CN217306120U - Cooling system device of passive nuclear power station containment - Google Patents
Cooling system device of passive nuclear power station containment Download PDFInfo
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- CN217306120U CN217306120U CN202220244168.7U CN202220244168U CN217306120U CN 217306120 U CN217306120 U CN 217306120U CN 202220244168 U CN202220244168 U CN 202220244168U CN 217306120 U CN217306120 U CN 217306120U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- 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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Abstract
The utility model relates to a cooling system device of a passive nuclear power station containment, which comprises a water supply and distribution unit arranged above the containment, a drainage tank arranged around the side wall of the containment and a water return unit arranged below the containment; the water supply and distribution unit comprises a water tank, a first valve and water distribution equipment which are sequentially arranged along the vertical direction; the water return unit comprises a first water collection tank, a first solid-liquid separation device, a heat exchanger, a second water collection tank, a second solid-liquid separation device and a pump which are arranged in sequence; the liquid outlet of the water drainage groove is connected with the first collecting water tank; the liquid outlet of the pump is respectively connected with the water tank and the water distribution equipment through a first pipeline and a second pipeline; the bottom of the first collecting water tank is provided with a second valve. The cooling system device can continuously send cooling water which is not evaporated in cooling back to a water tank or water distribution equipment for cooling the containment, so that the flow of the cooling water flowing through the first valve is increased, the thickness of the water film on the surface of the containment is increased, and the water cooling effect of the containment is enhanced.
Description
Technical Field
The utility model relates to a nuclear power plant establishes the safety facility field specially, the cooling system device of the passive nuclear power station containment of a specific design.
Background
The containment vessel of the pressurized water reactor is generally cooled in the nuclear power station under the accident condition, so that the pressure and the temperature in the containment vessel are reduced, and the integrity of a fourth safety barrier of the nuclear power station is ensured.
A pressurized water reactor nuclear power plant containment cooling system such as CN202855316U, which includes a containment, a pressure vessel disposed in the containment, a steam generator connected to the pressure vessel, a pressure stabilizer connected between the pressure vessel and the steam generator, a refueling water tank disposed in the containment, a cooling system water tank disposed at the periphery of the containment, a first heat exchanger and a second heat exchanger disposed in the cooling system water tank; a first inlet pipe of the first heat exchanger is communicated with the space in the containment, and a first outlet pipe of the first heat exchanger is communicated with the refueling water tank; and a second inlet pipe of the second heat exchanger is communicated with the pressure stabilizer, and a second outlet pipe of the second heat exchanger is communicated with the pressure container. The heat load in the containment and the pressure vessel is discharged through the first heat exchanger and the second heat exchanger, and the heat is directly discharged to the cooling system water tank outside the containment, so that the capability of directly discharging the heat of the power plant outside the containment is enhanced, and the safety and the reliability of the nuclear power plant are improved.
CN104751910A discloses an emergency spray cooling system for a containment under the accident condition of a nuclear power station, wherein a plant is arranged in the containment, the emergency spray cooling system comprises a spray ring, a mobile pump and a water supplementing pipeline, the spray ring is arranged at the inner upper part of the plant and is connected with a plurality of nozzles for spraying water downwards, and the spray ring is communicated with a water tank through a normal pipeline; be equipped with the emergent interface of moisturizing in the normality pipeline, the moisturizing pipeline is connected in the emergent interface of moisturizing, and the mobile pump is connected in the moisturizing pipeline. When the nuclear power station is in the accident condition, a broken opening exists in a loop, at the moment, one end of a water supplementing pipeline is connected to a water supplementing emergency interface, the other end of the water supplementing pipeline is communicated with a water source, the water source can be introduced into the spray ring by utilizing the mobile pump, therefore, water is sprayed into the containment, the containment is cooled and depressurized, the radioactive substance is settled through water spraying and washing, the overpressure of the containment and the leakage of the radioactive substance are avoided, and the phenomenon that the radioactive substance pollutes the atmosphere of the environment is avoided.
Whereas conventional pressurized water reactor nuclear power plants typically implement containment cooling functions by containment spray systems. After an accident, spraying boron-containing water in the refueling water tank into the atmosphere of the containment by a spray pump arranged in an auxiliary factory building outside the containment, and condensing steam dispersed in the boron-containing water to reduce the temperature and the pressure in the containment.
The mode of cooling the containment of the passive nuclear power plant is greatly different from that of the traditional pressurized water reactor nuclear power plant, an active pump and a passive heat exchanger are not relied on, and the flow of a system medium is completely driven by natural force. Even if the AC power supply is available under the accident condition, the AC power supply is not utilized, and the problems of single function and low efficiency exist
SUMMERY OF THE UTILITY MODEL
In view of the problem that exists among the prior art, the utility model aims at providing a cooling system device of passive nuclear power station containment has realized the high efficiency cooling of the containment of passive nuclear power station, is showing the security that has promoted the containment during operation.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a cooling system device of a passive nuclear power station containment, which comprises a water supply and distribution unit arranged above the containment, a hydrophobic groove arranged around the side wall of the containment and a water return unit arranged below the containment;
the water supply and distribution unit comprises a water tank, a first valve and water distribution equipment which are sequentially arranged along the vertical direction;
the water return unit comprises a first water collection tank, a first solid-liquid separation device, a heat exchanger, a second water collection tank, a second solid-liquid separation device and a pump which are arranged in sequence;
the liquid outlet of the drainage tank is connected with the first collecting water tank;
a liquid outlet of the pump is respectively connected with the water tank and the water distribution equipment through a first pipeline and a second pipeline;
and a second valve is arranged at the bottom of the first water collecting tank.
By resetting the cooling system, the cooling water of the containment vessel which is not evaporated in the cooling process is collected, filtered and cooled, and then is continuously sent back to the water tank or water distribution equipment for cooling the containment vessel again, so that the flow of the cooling water flowing through the first valve is increased, the thickness of the water film on the surface of the containment vessel is increased, the water cooling effect of the containment vessel is enhanced, and when an alternating current power supply is lost or a pump is unavailable, the cooling water of the water tank for cooling the containment vessel can maintain the original function of cooling the containment vessel for 72 hours and be kept unchanged only by ensuring that the second valve is kept in a normally open state.
As the utility model discloses preferred technical scheme, first collection water tank with be provided with the overflow pipeline on the pipeline between the first solid-liquid separation equipment. The first collection tank may function to precipitate and collect larger debris impurities in the water stream.
In a preferred embodiment of the present invention, the diameter of the filtration pores of the first solid-liquid separation device is not more than 2mm, for example, 2mm, 1mm, 0.9mm, 0.8mm, 0.7mm, 0.6mm, 0.5mm, 0.4mm, 0.3mm, 0.2mm, 0.1mm, or 0.01mm, but not limited to the listed values, and other values not listed in this range are also applicable.
The diameter of the filtration pores of the second solid-liquid separation device is 2mm or less, and may be, for example, 2mm, 1mm, 0.9mm, 0.8mm, 0.7mm, 0.6mm, 0.5mm, 0.4mm, 0.3mm, 0.2mm, 0.1mm or 0.01mm, but not limited to the values listed, and other values not listed in the range are also applicable.
In a preferred embodiment of the present invention, the number of the pumps is at least 1, and for example, 1, 2, 3, 4, 5, or 6, but the present invention is not limited to the above-mentioned values, and other values not listed in the range are also applicable. When a plurality of pumps are arranged, the pumps are connected in parallel. Wherein the pump may be an electric pump or a diesel driven pump.
In a preferred embodiment of the present invention, the heat exchanger is provided with at least 1 heat exchanger, for example, 1, 2, 3, 4, 5, or 6 heat exchangers, but the present invention is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable. The heat exchanger transfers the heat of the cooling water to the surrounding atmosphere in a passive manner.
The pumps can be arranged in 2 sets, and are arranged in a parallel connection mode, wherein one set is used as a spare. The heat exchangers can be arranged in 2 sets, the heat exchangers are arranged in a parallel connection mode, and one heat exchanger is used for standby. Wherein the heat exchanger also can many jointly dispel the heat, promotes the circulation efficiency of cooling water.
In the utility model, the top of the second collecting water tank is provided with an atmospheric pipeline; the bottom of the second collecting water tank is provided with a drain port, and the drain port is provided with a drain valve.
As the utility model discloses preferred technical scheme, the water tank is collected to the second is provided with the level gauge.
As the utility model discloses preferred technical scheme, the level gauge pass through the PLC controller with the pump is connected.
In a preferred embodiment of the present invention, the vertical height of the outlet of the drainage groove to the ground is 10 to 15m, for example, 10m, 10.2m, 10.4m, 10.6m, 10.8m, 11m, 11.2m, 11.4m, 11.6m, 11.8m, 12m, 12.2m, 12.4m, 12.6m, 12.8m, 13m, 13.2m, 13.4m, 13.6m, 13.8m, 14m, 14.2m, 14.4m, 14.6m, 14.8m, or 15m, but not limited to the listed values, and other values not listed in the range are also applicable.
As the preferred technical scheme of the utility model, the volume of first collection water tank < the volume of second collection water tank.
As the preferred technical proposal of the utility model, the volume of the first collecting water tank is less than or equal to 1m 3 For example, it may be 1m 3 、0.95m 3 、0.9m 3 、0.85m 3 、0.85m 3 、0.8m 3 、0.75m 3 、0.7m 3 、0.65m 3 、0.6m 3 、0.55m 3 、0.5m 3 、0.45m 3 、0.4m 3 、0.35m 3 、0.3m 3 、0.25m 3 、0.2m 3 、0.15m 3 Or 0.1m 3 And the like, but are not limited to the recited values, other values not recited within the range are equally applicable.
The volume of the second collecting water tank is 10-100m 3 For example, it may be 10m 3 、15m 3 、20m 3 、25m 3 、30m 3 、35m 3 、40m 3 、45m 3 、50m 3 、55m 3 、60m 3 、65m 3 、70m 3 、75m 3 、80m 3 、85m 3 、90m 3 、95m 3 Or 100m 3 And the like, but are not limited to the recited values, other values not recited within the range are equally applicable.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
(1) the non-evaporated containment cooling water is collected, filtered and cooled and then is continuously sent back to a containment cooling water tank or water distribution equipment, so that the containment cooling water tank is always kept at a higher liquid level, the flow of the cooling water flowing through the first valve is increased, the thickness of a containment surface water film is increased, and the containment water cooling effect is enhanced.
(2) In the process, on one hand, cooling water is collected and reused, on the other hand, evaporation of the cooling water is suppressed to the lowest possible level, and 3000 tons of cooling water stored in the containment cooling water storage tank 1 can maintain the containment cooling for a longer time without an external water source, which is no longer limited to 72 hours. And the collecting water tank can be also provided with a water replenishing pipeline, so that the containment is kept to be cooled for a long enough time in a mode of externally replenishing certain cooling water.
(3) After an accident happens, if the alternating current power supply is lost or the circulating pump is unavailable, the second valve is kept in a normally open state, and the original function of cooling the containment for 72 hours can be kept unchanged by the cooling water in the containment cooling water tank.
Drawings
Fig. 1 is a schematic diagram of a cooling system device of a passive nuclear power plant containment vessel according to embodiment 1 of the present invention.
In the figure: 1.1-a water tank, 1.2-a first valve, 1.3-a water distribution device, 2.1-a safety shell, 2.2-a drain tank, 3.1-a first collecting water tank, 3.1.1-a second valve, 3.2-a first solid-liquid separation device, 3.3-a heat exchanger, 3.4-a second collecting water tank, 3.4.1-a drain valve, 3.4.2-a liquid level meter, 3.5-a second solid-liquid separation device, 3.6-a pump, 4-a PLC controller, 5-a third valve and 6-a fourth valve.
The present invention will be described in further detail below. However, the following examples are merely exemplary of the present invention and do not represent or limit the scope of the present invention, which is defined by the appended claims.
Detailed Description
To better illustrate the present invention, facilitating the understanding of the technical solutions of the present invention, typical but not limiting embodiments of the present invention are as follows:
example 1
The embodiment provides a cooling system device of a passive nuclear power station containment, as shown in fig. 1, the cooling system device of the passive nuclear power station containment comprises a water supply unit arranged above a containment 2.1, a water drainage tank 2.2 arranged around the side wall of the containment 2.1 and a water return unit arranged below the containment 2.1;
the water supply and distribution unit comprises a water tank 1.1, a first valve 1.2 and water distribution equipment 1.3 which are sequentially arranged along the vertical direction;
the water return unit comprises a first water collection tank 3.1, a first solid-liquid separation device 3.2, a heat exchanger 3.3, a second water collection tank 3.4, a second solid-liquid separation device 3.5 and a pump 3.6 which are arranged in sequence;
the liquid outlet of the drainage tank 2.2 is connected with the first collecting water tank 3.1;
a liquid outlet of the pump 3.6 is respectively connected with the water tank 1.1 and the water distribution equipment 1.3 through a first pipeline and a second pipeline; a third valve 5 is arranged on the first pipeline; a fourth valve 6 is arranged on the second pipeline;
the bottom of the first collecting water tank 3.1 is provided with a second valve 3.1.1.
An overflow pipeline is arranged on a pipeline between the first collecting water tank 3.1 and the first solid-liquid separation equipment 3.2.
The diameter of a filter hole of the first solid-liquid separation equipment 3.2 is 1 mm; the diameter of the filter hole of the second solid-liquid separation equipment 3.5 is 1 mm.
And an atmospheric pipeline is arranged at the top of the second collecting water tank 3.4.
A drain opening is formed in the bottom of the second water collecting tank 3.4; the drain port is provided with a drain valve 3.4.1.
The second collection tank 3.4 is provided with a level gauge 3.4.2; the liquid level meter 3.4.2 is connected with the pump 3.6 through a PLC 4;
the vertical height between the liquid outlet of the drainage groove 2.2 and the ground is 10 m; the first collecting water tank 3.1 has a volume of 1m 3 (ii) a The volume of the second collection tank 3.4 is 100m 3 。
Example 2
The embodiment provides a cooling system device of a passive nuclear power station containment, which comprises a water supply and distribution unit arranged above a containment 2.1, a water drainage tank 2.2 arranged around the side wall of the containment 2.1 and a water return unit arranged below the containment 2.1;
the water supply and distribution unit comprises a water tank 1.1, a first valve 1.2 and water distribution equipment 1.3 which are sequentially arranged along the vertical direction;
the water return unit comprises a first water collection tank 3.1, a first solid-liquid separation device 3.2, a heat exchanger 3.3, a second water collection tank 3.4, a second solid-liquid separation device 3.5 and a pump 3.6 which are arranged in sequence;
the liquid outlet of the drainage tank 2.2 is connected with the first collecting water tank 3.1;
a liquid outlet of the pump 3.6 is respectively connected with the water tank 1.1 and the water distribution equipment 1.3 through a first pipeline and a second pipeline; a third valve 5 is arranged on the first pipeline; a fourth valve 6 is arranged on the second pipeline;
the bottom of the first collecting water tank 3.1 is provided with a second valve 3.1.1.
An overflow pipeline is arranged on a pipeline between the first collecting water tank 3.1 and the first solid-liquid separation equipment 3.2.
The diameter of a filter hole of the first solid-liquid separation equipment 3.2 is 0.5 mm; the diameter of the filter hole of the second solid-liquid separation equipment 3.5 is 0.5 mm.
The top of the second collecting water tank 3.4 is provided with an overflow port.
A drain opening is formed in the bottom of the second water collecting tank 3.4; the drain port is provided with a drain valve 3.4.1.
The second collection tank 3.4 is provided with a level gauge 3.4.2; the liquid level meter 3.4.2 is connected with the pump 3.6 through a PLC 4;
the vertical height between the liquid outlet of the drainage groove 2.2 and the ground is 15 m; the first collecting water tank 3.1 has a volume of 0.5m 3 (ii) a The volume of the second collecting tank 3.4 is 10m 3 。
Application example
The cooling system device in embodiment 1 is used for cooling the containment, specifically, after the first valve is opened, cooling water is distributed by the water distribution equipment and enters the top of the containment, and then the cooling water flows down along the outer wall surface of the containment through the drain tank and is discharged to the first collection water tank. The bottom of the first collection water tank is provided with a first valve which is normally open. In the case that the first valve is not opened and the containment cooling system is not put into operation, the water collected by the first collection water tank is discharged to the plant floor through the second valve. The second valve is automatically or manually closed once the containment cooling system is commissioned and the pump is commissioned. The first collecting water tank is also provided with an atmospheric pipeline which has an overflow function. In the case where the first valve is closed, the cooling water collected in the first collection water tank overflows. The first collection tank may function to precipitate and collect larger debris impurities in the water stream.
The overflow pipeline behind the first collecting water tank is provided with a first solid-liquid separation device such as a filter screen, and the first solid-liquid separation device further filters impurities in water flow. The further filtered cooling water flows through a heat exchanger such as an air-cooled radiator, and enters a second collection water tank after being cooled. The second collecting water tank is provided with an atmospheric pipeline and a drain pipeline, and a drain valve is arranged on the drain pipeline.
The water outlet pipe arranged at the bottom of the second collecting water tank is connected with the pump. The second collecting water tank is provided with a liquid level meter 17, and a control device such as a PLC (programmable logic controller) controls the start and stop of the pump according to the reading of the liquid level meter. When the second collecting water tank reaches a high liquid level, the pump is started, and when the second collecting water tank reaches a low liquid level, the pump is stopped. A second solid-liquid separation device such as a filter screen is arranged on a pipeline of the second collecting water tank connected with the pump so as to filter impurities in the water flow. The cooling water flow delivered by the pump can be delivered to a water tank for storing the containment cooling water or directly delivered to water distribution equipment, and the purposes are achieved by opening and closing the third valve and the fourth valve.
An additional water supply line may be provided on the second collection tank to allow for additional water supply to the system as evaporation proceeds when insufficient cooling water is available to maintain circulation.
The drain tank to the first collection water tank, the first collection water tank to the heat exchanger, and the heat exchanger to the second collection water tank can be arranged to continuously incline downwards so as to be beneficial to the flow of cooling water under the action of gravity.
It is stated that the present invention is explained by the above embodiments with the detailed structural features, but the present invention is not limited to the above detailed structural features, i.e. the present invention can be implemented only by relying on the above detailed structural features. It should be clear to those skilled in the art that any modifications to the present invention, to the equivalent replacement of selected parts and the addition of auxiliary parts, the selection of specific modes, etc., all fall within the scope of protection and disclosure of the present invention.
The above detailed description describes the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be within the scope of the present invention, and can be right to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (10)
1. A cooling system device of a passive nuclear power station containment is characterized by comprising a water supply and distribution unit arranged above the containment, a drainage tank arranged around the side wall of the containment and a water return unit arranged below the containment;
the water supply and distribution unit comprises a water tank, a first valve and water distribution equipment which are sequentially arranged along the vertical direction;
the water return unit comprises a first water collection tank, a first solid-liquid separation device, a heat exchanger, a second water collection tank, a second solid-liquid separation device and a pump which are arranged in sequence;
the liquid outlet of the drainage tank is connected with the first collecting water tank;
a liquid outlet of the pump is respectively connected with the water tank and the water distribution equipment through a first pipeline and a second pipeline;
and a second valve is arranged at the bottom of the first water collecting tank.
2. The cooling system arrangement for a containment of a passive nuclear power plant according to claim 1, wherein an overflow line is provided on the line between the first collection tank and the first solid-liquid separation device.
3. The cooling system device for the containment of the passive nuclear power station according to claim 1 or 2, wherein the diameter of the filter hole of the first solid-liquid separation equipment is less than or equal to 2 mm;
the diameter of a filter hole of the second solid-liquid separation equipment is less than or equal to 2 mm.
4. The cooling system arrangement for a containment of a passive nuclear power plant according to claim 3, wherein at least 1 pump is provided.
5. The cooling system arrangement for a containment vessel of a passive nuclear power plant as claimed in claim 1 or 4, wherein at least 1 heat exchanger is provided.
6. The cooling system arrangement for a passive nuclear power plant containment according to claim 5, wherein the second collection tank is provided with a level gauge.
7. The cooling system arrangement for a passive nuclear power plant containment vessel as recited in claim 6, wherein the level gauge is connected to the pump via a PLC controller;
a third valve is arranged on the first pipeline;
and a fourth valve is arranged on the second pipeline.
8. The cooling system device for the containment vessel of the passive nuclear power station as claimed in claim 1 or 7, wherein the vertical height of the liquid outlet of the hydrophobic tank to the ground is 10-15 m.
9. The cooling system arrangement for a passive nuclear power plant containment of claim 8, wherein the volume of the first collection tank is less than the volume of the second collection tank.
10. The cooling system arrangement for a containment of a passive nuclear power plant according to claim 9, wherein the volume of the first collection tank is 1m or less 3 ；
The volume of the second collecting water tank is 10-100m 3 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220244168.7U CN217306120U (en) | 2022-01-26 | 2022-01-26 | Cooling system device of passive nuclear power station containment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220244168.7U CN217306120U (en) | 2022-01-26 | 2022-01-26 | Cooling system device of passive nuclear power station containment |
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| CN217306120U true CN217306120U (en) | 2022-08-26 |
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| CN202220244168.7U Active CN217306120U (en) | 2022-01-26 | 2022-01-26 | Cooling system device of passive nuclear power station containment |
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- 2022-01-26 CN CN202220244168.7U patent/CN217306120U/en active Active
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