Analog device and analog method suitable for micro sodium leakage

Abstract

The embodiment of the application relates to the technical field of reactor coolant leakage detection, and particularly relates to a simulation device and a simulation method suitable for trace sodium leakage. The simulation device provided by the embodiment of the application first charges liquid sodium into a liquid sodium delivery assembly by using a sodium charging and discharging assembly, then delivers the liquid sodium to a measurement assembly, and according to the weight of the liquid sodium received by the measurement assembly and the delivery time, the sodium leakage rate under the current flow rate can be determined. In this way, whether the current sodium leakage rate meets the trace sodium leakage can be determined, then the liquid sodium delivery assembly is controlled to deliver liquid sodium to the sodium leakage detection assembly according to the current flow rate, the actual trace sodium leakage working condition can be simulated, when the sodium leakage detection assembly detects the liquid sodium leakage, prompt information is output, which is beneficial to verifying the detection effect of the sodium leakage detection device, and meanwhile, the size of the sodium leakage rate can be controlled and adjusted, and the simulation device is suitable for the design and verification of sodium leakage detection assemblies under different working conditions.

Description

Technical Field

[0001] The embodiments of this application relate to the field of reactor coolant leakage detection technology, specifically to a simulation device and simulation method suitable for trace sodium leakage. Background Technology

[0002] The statements herein are provided merely as background information in connection with this application and do not necessarily constitute prior art.

[0003] The sodium-cooled fast neutron reactor (hereinafter referred to as the sodium-cooled fast reactor) is a fourth-generation reactor. Its core and circuit contain tens to hundreds of tons of high-temperature liquid sodium coolant. Sodium is chemically reactive, and a leak could cause a sodium fire accident.

[0004] In sodium-cooled fast reactors, sodium aerosols released from sodium combustion can have a significant impact on the environment, equipment, and personnel. If a sodium leak occurs in the primary circuit, the generated sodium aerosols may also lead to radioactive spread. Therefore, to ensure the stable and long-term operation of sodium-cooled fast reactors, ensuring the reliability of sodium leak detection and protection equipment has become one of the primary issues facing sodium-cooled fast reactors. Summary of the Invention

[0005] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the application. It is not intended to identify key or essential parts of the application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] In a first aspect, embodiments of this application provide a simulation device suitable for trace sodium leakage, comprising: a sodium filling and discharging assembly, a liquid sodium conveying assembly, a measuring assembly, a sodium leakage detection assembly, and a control unit. The sodium filling and discharging assembly is configured to fill the liquid sodium conveying assembly with liquid sodium; the liquid sodium conveying assembly is configured to receive the liquid sodium filled by the sodium filling and discharging assembly and then convey the liquid sodium to the measuring assembly; the measuring assembly is configured to receive the liquid sodium conveyed by the liquid sodium conveying assembly and, during the receiving process, weigh the received liquid sodium in real time; the control unit is configured to determine the leakage rate of liquid sodium at the current flow rate based on the weight of the liquid sodium obtained by the measuring assembly and the time taken for the liquid sodium conveying assembly to convey liquid sodium to the measuring assembly; the control unit is also configured to control the liquid sodium conveying assembly to convey liquid sodium to the sodium leakage detection assembly at the current flow rate; and the sodium leakage detection assembly is configured to output a prompt message when a liquid sodium leakage is detected.

[0007] The simulation device provided in the embodiments of this application first uses a sodium filling and discharging component to fill liquid sodium into a liquid sodium delivery component, and then delivers the liquid sodium to a measuring component. Based on the weight of the liquid sodium received by the measuring component and the delivery time, the sodium leakage rate at the current flow rate can be determined. This allows it to determine whether the current sodium leakage rate meets the criteria for a trace sodium leakage. Then, the liquid sodium delivery component is controlled to deliver liquid sodium to the sodium leakage detection component at the current flow rate, which can simulate the actual trace sodium leakage condition. When the sodium leakage detection component detects a liquid sodium leakage, it outputs a prompt message, which is helpful in verifying the detection effect of the sodium leakage detection device. At the same time, the sodium leakage rate can be controlled and adjusted, making it suitable for the design and verification of sodium leakage detection components under different operating conditions.

[0008] Secondly, embodiments of this application also provide a simulation method suitable for trace sodium leakage. The simulation method includes the following steps: S1, filling a liquid sodium delivery assembly with liquid sodium under a protective atmosphere; S2, delivering the liquid sodium from the liquid sodium delivery assembly to a measuring assembly; S3, receiving the liquid sodium delivered by the liquid sodium delivery assembly using the measuring assembly, and weighing the received liquid sodium in real time during the receiving process; S4, determining the leakage rate of liquid sodium at the current flow rate based on the weight of the liquid sodium obtained by the measuring assembly and the time taken for the liquid sodium delivery assembly to deliver liquid sodium to the measuring assembly; S5, determining that the current leakage rate of liquid sodium conforms to trace sodium leakage when the leakage rate at the current flow rate is less than or equal to a predetermined leakage rate; S6, controlling the liquid sodium delivery assembly to deliver liquid sodium to the sodium leakage detection assembly at the current flow rate; S7, outputting a prompt message when the sodium leakage detection assembly detects a liquid sodium leakage.

[0009] The simulation method provided in this application involves first filling a liquid sodium delivery component with liquid sodium, then delivering the liquid sodium to a measuring component. Based on the weight of the liquid sodium received by the measuring component and the delivery time, the sodium leakage rate at the current flow rate can be determined. This allows for determining whether the current sodium leakage rate meets the criteria for a trace sodium leak. Then, the liquid sodium delivery component is controlled to deliver liquid sodium to the sodium leak detection component at the current flow rate, simulating the actual trace sodium leak condition. When the sodium leak detection component detects a liquid sodium leak, it outputs a warning message, which is beneficial for verifying the detection effect of the sodium leak detection device. At the same time, the sodium leakage rate can be controlled and adjusted, making it suitable for the design and verification of sodium leak detection components under different operating conditions.

[0010] These and other advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0011] To further illustrate the above and other advantages and features of this application, the specific embodiments of this application will be described in more detail below with reference to the accompanying drawings. The drawings, together with the following detailed description, are included in and form a part of this specification. Elements having the same function and structure are indicated by the same reference numerals. It should be understood that these drawings only depict typical examples of this application and should not be considered as limiting the scope of this application.

[0012] Figure 1 This is a schematic diagram of a simulation device for trace sodium leakage according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a sodium delivery container according to an embodiment of this application; Figure 3 This is a schematic flowchart of a simulation method for trace sodium leakage according to an embodiment of this application.

[0013] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding.

[0014] Explanation of reference numerals in the attached figures: 10. Sodium filling and discharging assembly; 11. Sodium filling and discharging container; 12. Gas storage container; 13. Vacuum pump; 14. Fifth sodium delivery pipeline; 15. Third regulating component; 20. Liquid sodium delivery assembly; 21. Third sodium delivery pipeline; 22. Fourth sodium delivery pipeline; 23. Sodium delivery container; 231. Sodium filling port; 232. Sodium discharge port; 30. Measuring assembly; 31. Second sodium delivery pipeline; 32. Sealed measuring element; 321. Sealed container; 3210. Sealed interface; 322. Measuring element; 33. Second adjusting element; 40. Sodium leakage detection component; 41. First sodium delivery pipeline; 42. Sodium storage simulation component; 43. First regulating component. Detailed Implementation

[0015] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0016] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0017] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning as understood by a person with ordinary skills in the field to which this application pertains.

[0018] In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In related technologies, sodium leakage detection methods used in sodium-cooled fast reactors include contact conductivity detection and smoke or temperature rise detection. The effectiveness of the detection mechanism is usually verified in a laboratory environment or in engineering experiments during large-flow leakage accidents. Verification under trace sodium leakage conditions is rare. Therefore, a method and device are needed to verify the detection results of trace sodium leakage in sodium-cooled fast reactor pipelines.

[0020] To address the aforementioned technical problems, embodiments of this application provide a simulation device suitable for trace sodium leakage. Figure 1 This is a schematic diagram of the structure of a simulation device for trace sodium leakage according to an embodiment of this application, as shown below. Figure 1 As shown, the simulation device includes a sodium filling and discharging assembly 10, a liquid sodium conveying assembly 20, a measuring assembly 30, a sodium leakage detection assembly 40, and a control unit.

[0021] In some embodiments, the sodium filling and discharging assembly 10 is configured to fill the liquid sodium delivery assembly 20 with liquid sodium; the liquid sodium delivery assembly 20 is configured to receive the liquid sodium filled by the sodium filling and discharging assembly 10 and then deliver the liquid sodium to the measuring assembly 30; the measuring assembly 30 is configured to receive the liquid sodium delivered by the liquid sodium delivery assembly 20 and weigh the received liquid sodium in real time during the receiving process; the control unit is configured to determine the leakage rate of liquid sodium at the current flow rate based on the weight of the liquid sodium obtained by the measuring assembly 30 and the time it takes for the liquid sodium delivery assembly 20 to deliver liquid sodium to the measuring assembly 30; the control unit is also configured to control the liquid sodium delivery assembly 20 to deliver liquid sodium to the sodium leakage detection assembly 40 at the current flow rate; the sodium leakage detection assembly 40 is configured to output a prompt message when a liquid sodium leakage is detected.

[0022] The simulation device provided in the embodiments of this application first uses the sodium filling and discharging component 10 to fill the liquid sodium delivery component 20 with liquid sodium, and then delivers the liquid sodium to the measuring component 30. Based on the weight of the liquid sodium received by the measuring component 30 and the delivery time, the sodium leakage rate at the current flow rate can be determined. This allows it to determine whether the current sodium leakage rate meets the criteria for a trace sodium leakage. Then, the liquid sodium delivery component 20 is controlled to deliver liquid sodium to the sodium leakage detection component 40 at the current flow rate, which can simulate the actual trace sodium leakage condition. When the sodium leakage detection component 40 detects a liquid sodium leakage, it outputs a prompt message, which is beneficial for verifying the detection effect of the sodium leakage detection device. At the same time, the sodium leakage rate can be controlled and adjusted, making it suitable for the design and verification of the sodium leakage detection component 40 under different operating conditions.

[0023] In some embodiments of this application, the sodium leakage rate of trace sodium leakage may be less than or equal to 100 g / h.

[0024] In some embodiments, such as Figure 1 As shown, the sodium filling and discharging assembly 10 may include a sodium filling and discharging container 11, a gas storage container 12, a fifth sodium delivery pipeline 14, and a third regulating member 15. The gas storage container 12 is connected to the sodium filling and discharging container 11 via the fifth sodium delivery pipeline 14. The third regulating member 15 is disposed on the fifth sodium delivery pipeline 14 and is used to control the connection and disconnection between the gas storage container 12 and the sodium filling and discharging container 11. The gas storage container 12 is configured to, when connected to the sodium filling and discharging container 11, use gas pressure to force liquid sodium in the sodium filling and discharging container 11 into the liquid sodium delivery assembly 20.

[0025] In some embodiments, the gas storage container 12 stores an inert gas to prevent the liquid sodium from reacting with the air.

[0026] In some embodiments, such as Figure 1 The sodium filling and discharging assembly 10 may further include a vacuum pump 13 for evacuating the sodium filling and discharging container 11, and a gas storage container 12 for replacing the gas in the sodium filling and discharging container 11 to purge the air in the sodium filling and discharging container 11 before injecting liquid sodium into it.

[0027] In some embodiments, the sodium leakage detection assembly 40 includes a first sodium delivery pipeline 41, a sodium storage simulation element 42, a sodium leakage detection element, and a first regulating element 43. The measurement assembly 30 includes a second sodium delivery pipeline 31, a sealing measuring element 32, and a second regulating element 33. The first sodium delivery pipeline 41 and the second sodium delivery pipeline 31 are respectively connected to the liquid sodium delivery assembly 20. The sodium storage simulation element 42 is connected to the first sodium delivery pipeline 41 and is used to simulate the components through which liquid sodium flows under actual working conditions. The sodium leakage detection element is disposed at the connection between the first sodium delivery pipeline 41 and the sodium storage simulation element 42 and is used to detect leaked liquid sodium. The sealing measuring element 32 is sealed to the second sodium delivery pipeline 31 and is used to weigh the received liquid sodium in real time during the process of receiving liquid sodium. The first regulating element 43 is disposed in the first sodium delivery pipeline 41 and is used to regulate the flow rate of liquid sodium in the first sodium delivery pipeline 41. The second regulating element 33 is disposed in the second sodium delivery pipeline 31 and is used to regulate the flow rate of liquid sodium in the second sodium delivery pipeline 31.

[0028] The simulation device provided in the embodiments of this application configures the sodium leakage detection component 40 to include a first sodium delivery pipeline 41, a sodium storage simulation component 42, and a first adjustment component 43. The sodium storage simulation component 42 can simulate the components through which liquid sodium flows under actual working conditions, thereby ensuring the reliability of the simulation device. The measurement component 30 is configured to include a second sodium delivery pipeline 31, a sealing measurement component 32, and a second adjustment component 33. The flow rate of liquid sodium in the first sodium delivery pipeline 41 and the second sodium delivery pipeline 31 can be flexibly adjusted through the first adjustment component 43 and the second adjustment component 33 so that the flow rate of liquid sodium conforms to the characteristics of trace sodium leakage.

[0029] In some embodiments, the sodium storage simulator 42 may be, for example, a component of a pipeline that simulates the delivery of liquid sodium within a reactor.

[0030] In some embodiments, the sodium leak detection device can output an alarm message after detecting a sodium leak, and after receiving the alarm message, it can record the sodium leak rate and the response time of the sodium leak detection device.

[0031] In some embodiments, a first sodium delivery pipe 41 can be inserted into one side of a sodium storage simulation component 42 and extend out from the other side, with the end face of the first sodium delivery pipe 41 flush with the outer surface of the sodium storage simulation component 42, thus simulating an actual pipeline sodium leakage environment.

[0032] In some embodiments, the bottom of the sealing measuring element 32 may have an air inlet connected to the gas storage container 12 to replace the gas inside the sealing measuring element 32. In such embodiments, the top of the sealing measuring element 32 may have an exhaust port to discharge the gas inside the sealing measuring element 32.

[0033] In some embodiments, the sealing measuring element 32 includes a sealing container 321 and a measuring element 322. The sealing container 321 has a sealing interface 3210. The second sodium delivery pipeline 31 enters the interior of the sealing container 321 through the sealing interface 3210 and is sealed to the sealing container 321. The measuring element 322 is disposed inside the sealing container 321 and is positioned below the second sodium delivery pipeline 31 when the second sodium delivery pipeline 31 enters the interior of the sealing container 321.

[0034] The simulation device provided in the embodiments of this application seals the second sodium delivery pipeline 31 to the sealed container 321, and then places the measuring element 322 below the second sodium delivery pipeline 31. In this way, when liquid sodium flows out of the second sodium delivery pipeline 31, the measuring element 322 can be used to receive and weigh the liquid sodium in a timely manner, thereby achieving the purpose of determining the sodium leakage rate.

[0035] In some embodiments, the gas storage container 12 is further configured to communicate with the sodium delivery container 23 and the sealing container 321 respectively, so as to fill the sodium delivery container 23 and the sealing container 321 with inert gas.

[0036] In some embodiments, the first regulating member 43 and the second regulating member 33 are valves, and the control member is configured to control the opening degree of the second regulating member 33 until the opening degree of the second regulating member 33 is the same as the opening degree of the first regulating member 43, so that the liquid sodium delivery assembly 20 delivers liquid sodium to the sodium leakage detection assembly 40 at the current flow rate.

[0037] The simulation device provided in the embodiments of this application controls the opening of the second adjusting member 33 until the opening of the second adjusting member 33 is the same as the opening of the first adjusting member 43, so as to ensure that when the liquid sodium is delivered to the sodium leakage detection component 40 at a predetermined liquid sodium flow rate, the sodium leakage rate meets the requirements of trace sodium leakage.

[0038] In some embodiments, the first sodium delivery pipeline 41 and the second sodium delivery pipeline 31 are symmetrically arranged to ensure that when liquid sodium is delivered to the sodium leakage detection component 40 at a predetermined flow rate of liquid sodium, the sodium leakage rate is consistent with the sodium leakage rate measured and determined by the measuring component 30, thereby ensuring the reliability of the simulation device.

[0039] In some embodiments, the liquid sodium delivery assembly 20 includes a third sodium delivery line 21, a fourth sodium delivery line 22, and a sodium delivery container 23. Figure 2 This is a schematic diagram of the structure of the sodium delivery container 23 according to an embodiment of this application, as shown below. Figure 1 and Figure 2As shown, a sodium filling port 231 is formed at the upper part of the sodium delivery container 23, and a sodium discharge port 232 is formed at the bottom of the sodium delivery container 23; the sodium filling port 231 is connected to the sodium filling and discharging assembly 10 via the third sodium delivery pipeline 21; the sodium discharge port 232 is connected to the sodium filling and discharging assembly 10 via the fourth sodium delivery pipeline 22.

[0040] The simulation device provided in the embodiments of this application can automatically inject liquid sodium into the sodium delivery container 23 and automatically discharge the liquid sodium from the sodium delivery container 23.

[0041] In some embodiments, the liquid sodium delivery assembly 20 may further include a weighing element disposed at the bottom of the sodium delivery container 23, the weighing element being used to measure the weight of the liquid sodium being filled into the liquid sodium delivery assembly 20.

[0042] In some embodiments, the control unit is further configured to: after the micro-sodium leakage process simulation is completed, control the liquid sodium in the liquid sodium delivery assembly 20, the measurement assembly 30 and the sodium leakage detection assembly 40 to flow into the sodium filling and discharging assembly 10, so as to realize the recovery of liquid sodium.

[0043] Embodiments of this application also provide a simulation method suitable for trace sodium leakage. Figure 3 This is a schematic flowchart of a simulation method for trace sodium leakage according to an embodiment of this application, as shown below. Figure 3 As shown, the simulation method may include at least the following steps S1 to S7.

[0044] S1. Under a protective atmosphere, liquid sodium is introduced into the liquid sodium delivery assembly 20.

[0045] S2. The liquid sodium in the liquid sodium delivery assembly 20 is delivered to the measuring assembly 30.

[0046] S3. Receive liquid sodium from liquid sodium conveying component 20 using measuring component 30, and weigh the received liquid sodium in real time during the receiving process.

[0047] S4. Based on the weight of the liquid sodium obtained by the measuring component 30 and the time it takes for the liquid sodium conveying component 20 to convey the liquid sodium into the measuring component 30, determine the leakage rate of the liquid sodium at the current flow rate.

[0048] S5. When the leakage rate at the current flow rate is less than or equal to the predetermined leakage rate, the current leakage rate of liquid sodium is determined to be consistent with trace sodium leakage.

[0049] S6. Control the liquid sodium delivery assembly 20 to deliver liquid sodium to the sodium leakage detection assembly 40 at the current flow rate.

[0050] S7. When the sodium leakage detection component 40 detects a liquid sodium leak, it outputs a prompt message.

[0051] The simulation method provided in the embodiments of this application first fills the liquid sodium delivery component 20 with liquid sodium, and then delivers the liquid sodium to the measuring component 30. Based on the weight of the liquid sodium received by the measuring component 30 and the delivery time, the sodium leakage rate at the current flow rate can be determined. This allows it to determine whether the current sodium leakage rate meets the criteria for a trace sodium leakage. Then, the liquid sodium delivery component 20 is controlled to deliver liquid sodium to the sodium leakage detection component 40 at the current flow rate, which can simulate the actual trace sodium leakage condition. When the sodium leakage detection component 40 detects a liquid sodium leakage, it outputs a prompt message, which is beneficial for verifying the detection effect of the sodium leakage detection device. At the same time, the sodium leakage rate can be controlled and adjusted, making it suitable for the design and verification of the sodium leakage detection component 40 under different operating conditions.

[0052] In some embodiments, the predetermined leakage rate may be less than or equal to 100 g / h.

[0053] In some embodiments, step S6 further includes the step of: configuring the first sodium supply line 41 of the sodium leakage detection component 40 to be symmetrically distributed with the second sodium supply line 31 of the measurement component 30.

[0054] The simulation method provided in the embodiments of this application can ensure that when liquid sodium is delivered to the sodium leakage detection component 40 at a predetermined flow rate, the sodium leakage rate is consistent with the sodium leakage rate measured and determined by the measurement component 30, thereby ensuring the reliability of the simulation method.

[0055] In some embodiments, the simulation method further includes the following steps: after the simulation of the trace sodium leakage process is completed, the liquid sodium in the liquid sodium delivery component 20, the measurement component 30 and the sodium leakage detection component 40 is controlled to flow into the sodium filling and discharging component 10 to achieve the recovery of liquid sodium.

[0056] The following detailed embodiments illustrate the process of simulating trace sodium leakage using the simulation device of this application.

[0057] Example First, the sodium filling and discharging container 11 is evacuated and replaced with argon gas using the gas storage container 12 and the vacuum pump 13, and this process is repeated three times. Then, liquid sodium is injected into the sodium filling and discharging container 11, and the liquid sodium in the sodium filling and discharging container 11 is transported to the sodium delivery container 23 through the sodium filling port 231 using the gas storage container 12.

[0058] Next, argon gas is slowly injected into the sealed container 321 using the gas storage container 12 to expel the air inside the sealed container 321. The process is stopped when the oxygen content inside the sealed container 321 is less than 0.5%. Then, the liquid sodium in the sodium delivery container 23 is delivered to the sealed container 321 through the second sodium delivery pipeline 31.

[0059] Then, the opening of the second regulating element 33 is controlled to change the flow rate of liquid sodium in the second sodium delivery pipeline 31, and the weight of liquid sodium is measured in real time using the measuring element 322 in the sealed container 321, thereby determining whether the sodium leakage rate at the current flow rate meets the requirements for trace sodium leakage.

[0060] Then, when the sodium leakage rate at the current flow rate meets the requirement of trace sodium leakage, the opening degree of the first regulating member 43 is set to be consistent with the opening degree of the second regulating member 33 and the second regulating member 33 is closed, so that the liquid sodium in the sodium delivery container 23 is delivered to the sodium storage simulation member 42. When liquid sodium leakage is detected, an alert message is output and the sodium leakage rate and response time are recorded.

[0061] Finally, after the simulation is completed, the liquid sodium in the sodium delivery container 23 and the sodium storage simulation component 42 is transported to the sodium filling and discharging container 11 using the pressure stored in the gas storage container 12.

[0062] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A device for simulating trace sodium leakage, characterized in that, It includes: sodium The system includes filling and discharging components, liquid sodium delivery components, measuring components, sodium leak detection components, and control components. The sodium filling and discharging assembly is configured to fill the liquid sodium delivery assembly with liquid sodium; The liquid sodium delivery assembly is configured to receive the liquid sodium supplied by the sodium filling and discharging assembly, and then deliver the liquid sodium to the measuring assembly; The measuring component is configured to receive the liquid sodium delivered by the liquid sodium delivery component, and to weigh the received liquid sodium in real time during the process of receiving the liquid sodium; The sodium leakage detection assembly includes a first sodium delivery pipeline, a sodium storage simulation component, a sodium leakage detection component, and a first regulating component. The measuring assembly includes a second sodium delivery pipeline, a sealed measuring element, and a second adjusting element; The first sodium delivery pipeline and the second sodium delivery pipeline are respectively connected to the liquid sodium delivery assembly. The sodium storage simulation component is connected to the first sodium delivery pipeline and is used to simulate the flow of liquid sodium under actual working conditions. The sodium leakage detection device is installed at the connection between the first sodium delivery pipeline and the sodium storage simulation device, and is used to detect leaked liquid sodium; The sealing measuring element is sealed to the second sodium delivery pipeline and is used to weigh the received liquid sodium in real time during the process of receiving the liquid sodium. The control unit is configured to determine the leakage rate of the liquid sodium at the current flow rate based on the weight of the liquid sodium obtained by the measuring component and the time taken for the liquid sodium delivery component to deliver the liquid sodium into the measuring component. The control component is further configured to, when the leakage rate is less than or equal to a predetermined leakage rate, control the liquid sodium delivery component to deliver the liquid sodium to the sodium leakage detection component at the current flow rate, so that the leakage rate of the liquid sodium delivered to the sodium leakage detection component is consistent with the determined leakage rate, thereby simulating the actual micro-sodium leakage condition. The sodium leakage detection component is configured to output a prompt message when it detects a liquid sodium leakage.

2. The simulation device according to claim 1, characterized in that, The first regulating element is disposed in the first sodium delivery pipeline and is used to regulate the flow rate of the liquid sodium in the first sodium delivery pipeline; The second regulating element is disposed in the second sodium delivery pipeline and is used to regulate the flow rate of the liquid sodium in the second sodium delivery pipeline.

3. The simulation device according to claim 2, characterized in that, The sealing measuring element includes a sealed container and a measuring element. The sealed container has a sealed interface, and the second sodium delivery pipeline enters the interior of the sealed container through the sealed interface and is sealed to the sealed container. The measuring element is disposed inside the sealed container and is positioned below the second sodium delivery pipeline when the second sodium delivery pipeline enters the sealed container.

4. The simulation device according to claim 2, characterized in that, The first adjusting element and the second adjusting element are valves, The control element is configured to control the opening degree of the second regulating element until the opening degree of the second regulating element is the same as the opening degree of the first regulating element, so that the liquid sodium delivery assembly delivers the liquid sodium to the sodium leakage detection assembly at the current flow rate.

5. The simulation device according to claim 4, characterized in that, The first sodium delivery pipeline and the second sodium delivery pipeline are arranged symmetrically.

6. The simulation device according to claim 1, characterized in that, The liquid sodium delivery assembly includes a third sodium delivery pipeline, a fourth sodium delivery pipeline, and a sodium delivery container, wherein... The sodium delivery container has a sodium filling port at the top and a sodium discharge port at the bottom. The sodium filling port is connected to the sodium filling and discharging assembly via the third sodium delivery pipeline; The sodium discharge port is connected to the sodium filling and discharging assembly via the fourth sodium delivery pipeline.

7. The simulation apparatus according to any one of claims 1-6, characterized in that, The control component is further configured to: after the simulation of the trace sodium leakage process is completed, control the liquid sodium in the liquid sodium delivery component, the measurement component, and the sodium leakage detection component to flow into the sodium filling and discharging component.

8. A simulation method suitable for trace sodium leakage, characterized in that, The simulation method includes the following steps: S1. Under a protective atmosphere, liquid sodium is introduced into the liquid sodium delivery assembly; S2. The liquid sodium in the liquid sodium delivery assembly is delivered to the measurement assembly, which is used to measure the amount of liquid sodium leakage during the liquid sodium flow process under simulated actual working conditions. S3. Receive the liquid sodium delivered by the liquid sodium delivery component using the measuring component, and weigh the received liquid sodium in real time during the receiving process. S4. Based on the weight of the liquid sodium obtained by the measuring component and the time it takes for the liquid sodium delivery component to deliver the liquid sodium into the measuring component, determine the leakage rate of the liquid sodium at the current flow rate; S5. When the leakage rate at the current flow rate is less than or equal to the predetermined leakage rate, it is determined that the current leakage rate of liquid sodium meets the criteria for trace sodium leakage. S6. Control the liquid sodium delivery component to deliver the liquid sodium to the sodium leakage detection component at the current flow rate, so that the leakage rate of the liquid sodium delivered to the sodium leakage detection component is consistent with the determined leakage rate, simulating the actual micro-sodium leakage condition. S7. When the sodium leakage detection component detects the liquid sodium leakage, it outputs a prompt message.

9. The simulation method according to claim 8, characterized in that, Step S6 also includes the following steps: The first sodium supply line of the sodium leakage detection component is configured to be symmetrically distributed with the second sodium supply line of the measurement component.

10. The simulation method according to claim 8 or 9, characterized in that, The simulation method further includes the following steps: After the simulation of the trace sodium leakage process is completed, the liquid sodium in the liquid sodium delivery component, the measurement component, and the sodium leakage detection component is controlled to flow into the sodium filling and discharging component.

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