Measurement system and measurement method

Abstract

Embodiments of the present application provide a measurement system and a measurement method for measuring the content of polonium-210 in high-temperature gas. The measurement system includes: an intake pipeline configured to introduce high-temperature gas into the measurement system; a sampling chamber connected to the intake pipeline for receiving the high-temperature gas introduced by the intake pipeline; a sampling element disposed in the sampling chamber for enriching polonium-210 in the high-temperature gas; a cooling device configured to cool the sampling element so that polonium-210 in the high-temperature gas can be enriched on the sampling element; and a measurement device connected to the sampling chamber and configured to measure the content of polonium-210 on the sampling element. The measurement system and the measurement method provided by the embodiments of the present application form a low-temperature region near the sampling element by cooling the sampling element. When the high-temperature gas flows through the low-temperature region, polonium-210 in the high-temperature gas will precipitate and adsorb on the sampling element. By detecting the polonium-210 on the sampling element, the content of polonium-210 in the high-temperature gas can be determined.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of gas component measurement, and particularly to a measurement system and a measurement method. Background Art

[0002] A lead-bismuth reactor is a reactor that uses a liquid lead-bismuth alloy as a coolant. After the liquid lead-bismuth alloy is irradiated by neutrons, radioactive and toxic polonium-210 will be generated. Polonium-210 will volatilize into the covering gas above the coolant. Due to factors such as accident conditions or the airtightness of the reactor vessel itself, the covering gas containing polonium-210 may be released into the external environment. Therefore, it is necessary to measure the content of polonium-210 in the covering gas in order to perform corresponding treatment on the covering gas based on the content of polonium-210.

[0003] In related technologies, there are methods for measuring the content of polonium-210 in gas by means of enriching and sampling polonium-210 (such as aerosol filter membrane sampling method, solution sampling method, etc.). However, the covering gas in the lead-bismuth reactor is a high-temperature gas. The aerosol filter membrane has poor adsorption performance for polonium-210 at high temperatures, and the solution may be evaporated after introducing high-temperature gas. Therefore, the methods for enriching and sampling polonium-210 in related technologies are not applicable to high-temperature gases. Summary of the Invention

[0004] In view of the above problems, embodiments of the present application provide a measurement system and a measurement method for measuring the content of polonium-210 in high-temperature gas.

[0005] According to the first aspect of the present application, embodiments of the present application provide a measurement system. The measurement system includes: an intake pipeline configured to introduce high-temperature gas into the measurement system; a sampling chamber connected to the intake pipeline for receiving the high-temperature gas introduced by the intake pipeline; a sampling member disposed in the sampling chamber for enriching polonium-210 in the high-temperature gas; a cooling device configured to cool the sampling member so that polonium-210 in the high-temperature gas can be enriched on the sampling member; and a measurement device connected to the sampling chamber and configured to measure the content of polonium-210 on the sampling member.

[0006] According to the second aspect of the present application, embodiments of the present application provide a measurement method. The measurement method includes: setting a sampling member for enriching polonium-210 in high-temperature gas; cooling the sampling member; controlling the high-temperature gas to flow through the sampling member so that the sampling member cools the high-temperature gas, thereby enriching polonium-210 in the high-temperature gas on the sampling member; measuring the content of polonium-210 on the sampling member; and determining the content of polonium-210 in the high-temperature gas based on the content of polonium-210 on the sampling member.

[0007] The measurement system and measurement method provided by the embodiments of the present application cool the sampling piece to form a low-temperature region near the sampling piece. When the high-temperature gas flows through the low-temperature region, the temperature of the high-temperature gas will decrease, and the polonium-210 in the high-temperature gas will precipitate and adsorb on the sampling piece. By detecting the polonium-210 on the sampling piece, the content of polonium-210 in the high-temperature gas can be determined. Description of the Drawings

[0008] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0009] Figure 1 is a schematic diagram of the principle of the measurement system according to an embodiment of the present application;

[0010] Figure 2 is a schematic diagram of the principle of the measurement system according to another embodiment of the present application;

[0011] Figure 3 is a schematic flowchart of the measurement method according to an embodiment of the present application.

[0012] It should be noted that the drawings are not necessarily drawn to scale, and they are only shown in a schematic manner that does not affect the understanding of those skilled in the art. Detailed Embodiments

[0013] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application. For the embodiments of the present application, it should also be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other to obtain new embodiments.

[0014] The embodiments of the present application provide a measurement system. The measurement system can be used to measure the content of polonium-210 in high-temperature gas. The high-temperature gas can be the covering gas above the coolant in a lead-bismuth reactor, such as high-temperature argon. Under the action of the heat released by the reactor core, the temperature of the high-temperature gas can be higher than 300 °C.

[0015] Since the content of polonium-210 is usually low, and the radioactivity generated by other components in the high-temperature gas will interfere with the measurement of the polonium-210 content, it is necessary to first enrich the polonium-210 to separate the polonium-210 from the high-temperature gas and accumulate a certain amount, and then measure the content of polonium-210.

[0016] The methods for enriching polonium-210 used in the related art, such as the aerosol filter membrane sampling method, the solution sampling method, etc., are not applicable to enriching polonium-210 in high-temperature gases. Specifically, in the aerosol filter membrane sampling method, the gas containing polonium-210 is passed through the aerosol filter membrane, and polonium-210 is adsorbed by the aerosol filter membrane to enrich polonium-210. However, when the high-temperature gas passes through the aerosol filter membrane, the temperature of the aerosol filter membrane will increase. After the temperature of the aerosol filter membrane increases, its ability to adsorb polonium-210 will decrease, resulting in inaccurate measurement results. In the solution sampling method, the gas containing polonium-210 is bubbled into the solution, and polonium-210 reacts with the components in the solution to enrich polonium-210. However, after the high-temperature gas is bubbled into the solution, the temperature of the solution will increase until it reaches the boiling state, causing the solution to be easily evaporated and dried, and unable to continue enriching polonium-210. In addition, the solution will also absorb other radioactive components in the gas, which interferes with the measurement of the polonium-210 content.

[0017] Therefore, the embodiments of the present application provide a measurement system that can be used to measure the content of polonium-210 in high-temperature gases.

[0018] Figure 1 It is a schematic diagram of the principle of the measurement system according to the embodiments of the present application. As Figure 1 shown, the measurement system may include an intake pipeline 10, a sampling chamber 20, a sampling member 21, a cooling device 30, and a measurement device 40.

[0019] The intake pipeline 10 is configured to introduce high-temperature gas into the measurement system. The intake pipeline 10 can communicate with the inside of the reactor vessel of the lead-bismuth reactor to introduce the high-temperature gas in the lead-bismuth reactor into the measurement system. The intake pipeline 10 can have a short length to reduce the sedimentation of polonium-210 in the intake pipeline 10. In some embodiments, the intake pipeline 10 can be a straight pipe to avoid the sedimentation of polonium-210 caused by the bent part of the intake pipeline 10 and increase the accuracy of the measurement results. In some embodiments, the inner wall of the intake pipeline 10 is set to be smooth to reduce the adsorption amount of polonium-210 on the inner wall of the intake pipeline 10. In some embodiments, the material of the intake pipeline 10 can be selected as a material with low electrostatic effect and low adsorption and condensation, so as to further reduce the adsorption amount of polonium-210 on the inner wall of the intake pipeline 10. Exemplarily, the intake pipeline 10 can be made of stainless steel.

[0020] The sampling chamber 20 is used to receive the high-temperature gas introduced by the intake pipeline 10. The sampling chamber 20 can be connected to the intake pipeline 10. A receiving cavity can be formed in the sampling chamber 20 to accommodate the sampling member 21. The sampling chamber 20 can be provided with an opening that can be opened and closed to facilitate the insertion and removal of the sampling member 21.

[0021] The sampling piece 21 is used to enrich polonium-210 in high-temperature gas. The sampling piece 21 is arranged in the sampling chamber 20. When the sampling piece 21 enriches polonium-210 in the high-temperature gas, the temperature of the sampling piece 21 can be lower than that of the high-temperature gas. Since the sampling piece 21 is continuously heated by the high-temperature gas during the process of enriching polonium-210, it is difficult for the sampling piece 21 to reach a very low temperature. Therefore, the temperature of the sampling piece 21 can be such that polonium-210 is enriched on the sampling piece 21. In some embodiments, the temperature of the sampling piece 21 can be no higher than 240°C. Due to the relatively low temperature of the sampling piece 21, a local low-temperature region will be formed near the sampling piece 21. After the high-temperature gas enters the sampling chamber 20, it will flow through the low-temperature region near the sampling piece 21, and the temperature of the high-temperature gas will decrease. Polonium-210 in the high-temperature gas will precipitate onto the sampling piece 21, thereby realizing the enrichment of polonium-210 on the sampling piece 21.

[0022] In order to enable the sampling piece 21 to easily maintain a relatively low temperature, in some embodiments, the sampling piece 21 can be made of a heat-conducting material. Exemplarily, the sampling piece 21 can be made of a metal material, specifically, it can be made of materials such as iron, copper, nickel, etc., and the present application does not make any limitations in this regard.

[0023] The cooling device 30 is configured to be able to cool the sampling piece 21 so that the sampling piece 21 can maintain a relatively low temperature in the high-temperature gas, thereby enabling polonium-210 in the high-temperature gas to be enriched on the sampling piece 21. It should be noted that in this embodiment, the cooling device 30 cools the sampling piece 21, rather than cooling the sampling chamber 20 or other structures in the sampling chamber 20, to prevent polonium-210 from being enriched on the sampling chamber 20 or other structures in the sampling chamber 20, which may affect the accuracy of the measurement results. The cooling device 30 can achieve the cooling of the sampling piece 21 through methods such as semiconductor refrigeration and compressed air refrigeration.

[0024] The measuring device 40 is configured to be able to measure the content of polonium-210 on the sampling piece 21. The measuring device 40 is connected to the sampling chamber 20 to measure the content of polonium-210 on the sampling piece 21. The measuring device 40 can measure the content of polonium-210 based on the radioactivity of polonium-210.

[0025] The measurement system provided by the embodiments of the present application cools the sampling piece 21 to form a low-temperature region near the sampling piece 21. When the high-temperature gas flows through the low-temperature region, the temperature of the high-temperature gas will decrease, and polonium-210 in the high-temperature gas will precipitate and adsorb on the sampling piece 21. By detecting the polonium-210 on the sampling piece 21, the content of polonium-210 in the high-temperature gas can be determined.

[0026] In some embodiments, the sampling member 21 is provided with a coating that can react with polonium-210 to form a compound. It can be understood that when polonium-210 precipitates from the high-temperature gas and adsorbs onto the sampling member 21 due to a decrease in temperature, during the subsequent measurement of the content of polonium-210 on the sampling member 21, due to physical shaking, air flow disturbance, temperature change, etc., the polonium-210 adsorbed on the sampling member 21 may volatilize, thus affecting the measurement accuracy. Therefore, in this embodiment, a coating is provided on the sampling member 21. Once polonium-210 is adsorbed onto the sampling member 21, the coating can react with polonium-210 to form a non-volatile and stable compound to prevent the polonium-210 on the sampling member 21 from volatilizing. Exemplarily, the coating can be a rare earth metal coating, and the rare earth metal can be praseodymium (Pr), thulium (Tm), etc.

[0027] In some embodiments, the sampling member 21 is in a sheet shape. The sheet-shaped sampling member 21 can facilitate the direct measurement of the content of polonium-210.

[0028] For the methods of enriching polonium-210 used in the related art, such as the aerosol filter membrane sampling method, the solution sampling method, etc., complex radiochemical sample preparation processes need to be carried out manually to measure the content of polonium-210. Specifically, for the aerosol filter membrane sampling method, the aerosol filter membrane needs to be broken, then dissolved in a solution, and then operations such as precipitation and pH adjustment of the solution are carried out. Finally, polonium-210 is precipitated onto a silver sheet to achieve the measurement of the content of polonium-210; for the solution sampling method, operations such as precipitation and pH adjustment of the solution also need to be carried out, and finally polonium-210 is precipitated onto a silver sheet to achieve the measurement of the content of polonium-210.

[0029] Therefore, in this embodiment, by setting the sampling member 21 in a sheet shape, polonium-210 can be deposited on a flat surface of the sheet-shaped sampling member 21, so that the content of polonium-210 on the surface of the sampling member 21 can be directly measured by means such as α energy spectrum measurement.

[0030] In some embodiments, the sampling member 21 is disposed at a position corresponding to the gas outlet of the intake pipe 10, and the plane where the sampling member 21 is located is perpendicular to the intake pipe 10. In this embodiment, the intake pipe 10 can be arranged along the gravity direction, or at least the pipe section of the intake pipe 10 connected to the sampling chamber 20 is arranged along the gravity direction.

[0031] It can be understood that when high-temperature gas flows through the intake pipeline 10, it is inevitable that some polonium-210 will precipitate. To improve the measurement accuracy, the sampling member 21 can be arranged at a position in the sampling chamber 20 corresponding to the gas outlet of the intake pipeline 10. In this way, when the intake pipeline 10 is arranged along the gravity direction, the polonium-210 precipitated in the intake pipeline 10 will fall on the sampling member 21 under the action of gravity. Moreover, the high-temperature gas flowing out of the gas outlet of the intake pipeline 10 at a certain speed will directly reach the sampling member 21 due to inertia, avoiding the situation where the high-temperature gas does not flow through the low-temperature area near the sampling member 21, and increasing the accuracy of the measurement result.

[0032] Figure 2 It is a schematic diagram of the principle of the measurement system according to another embodiment of the present application. As Figure 2 shown, in some embodiments, the measurement system further includes a heating device 50. The heating device 50 is configured to be able to heat the intake pipeline 10. It can be understood that when high-temperature gas flows through the intake pipeline 10, the temperature may decrease, which may lead to an increase in the precipitation amount of polonium-210 in the intake pipeline 10. Therefore, in this embodiment, by setting the heating device 50, the heating device 50 heats the intake pipeline 10 to maintain or increase the temperature of the high-temperature gas when passing through the intake pipeline 10, reduce the precipitation amount of polonium-210 in the intake pipeline 10, and increase the accuracy of the measurement result. The heating device 50 can be a heating wire, a heating furnace, etc. arranged outside the intake pipeline 10, and the present application does not limit this.

[0033] In some embodiments, the measurement system further includes an outlet pipeline 60 and a circulation pump 61. The outlet pipeline 60 is connected to the sampling chamber 20 and is configured to be able to lead the high-temperature gas out of the measurement system; the circulation pump 61 is arranged on the outlet pipeline 60 and is configured to be able to provide power for the flow of the high-temperature gas in the measurement system.

[0034] It can be understood that the high-temperature gas contains polonium-210 and other radioactive substances. Therefore, it is necessary to prevent the high-temperature gas from leaking into the external environment. In this embodiment, the outlet pipeline 60 and the circulation pump 61 are arranged in the measurement system. The outlet pipeline 60 can communicate with the reactor vessel of the lead-bismuth reactor. The high-temperature gas in the sampling chamber 20 that has precipitated polonium-210 can return to the reactor vessel through the outlet pipeline 60, thus building a complete closed loop for the high-temperature gas.

[0035] The circulation pump 61 provides power for the flow of the high-temperature gas in the measurement system. Since the gas entering the outlet pipeline 60 has been cooled by the sampling member 21 and its temperature is lower than the temperature of the gas in the intake pipeline 10, therefore, arranging the circulation pump 61 on the outlet pipeline 60 can make the circulation pump 61 work at a lower temperature compared to arranging it on the intake pipeline 10, thereby increasing the service life of the circulation pump 61.

[0036] In some embodiments, the cooling device 30 is further configured to cool the gas outlet pipeline 60. Since the cooling effect of the sampling member 21 on the high-temperature gas is limited, in order to further reduce the gas temperature in the gas outlet pipeline 60 and prevent the circulation pump 61 from being damaged by the high-temperature gas, the cooling device 30 can cool the gas outlet pipeline 60.

[0037] In some embodiments, the measuring device 40 includes a conveying part 41 and a measuring part 42. The conveying part 41 is configured to be able to convey the sample 21 to the measuring part 42; the measuring part 42 is configured to be able to determine the content of polonium-210 on the sample 21 based on the radioactivity of the sample 21. In order to realize automated measurement and reduce the process of human participation, a conveying part 41 can be provided, and the conveying part 41 can be automatically controlled by the controller 90. The conveying part 41 can convey the sample 21 to the measuring part 42 to realize the measurement of the sample 21. The conveying part 41 can be a conveyor belt structure, a turntable structure, or a manipulator structure, which is not limited in the present application. After the sample 21 is enriched with polonium-210, it will also be radioactive. The measuring part 42 can determine the content of polonium-210 on the sample 21 based on the radioactivity of the sample 21. For example, the measuring part 42 can be a semiconductor detector capable of alpha spectrum measurement.

[0038] In some embodiments, the measurement system further includes a shielding chamber 70. The shielding chamber 70 is connected to the sampling chamber 20, and the conveying part 41 and the measuring part 42 are arranged in the shielding chamber 70. It can be understood that in the process of conveying the sampling piece 21 from the sampling chamber 20 to the measuring part 42, the sampling chamber 20 needs to be opened to release the sealing state of the sampling chamber 20 to take out the sampling piece, and the sampling chamber 20 contains radioactive and toxic high-temperature gas. In order to prevent the high-temperature gas from leaking into the external environment, in this embodiment, a shielding chamber 70 is provided, and the conveying part 41 and the measuring part 42 are both arranged in the shielding chamber 70. In this way, even after the sampling chamber 20 is opened, the high-temperature gas can only diffuse into the shielding chamber 70 without polluting the external environment. The shielding chamber 70 can be a sealed box made of shielding material.

[0039] In some embodiments, the measuring device 40 further includes a flow meter 43. The flow meter 43 is disposed on the gas outlet pipeline 60 and is configured to perform flow statistics and flow control on the high-temperature gas flowing through the gas outlet pipeline 60.

[0040] After obtaining the content of polonium-210 on the sampling piece 21, in order to calculate the concentration of polonium-210 in the high-temperature gas, it is also necessary to obtain the volume of the gas flowing through the sampling piece 21. Therefore, in this embodiment, the measuring device 40 further includes a flowmeter 43, and the flowmeter 43 is used to count the volume of the high-temperature gas flowing through the outlet gas pipeline 60. The flowmeter 43 is arranged on the outlet gas pipeline 60, which can prevent the flowmeter 43 from being damaged due to high temperature.

[0041] The flowmeter 43 can also control the flow rate of the gas to select an appropriate gas flow rate according to the usage requirements. Specifically, when it is necessary to quickly obtain a rough content of polonium-210, a larger gas flow rate can be used to complete the measurement faster; when it is necessary to obtain an accurate content of polonium-210, a smaller gas flow rate can be used to enable the polonium-210 in the high-temperature gas to be fully adsorbed by the sampling piece 21. In some embodiments, the flowmeter 43 can be a mass flowmeter. In some embodiments, a flow regulating valve can be arranged on the inlet gas pipeline 10, and the flow rate of the gas is jointly regulated by the flow regulating valve and the flowmeter 43.

[0042] In some embodiments, the measuring system further includes a purging device 80. The purging device 80 is configured to purge the residual high-temperature gas in the measuring system to prevent the residual high-temperature gas from affecting the next measurement. The purging device 80 can be connected to the outlet gas pipeline 60 and the shielding chamber 70, and gas is blown into the measuring system by the outlet gas pipeline 60 and the shielding chamber 70 to discharge the residual high-temperature gas in the measuring system. The inlet gas pipeline 10 and the shielding chamber 70 can be connected to a tail gas collection device, and the tail gas collection device is used to receive the purged high-temperature gas. When purging, one path of gas flows through the outlet gas pipeline 60, enters the sampling chamber 20, then enters the inlet gas pipeline 10 from the sampling chamber 20, and finally flows into the tail gas collection device; another path of gas flows into the shielding chamber 70 and then into the tail gas collection device.

[0043] In some embodiments, the measuring system further includes a controller 90. The controller 90 is configured to communicate with one or more of the circulation pump 61, the transfer unit 41, the measuring unit 42, the purging device 80, and the flowmeter 43. The controller 90 can receive signals from the circulation pump 61, the transfer unit 41, the measuring unit 42, the purging device 80, and the flowmeter 43 and transmit them to the display for the operator to observe in real time; the controller 90 can also send signals to the circulation pump 61, the transfer unit 41, the measuring unit 42, the purging device 80, and the flowmeter 43 to control their working states.

[0044] An embodiment of the present application also provides a measuring method for measuring the content of polonium-210 in high-temperature gas.

[0045] As Figure 3As shown, the measurement method may include steps S101 - S105. Specifically: S101, set a sampling member 21, which is used to enrich polonium - 210 in high - temperature gas; S102, cool the sampling member 21; S103, control the high - temperature gas to flow through the sampling member 21, so that the sampling member 21 cools the high - temperature gas, and thus polonium - 210 in the high - temperature gas is enriched on the sampling member 21; S104, measure the content of polonium - 210 on the sampling member 21; S105, based on the content of polonium - 210 on the sampling member 21, determine the content of polonium - 210 in the high - temperature gas.

[0046] The measurement method provided by the embodiments of the present application forms a low - temperature region near the sampling member 21 by cooling the sampling member 21. When the high - temperature gas flows through the low - temperature region, the temperature of the high - temperature gas will decrease, and polonium - 210 in the high - temperature gas will precipitate and adsorb on the sampling member 21. By detecting the polonium - 210 on the sampling member 21, the content of polonium - 210 in the high - temperature gas can be determined.

[0047] In some embodiments, before the high - temperature gas flows through the sampling member 21, a coating is provided on the sampling member 21, and the coating can react with polonium - 210 to form a compound. By providing a coating on the sampling member 21, the volatilization of polonium - 210 adsorbed on the sampling member 21 can be prevented.

[0048] In some embodiments, before the high - temperature gas flows through the sampling member 21, the high - temperature gas is heated; and / or after the high - temperature gas flows through the sampling member 21, the high - temperature gas is cooled. Heating the high - temperature gas before it flows through the sampling member 21 can prevent the precipitation of the high - temperature gas in the intake pipeline 10. After the high - temperature gas flows through the sampling member 21, cooling the high - temperature gas can prevent the high temperature of the high - temperature gas from damaging the structures (such as the circulation pump 61, flowmeter 43, etc.) on the outlet pipeline 60.

[0049] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A measurement system for measuring the content of polonium-210 in high-temperature gas, the measurement system comprises: An intake pipeline (10) configured to introduce the high-temperature gas into the measurement system; A sampling chamber (20) connected to the intake pipeline (10) for receiving the high-temperature gas introduced by the intake pipeline (10); A sampling element (21) disposed in the sampling chamber (20) for enriching polonium-210 in the high-temperature gas; A cooling device (30) configured to cool the sampling element (21) so that polonium-210 in the high-temperature gas can be enriched on the sampling element (21); A measurement device (40) connected to the sampling chamber (20) and configured to measure the content of polonium-210 on the sampling element (21); The sampling element (21) is provided with a coating that can react with polonium-210 to form a compound, The coating is a rare earth metal coating.

2. The measurement system according to claim 1, wherein, The sampling element (21) is sheet-shaped.

3. The measurement system according to claim 2, wherein, The sampling element (21) is disposed at a position corresponding to the gas outlet of the intake pipeline (10), and the plane where the sampling element (21) is located is perpendicular to the intake pipeline (10).

4. The measurement system according to claim 2, wherein, further comprises: A heating device (50) configured to heat the intake pipeline (10).

5. The measurement system according to claim 1, wherein, further comprises: An outlet pipeline (60) connected to the sampling chamber (20) and configured to lead the high-temperature gas out of the measurement system; A circulation pump (61) disposed on the outlet pipeline (60) and configured to provide power for the flow of the high-temperature gas in the measurement system.

6. The measurement system according to claim 5, wherein, The cooling device (30) is further configured to cool the outlet pipeline (60).

7. The measurement system according to claim 5, wherein, The measurement device (40) comprises a transfer part (41) and a measurement part (42); The transfer part (41) is configured to transfer the sampling element (21) to the measurement part (42); The measurement part (42) is configured to determine the content of polonium-210 on the sampling element (21) based on the radioactivity of the sampling element (21).

8. The measurement system according to claim 7, wherein, further comprises: A shielding chamber (70) connected to the sampling chamber (20), and the transfer part (41) and the measurement part (42) are disposed in the shielding chamber (70).

9. The measurement system according to claim 7, wherein, The measurement device (40) further comprises a flowmeter (43); The flowmeter (43) is disposed on the outlet pipeline (60) and configured to perform flow statistics and flow control on the high-temperature gas flowing through the outlet pipeline (60).

10. The measurement system according to claim 9, wherein, further comprises: A purging device (80) configured to purge the residual high-temperature gas in the measurement system.

11. The measurement system according to claim 10, wherein, it further comprises: a controller (90) configured to communicate with one or more of the circulation pump (61), the transfer unit (41), the measurement unit (42), the purging device (80), and the flowmeter (43).

12. A measurement method using the measurement system according to any one of claims 1-11 for measuring the content of polonium-210 in high-temperature gas, the measurement method comprises: setting a sampling member (21) for enriching polonium-210 in the high-temperature gas; cooling the sampling member (21); controlling the high-temperature gas to flow through the sampling member (21) so that the sampling member (21) cools the high-temperature gas, thereby enriching polonium-210 in the high-temperature gas on the sampling member (21); measuring the content of polonium-210 on the sampling member (21); determining the content of polonium-210 in the high-temperature gas based on the content of polonium-210 on the sampling member (21).

13. The method according to claim 12, wherein, before the high-temperature gas flows through the sampling member (21), a coating is provided on the sampling member (21), and the coating can react with polonium-210 to form a compound.

14. The method according to claim 12, wherein, before the high-temperature gas flows through the sampling member (21), the high-temperature gas is heated; and / or after the high-temperature gas flows through the sampling member (21), the high-temperature gas is cooled.

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