Po-210 protection device for high concentration scenarios and method of use thereof

Abstract

This invention relates to the field of radiation protection technology, specifically to a Po-210 protection device for high-concentration scenarios and its usage method. The protection device includes a protective hood with a viewing window on one side. A protective filter box is fitted to the side of the hood with the viewing window, and a blower is fitted to the air inlet of the filter box. The filter box includes a filter housing, the inner cavity of which is filled with impregnated carbon. The impregnated carbon is a material prepared by polonium-specific adsorption metal impregnation treatment. When the protective hood is worn over the operator's head, it can treat the gas inhaled by the operator through the filter box, effectively filtering Po-210 in the gas space and actively supplying air to the protection device. This effectively avoids increased ventilation resistance caused by the filter material inside the filter box, ensuring smooth breathing for the operator. It can be used for the safety protection of operators in scenarios where there is a high concentration of Po-210 in the gas space during a leak in a fourth-generation advanced fast reactor pipeline. The usage method is based on the aforementioned protection device.

Description

Technical Field

[0001] This invention relates to the field of radiation protection device technology, specifically to a Po-210 protection device for high-concentration scenarios and its usage method. Background Technology

[0002] The fourth-generation advanced fast reactor (4GFR) boasts advantages such as high energy density, long operational life, and inherent safety, making it a highly promising reactor type in the current fourth-generation nuclear energy system. However, under fast neutron irradiation in the reactor core, bismuth (Bi-209) in the coolant can be activated into polonium (Po-210), a highly toxic radioactive nuclide with strong volatility. Furthermore, during the long-term operation of the 4GFR, there is a risk of micro-leakage in the piping, posing a significant safety hazard to operation and maintenance personnel. Therefore, it is necessary to develop relevant personal protective equipment.

[0003] In existing technologies, protection against highly volatile and toxic radionuclides in nuclear power plants mainly relies on protective devices such as gas masks and protective clothing, with filter cartridges being the core component of these devices. However, the filter media in existing protective devices primarily uses inorganic adsorbent materials such as activated carbon, which suffers from poor selective adsorption performance and low saturated adsorption capacity for Po-210, making it difficult to effectively filter out Po-210. Summary of the Invention

[0004] To address the technical problem that existing radiation protection devices are unable to effectively filter out Po-210, this invention provides a Po-210 protection device and its usage method for high-concentration scenarios. It can effectively filter Po-210 in the gaseous space and ensure smooth breathing for personnel. It can effectively protect nuclear reactor buildings and related facilities from Po-210 in the gaseous space of rooms, thereby ensuring personnel safety and supporting the safe and sustainable development of fourth-generation advanced fast reactors.

[0005] This invention is achieved through the following technical solution:

[0006] In a first aspect, the present invention provides a Po-210 protective device for high-concentration scenarios, comprising a protective headgear, wherein a viewing window is provided on one side of the protective headgear, and a protective filter box is adapted to the side of the protective headgear where the viewing window is provided, and a blower is adapted to the air inlet end of the protective filter box; the protective filter box includes a filter housing, the inner cavity of the filter housing is filled with impregnated carbon, and the impregnated carbon is a material prepared by polonium-specific adsorption metal impregnation treatment.

[0007] It should be noted that the existing main protection methods for highly volatile and toxic radionuclides are wearing gas masks and protective clothing. The filter materials mainly use inorganic adsorption materials such as activated carbon, which have problems such as poor selective adsorption performance and low saturated adsorption capacity for Po-210, making it difficult to effectively filter out Po-210.

[0008] In view of this, the present invention provides a Po-210 protective device for high-concentration scenarios. The protective hood is fitted with a protective filter box, which includes a filter housing. The inner cavity of the filter housing is filled with impregnated carbon, and the impregnated carbon is a material prepared by polonium-specific adsorption metal impregnation treatment, enabling the protective filter box to have specific adsorption capacity for Po. When the protective hood is worn over the operator's head, the gas inhaled by the operator can be treated by the protective filter box, thereby effectively filtering Po-210 in the gas space. This device can be used for the safety protection of operators in scenarios where there is a high concentration of Po-210 in the gas space during a fourth-generation advanced fast reactor pipeline leak.

[0009] Meanwhile, the impregnated carbon, prepared by a polonium-specific adsorption metal impregnation treatment, adsorbs Po-210 in the gas space. This not only efficiently filters out Po-210, but also rapidly volatilizes the Po-210 adsorbed by the protective filter box through heating, thus regenerating the protective filter box and enabling its recycling, thereby saving the operating cost of the protective device.

[0010] Among them, the Po-210 protective device for high-concentration scenarios provided by the present invention has an air supply fan adapted to the air inlet end of the protective filter box to actively supply air to the protective device, effectively avoiding the increase in ventilation resistance caused by the filter material in the protective filter box, and ensuring smooth breathing for the operator.

[0011] In addition, a viewing window is provided on one side of the protective headgear to provide the operator with a field of vision. This ensures that the operator can directly observe the surrounding environment and perform direct visual operations while protecting the operator, thereby ensuring the convenience of operation and improving work efficiency.

[0012] In summary, the Po-210 protection device for high-concentration scenarios provided by this invention can effectively filter Po-210 in the gaseous space and ensure smooth breathing for personnel. It can effectively protect nuclear reactor buildings and their related supporting facilities from Po-210 in the gaseous space of rooms, thereby ensuring personnel safety and supporting the safe and sustainable development of fourth-generation advanced fast reactors.

[0013] In an optional embodiment of this application, the polonium-specific adsorption metal is one of copper, silver, platinum, nickel and zinc, to ensure that the impregnated carbon has sufficient specific adsorption capacity for Po-210, thereby intercepting and adsorbing Po-210 in the air intake of the protective headgear, while also ensuring that the impregnated carbon has sufficient heating regeneration capacity.

[0014] In an optional embodiment of this application, the filter housing is provided with a filling port to facilitate the rapid loading of impregnated carbon into the inner cavity of the filter housing. The filling port is adapted to a pressure plug, which is used to compact the impregnated carbon, ensuring that the impregnated carbon in the filter housing has sufficient density, thereby enabling the impregnated carbon to efficiently and thoroughly filter and retain Po-210 in the intake air.

[0015] In an optional embodiment of this application, the filling port is fitted with a sealing cap, which is sealed to the filling port to seal the filter housing and prevent leakage of the airflow supplied by the blower.

[0016] In an optional embodiment of this application, the sealing cap is connected to the filter housing by threads or snaps to secure the sealing cap and prevent it from falling off during use of the protective device.

[0017] In an optional embodiment of this application, the air inlet end of the filter housing is fitted with a filter screen to filter out impurities in the air intake of the protective filter box.

[0018] In an optional embodiment of this application, the protective filter box is detachably connected to the protective headgear to facilitate timely and quick replacement of the protective filter box and ensure that the protective headgear can be reused.

[0019] In an optional embodiment of this application, the protective filter box is connected to the protective headgear via a snap-fit ​​structure to ensure that the protective filter box can be quickly connected to the protective headgear and quickly removed from the protective headgear.

[0020] In an optional embodiment of this application, a protective top and protective pants are also included. The protective top is detachably connected to the protective headgear, and the protective pants are detachably connected to the protective top, so as to provide full-body protection for the operator through the separate protective headgear, protective top, and protective pants, ensuring the convenience of using the protective device.

[0021] Secondly, the present invention provides a method for using a Po-210 protective device for high-concentration scenarios, comprising the following steps:

[0022] Install the protective filter box on the protective head cover, and connect the air outlet of the blower to the air inlet of the protective filter box;

[0023] Wear the protective top on your upper body and the protective hood, and connect the protective hood to the protective top;

[0024] Wear the protective pants on your lower body and connect the protective pants to the protective top;

[0025] Turn on the blower to send outside air through the protective filter box into the protective headgear, and then into the protective top and the protective pants;

[0026] If the protection time is exceeded, replace the protective filter box;

[0027] After use, measure the alpha radioactivity of the protective device. If the alpha radioactivity exceeds the limit, replace the protective device.

[0028] The method for using the Po-210 protective device for high-concentration scenarios provided by this invention involves first putting on a protective jacket and a protective hood, then putting on protective pants and connecting them together. Next, the blower is turned on for operation. During operation, if the protection time is exceeded, the protective filter box is replaced. After use, the alpha radioactivity of the protective device is measured. If the alpha radioactivity exceeds the limit, the protective device is replaced. This ensures that operators can use the protective device compliantly, providing protection for personnel safety and supporting the safe and sustainable development of the fourth-generation advanced fast reactor.

[0029] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0030] 1. The present invention provides a Po-210 protective device for high-concentration scenarios. The protective hood is fitted with a protective filter box, which includes a filter housing. The inner cavity of the filter housing is filled with impregnated carbon, and the impregnated carbon is a material prepared by polonium-specific adsorption metal impregnation treatment, enabling the protective filter box to have specific adsorption capacity for Po. When the protective hood is worn over the operator's head, the gas inhaled by the operator can be treated by the protective filter box, thereby effectively filtering Po-210 in the gas space. This device can be used for the safety protection of operators in scenarios where there is a high concentration of Po-210 in the gas space during a fourth-generation advanced fast reactor pipeline leak.

[0031] 2. The Po-210 protection device for high-concentration scenarios provided by this invention uses impregnated carbon prepared by metal impregnation treatment with specific adsorption effect on polonium as the trapping material to adsorb Po-210 in the gas space. It can not only efficiently filter out Po-210, but also quickly volatilize the Po-210 adsorbed by the protective filter box by heating, thereby regenerating the protective filter box and realizing the recycling of the protective filter box, saving the use cost of the protection device.

[0032] 3. The Po-210 protective device for high-concentration scenarios provided by the present invention has an air supply fan adapted to the air inlet end of the protective filter box to actively supply air to the protective device, effectively avoiding the increase in ventilation resistance caused by the filter material in the protective filter box, and ensuring smooth breathing for the operator.

[0033] 4. The Po-210 protective device for high-concentration scenarios provided by the present invention has a viewing window on one side of the protective headgear to provide the operator with an operating field of vision through the viewing window. This ensures that the operator can directly observe the surrounding environment and perform direct visual operations while protecting the operator, thereby ensuring the convenience of the operator's operation and improving work efficiency.

[0034] 5. The method of using the Po-210 protective device for high-concentration scenarios provided by the present invention involves first putting on the protective jacket and protective headgear in sequence, and then putting on the protective pants and connecting them. Then, the blower is turned on for operation. If the protection time is exceeded during operation, the protective filter box is replaced. After use, the alpha radioactivity of the protective device is measured. If the alpha radioactivity exceeds the limit, the protective device is replaced. This ensures that the operator can use the protective device in a compliant manner, thereby providing protection for personnel safety and supporting the safe and sustainable development of the fourth-generation advanced fast reactor. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] In the attached diagram:

[0037] Figure 1 This is a schematic diagram of the structure of a Po-210 protection device for high-concentration scenarios according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the protective filter box structure of the Po-210 protection device for high-concentration scenarios according to an embodiment of the present invention.

[0039] Figure label:

[0040] 10-Protective headgear, 11-Viewing window, 20-Protective filter box, 21-Filter housing, 22-Impregnated carbon, 23-Pressure plug, 24-Sealing cover, 25-Filter screen, 30-Blower, 40-Protective top, 50-Protective pants. Detailed Implementation

[0041] 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, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0045] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] It should be noted that the existing main protection methods for highly volatile and toxic radionuclides are wearing gas masks and protective clothing. The filter media mainly use inorganic adsorbent materials such as activated carbon. However, these materials have problems such as poor selective adsorption performance and low saturated adsorption capacity for Po-210, making it difficult to effectively filter out Po-210. This poses a great safety risk to the operation and maintenance personnel of the fourth-generation advanced fast reactor.

[0047] To address the aforementioned problems, the inventors have innovatively designed the following technical solutions, and the specific implementation scheme of this application will be described in detail below with reference to the accompanying drawings.

[0048] Example 1

[0049] Combination Figure 1 and Figure 2 This embodiment provides a Po-210 protective device for high-concentration scenarios, including a protective headgear 10. A viewing window 11 is provided on one side of the protective headgear 10, and a protective filter box 20 is adapted to the side of the protective headgear 10 where the viewing window 11 is provided. An air supply fan 30 is adapted to the air inlet end of the protective filter box 20. The protective filter box 20 includes a filter housing 21, and the inner cavity of the filter housing 21 is filled with impregnated carbon 22. The impregnated carbon 22 is a material prepared by polonium-specific adsorption metal impregnation treatment.

[0050] It is understandable that the personal protective equipment used in radioactive sites can protect the operator's entire body, meaning that the operator needs to be fully covered by protective clothing when working in a radioactive site.

[0051] In this embodiment, a protective top 40 and protective pants 50 are also included. The protective top 40 is detachably connected to the protective headgear 10, and the protective pants 50 is detachably connected to the protective top 40. This allows for full-body protection of the operator through the separate protective headgear 10, protective top 40, and protective pants 50, ensuring the ease of use of the protective device.

[0052] It should be understood that the protective headgear 10 and the protective jacket 40, as well as the protective jacket 40 and the protective pants 50, are sealed together, such as through sealing tear or sealing magnetic connection components, to prevent radioactive gases or aerosols from entering the inner cavity of the protective device.

[0053] Meanwhile, the protective hood 10, protective jacket 40, and protective pants 50 are all important components of this protective device. Their main materials are high-performance barrier membrane materials, such as polyester film (PET), polyvinyl alcohol film (PVA), polyurethane film (PU), and aluminum foil composite film. Polyester film has good barrier properties and mechanical strength; polyvinyl alcohol film has excellent water vapor barrier properties; polyurethane film combines flexibility and abrasion resistance; and aluminum foil composite film provides excellent barrier performance. In protective clothing, aluminum foil composite film is typically used to effectively isolate aerosols in the air space and prevent radioactive element contact. Its dimensions are similar to those of conventional protective clothing.

[0054] The viewing window 11 installed on the protective headgear 10 is used for the operator's protective observation and must be sealed to the protective headgear 10 body to prevent leakage. The size of the viewing window 11 should not be too large. Generally speaking, the viewing window 11 has a field of view width of 20cm-60cm and a height of 10cm-30cm. For example, a frame with a field of view width of 30cm and a height of 20cm can be used.

[0055] The protective filter box 20 is used to purify and filter the gas entering the protective device, thereby removing Po-210. It is installed on the protective head cover 10 in the working state. Its volume should not be too large. Typically, the protective filter box 20 is cylindrical, with a diameter of 2cm-20cm and a length of 5cm-25cm, such as a diameter of 10cm and a length of 15cm.

[0056] Combination Figure 2 Specifically, in this embodiment, the filter housing 21 of the protective filter box 20 is cylindrical and made of aluminum alloy to reduce the weight of the protective filter box 20 while ensuring sufficient structural strength and stability in the radiation environment, and to avoid adsorbing Po-210 on its outer surface.

[0057] It is understood that the filter housing 21 is provided with a filling port to facilitate the rapid loading of impregnated carbon 22 into the inner cavity of the filter housing 21. The filling port is fitted with a pressure plug 23, which is used to compact the impregnated carbon 22, ensuring that the impregnated carbon 22 in the filter housing 21 has sufficient density, thereby enabling the impregnated carbon 22 to efficiently and thoroughly filter and retain Po-210 in the intake air. A T-shaped plug is typically used for the pressure plug 23 to ensure sufficient installation stability during operation.

[0058] Based on this, the filling port is equipped with a sealing cap 24, which is sealed to the filling port to seal the filter housing 21 and prevent leakage of the airflow supplied by the blower 30.

[0059] In this embodiment, the sealing cover 24 is connected to the filter housing 21 by threads or snaps to fix the sealing cover 24 and prevent the sealing cover 24 from falling off during the use of the protective device.

[0060] Typically, the air inlet end of the filter housing 21 is equipped with a filter screen 25 to filter out impurities in the air entering the protective filter box 20. For radioactive environments, a screen with a diameter controlled between 0.05mm and 3mm is generally used.

[0061] It should be understood that the protective filter box 20 is detachably connected to the protective headgear 10 so that the protective filter box 20 can be replaced quickly and promptly after it reaches the end of its service life, ensuring that the protective headgear 10 can be reused.

[0062] The connection between the protective filter box 20 and the protective head cover 10 can be achieved through a magnetic connection, a threaded connection, or a snap-fit ​​connection. In this embodiment, the protective filter box 20 and the protective head cover 10 are connected by a snap-fit ​​structure to ensure that the protective filter box 20 can be quickly connected to the protective head cover 10 and can be quickly removed from the protective head cover 10.

[0063] Specifically, the buckle connection mechanism between the protective filter box 20 and the protective headgear 10 has a male buckle width of 0.1cm-2cm, while the female buckle width is determined by the male buckle width and the gap.

[0064] It should be noted that the polonium-specific adsorption metal is one of copper, silver, platinum, nickel, and zinc, to ensure that the impregnated carbon 22 has sufficient specific adsorption capacity for Po-210, thereby intercepting and adsorbing Po-210 in the intake air of the protective headgear 10, and also to ensure that the impregnated carbon 22 has sufficient heating regeneration capacity. For wearable protective gear, the weight of the impregnated carbon in the protective filter box 20 is 50g-500g, such as filling 200g of impregnated carbon 22 granules.

[0065] It is known that impregnated carbon-22 (referring to metal-impregnated carbon materials obtained through the impregnation process) is mainly used in metal impregnation technology to improve the performance of activated carbon. Specifically, impregnation is a process of immersing activated carbon material in a solution of metal ions containing specific components to change its surface or internal composition. The impregnation process of carbon-22 typically involves the following steps:

[0066] Clean the surface of the charcoal material: Remove dirt and oxides from the surface of the charcoal material to ensure the uniformity and effectiveness of the impregnation.

[0067] Preparation of impregnation solution: Prepare the appropriate metal ion solution according to the required metal content, usually using nitrates or other compounds.

[0068] Impregnation: The cleaned activated carbon material is immersed in a metal ion solution, usually under specific temperature and time conditions to ensure full penetration.

[0069] Post-treatment: After impregnation, corresponding heating, annealing or quenching treatments are carried out to promote the diffusion and solid solution of the metal in the carbon matrix.

[0070] In addition, because the protective filter box 20 contains specific filter material, there is a risk of high air resistance and difficulty in breathing for operators. Therefore, it is necessary to equip it with an air supply device. In this embodiment, the flow rate of the blower 30 is controlled within the range of 0-50 SLPM, the length of the air duct is 10-100 cm, and the gas source is ambient air.

[0071] In summary, the Po-210 protective device for high-concentration scenarios provided in this embodiment includes a protective headgear 10, a protective top 40, and protective pants 50. The protective headgear 10 is adapted to a protective filter box 20, which includes a filter housing 21. The inner cavity of the filter housing 21 is filled with impregnated carbon 22, and the impregnated carbon 22 is a material prepared by polonium-specific adsorption metal impregnation treatment, so that the protective filter box 20 has a specific adsorption capacity for Po.

[0072] Meanwhile, the impregnated carbon 22, which is made of a material specifically designed for polonium adsorption metal impregnation, adsorbs Po-210 in the gas space. This not only efficiently filters out Po-210, but also rapidly volatilizes the Po-210 adsorbed by the protective filter box 20 through heating, thereby regenerating the protective filter box 20 and enabling its recycling, thus saving the operating cost of the protective device.

[0073] The air inlet of the protective filter box 20 is equipped with a blower 30 to actively supply air to the protective device, effectively avoiding increased air resistance caused by the filter material inside the protective filter box 20, and ensuring smooth breathing for the operator.

[0074] Furthermore, a viewing window 11 is provided on one side of the protective headgear 10 to provide the operator with a field of vision. This ensures that the operator can directly observe the surrounding environment and perform direct visual operations while protecting the operator, thereby ensuring the convenience of the operator's operation and improving work efficiency.

[0075] When the protective headgear 10 is worn over the operator's head, the gas inhaled by the operator can be processed by the protective filter box 20, thereby effectively filtering out Po-210 in the gas space. It can be used for the safety protection of operators in scenarios where there is a high concentration of Po-210 in the gas space during pipeline leaks of the fourth-generation advanced fast reactor.

[0076] In summary, the Po-210 protection device for high-concentration scenarios provided by this invention can effectively filter Po-210 in the gaseous space and ensure smooth breathing for personnel. It can effectively protect nuclear reactor buildings and their related supporting facilities from Po-210 in the gaseous space of rooms, thereby ensuring personnel safety and supporting the safe and sustainable development of fourth-generation advanced fast reactors.

[0077] Example 2

[0078] This embodiment provides a method for using a Po-210 protective device in high-concentration scenarios, including the following steps:

[0079] S10. Install the protective filter box 20 on the protective head cover 10, and connect the air outlet of the blower 30 to the air inlet of the protective filter box 20.

[0080] Specifically, the protective headgear 10 and the protective jacket 40, as well as the protective jacket 40 and the protective pants 50, are sealed together, such as through sealing tear-off or sealing magnetic connection components, to prevent gases containing radioactive elements from entering the inner cavity of the protective device.

[0081] Meanwhile, the protective hood 10, protective jacket 40, and protective pants 50 are all important components of this protective device. Their main materials are high-performance barrier membrane materials, such as polyester film (PET), polyvinyl alcohol film (PVA), polyurethane film (PU), and aluminum foil composite film. Polyester film has good barrier properties and mechanical strength; polyvinyl alcohol film has excellent water vapor barrier properties; polyurethane film combines flexibility and abrasion resistance; and aluminum foil composite film provides excellent barrier performance. In protective clothing, aluminum foil composite film is typically used to effectively isolate aerosols in the air space and prevent radioactive element contact. Its dimensions are similar to those of conventional protective clothing.

[0082] The protective headgear 10 is equipped with a viewing window 11, which is used for the operator's protective observation. It must be sealed to the protective headgear 10 body to prevent leakage. The size of the viewing window 11 should not be too large. Generally speaking, the viewing window 11 has a field of view width of 20cm-60cm and a height of 10cm-30cm. For example, a frame with a field of view width of 30cm and a height of 20cm can be used.

[0083] The protective filter box 20 is used to purify and filter the gas entering the protective device, thereby removing Po-210. It is installed on the protective head cover 10 in the working state. Its volume should not be too large. Typically, the protective filter box 20 is cylindrical, with a diameter of 2cm-20cm and a length of 5cm-25cm, such as a diameter of 10cm and a length of 15cm.

[0084] Combination Figure 2 Specifically, in this embodiment, the filter housing 21 of the protective filter box 20 is cylindrical and made of aluminum alloy to reduce the weight of the protective filter box 20 while ensuring sufficient structural strength and stability in the radiation environment, and to avoid adsorbing Po-210 on its outer surface.

[0085] It is understood that the filter housing 21 is provided with a filling port to facilitate the rapid loading of impregnated carbon 22 into the inner cavity of the filter housing 21. The filling port is fitted with a pressure plug 23, which is used to compact the impregnated carbon 22, ensuring that the impregnated carbon 22 in the filter housing 21 has sufficient density, thereby enabling the impregnated carbon 22 to efficiently and thoroughly filter and retain Po-210 in the intake air. A T-shaped plug is typically used for the pressure plug 23 to ensure sufficient installation stability during operation.

[0086] Based on this, the filling port is equipped with a sealing cap 24, which is sealed to the filling port to seal the filter housing 21 and prevent leakage of the airflow supplied by the blower 30.

[0087] In this embodiment, the sealing cover 24 is connected to the filter housing 21 by threads or snaps to fix the sealing cover 24 and prevent the sealing cover 24 from falling off during the use of the protective device.

[0088] Typically, the air inlet end of the filter housing 21 is equipped with a filter screen 25 to filter out impurities in the air intake of the protective filter box 20. For radioactive environments, a screen with a diameter controlled between 0.05mm and 3mm is generally used.

[0089] It should be understood that the protective filter box 20 is detachably connected to the protective headgear 10 so that the protective filter box 20 can be replaced quickly and promptly after it reaches the end of its service life, ensuring that the protective headgear 10 can be reused.

[0090] The connection between the protective filter box 20 and the protective head cover 10 can be achieved through a magnetic connection, a threaded connection, or a snap-fit ​​connection. In this embodiment, the protective filter box 20 and the protective head cover 10 are connected by a snap-fit ​​structure to ensure that the protective filter box 20 can be quickly connected to the protective head cover 10 and can be quickly removed from the protective head cover 10.

[0091] Specifically, the buckle connection mechanism between the protective filter box 20 and the protective headgear 10 has a male buckle width of 0.1cm-2cm, while the female buckle width is determined by the male buckle width and the gap.

[0092] It should be noted that the polonium-specific adsorption metal is one of copper, silver, platinum, nickel, and zinc, to ensure that the impregnated carbon 22 has sufficient specific adsorption capacity for Po-210, thereby intercepting and adsorbing Po-210 in the intake air of the protective headgear 10, and also to ensure that the impregnated carbon 22 has sufficient heating regeneration capacity. For wearable protective gear, the weight of the impregnated carbon in the protective filter box 20 is 50g-500g, such as filling 200g of impregnated carbon 22 granules.

[0093] It is known that impregnated carbon-22 (referring to carbon-containing materials obtained through the impregnation process) is mainly used in metal impregnation processes to improve the properties of metals. Specifically, impregnation is a process of immersing a metal material in a solution containing specific components to change its surface or internal composition. The carbon-22 impregnation process typically involves the following steps:

[0094] Clean the activated carbon surface: Remove dirt and oxides from the surface of the activated carbon to ensure uniform and effective impregnation.

[0095] Preparation of impregnation solution: Prepare the corresponding metal salt solution according to the required metal content, usually using nitrates or other compounds.

[0096] Impregnation: The cleaned activated carbon is immersed in a metal salt solution, usually under specific temperature and time conditions, to ensure sufficient carbon penetration.

[0097] Post-treatment: After impregnation, corresponding heating, annealing or quenching treatments are carried out to promote the diffusion and solid solution of metal ions in the carbon matrix.

[0098] In this embodiment, silver is used as the polonium-specific adsorbent metal, and the specific preparation method is as follows:

[0099] S101. Wash the activated carbon multiple times with tap water, deionized water, and ethanol, and dry it in an oven at 60-150℃ (e.g., 100℃) for 24-96 hours (e.g., 72 hours), then store it in a dry place for later use.

[0100] S102. After stirring the above activated carbon and silver nitrate in a container for a set time, drain the mixture, wash it with ethanol, dry it again, and then calcine it under a protective atmosphere. Specifically, place 1-10g of the above activated carbon in 2-24ml of silver nitrate solution, stir at 100rpm for 24h, drain the mixture, wash it once with ethanol, and then place it in an oven to dry at 110℃ for 72h. After drying, place the activated carbon in a tube furnace and calcine it under an argon atmosphere for 2 hours for later use.

[0101] S103. After stirring the above-mentioned silver-loaded activated carbon in AgCl solution for a set time, a reduction reaction is carried out, followed by washing, draining, vacuum drying, and high-temperature calcination under a protective atmosphere. Specifically, 1-10g of the above-mentioned silver-loaded activated carbon is dispersed in 50-500ml of AgCl (with a silver gradient of 1-50g / L). After stirring at 300rpm for 30min, ascorbic acid is slowly added to carry out a reduction reaction. The carbon is washed three times with deionized water, and the reduction reaction is carried out for 1h. Then, it is washed three times each with deionized water and anhydrous ethanol. After draining, it is placed in a vacuum drying oven and dried at 95℃ for 24h. Then, it is placed in a tube furnace and calcined at high temperature under an argon atmosphere for 240min to obtain silver-loaded activated carbon.

[0102] Thermal testing has verified that the protective filter cartridge 20 provided in this embodiment can achieve an adsorption rate of over 99.9% for Po-210.

[0103] In addition, because the protective filter box 20 contains specific filter material, there is a risk of high air resistance and difficulty in breathing for operators. Therefore, it is necessary to equip it with an air supply device. In this embodiment, the flow rate of the blower 30 is controlled within the range of 0-50 SLPM, the length of the air duct is 10-100 cm, and the gas source is ambient air.

[0104] S20. Wear the protective top 40 on the upper body and the protective headgear 10, and connect the protective headgear 10 to the protective top 40.

[0105] S30. Wear the protective pants 50 on the lower body and connect the protective pants 50 to the protective top 40.

[0106] S40. Turn on the blower 30 to send outside air through the protective filter box 20 into the protective headgear 10, and into the protective top 40 and the protective pants 50.

[0107] If the protection time is exceeded, the protective filter cartridge 20 shall be replaced. For the aforementioned protective filter cartridge 20 and the operating environment of the fourth-generation advanced fast reactor, the protection time is 30 min-240 min, specifically determined according to the Po-210 concentration in the environment.

[0108] After use, the alpha radioactivity of the protective device is measured. If the alpha radioactivity exceeds the limit, the protective device is replaced. It is understood that after use, the alpha radioactivity of the protective device is measured using a portable on-site total alpha / beta meter. If it exceeds the limit, the protective device must be replaced immediately and the device treated. Correspondingly, the alpha radioactivity limit is 11.1 Bq / m³-111.0 Bq / m³.

[0109] In summary, the method for using the Po-210 protective device for high-concentration scenarios provided in this embodiment involves first putting on the protective jacket 40 to the upper body, then putting on the protective headgear 10, and finally putting on the protective pants 50 to the lower body, connecting them together. Then, the blower 30 is turned on for operation. During operation, if the protection time is exceeded, the protective filter box 20 is replaced. After use, the alpha radioactivity of the protective device is measured. If the alpha radioactivity exceeds the limit, the protective device is replaced. This ensures that operators can use the protective device in a compliant manner, thereby providing protection for personnel safety and supporting the safe and sustainable development of the fourth-generation advanced fast reactor.

[0110] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A Po-210 protection device for high concentration scenarios, characterized in that, Includes a protective headgear (10), a viewing window (11) is provided on one side of the protective headgear (10), and a protective filter box (20) is adapted to the side of the protective headgear (10) where the viewing window (11) is provided, and a blower (30) is adapted to the air inlet end of the protective filter box (20). The protective filter box (20) includes a filter housing (21), the inner cavity of which is filled with impregnated carbon (22), the impregnated carbon (22) being a material prepared by polonium-specific adsorption metal impregnation treatment; The polonium-specific adsorbed metal is silver, and the impregnated carbon (22) is prepared by: S101. Wash the activated carbon multiple times with tap water, deionized water, and ethanol, and dry it in an oven at 60-150℃ for 24-96 hours, then store it in a dry place for later use. S102. Place 1-10g of the above activated carbon in 2-24ml of silver nitrate solution, stir at 100rpm for 24h, drain, wash once with ethanol, place in an oven and dry at 110℃ for 72h, after drying, place the activated carbon in a tube furnace and calcine in an argon atmosphere for 2 hours for later use. S103. Take 1-10g of the above activated carbon and disperse it in 50-500ml of AgCl. Add a silver gradient of 1-50g / L and stir at 300rpm for 30min. Then slowly add ascorbic acid to carry out the reduction reaction. Wash with deionized water 3 times and carry out the reduction reaction for 1h. Wash with deionized water and anhydrous ethanol 3 times each. After draining, place it in a vacuum drying oven and dry at 95℃ for 24h. Then place it in a tube furnace and calcine at high temperature in an argon atmosphere for 240min to obtain silver-loaded activated carbon.

2. The Po-210 protective device for high-concentration scenarios according to claim 1, characterized in that, The filter housing (21) is provided with a filling port, which is adapted to a pressure plug (23) for compacting the impregnated carbon (22).

3. The Po-210 protective device for high-concentration scenarios according to claim 2, characterized in that, The filling port is fitted with a sealing cap (24), which is sealed to the filling port.

4. The Po-210 protective device for high-concentration scenarios according to claim 3, characterized in that, The sealing cap (24) is connected to the filter housing (21) by threads or snaps.

5. The Po-210 protective device for high-concentration scenarios according to claim 1, characterized in that, The air inlet end of the filter housing (21) is fitted with a filter screen (25).

6. The Po-210 protective device for high-concentration scenarios according to claim 1, characterized in that, The protective filter box (20) is detachably connected to the protective headgear (10).

7. The Po-210 protective device for high-concentration scenarios according to claim 6, characterized in that, The protective filter box (20) and the protective headgear (10) are connected by a snap-fit ​​structure.

8. The Po-210 protective device for high-concentration scenarios according to any one of claims 1 to 7, characterized in that, It also includes a protective top (40) and protective pants (50), wherein the protective top (40) is detachably connected to the protective headgear (10), and the protective pants (50) are detachably connected to the protective top (40).

9. A method of using a Po-210 protective device for high-concentration scenarios, characterized in that, The Po-210 protective device for high-concentration scenarios according to any one of claims 1 to 8 includes the following steps: Install the protective filter box (20) on the protective head cover (10) and connect the air outlet of the blower (30) to the air inlet of the protective filter box (20); Wear the protective top (40) on the upper body and the protective headgear (10), and connect the protective headgear (10) to the protective top (40); Wear the protective pants (50) on your lower body and connect the protective pants (50) to the protective top (40); Turn on the blower (30) to send outside air through the protective filter box (20) into the protective headgear (10), and into the protective top (40) and the protective pants (50). If the protection time is exceeded, replace the protective filter box (20). After use, measure the alpha radioactivity of the protective device. If the alpha radioactivity exceeds the limit, replace the protective device.

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