Device and method for determining oxygen release rate coefficient of solid-phase oxygen source

Abstract

The embodiment of the invention relates to the field of analyzing materials by applying a thermal method, in particular to a device and a method for determining an oxygen release rate coefficient of a solid-phase oxygen source. According to the device, the lead-bismuth alloy is controlled to flow through the solid-phase oxygen source to obtain oxygen content data before and after oxygen mass exchange between the lead-bismuth alloy and the solid-phase oxygen source, so that the oxygen release rate coefficient of the solid-phase oxygen source is determined, data support is provided for oxygen content control in the lead-bismuth alloy, and design of lead-bismuth oxygen control components is facilitated. According to the method, the oxygen release rate coefficient of the solid-phase oxygen source is jointly determined by a plurality of parameters by determining the temperature, dissolved oxygen concentration and pressure changes before and after the lead-bismuth alloy flows through the solid-phase oxygen source and combining the time and flow rate of the lead-bismuth alloy flowing through the solid-phase oxygen source, so that the accuracy of the oxygen release rate coefficient of the solid-phase oxygen source is improved; and the oxygen control capability of the solid-phase oxygen source can be represented more accurately.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of applying thermal methods to analyze materials, and in particular, to a device and method for determining the oxygen release rate coefficient of a solid phase oxygen source. BACKGROUND

[0002] The statements herein are merely provided to give general background information on the present application, and do not necessarily constitute the prior art.

[0003] Liquid metal such as lead or lead bismuth is an excellent nuclear fuel coolant, but it has strong corrosiveness to the structural material of the reactor. The liquid lead or lead bismuth will have a dissolution reaction with the alloy components of the structural material of the reactor under the condition of oxygen deficiency, causing the pipes of the cooling system of the reactor and the equipment of the reactor to be consumed; and if the oxygen content is too high, the dissolved oxygen will react with some elements in the structural material of the reactor to generate solid oxides, and the deposition of the oxides in the coolant loop will cause the pipes of the reactor to be blocked. Therefore, it is necessary to accurately control the oxygen content in the liquid lead or lead bismuth, so as to stabilize the cooling system. SUMMARY

[0004] In the following, a brief overview of the present application is given, in order to provide a basic understanding of some aspects of the present application. It should be understood that this overview is not an extensive overview of the present application. It is not intended to identify key or important parts of the present application nor is it intended to limit the scope of the present application. Its purpose is merely to present some concepts in a simplified form as a prelude to the more detailed description of a later discussion.

[0005] The present application provides a device for determining the oxygen release rate coefficient of a solid phase oxygen source, which can represent the oxygen release amount of the lead bismuth alloy flowing through the solid phase oxygen source, comprising: a liquid storage member, which is configured to store the lead bismuth alloy; a first containing member, a second containing member and a solid phase oxygen source holding member, an oxygen measurement sensor, which is configured to determine the oxygen content of the lead bismuth alloy in the first containing member and the second containing member, respectively, the solid phase oxygen source holding member is configured to hold the solid phase oxygen source, the liquid storage member is configured to output the lead bismuth alloy to the first containing member, and then output to the second containing member through the solid phase oxygen source holding member, the second containing member is configured to be in fluid communication with the liquid storage member, and the first containing member is capable of determining the flow rate of the lead bismuth alloy through the solid phase oxygen source holding member.

[0006] Another aspect of the present application provides a method for determining the oxygen release rate coefficient of a solid oxygen source, which can represent the oxygen release amount of a lead-bismuth alloy flowing through the solid oxygen source, comprising the following steps: S10, determining the temperature, dissolved oxygen concentration and pressure of the lead-bismuth alloy in the first containing member without flowing through the solid oxygen source; S20, flowing the lead-bismuth alloy through the solid oxygen source; S30, determining the time and flow rate of the lead-bismuth alloy flowing through the solid oxygen source; S40, determining the temperature, dissolved oxygen concentration and pressure of the lead-bismuth alloy in the second containing member after flowing through the solid oxygen source; and S50, determining the oxygen release rate coefficient of the solid oxygen source according to the temperature, dissolved oxygen concentration and pressure determined in step S10, the time and flow rate determined in step S30, and the temperature, dissolved oxygen concentration and pressure determined in step S40.

[0007] Another aspect of the present application provides a method for determining the oxygen release rate coefficient of a solid oxygen source, which can represent the oxygen release amount of a lead-bismuth alloy flowing through the solid oxygen source, comprising the following steps: S10, determining the temperature, dissolved oxygen concentration and pressure of the lead-bismuth alloy in the first containing member without flowing through the solid oxygen source; S20, flowing the lead-bismuth alloy through the solid oxygen source; S30, determining the time and flow rate of the lead-bismuth alloy flowing through the solid oxygen source; S40, determining the temperature, dissolved oxygen concentration and pressure of the lead-bismuth alloy in the second containing member after flowing through the solid oxygen source; and S50, determining the oxygen release rate coefficient of the solid oxygen source according to the temperature, dissolved oxygen concentration and pressure determined in step S10, the time and flow rate determined in step S30, and the temperature, dissolved oxygen concentration and pressure determined in step S40.

[0008] The device for determining the oxygen release rate coefficient of a solid oxygen source provided by the embodiments of the present application can control the lead-bismuth alloy to flow through the solid oxygen source, so as to obtain the oxygen content data of the lead-bismuth alloy before and after the oxygen mass exchange with the solid oxygen source, and determine the oxygen release rate coefficient of the solid oxygen source, which can provide data support for the oxygen content control of the lead-bismuth alloy, and help to design the lead-bismuth oxygen control component.

[0009] The method for determining the oxygen release rate coefficient of a solid oxygen source provided by the embodiments of the present application can determine the changes of the temperature, dissolved oxygen concentration and pressure of the lead-bismuth alloy before and after flowing through the solid oxygen source, and combine the time and flow rate of flowing through the solid oxygen source, so that the oxygen release rate coefficient of the solid oxygen source is determined by multiple parameters, which can improve the accuracy of the oxygen release rate coefficient of the solid oxygen source, and help to more accurately represent the oxygen control ability of the solid oxygen source.

[0010] The method for determining the oxygen release rate coefficient of a solid oxygen source provided in the embodiments of this application, by employing the aforementioned apparatus for determining the oxygen release rate coefficient of a solid oxygen source, monitors the temperature, dissolved oxygen concentration, and pressure of the lead-bismuth alloy flowing through the solid oxygen source in the first and second containers. This allows the lead-bismuth alloy to be monitored in a stable state, improving the accuracy of the obtained data. Furthermore, by combining the time and flow rate of the lead-bismuth alloy flowing through the solid oxygen source, the accuracy of the oxygen release rate coefficient of the solid oxygen source determined thereby is improved. 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 the device structure for determining the oxygen release rate coefficient of a solid oxygen source, provided in an embodiment of this application.

[0013] Explanation of reference numerals in the attached figures: 1. Liquid storage device; 2. First container; 3. Second container; 4. Solid oxygen source holding device; 5. Oxygen sensor; 6. Pressure adjustment device; 7. Liquid path; 71. First liquid path; 710. First liquid path control device; 72. Second liquid path; 720. Second liquid path control device; 73. Third liquid path; 730. Third liquid path control device; 8. Liquid level monitoring device; 81. Low liquid level monitoring device; 82. High liquid level monitoring device; 9. Gas path; 91. First gas path control device; 92. Second gas path control device; 93. Third gas path control device; 94. Fourth gas path control device; 95. Fifth gas path control device; 100. Apparatus for determining the oxygen release rate coefficient of a solid oxygen source. Detailed Implementation

[0014] 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 meeting 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.

[0015] 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.

[0016] The following disclosure provides several different implementations or examples for carrying out this application. To simplify the disclosure of this application, specific examples of components and methods are described below. Of course, these are merely examples and are not intended to limit this application. In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0017] Currently, solid-phase oxygen control is commonly used to control the oxygen content in liquid lead or lead-bismuth. This method achieves oxygen concentration regulation through oxygen mass exchange between the solid and liquid phases. Accordingly, it is necessary to accurately characterize the kinetic process of releasing oxygen from the solid oxygen source into the liquid lead or lead-bismuth.

[0018] To address the aforementioned problems, embodiments of this application provide, in one aspect, an apparatus for determining the oxygen release rate coefficient of a solid oxygen source. The oxygen release rate coefficient characterizes the amount of oxygen released by the solid oxygen source from a lead-bismuth alloy flowing through it. Figure 1 This is a schematic diagram of the device structure for determining the oxygen release rate coefficient of a solid oxygen source according to an embodiment of this application, as shown below. Figure 1 As shown, the apparatus 100 for determining the oxygen release rate coefficient of a solid oxygen source includes: a liquid storage unit 1 configured to store a lead-bismuth alloy; a first container 2, a second container 3, and a solid oxygen source holding member 4; an oxygen sensor 5 configured to determine the oxygen content of the lead-bismuth alloy in the first container 2 and the second container 3, respectively; the solid oxygen source holding member 4 configured to hold the solid oxygen source; the liquid storage unit 1 configured to output the lead-bismuth alloy to the first container 2, and then to the second container 3 via the solid oxygen source holding member 4; the second container 3 configured to be in fluid communication with the liquid storage unit 1; and the first container 2 configured to determine the flow rate of the lead-bismuth alloy passing through the solid oxygen source holding member 4.

[0019] The apparatus 100 provided in the embodiments of this application for determining the oxygen release rate coefficient of a solid oxygen source obtains oxygen content data before and after the oxygen mass exchange between the lead-bismuth alloy and the solid oxygen source by controlling the flow of the lead-bismuth alloy through the solid oxygen source, thereby determining the oxygen release rate coefficient of the solid oxygen source, providing data support for the control of oxygen content in the lead-bismuth alloy, and helping to carry out the design of lead-bismuth oxygen control components.

[0020] In some embodiments, such as Figure 1As shown, the first container 2 is positioned higher than the solid oxygen source holder 4, and the solid oxygen source holder 4 is positioned higher than the second container 3. Using gravity, the lead-bismuth alloy can flow from the first container 2 through the solid oxygen source holder 4 to the second container 3. The flow rate of the lead-bismuth alloy through the solid oxygen source holder 4 is determined by the liquid level difference of the lead-bismuth alloy in the first container 2. Setting the flow path of the lead-bismuth alloy between the first container 2, the solid oxygen source holder 4, and the second container 3 according to gravity allows the lead-bismuth alloy to flow and fall under gravity, avoiding accumulation due to insufficient flow momentum and reducing the amount of lead-bismuth alloy residue in the first container 2, the solid oxygen source holder 4, and the second container 3. On the one hand, reducing lead-bismuth alloy residue makes the oxygen content data determined by the oxygen sensor 5 more accurate; on the other hand, eliminating the need for a drive component to provide flow momentum for the lead-bismuth alloy simplifies the device.

[0021] In some embodiments, both the first container 2 and the second container 3 are provided with an oxygen sensor 5, which is configured to measure the oxygen content of the lead-bismuth alloy in the first container 2 and the second container 3 respectively, so as to determine the change in oxygen content after the lead-bismuth alloy undergoes oxygen mass exchange.

[0022] In some embodiments, the liquid storage component 1 is positioned lower than the second container 3 so that the lead-bismuth alloy in the second container 3 can flow back into the liquid storage component 1 under the action of gravity, thereby realizing the recycling of the lead-bismuth alloy.

[0023] In some embodiments, a pressure regulating member 6 is also included. The pressure regulating member 6 is configured to be in gas communication with the liquid storage member 1, the first container 2, and the second container 3 to adjust the pressure in the liquid storage member 1, the first container 2, and the second container 3. The pressure change applied by the pressure regulating member 6 drives the lead-bismuth alloy to flow between the liquid storage member 1, the first container 2, and the second container 3, avoiding the need for additional driving components and simplifying the device.

[0024] In some embodiments, the pressure regulating member 6 is connected to the liquid storage member 1, the first container 2 and the second container 3 via the gas passage 9 to provide a stable and adjustable pressure supply to the device, and to keep any one of the liquid storage member 1, the first container 2, the second container 3, the solid oxygen source holder 4 and the pressure regulating member 6 in the device at a predetermined pressure, so as to better control the normal flow of the lead-bismuth alloy.

[0025] In some embodiments, a first gas path control element 91 is provided at the connection between the pressure regulating element 6 and the gas path 9, a second gas path control element 92 is provided at the connection between the liquid storage element 1 and the gas path 9, a third gas path control element 93 is provided at the connection between the second receiving element 3 and the gas path 9, and a fourth gas path control element 94 is provided at the connection between the first receiving element 2 and the gas path 9. By providing multiple gas path control elements at the gas path connections, the pressure in each container through which the lead-bismuth alloy flows can be precisely controlled, making the test results more accurate.

[0026] In some embodiments, the liquid storage device 1, the first containment device 2, the solid oxygen source retainer 4, and the second containment device 3 are fluidly connected through the liquid passage 7.

[0027] In some embodiments, a first liquid passage 71 is provided between the liquid storage component 1 and the first container 2, and a first liquid passage control component 710 is provided on the first liquid passage 71 to control the liquid storage component 1 to deliver lead-bismuth alloy to the first container 2.

[0028] In some embodiments, a second liquid passage 72 is provided between the first container 2 and the second container 3, and a solid oxygen source holder 4 is disposed on the second liquid passage 72. The lead-bismuth alloy flows through the solid oxygen source, undergoes oxygen mass exchange, and then flows into the second container 3. A second liquid passage control device 720 is also provided between the solid oxygen source holder 4 and the first container 2, so that the liquid level of the lead-bismuth alloy in the first container 2 is stable before it undergoes oxygen mass exchange with the solid oxygen source. This helps to uniformly adjust the oxygen content and temperature of the lead-bismuth alloy to obtain the initial reference state of the lead-bismuth alloy.

[0029] In some embodiments, a third liquid passage 73 is provided between the second container 3 and the liquid storage container 1, and a third liquid passage control device 730 is provided on the third liquid passage 73, so that the liquid level of the lead-bismuth alloy in the second container 3 is in a stable state after oxygen mass exchange, which helps to uniformly adjust the oxygen content and temperature of the lead-bismuth alloy to obtain the result state of the lead-bismuth alloy after oxygen mass exchange, making the determined oxygen content change of the lead-bismuth alloy more accurate; and, opening the third liquid passage control device 730 allows the lead-bismuth alloy in the second container 3 to flow into the liquid storage container 1 under gravity, realizing the recycling and use of the lead-bismuth alloy.

[0030] In some embodiments, the first container 2 and the second container 3 are configured to heat the contained lead-bismuth alloy and determine its temperature, thereby setting accurate initial and final reference states and ensuring that the measurement results are accurate, reliable and repeatable.

[0031] In some embodiments, such as Figure 1As shown, a liquid level monitoring element 8 is provided in the first receiving member 2. The liquid level monitoring element 8 may include a low liquid level monitoring element 81 and a high liquid level monitoring element 82. The low liquid level monitoring element 81 is configured such that the length of its extension in the first receiving member 2 is greater than the length of its extension in the first receiving member 2, so as to sense the liquid level at different heights and provide feedback on the changes in the liquid level of the lead-bismuth alloy.

[0032] In some embodiments, an electrical instrumentation system may be configured to record data such as time, liquid level, pressure, oxygen content, and temperature throughout the oxygen mass exchange test process.

[0033] In some embodiments, the solid oxygen source can be solid lead oxide. Through solid-liquid oxygen mass exchange between the liquid lead-bismuth alloy and the solid lead oxide, the release of dissolved oxygen from the solid oxygen source into the lead-bismuth alloy can be stably controlled. In addition, the iron-based structural material of the device 100 for determining the oxygen release rate coefficient of the solid oxygen source absorbs the dissolved oxygen in the lead-bismuth alloy, thereby forming a dynamic equilibrium and achieving the goal of controlling the dissolved oxygen content in the lead-bismuth alloy.

[0034] Another embodiment of this application provides a method for determining the oxygen release rate coefficient of a solid oxygen source, the oxygen release rate coefficient being able to characterize the amount of oxygen released by the solid oxygen source on a lead-bismuth alloy flowing through it, comprising the following steps: S10: determining the temperature, dissolved oxygen concentration, and pressure of the lead-bismuth alloy before it flows through the solid oxygen source; S20: the lead-bismuth alloy flows through the solid oxygen source; S30: determining the time and flow rate of the lead-bismuth alloy flowing through the solid oxygen source; S40: determining the temperature, dissolved oxygen concentration, and pressure of the lead-bismuth alloy after it flows through the solid oxygen source; S50: determining the oxygen release rate coefficient of the solid oxygen source based on the temperature, dissolved oxygen concentration, and pressure determined in step S10, the time and flow rate determined in step S30, and the temperature, dissolved oxygen concentration, and pressure determined in step S40.

[0035] The method for determining the oxygen release rate coefficient of a solid oxygen source provided in the embodiments of this application determines the changes in temperature, dissolved oxygen concentration, and pressure of the lead-bismuth alloy before and after flowing through the solid oxygen source, and combines this with the time and flow rate of the solid oxygen source. This makes the oxygen release rate coefficient of the solid oxygen source determined by multiple parameters, improves the accuracy of the oxygen release rate coefficient of the solid oxygen source, and helps to more accurately characterize the oxygen control capability of the solid oxygen source.

[0036] In some embodiments, the temperature of step S10 and step S40 can be changed to redetermine the oxygen release rate coefficient of the solid oxygen source.

[0037] In some embodiments, the pressure in step S10 and step S40 can be changed to redetermine the oxygen release rate coefficient of the solid oxygen source.

[0038] By changing temperature or pressure conditions, the oxygen release status and rate of solid oxygen source in lead-bismuth alloy under different conditions can be measured, providing data support for oxygen content control in lead-bismuth alloy and improving the accuracy of determining the oxygen release rate coefficient of solid oxygen source.

[0039] Another aspect of this application provides a method for determining the oxygen release rate coefficient of a solid oxygen source. The oxygen release rate coefficient characterizes the amount of oxygen released by the solid oxygen source from a lead-bismuth alloy flowing through it. Figure 1 As shown, it employs the aforementioned apparatus, and the method includes the following steps: S10: determining the temperature, dissolved oxygen concentration, and pressure of the lead-bismuth alloy in the first container 2 before it flows through the solid oxygen source; S20: the lead-bismuth alloy flows through the solid oxygen source; S30: determining the time and flow rate of the lead-bismuth alloy flowing through the solid oxygen source; S40: determining the temperature, dissolved oxygen concentration, and pressure of the lead-bismuth alloy in the second container 3 after it flows through the solid oxygen source; S50: determining the oxygen release rate coefficient of the solid oxygen source based on the temperature, dissolved oxygen concentration, and pressure determined in step S10, the time and flow rate determined in step S30, and the temperature, dissolved oxygen concentration, and pressure determined in step S40.

[0040] The method for determining the oxygen release rate coefficient of a solid oxygen source provided in the embodiments of this application, by employing the aforementioned apparatus 100 for determining the oxygen release rate coefficient of a solid oxygen source, monitors the temperature, dissolved oxygen concentration, and pressure of the lead-bismuth alloy flowing through the solid oxygen source in the first container 2 and the second container 3 before and after the solid oxygen source. This allows the lead-bismuth alloy to be monitored in a stable state, improving the accuracy of the obtained data. Furthermore, by combining the time and flow rate of the lead-bismuth alloy flowing through the solid oxygen source, the accuracy of the oxygen release rate coefficient of the solid oxygen source determined thereby is improved.

[0041] In some embodiments, the first receiving member 2 and the second receiving member 3 can be set to have the same pressure. Since both the first receiving member 2 and the second receiving member 3 are connected to the gas passage 9, the gas pressure can be uniformly adjusted by the pressure adjusting member 6, reducing the need for separate pressure adjustment operations.

[0042] In some embodiments, in the initial state, all controls on the liquid path 7 and the gas path 9 are set to the closed state.

[0043] When filling the first container 2 with lead-bismuth alloy, the first gas path control unit 91, the second gas path control unit 92, and the first liquid path control unit 710 are opened so that the pressure regulating unit 6 can transport the lead-bismuth alloy in the liquid storage unit 1 to the first container 2 by air pressure until the lead-bismuth alloy level in the first container 2 reaches the sensing range of the high liquid level monitoring unit 82. At this time, the first gas path control unit 91, the second gas path control unit 92, and the first liquid path control unit 710 are closed to stop the supply of lead-bismuth alloy to the first container 2. The first container 2 is then set to be heated to a predetermined temperature, and the oxygen content of the lead-bismuth alloy in the first container 2 is adjusted to a predetermined value.

[0044] During the oxygen mass exchange process between the lead-bismuth alloy and the solid oxygen source, the third gas path control device 93 and the fourth gas path control device 94 are opened to connect the first container 2 and the second container 3 under pressure balance. Then, the second liquid path control device 720 is opened so that the lead-bismuth alloy in the first container 2 flows through the solid oxygen source at a uniform speed under the action of gravity and flows into the second container 3, achieving sufficient oxygen mass exchange. Pressure balance can prevent the formation of a pressure difference between the first container 2 and the second container 3, which would cause uneven flow rate of the lead-bismuth alloy.

[0045] During the process of the lead-bismuth alloy flowing out of the first container 2, the liquid level of the lead-bismuth alloy in the first container 2 changes from high to low. The low liquid level monitoring device 81 and the high liquid level monitoring device 82 sense the time of different liquid levels respectively, and the flow rate of the lead-bismuth alloy flowing through the solid oxygen source can be determined based on the time.

[0046] Based on the oxygen content values ​​of the lead-bismuth alloy in the first container 2 and the second container 3 obtained by the oxygen sensor 5, the change in oxygen content in the lead-bismuth alloy is determined, and then the oxygen release rate of the solid oxygen source at a predetermined temperature is determined, and finally the oxygen release rate coefficient is determined.

[0047] After the lead-bismuth alloy test with oxygen mass exchange is completed, the third liquid path control 730 is opened to allow the lead-bismuth alloy to flow back to the reservoir 1 along the third liquid path 73, and all controls on the liquid path 7 and the gas path 9 are closed.

[0048] In some embodiments, the first receiving member 2 and the second receiving member 3 may be configured to have different pressures. The first receiving member 2 and the second receiving member 3 each have independent air chambers and different pressures in their respective air chambers. Since the first receiving member 2 and the second receiving member 3 are not connected to the air passage 9, the adjustment operation of the control components on the air passage 9 is reduced, and the steps are simplified.

[0049] In some embodiments, during the oxygen mass exchange process between the lead-bismuth alloy and the solid oxygen source, the fifth gas path control device 95 is opened to keep the pressure in the second container 3 at a slightly positive pressure; the fourth gas path control device 94 is opened to keep the gas chamber pressure in the first container 2 at a predetermined value under the action of the pressure adjustment device 6; and the second liquid path control device 720 is opened to make the lead-bismuth alloy in the first container 2 flow uniformly through the solid oxygen source and into the second container 3.

[0050] 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.

[0051] The above are merely specific embodiments 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. An apparatus for determining an oxygen release rate coefficient of a solid phase oxygen source, said oxygen release rate coefficient being capable of characterizing the amount of oxygen released by said solid phase oxygen source to a lead bismuth alloy flowing therethrough, characterized in that, It comprises: a liquid storage member configured to store lead-bismuth alloy; a first container, a second container and a solid oxygen source holding member; an oxygen measuring sensor configured to determine the oxygen content of lead-bismuth alloy in the first container and the second container, respectively, the solid oxygen source holding member is configured to hold a solid oxygen source, the liquid storage member is configured to output the lead-bismuth alloy to the first container and then to the second container through the solid oxygen source holding member, the second container is configured to be in fluid communication with the liquid storage member, and the first container is capable of determining the flow rate of lead-bismuth alloy through the solid oxygen source holding member.

2. The device according to claim 1, wherein the first container is disposed at a position higher than the solid oxygen source holding member, the solid oxygen source holding member is disposed at a position higher than the second container; the lead-bismuth alloy is capable of being output from the first container to the second container through the solid oxygen source holding member by gravity, the flow rate of lead-bismuth alloy through the solid oxygen source holding member is determined by the difference in liquid level of lead-bismuth alloy in the first container.

3. The device according to claim 1 or 2, wherein the liquid storage member is disposed at a position lower than the second container.

4. The device according to claim 1, further comprising a pressure adjusting member configured to be in gas communication with the liquid storage member, the first container and the second container to adjust the pressure in the liquid storage member, the first container and the second container.

5. The device according to claim 1, wherein the first container and the second container are configured to heat the contained lead-bismuth alloy to determine its temperature.

6. A method of determining an oxygen release rate coefficient of a solid phase oxygen source, the oxygen release rate coefficient being capable of characterizing the amount of oxygen released by the solid phase oxygen source to a lead bismuth alloy flowing therethrough, characterized in that, It comprises the following steps: S10: determining the temperature, dissolved oxygen concentration and pressure of lead-bismuth alloy without flowing through the solid oxygen source; S20: the lead-bismuth alloy flows through the solid oxygen source; S30: determining the time and flow rate of the lead-bismuth alloy flowing through the solid oxygen source; S40: determining the temperature, dissolved oxygen concentration and pressure of the lead-bismuth alloy after flowing through the solid oxygen source; S50: determining the oxygen release rate coefficient of the solid oxygen source according to the temperature, dissolved oxygen concentration, pressure determined in step S10, the time, flow rate determined in step S30 and the temperature, dissolved oxygen concentration, pressure determined in step S40.

7. The method according to claim 6, wherein the temperature in step S10 is changed, the temperature in step S40 is changed, and the oxygen release rate coefficient of the solid oxygen source is re-determined.

8. The method according to claim 6, wherein the pressure in step S10 is changed and the pressure in step S40 is changed, and the oxygen release rate coefficient of the solid oxygen source is re-determined.

9. A method for determining the oxygen release rate coefficient of a solid oxygen source, which can represent the amount of oxygen released by the solid oxygen source to lead-bismuth alloy flowing therethrough, characterized in that it uses the device of any one of claims 1-5, and the method comprises the following steps: S10: determining the temperature, dissolved oxygen concentration and pressure of the lead-bismuth alloy in the first container without flowing through the solid-phase oxygen source; S20: the lead-bismuth alloy flowing through the solid-phase oxygen source; S30: determining the time and flow rate of the lead-bismuth alloy flowing through the solid-phase oxygen source; S40: determining the temperature, dissolved oxygen concentration and pressure of the lead-bismuth alloy in the second container after flowing through the solid-phase oxygen source; S50: determining the oxygen release rate coefficient of the solid-phase oxygen source according to the temperature, dissolved oxygen concentration and pressure determined in S10, the time and flow rate determined in S30, and the temperature, dissolved oxygen concentration and pressure determined in S40.

10. The method of claim 9, wherein the first container and the second container are set to have the same pressure.

11. The method of claim 9, wherein the first container and the second container are set to have different pressures. ​ ​

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