CN214377692U - Passive containment cooling system with gas storage device - Google Patents
Passive containment cooling system with gas storage device Download PDFInfo
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- CN214377692U CN214377692U CN202022620638.9U CN202022620638U CN214377692U CN 214377692 U CN214377692 U CN 214377692U CN 202022620638 U CN202022620638 U CN 202022620638U CN 214377692 U CN214377692 U CN 214377692U
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- valve
- containment cooling
- passive containment
- storage device
- gas storage
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model discloses an active containment cooling system of non-with gas storage device, its characterized in that: the passive containment cooling water tank is characterized by comprising a passive containment cooling water tank, wherein a water outlet pipe of the passive containment cooling water tank is over against a containment, and a plurality of groups of valves are arranged on the water outlet pipe of the passive containment cooling water tank in parallel; the valve comprises an isolation valve and a switch valve which are sequentially connected in series from the water tank body to the water outlet direction, wherein the switch valve comprises a pneumatic valve, and a gas storage device is arranged on a gas supply pipeline of the pneumatic valve and used for maintaining compressed air supply of the pneumatic valve under the working condition that compressed air is lost. The utility model adopts the configuration of three groups of valves, which has multiplicity and diversity, and can ensure the normal operation of the system when opening any group of valves, thereby avoiding common mode faults; the pneumatic valve is additionally provided with the gas storage bottle and the check valve, so that the pneumatic valve cannot be opened by mistake due to loss of compressed air supply under the working conditions of station blackout and the like, and the false start probability of the passive containment cooling system is reduced.
Description
Technical Field
The utility model relates to a passive containment cooling system with gas storage device.
Background
In passive nuclear power plants such as AP1000, CAP1400 and the like, the steel containment vessel is used as a heat transfer interface, and the passive containment vessel cooling system is used for leading out heat in the steel containment vessel and reducing the pressure and temperature in the steel containment vessel under the accident of abnormal rise of the pressure and temperature in the containment vessel. Steam generated in the steel containment vessel is cooled on the inner wall surface of the steel containment vessel, condensed water flows back to the bottom of the steel containment vessel, and the outer wall surface of the steel containment vessel is drained to a water film formed on the steel containment vessel through the gravity of a passive containment vessel cooling water tank for cooling.
The scheme is realized by arranging a valve on an outlet pipe of the passive containment cooling water tank, and a mode of adding an air-operated valve by using an electric isolation valve is generally adopted. The electric isolation valve and the pneumatic valve are automatically opened when the pressure in the steel containment reaches a certain set value or the temperature reaches a certain set value, the passive containment cooling system is started, heat in the steel containment is led out in a passive mode, the pressure and the temperature of the steel containment are reduced, the integrity of a third safety barrier is maintained, and the release of radioactive substances under the accident condition is limited.
In order to achieve the purpose, the minimum water content of the passive containment cooling water tank needs to meet certain requirements so as to meet the water consumption of the passive containment cooling system in 72 hours of normal operation, namely, in 72 hours, workers do not need to supplement cooling water for the passive containment cooling water tank. For various reasons, if the passive containment cooling system is started by mistake, a worker should close the valve to stop unnecessary discharge of cooling water in the passive containment cooling water tank.
The pneumatic valve consists of two parts, namely a preposed electromagnetic valve and a main valve. The main valve is opened when the compressed air supply is lost; the front electromagnetic valve is powered by a direct current power supply, and the electromagnetic valve is closed when the power supply is lost, and the compressed air supply of the main valve is cut off. In summary, for the pneumatic valve, whether the direct current power supply or the compressed air supply is lost, the two valves are opened, and the passive containment cooling system is started.
Under the working conditions of station blackout and the like, the compressed air supply of the power plant is lost within a few minutes, the pneumatic valve is opened due to the loss of the compressed air supply, and the passive containment cooling system is started. However, at this time, because a large amount of steam is not generated in the steel containment vessel, the pressure and the temperature in the steel containment vessel are low, the passive containment vessel cooling system does not need to be started, and according to estimation, the passive containment vessel cooling system needs to be started after about two hours. In order to avoid the loss of cooling water in the passive containment cooling water tank, a worker is required to manually close related valves remotely at the moment, and the operation of the passive containment cooling system is stopped.
However, if the pneumatic valve is opened due to the power failure of the whole plant, the valve cannot be closed due to the loss of the compressed air supply, and the passive containment cooling system can be stopped only by manually closing the electric isolation valve remotely. Under the whole plant outage working condition, the electric isolation valve is powered by the storage battery. When the pressure or the temperature in the steel containment vessel rises to a certain set value, the electric isolation valve is opened, the passive containment vessel cooling system is automatically started, and the heat in the steel containment vessel is led out.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the conventional passive containment cooling system needs to manually close the electric isolation valve after power failure so as to prevent the passive containment cooling system from being started by mistake.
In order to solve the problem, the technical scheme of the utility model provides a passive containment cooling system with gas storage device, its characterized in that: the passive containment cooling water tank is characterized by comprising a passive containment cooling water tank, wherein a water outlet pipe of the passive containment cooling water tank is over against a containment, and a plurality of groups of valves are arranged on the water outlet pipe of the passive containment cooling water tank in parallel; the valve comprises an isolation valve and a switch valve which are sequentially connected in series from the water tank body to the water outlet direction, wherein the switch valve comprises a pneumatic valve, and a gas storage device is arranged on a gas supply pipeline of the pneumatic valve and used for maintaining compressed air supply of the pneumatic valve under the working condition that compressed air is lost.
Preferably, the gas storage means comprises a gas cylinder and a check valve.
Preferably, the isolation valve is an electrically operated isolation valve.
Preferably, the valves have three groups, two groups of the valves are serially connected electric isolation valves and pneumatic valves, the other group of the valves is serially connected electric isolation valves and electric valves, the electric isolation valves are in a normally open state, and the pneumatic valves and the electric valves are in a normally closed state.
Preferably, the pneumatic valve comprises a pressure reducing valve, a preposed electromagnetic valve and a main valve which are connected through an air supply pipeline, the air storage device is arranged between the pressure reducing valve and the main valve, and compressed air sequentially passes through the pressure reducing valve, the air storage device and the preposed electromagnetic valve through the air supply pipeline and reaches the main valve.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model adopts the configuration of three groups of valves, which has multiplicity and diversity, and can ensure the normal operation of the system when opening any group of valves, thereby avoiding common mode faults; through add gas bomb and check valve on the pneumatic valve, under the operating mode such as whole factory outage, the pneumatic valve will not be opened because of losing compressed air supply mistake, and passive containment cooling system mistake start probability reduces, and the necessity that needs the staff to intervene reduces, has reduced the possibility of human error.
Drawings
Fig. 1 is a schematic structural view of a passive containment cooling system with a gas storage device according to the present invention;
fig. 2 is a schematic view of the pneumatic valve structure.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in figure 1, the utility model relates to a passive containment cooling system with gas storage device, including passive containment cooling water tank 1, pneumatic valve 2, electronic isolation valve 3 and motorised valve 4. The water outlet pipe of the passive containment cooling water tank 1 is opposite to the containment 5, three groups of valves are arranged on the water outlet pipe in parallel, two groups are an electric isolation valve 3 and a pneumatic valve 2 which are connected in series, the other group is an electric isolation valve 3 and an electric valve 4 which are connected in series, the electric isolation valve 3 is in a normally open state, and the pneumatic valve 2 and the electric valve 4 are in a normally closed state. The configuration of three groups of valves has multiplicity and diversity, has avoided common mode trouble, opens arbitrary a set of valve and can guarantee the normal operating of system.
The pneumatic valve 2 comprises a pressure reducing valve 22, a preposed electromagnetic valve 23 and a main valve 24 which are connected through a gas supply pipeline, a gas storage device is arranged on the gas supply pipeline of the pneumatic valve 2, the gas storage device comprises a gas storage bottle 21 and a check valve 25 and is arranged between the pressure reducing valve 22 and the main valve 24, and compressed air sequentially passes through the pressure reducing valve 22, the check valve 25, the gas storage bottle 21 and the preposed electromagnetic valve 23 through the gas supply pipeline and reaches the main valve 24.
As shown in fig. 2, by providing a gas cylinder 21 and a check valve 25 on the gas supply line of the air-operated valve 2. Under the working conditions of power outage of the whole plant and the like, after the compressed air supply of the power plant is lost, the air storage bottle 21 maintains the compressed air supply of the pneumatic valve 2 for a period of time (not less than 2 hours), so that the pneumatic valve 2 cannot be opened due to the loss of the compressed air supply, the passive containment cooling system is not triggered by mistake, a worker is not required to manually close the electric isolation valve 3, and the operation of the passive containment cooling system is stopped.
Claims (5)
1. The utility model provides a passive containment cooling system with gas storage device which characterized in that: the passive containment cooling water tank comprises a passive containment cooling water tank (1), wherein a water outlet pipe of the passive containment cooling water tank (1) is over against a containment (5), and a plurality of groups of valves are arranged on the water outlet pipe of the passive containment cooling water tank (1) in parallel; the valve comprises an isolation valve and a switch valve which are sequentially connected in series from the water tank body to the water outlet direction, the switch valve comprises a pneumatic valve (2), and a gas storage device is arranged on a gas supply pipeline of the pneumatic valve (2) and used for maintaining compressed air supply of the pneumatic valve (2) under the working condition that compressed air is lost.
2. The passive containment cooling system with a gas storage device according to claim 1, wherein: the gas storage device comprises a gas storage bottle (21) and a check valve (25).
3. The passive containment cooling system with a gas storage device according to claim 1, wherein: the isolation valve is an electric isolation valve (3).
4. The passive containment cooling system with a gas storage device according to claim 1, wherein: the valve has three groups, wherein two groups are electric isolating valves (3) and pneumatic valves (2) which are connected in series, and the other group is electric isolating valves (3) and electric valves (4) which are connected in series, the electric isolating valves (3) are in a normally open state, and the pneumatic valves (2) and the electric valves (4) are in a normally closed state.
5. The passive containment cooling system with a gas storage device according to claim 1, wherein: pneumatic valve (2) are including relief pressure valve (22), leading solenoid valve (23) and main valve (24) through the air supply line connection, air storage device establishes between relief pressure valve (22) and main valve (24), and compressed air passes through relief pressure valve (22), air storage device, leading solenoid valve (23) in proper order through the air supply line and reaches main valve (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022620638.9U CN214377692U (en) | 2020-11-12 | 2020-11-12 | Passive containment cooling system with gas storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022620638.9U CN214377692U (en) | 2020-11-12 | 2020-11-12 | Passive containment cooling system with gas storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214377692U true CN214377692U (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022620638.9U Active CN214377692U (en) | 2020-11-12 | 2020-11-12 | Passive containment cooling system with gas storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214377692U (en) |
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2020
- 2020-11-12 CN CN202022620638.9U patent/CN214377692U/en active Active
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