Reactor containment and residual heat removal system

Abstract

The utility model discloses a reactor containment and residual heat removal system, the reactor containment comprises: an inner shell, an outer shell, and a water curtain forming assembly for removing residual heat in the inner shell, the outer shell is sleeved on the periphery of the inner shell, the water curtain forming assembly surrounds and is fixedly installed on the outer wall of the inner shell, and the water curtain forming assembly is fixedly installed on the outer wall of the inner shell. A storage cavity for containing cooling water is formed between the inner shell and the water curtain forming assembly. The water curtain forming assembly comprises a partition piece and a drainage piece, the drainage piece or the partition piece is fixedly installed on the inner shell, the partition piece is connected with the drainage piece, the top end of the partition piece is arranged to be horizontal, and the bottom end of the drainage piece makes contact with the outer wall of the inner shell. The manufacturing cost is saved, damage is not prone to occurring in the cooling process, the safety in the using process is guaranteed, the cooling effect is improved, the temperature and pressure reduction speed is high, heat conduction is more uniform, the heat dissipation capacity is better, the utilization rate of cooling water is increased, and the use amount of the cooling water is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear reactor technical field especially relates to a reactor containment vessel and residual heat removal system. BACKGROUND

[0002] Containment system is the shell of reactor primary loop system and emergency safety facilities. It is the fourth safety barrier of nuclear power plant. To prevent radioactive material from spreading outside, even in the most serious accident, radioactive material can still be completely enclosed in the inside without affecting the surrounding environment.

[0003] Containment is usually a spherical top cylindrical large shell. In addition, there are spherical and cylindrical structure containment. The inner layer of containment is usually sealed steel shell, and the outer layer is prestressed concrete or reinforced concrete.

[0004] The containment of some prior art technologies is cooled, and the surface cooling water is prone to flow down in the form of water column, resulting in slow cooling and pressure reduction speed, uneven heat conduction, waste of cooling water usage rate and increased cooling water usage amount. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to provide a reactor containment vessel and residual heat removal system.

[0006] The utility model adopts the technical scheme to solve the technical problem: a reactor containment vessel is constructed, which comprises: an inner shell body and an outer shell body, and a water curtain forming assembly for removing residual heat in the inner shell body, the outer shell body is sleeved on the periphery of the inner shell body, the water curtain forming assembly is fixedly installed around the outer wall of the inner shell body, and a storage cavity containing cooling water is arranged between the inner shell body and the water curtain forming assembly.

[0007] The water curtain forming assembly comprises: a blocking piece and a flow guide piece, the flow guide piece or the blocking piece is fixedly installed on the inner shell body, the blocking piece and the flow guide piece are connected with each other, the top end of the blocking piece is arranged horizontally, and the bottom end of the flow guide piece is in contact with the outer wall of the inner shell body.

[0008] Further, the blocking piece is fixedly installed on the inner shell body, the cross section of the blocking piece is in arc shape, and the flow guide piece is obliquely installed between the blocking piece and the inner shell body.

[0009] Further, the flow guide piece is fixedly installed on the inner shell body, and the blocking piece is fixedly installed on the flow guide piece.

[0010] Further, the cross section of the storage cavity is in V shape, L shape or horn shape.

[0011] Further, a plurality of water curtain forming assemblies are installed on the inner shell body at different heights along the axis.

[0012] Further, the water curtain forming assembly further comprises a leveling piece, which is detachably mounted on the barrier piece, and the leveling piece has a circular arc or polygonal cross section, and an inclined surface is arranged on the upper portion of the leveling piece.

[0013] The utility model also provides a reactor residual heat removal system, include: inner casing and outer casing and install residual heat removal device on the outer casing upper end, the residual heat removal device includes: inner residual heat removal mechanism and outer residual heat removal mechanism, the outer residual heat removal mechanism includes the water curtain forming assembly of installing on the inner casing outer wall, the inner residual heat removal mechanism installs in the inside of inner casing.

[0014] Further, the inner residual heat removal mechanism comprises a high-level water tank, a heat exchanger, a water pipeline, an air duct in the shell, a pressure measurement probe and a central control module, the high-level water tank is fixedly installed on the outer casing, the heat exchanger is fixedly installed in the inside of the inner casing through a support, the water pipeline is installed between the heat exchanger and the high-level water tank, the air duct in the shell is installed in the inside of the inner casing, the bottom end of the air duct in the shell is communicated with the bottom of the inner casing, the pressure measurement probe is installed on the inner casing to detect the internal pressure of the inner casing, the high-level water tank, the heat exchanger and the pressure measurement probe are electrically connected with the central control module.

[0015] Further, an annular cavity is arranged between the inner casing and the outer casing, and the outer residual heat removal mechanism further comprises a chimney, a drain pipe and an external air duct, the chimney is fixedly installed on the high-level water tank and communicated with the annular cavity, the drain pipe is fixedly installed at the bottom of the high-level water tank and communicated with the inside of the high-level water tank, the control valve of the high-level water tank is electrically connected with the central control module, the external air duct is installed on the outer casing, the inlet of the external air duct is arranged on the upper portion of the periphery of the outer casing, and the outlet of the external air duct is arranged on the inner side of the lower portion of the outer casing and communicated with the annular cavity.

[0016] Further, an outlet is arranged at the lower portion of the outer casing, and a water level detection probe is installed on the inner side of the outer casing and electrically connected with the central control module.

[0017] The utility model has the advantages that:

[0018] The application sets the outer shell around the periphery of the inner shell, the water curtain forming assembly is fixedly installed around the outer wall of the inner shell, and a storage cavity for containing cooling water is arranged between the inner shell and the water curtain forming assembly; the water curtain forming assembly comprises a blocking piece and a flow guide piece, the flow guide piece or the blocking piece is fixedly installed on the inner shell, the blocking piece and the flow guide piece are connected with each other, the top end of the blocking piece is horizontally arranged, and the bottom end of the flow guide piece is in contact with the outer wall of the inner shell. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the present application, the present application will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise of not deviating from the scope of the present application.

[0020] In the drawings:

[0021] Figure 1 is a structural schematic view of the reactor containment in some embodiments of the present application;

[0022] Figure 2 is a cross-sectional schematic view of the blocking piece and the flow guide piece in the present application;

[0023] Figure 3 is a cross-sectional schematic view of the water curtain forming assembly in the present application;

[0024] Figure 4is another embodiment of the water curtain forming assembly cross section schematic view of the utility model;

[0025] Figure 5 is another embodiment of the water curtain forming assembly cross section schematic view of the utility model;

[0026] Figure 6 is the structure schematic view of the reactor residual heat removal system of the utility model.

[0027] Legend to the drawings

[0028] Inner shell 1, water curtain forming assembly 2, barrier 21, drainage 22, leveling piece 23, storage cavity 3, outer shell 4, residual heat removal device 5, inner residual heat removal mechanism 51, high water tank 511, heat exchanger 512, water pipeline 513, shell air duct 514, pressure measurement probe 515, central control module 516, outer residual heat removal mechanism 52, chimney 521, drain pipe 522, external air duct 523, annular cavity 6, discharge port 8, water level detection probe 9. DETAILED DESCRIPTION

[0029] In order to have more clear understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be described in detail by referring to the drawings. In the following description, it should be understood that the orientation or position relationship of "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, constructed and operated in a particular orientation, and is only for the convenience of describing the technical scheme, and cannot be understood as indicating that the indicated device or element must have a particular orientation, so it cannot be understood as a limitation of the utility model.

[0030] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0032] Please see Figures 1 to 5 The reactor containment structure in the first embodiment of this utility model includes: an inner shell 1 and an outer shell 4, and a water curtain forming assembly 2 for removing residual heat from the inner shell 1. The outer shell 4 is sleeved around the outer periphery of the inner shell 1, and the water curtain forming assembly 2 is surrounded and fixedly installed on the outer wall of the inner shell 1. A storage cavity 3 for accommodating cooling water is provided between the inner shell 1 and the water curtain forming assembly 2. The water curtain forming assembly 2 includes: a baffle 21 and a guide 22. The guide 22 or the baffle 21 is fixedly installed on the inner shell 1. The baffle 21 and the guide 22 are connected to each other. The top end of the baffle 21 is set to be horizontal, and the bottom end of the guide 22 is in contact with the outer wall of the inner shell 1.

[0033] The outer shell 4, which is fitted around the inner shell 1, can protect the inner shell 1 from external impacts, thereby improving safety. It can also provide a certain degree of sealing for the inner shell 1, further enhancing safety.

[0034] The application is sleeved on the periphery of the inner shell 1, the water curtain forming assembly 2 is fixedly installed on the outer wall of the inner shell 1, and the storage cavity 3 containing cooling water is arranged between the inner shell 1 and the water curtain forming assembly 2; the water curtain forming assembly 2 comprises a blocking piece 21 and a flow guide piece 22, the flow guide piece 22 or the blocking piece 21 is fixedly installed on the inner shell 1, the blocking piece 21 and the flow guide piece 22 are connected with each other, and the top end of the blocking piece 21 is horizontally arranged, and the bottom end of the flow guide piece 22 is in contact with the outer wall of the inner shell 1.

[0035] When the cooling water flows down from the top of the inner shell 1, the cooling water flows down along the outer wall of the inner shell 1 through the dome at the top of the inner shell 1, the cooling water flowing down along the outer wall of the inner shell 1 is blocked by the water curtain forming assembly 2, so that the cooling water flowing down in a strand is temporarily stored in the storage cavity 3, the cooling water stored in the storage cavity 3 continues to be in contact with the outer wall of the inner shell 1 to cool the inner shell 1, when the storage cavity 3 is filled with the left cooling water, the cooling water flows out from the top end of the blocking piece 21, so that the cooling water flows out from the top end of the blocking piece 21 at the same time, avoiding that the cooling water flows down in a strand all the time, the cooling water flowing out flows along the outer wall of the blocking piece 21 to the flow guide piece 22 through the surface tension of the liquid, and then the flow guide piece 22 makes the cooling water flowing out in contact with the outer wall of the inner shell 1 to cool the inner shell 1, the whole process forms the water curtain effect of the cooling water flowing down in a strand on the outer wall of the inner shell 1, and the contact area of the cooling water and the outer wall of the inner shell 1 is increased, the water curtain forming assembly 2 does not need to use electrical elements for control, the above cooling steps can be completed through the structure, the manufacturing cost is saved, damage is not easy to occur in the cooling process, the safety in use is ensured, the cooling effect is improved, the cooling and pressure reduction speed is fast, the heat conduction is more uniform, the cooling capacity is better, the use rate of the cooling water is improved, and the use amount of the cooling water is reduced.

[0036] Please refer to Figure 1 and Figure 5 In some embodiments, the blocking piece 21 is fixedly installed on the inner shell 1, the cross section of the blocking piece 21 is in an arc shape, and the flow guide piece 22 is obliquely installed between the blocking piece 21 and the inner shell 1.

[0037] The application is fixedly installed on the inner shell 1 through the blocking piece 21, the cross section of the blocking piece 21 is in an arc shape, and the flow guide piece 22 is obliquely installed between the blocking piece 21 and the inner shell 1, wherein the arc-shaped blocking piece 21 can make the cooling water more smoothly transition to the flow guide piece 22, reduce the direct falling of the cooling water due to its own gravity when flowing out of the storage cavity 3, and make the cooling water reach the outer wall of the inner shell 1 through the flow guide piece 22, thereby reducing the waste of the cooling water, improving the efficiency of the water curtain formation and the cooling effect, making the cooling and pressure reduction speed faster, the heat conduction capacity better, and the reliability during cooling higher.

[0038] The arc-shaped barrier 21 can withstand greater impact force and is not prone to deformation, and can keep the top end of the barrier 21 horizontal, thereby keeping the water curtain formed for a long time and improving the cooling effect of the cooling water on the inner shell 1 for a long time.

[0039] Please refer to Figure 1 and Figure 2 In some embodiments, the drainage member 22 is fixedly installed on the inner shell 1, and the barrier 21 is fixedly installed on the drainage member 22.

[0040] The drainage member 22 is fixedly installed on the inner shell 1, and the barrier 21 is fixedly installed on the drainage member 22. When the drainage member 22 is fixedly installed on the inner shell 1, the drainage member 22 is used to block the flow of cooling water, so that the cooling water is retained in the storage cavity 3. The upper end surface of the water curtain forming assembly 2 composed of the drainage member 22 and the barrier 21 is leveled horizontally by the barrier 21 installed on the drainage member 22, so that the cooling water flows down from the top of the barrier 21 to form a water curtain, thereby being applicable to more use environments, facilitating installation, and improving the cooling effect.

[0041] The drainage member 22 and the barrier 21 can also be integrally formed, thereby reducing the gap between the drainage member 22 and the barrier 21, making the connection between the drainage member 22 and the barrier 21 more compact, improving the stability during operation, further reducing the waste of cooling water, making the installation more convenient, and saving the installation steps and costs.

[0042] Please refer to Figures 1 to 4 In some embodiments, the cross section of the storage cavity 3 is V-shaped, L-shaped or trumpet-shaped.

[0043] The cross section of the storage cavity 3 is V-shaped, L-shaped or trumpet-shaped. When the cross section of the storage cavity 3 is V-shaped, it is convenient for installers to install, and the cooling water can flow more smoothly from the storage cavity 3 to the inner shell 1. When the cross section of the storage cavity 3 is L-shaped, the liquid level inside the storage cavity 3 can be improved, so that the cooling water in the storage cavity 3 can more fully cool the outer wall of the inner shell 1, thereby improving the cooling effect. When the cross section of the storage cavity 3 is trumpet-shaped, the trumpet-shaped cross section of the storage cavity 3 can further improve the contact area between the cooling water in the storage cavity 3 and the outer wall of the inner shell 1, thereby further improving the cooling effect and further reducing the waste of cooling water.

[0044] Please refer to Figures 1 to 5 In some embodiments, a plurality of water curtain forming assemblies 2 are installed on the inner shell 1 at different heights along the axis.

[0045] The cooling water entering the storage cavity 3 along the outer wall of the inner shell 1 will be circumferentially spread under the action of gravity, playing a role of re-distribution and uniformity of the cooling water flow, so that the cooling water can uniformly infiltrate the outer surface of the inner shell 1 in the circumferential direction, increasing the heat exchange capacity with the inner shell 1. The water curtain forming assembly 2 arranged at intervals on the outer surface of the inner shell 1 can prevent the cooling water from coalescing into a columnar flow, thereby ensuring that the contact area of the cooling water with the outer surface of the inner shell 1 is maximized, enhancing the contact heat exchange capacity, and greatly improving the ability to cool the high-temperature and high-pressure steam inside the inner shell 1. As the cooling water gradually vaporizes along the height of the inner shell 1, the flow of the cooling water gradually decreases, making it easier for the cooling water to coalesce into a columnar flow on the outer surface of the inner shell 1. Therefore, as the height of the inner shell 1 decreases, the spacing between adjacent water curtain forming assemblies 2 gradually decreases, ensuring that the circumferentially uniformly distributed film-shaped cooling water is re-distributed again before coalescing into a column, improving circumferential uniformity.

[0046] The present application is provided with a plurality of water curtain forming assemblies 2 installed at different heights along the axis on the inner shell 1. The cooling water will evaporate when passing through the outer wall of the inner shell 1, and will easily form a water column flow after evaporation. Therefore, a plurality of water curtain forming assemblies 2 are installed at different heights along the axis on the outer wall of the inner shell 1. After the cooling water passes through the first water curtain forming assembly 2, the cooling water will form a water curtain and flow down along the outer wall of the inner shell 1. The cooling water that has evaporated after passing through the outer wall of the inner shell 1 will again encounter the water curtain forming assembly 2. When the cooling water fills the storage cavity 3, it will flow out of the second water curtain forming assembly 2 and form a water curtain again, cooling the outer wall of the inner shell 1, further improving the cooling effect at different positions of the inner shell 1, making the cooling of the inner shell 1 more uniform. The use of multiple water curtain forming assemblies 2 also increases the contact time of the cooling water with the outer wall of the inner shell 1, further improving the cooling effect and reducing the waste of cooling water.

[0047] Please refer to Figure 3 and Figure 4 In some embodiments, the water curtain forming assembly 2 further comprises a leveling piece 23, which is detachably installed on the blocking piece 21. The leveling piece 23 has a circular arc or polygonal cross-section, and an inclined surface is provided on the upper part of the leveling piece 23.

[0048] The application further comprises a leveling piece 23 through the water curtain forming assembly 2, the leveling piece 23 is detachably installed on the barrier piece 21, the leveling piece 23 is in cross-section arc-shaped or polygonal, the upper part of the leveling piece 23 is provided with an inclined surface, wherein the leveling piece 23 can be clamped or welded on the barrier piece 21, after the barrier piece 21 and the flow guide piece 22 are completely installed, which position of the barrier piece 21 and the flow guide piece 22 is inclined compared with other positions can be detected through the laser level, so that the top end of the whole barrier piece 21 is not in the same horizontal position, and then the leveling piece 23 is installed on the inclined position of the barrier piece 21, so that the top end of the leveling piece 23 is in the same horizontal plane with the top end of the whole barrier piece 21, thereby reducing the time of leveling the top end of the barrier piece 21, reducing the difficulty during installation, improving the installation efficiency, and reducing the labor intensity.

[0049] Please refer to Figure 1 and Figure 6 The utility model also provides a reactor residual heat removal system, the reactor residual heat removal system includes: inner casing 1 and outer casing 4 and install residual heat removal device 5 on the outer casing 4 upper end, and residual heat removal device 5 includes: inner residual heat removal mechanism 51 and outer residual heat removal mechanism 52, and outer residual heat removal mechanism 52 includes water curtain forming assembly 2 installed on the outer wall of inner casing 1, and inner residual heat removal mechanism 51 is installed in the inside of inner casing 1.

[0050] The application comprises: an inner casing 1 and an outer casing 4, and a residual heat removal device 5 installed on the upper end of the outer casing 4, the residual heat removal device 5 comprises: an inner residual heat removal mechanism 51 and an outer residual heat removal mechanism 52, the outer residual heat removal mechanism 52 comprises a water curtain forming assembly 2 installed on the outer wall of the inner casing 1, and the inner residual heat removal mechanism 51 is installed in the inside of the inner casing 1, which can cool the inside of the inner casing 1, achieving good heat removal effect, and the outer residual heat removal mechanism 52 can quickly cool the outer surface of the outer casing 4, and the inner residual heat removal mechanism 51 and the outer residual heat removal mechanism 52 can simultaneously remove residual heat from the inside and outside of the inner casing 1, thereby improving the heat dissipation effect and heat removal efficiency of the inner casing 1.

[0051] Please refer to Figure 1 and Figure 6In some embodiments, the internal residual heat exhaust mechanism 51 comprises a high water tank 511, a heat exchanger 512, a water pipeline 513, an air duct 514, a pressure measurement probe 515 and a central control module 516. The high water tank 511 is fixedly installed on the outer shell 4. The heat exchanger 512 is fixedly installed inside the inner shell 1 by a support. The water pipeline 513 is installed between the heat exchanger 512 and the high water tank 511. The air duct 514 is installed inside the inner shell 1. The bottom end of the air duct 514 is connected to the outside of the inner shell 1. The pressure measurement probe 515 is installed on the inner shell 1 to detect the internal pressure of the inner shell 1. The high water tank 511, the heat exchanger 512 and the pressure measurement probe 515 are electrically connected to the central control module 516.

[0052] The high water tank 511 is fixedly installed on the outer shell 4. The heat exchanger 512 is fixedly installed inside the inner shell 1 by a support. The water pipeline 513 is installed between the heat exchanger 512 and the high water tank 511. The air duct 514 is installed inside the inner shell 1. The bottom end of the air duct 514 is connected to the outside of the inner shell 1. The pressure measurement probe 515 is installed on the inner shell 1 to detect the internal pressure of the inner shell 1. The high water tank 511, the heat exchanger 512 and the pressure measurement probe 515 are electrically connected to the central control module 516.

[0053] The pressure measurement probe 515 can adapt to the pressure range of the measurement environment through the adjustment of the central control module 516, and thus be suitable for different use environments.

[0054] After the nuclear energy release accident occurs in the inner shell 1, a large amount of high-temperature and high-pressure water vapor will be discharged to the inner space of the inner shell 1, causing the inner shell 1 to rapidly increase in temperature and pressure, threatening the integrity of the inner shell 1. The pressure measuring probe 515 installed in the inner shell 1 can measure the pressure of the environment in real time, and when the measured value is higher than the set value, such as 1.2 bar pressure, the central control module 516 automatically triggers the inner residual heat discharge mechanism 51 of the inner shell 1, and triggers the opening of the isolation valve of the water guide pipeline 513. After the isolation valve is opened, the cooling water in the high-level water tank 511 enters the heat exchange pipe of the heat exchanger 512 through the inlet pipeline of the water guide pipeline 513 under the action of gravity, and after heat exchange with the heat exchanger 512, the water temperature gradually rises, and a small amount of air bubbles may be generated in the pipe, so that the cooling water on the outlet pipeline of the water guide pipeline 513 has a lower temperature than the cooling water on the inlet pipeline, thereby generating a natural circulation driving force due to the difference in gravity, so that the cooling water in the high-level water tank 511 continuously circulates along the closed loop: high-level water tank 511-inlet pipeline of water guide pipeline 513-heat exchanger 512-outlet pipeline of water guide pipeline 513-high-level water tank 511, continuously taking out heat from the inner shell 1. On the inner side of the inner shell 1, the temperature of the air after heat exchange with the heat exchanger 512 decreases, and the density increases, so that the air sinks along the shell inner air duct 514 and is finally discharged from the bottom outlet of the shell inner air duct 514. The sinking of the cold air gradually fills the shell inner air duct 514 below the heat exchanger 512 with relatively heavy cold air, thereby forming a sinking suction force in the shell inner air duct 514, producing a "chimney" suction effect, continuously sucking the hot air at the top of the inner shell 1 into the top inlet of the shell inner air duct 514, flushing the shell inner air duct 514, improving the heat exchange capacity of the heat exchanger 512 and the hot air, and thereby improving the heat removal effect of the inner shell 1.

[0055] Please refer to Figure 1 and Figure 6 In some embodiments, an annular cavity 6 is arranged between the inner shell 1 and the outer shell 4, and the outer residual heat discharge mechanism 52 further comprises: a chimney 521, a drain pipe 522 and an outer air duct 523, the chimney 521 is fixedly installed on the high-level water tank 511 and communicates with the annular cavity 6; the drain pipe 522 is fixedly installed at the bottom of the high-level water tank 511 and communicates with the inside of the high-level water tank 511; the control valve of the high-level water tank 511 is electrically connected with the central control module 516, and the outer air duct 523 is installed on the outer shell 4, the inlet of the outer air duct 523 is arranged on the upper part of the periphery of the outer shell 4, and the outlet of the outer air duct 523 is arranged on the inner side of the lower part of the outer shell 4 and communicates with the annular cavity 6.

[0056] The annular cavity 6 arranged between the inner shell 1 and the outer shell 4 can be used for gas circulation in the annular cavity 6, thereby improving the heat dissipation effect in normal use, and the annular cavity 6 can also temporarily store the flowing cooling water, thereby further improving the heat dissipation effect.

[0057] The annular cavity 6 arranged between the inner shell 1 and the outer shell 4, the chimney 521 fixedly installed on the high-level water tank 511 and connected with the annular cavity 6, the drain pipe 522 fixedly installed at the bottom of the high-level water tank 511 and connected with the inside of the high-level water tank 511, the control valve of the high-level water tank 511 electrically connected with the central control module 516, the external air duct 523 installed on the outer shell 4, the inlet of the external air duct 523 arranged on the outer periphery of the upper part of the outer shell 4, and the outlet of the external air duct 523 arranged on the inner side of the lower part of the outer shell 4 and connected with the annular cavity 6.

[0058] When the temperature or pressure in the inner shell 1 is increased, the central control module 516 can separately open the control valve of the high-level water tank 511, so that the cooling water in the high-level water tank 511 flows out through the drain pipe 522, acts on the top end of the inner shell 1 and exchanges heat with the outer surface of the inner shell 1, thereby cooling the outer surface of the inner shell 1. According to the site conditions, it is selected whether the internal residual heat discharge mechanism 51 and the external residual heat discharge mechanism 52 are simultaneously performed or separately operated, thereby expanding the applicable range. The internal residual heat discharge mechanism 51 and the external residual heat discharge mechanism 52 in two different operation stages are matched, so that the free volume in the inner shell 1 is small, the purpose of miniaturization arrangement is achieved, the installation space is saved, and the applicable range is further expanded.

[0059] The top of the outer shell 4 is provided with the high-level water tank 511, and the high-level water tank 511 stores a certain volume of cooling water. The center of the water tank is provided with a reserved channel for installing the chimney 521, so that the air in the annular cavity 6 between the inner shell 1 and the outer shell 4 can continue to rise to the top and enter the external atmosphere environment through the chimney 521, thereby achieving a certain heat dissipation effect. When the cooling water in the high-level water tank 511 is discharged, the temperature in the inner shell 1 and the decay heat of the reactor are also reduced to a low level. The cooling water on the outer surface of the inner shell 1 is gradually evaporated, and the cold air entering from the external air duct 523 continues to be heated, becomes hot air and is discharged through the chimney 521. Under the suction effect of the chimney 521, the upper inlet of the external air duct 523-external air duct 523-lower outlet of the external air duct 523-annular cavity 6-chimney 521, thereby forming the natural circulation of the air in the annular cavity 6. The cold air entering from the upper inlet or air vent of the external air duct 523 can take away the residual heat of the reactor in the inner shell 1, and the pressure and temperature in the inner shell 1 can be maintained within the designed value range for a long time, thereby ensuring the sealing requirement of the inner shell 1.

[0060] Please refer to Figure 1 and Figure 6 In some embodiments, the lower part of the outer shell 4 is provided with a discharge port 8, and a water level detection probe 9 is installed inside the outer shell 4 and electrically connected to the central control module 516.

[0061] The present application is provided with a discharge port 8 at the lower part of the outer shell 4, and a water level detection probe 9 is installed inside the outer shell 4 and electrically connected to the central control module 516, so that the cooling water in the annular cavity 6 can be discharged through the discharge port 8, avoiding the cooling water from flooding the bottom outlet of the external air duct 523, thereby improving safety. Through the water level detection probe 9 installed inside the outer shell 4, the water level detection probe 9 is electrically connected to the central control module 516, and the water level detection probe 9 can be used to display the volume of cooling water in the annular cavity 6 on the central control module 516 in real time, so that the speed of discharging cooling water from the high-level water tank 511 can be controlled by the central control module 516, and the cooling water can be fully evaporated before flowing to the bottom while controlling the heat removal capacity of the outer heat removal mechanism 52, thereby improving the use efficiency of the cooling water and avoiding waste caused by excessive cooling water being discharged from the discharge port 8.

[0062] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the present application patent; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some deformations and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A reactor containment, characterized in that, Include: Inner shell (1) and outer shell (4), and remove the water curtain formation assembly (2) in the inner shell (1) residual heat, the outer shell (4) is set on the periphery of the inner shell (1), the water curtain formation assembly (2) is around and fixedly installed on the outer wall of the inner shell (1), the inner shell (1) and the water curtain formation assembly (2) are provided with storage cavity (3) containing cooling water; The water curtain formation assembly (2) comprises: a barrier (21) and a drainage member (22), the drainage member (22) or the barrier (21) is fixedly installed on the inner shell (1), the barrier (21) and the drainage member (22) are connected with each other, the top end of the barrier (21) is provided horizontally, and the bottom end of the drainage member (22) is in contact with the outer wall of the inner shell (1).

2. The reactor containment of claim 1, wherein, The barrier (21) is fixedly installed on the inner shell (1), the cross section of the barrier (21) is circular arc shape, and the drainage member (22) is obliquely installed between the barrier (21) and the inner shell (1).

3. The reactor containment of claim 1, wherein, The drainage member (22) is fixedly installed on the inner shell (1), and the barrier (21) is fixedly installed on the drainage member (22).

4. The reactor containment of claim 1, wherein, The cross section of the storage cavity (3) is V-shaped, L-shaped or horn-shaped.

5. The reactor containment of claim 1, wherein, A plurality of water curtain formation assemblies (2) are installed on the inner shell (1) at different heights along the axis.

6. The reactor containment of claim 1, wherein, The water curtain formation assembly (2) further comprises a leveling member (23), the leveling member (23) is detachably installed on the barrier (21), the cross section of the leveling member (23) is circular arc shape or polygon, and an inclined surface is arranged on the upper portion of the leveling member (23).

7. A reactor residual heat removal system characterized by, Include: Inner shell (1) and outer shell (4), and residual heat exhaust device (5) installed on the upper end of the outer shell (4), the residual heat exhaust device (5) comprises: inner residual heat exhaust mechanism (51) and outer residual heat exhaust mechanism (52), the outer residual heat exhaust mechanism (52) comprises a water curtain formation assembly (2) installed on the outer wall of the inner shell (1), and the inner residual heat exhaust mechanism (51) is installed inside the inner shell (1).

8. The reactor residual heat removal system according to claim 7, characterized by The inner residual heat exhaust mechanism (51) comprises: a high water tank (511), a heat exchanger (512), a water pipeline (513), an air duct (514) in the shell, a pressure measuring probe (515) and a central control module (516), the high water tank (511) is fixedly installed on the outer shell (4), the heat exchanger (512) is fixedly installed inside the inner shell (1) through a support, the water pipeline (513) is installed between the heat exchanger (512) and the high water tank (511), the air duct (514) in the shell is installed inside the inner shell (1), the bottom end of the air duct (514) in the shell is communicated with the bottom of the inner shell (1), the pressure measuring probe (515) is installed on the inner shell (1) to detect the internal pressure of the inner shell (1), and the high water tank (511), the heat exchanger (512) and the pressure measuring probe (515) are electrically connected with the central control module (516).

9. The reactor residual heat removal system according to claim 8, characterized by The annular cavity (6) is arranged between the inner shell (1) and the outer shell (4), the outer excess heat discharging mechanism (52) further comprises a chimney (521), a drain pipe (522) and an external air duct (523), the chimney (521) is fixedly installed on the high water tank (511) and is communicated with the annular cavity (6), the drain pipe (522) is fixedly installed at the bottom of the high water tank (511) and is communicated with the inside of the high water tank (511), the control valve of the high water tank (511) is electrically connected with the central control module (516), the external air duct (523) is installed on the outer shell (4), the inlet of the external air duct (523) is arranged on the outer peripheral upper portion of the outer shell (4), and the outlet of the external air duct (523) is arranged on the inner lower portion of the outer shell (4) and is communicated with the annular cavity (6).

10. The reactor residual heat removal system according to claim 9, characterized in that, The lower portion of the outer shell (4) is provided with a discharge port (8), and the inner side of the outer shell (4) is provided with a water level detection probe (9), and the water level detection probe (9) is electrically connected with the central control module (516).

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