CN204596432U - A kind of Passive containment cooling system with heat pipe drainage set - Google Patents

Abstract

The utility model provides a passive containment cooling system with a heat pipe liquid guiding device, the system includes: the system includes an inner containment, an outer containment and a cooling device arranged on the top of the outer containment, the inner containment The heat pipe liquid guide device installed on the containment vessel, and the flow guide device provided between the inner containment vessel and the outer containment vessel to guide the direction of air flow, the coolant is sprayed from the top to form a liquid film on the inner containment vessel , through the heat pipe liquid guide device, on the one hand, it can suppress the breakage of the liquid film, improve the heat exchange efficiency between the liquid film and the air, and thereby discharge the heat on the surface of the containment vessel; The heat on the surface of the containment is introduced into the heat exchange space between the inner containment and the outer containment and finally discharged into the containment, thus completing the utility model; the passive containment cooling system provided with the heat pipe liquid guiding device according to the utility model It has the characteristics of high-efficiency heat exchange, safety and reliability, and wide application range.

Description

A passive containment cooling system with a heat pipe liquid guide device

technical field

The utility model relates to the technical field of nuclear reactor safety, in particular to a passive containment cooling system with a heat pipe liquid guiding device.

Background technique

The containment is the last safety barrier to prevent the leakage of radioactive materials in the event of an accident in a nuclear power plant. The large-scale advanced pressurized water reactor currently being developed in my country adopts a technology similar to AP1000. AP1000 is the third-generation nuclear power system developed by Westinghouse Corporation of the United States. It adopts a passive containment cooling system. The cooling system adopts a double-layer containment structure, the outer layer is a concrete shell, the inner layer is a steel containment The total internal volume of the containment vessel is only a few thousand cubic meters. In the case of an accident, once the high-temperature and high-pressure medium is released in the reactor, the process of temperature rise and pressure rise is relatively fast, and the pressure limit of the system design may be reached in a short period of time, resulting in an increased possibility of release of radioactive substances in the containment to the environment , the high-temperature and high-pressure medium inside the containment must be quickly eliminated. The design of the advanced pressurized water reactor AP1000 introduced a passive containment cooling system for the first time, which releases a large amount of energy to the containment in the event of coolant loss accidents and main steam pipe rupture accidents. After the accident, the pressure inside the containment increased, and the passive containment cooling system was automatically triggered after reaching the set value of the high pressure of the containment. A liquid film forms on the outer surface of the shell. The falling liquid film flow along the vertical surface has the advantages of high heat transfer coefficient, high heat flux density, and low power consumption. The integrity of the containment vessel is enhanced, which in turn increases the safety of the nuclear power plant.

Chinese patent CN102081976A discloses a large-capacity completely passive containment cooling system. The containment cooling system can use sensors to collect thermal parameters related to the containment, track the cooling process, set up multiple storage tanks above the containment to store different coolants, and select the type of coolant and adjust the flow rate of the coolant Realize the dynamic control of the containment cooling power; by using the generalized passive control unit, the start-up and the entire operation process of the containment cooling system can be completely independent of external power supply, so it has complete passive characteristics. This invention uses multiple low boiling point coolants, complicating the system and increasing construction and maintenance costs.

Due to the existence of the above problems, the inventors researched and improved the existing passive containment cooling system design technology in order to design a heat pipe with a simple structure, which can improve the heat transfer capacity of the containment wall and increase nuclear safety. Passive containment cooling system for liquid guiding devices.

Utility model content

In order to solve the above-mentioned technical problems, the present inventors have carried out intensive research and adopted the following technical scheme: the passive cooling system includes an inner containment vessel, an outer containment vessel and a cooling device arranged on the top of the outer containment vessel, and the inner containment vessel The heat pipe liquid guide device installed on the top, and the flow guide device arranged between the inner containment vessel and the outer containment vessel to guide the air flow direction, the coolant is sprayed from the top to form a liquid film on the inner containment vessel, and passes through On the one hand, the heat pipe liquid guiding device can suppress the breakage of the liquid film, improve the heat exchange efficiency between the liquid film and the air, and thereby discharge the heat on the surface of the containment vessel into the containment; The heat on the surface is introduced into the heat exchange space between the inner containment vessel and the outer containment vessel and finally discharged into the containment vessel, thereby completing the utility model.

The purpose of this utility model is to provide the following aspects:

(1) A passive containment cooling system with a heat pipe liquid guiding device, characterized in that the system includes an inner containment vessel 3, an outer containment vessel 5 and a cooling device arranged on the top of the outer containment vessel 5, wherein,

A heat pipe liquid guiding device 4 is arranged on the outer wall of the inner containment shell 3 .

(2) According to the above-mentioned passive containment cooling system with heat pipe liquid guiding device, it is characterized in that there are one or more heat pipe liquid guiding devices 4 , which are shaped like ribs and run along the inner containment 3 The circumferential direction of the outer wall is arranged in a quasi-annular shape.

(3) According to the above-mentioned passive containment cooling system with heat pipe liquid guiding device, it is characterized in that the heat pipe liquid guiding device 4 is arranged at intervals along predetermined positions on the outer wall of the inner containment shell 3 .

(4) According to the above-mentioned passive containment cooling system with heat pipe liquid guiding device, it is characterized in that the cross-sectional structure of the heat pipe liquid guiding device 4 is a rectangle, an inverted trapezoid, an inverted triangle or an approximate inverted triangle.

(5) According to the above-mentioned passive containment cooling system with a heat pipe liquid conducting device, it is characterized in that the heat pipe liquid conducting device 4 includes an outer heat conducting layer 43 and an inner liquid absorbing and returning layer 44 .

(6) According to the above passive containment cooling system with heat pipe liquid conducting device, it is characterized in that the heat transfer medium in the heat pipe liquid conducting device 4 is preferably a superconducting medium.

(7) According to the above-mentioned passive containment cooling system with a heat pipe liquid guiding device, it is characterized in that the internal liquid absorption and return layer 44 is made of foamed metal or nanoscale metal.

(8) According to the above-mentioned passive containment cooling system with a heat pipe liquid guiding device, it is characterized in that the metal is copper.

According to the passive containment cooling system provided by the utility model with a heat pipe liquid guiding device, it has the following beneficial effects:

(1) The passive containment cooling system with heat pipe liquid guiding device provided by the utility model suppresses liquid film rupture through the comprehensive characteristics of high-efficiency heat conduction and timely liquid discharge of the heat pipe liquid guiding device, and has high-efficiency heat transfer and non-active Active safety features;

(2) The heat pipe liquid guide device in the passive containment cooling system provided by the utility model uses superconducting medium as the heat transfer medium, which realizes the rapid transfer and export of heat; and in the case of rupture of the heat pipe liquid guide device , the heat from the containment wall surface can also be exported through the external heat conduction layer of the heat pipe liquid guiding device, so that the containment operation is reliable and safe;

(3) In the utility model, the heat pipe liquid guide device is not affected by gravity, capillary force, etc., and has good design flexibility, so that the passive containment cooling system has the characteristics of simple structure and convenient installation;

(4) The passive containment cooling system provided by the utility model has a wide range of applications, not only for AP1000, but also for other containment cooling systems.

Description of drawings

Fig. 1 shows a schematic structural view of a passive containment cooling system with a heat pipe liquid guiding device according to a preferred embodiment of the present invention;

Fig. 2 shows a schematic structural view of a heat pipe liquid guiding device according to a preferred embodiment of the present invention;

Fig. 3 shows a schematic cross-sectional shape diagram of a heat pipe liquid guiding device according to a preferred embodiment of the present invention.

Explanation of reference numbers:

1- Coolant storage tank

2-Spray equipment

3- Inner containment

4-Heat pipe liquid guide device

41-Hot end

42-cold end

43-External Thermal Conductive Layer

44-Internal absorbent return layer

5- Outer containment

6- Air inlet

71 - Air drop channel

72 - Air Ascent Channel

8- deflector

9- Air outlet

10-Condensation collection device

Detailed ways

The following describes the utility model in detail, and the features and advantages of the utility model will become clearer and clearer along with these descriptions.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In the utility model, the containment vessel refers to the containment vessel of the nuclear reactor, which is the outermost building of the pressurized water reactor, and refers to the shell building containing most of the systems and equipment of the nuclear steam supply system, used to accommodate the reactor pressure vessel and some The safety system (including the main system of the primary circuit, equipment and shutdown cooling system) completely isolates it from the external environment, and it is expected to realize the function of a safety protection barrier. The thickness is 0.5m ~ 1m, the height is about 60 ~ 70m, and its strength is designed according to the seismic class I; the containment shell is divided into single-layer and double-layer shells according to the structure, and the inner layer of the double-layer shell is called the main containment shell, which mainly withstands accidents. Pressure, the outer layer is called the secondary containment, which acts as a biological shield and protection; there is an annular cavity between the two layers, which can maintain a certain negative pressure, so that the radioactive substances inside the nuclear power plant are not easy to leak to the outside.

The passive containment cooling system refers to that after the loss of coolant and the rupture of the main steam pipeline, etc., the pressure inside the containment increases, and after reaching the high pressure set value of the containment, there is no need to rely on The system that performs its cooling and heat dissipation functions through external input can transfer the heat in the containment vessel to the environment through a series of energy transfers, reducing the internal pressure of the containment vessel and ensuring the integrity of the containment vessel.

In a preferred embodiment according to the present utility model, as shown in Fig. 1, the system includes an inner containment vessel 3, an outer containment vessel 5 and a cooling device arranged on the top of the outer containment vessel 5, wherein, in the A heat pipe liquid guiding device 4 is arranged on the outer wall of the inner containment vessel 3. The containment vessel described in the utility model is preferably a containment vessel with a double shell, which is composed of an inner containment vessel 3 and an outer containment vessel 5. A heat pipe liquid guiding device 4 is provided on the outer wall of the inner containment shell 3, and an air inlet 6 and an air outlet 9 are respectively arranged on the upper side and the top of the outer wall of the outer containment shell 5; in the present utility model, the outer layer The containment vessel 5 is preferably a concrete containment vessel, and the material of the concrete containment vessel is preferably prestressed concrete. The prestressed concrete is to compensate for the premature cracking of the concrete. Before the component is used, a prestress is given to the concrete in advance. That is, in the tensile area of the concrete, the steel bar is stretched by artificial force, and the retractive force of the steel bar is used to make the concrete tension area pre-stressed. When the component bears the tensile force generated by the external load, it is first offset The pre-stress in the concrete in the tension area increases with the load to make the concrete stretch, which limits the elongation of the concrete, delays or prevents cracks from appearing, and the prestressed concrete is used in the outer layer of the utility model. In the shell 5, the safety of the passive safety cooling system is greatly increased.

In this utility model, when describing the commonality of the inner containment vessel and the outer containment vessel, the containment vessel is used as the general term for both.

In the utility model, the heat pipe liquid guiding device 4 makes full use of the heat conduction principle and the rapid heat transfer properties of the heat transfer medium, and quickly transfers the heat of the heating object to the heat source through the heat pipe, and its heat conduction capacity exceeds that of any known metal. The thermal conductivity is to use the phase change process of the heat transfer medium to evaporate at the hot end and condense at the cold end to conduct heat quickly, that is, one end of the heat pipe is the evaporation end and the other end is the condensation end. When one end of the heat pipe is heated, the heat transfer in the heat pipe The medium vaporizes quickly, and the steam flows to the other end under the power of thermal diffusion, and condenses at the cold end to release heat, and the liquid heat transfer medium flows back to the hot end along the tube wall by capillary action, and the cycle continues until the temperature at both ends of the heat pipe Equally, this cycle is carried out quickly, and heat can be continuously conducted away.

In a preferred embodiment, there are one or more heat pipe liquid guiding devices 4, which are shaped like ribs and arranged in a ring-like shape along the circumferential direction of the outer wall of the inner containment 3. The fins mentioned above are fins, which are often used in heat exchange equipment. The use of fins can increase the heat transfer area, reduce the thermal resistance of convective heat transfer, and enhance the heat transfer capacity of the equipment. In the utility model, such a structure has It helps to enhance the air turbulence between the adjacent heat pipe liquid conduction devices 4, and enhance the effect of air convection heat transfer; a quasi-annular arrangement is adopted, that is, the circumferential interval of the outer wall of the inner containment shell 3 or the heat pipe liquid conduction devices 4 are arranged continuously , it is preferable to arrange the heat pipe liquid guide device 4 at intervals along the outer wall of the inner containment shell 3, which can increase the disturbance degree of the air and discharge the heat into the containment shell. In the present invention, the heat pipe liquid guide device The number of 4 is preferably multiple. When designing the system, according to the heat dissipation of the inner containment 3 and the size of the installation space between the inner containment 3 and the outer containment 5, multiple heat pipes can be selected. The liquid device 4 forms a heat exchange device according to a predetermined arrangement. During operation, if the heat pipe liquid conduction device 4 is damaged, the heat on the wall surface of the inner containment 3 can be conducted out through the outer heat conduction layer 43 of the heat pipe liquid conduction device 4, and the operation reliability is high.

In a further preferred embodiment, the heat pipe liquid guiding device 4 is arranged at intervals along predetermined positions on the outer wall of the inner containment shell 3, and the predetermined positions refer to setting according to different temperature regions on the surface of the inner containment shell 3. The arrangement position of the heat pipe liquid guiding device 4, because the passive containment cooling system is mainly used in breaches and other accidents, prevents fluid from being sprayed out at breaches from causing over-temperature and over-pressure in the containment. After the breach fluid is ejected, the pressure drops sharply and turns into a high-temperature gas, which flows from bottom to top, and most of it contacts the top of the inner containment 3. Therefore, in terms of the surface temperature of the inner containment 3, the top and The upper part of the outer wall is a high temperature zone; the middle and upper part of the outer wall is a medium temperature zone; the lower part of the outer wall is a low temperature zone.

The top of the inner containment vessel 3: On the one hand, due to the multi-spray point design of the spray equipment, it can ensure the uniform distribution of the liquid film; on the other hand, even if the coolant flows from high temperature to low temperature under the action of thermocapillary force, it will The spraying equipment replenishes new coolant fluid in time. If the heat pipe liquid guide device 4 is installed, the coolant flow will be hindered. Preferably, the heat pipe liquid guide device 4 is not installed on the top of the inner containment shell 3 .

On the upper part of the outer wall, the vertical temperature gradient on the wall surface of the inner containment shell 3 is large. Preferably, 16 heat pipe liquid guide devices 4 are arranged at equal intervals along the outer wall of the inner containment shell 3. The heat pipe liquid guide devices 4 are integrally Form a quasi-annular shape; in the middle and lower parts of the outer wall, the vertical temperature gradient of the inner containment wall is small. Preferably, 12 heat pipe liquid guide devices 4 are arranged at equal intervals along the outer wall of the inner containment 3, and the heat pipe The whole liquid guiding device 4 forms a ring-like shape.

The quasi-annulus mentioned in the utility model refers to that the heat pipe liquid guiding device 4 is arranged in a spiral shape or arranged in a plurality of quasi-circular shapes along the outer wall of the inner containment vessel, and each adjacent two quasi-circular rings are arranged vertically There is a predetermined spacing in the vertical direction. Preferably, the heat pipe liquid guiding device 4 is arranged in such a way that every two adjacent rings have a predetermined spacing in the vertical direction, which can be based on the size of the entire outer wall and the heat dissipation requirements. Make specific settings.

In a preferred embodiment, as shown in FIG. 3 , the cross-sectional structure of the heat pipe liquid guiding device 4 is a rectangle, an inverted trapezoid, an inverted triangle or an approximate inverted triangle. The approximate inverted triangle means that the three sides of the triangle are not necessarily All are straight lines, and can have sides with radians. Such a narrow bottom and wide top structure, on the one hand, is conducive to reducing the air flow resistance in the air ascending channel 72, and increasing its turbulence, so that it is compatible with the jet from the jet. The liquid film formed by the coolant sprayed from the shower device 2 is fully contacted, which increases the convective heat transfer area and performs efficient heat exchange. Finally, the heat of liquid film evaporation is discharged from the air outlet. On the other hand, the thickened liquid film can be cut off in time. The film reduces the difference in thickness of the liquid film at different positions, prolongs the time for the liquid to move from a thinner part to a thicker part due to thermal capillary action, balances the temperature inhomogeneity of the inner containment 3 wall, and suppresses the occurrence of thermal capillary phenomenon , to avoid the rupture of the liquid film; at the same time, it can also protect the wall surface of the inner containment vessel 3 from long-term corrosion and erosion of the liquid. The heat from the outer surface of the containment vessel 3 is exported, and it can be used to export the heat from the outer surface of the inner containment vessel 3 under the condition of uniform wall temperature.

In a preferred embodiment, as shown in Fig. 3 and Fig. 1, the heat pipe liquid guiding device 4 includes an outer heat conducting layer 43 and an inner liquid absorbing and reflowing layer 44. The heat of the inner containment vessel 3 can be exported through the outer heat conduction layer 43, followed by the airflow of the air ascending channel 73 and discharged from the air outlet 9, and the inner liquid absorption and return layer 44 is made of foamed metal or nano-scale metal. The metal is preferably copper, ie preferably made of nano-copper wire mesh. Since the start-up performance and isothermal performance of the nano-copper wire mesh are better than those of ordinary wire mesh, the total thermal resistance is smaller than that of ordinary wire mesh, which is conducive to enhancing the heat transfer performance of the liquid guiding device 4 .

In another preferred embodiment, as shown in Figure 2, the heat transfer medium in the heat pipe liquid guide device 4 is a superconducting medium, and the material of the superconducting medium is preferably an inorganic salt superconducting material, such as Nb ₃ Sn, V ₃ Ga or YBa ₂ Cu ₃ O ₇ , etc., the superconducting medium makes the thermal conductivity of the heat pipe liquid guiding device 4 about 10,000 times that of ordinary metals, ten times that of conventional heat pipes, and can quickly transfer heat, effectively Inhibit the uneven temperature distribution on the outer surface of the inner containment vessel 3; secondly, the heat pipe liquid guiding device 4 uses the high-frequency vibration of the superconducting medium to conduct heat, so that the inside of the tube shell is not easy to scale, freeze and crack, and the failure rate is low; moreover , so that the heat pipe liquid guide device 4 has wide temperature adaptability, can work normally at temperatures between -70°C and 1700°C, and fully adapts to the working range of the passive containment cooling system. In addition, it has superconducting The heat pipe liquid conducting device 4 of the medium is not affected by gravity, capillary force, etc., has good design flexibility, and is not limited by the installation position during installation.

In the utility model, the working process of the heat pipe liquid guiding device 4 is as follows: at the hot end 41, the superconducting medium receives the heat from the high temperature side of the wall of the inner containment 3, and rapidly transfers the heat energy at a speed similar to sound waves by means of molecular vibrations to the cold end 42, and transported to the low temperature side of the inner containment 3 wall, after the superconducting medium condenses and releases heat at the cold end 42 of the heat pipe liquid guiding device 4, it flows back along the liquid absorption and return layer 44 under the action of capillary force to The hot end 41 circulates like this to complete the rapid transfer of heat.

In a preferred embodiment, the cooling device includes a coolant storage tank 1 and a spraying device 2 below it, and the coolant storage tank 1 is used to store and circulate supplementary coolant to avoid The spray equipment is equipped with a flow distribution control device, which can continuously spray the coolant to the surface of the containment evenly, thereby promoting the heat exchange between the coolant and the surface of the inner containment.

In a preferred embodiment, a flow guide device 8 is provided between the inner containment vessel 3 and the outer containment vessel 5 to guide the direction of air circulation, and the shape of the flow guide device is selected from plate shape, column shape or Spherical, preferably plate-shaped, through the air guiding device, the air entering from the air inlet 6 can be smoothly and evenly introduced from the air descending passage 71 into the air ascending passage 72 for heat exchange and transfer.

In a preferred embodiment, a condensate collection device 10 is also provided below the flow guide device 8, and there is a predetermined distance between the condensation collection device 10 and the flow guide device 8, and the predetermined distance is 3m ~5m; liquid level monitoring and control equipment is set in the condensation collection device 10, and a recirculation circuit is connected to the outside of the coolant storage tank 1. When the liquid level in the condensation collection device 10 is higher than the set value, the The liquid level monitoring and control equipment sends out a signal to open the recirculation valve, and the condensate is transported to the coolant storage tank by the circulation pump through the recirculation circuit.

The working process of the passive containment cooling system with heat pipe liquid guiding device described in the utility model is as follows: the coolant is provided by the coolant storage tank 1, and is evenly sprayed on the outer surface of the inner containment vessel 3 by the spraying device 2. A liquid film is formed, and the liquid film is divided into multiple liquid film layers by the heat pipe liquid guide device 4, which suppresses the breakage of the liquid film; air enters through the air inlet 6, and enters the air ascending channel through the air guide device 8 along the air descending channel 71 72, enter the heat exchange space of the inner containment vessel 3 and the outer containment vessel 5, contact the liquid film layer on the outer surface of the inner containment vessel 3 and the heat pipe liquid guiding device 4, conduct heat transfer through heat convection, and not be covered by the liquid film The heat on the surface of the covered inner containment vessel 3 is directly led out to the heat exchange space between the inner containment vessel 3 and the outer containment vessel 5 by the heat pipe liquid guiding device 4 . The heat entering the inner containment 3 passes through the steam condensation on the inner wall of the inner containment 3, the heat conduction on the wall, and the evaporation of the liquid film on the outer surface in sequence, and is transferred to the heat exchange space between the inner containment 3 and the outer containment 5. The outlet 9 is discharged, and a small part of the outer surface of the inner containment 3 that is not covered by the liquid film transfers heat to the air entering through the air inlet 6 through thermal convection and heat radiation. The air is heated and flows upward, carrying heat from the air outlet 9 External environment; when serious accidents such as the loss of coolant by a large breach occur, the heat entering the inner containment shell 3 can also be exported through the outer heat conducting layer 43 of the heat pipe liquid guiding device 4, followed by the airflow of the air ascending channel 73 and discharged from the air outlet 9 .

The heat convection refers to the phenomenon that heat is transmitted from one part of the space to another through the flow medium. In the present invention, the heat on the wall surface of the inner containment vessel 3 is transferred to the air through the air entering through the air inlet 6. Exit 9, entering the external environment; the thermal radiation refers to the phenomenon that objects radiate electromagnetic waves due to their temperature, which is one of the three ways of heat transfer. Any object, as long as the temperature is higher than 0K, will continuously radiate to the surrounding space Thermal radiation is emitted, that is, the heat in the inner containment vessel 3 can be radiated from the inner wall to the heat exchange space between the inner containment vessel 3 and the outer containment vessel 5, and then discharged from the containment vessel through air flow and enters the external environment.

According to the passive containment cooling system provided by the utility model with a heat pipe liquid guiding device, it has the following beneficial effects:

(1) The passive containment cooling system with heat pipe liquid guiding device provided by the utility model suppresses liquid film rupture through the comprehensive characteristics of high-efficiency heat conduction and timely liquid discharge of the heat pipe liquid guiding device, and has high-efficiency heat transfer and non-active Active safety features;

(2) The heat pipe liquid guide device in the passive containment cooling system provided by the utility model uses superconducting medium as the heat transfer medium, which realizes the rapid transfer and export of heat; and in the case of rupture of the heat pipe liquid guide device , the heat from the containment wall surface can also be exported through the external heat conduction layer of the heat pipe liquid guiding device, so that the containment operation is reliable and safe;

(3) In the utility model, the heat pipe liquid guide device is not affected by gravity, capillary force, etc., and has good design flexibility, so that the passive containment cooling system has the characteristics of simple structure and convenient installation;

(4) The passive containment cooling system provided by the utility model has a wide range of applications, not only for AP1000, but also for other containment cooling systems.

In Fig. 1 of the present utility model, the dotted arrows indicate the direction of air rising or falling, the solid arrows indicate the spraying direction of the coolant, and the arrows in Fig. 2 indicate the flow direction of the heat transfer medium, and the above arrows have no other meanings.

In the description of the utility model, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", "lower" etc. is based on the orientation or positional relationship under the working state of the utility model, It is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

The utility model has been described in detail above in conjunction with specific implementations and illustrative examples, but these descriptions should not be construed as limiting the utility model. Those skilled in the art understand that without departing from the spirit and scope of the utility model, various equivalent replacements, modifications or improvements can be made to the technical solution of the utility model and its implementation, and these all fall within the scope of the utility model . The scope of protection of the utility model shall be determined by the appended claims.

Claims (4)

1. A passive containment cooling system with a heat pipe liquid guiding device, characterized in that: the system comprises an inner containment (3), an outer containment (5) and a top of the outer containment (5) cooling device, in which, A heat pipe liquid guiding device (4) is arranged on the outer wall of the inner containment shell (3). The circumferential direction of the outer wall of the shell (3) is arranged in a quasi-annular shape. 2. The passive containment cooling system with a heat pipe liquid conducting device according to claim 1, characterized in that the heat pipe liquid conducting device (4) is arranged at intervals along predetermined positions on the outer wall of the inner containment vessel (3) . 3. The passive containment cooling system with heat pipe liquid guiding device according to claim 1 or 2, characterized in that, the cross-sectional structure of the heat pipe liquid guiding device (4) is rectangular, inverted trapezoidal, inverted triangular or approximately inverted triangle. 4. The passive containment cooling system with heat pipe liquid guiding device according to claim 1 or 2, characterized in that, the heat pipe liquid guiding device (4) comprises an external heat conducting layer (43) and an internal liquid absorption and return layer (44).