Heat conduction containment and heat conduction method

Abstract

The heat conduction containment is provided with a concrete shell (1) and a bottom plate (2) and is characterized by further comprising a first steel shell (3), a second steel shell (4), a plurality of annular partition plates (5) and an exhaust water conveying pipe (6), the concrete shell (1) is arranged on the outermost side, the first steel shell (3) is arranged on the inner edge face of the concrete shell (1) in an attached mode, the second steel shell (4) is arranged in the first steel shell (3), and the annular partition plates (5) are arranged on the outer edge face of the second steel shell (4). A heat exchange cavity is formed between the second steel shell (4) and the first steel shell (3), the annular partition plate (5) is arranged between the first steel shell (3) and the second steel shell (4) and divides the heat exchange cavity into a plurality of water storage layers, through holes (51) are formed in the annular partition plate (5), so that the water storage layers are in fluid communication, and the exhaust water delivery pipe (6) penetrates through the heat exchange cavity and the exterior of the containment.

Description

Technical Field

[0001] This invention relates to the field of containment design, and more specifically to a thermally conductive containment and a thermal conduction method. Background Technology

[0002] The nuclear containment vessel is the most important structure in a nuclear power plant. In the event of a nuclear accident, it serves as the last physical barrier to prevent the spread of radioactive materials from the inside out. Nuclear containment vessels can be classified into three main categories based on their structural form: reinforced concrete containment vessels, prestressed concrete containment vessels, and steel containment vessels. Reinforced concrete containment vessels are generally only suitable for reactor types with lower design pressure loads, such as various boiling water reactors and small modular reactors (SMRs), while they are suitable for reactor types with higher design pressure loads, such as most large pressurized water reactors (SMRs).

[0003] Existing containment structures generally employ prestressed concrete (with steel lining) or steel containment structures. The design concept is to retain the heat generated by the reactor within the containment structure and then indirectly release it to the environment through active means such as spraying, ventilation, or external cooling. However, due to the limited thermal conductivity of concrete, heat transfer from the inside out must traverse the steel lining, insulation layer, and thick concrete walls, resulting in high thermal resistance and slow response. In the event of a plant-wide power outage or loss of cooling water, exceeding design baseline conditions, internal steam is continuously generated but cannot be discharged in time, causing a rapid increase in temperature and pressure. This can lead to a chain of risks, including excessive stress on the containment structure, seal failure, and even hydrogen accumulation. Simultaneously, the containment structure lacks stratified heat storage and steam condensation space, resulting in a large amount of steam directly impacting the top, exacerbating localized overheating and hydrogen concentration. Operators, relying solely on a few measuring points on the dome, cannot accurately determine the temperature distribution along the wall thickness or when the concrete enters the dehydration phase transition stage, leading to delayed decisions regarding depressurization or water injection. When the molten core interacts with the concrete, non-condensable gases are continuously generated. Traditional shells lack internal gas conduction and rapid condensation methods, which can easily lead to the formation of a high-pressure zone at the top, further threatening the overall integrity.

[0004] Patent document CN108630326B discloses a steel-concrete composite structure and nuclear containment vessel with passive heat conduction function. The structure is a hexahedron composed of the arc surface of the inner steel shell, the arc surface of the outer steel shell, the upper end face, the lower end face, the front end face, and the rear end face. The steel-concrete composite structure consists of filling concrete, an inner steel shell, an outer steel shell, a filling water column, and a spherical safety plug. The filling water column is arranged in the filling concrete. One end of the filling water column is connected to the inner steel shell, and the other end extends out of the outer steel shell. The spherical safety plug is located in the end of the filling water column that extends out of the outer steel shell. The upper end face and the lower end face of the steel-concrete composite structure are respectively provided with protrusions and grooves, and the front end face and the rear end face are respectively provided with protrusions and grooves. The walls of the protrusions and grooves are provided with through holes. This invention further enhances the safety reserves of nuclear power plants under accident conditions, realizes modular construction of nuclear power plant shielding buildings through the design of combined modules, greatly shortens the construction cycle of shielding buildings, and reduces the construction cost of nuclear power plants; however, it does not solve the problem of orderly guiding core residual heat and continuous steam and finely controlling the hot zone under over-design-baseline accidents.

[0005] Patent document CN102810337B discloses an auxiliary water storage type passive double-layer containment, including an outer plate and a steel containment, with a partition ring plate between them. The outer plate is equipped with a drain valve and a water inlet valve. An exhaust port is provided on the outer plate below the partition ring plate, and an air inlet port is located below the exhaust port. A lower water tank is provided on the outer side of the outer plate, and a lower cooling water guiding system is provided between the lower water tank and the steel containment, below the partition ring plate. However, it does not solve the problem of orderly guiding the core residual heat and continuous steam and finely controlling the hot zone under the condition of an over-design basis accident.

[0006] In summary, neither of the two existing patents mentioned above has solved the problem of orderly guiding core residual heat and continuous steam and finely controlling the hot zone under the condition of an over-design-baseline accident. Summary of the Invention

[0007] Based on the above-mentioned technical problems, this invention proposes a thermally conductive containment and a thermal conduction method to solve the problems of orderly conduction of core residual heat and continuous steam and precise control of the hot zone under the condition of an over-design-base accident.

[0008] To achieve the above objectives, the present invention proposes a thermally conductive safety housing.

[0009] A thermally conductive containment vessel, comprising a concrete outer shell and a base plate, is characterized by further comprising a first steel shell, a second steel shell, multiple annular partition plates, and an exhaust and water supply pipe. The concrete outer shell is located on the outermost side, the first steel shell is fitted onto the inner surface of the concrete outer shell, the second steel shell is located inside the first steel shell, and a heat exchange cavity is formed between the second steel shell and the first steel shell. The annular partition plates are located between the first steel shell and the second steel shell, dividing the heat exchange cavity into multiple water storage layers. The annular partition plates are provided with through holes to allow fluid communication between the multiple water storage layers. The exhaust and water supply pipe extends through the heat exchange cavity and the outside of the containment vessel.

[0010] Furthermore, the exhaust water supply pipe is located at the top of the containment vessel and is used for venting air and supplying water into the heat exchange cavity.

[0011] Furthermore, the annular partition plate is arranged parallel to the base plate.

[0012] Furthermore, it includes multiple support plates, which are disposed between the first steel shell and the second steel shell; the support plates extend from the bottom plate to the apex of the second steel shell and intersect with the support plates, dividing the water storage layer into multiple water storage compartments.

[0013] Furthermore, the number of support plates is 4 to 16, and the multiple support plates are evenly distributed in the heat exchange cavity.

[0014] Furthermore, it also includes a heat-conducting pipe, which is fitted into the through hole; the heat-conducting pipe extends through two adjacent water storage layers.

[0015] Furthermore, the heat pipe includes a tapered flare, which is located at one end of the heat pipe at the bottom of the water storage layer, for collecting the steam generated in the bottom water storage layer and introducing the steam into the adjacent upper water storage layer.

[0016] Furthermore, it also includes a vapor coating, which is disposed on the inner surface of the first steel shell and the outer surface of the second steel shell, and the vapor coating is composed of a nickel-based alloy coating or a ceramic coating.

[0017] Furthermore, the base plate includes an air intake pipe, which is located inside the base plate. The inlet of the air intake pipe is located on the side of the base plate and connected to an external air pump. The outlet of the air intake pipe is located on the top surface of the base plate corresponding to the water storage compartment, for driving airflow circulation.

[0018] Furthermore, the water storage layer includes a water level monitoring device and a temperature monitoring device.

[0019] To achieve the above objectives, the present invention also proposes a heat conduction method using a heat-conducting containment structure as described above, comprising the following steps: S1: Water is pumped into the heat exchange cavity through the exhaust water pipe, and the water flows into multiple water storage layers in sequence through the through holes; S2: During core operation, the internal air pressure of the heat exchange cavity is stabilized by an external air pump connected to the exhaust water supply pipe.

[0020] Further, step S1 includes: When the water level monitoring device in the bottommost water storage layer detects that the water level has reached the preset value, the external water pump is turned off.

[0021] Further, step S2 includes: Based on the temperature data of the water storage compartment obtained by the temperature monitoring device, the air pump connected to the air inlet pipe is adjusted to control the gas flow rate in different water storage compartments.

[0022] Based on the above technical solution, the present invention has at least the following beneficial effects: 1. This invention proposes a thermally conductive containment structure and a thermal conductivity method. Through a nested arrangement of a concrete outer shell, a first steel shell, and a second steel shell, a continuous heat exchange cavity is formed within the wall thickness while maintaining the original pressure-bearing profile. This transforms the heat flow, which would otherwise have to penetrate the thick concrete, into a direct flow of water through the second steel shell. An annular partition divides this cavity into several water storage layers along its height, with through-holes between the layers allowing the water to connect sequentially from bottom to top. This layering expands the effective heat exchange area and enhances upward heat transfer through natural convection between the water layers. An exhaust water pipe, extending through each layer to the outside of the containment structure, simultaneously provides water inlets and steam outlets, enabling immediate steam and water flow and preventing steam accumulation at the top. In this invention, heat within the shell can be absorbed by adjacent water layers and continuously discharged without having to cross the steel lining, insulation layer, and concrete wall, significantly reducing the rate of temperature and pressure rise within the shell and improving the passive safety margin under accident conditions.

[0023] 2. This invention proposes a thermally conductive containment structure and a thermal conduction method. By setting an exhaust water supply pipe at the top of the containment structure and connecting it to an external air pump, and simultaneously arranging an air intake pipe in the bottom plate, airflow is injected from each water storage compartment at the bottom and discharged uniformly from the top, forming a closed loop. This loop can continuously drive the flow of steam and gas without opening the containment structure or relying on a power source, promptly carrying away heat and maintaining stable air pressure in the heat exchange cavity, effectively reducing the risk of overpressure caused by steam accumulation and extending the sealing life of the containment structure.

[0024] 3. This invention proposes a thermally conductive containment shell and a thermal conductivity method. The annular partition plate is arranged parallel to the bottom plate, and multiple evenly distributed support plates divide the water storage layer into multiple vertically connected and horizontally separated water storage compartments. The support plates not only serve as structural reinforcement but also act as thermally conductive fins to increase the heat exchange area, allowing heat to be absorbed in layers in the vertical direction and diffused evenly in the horizontal direction, significantly improving the overall heat exchange efficiency, suppressing local overheating, and maintaining a balanced temperature distribution on the shell wall.

[0025] 4. This invention proposes a thermally conductive containment structure and a thermal conduction method. The thermally conductive pipe is embedded with a through hole and penetrates the adjacent water storage layer. Its bottom conical flare collects the lower layer steam and uses buoyancy to guide the steam into the upper water space for condensation, forming a continuous interlayer steam self-circulation that quickly removes latent heat. The water storage compartment is equipped with water level and temperature monitoring devices, and the heat exchange cavity is disassembled into several independent monitoring units for real-time and precise heat management. Based on this, operators can individually replenish water to the corresponding compartment or adjust the flow rate of the bottom air inlet pipe, realizing layer-by-layer and compartment-by-compartment quantitative heat management. This completely avoids the blind spots and delayed intervention caused by the traditional containment structure relying solely on a single point measurement point on the dome, significantly improving the passive safety margin in the event of a serious accident. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A three-dimensional side cross-sectional view of a thermally conductive containment enclosure according to one embodiment is shown; Figure 2 A cross-sectional view of a thermally conductive containment enclosure according to one embodiment is shown; Figure 3 A cross-sectional view of a thermally conductive containment enclosure according to another embodiment is shown; Figure 4 A partial cross-sectional view of a thermally conductive containment enclosure according to one embodiment is shown; Figure 5 A partial cross-sectional view of a thermally conductive containment enclosure according to another embodiment is shown.

[0027] The above figures include the following reference numerals: 1. Concrete shell; 2. Base plate; 3. First steel shell; 4. Second steel shell; 5. Annular partition plate; 6. Exhaust and water supply pipe; 7. Support plate; 8. Heat conduction pipe; 9. Steam coating; 10. Water level monitoring device; 11. Temperature monitoring device; 21. Intake pipe; 51. Through hole. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] The present invention will be further described in detail below with reference to specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention. The term "comprising" indicates the presence of a feature, but does not exclude the presence or addition of one or more other features. The terms "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In this description, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0031] Example

[0032] This invention proposes a thermally conductive containment structure and a thermal conduction method to solve the problems of orderly conduction of core residual heat and continuous steam and precise control of hot zones under conditions of over-design-base accidents.

[0033] In this invention, "fluid connectivity" refers to connecting different containers or devices through pipes, pipelines, or through holes to enable the transmission and distribution of fluids such as gases or liquids. In such a connectivity system, fluids such as gases or liquids can flow from one container to another or from one device to another under the action of pressure difference.

[0034] In this invention, "fittable configuration" refers to two or more mechanical components that can be connected together through a specific interface or mating surface design to form a complete structure or system. Such configuration requires that the shape, size and locking mechanism of the interface or mating surface between the components match.

[0035] A thermally conductive containment enclosure, such as Figure 1As shown, the structure includes a concrete outer shell 1 and a base plate 2, and is characterized by further comprising a first steel shell 3, a second steel shell 4, multiple annular partition plates 5, and an exhaust water supply pipe 6. The concrete outer shell 1 is located on the outermost side, the first steel shell 3 is attached to the inner surface of the concrete outer shell 1, the second steel shell 4 is located inside the first steel shell 3, and a heat exchange cavity is formed between the second steel shell 4 and the first steel shell 3. The annular partition plates 5 are located between the first steel shell 3 and the second steel shell 4, dividing the heat exchange cavity into multiple water storage layers. The annular partition plates 5 are provided with through holes 51 to allow fluid communication between the multiple water storage layers. The exhaust water supply pipe 6 extends through the heat exchange cavity and the outside of the containment structure.

[0036] Specifically, such as Figure 1 As shown, the exhaust water supply pipe 6 is located at the top of the containment vessel, penetrating the heat exchange cavity and the outside of the containment vessel, and is used for exhausting air and supplying water into the heat exchange cavity. In other embodiments, it may also be located at other positions on the arched structure of the containment vessel.

[0037] Furthermore, 3 to 7 annular partition plates 5 can be set in the heat exchange cavity, and each annular partition plate 5 is arranged parallel to the bottom plate 2. Preferably, 5 annular partition plates 5 are set in this embodiment.

[0038] Furthermore, the heat exchange cavity is provided with multiple support plates 7, which extend from the bottom plate 2 to the apex of the second steel shell 4 and intersect with the support plate 7, dividing the water storage layer into multiple water storage compartments; the number of support plates 7 is 4-16, and the multiple support plates 7 are evenly distributed in the heat exchange cavity. Further, preferably, in this embodiment, as shown... Figure 2 The diagram shows eight support plates 7.

[0039] Furthermore, such as Figure 2 The annular partition plate 5 shown in the figure has through holes 51 that extend through both sides of the annular partition plate 5, allowing steam to flow from the bottom of the containment vessel along the distribution direction of the water storage layer to the exhaust water supply pipe 6.

[0040] Furthermore, such as Figure 4 The heat exchange cavity shown is provided with a heat-conducting pipe 8, which is fitted into the through hole 51; the heat-conducting pipe 8 extends through two adjacent water storage layers; the heat-conducting pipe 8 includes a tapered flare 81, which is located at one end of the bottom water storage layer on the heat-conducting pipe 8, for collecting the steam generated in the bottom water storage layer and introducing the steam into the adjacent upper water storage layer.

[0041] In other embodiments, such as Figure 3The through hole 51 is provided along the outer periphery of the second steel shell 4. At this time, the heat conduction pipe 8 is not required, so that the steam can flow directly through the through hole 51 to the exhaust water pipe 6.

[0042] Furthermore, such as Figure 4 The containment structure shown also includes a vapor coating 9, which is disposed on the inner surface of the first steel shell 3 and the outer surface of the second steel shell 4. The vapor coating 9 is composed of a nickel-based alloy coating or a ceramic coating.

[0043] Furthermore, such as Figure 4 The base plate 2 shown includes an air inlet pipe 21, which is located inside the base plate 2. The inlet of the air inlet pipe 21 is located on the side of the base plate 2 and connected to an external air pump. The outlet of the air inlet pipe 21 is located on the top surface of the base plate 2 corresponding to the water storage compartment, and is used to drive airflow circulation.

[0044] Furthermore, such as Figure 1 The water storage layer shown includes a water level monitoring device 10 and a temperature monitoring device 11. Preferably, each water storage compartment is equipped with a water level monitoring device 10 and a temperature monitoring device 11 to accurately monitor the water level data and temperature data of the equipment, thereby adjusting the external air pump connected to the air inlet pipe 21 and regulating the temperature of the heat exchange cavity by controlling the steam flow rate.

[0045] In other embodiments, such as Figure 5 As shown, the heat pipe 8 located at one end of the bottom water storage layer can be a straight cylindrical flared end.

[0046] To achieve the above objectives, the present invention also proposes a heat conduction method using a heat-conducting containment structure as described above, comprising the following steps: S1: Water is pumped into the heat exchange cavity through the exhaust water pipe 6, and the water flows into multiple water storage layers in sequence through the through hole 51; S2: During core operation, the internal air pressure of the heat exchange cavity is stabilized by an external air pump connected to the exhaust water supply pipe 6.

[0047] Further, step S1 includes: When the water level monitoring device 10 in the bottommost water storage layer detects that the water level has reached the preset value, the external water pump is turned off.

[0048] Further, step S2 includes: Based on the temperature data of the water storage compartment obtained by the temperature monitoring device 11, the air pump connected to the air inlet pipe 21 is adjusted to control the gas flow rate in different water storage compartments.

[0049] In summary, as can be seen from the above description, the embodiments of the present invention achieve the following technical effects: 1. This invention proposes a thermally conductive containment structure and a thermal conductivity method. Through a nested arrangement of a concrete outer shell, a first steel shell, and a second steel shell, a continuous heat exchange cavity is formed within the wall thickness while maintaining the original pressure-bearing profile. This transforms the heat flow, which would otherwise have to penetrate the thick concrete, into a direct flow of water through the second steel shell. An annular partition divides this cavity into several water storage layers along its height, with through-holes between the layers allowing the water to connect sequentially from bottom to top. This layering expands the effective heat exchange area and enhances upward heat transfer through natural convection between the water layers. An exhaust water pipe, extending through each layer to the outside of the containment structure, simultaneously provides water inlets and steam outlets, enabling immediate steam and water flow and preventing steam accumulation at the top. In this invention, heat within the shell can be absorbed by adjacent water layers and continuously discharged without having to cross the steel lining, insulation layer, and concrete wall, significantly reducing the rate of temperature and pressure rise within the shell and improving the passive safety margin under accident conditions.

[0050] 2. This invention proposes a thermally conductive containment structure and a thermal conduction method. By setting an exhaust water supply pipe at the top of the containment structure and connecting it to an external air pump, and simultaneously arranging an air intake pipe in the bottom plate, airflow is injected from each water storage compartment at the bottom and discharged uniformly from the top, forming a closed loop. This loop can continuously drive the flow of steam and gas without opening the containment structure or relying on a power source, promptly carrying away heat and maintaining stable air pressure in the heat exchange cavity, effectively reducing the risk of overpressure caused by steam accumulation and extending the sealing life of the containment structure.

[0051] 3. This invention proposes a thermally conductive containment shell and a thermal conductivity method. The annular partition plate is arranged parallel to the bottom plate, and multiple evenly distributed support plates divide the water storage layer into multiple vertically connected and horizontally separated water storage compartments. The support plates not only serve as structural reinforcement but also act as thermally conductive fins to increase the heat exchange area, allowing heat to be absorbed in layers in the vertical direction and diffused evenly in the horizontal direction, significantly improving the overall heat exchange efficiency, suppressing local overheating, and maintaining a balanced temperature distribution on the shell wall.

[0052] 4. This invention proposes a thermally conductive containment structure and a thermal conductivity method. The thermally conductive pipe is embedded with through-holes and penetrates adjacent water storage layers. Its bottom conical flare collects steam from the lower layer, and the steam is guided into the upper water space for condensation by buoyancy, forming a continuous interlayer steam self-circulation that quickly removes latent heat. The water storage compartments are equipped with water level and temperature monitoring devices, disassembling the heat exchange cavity into several independent monitoring units for real-time, precise heat management. Operators can then individually replenish water to corresponding compartments or adjust the flow rate of the bottom air inlet pipe, achieving layer-by-layer, compartment-by-compartment quantitative heat management. This completely avoids the blind spots and delayed intervention caused by traditional containment structures relying solely on single-point measurement points on the dome, significantly improving the passive safety margin in the event of a severe accident. The above description is merely a preferred embodiment of the invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0054] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A thermally conductive containment shell, comprising a concrete outer shell (1) and a base plate (2), characterized in that, It also includes a first steel shell (3), a second steel shell (4), multiple annular partition plates (5) and an exhaust water supply pipe (6). The concrete shell (1) is located on the outermost side. The first steel shell (3) is attached to the inner side surface of the concrete shell (1). The second steel shell (4) is located inside the first steel shell (3). A heat exchange cavity is formed between the second steel shell (4) and the first steel shell (3). The annular partition plate (5) is located between the first steel shell (3) and the second steel shell (4) to divide the heat exchange cavity into multiple water storage layers. The annular partition plate (5) is provided with through holes (51) to allow fluid communication between the multiple water storage layers. The exhaust water supply pipe (6) runs through the heat exchange cavity and the outside of the containment shell.

2. The containment vessel according to claim 1, characterized in that, The exhaust water supply pipe (6) is located at the top of the containment vessel and is used for exhausting air and supplying water into the heat exchange cavity.

3. The containment vessel according to claim 1, characterized in that, The annular partition plate (5) is arranged parallel to the base plate (2).

4. The containment vessel according to claim 3, characterized in that, Includes multiple support plates (7). The support plate (7) is located between the first steel shell (3) and the second steel shell (4); the support plate (7) extends from the bottom plate (2) to the top of the second steel shell (4) and intersects with the support plate (7), dividing the water storage layer into multiple water storage compartments.

5. The containment vessel according to claim 4, characterized in that, The number of the support plates (7) is 4 to 16, and the multiple support plates (7) are evenly distributed in the heat exchange cavity.

6. The containment vessel according to claim 1, characterized in that, It also includes a heat pipe (8). The heat pipe (8) and the through hole (51) are fitted together; the heat pipe (8) runs through two adjacent water storage layers.

7. The containment vessel according to claim 6, characterized in that, The heat pipe (8) includes a tapered flare (81). The conical flare (81) is located at one end of the bottom water storage layer on the heat pipe (8) and is used to collect the steam generated in the bottom water storage layer and introduce the steam into the adjacent upper water storage layer.

8. The containment vessel according to claim 1, characterized in that, It also includes a vapor coating (9). The vapor coating (9) is disposed on the inner surface of the first steel shell (3) and the outer surface of the second steel shell (4), and the vapor coating (9) is composed of a nickel-based alloy coating or a ceramic coating.

9. The containment vessel according to claim 4, characterized in that, The base plate (2) includes an air intake pipe (21). The air intake pipe (21) is located inside the base plate (2). The inlet of the air intake pipe (21) is located on the side of the base plate (2) and connected to an external air pump. The outlet of the air intake pipe (21) is located on the top surface of the base plate (2) corresponding to the water storage compartment, and is used to drive airflow circulation.

10. The containment vessel according to claim 1, characterized in that, The water storage layer includes a water level monitoring device (10) and a temperature monitoring device (11).

11. A heat conduction method based on the thermally conductive containment structure according to any one of claims 1-10, characterized in that, include: S1: Water is pumped into the heat exchange cavity through the exhaust water pipe (6), and the water flows into multiple water storage layers in sequence through the through hole (51); S2: During the operation of the reactor core, the internal air pressure of the heat exchange cavity is stabilized by an external air pump connected through the exhaust water supply pipe (6).

12. The method according to claim 11, characterized in that, Step S1 includes: When the water level monitoring device (10) in the bottommost water storage layer detects that the water level has reached the preset value, the external water pump is turned off.

13. The method according to claim 11, characterized in that, Step S2 includes: Based on the temperature data of the water storage compartment obtained by the temperature monitoring device (11), the air pump connected to the air inlet pipe (21) is adjusted to control the gas flow rate in different water storage compartments.

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