Suppression pool device and nuclear reactor

Abstract

The present invention relates to a pressure suppression pool device and a nuclear reactor, wherein the pressure suppression pool device comprises a shell and at least one hollow pressure suppression tube, wherein a closed cavity and a plurality of partitions for delaying gas flow are arranged in the shell; the cavity is filled with coolant, and the partitions are immersed in the coolant; and a retention space for accommodating gas is arranged above the coolant inside the cavity; the pressure suppression tube penetrates the outer wall of the shell, and comprises an outer shell section located outside the shell, and an inner shell section located inside the shell; the end of the inner shell section is inserted into the coolant, and the outer shell section is connected to the gas in the environment; the pressure suppression pool device belongs to a non-active system, and has high safety and reliability; it has high cooling efficiency and significant pressure suppression effect, and can effectively suppress the increase of containment pressure and temperature under predetermined working conditions; and it has low requirements for space and volume of coolant.

Description

Technical Field

[0001] The invention relates to the field of nuclear power plant safety system equipment design, and in particular to a suppression pool device and a nuclear reactor. Background Art

[0002] The containment is of special importance to the safety of nuclear power plants. It is the last barrier to prevent fission products from fuel and radioactive materials from the primary circuit from entering the environment. When a loss of coolant accident occurs in the reactor coolant system of a nuclear power plant system or a rupture or failure occurs in the steam-water circuit of the secondary circuit, it is necessary to ensure the discharge of core heat and the integrity of the containment to limit the development of the accident and mitigate the consequences of the accident. For this purpose, nuclear power plants are equipped with special safety facilities.

[0003] In the prior art, for example, a suppression water pool system is used as a safety facility in some reactors, or a containment spray system is used as a safety facility for the containment. However, in the current design of the suppression water pool system, the steam condensation effect of the suppression water pool is average, resulting in the gas mixture entering the gas space of the suppression water pool still containing a lot of steam and a high temperature, resulting in the need for a larger gas space and cooling water volume to complete the cooling of the steam. The containment spray system still has disadvantages. Its startup needs to rely on the active operation of the spray water pump, and it must rely on an external power supply to ensure the operation of the system, and the safety factor is low. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a suppression water pool device and a nuclear reactor.

[0005] The technical solution adopted by the present invention to solve the technical problem is: construct a pressure suppression pool device, including a shell and at least one hollow pressure suppression tube, the shell is provided with a closed cavity and a plurality of baffles for delaying the flow of gas; the cavity is filled with a coolant, the baffles are immersed in the coolant; and a retention space for accommodating the gas is provided above the coolant in the cavity;

[0006] The pressure suppression tube passes through the outer wall of the shell, and includes an outer shell section located outside the shell, and an inner shell section located inside the shell; an end of the inner shell section is inserted into the coolant, the outer shell section is connected to the gas in the environment, and under predetermined operating conditions, the gas enters the coolant through the inner shell section for cooling.

[0007] Preferably, at least one end of any partition is fixedly connected to the inner wall of the shell, and a passage for the gas to flow to the retention space is reserved between at least the other end of the partition and the adjacent inner wall of the shell.

[0008] Preferably, any two adjacent partitions are arranged at intervals along the flow direction of the gas.

[0009] Preferably, any two adjacent partitions are respectively fixed on opposite sides of the inner side wall of the shell.

[0010] Preferably, the partition has a wavy longitudinal section, and is provided with a plurality of groove flow channels for limiting the gas from aggregating into large bubbles.

[0011] Preferably, the partition forms a set angle with the liquid surface of the coolant; the angle is 5°-10°.

[0012] Preferably, the shell is further provided with at least one supporting column for supporting the partition, one end of the supporting column is fixedly connected to the inner wall of the shell, and the other end thereof passes through the partition and is fixedly connected thereto.

[0013] Preferably, the shell is also provided with an outlet pipe connecting the retention space and the environment, and a valve arranged on the outlet pipe, and the opening and closing of the valve is controlled according to the atmospheric pressure of the environment and the retention space to discharge the gas in the retention space.

[0014] Preferably, the inner shell section includes a vertical section and a transverse section immersed in the coolant, the first end of the vertical section is connected to an end of the outer shell section adjacent to the shell, the second end of the vertical section passes through the retention space and is connected to the transverse section, and the transverse section is provided with an outlet for discharging the gas into the coolant.

[0015] Preferably, the two axial ends of the transverse section are sealed; and the air outlet includes a plurality of exhaust holes respectively provided on the circumferential outer wall of the transverse section and / or at the two axial ends thereof.

[0016] Preferably, the partition plate is provided with a plurality of groove flow channels for limiting the gas from aggregating into large bubbles; the axial extension direction of the transverse section is perpendicular to the axial extension direction of the groove flow channels.

[0017] The present invention also constructs a nuclear reactor, including a containment shell and a steam pipe arranged in the containment shell. The containment shell is also provided with the above-mentioned pressure suppression pool device, and the outer shell section of the pressure suppression pool device is connected to the gas inside the containment shell.

[0018] The implementation of the present invention has the following beneficial effects: the pressure suppression pool device in the present invention can suppress the increase of pressure and temperature of the containment vessel by using only simple structures such as a shell, a pressure suppression tube, a coolant and a baffle, and the manufacturing process is simple and the cost is low; and a retention space is provided in the shell to automatically inhale the gas from the environment by using the pressure difference effect, which is a passive system and does not require active energy input, and has high safety and reliability; in addition, the provision of the baffle effectively improves the cooling efficiency and enhances the pressure suppression effect, which can reduce the ground air space and cooling water volume requirements of conventional pressure suppression pools, thereby reducing the difficulty of construction and design and improving the economy of nuclear power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 It is a schematic structural diagram of the pressure suppression pool device of the present invention;

[0021] Figure 2 It is a schematic diagram of a circuitous flow channel in the pressure suppression pool device of the present invention;

[0022] Figure 3 It is a schematic structural diagram of a baffle in a pressure suppression pool device of the present invention;

[0023] Figure 4 It is a schematic longitudinal section diagram of a partition in the pressure suppression pool device of the present invention. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0025] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] In a nuclear power plant system, when a loss of coolant system occurs in the reactor or the steam-water circuit of the secondary circuit ruptures or fails, it is necessary to ensure the discharge of core heat and the integrity of the containment to limit the development of the accident and mitigate its consequences. For this purpose, special safety facilities are set up in nuclear power plants.

[0027] Therefore, the present invention creates a pressure suppression pool device that can be used in the internal environment of the containment, and can quickly and effectively suppress the rise of pressure and temperature of the containment under predetermined conditions when a high-temperature and high-pressure gas pipeline ruptures, so as to protect the internal environment of the containment. Of course, it can also be used in other environments that require rapid processing of high-temperature and high-pressure gases.

[0028] like Figure 1-Figure 4 As shown, a pressure suppression pool device in the present invention includes a shell 1 and at least one hollow pressure suppression tube 2. The shell 1 is provided with a closed cavity and a plurality of partitions 3 for delaying the flow of gas; the cavity is filled with a coolant 11, and the partitions 3 are immersed in the coolant 11; and a retention space 12 for accommodating gas is provided above the coolant 11 inside the cavity.

[0029] It can be understood that the pressure suppression pool device can be set at any place with appropriate space inside the containment, preferably around the steam-water circuit, so that the pressure suppression pool device can act on the predetermined working condition at the first time. The shell 1 can be a regular rectangular, ring-shaped, cylindrical or polyhedral irregular shape, as long as it meets a certain structural strength. The shell 1 is provided with a closed cavity and a plurality of baffles 3 for delaying the flow of gas, and the baffles 3 are fixedly connected to the inner wall of the shell 1; the cavity is loaded with coolant 11, and the cavity is provided with a retention space 12 for accommodating gas above the coolant 11.

[0030] Further, the coolant 11 in the shell 1 needs to be filled in advance before the reactor is operated. The filling method can be a liquid port (not shown in the figure) opened on the side wall or bottom wall of the shell 1 and a switch (not shown in the figure) for controlling the opening and closing of the liquid port. When the coolant 11 needs to be filled, the liquid port is opened by the switch, and the liquid port is closed after the filling is completed to ensure that the cavity in the shell 1 is sealed. The coolant 11 divides the space in the cavity into a gas space, that is, a retention space 12 and a liquid space. The gas space is located above the liquid space. Initially, the temperature and pressure of the gas space are roughly the same as the internal environment of the containment. It should be noted that the gas contained in the retention space 12 can be a gas in the atmosphere, or a mixture of a gas in the atmosphere and a gas sucked from the containment. The volume of the shell 1 and its cavity, and the coolant 11 can be set according to the design characteristics of different reactors, and matched with the maximum breach diameter of the reactor, the water loading of the first and second circuits, the operating temperature and pressure and other key parameters. Optionally, the coolant 11 can be water.

[0031] The suppression water tank device is installed in the containment, and is connected to the atmospheric environment of the containment and the internal space of the shell 1 through the suppression pipe 2; under predetermined working conditions, the gas in the containment enters the coolant 11 through the suppression pipe 2 for cooling. The predetermined working condition refers to the atmospheric pressure in the containment being greater than the pressure of the retention space 12 in the shell 1; specifically, when the primary side pipeline or the secondary side pipeline of the containment nuclear island system ruptures, high-temperature and high-pressure steam is rapidly released from the rupture into the internal environment of the containment, and the space pressure rises rapidly, and a certain pressure difference is generated between the atmosphere in the containment and the gas space in the suppression water tank device. At this time, the atmosphere in the containment is greater than the pressure of the gas space. Due to the pressure difference effect, the mixed gas in the containment, such as steam and non-condensable gas, quickly enters the liquid space of the suppression water tank through the suppression pipe 2, so that the steam contacts the water and quickly condenses into water, thereby reducing the pressure in the containment.

[0032] Understandably, if Figure 1As shown, the pressure suppression tube 2 is hollow inside, and is provided with a vent at one end of the containment internal environment, and is provided with an outlet at the other end of the containment coolant 11; the pressure suppression tube 2 passes through the outer wall of the shell 1, and the pressure suppression tube includes an outer shell section 21 located outside the shell 1, and an inner shell section 22 located inside the shell 1; the end of the inner shell section 22 is inserted into the coolant 11, the outer shell section 21 is connected to the gas in the environment, and the gas enters the coolant 11 through the inner shell section 22 for cooling. In this embodiment, the pressure suppression tube 2 is a hollow strip-shaped circular tube, and the inner shell section 22 includes a vertical section 221 and a transverse section 222 immersed in the coolant 11. The first end of the vertical section 221 is connected to one end of the outer shell section 21 adjacent to the outer wall of the shell 1, and the second end of the vertical section 221 passes through the retention space 12 and is connected to the transverse section 222. The transverse section 222 is provided with an outlet, and the gas can enter from the outer shell section 21, pass through the vertical section 221, and discharge the gas into the coolant 11 from the outlet of the transverse section 222.

[0033] It can be understood that the connection between the outer shell section 21 and the vertical section 221 can be threaded connection, welding or integral molding; in this embodiment, the outer shell section 21 and the vertical section 221 are partial structures of the same hollow pipe at different positions. The extension direction of the outer shell section 21 is the same as the axial direction of the shell 1, the extension direction of the vertical section 221 is the same as that of the outer shell section 21, the extension direction of the transverse section 222 is perpendicular to the vertical section 221, and the transverse section 222 is fixedly connected to the vertical section 221, and the fixed connection method can be welding, bonding or threaded connection. It should be noted that the specific structure of the outer shell section 21, the vertical section 221 and the transverse section 222 is only a specific embodiment of the present invention. In fact, the shape and extension direction of the pressure suppression tube 2 can be changed according to the actual working conditions. For example, the extension direction of the part of the inner shell section 22 immersed in the coolant 11 can be set to a winding extension, and the cooling effect can be enhanced by lengthening the time for the gas to pass through the pipeline. The gas outlet of the transverse section 222 can be the openings at the two axial ends of the transverse section 222 on its pipeline, or can be a plurality of exhaust holes 2221 respectively provided on the circumferential outer wall of the transverse section 222 and / or at its two axial ends; in the present embodiment, in order to allow the gas in the containment to be sufficiently cooled, the two axial ends of the transverse section 222 are sealed, and a plurality of exhaust holes 2221 arranged at intervals are provided on the circumferential outer wall of the transverse section 222 and / or at its two axial ends (the exhaust holes 2221 provided at the two axial ends of the transverse section 222 are not shown in the figure); preferably, the aperture is between 1 cm and 2 cm, and the center distance between adjacent exhaust holes 2221 is equal to twice the aperture; the total area of ​​the exhaust holes 2221 is greater than 1.5 times the flow area of ​​the outer shell section 21 and the vertical section 221.

[0034] During installation, the suppression tube 2 should be inserted as deep as possible into the coolant 11. In this embodiment, the suppression tube 2 is inserted to the bottom of the suppression pool, lower than the bottom corrugated baffle 3, and the axial extension direction of the transverse section 222 is perpendicular to the axial extension direction of the groove flow channel 31 of the baffle 3, so that the ejected gas is distributed in more groove flow channels 31. Under normal circumstances, since the pressure of the air space in the suppression pool is equal to the pressure of the air space in the containment, the liquid level in the suppression tube 2 will be level with the liquid level in the pool. Parameters such as the number of suppression tubes 2 and the inner diameter of the groove flow channel 31 can be set according to specific reactor parameters.

[0035] like Figure 1 As shown, in order to allow the gas in the containment to be fully cooled in the pressure suppression pool device, a baffle 3 is arranged in the shell 1 and immersed in the coolant 11. When the gas in the environment enters the coolant 11 through the pressure suppression pipe 2, the baffle 3 can play a role in preventing the gas from rising, so as to achieve the purpose of fully cooling the gas. Further, at least one end of any baffle 3 is fixedly connected to the inner wall of the shell 1, and a passage for gas to pass to the retention space 12 is left between at least the other end of the baffle 3 and the inner wall of the shell 1 adjacent to it. In this embodiment, the edge of the baffle 3 fits the inner wall of the shell 1, and the edge is fixedly connected to the inner wall of the shell 1, and the fixing method can be welding, bonding or fixed connection through a connecting piece; the baffle 3 leaves a distance for gas to pass to the retention space 12 between the opposite side of the edge connected to the shell 1 and the inner wall of the adjacent shell 1, and the distance between the two can be kept about 20cm. At the same time, in order to prevent the gas from accumulating into large bubbles during the rising process, the partition 3 is installed so as to be inclined relative to the surface of the coolant 11, and the partition 3 forms a set angle with the liquid surface of the coolant 11; the angle is 5°-10°.

[0036] Furthermore, any two adjacent partitions 3 are arranged at intervals along the flow direction of the gas; any two adjacent partitions 3 are fixed to opposite sides of the inner wall of the shell 1. It can be understood that Figure 2 As shown, in the pressure suppression pool device, the transverse section 222 of the pressure suppression tube 2 is placed below the bottom partition 3, and the partitions 3 are arranged upward from the bottom of the shell 1. In any two adjacent partitions 3, the lowest point of the upper partition 3 is higher than the highest point of the lower partition 3, thereby forming a circuitous ascending flow channel. The more partitions 3 there are, the longer the length of the circuitous ascending flow channel is, the longer the gas flows in the liquid space, and the more obvious the cooling effect is. Therefore, the number of partitions 3 can be appropriately increased, and 4-6 partitions 3 are preferably set up. Preferably, any two adjacent partitions 3 are arranged equidistantly along the flow direction of the gas. In addition, it is necessary to ensure that the top-layer partition is also immersed below the liquid level of the coolant 11.

[0037] Preferably, the partition 3 is made of a stainless steel plate structure, which prevents the partition 3 from rusting on the basis of ensuring structural strength, and also has the function of heat dissipation. The partition 3 is also provided with a plurality of groove flow channels 31 for limiting the gas aggregation into large bubbles. It can be understood that, if Figure 4 As shown, the longitudinal section of the partition 3 is wavy; wherein the wavy design forms a plurality of parallel groove flow channels 31 on the partition 3, which can, on the one hand, enhance the overall rigidity of the partition 3 and prevent deformation; on the other hand, it can prevent the gas discharged from the pressure suppression tube 2 from aggregating into large bubbles under the partition 3, thereby reducing the contact area between the gas and the coolant 11; in addition, the contact area between the gas and the partition 3 is increased, which is beneficial to transfer the energy of the gas to the partition 3 and to the cooling of the gas. Preferably, the axial extension direction of the transverse section 222 of the pressure suppression tube 2 is perpendicular to the axial extension direction of the groove flow channel 31, so that the ejected gas is distributed in more corrugated flow channels. Optionally, the groove flow channel 31 is parallel to the upward tilt direction of the partition 3.

[0038] like Figure 3 As shown, in order to allow the pressure suppression tube 2 to pass through the partition 3 and be inserted directly from the top of the shell 1 to the bottom of the shell 1, a plurality of pressure suppression tube through holes 32 are also provided on the partition 3, and the size, quantity and position of the pressure suppression tube 2 match the vertical section 221 in the pressure suppression tube 2. In addition, at least one support column 4 for supporting the partition 3 is also provided in the shell 1, and the partition 3 is also provided with support column through holes 33 corresponding to the number and size of the support columns 4. One end of the support column 4 is fixedly connected to the inner wall of the shell 1, and the other end thereof passes through the partition 3 and is fixedly connected thereto. It can be understood that the support column 4 is a cylindrical stainless steel column, which stands vertically at the bottom of the shell 1 and plays the role of supporting and fixing the partition 3. The bottom of the support column 4 is fixed to the bottom wall of the shell 1 by welding or other fixing methods; the top of the support column 4 can be fixedly connected to the top wall of the shell 1, or suspended in the shell 1; the support column 4 is fixedly connected to the contact edge of the support column through hole 33 of the partition 3, and the connection method can be screwing, bonding or welding.

[0039] like Figure 1As shown, the shell 1 is also provided with an outlet pipe 5 connecting the retention space 12 and the environment, and a valve 6 arranged on the outlet pipe 5. The opening and closing of the valve 6 is controlled according to the atmospheric pressure of the environment and the retention space 12 to discharge the gas in the retention space 12. It can be understood that under the predetermined working condition, when the pressure of the air space of the suppression water tank device is higher than a certain value of the atmospheric pressure of the containment, the valve 6 can be automatically opened to achieve the connection between the air space of the suppression water tank and the atmospheric space of the containment, and prevent the water in the suppression water tank from flowing back into the containment environment through the suppression pipe 2. In other cases, the valve is in a closed isolation state. The valve 6 may include a pressure relief valve or a burst valve, or it may be a valve 6 connected to a pressure sensor; wherein the pressure sensor is placed inside the shell 1, and when the pressure of the air space of the suppression water tank device is higher than the first preset value of the atmospheric pressure of the containment, the valve 6 can be controlled to open automatically until the pressure of the air space of the suppression water tank device is lower than the second preset value of the atmospheric pressure of the containment, and then closed.

[0040] The pressure suppression pool device works as follows:

[0041] When a high-temperature pipeline in the reactor ruptures in the containment, a large amount of high-temperature and high-pressure water vapor enters the atmosphere of the containment, causing the ambient pressure to rise and become higher than the pressure in the air space of the pressure suppression tank device. At this time, due to the pressure difference effect, the outer shell section 21 of the pressure suppression tube 2 inhales the mixed gas in the containment, and discharges it to the bottom of the bottom partition 3 in the pressure suppression tank through the exhaust hole 2221 of the transverse section 222. Under the action of gas buoyancy, the gas flows obliquely upward along the groove flow channel 31 of the partition 3, and slowly upwards in the circuitous ascending flow channel formed between the multiple layers of partitions 3, and finally floats to the level of the coolant 11 through the gap between the highest point of the top partition 3 and the inner wall of the shell 1, and then enters the air space. The schematic diagram of the circuitous flow channel is shown in Figure 2 shown.

[0042] During the circuitous upward flow of the bubbles, they are gradually cooled by the coolant 11 and the partition 3, and finally the water vapor in the gas mixture is condensed and stays in the liquid space, and finally only the non-condensable gas with a lower temperature enters the gas space of the pressure suppression pool. When the liquid space in the shell 1 occupies too high a proportion of the volume of the shell 1, part of the liquid can be discharged through the liquid opening opened on the side wall or bottom wall of the shell 1.

[0043] The inclined partition 3 slows down the speed of gas floating up and increases the distance of gas moving in the liquid space, thereby greatly increasing the contact time between gas and coolant 11, improving the gas cooling efficiency and water vapor condensation ratio, and reducing the temperature of non-condensable gas entering the gas space and the water vapor ratio. Based on these advantages, the volume of the gas space and liquid space of the pressure suppression pool device can be smaller than that of a conventional pressure suppression pool, and the construction cost is lower.

[0044] Based on the same general concept, the present invention also constructs a nuclear reactor, including a containment and a steam pipe arranged in the containment, characterized in that the containment is also provided with the above-mentioned suppression water pool device, and the outer shell section 21 of the suppression water pool device is connected to the gas inside the containment.

[0045] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. 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 invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A pressure suppression pool device, characterized in that: The invention comprises a shell (1) and at least one hollow pressure suppression tube (2); the shell (1) is provided with a sealed cavity and a plurality of baffles (3) for delaying the flow of gas; the cavity is filled with a cooling liquid (11), the baffles (3) are immersed in the cooling liquid (11); and a retention space (12) for accommodating the gas is provided above the cooling liquid (11) in the cavity; The pressure suppression tube (2) penetrates the outer wall of the shell (1), and the pressure suppression tube (2) comprises an outer shell section (21) located outside the shell (1), and an inner shell section (22) located inside the shell (1); an end of the inner shell section (22) is inserted into the coolant (11), the outer shell section (21) is connected to the gas in the environment, and under predetermined working conditions, the gas enters the coolant (11) through the inner shell section (22) to be cooled; At least one end of any of the partitions (3) is fixedly connected to the inner wall of the shell (1), and a passage for the gas to flow into the retention space (12) is left between at least the other end of the partition (3) and the adjacent inner wall of the shell (1); and a plurality of grooved flow channels (31) are provided on the partition (3) for limiting the aggregation of the gas into large bubbles.

2. The pressure suppression pool device according to claim 1, characterized in that: Any two adjacent partitions (3) are arranged at intervals along the flow direction of the gas.

3. The pressure suppression pool device according to claim 1, characterized in that: Any two adjacent partitions (3) are respectively fixed to opposite sides of the inner side wall of the shell (1).

4. The pressure suppression pool device according to claim 1, characterized in that: The partition (3) has a wavy longitudinal section.

5. The pressure suppression pool device according to claim 1, characterized in that: The partition plate (3) forms a set angle with the liquid surface of the cooling liquid (11); the angle is 5°-10°.

6. The pressure suppression pool device according to claim 1, characterized in that: The shell (1) is further provided with at least one support column (4) for supporting the partition (3); one end of the support column (4) is fixedly connected to the inner wall of the shell (1), and the other end thereof passes through the partition (3) and is fixedly connected thereto.

7. The pressure suppression pool device according to claim 1, characterized in that: The housing (1) is further provided with an outlet pipe (5) connecting the retention space (12) and the environment, and a valve (6) provided on the outlet pipe (5), and the opening and closing of the valve (6) is controlled according to the atmospheric pressure of the environment and the retention space (12) to discharge the gas in the retention space (12).

8. The pressure suppression pool device according to claim 1, characterized in that: The inner shell section (22) comprises a vertical section (221) and a transverse section (222) immersed in the cooling liquid (11); a first end of the vertical section (221) is connected to an end of the outer shell section (21) adjacent to the shell body (1); a second end of the vertical section (221) passes through the retention space (12) and is connected to the transverse section (222); and the transverse section (222) is provided with an outlet for discharging the gas into the cooling liquid (11).

9. The pressure suppression pool device according to claim 8, characterized in that: The two axial ends of the transverse section (222) are sealed; and the air outlet comprises a plurality of exhaust holes (2221) respectively provided on the circumferential outer wall of the transverse section (222) and / or at its two axial ends.

10. A nuclear reactor, comprising a containment shell and a steam pipe arranged in the containment shell, characterized in that: The containment vessel is also provided with a suppression water pool device as described in any one of claims 1 to 9, and the outer shell section (21) of the suppression water pool device is connected to the gas inside the containment vessel.

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