Gas purification system of reactor
By installing a four-stage purification system and a radioactive analyzer in the metal fast reactor, the problem of radioactive gas purification was solved, and the containment was effectively purified and the environment was protected.
Patent Information
- Application Number
- CN202423323133.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing technologies, it is difficult to effectively purify the radioactive mixed gases in metal fast reactors, which may lead to leakage outside the containment vessel in the event of an accident, causing environmental pollution and personal injury.
A gas purification system for a reactor was designed, comprising a four-stage purification process: an inert gas adsorber, an iodine adsorber, a polonium processor, and a filter, combined with a radioactivity analyzer, to remove radioactive gases from the mixed gas and to detect the purification effect.
It effectively removes radioactive gases such as krypton, xenon, iodine, and polonium, ensuring that the purified gas meets emission standards, preventing containment leaks, and avoiding environmental pollution and personnel injury.
Smart Images
Figure CN223871241U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of nuclear reactor safety equipment, and in particular to a reactor gas purification system. Background Technology
[0002] A pool-type metallic fast reactor is a nuclear reactor that uses liquid metal as a coolant. Liquid lead-based alloys are a good reactor coolant. When using liquid lead-based alloys as a coolant, the lead-based alloys will produce radioactive polonium after being exposed to neutron radiation. Due to the high volatility of polonium, under high-temperature conditions, polonium will evaporate from the liquid lead-based alloy coolant and enter the protective gas above the coolant in the form of an aerosol, resulting in a certain amount of radioactive polonium in the protective gas.
[0003] In addition, when the nuclear fuel fission process occurs in a nuclear reactor, large amounts of radioactive iodide gases such as iodine-131 are produced, as well as radioactive inert gases such as krypton-85 and xenon-133. These radioactive gases containing iodine, krypton, and xenon flow along with the coolant and can be released from inside the reactor, eventually mixing with the aforementioned protective gases.
[0004] When a reactor accident occurs, the aforementioned radioactive gas mixture will remain inside the containment vessel. To prevent the release of radioactive gases outside the containment vessel, which could cause environmental pollution and personal injury, there is an urgent need for a purification system for the radioactive gas mixture in a metal fast reactor. Utility Model Content
[0005] This application provides a gas purification system for a reactor. Taking into account the characteristics of radioactive materials in a metallic fast reactor, a four-stage purification treatment device is set up to remove radioactive gases from the mixed gas. In addition, a radioactivity analyzer is also set up to detect and determine whether the radioactivity activity in the gas meets the emission standards, effectively avoiding the problem of radioactive material release caused by containment leakage.
[0006] This application provides a gas purification system for a reactor, installed in the containment of a metallic fast reactor. The gas purification system includes purification pipelines, an inert gas adsorber, an iodine adsorber, a polonium processor, a filter, and a radioactivity analyzer.
[0007] The purification pipeline has an inlet and an outlet. The inlet connects to the containment vessel, and the radioactive gas mixture inside the containment vessel enters the purification pipeline through the inlet. An electric valve is installed at the outlet of the purification pipeline. An inert gas adsorber removes inert gases from the gas mixture. An iodine adsorber removes iodine from the gas mixture. A polonium processor removes polonium from the gas mixture. A filter removes fine particles from the gas mixture. A radioactivity analyzer detects the radioactivity activity of the gas mixture.
[0008] In the purification pipeline, from the inlet end to the outlet end, an inert gas adsorber, an iodine adsorber, a polonium processor, a filter, and a radioactivity analyzer are sequentially installed.
[0009] The gas purification system in this application, tailored to the characteristics of radioactive materials in a metallic fast reactor, employs a four-stage purification process. This includes an inert gas adsorber, an iodine adsorber, a polonium processor, and a filter. The inert gas adsorber effectively removes radioactive inert gases such as krypton and xenon; the iodine adsorber effectively removes radioactive iodide gases; the polonium processor removes slightly larger radioactive polonium aerosols; and the filter removes smaller polonium aerosols and particles of adsorbent materials such as activated carbon and cellulose carried by the airflow. The gas purification system also includes a radioactivity analyzer to detect whether the radioactivity activity in the gas meets emission standards. Gases meeting emission standards are directly discharged into the atmosphere through the outlet of the purification pipeline, thus purifying the containment gas and preventing the release of radioactive materials due to containment leakage.
[0010] In one possible design, the gas purification system also includes:
[0011] A cooler, installed in the purification pipeline and located between the inert gas adsorber and the iodine adsorber, is used to cool the mixed gas.
[0012] In one possible design, the gas purification system also includes:
[0013] The return line is connected at one end to the purification line, with the connection point located between the electric valve and the radioactivity analyzer, and at the other end to the containment vessel;
[0014] A blower, installed on the return line, is used to transport unpurified mixed gas back to the containment.
[0015] In one possible design, the connection points between the cleanroom line and the containment vessel, and the connection points between the return line and the containment vessel, are located on opposite sides of the containment vessel.
[0016] In one possible design, the purification pipeline is equipped with a first isolation valve, which is located between the inert gas adsorber and the containment.
[0017] The return line is equipped with a second isolation valve, which is located between the fan and the containment.
[0018] In one possible design, the inert gas adsorber includes an activated carbon module.
[0019] In one possible design, the iodine adsorber includes an activated carbon module impregnated with triethylenediamine.
[0020] In one possible design, the polonium processor includes at least one of an activated carbon module, a cellulose module, a silicon dioxide module, and a manganese dioxide module.
[0021] In one possible design, the filter includes at least one of polyethersulfone permeation membrane, polypropylene permeation membrane, polyester permeation membrane, polytetrafluoroethylene permeation membrane, cellulose acetate permeation membrane, and polyimide permeation membrane.
[0022] In one possible design, the cooler is a shell-and-tube cooler, with cooling water flowing through the tubes and a mixed gas flowing through the shell. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of an example of the gas purification system provided in the embodiments of this application;
[0025] Figure 2 This is a schematic diagram of another example of the gas purification system provided in the embodiments of this application;
[0026] Figure 3 This is a schematic diagram of another example of the gas purification system provided in the embodiments of this application.
[0027] Figure label:
[0028] 10. Purification pipeline; 11. Air inlet; 12. Air outlet; 13. First isolation valve; 14. Electric valve;
[0029] 20. Cooler;
[0030] 30. Inert gas adsorber;
[0031] 40. Iodine adsorber;
[0032] 50. Polonium processor;
[0033] 60. Filter;
[0034] 70. Radioactive analyzer;
[0035] 80. Return line; 81. Second isolation valve;
[0036] 90. Fan;
[0037] 100. Containment vessel; 101. Reactor container; 102. Reactor core; 103. Metal coolant. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0039] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0041] In the description of this application, it should be understood that the terms "inner," "outer," "upper," "bottom," "front," and "rear," etc., indicate the orientation or positional relationship (if any) based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of facilitating and simplifying the description of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0042] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.
[0043] A pool-type metallic fast reactor is a nuclear reactor that uses liquid metal as a coolant. Liquid lead-based alloys are a good reactor coolant. When using liquid lead-based alloys as a coolant, the lead-based alloys will produce radioactive polonium after being exposed to neutron radiation. Due to the high volatility of polonium, under high-temperature conditions, polonium will evaporate from the liquid lead-based alloy coolant and enter the protective gas above the coolant in the form of an aerosol, resulting in a certain amount of radioactive polonium in the protective gas.
[0044] When nuclear fuel fission occurs in a nuclear reactor, a large amount of radioactive iodine-131 gas is produced. In addition, small amounts of radioactive iodine-129, iodine-123, iodine-124, and iodine-125 gases are also produced. - IO 3- I2, I / O - It exists in forms such as krypton-85 and xenon-133. In addition, when the nuclear fuel fission process occurs in a nuclear reactor, radioactive inert gases such as krypton-85 and xenon-133 are also produced.
[0045] The aforementioned radioactive gases containing polonium, iodine, krypton, and xenon will flow along with the coolant and can be released from inside the reactor, eventually mixing into the aforementioned protective gases.
[0046] When a reactor accident occurs, the aforementioned radioactive gas mixture will remain inside the containment vessel. If a leak occurs in the containment vessel, these radioactive gases will be released into the atmosphere and migrate with the airflow. They may become condensation nuclei for rain and snow at high altitudes, or combine with water droplets through dissolution and chemical reactions and fall to the ground. Through adsorption, absorption, metabolism, and transformation, they can pollute plants and animals on land and in water. They may also re-enter the atmosphere due to water evaporation and wind action, causing secondary air pollution.
[0047] Therefore, in order to prevent the release of radioactive gases outside the containment vessel from causing environmental pollution and personal injury, there is an urgent need in related technologies for a purification system that can target the radioactive mixture in a metal fast reactor.
[0048] In view of this, in order to solve the above-mentioned technical problems, this application provides a gas purification system for a reactor. Taking into account the characteristics of radioactive materials in a metal fast reactor, a four-stage purification treatment device is set up to remove radioactive gases from the mixed gas. In addition, a radioactivity analyzer is also set up to detect and determine whether the radioactivity activity in the gas meets the emission standards, effectively avoiding the problem of radioactive material release caused by containment leakage.
[0049] The gas purification system provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0050] Figure 1 This is a schematic diagram of an example of a reactor gas purification system provided in an embodiment of this application. Figure 1 As shown, the gas purification system is installed in the containment vessel 100 of the metallic fast reactor. The containment vessel 100 protects the nuclear facility from adverse external influences. It is a large-scale special container structure. The containment vessel 100 is structurally divided into single-layer and double-layer containment vessels. The inner layer of the double-layer containment vessel is called the primary containment vessel, and the outer layer is called the secondary containment vessel. An annular cavity is left between the two layers to maintain a certain negative pressure, making it difficult for internal radioactive materials to leak to the outside.
[0051] The containment vessel 100 has a reactor vessel 101 inside, which is filled with a liquid metal coolant 103, such as liquid lead-based alloy, at a certain liquid level. There is a certain space above the liquid metal coolant 103, so that a cavity is formed between the liquid metal coolant 103 and the inner wall of the reactor vessel 101. This cavity is filled with an inert protective gas, such as argon.
[0052] The reactor vessel 101 also houses the reactor core 102, a steam generator, and a main pump. The steam generator is a heat exchange device that produces the steam required by the turbine. The heat generated by nuclear fission in the reactor core 102 is carried away by liquid metal coolant 103 and transferred to the secondary loop working medium—water—through the steam generator, generating steam at a specific temperature and pressure. This steam then enters the turbine to perform work, converting it into electrical or mechanical energy. The main pump drives the liquid metal coolant 103 to circulate within the reactor vessel 101, thereby continuously transferring the heat generated in the reactor core 102 to the secondary loop working medium of the steam generator.
[0053] See also Figure 1 As shown, the gas purification system provided in this application embodiment includes a purification pipeline 10 and an inert gas adsorber 30, an iodine adsorber 40, a polonium processor 50, a filter 60, and a radioactivity analyzer 70 disposed on the purification pipeline 10.
[0054] The purification pipeline 10 has an inlet end 11 and an outlet end 12. The inlet end 11 is connected to the containment 100. The radioactive mixed gas in the containment 100 enters the purification pipeline 10 through the inlet end 11. The outlet end 12 of the purification pipeline 10 is equipped with an electric valve 14. The electric valve 14 consists of an electric actuator and a valve. The electric valve 14 uses electrical energy as power to drive the valve through the electric actuator, thereby achieving the opening and closing action of the valve and realizing the purpose of controlling the opening and closing of the outlet end 12 of the purification pipeline 10.
[0055] The inert gas adsorber 30 is used to remove inert gases from a mixed gas, specifically by adsorption to remove radioactive inert gases such as krypton and xenon.
[0056] The iodine adsorber 40 is used to remove iodine from the mixed gas, specifically by adsorption to remove iodide gas from the mixed gas.
[0057] The polonium processor 50 is used to remove polonium from a mixed gas, specifically by removing polonium-containing aerosols through physical adsorption or chemical reaction.
[0058] The filter 60 is used to remove small particles from the mixed gas. Specifically, it removes polonium aerosols with small particle sizes by adsorption, and can also remove particles of adsorbent materials such as activated carbon and cellulose carried by the gas flow.
[0059] The radioactivity analyzer 70 is used to detect the radioactivity activity of the mixed gas. The electric valve 14 on the purification pipeline 10 can be electrically connected to the controller in the system, and the controller is electrically connected to the radioactivity analyzer 70. The radioactivity analyzer 70 monitors the radioactivity activity of the mixed gas in the purification pipeline 10 in real time. When the radioactivity activity of the purified mixed gas reaches the emission standard, the radioactivity analyzer 70 sends information to the controller, and the controller sends a drive command to the electric valve 14 to open it, thereby opening the gas outlet 12 of the purification pipeline 10.
[0060] From the inlet end 11 to the outlet end 12, the inert gas adsorber 30, iodine adsorber 40, polonium processor 50, filter 60, and radioactivity analyzer 70 are sequentially installed in the purification pipeline 10.
[0061] The gas purification system in this embodiment of the application, taking into account the characteristics of radioactive materials in a metal fast reactor, is equipped with a four-stage purification treatment device, specifically including an inert gas adsorber 30, an iodine adsorber 40, a polonium processor 50, and a filter 60. The inert gas adsorber 30 effectively removes radioactive inert gases such as krypton and xenon; the iodine adsorber 40 effectively removes radioactive iodide gases; the polonium processor 50 removes slightly larger radioactive polonium aerosols; and the filter 60 removes smaller polonium aerosols and particles of adsorbent materials such as activated carbon and cellulose carried by the airflow. The gas purification system in this embodiment of the application also includes a radioactivity analyzer 70, used to detect and determine whether the radioactivity activity in the gas meets emission standards. For gases that meet emission standards, they are directly discharged into the atmosphere through the outlet 12 of the purification pipeline 10, achieving the purpose of purifying the gas in the containment vessel 100 and preventing the release of radioactive materials due to leakage of the containment vessel 100.
[0062] Typically, to enhance the adsorption capacity for iodide gases, the activated carbon module in the iodine adsorber 40 undergoes a special impregnation treatment. This impregnating agent is generally triethylenediamine (TDE), which has a high affinity for the adsorption, chelation, and retention of various iodides, and exhibits high activity at operating temperatures below 100°C. Since the mixed gas released from the stack container 101 is generally above 200°C, it is necessary to cool the mixed gas to a temperature suitable for the operating temperature of the iodine adsorber 40 and other devices. Based on these factors, the gas purification system also includes a cooler 20, specifically designed as follows.
[0063] Figure 2 This is a schematic diagram of another example of a reactor gas purification system provided in an embodiment of this application. For example... Figure 2 As shown, in one embodiment provided in this application, the gas purification system further includes a cooler 20, which is disposed in the purification pipeline 10 and located between the inert gas adsorber 30 and the iodine adsorber 40, for cooling the mixed gas.
[0064] In this embodiment, the mixed gas enters the cooler 20 to be cooled to a temperature sufficient to meet the operating temperature of devices such as the iodine adsorber 40. This ensures the effective adsorption and removal of iodides by the iodine adsorber 40, allowing the radioactive iodide gas in the mixed gas to be completely purified. The cold source for the cooler 20 can be the equipment cooling water system. The cooler 20 can be a shell-and-tube type, with cooling water flowing through the tubes and the mixed gas flowing through the shell.
[0065] Figure 3 This is a schematic diagram of another example of a reactor gas purification system provided in an embodiment of this application. For example... Figure 3As shown, in one embodiment provided in this application, the gas purification system further includes a return line 80 and a fan 90. One end of the return line 80 is connected to the purification line 10, with the connection point located between the electric valve 14 and the radioactivity analyzer 70. The other end of the return line 80 is connected to the containment vessel 100. The fan 90 is disposed in the return line 80 and is used to transport the unpurified mixed gas back to the containment vessel 100.
[0066] In this embodiment, the purification pipeline 10 and the return pipeline 80 together form a circulation pipeline, which can circulate and purify mixed gases that do not meet emission requirements through the return pipeline 80 to ultimately meet emission standards, thereby purifying the gas in the containment 100 and preventing the release of radioactive materials caused by leakage of the containment 100.
[0067] For example Figure 3 As shown, in one embodiment provided in this application, the connection between the purification pipeline 10 and the containment 100 and the connection between the return pipeline 80 and the containment 100 are located on both sides of the containment 100.
[0068] In this embodiment, the connection between the purification pipeline 10 and the containment vessel 100, and the connection between the return pipeline 80 and the containment vessel 100, are located on both sides of the containment vessel 100, so that the fan 90 can blow out as much gas as possible from the containment vessel 100, so that the mixed gas in the containment vessel 100 can be fully purified.
[0069] For example Figure 3 As shown, in one embodiment provided in this application, the purification pipeline 10 is provided with a first isolation valve 13, which is located between the inert gas adsorber 30 and the containment vessel 100. The return pipeline 80 is provided with a second isolation valve 81, which is located between the fan 90 and the containment vessel 100.
[0070] The working principle of the isolation valve is based on controlling the flow of fluid by opening and closing the valve disc. When the isolation valve is closed, a seal is formed between the valve disc and the valve seat, preventing fluid from passing through the pipeline. When the isolation valve is open, the valve disc separates from the valve seat, allowing fluid to flow freely. The isolation valve can be operated manually, electrically, or pneumatically. In this embodiment, the first isolation valve 13 and the second isolation valve 81 can be electrically operated and are electrically connected to the system controller. During normal reactor operation, the first isolation valve 13 and the second isolation valve 81 are closed, performing the isolation function of the containment 100. Only when the radioactivity level in the containment 100 exceeds the limit in the event of an accident can the controller drive the first isolation valve 13 and the second isolation valve 81 to open, thereby activating the gas purification system.
[0071] In one embodiment provided in this application, the inert gas adsorber 30 includes an activated carbon module.
[0072] The activated carbon used in the activated carbon module can be made from carbon-containing materials such as sawdust, nutshells, and lignite through carbonization and activation. Activated carbon can be in powder or granular form. The activated carbon material is made into blocks or sheets to form activated carbon modules, and multiple activated carbon modules are installed in the adsorber housing using supports.
[0073] In one embodiment provided in this application, the iodine adsorber 40 includes an activated carbon module impregnated with triethylenediamine.
[0074] In this embodiment, in addition to having an activated carbon module, the activated carbon module of the iodine adsorber 40 is also impregnated with triethylenediamine in order to improve the adsorption capacity for iodide gas.
[0075] In one embodiment provided in this application, the polonium processor 50 includes at least one of an activated carbon module, a cellulose module, a silicon dioxide module, and a manganese dioxide module.
[0076] Cellulose materials are inherently non-toxic and harmless, and can be prepared into porous materials, exhibiting characteristics such as high-efficiency adsorption, low fluid resistance, and non-toxicity. Cellulose materials are fabricated into blocks or sheets to form cellulose modules, which are then installed in the processor housing using a support structure.
[0077] Silica materials have numerous micropores and mesopores on their surface, allowing them to adsorb a certain amount of gas, liquid, or solute molecules. This adsorption is based on intermolecular van der Waals forces and exhibits high selectivity, making it suitable for gas separation and liquid purification. Silica materials can be fabricated into blocks or sheets to form silica modules, which are then mounted in the processor housing using a support structure.
[0078] Manganese dioxide materials exhibit excellent adsorption properties, demonstrating a strong adsorption capacity for various heavy metal ions. Its adsorption mechanisms primarily include surface adsorption, pore adsorption, and chemisorption. Manganese dioxide materials are fabricated into blocks or sheets to form manganese dioxide modules, which are then mounted in the processor housing using a support structure.
[0079] In one embodiment provided in this application, the filter 60 includes at least one of a polyethersulfone permeation membrane, a polypropylene permeation membrane, a polyester permeation membrane, a polytetrafluoroethylene permeation membrane, a cellulose acetate permeation membrane, and a polyimide permeation membrane.
[0080] A permeable membrane is a membrane material with a microporous structure, which can be used in various applications such as separation, filtration, and purification. Depending on the material, permeable membranes can be divided into organic permeable membranes and inorganic permeable membranes. Among them, organic permeable membranes are the most widely used, mainly made of polymer raw materials, and have the characteristics of being lightweight, high-strength, and resistant to fouling. In this embodiment, the filter 60 made of the above-mentioned polymer membrane material can be used to filter polonium aerosol particles or adsorbent material particles with a particle size greater than or equal to 0.1 μm in a mixed gas, with a filtration efficiency greater than or equal to 99%, resulting in good gas purification effect.
[0081] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A gas purification system for a reactor, installed in the containment vessel (100) of the reactor, characterized in that, include: The purification pipeline (10) has an inlet end (11) and an outlet end (12). The inlet end (11) is connected to the containment vessel (100). The radioactive mixed gas in the containment vessel (100) enters the purification pipeline (10) through the inlet end (11). The outlet end (12) of the purification pipeline (10) is equipped with an electric valve (14). An inert gas adsorber (30) is used to remove inert gases from the mixed gas; Iodine adsorber (40) is used to remove iodine from the mixed gas; A polonium processor (50) for removing polonium from the gas mixture; A filter (60) is used to remove small particles from the gas mixture; A radioactivity analyzer (70) is used to detect the radioactivity activity of the gas mixture; In the purification pipeline (10), from the air inlet (11) to the air outlet (12), the inert gas adsorber (30), the iodine adsorber (40), the polonium processor (50), the filter (60), and the radioactivity analyzer (70) are sequentially arranged.
2. The gas purification system according to claim 1, characterized in that, Also includes: A cooler (20) is provided in the purification pipeline (10) and located between the inert gas adsorber (30) and the iodine adsorber (40) for cooling the mixed gas.
3. The gas purification system according to claim 1, characterized in that, Also includes: The return line (80) is connected at one end to the purification line (10) with the connection point located between the electric valve (14) and the radioactive analyzer (70), and at the other end to the containment vessel (100). A fan (90) is installed in the return line (80) for transporting the unpurified mixed gas back to the containment (100).
4. The gas purification system according to claim 3, characterized in that, The connection between the purification pipeline (10) and the containment vessel (100) and the connection between the return pipeline (80) and the containment vessel (100) are located on both sides of the containment vessel (100).
5. The gas purification system according to claim 3, characterized in that, The purification pipeline (10) is equipped with a first isolation valve (13), which is located between the inert gas adsorber (30) and the containment vessel (100). The return line (80) is equipped with a second isolation valve (81), which is located between the fan (90) and the containment vessel (100).
6. The gas purification system according to any one of claims 1-5, characterized in that, The inert gas adsorber (30) includes an activated carbon module.
7. The gas purification system according to any one of claims 1-5, characterized in that, The iodine adsorber (40) includes an activated carbon module impregnated with triethylenediamine.
8. The gas purification system according to any one of claims 1-5, characterized in that, The polonium processor (50) includes at least one of an activated carbon module, a cellulose module, a silicon dioxide module, and a manganese dioxide module.
9. The gas purification system according to any one of claims 1-5, characterized in that, The filter (60) includes at least one of the following: polyethersulfone permeation membrane, polypropylene permeation membrane, polyester permeation membrane, polytetrafluoroethylene permeation membrane, cellulose acetate permeation membrane, and polyimide permeation membrane.
10. The gas purification system according to claim 2, characterized in that, The cooler (20) is a shell-and-tube cooler (20), with cooling water flowing into the tube and the mixed gas flowing into the shell.