CN216871595U - Condensate water drainage system device of passive nuclear power plant - Google Patents
Condensate water drainage system device of passive nuclear power plant Download PDFInfo
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- CN216871595U CN216871595U CN202220227847.3U CN202220227847U CN216871595U CN 216871595 U CN216871595 U CN 216871595U CN 202220227847 U CN202220227847 U CN 202220227847U CN 216871595 U CN216871595 U CN 216871595U
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Abstract
The utility model provides a condensed water drainage system device of a passive nuclear power plant, which is used for collecting condensed water generated in a containment vessel, and comprises an upper ring groove, a lower ring groove, a reinforcing rib and a backflow groove which are sequentially and circumferentially arranged along the inner wall of the containment vessel from top to bottom; go up the surface of annular and set up two at least first mouths that catchment, two at least second mouths that catchment are seted up to the surface of lower annular, the backward flow groove be provided with two at least collection boxes, the top of stiffening rib is equipped with the manifold that extends to in the collection box, the one end that the manifold kept away from the collection box is connected the blast pipe, the bottom of collecting the box sets up the drain pipe respectively. The utility model improves the condensed water drainage capability of the passive nuclear power plant, shortens the cooling time of the reactor coolant after shutdown, and improves the allowance.
Description
Technical Field
The utility model belongs to the technical field of special safety facilities of a nuclear power plant, relates to a passive core cooling system, and particularly relates to a condensate water drainage system device of the passive nuclear power plant.
Background
The passive residual heat removal is one of the most important functions of the passive core cooling system of the passive nuclear power plant, and different from the traditional second-generation pressurized water reactor nuclear power plant, under the condition that no loss of coolant occurs, the core decay heat of the passive nuclear power plant is led out, only one passive residual heat removal heat exchanger arranged in a containment replacement water tank is utilized, and the core decay heat is transferred to the boron-containing water in the containment replacement water tank through natural circulation between a reactor and a PRHR HX (passive residual heat exchanger). For safety shutdown temperature analysis acceptance criteria, the passive core cooling system should have sufficient capacity to reduce the average reactor coolant system temperature to below 215.6 ℃ within 36 hours after shutdown. According to the safety analysis of the test result, the passive core cooling system reduces the average temperature of RCS (reactor cooling system) to 215.6 ℃ when the time is close to 36 hours after shutdown, and the margin is very small. Therefore, in order to improve the efficiency of the condensate recovery system, it is necessary to effectively solve the problem that the drainage capacity of the downpipe is too low.
CN113793705A discloses an experimental device for a lead-bismuth fast reactor passive emergency waste heat discharge system, which consists of a condensation system, a water charging system, a preheating section, a heating system, a nitrogen supply system, a flow measurement system, a deionized water charging system, a main steam pipeline electric stop valve and a return pipeline electric stop valve; the condensing system consists of a condensing water tank and a condenser, wherein a plurality of electric heating rods are arranged in the condensing water tank, the condenser is arranged in the condensing water tank, and a discharge valve is connected with the condensing water tank and used for adjusting the pressure of the condensing water tank; and a reflux pipeline electric stop valve is arranged on a reflux pipeline connecting the condenser and the preheating section.
CN212333542U discloses an apparatus for collecting condensed water, which is provided with a condensed water collecting device; the condensed water collecting device comprises a first liquid receiving disc and a first water discharging element, wherein: the first liquid receiving tray is arranged on the outer surface of the side wall of the equipment in a surrounding mode along the circumferential direction of the side wall and attached to the side wall so as to contain condensed water; the first drainage element is communicated with the first liquid receiving disc. The condensed water collecting device further comprises a second liquid receiving disc and a second water discharging element, the second liquid receiving disc is arranged below the device, and the second water discharging element is communicated with the second liquid receiving disc.
CN104167230A discloses a passive concrete containment cooling system, which is suitable for guiding out heat in a containment, and includes a heat exchange loop system and a condensate water recovery system, where the heat exchange loop system hermetically penetrates through the containment to guide out the heat in the containment outside the containment, and the condensate water recovery system is disposed in the containment and communicated with a reactor pit in the containment.
The reason that the drainage capacity of a water falling pipe in the conventional condensate water recovery system is too low is that the pipe diameter of a drainage pipeline is small, the horizontal pipeline is too long, so that the air exhaust is not smooth, and in addition, the outlet of the drainage pipe of a collection box is submerged in cooling water of a refueling water tank in a containment vessel, so that the drainage capacity is reduced.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a condensate water drainage system device of a passive nuclear power plant, which improves the condensate water drainage capability of the passive nuclear power plant, shortens the cooling time of a reactor coolant after shutdown, improves the allowance so as to further improve the safety performance of the power plant, and has higher safety, stability and reliability.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a condensed water drainage system device of a passive nuclear power plant, which is used for collecting condensed water generated in a containment vessel, and comprises an upper ring groove, a lower ring groove, a reinforcing rib and a backflow groove which are sequentially and circumferentially arranged along the inner wall of the containment vessel from top to bottom;
go up the surface of annular and set up two at least first mouths that catchment, two at least second mouths that catchment are seted up to the surface of lower annular, the backward flow groove be provided with two at least collection boxes, the top of stiffening rib is equipped with the manifold that extends to in the collection box, the one end that the manifold kept away from the collection box is connected the blast pipe, the bottom of collecting the box sets up the drain pipe respectively.
The condensate water drainage system device of the passive nuclear power plant improves the condensate water drainage capability of the passive nuclear power plant, shortens the cooling time of a reactor coolant after shutdown, improves the allowance, further improves the safety performance of the power plant, and has higher safety, stability and reliability.
It should be noted that, the upper ring groove, the lower ring groove, the reinforcing ribs and the backflow groove are sequentially fixed on the inner wall of the containment vessel in a surrounding manner from top to bottom, and the function of collecting condensed water is achieved. The pipeline pipe fittings are all made of stainless steel, and other pipeline pipe fittings except the vertically arranged pipeline are all continuously inclined downwards by at least 30 degrees, so that gas accumulation is avoided, and the water diversion capacity is improved.
As a preferable technical solution of the present invention, the bottom of the first water collecting port is respectively provided with a first pipe, and one end of the first pipe far away from the first water collecting port is connected to the collecting pipe.
In a preferred embodiment of the present invention, the nominal pipe diameter of the first pipe is 50 to 150mm, for example, 50mm, 75mm, 100mm, 125mm or 150mm, but the nominal pipe diameter is not limited to the values listed, and other values not listed in the range of the values are also applicable.
As a preferable technical solution of the present invention, the bottom of the second water collecting port is respectively provided with a second pipe, and one end of the second pipe far away from the second water collecting port is connected to the collecting pipe.
In a preferred embodiment of the present invention, the nominal pipe diameter of the second pipe is 25 to 75mm, for example 25mm, 50mm or 75mm, but the nominal pipe diameter is not limited to the values listed, and other values not listed in the range of the nominal pipe diameter are also applicable.
As a preferable technical solution of the present invention, at least two third water collecting ports are formed on the surface of the reinforcing rib, third pipelines are respectively arranged at the bottoms of the third water collecting ports, and the third pipelines are used for discharging the condensed water on the surface of the reinforcing rib to the reflux groove.
In a preferred embodiment of the present invention, the nominal pipe diameter of the third pipe is 75-150 mm, such as 75mm, 100mm, 125mm or 150mm, but the third pipe is not limited to the values listed, and other values not listed in the range of the values are also applicable.
In a preferred embodiment of the present invention, the nominal pipe diameters of the collecting pipe and the exhaust pipe are 125 to 175mm, such as 125mm, 150mm or 175mm, but the utility model is not limited to the values listed, and other values not listed in the range of the values are also applicable.
The nominal diameter of the trap is 25 to 50mm, for example 25mm, 30mm or 50mm, but is not limited to the values listed, and other values not listed in this range are equally applicable.
As a preferred technical solution of the present invention, the condensate drainage system device of the passive nuclear power plant further includes a water collection pipe, and the water collection pipe discharges condensate generated at the top of the containment into the upper annular groove.
As a preferable technical solution of the present invention, a screen is disposed on a surface of the backflow groove.
It should be noted that, in the present invention, the inlets of the first duct, the second duct, and the third duct are respectively and independently provided with a filter screen.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the utility model to the precise numerical values encompassed within the range for brevity and clarity.
The system refers to an equipment system, or a production equipment.
Compared with the prior art, the utility model has the beneficial effects that:
the condensate water drainage system device of the passive nuclear power plant improves the condensate water drainage capability of the passive nuclear power plant, shortens the cooling time of a reactor coolant after shutdown, improves the allowance, further improves the safety performance of the power plant, and has higher safety, stability and reliability.
Drawings
Fig. 1 is a schematic structural diagram of a condensate drainage system device of a passive nuclear power plant according to embodiment 1 of the present invention.
Wherein, 1-a water collecting pipe; 2-upper ring groove; 3-lower ring groove; 4-reinforcing ribs; 5-a reflux tank; 6-a collection box; 7-a manifold; 8-an exhaust pipe; 9-filtering the screen; 10-a first conduit; 11-a second conduit; 12-a third conduit; 13-hydrophobic tube.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
In a specific embodiment, the utility model provides a condensate drainage system device of a passive nuclear power plant, which is used for collecting condensate generated in a containment vessel, and comprises an upper annular groove 2, a lower annular groove 3, a reinforcing rib 4 and a return groove 5 which are sequentially and circumferentially arranged along the inner wall of the containment vessel from top to bottom.
Go up the surface of annular 2 and set up two at least first mouths that catchment, at least two second mouths that catchment are seted up to the surface of lower annular 3, backwash trough 5 on be provided with two at least collection boxes 6, the top of stiffening rib 4 is equipped with the manifold 7 that extends to in collecting the box 6, the one end that collects the box 6 is kept away from to manifold 7 is connected blast pipe 8, the bottom of collecting the box 6 sets up drain pipe 13 respectively.
The upper ring groove 2, the lower ring groove 3, the reinforcing ribs 4 and the backflow groove 5 are sequentially fixed on the inner wall of the containment vessel in a surrounding manner from top to bottom, and the function of collecting condensed water is achieved. The pipeline pipe fittings are all made of stainless steel, and other pipeline pipe fittings except the vertically arranged pipeline are all continuously inclined downwards by at least 30 degrees, so that gas accumulation is avoided, and the water diversion capacity is improved. The gas in the pipeline is discharged by arranging the exhaust pipe 8, which is beneficial to improving the water delivery capacity of the pipeline. The condensed water collected by the collecting pipe 7 and the return tank 5 is finally collected in the collecting box 6 and then is respectively led to the displacement feed water tank in the containment through the drain pipes 13. In order to improve the drainage capability of the drain pipe 13, the height of the outlet of the drain pipe 13 is higher than the height of the liquid level in the refueling water tank arranged in the containment.
Further, the bottom of the first water collecting port is respectively provided with a first pipeline 10, and one end of the first pipeline 10 far away from the first water collecting port is connected with the collecting pipe 7.
Further, the nominal pipe diameter of the first pipeline 10 is 75-150 mm, and preferably 100 mm.
Furthermore, the bottom of the second water collecting port is respectively provided with a second pipeline 11, and one end of the second pipeline 11 far away from the second water collecting port is connected with the collecting pipe 7. The condensed water generated between the upper ring groove 2 and the lower ring groove 3 is guided into the collecting pipe 7 by the second pipeline 11.
Further, the nominal pipe diameter of the second pipeline 11 is 25-75 mm, and preferably 50 mm.
Furthermore, at least two third water collecting ports are formed in the surface of the reinforcing rib 4, third pipelines 12 are respectively arranged at the bottoms of the third water collecting ports, and the third pipelines 12 are used for discharging the condensed water on the surface of the reinforcing rib 4 to the reflux groove 5. The condensed water generated between the lower ring groove 3 and the reinforcing rib 4 is collected by the reinforcing rib 4, and is directly discharged to the backflow groove 5 after being collected through the third pipe 12, and the backflow groove 5 at a position corresponding to the third pipe 12 is locally widened, so that the condensed water is collected. The condensate water generated between the reinforcing ribs 4 and the return grooves 5 will be collected by the return grooves 5.
Further, the nominal pipe diameter of the third pipeline 12 is 75-150 mm, and preferably 100 mm.
Furthermore, the nominal pipe diameters of the collecting pipe 7 and the exhaust pipe 8 are 125-175 mm, preferably 150mm, independently, and the nominal pipe diameter of the drain pipe 13 is 25-50 mm.
Further, the condensate water drainage system device of the passive nuclear power plant further comprises a water collecting pipe 1, and the water collecting pipe 1 discharges condensate water generated at the top of the containment to the upper ring groove 2. After being collected, the condensed water generated on the containment dome is drained into the upper ring groove 2 by the water collecting pipe 1, is collected again by the upper ring groove 2, and is drained into the collecting pipe 7 through the first pipeline 10.
Further, a screen 9 is disposed on the surface of the return groove 5. The inlets of the first duct 10, the second duct 11 and the third duct 12 in the present invention are respectively and independently provided with the screens 9.
Example 1
The embodiment provides a condensate water drainage system device of a passive nuclear power plant, which is used for collecting condensate water generated in a containment vessel, and comprises an upper ring groove 2, a lower ring groove 3, a reinforcing rib 4 and a return groove 5 which are sequentially arranged from top to bottom along the inner wall of the containment vessel in a surrounding manner, as shown in fig. 1. Four first water collecting openings are formed in the surface of the upper ring groove 2, four second water collecting openings are formed in the surface of the lower ring groove 3, two collecting boxes 6 are arranged on the backflow groove 5, a collecting pipe 7 extending into each collecting box 6 is arranged above each reinforcing rib 4, one end, far away from each collecting box 6, of each collecting pipe 7 is connected with an exhaust pipe 8 bent to one side close to each reinforcing rib 4, and a drain pipe 13 is arranged at the bottom of each collecting box 6. The height of the outlet of the drain pipe 13 is higher than the height of the liquid level in the refueling water tank arranged in the containment. Wherein the nominal pipe diameters of the collecting pipe 7 and the exhaust pipe 8 are both 150mm, and the nominal pipe diameter of the drain pipe 13 is 50 mm.
The bottom of the first water collecting opening is respectively provided with a first pipeline 10, one end of the first pipeline 10 far away from the first water collecting opening is connected with the collecting pipe 7, and the nominal pipe diameter of the first pipeline 10 is 100 mm. The bottom of the second water collecting opening is respectively provided with a second pipeline 11, one end of the second pipeline 11, which is far away from the second water collecting opening, is connected with the collecting pipe 7, and the nominal pipe diameter of the second pipeline 11 is 50 mm.
The surface of the reinforcing rib 4 is provided with four third water collecting ports, the bottoms of the third water collecting ports are respectively provided with a third pipeline 12, the third pipelines 12 are used for directly discharging collected condensed water to the reflux groove 5, the local part of the reflux groove 5 at the position corresponding to the third pipeline 12 is widened, and the nominal pipe diameter of the third pipeline 12 is 100 mm. The surface of the return tank 5, and the inlets of the first duct 10, the second duct 11, and the third duct 12 are respectively and independently provided with a strainer 9.
The condensed water drainage system device of the passive nuclear power plant further comprises a water collecting pipe 1, condensed water generated on a containment dome is drained into the upper ring groove 2 through the water collecting pipe 1 after being collected, and is collected again in the upper ring groove 2, and then is drained into a collecting pipe 7 through a first pipeline 10, and the nominal pipe diameter of the water collecting pipe 1 is 100 mm.
The pipeline pipe fittings of the condensate water drainage system device of the passive nuclear power plant are all made of stainless steel, and except for the vertically arranged pipelines, other pipeline pipe fittings are all inclined downwards by 30 degrees continuously.
The condensate water drainage system device of the passive nuclear power plant improves the condensate water drainage capability of the passive nuclear power plant, shortens the cooling time of a reactor coolant after shutdown, improves the allowance, further improves the safety performance of the power plant, and has higher safety, stability and reliability.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A condensate water drainage system device of a passive nuclear power plant is used for collecting condensate water generated in a containment vessel and is characterized by comprising an upper ring groove, a lower ring groove, reinforcing ribs and a backflow groove which are circumferentially arranged along the inner wall of the containment vessel from top to bottom in sequence;
go up the surface of annular and set up two at least first mouths that catchment, two at least second mouths that catchment are seted up to the surface of lower annular, the backward flow groove be provided with two at least collection boxes, the top of stiffening rib is equipped with the manifold that extends to in the collection box, the one end that the manifold kept away from the collection box is connected the blast pipe, the bottom of collecting the box sets up the drain pipe respectively.
2. The condensate drainage system device of a passive nuclear power plant according to claim 1, wherein the first water collecting ports are respectively provided with a first pipeline at the bottom, and one ends of the first pipelines far away from the first water collecting ports are connected with the collecting pipes.
3. The condensate drainage system apparatus of a passive nuclear power plant according to claim 2, wherein the nominal pipe diameter of the first pipeline is 50-150 mm.
4. The condensate drainage system device of a passive nuclear power plant according to claim 1, wherein the bottoms of the second water collecting ports are respectively provided with second pipes, and one ends of the second pipes, which are far away from the second water collecting ports, are connected with the collecting pipes.
5. The condensate drainage system apparatus of a passive nuclear power plant according to claim 4, wherein the second pipeline has a nominal pipe diameter of 25-75 mm.
6. The condensate drainage system apparatus for a passive nuclear power plant according to claim 1, wherein at least two third water collecting ports are formed on the surface of the reinforcing rib, third pipes are respectively provided at the bottoms of the third water collecting ports, and the third pipes are used for discharging condensate on the surface of the reinforcing rib to the return channel.
7. The condensate drainage system apparatus of a passive nuclear power plant according to claim 6, wherein the third pipeline has a nominal pipe diameter of 75-150 mm.
8. The condensate drainage system apparatus of a passive nuclear power plant according to claim 1, wherein the nominal pipe diameters of the collecting pipe and the exhaust pipe are 125-175 mm independently, and the nominal pipe diameter of the drain pipe is 25-50 mm.
9. The condensate drainage system apparatus of a passive nuclear power plant according to claim 1, further comprising a water collection pipe, wherein the water collection pipe discharges condensate generated at the top of the containment into the upper annular trough.
10. The condensate drainage system apparatus of a passive nuclear power plant according to claim 1, wherein a surface of the backflow groove is provided with a screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220227847.3U CN216871595U (en) | 2022-01-27 | 2022-01-27 | Condensate water drainage system device of passive nuclear power plant |
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| CN202220227847.3U CN216871595U (en) | 2022-01-27 | 2022-01-27 | Condensate water drainage system device of passive nuclear power plant |
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| CN216871595U true CN216871595U (en) | 2022-07-01 |
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| CN202220227847.3U Active CN216871595U (en) | 2022-01-27 | 2022-01-27 | Condensate water drainage system device of passive nuclear power plant |
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