Heat extraction system for a passive marine nuclear power plant containment

Abstract

The present application relates to the technical field of marine nuclear power platform, and provide a kind of passive marine nuclear power platform containment heat export system, comprising: spraying mechanism, setting in containment, first pressure sensor and first temperature sensor are arranged in containment;Mixing box, which is connected with the spraying mechanism through first pipeline;Gas storage tank, which is connected with the mixing box through second pipeline;Control mechanism, for controlling first pipeline and second pipeline conduction according to the signal sent by first pressure sensor and / or first temperature sensor.The passive marine nuclear power platform containment heat export system provided by the present application can control first pipeline and second pipeline conduction when the temperature and / or pressure in containment reaches the preset value, so that the liquid in the mixing box enters the spraying mechanism under the driving of high-pressure gas in the gas storage tank, thereby cooling the containment, thereby avoiding the containment from being damaged due to overpressure, radioactive material from polluting the environment and causing harm to the human body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marine nuclear power platform, and particularly relates to a heat export system of a passive marine nuclear power platform containment. BACKGROUND

[0002] The containment refers to the most peripheral building containing a nuclear power plant reactor, part of auxiliary systems and special safety facilities, realizing isolation of a primary loop system from an external environment, so as to complete protection of the external environment and the public under normal and accident conditions of the nuclear power plant.

[0003] When a break accident occurs in a primary loop pipeline of the nuclear power plant, a large amount of high-temperature and high-pressure water vapor is sprayed into the containment, causing a sharp rise in the pressure and temperature in the containment, and if no remedial measures are taken, the containment will be damaged due to overpressure, causing radioactive substances in the primary loop to be released into the environment, resulting in radioactive pollution. In order to protect the safety of the public and the environment, it is crucial to provide a heat export system of a passive marine nuclear power platform containment. SUMMARY

[0004] The present application provides a heat export system of a passive marine nuclear power platform containment, which can prevent the containment from being damaged due to overpressure.

[0005] The present application provides a heat export system of a passive marine nuclear power platform containment, which comprises: a spraying mechanism, the spraying mechanism is arranged in the containment, and a first pressure sensor and a first temperature sensor are arranged in the containment; a mixing box, the mixing box is connected with the spraying mechanism through a first pipeline; a gas storage tank, the gas storage tank is connected with the mixing box through a second pipeline; and a control mechanism, the control mechanism is used for controlling the first pipeline and the second pipeline to be conducted according to signals sent by the first pressure sensor and / or the first temperature sensor.

[0006] According to the heat export system of the passive marine nuclear power platform containment provided by the present application, the control mechanism comprises: a first electromagnetic valve, the first electromagnetic valve is arranged in the first pipeline; a second electromagnetic valve, the second electromagnetic valve is arranged in the second pipeline; and a controller, the controller is communicatively connected with the first pressure sensor and the first temperature sensor, and the controller is electrically connected with the first electromagnetic valve and the second electromagnetic valve.

[0007] According to the heat export system of the passive marine nuclear power platform containment provided by the present application, the system further comprises a gas equalizing plate, and the gas equalizing plate is arranged in the mixing box.

[0008] The heat export system of the passive offshore nuclear power platform safety enclosure provided by the application further comprises a second pressure sensor, which is arranged on the gas storage tank and in communication connection with the controller; a compressor, which is connected with the gas storage tank through a third pipeline and electrically connected with the controller; a first electric valve, which is arranged on the third pipeline and electrically connected with the controller; and a first stop valve, which is arranged on the third pipeline and located between the first electric valve and the compressor.

[0009] The heat export system of the passive offshore nuclear power platform safety enclosure provided by the application further comprises a first liquid level sensor, which is arranged on the mixing tank and in communication connection with the controller; a liquid storage tank, which is connected with the mixing tank through a fourth pipeline; and a third electromagnetic valve, which is arranged on the fourth pipeline and electrically connected with the controller.

[0010] The heat export system of the passive offshore nuclear power platform safety enclosure provided by the application further comprises a second liquid level sensor, which is arranged on the liquid storage tank and in communication connection with the controller; a fifth pipeline, which is connected with the liquid storage tank and an external water source at two ends; a second electric valve, which is arranged on the fifth pipeline and electrically connected with the controller.

[0011] The heat export system of the passive offshore nuclear power platform safety enclosure provided by the application further comprises a pump, which is arranged on the fifth pipeline; and a second stop valve, which is arranged on the fifth pipeline and located between the pump and the second electric valve.

[0012] The heat export system of the passive offshore nuclear power platform safety enclosure provided by the application further comprises a plurality of nozzles, which are arranged around the safety enclosure, and each nozzle is in the shape of a pinhole.

[0013] The heat export system of the passive offshore nuclear power platform safety enclosure provided by the application further comprises a third stop valve, which is arranged on the first pipeline and located between the mixing tank and the first electromagnetic valve.

[0014] The heat export system of the passive marine nuclear power platform safety shell provided by the embodiment of the present application can control the first pipeline and the second pipeline to be conducted when the temperature and / or pressure in the safety shell reaches the preset value, so that the liquid in the mixing box enters the spraying mechanism under the driving of the high-pressure gas in the gas storage tank, thereby cooling the safety shell, and damage to the environment and human body caused by overpressure damage of the safety shell is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0016] Figure 1 is a structural schematic diagram of the heat export system of the passive marine nuclear power platform safety shell provided by the present application;

[0017] Reference signs:

[0018] 10: safety shell; 11: first pressure sensor; 12: first temperature sensor;

[0019] 20: spraying mechanism; 30: mixing box; 31: gas distribution plate;

[0020] 32: first liquid level sensor; 40: gas storage tank; 41: second pressure sensor;

[0021] 42: compressor; 50: liquid storage tank; 51: second liquid level sensor;

[0022] 100: first pipeline; 101: first electromagnetic valve; 102: third stop valve;

[0023] 200: second pipeline; 201: second electromagnetic valve; 202: fourth stop valve;

[0024] 300: third pipeline; 301: first electric valve; 302: first stop valve;

[0025] 400: fourth pipeline; 401: third electromagnetic valve; 500: fifth pipeline;

[0026] 501: second electric valve; 502: second stop valve; 503: pump. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0028] The terms "first" and "second" in the specification and claims of this invention may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] The following is combined with Figure 1 The present invention describes a heat removal system for the containment vessel of a passive marine nuclear-powered platform.

[0030] like Figure 1 As shown, in one embodiment of the present invention, the heat removal system of the containment vessel of a passive marine nuclear power platform includes: a spray mechanism 20, a mixing tank 30, a gas storage tank 40, a control mechanism, a first pressure sensor 11, a first temperature sensor 12, a first pipeline 100, and a second pipeline 200.

[0031] A spray mechanism 20 is mounted on the containment vessel 10 to cool it. A first pressure sensor 11 and a first temperature sensor 12 are installed inside the containment vessel 10 to detect the pressure and temperature within it. A mixing tank 30 is connected to the spray mechanism 20 via a first pipeline 100, and a gas storage tank 40 is connected to the mixing tank 30 via a second pipeline 200. A control mechanism is used to control the connection of the first pipeline 100 and the second pipeline 200 based on signals received from the first pressure sensor 11 and / or the first temperature sensor 12.

[0032] Specifically, the mixing tank 30 initially stores a certain amount of deionized water. When a rupture occurs in the primary loop system, a large amount of steam is injected into the containment vessel 10, causing the pressure and temperature inside the containment vessel 10 to rise. When the pressure and / or temperature inside the containment vessel 10 reaches a preset safety value, the first pressure sensor 11 and / or the first temperature sensor 12 send a signal to the control mechanism. The control mechanism controls the first pipeline 100 and the second pipeline 200 to be connected. The high-pressure gas in the gas storage tank 40 enters the mixing tank 30 through the second pipeline 200. Driven by the high-pressure gas, the deionized water in the mixing tank 30 enters the spray mechanism 20 through the first pipeline 100 and is sprayed onto the outer surface of the containment vessel 10. It evaporates on the surface of the containment vessel 10, thereby carrying away the heat inside the containment vessel 10.

[0033] Further, in an embodiment of the present application, the spraying mechanism 20 can include a plurality of nozzles, which are uniformly distributed on the surface of the containment vessel 10 to cool the containment vessel 10.

[0034] Further, in an embodiment of the present application, the control mechanism includes a control valve arranged on the first pipeline 100 and the second pipeline 200, and a controller electrically connected with the control valve, when the pressure and / or temperature in the containment vessel 10 reaches a preset safety value, the first pressure sensor 11 and / or the first temperature sensor 12 sends a signal to the controller, the controller controls the valve to open, so that the first pipeline 100 and the second pipeline 200 are conducted, so that the deionized water in the mixing tank 30 enters the spraying mechanism 20, thereby spraying and cooling the containment vessel 10.

[0035] The heat export system of the passive offshore nuclear power platform containment vessel provided by the embodiment of the present application can control the first pipeline and the second pipeline to be conducted when the temperature and / or pressure in the containment vessel reaches a preset value, so that the liquid in the mixing tank enters the spraying mechanism under the driving of the high-pressure gas in the gas storage tank, thereby cooling the containment vessel, and thus avoiding the overpressure damage of the containment vessel, the pollution of the environment by radioactive substances, and the harm to human bodies.

[0036] Further, in an embodiment of the present application, the control mechanism includes a first electromagnetic valve 101, a second electromagnetic valve 201, and a controller. The first electromagnetic valve 101 is arranged on the first pipeline 100, the second electromagnetic valve 201 is arranged on the second pipeline 200, and the controller is in communication connection with the first pressure sensor 11 and the first temperature sensor 12, and is in electrical connection with the first electromagnetic valve 101 and the second electromagnetic valve 201.

[0037] Specifically, when the pressure and / or temperature in the containment vessel 10 reaches a preset safety value, the first pressure sensor 11 and / or the first temperature sensor 12 sends a signal to the controller, the controller controls the first electromagnetic valve 101 and the second electromagnetic valve 201 to open, so that the first pipeline 100 and the second pipeline 200 are conducted, thereby making the liquid in the mixing tank 30 enter the spraying mechanism 20 to spray and cool the containment vessel 10.

[0038] As shown in FIG. 1, Figure 1 In an embodiment of the present application, the heat export system of the passive offshore nuclear power platform containment vessel further includes a gas distribution plate 31 arranged in the mixing tank 30, which is used to uniformly distribute the high-pressure gas entering the mixing tank 30.

[0039] As shown in FIG. 1, Figure 1As shown, in one embodiment of the present invention, the heat removal system of the containment vessel of a passive marine nuclear power platform further includes: a second pressure sensor 41, a compressor 42, a third pipeline 300, a first electric valve 301, and a first shut-off valve 302. The second pressure sensor 41 is disposed within the gas storage tank 40 and is used to detect the gas pressure within the gas storage tank 40. The second pressure sensor 41 is communicatively connected to the controller. The compressor 42 is connected to the gas storage tank 40 via the third pipeline 300. The first electric valve 301 is disposed within the third pipeline 300 and is electrically connected to the controller. The first shut-off valve 302 is disposed within the third pipeline 300 and is located between the first electric valve 301 and the compressor 42.

[0040] Specifically, when the heat removal system is in standby mode and the pressure inside the gas storage tank 40 decreases due to leakage; or when the heat removal system has been running for a long time and the high-pressure gas inside the gas storage tank 40 is consumed, resulting in a low pressure inside the gas storage tank 40, when the second pressure sensor 41 detects that the pressure inside the gas storage tank 40 is lower than a preset value, the second pressure sensor 41 sends a first signal to the controller. The controller controls the first electric valve 301 to open and controls the compressor 42 to start. The compressor 42 starts working and delivers high-pressure gas into the gas storage tank 40. When the pressure inside the gas storage tank 40 reaches the preset value, the second pressure sensor 41 sends a second signal to the controller, and the controller controls the first electric valve 301 and the compressor 42 to close. Furthermore, to prevent gas in the mixing box 30 from flowing back into the gas storage tank 40 when the first electric valve 301 is open, a first shut-off valve 302 is also provided on the third pipeline 300.

[0041] The heat removal system for the containment vessel of a passive marine nuclear power platform provided in this embodiment of the invention, by setting a second pressure sensor, a compressor, a first electric valve and a first shut-off valve, can promptly replenish the pressure in the gas storage tank when the pressure inside the gas storage tank is low, thus avoiding the problem of insufficient gas pressure in the gas storage tank when the containment vessel needs to be sprayed for cooling, resulting in poor spraying effect of the spraying mechanism.

[0042] like Figure 1 As shown, in one embodiment of the present invention, the heat removal system of the containment vessel of a passive marine nuclear power platform further includes: a first liquid level sensor 32, a liquid storage tank 50, a fourth pipeline 400, and a third solenoid valve 401. The first liquid level sensor 32 is disposed in the mixing tank 30 and is communicatively connected to the controller. The liquid storage tank 50 is connected to the mixing tank 30 via the fourth pipeline 400. The third solenoid valve 401 is disposed in the fourth pipeline 400 and is electrically connected to the controller.

[0043] Specifically, when the heat removal system is in a long-term standby state, and the liquid level in the mixing tank 30 drops due to leakage, evaporation, or other reasons; or when the liquid level in the mixing tank 30 drops due to the consumption of high-pressure deionized water inside the mixing tank 30, the first liquid level sensor 32 detects that the liquid level in the mixing tank 30 is lower than a preset value. The first liquid level sensor 32 then sends a first signal to the controller, which controls the third solenoid valve 401 to open, allowing liquid from the storage tank 50 to enter the mixing tank 30 under gravity. When the liquid level in the mixing tank 30 reaches the preset value, the first liquid level sensor 32 sends a second signal to the controller, which then controls the third solenoid valve 401 to close.

[0044] Furthermore, in one embodiment of the present invention, the liquid in the storage tank 50 is water.

[0045] Furthermore, in one embodiment of the present invention, the heat removal system of the passive marine nuclear power platform containment vessel further includes: a second liquid level sensor 51, a fifth pipeline 500, and a second electric valve 501. The second liquid level sensor 51 is disposed inside the liquid storage tank 50 and is communicatively connected to the controller. The two ends of the fifth pipeline 500 are respectively connected to the liquid storage tank 50 and an external water source. The second electric valve 501 is disposed in the fifth pipeline 500 and is electrically connected to the controller.

[0046] Specifically, when the heat removal system is in a long-term standby state, and the water level in the storage tank 50 drops due to leakage, evaporation, or other reasons, when the second level sensor 51 detects that the water level in the storage tank 50 is lower than a preset value, the second level sensor 51 sends a first signal to the controller. The controller then controls the second electric valve 501 to open, connecting an external water source to the storage tank 50 to replenish the liquid. When the second level sensor 51 detects that the water level in the storage tank 50 has reached the preset value, the second level sensor 51 sends a second signal to the controller, and the controller then controls the second electric valve 501 to close.

[0047] Furthermore, in one embodiment of the present invention, the heat removal system of the containment vessel of the passive marine nuclear power platform further includes: a pump 503 and a second shut-off valve 502, both of which are installed on the fifth pipeline 500. The pump 503 is used to pump external water into the storage tank 50, and the second shut-off valve 502 is located between the pump 503 and the second electric valve 501 to prevent the liquid in the storage tank 50 from flowing back out.

[0048] like Figure 1 As shown, in one embodiment of the present invention, the spraying mechanism 20 includes a plurality of nozzles disposed around the containment 10, each nozzle being pinhole shaped to facilitate the formation of droplets.

[0049] likeFigure 1 As shown, in one embodiment of the present application, the heat export system of the passive marine nuclear power platform containment vessel further comprises a third stop valve 102, which is arranged on the first pipeline 100 and located between the mixing box 30 and the first electromagnetic valve 101, so as to prevent the water in the spraying mechanism 20 from flowing back to the mixing box 30.

[0050] Further, in order to prevent the gas in the mixing box 30 from flowing to the gas storage tank 40, the second pipeline 200 is further provided with a fourth stop valve 202.

[0051] The heat export system of the passive marine nuclear power platform containment vessel provided by the embodiment of the present application can timely connect the mixing box and the spraying mechanism when the pressure and / or temperature in the containment vessel rises, so as to cool the containment vessel. When the pressure in the gas storage tank is low, the gas storage tank can be automatically inflated, and when the liquid level in the liquid storage tank is low, the liquid in the liquid storage tank can be automatically supplemented, so that there is sufficient gas pressure in the gas storage tank and sufficient liquid in the liquid storage tank at all times, and the containment vessel can be sprayed in time when the pressure and / or temperature in the containment vessel rises, thereby improving the safety performance of the containment vessel.

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat export system for a passive marine nuclear power platform containment vessel, characterized in that, The application relates to a safety device for a nuclear power plant, which comprises the following parts: a spraying mechanism arranged outside a safety shell, wherein a first pressure sensor and a first temperature sensor are arranged in the safety shell, the spraying mechanism comprises a plurality of nozzles arranged around the safety shell, and each nozzle is in a needle hole shape; a mixing box for storing deionized water, wherein the mixing box is connected with the spraying mechanism through a first pipeline; a gas storage tank for storing high-pressure gas, wherein the gas storage tank is connected with the mixing box through a second pipeline, and the gas storage tank is used for driving the deionized water in the mixing box to the spraying mechanism through the first pipeline in a pressure driving mode; a control mechanism, which is used for controlling the first pipeline and the second pipeline to be conducted according to signals sent by the first pressure sensor and / or the first temperature sensor; a gas equalizing plate arranged in the mixing box.

2. The heat export system of a passive nuclear power plant containment for offshore use according to claim 1, characterized in that, The control mechanism comprises: a first electromagnetic valve arranged in the first pipeline; a second electromagnetic valve arranged in the second pipeline; a controller, which is in communication connection with the first pressure sensor and the first temperature sensor, and is in electric connection with the first electromagnetic valve and the second electromagnetic valve.

3. The heat export system of a passive nuclear power plant containment for offshore use according to claim 2, characterized in that, Further comprising: a second pressure sensor arranged in the gas storage tank, wherein the second pressure sensor is in communication connection with the controller; a compressor connected with the gas storage tank through a third pipeline, wherein the compressor is in electric connection with the controller; a first electric valve arranged in the third pipeline, wherein the first electric valve is in electric connection with the controller; a first stop valve arranged in the third pipeline and located between the first electric valve and the compressor.

4. The heat export system of a passive nuclear power plant containment for offshore use according to claim 2, characterized in that, Further comprising: a first liquid level sensor arranged in the mixing box, wherein the first liquid level sensor is in communication connection with the controller; a liquid storage box connected with the mixing box through a fourth pipeline; a third electromagnetic valve arranged in the fourth pipeline, wherein the third electromagnetic valve is in electric connection with the controller.

5. The heat export system of a passive nuclear power plant containment for offshore use according to claim 4, characterized in that, Further comprising: a second liquid level sensor arranged in the liquid storage box, wherein the second liquid level sensor is in communication connection with the controller; a fifth pipeline, two ends of the fifth pipeline are respectively connected with the liquid storage box and an external water source; a second electric valve arranged in the fifth pipeline, wherein the second electric valve is in electric connection with the controller.

6. The heat export system of a passive nuclear power plant containment for offshore use according to claim 5, characterized in that, Further comprising: a pump arranged in the fifth pipeline; a second stop valve arranged in the fifth pipeline and located between the pump and the second electric valve.

7. The heat export system of a passive nuclear power plant containment for offshore use according to claim 2, characterized in that, Further comprising a third stop valve arranged in the first pipeline and located between the mixing box and the first electromagnetic valve.

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