the power pump 40 flows out of the outlet of the pump support 41, and then generally enters the header 20 and is distributed by the header 20.
In the present embodiment, the coolant lead-out structure is specifically provided to lead part of the coolant flowing out from the outlet of the pump support 41 into the inner annular gap 4221, thereby cooling the pump support 41 with the part of the coolant.
Specifically, most of the coolant flowing out of the outlet of the pump support 41 flows into the cascade plate header 20, and part of the coolant flows into the inner annular gap 4221 and continues to flow upward in the inner annular gap 4221 to cool down the pump support 41; and the coolant entering the inner annular gap 4221 flows into the outer annular gap 4211 through the liquid flow through holes of the inner cylinder 422 and then flows downward within the outer annular gap 4211.
Coolant entering the outer annular gap 4211 may flow into the hot well region.
The cooling system 42 is provided in the embodiment of the present application, so that the operating temperature of the power pump 40 is prevented from being too high, and the power pump 40 is prevented from malfunctioning by cooling the pump support 41.
When the pump support 41 and the power pump 40 are cooled by the cooling system 42, the inventors of the present application have found that the temperature gradient in the circumferential direction of the pump support 41 is large, so that the pump support 41 has a large thermal stress in the circumferential direction.
The inventors of the present application have further found that one factor contributing to a large circumferential temperature gradient of the pump support 41 may be due to a large circumferential temperature difference caused by insufficient mixing in the circumferential direction due to an excessively high flow velocity of the coolant in the axial direction in the inner annular gap 4221.
Therefore, in a further embodiment of the present application, a pressure-reducing throttle is provided in the coolant lead-out structure for causing part of the coolant flowing out from the outlet of the pump support 41 to flow into the inner annular gap 4221 after being reduced in pressure.
By arranging the coolant leading-out structure and the pressure reduction throttling piece, the flow velocity of the coolant in the inner annular gap 4221 along the axial direction is reduced, the coolant is uniformly mixed in the circumferential direction of the inner annular gap 4221, and therefore the circumferential temperature uniformity of the pump support 41 is improved.
In some embodiments, the coolant outlet structure comprises: a body 423 and a plurality of connecting ducts 424.
The cylindrical body 423 is connected to an outlet of the pump support 41, and a plurality of through holes 4231 are provided in the circumferential direction of the cylindrical body 423. Each connecting pipe 424 connects the cylinder body 423 and the inner cylinder 422, and each connecting pipe 424 is internally formed with a flow passage 4241 communicating with one through hole 4231 and the inner annular gap 4221. Specifically, the upper end of the cylindrical body 423 is connected to the outlet of the pump support 41, and a part of the coolant entering the cylindrical body 423 flows into the flow passage 4241 through the through hole 4231, and the rest of the coolant flows downward out of the cylindrical body 423.
In some embodiments, the pump support 41 is a sleeve structure. The coolant lead-out structure is joined to the pump support 41 at the bottom of the pump support 41. Referring to fig. 6, the coolant drawing structure further includes a support cylinder 427, and the upper end of the support cylinder 427 is connected to the pump supporter 41 at the bottom of the pump supporter 41. The support cylinder 427 is provided with a through hole 4271, and the through hole 4271 communicates the connection pipe 424 with the inner annular gap 4221.
The support sleeve 427 extends downwardly at its lower end and is connected to the in-reactor support 70 in the reactor, thereby serving as a support for the pump support assembly. The outer cylinder 421 also extends downwardly to connect with an in-reactor support 70 (e.g., a support upper plate) within the reactor to further support the pump support assembly.
The pressure reducing throttle comprises a plurality of first throttles 425, see fig. 5, each first throttle 425 being arranged in one through hole 4231.
In some embodiments, the pressure reducing restriction includes a plurality of second restrictions 426, each second restriction 426 disposed within one of the flow passages.
Referring to fig. 6, a second orifice 426 may be provided at the junction of the flow channel and the inner cylinder 422.
It will be readily appreciated that in some embodiments, only the first orifice 425 is provided in the coolant lead-out structure. In some embodiments, only the second throttle 426 is provided in the coolant leading structure. In some embodiments, both the first orifice 425 and the second orifice 426 are provided in the coolant outlet structure.
Referring to fig. 6 to 8, the first and second throttle members 425 and 426 may each have a labyrinth type throttle structure.
Referring to fig. 5, the connection pipe 424 extends obliquely upward from the cylinder part 423 to the inner cylinder 422. Thus, the coolant flow direction can be changed to a large extent when the coolant enters the flow passage from the through hole 4231 of the cylinder portion 423 and enters the inner annular gap 4221 from the flow passage, thereby functioning to depressurize the coolant by changing the coolant flow direction.
In some embodiments, the angle between the connecting conduit 424 and the body 423 may be selected to be 20 to 70 degrees. In further embodiments, the angle between the connecting conduit 424 and the body 423 may preferably be 30 to 60 degrees. In further embodiments, the angle between the connecting conduit 424 and the body 423 may further preferably be 40 to 50 degrees.
The cylinder 423, the opening of the pump support 41, the outer cylinder 421, and the inner cylinder 422 are concentrically arranged. Thereby, it is possible to facilitate not only the strength of the pump support assembly as a whole but also the uniform flow of the coolant in the circumferential direction of the inner annular gap 4221.
The number of connecting conduits 424 may be 4, 5, 6, 7, 8, etc. In some embodiments, the number of connecting conduits 424 is even in order to increase the strength of the pump support assembly as a whole.
In some embodiments, connecting conduits 424 are evenly distributed at equal intervals between barrel 423 and inner barrel 422.
In some embodiments, the connecting conduits 424 may not be evenly spaced between the body 423 and the inner cylinder 422 due to the need to give way to the temperature collection device. At this time, the arrangement of the connecting pipes 424 needs to be reasonably designed.
Assuming that the number of the connecting pipes 424 is N, N is an even number, and N is equal to or greater than 4, the arrangement of the N connecting pipes 424 between the cylinder part 423 and the inner cylinder 422 may be performed according to the following rule: n-2 connecting pipelines 424 are arranged according to the included angle of 360/N between two adjacent connecting pipelines 424, and the remaining 2 connecting pipelines 424 are deviated from each other by the same preset angle, so that the included angle between the remaining 2 connecting pipelines 424 is larger than 360/N. The temperature-collecting means is disposed between the remaining 2 connecting pipes 424. This design is advantageous to promote uniform flow of coolant circumferentially in the inner annular gap 4221.
In some embodiments, the predetermined angle may be 5 to 15 degrees.
Specifically, for the embodiment shown in FIG. 9, the number of connecting conduits 424 is 8. Wherein, the 6 connecting pipelines 424 except the first connecting pipeline 424A and the second connecting pipeline 424B are arranged according to the included angle of 45 degrees between two adjacent connecting pipelines 424, the first connecting pipeline 424A and the second connecting pipeline 424B are deviated from each other by the same angle, and the included angle between the first connecting pipeline 424A and the second connecting pipeline 424B is larger than 45 degrees. The temperature-collecting device is disposed between the first connecting pipe 424A and the second connecting pipe 424B.
In some embodiments, the reactor of embodiments of the present application is a mini-reactor. For a small reactor, the upper ends of the inner cylinder 422 and the outer cylinder 421 of the cooling system 42 of the pump support 41 are disposed above the sodium liquid level, and the effect of temperature unevenness of the pump support 41 is small, so that the upper ends of the inner cylinder 422 and the outer cylinder 421 can follow the shape design of the pressure vessel head 12, as shown in fig. 10.
In some embodiments, the reactor of the embodiments of the present application is a chinese demonstration fast reactor. For the Chinese demonstration fast reactor, the diameter and the height of the pressure vessel are large, and because the top cover 12 of the pressure vessel adopts a conical structure, when the pump support 41 passes through the conical top cover, one side of the pump support is positioned inside the reactor vessel, and the other side of the pump support is positioned outside the reactor vessel, the circumferential temperature of the pump support 41 is uneven, and the levelness of the mounting surface of the pump support 41 is affected. In order to reduce the difference in the vertical displacement of the mounting surface of the pump bearing 41 due to temperature unevenness, in some embodiments, the top end periphery of the inner cylinder 422 and the top end periphery of the outer cylinder 421 are horizontally flush and extend to the connecting portion 412 of the pump bearing 41, so that the top ends of the inner cylinder 422 and the outer cylinder 421 of the pump bearing assembly extend into the inside of the connection pipe 1213 of the pressure vessel top cover 12.
Through theoretical analysis and numerical simulation, the embodiment of the application reduces the circumferential temperature difference of the original pump support 41 from 60 ℃ to 30 ℃ by arranging the pressure reduction throttling element and extending the top end of the inner cylinder 422 and the top end of the outer cylinder 421 upwards to the inside of the connecting pipe 1213 extending into the pressure vessel top cover 12, so that the highest and lowest displacement difference of the mounting surface of the pump support 41 is reduced from 2.89mm to 0.264 mm. The circumferential temperature uniformity of the pump support 41 is greatly improved, and the levelness of the mounting surface of the pump support 41 can be improved better.
It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention is subject to the scope of the claims.
Claims (12)
1. A cooling system for a power pump of a reactor, wherein the cooling system is mounted on a pump support supporting the power pump, the pump support being provided with an outlet for coolant pumped by the power pump to flow out, the cooling system comprising:
the inner cylinder is arranged on the radial outer side of the pump support, an inner annular gap is formed between the inner cylinder and the pump support, and the inner cylinder is provided with at least one liquid flow through hole;
the outer cylinder is positioned on the radial outer side of the outer cylinder, and an outer annular gap is formed between the outer cylinder and the inner cylinder;
a coolant outlet structure for introducing a portion of the coolant flowing from the pump support outlet into the inner annular gap; and
and a pressure reducing throttling member, which is arranged on the coolant leading-out structure and is used for reducing the pressure of part of the coolant flowing out from the pump support outlet and then flowing into the inner annular gap.
2. The cooling system of claim 1, wherein the outlet of the pump support is provided at a bottom of the pump support,
the coolant lead-out structure includes:
the cylinder body is connected with the outlet of the pump support, and a plurality of through holes are formed in the circumferential direction of the cylinder body; and
and the connecting pipelines are connected with the cylinder body part and the inner cylinder body, and a liquid flow channel communicated with one through hole and the inner annular gap is formed in each connecting pipeline.
3. The cooling system of claim 2, wherein the pressure reducing orifice comprises a plurality of first orifices, each of the first orifices being disposed within one of the through-holes.
4. The cooling system of claim 3, wherein said pressure reducing restriction further comprises a plurality of second restrictions, each of said second restrictions being disposed within one of said flow passages.
5. The cooling system according to claim 4,
the second throttling element is arranged at the joint of the liquid flow channel and the inner cylinder body.
6. The cooling system according to claim 4,
the first throttle and the second throttle have a labyrinth structure.
7. The cooling system, as set forth in claim 2, wherein the barrel, the pump support opening, the outer barrel, and the inner barrel are concentrically arranged.
8. The cooling system, as set forth in claim 7, wherein the connecting duct extends obliquely upward from the barrel portion to the inner barrel.
9. The cooling system according to claim 7, wherein a top end of the pump support is provided with a connection portion for fixed connection with a pressure vessel head of the reactor,
the top end periphery of interior barrel with the top end periphery of outer barrel is along the horizontal direction parallel and level, and extends to connecting portion.
10. A reactor pump support assembly, comprising:
a pump support for supporting the power pump;
a cooling system as claimed in any one of claims 1 to 9 for cooling the power pump.
11. A reactor, comprising:
a pressure vessel body containing a coolant therein;
a pressure vessel header that forms a pressure vessel of the reactor together with the pressure vessel body;
a core assembly disposed within the pressure vessel;
a power pump for pumping coolant to the core assembly;
a pump support assembly as defined in claim 10 secured to said pressure vessel header for supporting and cooling said power pump.
12. The reactor of claim 11, wherein the pressure vessel header comprises:
the connecting part is used for being connected with the pressure container body; and
a tapered body extending obliquely upward from the connecting portion, wherein the tapered body is provided with a mounting opening for mounting the pump support assembly, and a connection pipe extending upward from a periphery of the mounting opening,
the top end of the inner cylinder body and the top end of the outer cylinder body of the pump supporting assembly extend into the connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111229869.XA CN113982909A (en) | 2021-10-22 | 2021-10-22 | Reactor, pump support assembly and cooling system for power pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111229869.XA CN113982909A (en) | 2021-10-22 | 2021-10-22 | Reactor, pump support assembly and cooling system for power pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113982909A true CN113982909A (en) | 2022-01-28 |
Family
ID=79740134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111229869.XA Pending CN113982909A (en) | 2021-10-22 | 2021-10-22 | Reactor, pump support assembly and cooling system for power pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113982909A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201242878Y (en) * | 2008-08-06 | 2009-05-20 | 中国原子能科学研究院 | Pool type on-line cooling system for sodium cold rapid stack main container |
| CN102647047A (en) * | 2012-05-22 | 2012-08-22 | 哈尔滨电气动力装备有限公司 | Shielded motor for reactor coolant pump |
| CN202713052U (en) * | 2012-05-22 | 2013-01-30 | 哈尔滨电气动力装备有限公司 | Shielding motor applied to reactor coolant pump |
| CN103106928A (en) * | 2011-11-10 | 2013-05-15 | 巴布科克和威尔科克斯核能股份有限公司 | Pressurized Water Reactor With Upper Plenum Including Cross-Flow Blocking Weir |
| WO2018114660A1 (en) * | 2016-12-20 | 2018-06-28 | KSB SE & Co. KGaA | Pump arrangement, and nuclear reactor having a pump arrangement of this type |
| CN109340183A (en) * | 2018-09-21 | 2019-02-15 | 中广核研究院有限公司 | A kind of nuclear reactor coolant pump and its pump shell structure |
| CN111033022A (en) * | 2017-09-20 | 2020-04-17 | 宝马股份公司 | Internal combustion engine housing with cylinder cooling |
-
2021
- 2021-10-22 CN CN202111229869.XA patent/CN113982909A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201242878Y (en) * | 2008-08-06 | 2009-05-20 | 中国原子能科学研究院 | Pool type on-line cooling system for sodium cold rapid stack main container |
| CN103106928A (en) * | 2011-11-10 | 2013-05-15 | 巴布科克和威尔科克斯核能股份有限公司 | Pressurized Water Reactor With Upper Plenum Including Cross-Flow Blocking Weir |
| CN102647047A (en) * | 2012-05-22 | 2012-08-22 | 哈尔滨电气动力装备有限公司 | Shielded motor for reactor coolant pump |
| CN202713052U (en) * | 2012-05-22 | 2013-01-30 | 哈尔滨电气动力装备有限公司 | Shielding motor applied to reactor coolant pump |
| WO2018114660A1 (en) * | 2016-12-20 | 2018-06-28 | KSB SE & Co. KGaA | Pump arrangement, and nuclear reactor having a pump arrangement of this type |
| CN111033022A (en) * | 2017-09-20 | 2020-04-17 | 宝马股份公司 | Internal combustion engine housing with cylinder cooling |
| CN109340183A (en) * | 2018-09-21 | 2019-02-15 | 中广核研究院有限公司 | A kind of nuclear reactor coolant pump and its pump shell structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5497454B2 (en) | Pressurized water reactor skirt rectifier | |
| US4039377A (en) | Nuclear boiler | |
| CN101681685B (en) | Nuclear reactor downcomer flow deflector | |
| CN101584007B (en) | Nuclear reactor alignment plate configuration | |
| JP2015502531A (en) | Pressurized water reactor with an upper plenum including a cross-flow blocking weir | |
| JP2014081212A (en) | Core meltdown object holding device and nuclear reactor container | |
| CN113982909A (en) | Reactor, pump support assembly and cooling system for power pump | |
| KR101744319B1 (en) | Externally Integrated Steam generator Small Modular Reactor | |
| JPS627996B2 (en) | ||
| CN113963819B (en) | Reactor and radial heat shield therefor and cooling device for pressure vessel | |
| KR102295616B1 (en) | Concrete air cooling system using the embedded pipe | |
| CN103871503A (en) | Nuclear reactor lower chamber plate-like flow distribution apparatus | |
| US4077835A (en) | Nuclear reactor with self-orificing radial blanket | |
| US20220319723A1 (en) | Nuclear reactor | |
| JPH0531750B2 (en) | ||
| CN210265139U (en) | Small-pile main pump | |
| CN106763236A (en) | A kind of hydrogenerator | |
| CN111916230B (en) | Pressurized water reactor capable of realizing circumferential uniform distribution of flow of descending section | |
| US8950365B2 (en) | Feed water pipe for steam generator | |
| CN218826434U (en) | Heat exchange device for liquid cooling resistor | |
| CN113948225B (en) | Reactor with top heat shield | |
| KR20050080970A (en) | Steam generator in integrated reactor with flow distributor | |
| CN218494052U (en) | Cooling structure of hydrodynamic bearing | |
| CN216407696U (en) | Cooling structure of speed reducer | |
| CN111366025B (en) | Block-hole type graphite heat exchanger and heat exchange method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220128 |