A method and system for cleaning a uranium hexafluoride sample container

Abstract

The application provides a cleaning method and system of a uranium hexafluoride sampling container. The cleaning method is applied to a cleaning system of the uranium hexafluoride sampling container, the cleaning system comprises a heating device, a purification device and a cleaning and drying device, and the method comprises the following steps: heating the uranium hexafluoride sampling container by using the heating device according to a preset temperature and a preset heating time, so as to obtain a heated sampling container; emptying the uranium hexafluoride in the heated sampling container by using the purification device, so as to obtain a purified sampling container; soaking the purified sampling container by using the cleaning and drying device and a prepared soaking solution according to a preset soaking time, so as to obtain a soaked sampling container; and cleaning and drying the sampling container by using the cleaning and drying device, so as to obtain a usable sampling container. The application has the advantages of simple operation process, reduced labor intensity and small amount of waste liquid generated during cleaning.

Description

Technical Field

[0001] This invention relates to the field of uranium conversion production technology, and in particular to a cleaning method and system for uranium hexafluoride sampling containers. Background Technology

[0002] In recent years, with the rapid development of the nuclear fuel industry, the production scale of uranium hexafluoride (UF6) has gradually expanded, leading to a rapid increase in the usage and cleaning workload of UF6 sampling containers in the production process. The cleanliness of the UF6 sampling containers directly affects the purity of the upstream UF6 feed product, and the waste liquid generated from sampling container cleaning accounts for approximately 80% of the total waste liquid in uranium enrichment plants. Currently, commonly used cleaning methods for UF6 sampling containers suffer from drawbacks such as complex operation procedures, large amounts of cleaning waste liquid generation, and high workload. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a cleaning method and system for uranium hexafluoride sampling containers, so as to solve the problems of complex operation, large amount of cleaning waste liquid generated and high labor intensity of existing cleaning methods.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0005] A cleaning method for uranium hexafluoride sampling containers, applied to a cleaning system for uranium hexafluoride sampling containers, the cleaning system comprising a heating device, a purification device, and a cleaning and drying device, the method comprising:

[0006] The uranium hexafluoride sampling container is heated using the heating device according to the preset temperature and preset heating time to obtain the heated sampling container;

[0007] The uranium hexafluoride in the heated sampling container is emptied using the purification device to obtain a purified sampling container.

[0008] According to the preset soaking time, the purified sampling container is soaked in the cleaning and drying device and the prepared soaking solution to obtain the soaked sampling container.

[0009] The sampling container is cleaned and dried using the cleaning and drying device to obtain a usable sampling container.

[0010] Further, the uranium hexafluoride in the heated sampling container is emptied using the purification device to obtain a purified sampling container, comprising:

[0011] Connect the heated sampling container to the purification device;

[0012] Wrap an electric heating belt around the heated sampling container;

[0013] Open the inverted purification valve and the DN6 right-angle stop valve to empty the uranium hexafluoride in the heated sampling container, thus obtaining a purified sampling container. The DN6 right-angle stop valve is connected to the connector at the front end of the inverted purification valve and the heated sampling container.

[0014] Furthermore, the prepared soaking solution includes:

[0015] Soak the sample in a 5% sodium carbonate solution prepared with distilled water.

[0016] Further, according to the preset soaking time, the purified sampling container is soaked using the cleaning and drying device and the prepared soaking solution to obtain the soaked sampling container, comprising:

[0017] The sodium carbonate solution is heated to obtain a heated sodium carbonate solution;

[0018] The purified sampling container is immersed in the heated sodium carbonate solution for a preset soaking time to obtain the soaked sampling container.

[0019] Furthermore, the sampling container is cleaned and dried using the aforementioned cleaning and drying device to obtain a usable sampling container, comprising:

[0020] The soaked sampling container is cleaned using the cleaning and drying device and the prepared citric acid solution to obtain a sampling container after one cleaning.

[0021] The sampling container after one cleaning is rinsed multiple times using the heated distilled water to obtain a rinsed sampling container.

[0022] The rinsed sampling container is dried using the cleaning and drying device to obtain a usable sampling container.

[0023] Further, the soaked sampling container is cleaned using the aforementioned cleaning and drying device and the prepared citric acid solution to obtain a single-cleaned sampling container, comprising:

[0024] The soaked sampling container is installed on the steam heating tube of the cleaning and drying device, and cleaned using steam and a prepared citric acid solution to obtain a sample container after one cleaning.

[0025] Further, the sampling container after the first cleaning is rinsed multiple times using the heated distilled water to obtain a rinsed sampling container, comprising:

[0026] The sampling container after one cleaning is rinsed multiple times using the heated distilled water to obtain a rinsed sampling container.

[0027] The rinsing solution obtained from the final rinsing was sampled and analyzed to obtain the analytical results.

[0028] Based on the analysis results, the number of times the sampling container is cleaned after the first cleaning is adjusted.

[0029] Furthermore, based on the analysis results, the number of rinsing cycles for the sampling container after the first cleaning is adjusted, including:

[0030] If the analysis results do not meet any of the following conditions: molybdenum and titanium in the rinsing solution are both less than 0.1 μg / mL, and iron, calcium, and sodium in the rinsing solution are all less than 20 μg / mL, then the rinsing should be repeated.

[0031] Furthermore, the rinsed sampling container is dried using the cleaning and drying device to obtain a usable sampling container, comprising:

[0032] The rinsed sampling container is purged and dried using nitrogen gas in the cleaning and drying device to obtain a sample container after one drying process.

[0033] The sampling container, after being dried once, is placed in the constant temperature chamber of the cleaning and drying device for a second drying to obtain a usable sampling container.

[0034] According to another aspect of the present invention, a cleaning system for a uranium hexafluoride sampling container is provided, comprising a heating device, a purification device, and a cleaning and drying device, wherein,

[0035] The heating device includes a heating box, an electric heating belt, and a constant temperature box;

[0036] The purification device includes a uranium hexafluoride collection container, a purification system branch pipe connected to the uranium hexafluoride collection container, and a sample inversion purification valve and a connector connected to a DN6 right-angle shut-off valve installed on the purification system branch pipe.

[0037] The cleaning and drying device includes a steam pipe, a nitrogen pipe, and a heating pipe, wherein the steam pipe and the nitrogen pipe are both connected to the heating pipe.

[0038] The uranium hexafluoride sampling container is heated using the heating device according to the preset temperature and preset heating time to obtain the heated sampling container;

[0039] The uranium hexafluoride in the heated sampling container is emptied using the purification device to obtain a purified sampling container.

[0040] According to the preset soaking time, the purified sampling container is soaked in the cleaning and drying device and the prepared soaking solution to obtain the soaked sampling container.

[0041] The sampling container is cleaned and dried using the cleaning and drying device to obtain a usable sampling container.

[0042] The above-described solution of the present invention has at least the following beneficial effects:

[0043] The above-described solution of the present invention first heats the uranium hexafluoride sampling container, then purifies it using a purification device, and finally cleans and dries it using a cleaning and drying device. The cleaning method has a simple operation process, which helps to reduce labor intensity. Moreover, the purification device facilitates the emptying and collection of uranium hexafluoride in the uranium hexafluoride sampling container, resulting in a small amount of cleaning waste liquid generated. Attached Figure Description

[0044] Figure 1 This is a schematic flowchart of the cleaning method for the uranium hexafluoride sampling container of the present invention;

[0045] Figure 2 This is a schematic diagram of the purification device of the cleaning system for the uranium hexafluoride sampling container of the present invention;

[0046] Figure 3 This is a schematic diagram of the cleaning and drying device of the cleaning system for the uranium hexafluoride sampling container of the present invention.

[0047] Explanation of reference numerals in the attached drawings: 1-Uranium hexafluoride container, 2-Purification system branch pipe, 3-Sample inversion purification valve, 4-Uranium hexafluoride sampling container, 5-DN6 right-angle stop valve, 6-Connector, 7-Steam pipe, 8-Nitrogen pipe, 9-Heating pipe. Detailed Implementation

[0048] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0049] like Figure 1 As shown, an embodiment of the present invention proposes a cleaning method for a uranium hexafluoride sampling container, applied to a cleaning system for uranium hexafluoride sampling containers. The cleaning system includes a heating device, a purification device, and a cleaning and drying device. The method includes the following steps:

[0050] S1. The uranium hexafluoride sampling container is heated using the heating device according to the preset temperature and preset heating time to obtain the heated sampling container;

[0051] S2. Use the purification device to empty the uranium hexafluoride from the heated sampling container to obtain a purified sampling container.

[0052] S3. Soak the purified sampling container in the cleaning and drying device and the prepared soaking solution according to the preset soaking time to obtain the soaked sampling container.

[0053] S4. The sampling container is cleaned and dried using the cleaning and drying device to obtain a usable sampling container.

[0054] In this embodiment of the invention, the uranium hexafluoride sampling container is first heated, then purified using a purification device, and finally cleaned and dried using a cleaning and drying device. The cleaning method has a simple operation process, which helps reduce labor intensity. Furthermore, the purification device facilitates the emptying and collection of uranium hexafluoride from the sampling container, resulting in a low volume of cleaning waste liquid.

[0055] In practice, the heating device includes a heating box, which is used to heat the uranium hexafluoride sampling container, causing the residual uranium hexafluoride in the container to vaporize, which facilitates subsequent emptying and collection of uranium hexafluoride.

[0056] In an optional embodiment of the present invention, S2 includes:

[0057] S21. Connect the heated sampling container to the purification device;

[0058] S22. Wrap an electric heating belt around the heated sampling container;

[0059] S23. Open the inverted sample purification valve and the right-angle stop valve to empty the uranium hexafluoride in the heated sampling container into the uranium hexafluoride collection container, thus obtaining a purified sampling container. The right-angle stop valve is connected to the connector at the front end of the inverted sample purification valve and the heated sampling container.

[0060] The right-angle stop valve can be a DN6 right-angle stop valve. Uranium hexafluoride sampling containers are generally used in conjunction with DN6 right-angle stop valves. In practice, a 100°C electric heating tape is wrapped around the heated sampling container and the DN6 right-angle stop valve to prevent condensation from forming on the sampling container and the valve, which could prevent the uranium hexafluoride from being poured out or cause blockage at the valve. Opening the DN6 right-angle stop valve allows the vaporized uranium hexafluoride in the sampling container to flow into the uranium hexafluoride collection container and be collected, thus emptying the uranium hexafluoride from the sampling container.

[0061] In an optional embodiment of the present invention, the prepared soaking solution comprises:

[0062] A 5% sodium carbonate solution was prepared using distilled water.

[0063] A 5% sodium carbonate solution is used to soak DN6 right-angle stop valves and sampling containers to improve the cleaning effect.

[0064] In an optional embodiment of the present invention, S3 includes:

[0065] S31. The sodium carbonate solution and distilled water are heated to obtain heated sodium carbonate solution and heated distilled water;

[0066] S32. Immerse the purified sampling container in the heated sodium carbonate solution for a preset soaking time to obtain the soaked sampling container.

[0067] S33. Immerse the DN6 right-angle stop valve and its components in the heated sodium carbonate solution according to the preset soaking time to obtain the soaked DN6 right-angle stop valve.

[0068] Soaking the sampling container and the DN6 right-angle shut-off valve and its components in a heated sodium carbonate solution can improve the cleaning effect of the sampling container.

[0069] In an optional embodiment of the present invention, S4 includes:

[0070] S41. The soaked sampling container is cleaned using the cleaning and drying device and the prepared citric acid solution to obtain a sampling container after one cleaning.

[0071] S42. The sampling container after one cleaning and the DN6 right-angle stop valve and its components after soaking are rinsed multiple times using the heated distilled water to obtain the rinsed sampling container and the rinsed DN6 right-angle stop valve and its components.

[0072] S43. The rinsed sampling container and the rinsed DN6 right-angle stop valve and its components are dried using the cleaning and drying device to obtain a usable sampling container and a usable DN6 right-angle stop valve and its components.

[0073] In practice, the prepared citric acid solution is a 5% citric acid solution made with distilled water. During the cleaning process, the 5% citric acid solution is sprayed onto the bottle every 10 minutes to improve the cleanliness and smoothness of the bottle surface. After one cleaning, multiple sampling containers are grouped together and rinsed 2-3 times with heated distilled water to further clean the sampling containers and improve cleaning efficiency. After cleaning, the sampling containers are purged and dried with nitrogen gas, and then placed in a constant temperature chamber at 85℃~95℃ for 30 minutes to achieve thorough drying. The dried sampling containers can be reused.

[0074] In an optional embodiment of the present invention, S41 includes:

[0075] The soaked sampling container is installed on the steam heating tube of the cleaning and drying device, and cleaned using steam and a prepared citric acid solution to obtain a sample container after one cleaning.

[0076] In practice, the sampling container can be removed from the 5% sodium carbonate solution and installed on a steam heating tube. The inside of the container can be cleaned with 0.3 MPa steam for 60 minutes to improve its cleanliness. During the steam cleaning process, a 5% citric acid solution can be sprayed onto the container every 10 minutes to improve surface smoothness.

[0077] In an optional embodiment of the present invention, S42 includes:

[0078] S421. The sampling container after one cleaning and the DN6 right-angle stop valve and its components after soaking are rinsed multiple times using the heated distilled water to obtain the rinsed sampling container and the rinsed DN6 right-angle stop valve.

[0079] S422. Sample and analyze the rinsing solution obtained from the final rinsing, and obtain the analysis results;

[0080] S423. Based on the analysis results, adjust the number of times the sampling container after the first cleaning and the DN6 right-angle shut-off valve and its components after soaking are cleaned.

[0081] By sampling and analyzing the rinsing solution of the rinsing container, the composition and content of residues in the rinsing solution can be obtained, thereby determining the cleanliness of the sampling container, the DN6 right-angle stop valve and its components. If the cleanliness does not meet expectations, the sampling container, the DN6 right-angle stop valve and its components should be cleaned again.

[0082] In an optional embodiment of the present invention, S423 includes:

[0083] If the analysis results do not meet any of the following conditions: molybdenum and titanium in the rinsing solution are both less than 0.1 μg / mL, and iron, calcium, and sodium in the rinsing solution are all less than 20 μg / mL, then the number of times the sampling container is cleaned after the first cleaning should be increased.

[0084] In practice, the iron, calcium, and sodium levels are all blank values ​​minus distilled water. If the molybdenum and titanium levels in the rinsing solution after rinsing the sampling container are both <0.1 μg / mL, and the iron, calcium, and sodium levels are <20 μg / mL, it indicates that the cleanliness of the sampling container has met expectations, and the next step of drying can proceed. Otherwise, the sampling container, the DN6 right-angle shut-off valve, and its components should be cleaned again.

[0085] In an optional embodiment of the present invention, S43 includes:

[0086] S431. Using nitrogen gas in the cleaning and drying device, the rinsed sampling container and the rinsed DN6 right-angle stop valve and its components are purged and dried to obtain a sampled container and a DN6 right-angle stop valve and its components after one drying.

[0087] S432. Place the sample container and the DN6 right-angle stop valve and its components after the first drying into the constant temperature chamber of the cleaning and drying device for a second drying to obtain a usable sample container and a usable DN6 right-angle stop valve and its components.

[0088] Nitrogen gas offers advantages such as rapid drying, excellent drying effect, uniform drying temperature, and energy efficiency. Using nitrogen gas to purge and dry the rinsed sampling containers, DN6 right-angle stop valves, and their components can improve overall work efficiency and reduce costs. A secondary drying process using a constant temperature chamber ensures the dryness of the sampling containers, DN6 right-angle stop valves, and their components, further improving the efficiency of the cleaning process.

[0089] A specific embodiment of the cleaning method for the uranium hexafluoride sampling container of the present invention is as follows:

[0090] Place the sampling container in a heating chamber, set the temperature to 120℃, and heat it at this constant temperature for approximately 2 hours to vaporize any residual sulfur hexafluoride inside, facilitating emptying and collection. Remove the sampling container from the heating chamber and connect it to the front end of the decanting purification valve installed on the branch pipe of the sampling container purification system. Wrap electric heating tape (100℃) around the sampling container body and the DN6 right-angle stop valve (a valve type with a DN6 pipe diameter) to prevent condensation from the sampling container and the DN6 right-angle stop valve, which could prevent the uranium hexafluoride from being poured out or cause blockage at the valve. The inlet and outlet diameters of the DN6 right-angle stop valve are perpendicular to each other, resembling an L-shaped or 90-degree bend in the pipe, allowing for installation and operation in narrow spaces. Figure 2 Open the front-end sampling purification valve and DN6 right-angle shut-off valve of the sampling container to transfer the uranium hexafluoride gas in the sampling container to a 740L container (uranium hexafluoride collection container) for collection and storage. After approximately 30 minutes, the uranium hexafluoride in the sampling container will be emptied. Disconnect the sampling container from the purification system branch pipe. Prepare a 5% sodium carbonate solution and a 5% citric acid solution using distilled water. Heat the sodium carbonate solution to 85℃~95℃ in a constant temperature water bath. Heat the distilled water to 85℃~95℃ in a constant temperature water bath. Immerse the sampling container body and the DN6 right-angle shut-off valve and its components in the sodium carbonate solution for 30 minutes. Then immerse the sampling container body in distilled water, drain the soaking solution, and soak for another 30 minutes. Figure 2The sampling container was removed from the distilled water and installed on a steam heating tube. The inside of the container was cleaned with 0.3 MPa steam for 60 minutes. During the steam cleaning process, a 5% citric acid solution was sprayed onto the surface of the container every 10 minutes. Ten containers, along with the DN6 right-angle stop valve and its components, were grouped together and rinsed 2-3 times with distilled water. Samples were taken from the final cleaning solution for analysis to test the content of molybdenum, titanium, iron, calcium, and sodium. Molybdenum and titanium were controlled to be <0.1 μg / mL; iron, calcium, and sodium were controlled to be <20 μg / mL. The Fe, Ca, and Na values ​​were calculated by subtracting the blank value from the distilled water. If the results were not met, the sampling container was cleaned again. The DN6 right-angle stop valve, its components, and the container were then purged and dried with nitrogen. The DN6 right-angle stop valve, its components, and the container were placed in a constant temperature chamber and dried at 85℃-95℃ for 30 minutes. The cleaning of the uranium hexafluoride sampling container was completed.

[0091] The cleaning method for uranium hexafluoride sampling containers in this invention is simple to operate, can improve cleaning efficiency, and reduce labor intensity.

[0092] like Figure 2 and Figure 3 This invention provides a cleaning system for a uranium hexafluoride sampling container, comprising a heating device, a purification device, and a cleaning and drying device, wherein...

[0093] The heating device includes a heating box, an electric heating belt, and a constant temperature box;

[0094] The purification device includes a uranium hexafluoride collection container 1, a purification system branch pipe 2 connected to the uranium hexafluoride collection container, and a sample inversion purification valve 3 and a connector 6 connected to a DN6 right-angle stop valve installed on the purification system branch pipe.

[0095] The cleaning and drying device includes a steam pipe 7, a nitrogen pipe 8, and a heating pipe 9, wherein the steam pipe and the nitrogen pipe are both connected to the heating pipe.

[0096] The uranium hexafluoride sampling container is heated using the heating device according to the preset temperature and preset heating time to obtain the heated sampling container;

[0097] The uranium hexafluoride in the heated sampling container is emptied using the purification device to obtain a purified sampling container.

[0098] According to the preset soaking time, the purified sampling container is soaked in the cleaning and drying device and the prepared soaking solution to obtain the soaked sampling container.

[0099] The sampling container is cleaned and dried using the cleaning and drying device to obtain a usable sampling container.

[0100] The uranium hexafluoride (UF6) collection container is used to collect uranium hexafluoride flowing in from the uranium hexafluoride sampling container 4. In practice, a 740L uranium hexafluoride container can be used for collection. The steam pipe is connected to steam, the nitrogen pipe is connected to nitrogen, and the heating pipe can be either cleaned with steam or dried with nitrogen.

[0101] like Figure 2 The uranium hexafluoride sampling container is installed on the connector at the front end of the inverted purification valve using the DN6 right-angle stop valve 5 and its components.

[0102] In this embodiment, there are no restrictions on the heating box, electric heating belt, and constant temperature chamber, as long as they can achieve the purpose of heating the sampling container. Similarly, there are no restrictions on the electric heating belt, as long as it can be wrapped around the sampling container body and the DN6 right-angle stop valve to achieve electric heating. Finally, there are no restrictions on the constant temperature chamber, as long as it can dry the sampling container body, the DN6 right-angle stop valve, and its components.

[0103] The cleaning method for uranium hexafluoride sampling containers implemented using the cleaning system of the uranium hexafluoride sampling container in this embodiment of the invention has the advantages of simple operation process, low amount of cleaning waste liquid generated, and reduced workload.

[0104] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for cleaning a uranium hexafluoride sampling container, characterized in that, A cleaning system for uranium hexafluoride sampling containers, the cleaning system comprising a heating device, a purification device, and a cleaning and drying device, the method comprising: The uranium hexafluoride sampling container is heated using the heating device according to the preset temperature and preset heating time to obtain the heated sampling container; The uranium hexafluoride in the heated sampling container is emptied using the purification device to obtain a purified sampling container. According to the preset soaking time, the purified sampling container is soaked in the cleaning and drying device and the prepared soaking solution to obtain the soaked sampling container. The sampling container is cleaned and dried using the cleaning and drying device to obtain a usable sampling container; The uranium hexafluoride sampling container is heated using the heating device according to a preset temperature and a preset heating time to obtain a heated sampling container, comprising: The uranium hexafluoride sampling container was placed in a heating chamber at a temperature of 120°C and heated at a constant temperature for 2 hours. The purification device is used to empty the uranium hexafluoride from the heated sampling container to obtain a purified sampling container, comprising: Connect the heated sampling container to the purification device; Wrap an electric heating belt around the heated sampling container; Open the inverted purification valve and the DN6 right-angle stop valve to empty the uranium hexafluoride in the heated sampling container, thus obtaining a purified sampling container. The DN6 right-angle stop valve is connected to the connector at the front end of the inverted purification valve and the heated sampling container. A 100°C electric heating belt is wrapped around the bottle body of the heated sampling container and the DN6 right-angle stop valve. The prepared soaking solution includes: Soak in a 5% sodium carbonate solution prepared with distilled water; The purified sampling container is immersed in the cleaning and drying device and the prepared immersion solution for a preset immersion time to obtain the immersed sampling container, which includes: The sodium carbonate solution is heated to obtain a heated sodium carbonate solution soak. The purified sampling container is immersed in the heated sodium carbonate solution for a preset soaking time to obtain the soaked sampling container. The sampling container is cleaned and dried using the cleaning and drying device to obtain a usable sampling container, including: The soaked sampling container is cleaned using the cleaning and drying device and the prepared citric acid solution to obtain a sampling container after one cleaning; the prepared citric acid solution is a 5% citric acid solution prepared with distilled water. The sampling container after one cleaning is rinsed multiple times with heated distilled water to obtain a rinsed sampling container; multiple sampling containers after one cleaning are grouped together and rinsed 2-3 times with heated distilled water. The rinsed sampling container is dried using the cleaning and drying device to obtain a usable sampling container; the bottle body of the rinsed sampling container is purged and dried using nitrogen gas, and the bottle body is placed in a constant temperature chamber and dried at 85℃~95℃ for 30 minutes. The sampling container is cleaned using the cleaning and drying device and a prepared citric acid solution to obtain a cleaned sampling container, including: The soaked sampling container is installed on the steam heating tube of the cleaning and drying device, and cleaned with steam and a prepared citric acid solution to obtain a sample container after one cleaning. The bottle body of the soaked sampling container is removed from the 5% sodium carbonate solution and installed on the steam heating tube. The inside of the bottle body is cleaned with 0.3MPa steam for 60 minutes. During the steam cleaning process, 5% citric acid solution is sprayed onto the bottle body every 10 minutes. The sampling container, after initial cleaning, is rinsed multiple times with heated distilled water to obtain a rinsed sampling container, comprising: The sampling container after one cleaning is rinsed multiple times using the heated distilled water to obtain a rinsed sampling container. The rinsing solution obtained from the final rinsing was sampled and analyzed to obtain the analytical results. Based on the analysis results, adjust the number of times the sampling container is cleaned after the first cleaning. The adjustment of the number of rinsing cycles for the sampling container after the first cleaning, based on the analysis results, includes: If the analysis results do not meet any of the following conditions: molybdenum and titanium in the rinsing solution are both less than 0.1 μg / mL, and iron, calcium, and sodium in the rinsing solution are all less than 20 μg / mL, then the rinsing should be repeated.

2. The cleaning method for the uranium hexafluoride sampling container according to claim 1, characterized in that, The washing and drying device is used to dry the rinsed sampling container to obtain a usable sampling container, including: The rinsed sampling container is purged and dried using nitrogen gas in the cleaning and drying device to obtain a sample container after one drying process. The sampling container, after being dried once, is placed in the constant temperature chamber of the cleaning and drying device for a second drying to obtain a usable sampling container.

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