Suppression pool
By setting a partition plate and a vacuum device in the pressure suppression water tank, the problems of reduced volume of the pressure suppression water tank and insufficient air absorption capacity are solved, and a miniaturized design of the pressure suppression water tank is achieved.
Patent Information
- Application Number
- CN202422544325.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The existing technology lacks an effective solution to reduce the equipment volume of the suppression water tank. Especially in the design of small reactors, it is difficult to enhance the air absorption capacity without increasing the volume.
A partition plate is set in the pressure suppression water pool to separate it into a first space and a second space. The first space is filled with coolant, and the second space is used to absorb air. A vacuum device is connected through an exhaust valve to maintain a vacuum state. A bursting membrane is used to connect the two spaces to relieve pressure when the pressure difference reaches the opening limit.
Without increasing the volume of the pressure suppression pool, the air absorption capacity is enhanced, and the miniaturization design of the pressure suppression pool is achieved.
Smart Images
Figure CN223347516U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of safe utilization of nuclear energy, and more specifically, to a suppression pool. Background Art
[0002] The containment vessel of a nuclear power plant is a crucial barrier to nuclear safety. In the event of an accident, especially a primary or secondary circuit rupture, the release of high-temperature steam containing radioactive aerosols can cause the temperature and pressure within the containment vessel to rise. Therefore, when designing boiling water reactors (BWRs) or small reactors, consideration should be given to discharging the steam-air mixture within the containment vessel into a suppression pool after an accident. This limits the pressure increase within the containment vessel, maintains its integrity, and prevents large-scale release of radioactive aerosols into the atmosphere.
[0003] Since the gas discharged into the suppression tank is a steam-air mixture, the steam condenses into a liquid phase after passing through the cold water, while the air rises into the gas space within the suppression tank. Therefore, the design of the suppression tank requires sufficient gas and water space. Sufficient water space absorbs the latent heat of steam condensation to prevent the water from overheating and causing condensation to fail. Sufficient gas space also serves to dissipate air within the nuclear power plant's containment vessel, preventing excessive pressure in the suppression tank from impacting containment decompression. Therefore, these two optimization areas can be considered when considering a miniaturized suppression tank design.
[0004] Existing technical solutions primarily aim to reduce equipment size through shared use, thereby meeting the need for reactor miniaturization. However, effective solutions for reducing the size of individual equipment, particularly the suppression tank volume, remain lacking. Reducing equipment volume is crucial for small reactor designs, necessitating the design of a miniaturized suppression tank. Utility Model Content
[0005] In response to the problems existing in the prior art, the present application provides a pressure suppression water tank, which optimizes the air space of the pressure suppression water tank to achieve miniaturization of the pressure suppression water tank.
[0006] The technical solution adopted by the present application to solve the technical problem is: constructing a pressure suppression pool, including a pool body, wherein a partition plate is provided in the pool body, and the partition plate divides the pool body into a first space and a second space;
[0007] The first space is filled with a coolant, and the pool body is provided with an air inlet pipe, the air outlet end of the air inlet pipe is connected to the coolant;
[0008] The partition plate is provided with a communication hole, the communication hole being located above the liquid level of the coolant, the communication hole connecting the first space and the second space, and the communication hole being covered with a bursting disk. When the pressure difference between the first space and the second space reaches the opening limit of the bursting disk, the bursting disk opens to connect the first space and the second space;
[0009] The second space is provided with an exhaust valve, and the exhaust valve is connected to a vacuum device through a pipeline. The vacuum device is used to exhaust air from the second space to a vacuum environment and maintain the vacuum state.
[0010] In some embodiments, the air outlet end of the air inlet pipe is connected to a bubbler, and the bubbler is disposed inside the coolant.
[0011] In some embodiments, the bubbler is provided with a plurality of gas outlet holes.
[0012] In some embodiments, the second space is located above the first space.
[0013] In some embodiments, the outer wall of the second space is provided with a first manhole.
[0014] In some embodiments, the outer wall of the first space is provided with a second manhole.
[0015] In some embodiments, the first manhole is located at the top of the second space, the second manhole is located at the top of the first space, and the first manhole and the second manhole are concentrically arranged.
[0016] In some embodiments, the periphery of the bursting disk is fixed to the partition plate by screws.
[0017] In some embodiments, the rupture disk is a composite material disk.
[0018] In some embodiments, the volume of the first space is greater than the volume of the second space.
[0019] The implementation of this application has at least the following beneficial effects: this application divides the pressure suppression water pool into a first space and a second space through a partition plate, wherein the second space is specifically used to absorb the air in the containment vessel of the nuclear power plant. By arranging an exhaust valve on the second space, the exhaust valve is connected to a vacuum pumping device. When the exhaust valve is opened, the vacuum pumping device evacuates the second space to a vacuum environment and maintains the vacuum state. Without increasing the volume of the pressure suppression water pool, the air absorption capacity of the second space is effectively enhanced, thereby realizing the miniaturization of the pressure suppression water pool. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:
[0021] Figure 1 It is a schematic structural diagram of a pressure suppression pool provided in some embodiments of the present application;
[0022] Figure 2 yes Figure 1 A top view of the central pressure reservoir.
[0023] Description of Figure Numbers:
[0024] Pool body 100, first space 101, second space 102, first manhole 103, partition plate 110, communication hole 111, bursting membrane 112, second manhole 113, air inlet pipe 200, bubbler 210, air extraction valve 300, coolant 400. DETAILED DESCRIPTION
[0025] In order to provide a clearer understanding of the technical features, objectives, and effects of the present application, the specific embodiments of the present application are now described in detail with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art may make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0026] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings or the orientation or position relationship in which the product of this application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting this application.
[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "plurality" means at least two, such as two or three, unless otherwise specifically defined.
[0028] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0029] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0030] Figure 1 、 Figure 2 Shown are the suppression water tanks used in some embodiments of the present application.
[0031] like Figure 1 As shown, the present application provides a pressure suppression pool, including a pool body 100, which is preferably configured as a cylinder with a compact structure. A partition plate 110 is provided within the pool body 100, which divides the pool body 100 into a first space 101 and a second space 102, wherein the second space 102 is located above the first space 101 and the volume of the second space 102 is smaller than the volume of the first space 101. The first space 101 is filled with coolant 400, and a space for accommodating air is left between the top of the first space 101 and the liquid level of the coolant 400. The coolant is preferably tap water, which has a large specific heat capacity and is easily accessible. An air inlet pipe 200 is provided on the pool body 100. In this embodiment, the air inlet pipe 200 passes through the second space 102 and the first space 101 in sequence, and the air outlet end of the air inlet pipe 200 is connected to the coolant 400. Furthermore, the outlet end of the air inlet pipe 200 is connected to a bubbler 210, which is disposed within the coolant 400 and has multiple air outlet holes. The air inlet end of the air inlet pipe 200 is connected to the nuclear power plant containment vessel. In the event of an accident, the steam-air mixture within the containment vessel is discharged through the air inlet pipe 200 into the suppression water tank and then into the coolant 400 in the first space 101. The bubbler 210 disperses the steam-air mixture into the coolant 400, thereby cooling the steam-air mixture more quickly and condensing the steam into a liquid phase.
[0032] The partition plate 110 is provided with a connecting hole 111, positioned above the level of the coolant 400. This hole 111 connects the first space 101 and the second space 102. A rupture membrane 112, a composite material membrane with excellent heat and moisture resistance and toughness, is covered on the connecting hole 111. The perimeter of the rupture membrane 112 is fixed to the partition plate 110 with screws. Normally, the rupture membrane 112 seals the connecting hole 111, separating the first space 101 from the second space 102. A vacuum valve 300 is provided in the second space 102, connected to a vacuum pump via a pipe. When the valve 300 is opened, the vacuum pump pumps air from the second space 102 to a vacuum environment and maintains this vacuum state. The first space 101 and the second space 102 are separated by a partition plate 110 and a bursting disc 112. The volume of the second space 102 is smaller than that of the first space 101, allowing the second space 102 to be evacuated and maintained in a vacuum state. When the steam-air mixture within the nuclear power plant's containment vessel is discharged into the first space 101, the steam is cooled to a liquid phase in the coolant 400, while the air rises above the coolant 400 level, increasing the pressure within the first space 101. When the pressure differential between the first space 101 and the second space 102 (the vacuum environment) reaches the opening limit of the bursting disc 112, the bursting disc 112 opens, connecting the first and second spaces 101, 102, through the connecting hole 111. This directly reduces the pressure within the first space 101 and simultaneously allows the gas within the nuclear power plant's containment vessel to enter the suppression water tank for decompression more quickly.
[0033] like Figure 1 and Figure 2 As shown, in some embodiments, a first manhole 103 is provided on the outer wall of the second space 102, and a second manhole 113 is provided on the outer wall of the first space 101. It should be noted that a manhole is an opening with a cover provided to facilitate the passage of maintenance personnel. The first manhole 103 and the second manhole 113 are provided to facilitate personnel entering the suppression tank to inspect and maintain equipment such as the bursting membrane 112 and the bubbler 210. The first manhole 103 is located at the top of the second space 102, and the second manhole 113 is located at the top of the first space 101, and the first manhole 103 and the second manhole 113 are concentrically arranged.
[0034] The pressure suppression pool provided by the present application is used to regularly evacuate the second space 102 by a vacuum pumping device during normal maintenance to ensure the vacuum state of the second space 102; once a breach accident occurs, the temperature and pressure in the containment of the nuclear power plant will rise. In order to suppress the pressure rise in the containment of the nuclear power plant, the steam-air mixed gas in the containment of the nuclear power plant must be discharged into the pressure suppression pool; after the mixed gas enters the pressure suppression pool through the air inlet pipe 200, it enters the coolant 400 through the bubbler 210, and the steam therein is released in the coolant 400. 0, while the air that cannot condense will enter the space between the top of the first space 101 and the liquid level of the coolant 400, causing the air pressure inside the first space 101 to rise; when the pressure difference between the first space 101 and the second space 102 (vacuum environment) reaches the opening limit of the bursting membrane 112, the bursting membrane 112 will open, and the first space 101 and the second space 102 will be directly connected, reducing the pressure in the first space 101, and at the same time allowing the gas in the containment of the nuclear power plant to enter the suppression pool for pressure relief more quickly.
[0035] The present application divides the pressure suppression water pool into a first space 101 and a second space 102 through a partition plate 110, wherein the second space 102 is specifically used to absorb the air in the containment of the nuclear power plant. An air extraction valve 300 is provided on the second space 102, and the air extraction valve 300 is connected to a vacuum pumping device. When the air extraction valve 300 is opened, the vacuum pumping device evacuates the second space 102 to a vacuum environment and maintains the vacuum state. Without increasing the volume of the pressure suppression water pool, the air absorption capacity of the second space 102 is effectively enhanced, thereby realizing the miniaturization of the pressure suppression water pool.
[0036] The above embodiments only express the specific implementation methods of the present application. The descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present application, and several deformations and improvements can be made, which all fall within the scope of protection of the present application. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present application should fall within the scope of coverage of the claims of the present application.
Claims
1. A pressure suppression pool, characterized in that: The invention comprises a pool body (100), wherein a partition plate (110) is provided in the pool body (100), and the partition plate (110) divides the pool body (100) into a first space (101) and a second space (102); The first space (101) is filled with a cooling liquid (400), and the pool body (100) is provided with an air inlet pipe (200), and the air outlet end of the air inlet pipe (200) is connected to the cooling liquid (400); A connecting hole (111) is provided on the partition plate (110). The connecting hole (111) is located higher than the liquid level of the coolant (400). The connecting hole (111) connects the first space (101) and the second space (102). The connecting hole (111) is covered with a bursting membrane (112). When the pressure difference between the first space (101) and the second space (102) reaches the opening limit of the bursting membrane (112), the bursting membrane (112) opens to connect the first space (101) and the second space (102). The second space (102) is provided with an exhaust valve (300), and the exhaust valve (300) is connected to a vacuum device through a pipeline, and the vacuum device is used to exhaust the second space (102) to a vacuum environment and maintain the vacuum state.
2. The pressure suppression pool according to claim 1, characterized in that: The air outlet end of the air inlet pipe (200) is connected to a bubbler (210), and the bubbler (210) is arranged inside the cooling liquid (400).
3. The pressure suppression pool according to claim 2, characterized in that: The bubbler (210) is provided with a plurality of small air outlet holes.
4. The pressure suppression pool according to any one of claims 1 to 3, characterized in that: The second space (102) is located above the first space (101).
5. The pressure suppression pool according to claim 4, characterized in that: The outer wall of the second space (102) is provided with a first manhole (103).
6. The pressure suppression pool according to claim 5, characterized in that: The outer wall of the first space (101) is provided with a second manhole (113).
7. The pressure suppression pool according to claim 6, characterized in that: The first manhole (103) is located at the top of the second space (102), the second manhole (113) is located at the top of the first space (101), and the first manhole (103) and the second manhole (113) are concentrically arranged.
8. The pressure suppression pool according to claim 1, characterized in that: The periphery of the bursting membrane (112) is fixed to the partition plate (110) by screws.
9. The pressure suppression pool according to claim 1, characterized in that: The bursting membrane (112) is a composite material membrane.
10. The pressure suppression pool according to claim 1, characterized in that: The volume of the first space (101) is greater than the volume of the second space (102).