Simulation test system and simulation test method

Abstract

The present disclosure provides a simulation test system and a simulation test method thereof. The system is used for simulating the residue of sodium after the sodium is discharged from a steam generator. The simulation test system comprises: a sodium supply device configured to provide liquid sodium; at least one simulation reaction unit, each simulation reaction unit comprising: a containing device formed with a containing cavity, the sodium supply device and the containing cavity forming a sodium circulation loop; at least one simulation piece arranged in the containing cavity to be scoured by the liquid sodium, the simulation piece being made of the same material as at least one original piece in the steam generator; and a heating device configured to heat the containing device during the sodium circulation to simulate the working state of the steam generator; a sodium purging device configured to provide inert gas to the sodium supply device and the containing cavity after the sodium circulation loop completes the sodium circulation to discharge the liquid sodium in the containing device; and a detection device configured to detect the residue of sodium on the simulation piece after the liquid sodium in the containing device is discharged.

Description

Technical Field

[0001] This disclosure relates to the field of reactor simulation experimental technology, and in particular to a simulation test system and simulation test method for simulating sodium residue after sodium is discharged from a steam generator. Background Technology

[0002] The steam generator is a key piece of equipment in a sodium-cooled fast reactor. Before any maintenance, replacement, or decommissioning operations can be performed on the steam generator, the sodium side must be drained and cleaned.

[0003] However, after sodium removal and purging operations are performed on the steam generator, a small amount of liquid sodium remains adsorbed inside the generator and flows at a low speed in the form of a thin film. This means that residual sodium exists in the form of a thin film. Furthermore, the flow pattern of the residual sodium inside the steam generator is quite complex, making it difficult to perform precise cleaning operations. This poses certain safety hazards for subsequent maintenance, replacement, or decommissioning of the steam generator. Summary of the Invention

[0004] To at least partially overcome the technical defects of at least one or more of the inventions mentioned above, at least one embodiment of this disclosure provides a simulation test system that can simulate the residual sodium after the steam generator discharges sodium, thereby enabling more accurate cleaning operations on the steam generator and improving the safety of maintenance, replacement, or decommissioning of the steam generator.

[0005] In view of this, embodiments of the present disclosure provide a simulation test system for simulating sodium residue after sodium is discharged from a steam generator. The simulation test system includes: a sodium supply device configured to supply liquid sodium; at least one simulation reaction unit, each simulation reaction unit including: a containment device forming a containment cavity, the sodium supply device and the containment cavity forming a sodium circulation loop; at least one simulation element disposed within the containment cavity to be scoured by the liquid sodium, the simulation element being made of the same material as at least one component in the steam generator; a heating device configured to heat the containment device during sodium circulation to simulate the operating state of the steam generator; a sodium purging device configured to supply inert gas to the sodium supply device and the containment cavity after the sodium circulation loop has completed sodium circulation to discharge the liquid sodium in the containment device; and a detection device configured to detect residual sodium on the simulation element after the liquid sodium in the containment device has been discharged.

[0006] Another aspect of this disclosure provides a simulation test method applicable to the above-described simulation test system, comprising: supplying liquid sodium to at least one containment device in a reaction unit using a sodium supply device, and heating the containment device using a heating device, so as to circulate and flush a simulation element inside the containment device with liquid sodium while heated; after circulating and flushing the simulation element for a period of time, purging the sodium supply device and the containment device using a sodium purging device to discharge the liquid sodium from the containment device; and after the liquid sodium in the containment device is discharged, detecting residual sodium on the simulation element using a detection device.

[0007] According to embodiments of this disclosure, by providing a sodium supply device, a sodium circulation loop can be formed with the receiving cavity to simulate the flow of hydraulic sodium in a steam generator. By providing a simulated component made of the same material as at least one component in the steam generator, the residual sodium on the simulated component can reflect the residual sodium in the corresponding component. By providing a heating device, the temperature environment of the steam generator under operating conditions can be simulated. By providing a sodium purging device, the sodium discharge and purging process of the steam generator can be simulated. By providing a detection device, residual sodium on the simulated component can be detected, thereby simulating the detection of residual sodium in the steam generator. This facilitates understanding the distribution pattern of residual sodium after sodium discharge from the steam generator, enabling more precise cleaning operations for residual sodium in the steam generator and improving the safety of maintenance, replacement, or decommissioning operations of the steam generator. Attached Figure Description

[0008] Figure 1 A schematic diagram illustrating the working principle of the simulation test system provided according to an embodiment of the present disclosure is shown;

[0009] Figure 2 A cross-sectional view of a simulated reaction unit provided according to an embodiment of the present disclosure is shown;

[0010] Figure 3 It shows Figure 2 A cross-sectional view of the simulated reaction unit in the embodiment shown;

[0011] Figure 4 A cross-sectional view of a simulated reaction unit provided according to another embodiment of the present disclosure is shown; and

[0012] Figure 5 It shows Figure 4 A cross-sectional view of the simulated reaction unit in the embodiment shown.

[0013] The meanings of the reference numerals in the above figures are as follows:

[0014] 1. Sodium supply device;

[0015] 11. Sodium buffer tank;

[0016] 12. Pump;

[0017] 13. First flow meter;

[0018] 14. Second flow meter;

[0019] 2. Simulated reaction unit;

[0020] 21. Containing device;

[0021] 22. Simulation component;

[0022] 23. Heating device;

[0023] 24. Connector;

[0024] 3. Sodium purging device;

[0025] 4. Sodium storage tank;

[0026] 5. Vacuum pump. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0028] However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of embodiments of this disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this disclosure.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The term "comprising" as used herein indicates the presence of features, steps, or operations, but does not exclude the presence or addition of one or more other features.

[0030] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). Similarly, when using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0031] After sodium removal and purging operations in a steam generator, a small amount of liquid sodium remains adsorbed inside, flowing at low speed in the form of a thin film. This residual sodium exists as a thin film. Furthermore, the flow pattern of this residual sodium inside the steam generator is complex, making precise cleaning difficult and posing safety hazards during subsequent maintenance, replacement, or decommissioning operations. A simulation system can be provided to understand the distribution pattern of residual sodium after sodium removal from the steam generator, enabling more precise cleaning and improving the safety of maintenance, replacement, or decommissioning operations.

[0032] Figure 1 A schematic diagram illustrating the working principle of a simulation test system provided according to an embodiment of this disclosure is shown. Figure 2 A cross-sectional view of a simulated reaction unit provided according to an embodiment of the present disclosure is shown. Figure 3 It shows Figure 2 A cross-sectional view of the simulated reaction unit in the embodiment shown.

[0033] like Figures 1 to 3 As shown, this disclosure provides a simulation test system. The simulation test system can be used to simulate sodium residue after sodium is discharged from a steam generator. The simulation test system may include a sodium supply device 1, at least one simulated reaction unit 2, a sodium purging device 3, and a detection device.

[0034] The sodium supply device 1 can be used to supply liquid sodium. Multiple simulated reaction units 2 can be provided, each of which can be connected to the sodium supply device 1. These simulated reaction units 2 can be connected in parallel to form a group of simulated reaction units 2, or they can be connected in series. Valves can be installed on both sides of each simulated reaction unit 2 group to control the inflow and outflow of liquid sodium within that group. Alternatively, valves can be installed on both sides of each simulated reaction unit 2 to individually control the inflow and outflow of liquid sodium within each unit.

[0035] Each simulated reaction unit 2 may include a containment device 21, at least one simulated component 22, and a heating device 23. The containment device 21 may have a containment cavity. A sodium supply device 1 may form a sodium circulation loop with the containment cavity. The sodium supply device 1 may form multiple sodium circulation loops with multiple containment cavities in the group of simulated reaction units 2. The simulated component 22 may be disposed within the containment cavity to be flushed by liquid sodium, thereby leaving residual sodium on the simulated component 22 after flushing. The simulated component 22 is made of the same material as at least one component in the steam generator to simulate sodium residue on a corresponding component in a real reaction steam generator. The heating device 23 may be used to heat the containment device 21 during sodium circulation to simulate the operating state of the steam generator. Furthermore, each simulated reaction unit 2 may also be provided with a temperature sensor for detecting the heating temperature of the heating device 23.

[0036] Furthermore, to simulate the residual sodium after the steam generator discharges sodium under different operating conditions, multiple simulated reaction units 2 can be set up in a closed inert atmosphere environment to facilitate the disassembly and transfer of the simulated component 22 and prevent the simulated component 22 from being contaminated by surrounding substances or gases. Temperature monitoring points can be set on the simulated component 22. The simulation test system can also be equipped with control and monitoring devices to monitor and control various relevant parameters in the simulation test system.

[0037] Specifically, the multiple components through which sodium flows during the actual sodium removal process of a steam generator can be simulated separately. For example, the heat exchange tubes, support plates, and shell side of the steam generator can be simulated separately. The simulation component 22 can be an object made of the same material as at least one component in the steam generator to be simulated. For example, the simulation component 22 can be a plate made of the same material as the shell side of the steam generator to be simulated, so as to simulate the residual sodium on the shell side of the steam generator to be simulated. Further, the simulation component 22 can be an object made of the same material and with the same shape as the heat exchange tubes, support plates, and shell side of the steam generator to be simulated. The simulation component 22 can also be a heat exchange tube, support plate, and shell side of the same specifications used when manufacturing the steam generator to be simulated.

[0038] Furthermore, the receiving device 21 may include a housing, and an receiving space may be formed inside the housing. Detachable connectors 24 may be provided at both ends inside the housing. The simulation element 22 can be installed within the receiving space via the connectors 24. For example, the simulation element 22 may be installed, for example, by welding onto a connector 24 at one end of the receiving device 21 (e.g., Figure 2 On the lower connector, the other end of the connector (e.g.) Figure 2 A groove matching the shape of the simulation element 22 can be formed on the upper connector. First, the simulation element 22, which is mounted on the connector, is inserted into the receiving device 21 through the lower opening of the receiving device 21; then, the lower connector is installed on the lower end of the receiving device 21 (e.g., Figure 2 The lower end of the receiving device 21 is positioned such that the upper end of the simulation element 22 extends partially from the upper opening of the receiving device 21; then, another connector (the upper connector) is fitted onto the upper end of the simulation element 22, such that the groove mates with the simulation element 22; finally, another connector is installed on the upper end of the receiving device 21 (e.g., the lower end of the receiving device 21). Figure 2 (the upper end of the middle receiving device 21), thus forming as Figure 2 and Figure 3 The simulated reaction unit 2 is shown. A heating device 23 can be wrapped around the outer periphery of the housing. The heating device 23 can be a heating element such as a resistance wire. In another alternative embodiment, the heating device 23 can be embedded inside the housing. Figure 2 and Figure 3 In the simulation reaction unit 2 of the embodiment shown, the simulation element 22 may include a long strip-shaped simulation element.

[0039] The sodium purging device 3 can be used to supply inert gas to the sodium supply device 1 and the receiving cavity after the sodium circulation loop has completed, in order to purge the liquid sodium in the receiving device 21. The detection device can be used to detect residual sodium on the simulation element 22 after the liquid sodium in the receiving device 21 has been purged. The inert gas can be a gas that does not react with liquid sodium, such as argon. The inert gas can enter the sodium supply device 1 and the receiving cavity through a pipe communicating with them, and purge the gas in the sodium supply device 1 and the receiving cavity.

[0040] According to embodiments of this disclosure, by providing a sodium supply device 1, a sodium circulation loop can be formed with the receiving cavity to simulate the flow of hydraulic sodium in the steam generator. By providing a simulation element 22 made of the same material as at least one component in the steam generator, the residual sodium on the simulation element 22 can reflect the residual sodium in the corresponding component. By providing a heating device 23, the temperature environment of the steam generator under operating conditions can be simulated. By providing a sodium purging device 3, the sodium discharge and purging process of the steam generator can be simulated. By providing a detection device, residual sodium on the simulation element 22 can be detected, thereby simulating the detection of residual sodium in the steam generator. This facilitates understanding the distribution pattern of residual sodium after the steam generator discharges sodium, enabling more precise cleaning operations of residual sodium in the steam generator and improving the safety of maintenance, replacement, or decommissioning operations of the steam generator.

[0041] According to the embodiments of this disclosure, the simulation test system can be used to conduct simulation test studies on the distribution law of residual sodium on the surface of various sodium-related equipment materials in sodium-cooled fast reactors and the distribution of sodium film thickness under test scale, so as to understand the law of residual sodium on the surface of various sodium-related equipment materials and the key influencing factors of sodium film thickness, and thus provide experimental verification data for numerical simulation calculation of the distribution law of residual sodium on the material surface.

[0042] In some embodiments, the simulation test system may further include a sodium storage tank 4. The sodium storage tank 4 may be filled with liquid sodium. The sodium storage tank 4 may be connected to a sodium purging device 3 and a sodium supply device 1, respectively. The sodium purging device 3 may be used to supply inert gas to the sodium storage tank 4. The liquid sodium in the sodium storage tank 4 flows to the sodium supply device 1 under the influence of the inert gas. Before conducting the simulation experiment, the sodium purging device 3 can be used to transfer the liquid sodium in the sodium storage tank 4 to the sodium supply device 1. A valve may be installed between the sodium supply device 1 and the sodium storage tank 4. After the liquid sodium in the sodium supply device 1 meets the simulated liquid sodium requirements, the valve can be used to prevent further liquid sodium from entering the sodium supply device 1 from the sodium storage tank 4.

[0043] A valve can be installed between the outlet of the simulated reaction unit 2 and the inlet of the sodium supply device 1 to prevent liquid sodium from flowing back into the simulated reaction unit 2 after sodium circulation is completed. After sodium circulation is completed, an inert gas can be supplied to the sodium supply device 1 using a sodium purging device 3. The inert gas can force the liquid sodium in the sodium supply device 1 into the simulated reaction unit 2. A pipeline can also be installed between the simulated reaction unit 2 and the sodium storage tank 4. When sodium is discharged using the sodium purging device 3, the liquid sodium in the sodium supply device 1 and the simulated reaction unit 2 flows back into the sodium storage tank 4.

[0044] In some embodiments, the sodium supply device 1 may further include a sodium buffer tank 11 and a pump 12. The inlet of the sodium buffer tank 11 can be connected to the sodium storage tank 4 and the outlet of the reaction unit, respectively. One end of the pump 12 is connected to the outlet of the sodium buffer tank 11, and the other end of the pump 12 is connected to the inlet of the reaction unit. The pump 12 can provide power for the sodium circulation loop. The pump 12 can be used to transport liquid sodium from the sodium buffer tank 11 to the reaction unit and to allow the liquid sodium to flow back to the sodium buffer tank 11 from the outlet of the reaction unit. The pump 12 can be a sodium electromagnetic pump 12. The sodium buffer tank 11 can be used to provide liquid sodium that meets the test temperature and pressure requirements for the entire simulation test system. An inert gas can be used as a protective gas for the sodium buffer tank 11. Using the sodium electromagnetic pump 12, different liquid sodium flow rates can be provided to the simulation test system, thereby meeting the needs of various simulation conditions.

[0045] In some embodiments, the sodium supply device 1 may further include a first flow meter 13 and a second flow meter 14. The first flow meter 13 may be disposed between the other end of the pump 12 and the inlet of the reaction unit. The first flow meter 13 may be used to measure the flow rate of liquid sodium flowing into the reaction unit from the sodium buffer tank 11. The second flow meter 14 may be disposed between the outlet of the reaction unit and the inlet of the sodium buffer tank 11, and may be used to measure the flow rate of liquid sodium flowing back to the sodium buffer tank 11 from the reaction unit. By setting the first flow meter 13 and the second flow meter 14, the flow rate of sodium in the steam generator during operation can be simulated, and the speed of sodium in the steam generator during the sodium discharge process can also be simulated.

[0046] In some embodiments, the simulation test system may further include a vacuum pump 5. The vacuum pump 5 can be connected to the sodium supply device 1 and the sodium storage tank 4. Before conducting the simulation experiment, the vacuum pump 5 can be used to extract the gas from the sodium supply device 1 and the sodium storage tank 4. The vacuum pump 5 can cooperate with the sodium purging device 3 to replace the gas in the sodium supply device 1 and the sodium storage tank 4 with an inert gas, so that the water and oxygen concentrations in the sodium supply device 1 and the sodium storage tank 4 meet the requirements for liquid sodium, so that the required liquid sodium can be introduced into the sodium supply device 1 and the sodium storage tank 4.

[0047] In some embodiments, the sodium cycling duration is greater than or equal to 75 hours. Experiments have shown that, due to the protective film on the outer surface of the simulated component 22, the sodium adhesion effect is not significant when the cycling duration is less than 72 hours. When the cycling duration is greater than or equal to 72 hours, the protective film on the outer surface of the component can be completely consumed. When the cycling duration is greater than or equal to 75 hours, the sodium adhesion situation is basically stable; that is, when the cycling duration is greater than or equal to 75 hours, the residual sodium on the simulated component 22 is basically stable.

[0048] Figure 4 A cross-sectional view of a simulated reaction unit provided according to another embodiment of the present disclosure is shown. Figure 5 It shows Figure 4 A cross-sectional view of the simulated reaction unit in the embodiment shown.

[0049] like Figures 4 to 5 As shown, in some embodiments, the simulation component 22 may be in the form of a sheet material. For example, the simulation component 22 may be a sheet material of the same material as the shell side of the steam generator to simulate the shell side of the steam generator. Furthermore, the housing device 21 may be arranged vertically and / or horizontally in the reaction unit to simulate vertically and / or horizontally placed components in the steam generator.

[0050] In some embodiments, the detection device can be used to detect the weight and shape of sodium. The detection device may include a laser profilometer and a weighing instrument. The laser profilometer can be used to measure the shape of residual sodium. The weighing instrument can be used to measure the weight of the simulation component 22 before and after sodium circulation. By using a laser profilometer to measure the thickness of the sodium film formed after the liquid sodium flows along the flow direction of the liquid sodium on the surface of the simulation component 22, the distribution pattern of sodium adhesion on the surface of the simulation component 22 can be obtained.

[0051] The embodiments of this disclosure also provide a simulation test method to simulate sodium residue after sodium is discharged from a steam generator. The simulation test method in this embodiment can be implemented using the simulation test system described in any of the above embodiments. Specifically, the test method in this embodiment includes the following steps S610 to S630.

[0052] In step S610, liquid sodium is supplied to at least one containment device 21 in the reaction unit using sodium supply device 1, and containment device 21 is heated using heating device 23 so that, under heating conditions, the simulated element 22 inside containment device 21 is flushed by circulating liquid sodium.

[0053] In step S620, after the simulated component 22 has been circulated for a period of time, the sodium supply device 1 and the container 21 are purged using the sodium purging device 3 to discharge the liquid sodium from the container 21.

[0054] In step S630, after the liquid sodium in the containing device 21 is discharged, the residual sodium on the simulation component 22 is detected by a detection device.

[0055] Specifically, prior to step S610, the process may further include using a vacuum pump 5 to extract gas from the sodium supply device 1 and the sodium storage tank 4. The vacuum pump 5 can cooperate with the sodium purging device 3 to replace the gas in the sodium supply device 1 and the sodium storage tank 4 with an inert gas, so that the water and oxygen concentrations in the sodium supply device 1 and the sodium storage tank 4 meet the requirements for liquid sodium, so that liquid sodium meeting the requirements can be introduced into the sodium supply device 1 and the sodium storage tank 4.

[0056] Example 1 simulates the residual sodium after a steam generator discharges sodium at a temperature of 308°C.

[0057] In step S710, the atmosphere of the entire simulation test system is replaced by sodium purging device 3 and vacuum pump 5 to ensure the quality of sodium during sodium circulation. Inert gas is used to protect the simulation reaction unit 2 to ensure that no impurities such as air are introduced during the replacement of simulation component 22, and to avoid contamination of the sodium film on simulation component 22 during operations such as unpacking and weighing.

[0058] In step S720, the simulation component 22 is installed inside the simulation reaction unit 2, and the corresponding simulation reaction unit 2 is installed in an inert atmosphere. The heating device 23 is used to preheat the containing device 21 to 210°C, and sodium is added to the sodium buffer tank 11 using the sodium storage tank 4. After the required amount of sodium for the simulation test system is reached, the sodium feeding is stopped, and the electromagnetic pump 12 is turned on to start the sodium circulation process.

[0059] In step S730, the heating device 23 is controlled to heat the containing device 21 to 308°C, and the flow rate of the circulating liquid sodium is controlled within the required range by the electromagnetic pump 12.

[0060] In step S740, after the sodium circulation has been running at 308°C for 75 hours, the temperature of the container 21 is reduced to 210°C, and the electromagnetic pump 12 is turned off. The corresponding valves are adjusted to discharge the circulating liquid sodium in the container 21 into the sodium storage tank 4 based on the pressure in the sodium circulation loop. One hour after the sodium discharge, the remaining liquid sodium in the container 21 is discharged into the sodium storage tank 4 using the inert gas released by the sodium purging device 3.

[0061] Step S750: Allow the simulation test system to cool down naturally. After the simulation test system returns to room temperature, unseal the simulation part under the protection of argon atmosphere, weigh the obtained simulation part quantitatively, and use a laser profilometer to perform qualitative and quantitative analysis on the thickness and distribution of sodium film on the surface of the simulation part.

[0062] According to embodiments of this disclosure, different experimental temperatures in step S730 can be set according to different simulated working conditions, for example, 467°C.

[0063] The embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and have not been described in detail. Furthermore, the definitions of the various components described above are not limited to the specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0064] It should also be noted that, in the specific embodiments of this disclosure, unless otherwise stated otherwise, the numerical parameters in this specification and the appended claims are approximate values ​​and can be changed according to the desired characteristics obtained from the content of this disclosure. Specifically, all numbers used in the specification and claims to indicate dimensions, range conditions, etc., of the composition should be understood to be modified by the term "about" in all cases. Generally, this means that there may be variations of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments.

[0065] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0066] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of this disclosure. It should be understood that the above are only specific embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A simulation test system for simulating sodium residue after sodium is discharged from a steam generator, characterized in that, The simulation test system includes: The sodium supply device is configured to supply liquid sodium; At least one simulated reaction unit, each simulated reaction unit comprising: A receiving device having a receiving cavity, wherein the sodium supply device and the receiving cavity form a sodium circulation loop; At least one simulated element, disposed within the receiving cavity to be subjected to the scouring of the liquid sodium, the simulated element being made of the same material as at least one component in the steam generator; and A heating device is configured to heat the containment device during sodium circulation to simulate the operation of a steam generator. A sodium purging device is configured to supply inert gas to the sodium supply device and the containment cavity after the sodium circulation loop has completed sodium circulation, in order to purge liquid sodium from the containment device; and The detection device is configured to detect residual sodium on the simulation element after the liquid sodium in the containment device has been discharged; The detection device detects the weight and shape of the sodium; The detection device includes: A laser profilometer is configured to measure the shape of the residual sodium; and A weighing instrument is configured to measure the weight of the simulation element before and after sodium cycling.

2. The simulation test system according to claim 1, characterized in that, Also includes: A sodium storage tank is filled with liquid sodium. The sodium purging device supplies the inert gas to the sodium storage tank, causing the liquid sodium in the sodium storage tank to flow to the sodium supply device under the push of the inert gas.

3. The simulation test system according to claim 2, characterized in that, The sodium supply device includes: A sodium buffer tank, the inlet of which is connected to both the sodium storage tank and the outlet of the simulated reaction unit; and A pump is configured to deliver liquid sodium from the sodium buffer tank to the simulated reaction unit and to allow the liquid sodium to flow back to the sodium buffer tank from the outlet of the simulated reaction unit.

4. The simulation test system according to claim 3, characterized in that, The sodium supply device further includes: A first flow meter is configured to measure the flow rate of liquid sodium flowing from the sodium buffer tank into the simulated reaction unit; and A second flow meter is configured to measure the flow rate of liquid sodium flowing back from the simulated reaction unit to the sodium buffer tank.

5. The simulation test system according to claim 2, characterized in that, Also includes: A vacuum pump is configured to extract gas from the sodium supply device and the sodium storage tank.

6. The simulation test system according to claim 1, characterized in that, The sodium cycle duration is greater than or equal to 75 hours.

7. The simulation test system according to claim 1, characterized in that, When there is one simulated reaction unit, the containing device is arranged vertically or horizontally in the simulated reaction unit; When there are two or more simulated reaction units, the containing device is arranged vertically and / or horizontally in the simulated reaction unit.

8. A simulation test method applicable to the simulation test system according to any one of claims 1 to 7, characterized in that, include: Liquid sodium is supplied to at least one containment device in the simulated reaction unit using a sodium supply device, and the containment device is heated using a heating device so that, while heated, the simulated components inside the containment device are flushed with liquid sodium circulation. After the simulation component is circulated and flushed for a period of time, the sodium supply device and the container are purged using a sodium purging device to discharge the liquid sodium from the container. as well as After the liquid sodium in the containing device is discharged, the residual sodium on the simulation component is detected using a detection device.

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