A uranium hexafluoride simulation leakage system

Abstract

The present application relates to the field of radiation detection technology, and in particular to a uranium hexafluoride simulation leakage system. The uranium hexafluoride simulation leakage system includes: a feed chamber for transporting gasified uranium hexafluoride to a monitoring chamber through a transmission pipeline; a monitoring chamber provided with a leakage simulation device and a monitoring device; the leakage simulation device is flange-connected to the transmission pipeline for leaking uranium hexafluoride to the monitoring chamber; the monitoring device is used to monitor leakage in the monitoring chamber; and further includes an exhaust gas treatment system, a waste liquid treatment system, and a ventilation system. The uranium hexafluoride simulation leakage system of the present application can safely simulate the leakage of uranium hexafluoride and monitor and obtain leakage-related data.

Description

Technical Field

[0001] The present application relates to the field of radiation detection technology, and in particular to a uranium hexafluoride simulation leakage system. Background Art

[0002] Uranium hexafluoride (UF6) is a key compound in the production of nuclear fuel cycle facilities, making its handling and safe management crucial. At room temperature and pressure, UF6 appears as a white solid powder, but it sublimates into a gas at 56.4°C. Due to its active chemical properties, strong oxidizing properties, toxicity, and volatile nature, a UF6 leak could pose a serious threat to operators and the environment.

[0003] Existing nuclear fuel cycle processing equipment mainly focuses on UF6 feeding, unloading, sampling and exhaust gas treatment, but there are few simulation systems for UF6 leakage. There is a lack of systems that can study the characteristics of uranium hexafluoride leakage and safely obtain relevant data. Summary of the Invention

[0004] In order to address the deficiencies in the prior art, the purpose of this application is to provide a uranium hexafluoride simulation leakage system to facilitate the safe simulation and monitoring of UF6 leakage.

[0005] To achieve the above objectives, the present application provides a uranium hexafluoride simulation leakage system, comprising:

[0006] A feeding chamber, which is used to heat the storage container of uranium hexafluoride material through a heating device, so that the vaporized uranium hexafluoride is transported to the monitoring chamber through a transmission pipeline;

[0007] a monitoring room, wherein the monitoring room is provided with a leakage simulation device and a monitoring device; the leakage simulation device is connected to the transmission pipeline flange and is used to leak uranium hexafluoride into the monitoring room; the monitoring device is used to monitor the leakage in the monitoring room;

[0008] Exhaust gas treatment system, used to treat exhaust gas after simulated leakage in the monitoring room;

[0009] Waste liquid treatment system, used to treat waste liquid generated by the tail gas treatment system for drug preparation and precipitation;

[0010] Waste liquid evaporation system, used to evaporate the waste liquid separated by the waste liquid treatment system into solids and filter press;

[0011] The ventilation and exhaust system is used to form ventilation and exhaust paths from the feeding room to the monitoring room and from the monitoring room to the exhaust gas treatment system, and to discharge the exhaust gas treated by the exhaust gas treatment system using a filter fan.

[0012] Furthermore, the monitoring equipment includes any one or a combination of an HF concentration detector, a flow field detection device, a pressure detection device, a humidity and temperature detection device, and an aerosol particle size monitoring device.

[0013] Furthermore, it also includes:

[0014] The tail gas recovery system is used to recover uranium hexafluoride from the tail gas after simulated leakage in the monitoring room.

[0015] Furthermore, the ventilation and exhaust system is also used to form ventilation and exhaust paths from the feeding room to the monitoring room, from the monitoring room to the exhaust gas recovery system, and from the exhaust gas recovery system to the exhaust gas treatment system.

[0016] Furthermore, it also includes:

[0017] The pipeline heating equipment is used to heat the transmission pipeline to keep the uranium hexafluoride in the transmission pipeline in a gaseous state.

[0018] Furthermore, the exhaust gas treatment system includes:

[0019] The elution tower is used for reacting the tail gas entering the elution tower from the bottom of the elution tower by spraying the elution solution;

[0020] Circulation tank, used for circulating and replenishing the elution solution;

[0021] A heater, used to heat and dehumidify the washed tail gas;

[0022] The filter is used to filter and discharge the exhaust gas after heating and dehumidification and after it passes the test.

[0023] Furthermore, the tail gas recovery system includes a carbon reactor and / or a condensation recovery device, the carbon reactor is used to collect uranium hexafluoride through sodium fluoride, and the condensation recovery device is used to collect uranium hexafluoride through a condenser.

[0024] Furthermore, an HF concentration detector is also provided in the feeding chamber.

[0025] Furthermore, an atomizing nozzle is provided on the top of the monitoring chamber, and the atomizing nozzle is used to spray water mist vertically downward from the top of the monitoring chamber.

[0026] Furthermore, the waste liquid evaporation system includes:

[0027] The three-effect evaporation system is used to evaporate and crystallize the waste liquid separated by the waste liquid treatment system into solid waste;

[0028] The filter press system is used for squeezing and filtering the solid waste.

[0029] The uranium hexafluoride simulation leakage system provided in this application can safely simulate the leakage of uranium hexafluoride, monitor and obtain leakage-related data, and safely and efficiently treat the waste generated after the simulated leakage, providing a reference for preventing the leakage of uranium hexafluoride and post-leakage treatment.

[0030] Other features and advantages of the present application will be set forth in the following description, and in part will be apparent from the description, or may be learned by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0032] Figure 1 This is a schematic structural diagram of the uranium hexafluoride simulation leakage system of this application. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are for illustrative purposes only and are not intended to limit the scope of protection of the present application.

[0034] It should be understood that the various steps described in the method embodiments of the present application can be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0035] As used herein, the term "including" and its variations are open-ended, i.e., "including but not limited to." The term "based on" means "based, at least in part, on." The term "one embodiment" means "at least one embodiment," the term "another embodiment" means "at least one additional embodiment," and the term "some embodiments" means "at least some embodiments." Other terms are defined in the following description.

[0036] It should be noted that the modifications of "one" and "plurality" mentioned in this application are illustrative rather than restrictive. Those skilled in the art will understand that unless the context clearly indicates otherwise, they should be understood as "one or more." "Plurality" should be understood as two or more.

[0037] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0038] Example 1

[0039] One embodiment of the present application provides a uranium hexafluoride simulation leakage system. Figure 1 This is a schematic diagram of the structure of the uranium hexafluoride simulation leakage system of this application, which will be referred to below Figure 1 The uranium hexafluoride simulated leakage system of the present application is described in detail, including:

[0040] A feeding chamber 100 is used to heat a storage container of uranium hexafluoride material through a heating device, so that the vaporized uranium hexafluoride is transported to the monitoring chamber through a transmission pipeline;

[0041] In this embodiment, the feed chamber 100 is a square sealed cabin with a heating device installed inside for heating the storage container of uranium hexafluoride. The solid uranium hexafluoride in the storage container is heated to a gaseous state and then released to the simulated leakage device in the monitoring chamber 200 through pipes, valves, and flow meters.

[0042] It can be understood that the heating device mainly consists of a heating and temperature control system host, a control cabinet, and supporting pipelines, valves, and automatic control instruments.

[0043] It is understandable that a pressure gauge is provided on the transmission pipeline to detect the pressure of the transmission pipeline.

[0044] In this embodiment, when the pressure gauge detects a pressure of 10 to 500 kPa, uranium hexafluoride is leaked into the monitoring chamber 200 through the pressure regulating valve and the flow meter.

[0045] The monitoring room 200 is provided with a leakage simulation device and a monitoring device. The leakage simulation device is connected to the transmission pipeline flange, and the monitoring device is used to monitor the leakage in the monitoring room.

[0046] In this embodiment, the monitoring room 200 is provided with a single door, which is used for material handling, maintenance operations, and entry and exit of corresponding personnel. In order to prevent the possible outflow of liquid condensed by uranium hexafluoride hydrolysis products, the monitoring room 200 is provided with a threshold of a certain height.

[0047] In this embodiment, the main body of the monitoring chamber 200 is made of stainless steel (external surface) and organic glass plate (inner surface), and meets the sealing requirements.

[0048] In this embodiment, a temperature and humidity adjustment device is further provided in the monitoring room 200 to achieve temperature and humidity adjustment under the condition of circulation in the monitoring room.

[0049] In this embodiment, the detection equipment in the monitoring room 200 includes: a HF concentration detector, a flow field detection device, a pressure detection device, a humidity and temperature detection device, and an aerosol particle size monitoring device, which also has the function of measuring parameters after uranium hexafluoride gasification.

[0050] Exemplary ones include particle imaging velocimeter (PIV), high-definition camera and optical particle size spectrometer (OPS).

[0051] In this embodiment, a pipeline heating device is further provided for heating the transmission pipeline to keep the uranium hexafluoride in the transmission pipeline in a gaseous state.

[0052] Generally, pipeline heating equipment controls the temperature of the transmission pipeline at 80℃~93℃.

[0053] In this embodiment, an atomizing nozzle is further provided on the top of the monitoring chamber, and the atomizing nozzle is used to spray water mist vertically downward from the top of the monitoring chamber so that the uranium hexafluoride after the simulated leakage can fully react with the water mist.

[0054] The tail gas treatment system 300 is used to treat the tail gas after the simulated leakage in the monitoring room 200 .

[0055] It is understandable that the exhaust gas after the simulated leakage is generally a mixture gas including a small amount of hydrogen fluoride, uranium hexafluoride and uranyl fluoride.

[0056] In this embodiment, the exhaust gas treatment system 300 includes:

[0057] The elution tower is used for reacting the tail gas entering the elution tower from the bottom of the elution tower by spraying the elution solution;

[0058] In this embodiment, the elution solution is a sodium carbonate solution, which is sprayed from the top of the elution tower to fully react with the tail gas.

[0059] In this embodiment, the efficiency of the exhaust gas treatment by the scrubber is 500 g / h.

[0060] Circulation tank, used for circulating and replenishing the elution solution;

[0061] A heater, used to heat and dehumidify the washed tail gas;

[0062] Since the exhaust gas after elution has a high moisture content and cannot be filtered directly, a heater is set to heat and dehumidify it before passing it into the filter, and the heating temperature is not lower than 100℃.

[0063] The filter is used to filter and discharge the exhaust gas after heating and dehumidification and after it passes the test.

[0064] The waste liquid treatment system 400 is used to treat the waste liquid generated by the tail gas treatment system for drug preparation and precipitation.

[0065] In this embodiment, the waste liquid treatment system 400 realizes the precipitation of waste liquid through a batch reaction sedimentation tank and a drug dispensing system. The batch reaction sedimentation tank is the place where the waste liquid and the reagents configured by the drug dispensing system undergo chemical reactions. The main reagents of the drug dispensing system are polyacrylamide (PAM), polyaluminum chloride (PAC), hydrochloric acid, calcium chloride and sodium carbonate. A drug feeding system and a flow monitoring device are designed for each reagent to accurately configure the concentration of the waste liquid treatment reagent.

[0066] The waste liquid evaporation system 500 is used to evaporate the waste liquid separated by the waste liquid treatment system into solids and filter press;

[0067] include:

[0068] The three-effect evaporation system is used to evaporate and crystallize the waste liquid separated by the waste liquid treatment system into solid waste;

[0069] The filter press system is used to squeeze and filter the solid waste to make the volume of the solid waste smaller.

[0070] The tail gas recovery system 700 is used to recover uranium hexafluoride from the tail gas after the simulated leak in the monitoring chamber 200:

[0071] In this embodiment, uranium hexafluoride is recovered by combining carbon reactor recovery and condensation recovery. The carbon reactor collects uranium hexafluoride in the tail gas by a chemical method. The interior of the carbon reactor is filled with sodium fluoride that can react with uranium hexafluoride, thereby collecting uranium hexafluoride in the tail gas. Condensation recovery uses ethylene glycol aqueous solution as a cooling medium and adopts a jacket cooling method to cool the uranium hexafluoride gas in the mixed gas into a liquid or solid state for further recovery.

[0072] In other embodiments, the tail gas recovery system 700 may also only use carbon reactor recovery or condensation recovery.

[0073] The ventilation and exhaust system 600 is used to form ventilation and exhaust paths from the feeding room to the monitoring room, and from the monitoring room to the exhaust gas treatment system. It is also used to form ventilation and exhaust paths from the feeding room to the monitoring room, from the monitoring room to the exhaust gas recovery system, and from the exhaust gas recovery system to the exhaust gas treatment system, and the exhaust gas treated by the exhaust gas treatment system is discharged using a filter fan.

[0074] It is understandable that when the uranium hexafluoride simulation leakage system is in operation, it will monitor parameters such as the temperature, humidity, hydrogen fluoride concentration of the feeding chamber 100 and the monitoring chamber 200, the container mass (leakage mass), the pressure, temperature and flow of the transmission pipeline; the temperature of the pipeline heating system will be monitored to ensure that the uranium hexafluoride in the transmission pipeline is in a gaseous state; the acidity, solution height and hydrogen fluoride concentration of the leaching solution in the tail gas treatment system 300 will be monitored to ensure the efficiency of the tail gas treatment; the temperature in the tail gas recovery system 700 will be monitored to ensure normal condensation recovery; the acidity and solution height of the solution in the waste liquid treatment system 400 will be monitored to ensure normal waste liquid treatment; the temperature of the waste liquid evaporation system 500 will be monitored; and the pressure, flow, wind speed, hydrogen fluoride concentration and radioactive aerosol concentration of the ventilation and exhaust system will be monitored.

[0075] The working process of the uranium hexafluoride leakage simulation system of the embodiment of the present application is as follows: the heating device is started to 6060-100°C to vaporize the uranium hexafluoride in the storage container in the feeding chamber 100, and the vaporized uranium hexafluoride enters the transmission pipeline. When the pressure gauge of the transmission pipeline detects that the pressure is 10-500kPa, the uranium hexafluoride is leaked to the leakage simulation device in the monitoring chamber 200 through the pressure regulating valve and the flow meter; the leakage situation in the monitoring chamber 200 is monitored and recorded by the monitoring equipment; after the recording is completed, the heating device is stopped and the valve of the uranium hexafluoride transmission pipeline is closed; the atomizing nozzle of the monitoring chamber is started to spray water mist to make the residual uranium hexafluoride in the monitoring chamber 200 Uranium hexafluoride is hydrolyzed, monitored, and recorded. When the HF concentration reaches 0.01 ppm, the exhaust gas treatment system 300's fan is activated to treat the mixed gas in the uranium hexafluoride monitoring chamber 200 before discharge. The waste liquid treatment system 400 processes the waste liquid generated by the exhaust gas treatment system through a precipitator. The waste liquid evaporation system 500 evaporates the waste liquid separated by the waste liquid treatment system into a solid and filters it. Workers wearing protective gear such as masks, gloves, respirators, and acid-resistant shoes enter the monitoring chamber 200 to clean residual uranyl fluoride and trace amounts of hydrogen fluoride aqueous solution (using a peelable gel for decontamination) and monitor the results for the next leak simulation. The generated waste is then disposed of. Solid waste is packaged in plastic bags, sealed, and placed in 200L steel drums for temporary storage in a waste depot. Liquid waste is recycled and periodically converted to airborne waste and solid waste through evaporation and precipitation.

[0076] The above description is only a partial embodiment of the present application and an illustration of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in this application is not limited to the technical solutions formed by the specific combination of the above technical features, but also includes other technical solutions formed by any combination of the above technical features or their equivalents without departing from the above disclosed concepts. For example, the above features can be replaced with (but not limited to) technical features with similar functions disclosed in this application.

[0077] In addition, although adopting specific order to describe each operation, this should not be interpreted as requiring these operations to be performed in the specific order shown or in sequential order. Under certain environment, multitasking and parallel processing may be advantageous. Similarly, although comprising some specific implementation details in the above discussion, these should not be interpreted as limiting the scope of the application. Some features described in the context of separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment also can be implemented in multiple embodiments individually or in the mode of any suitable subcombination.

[0078] Although the subject matter has been described in language specific to structural features and / or methodological logical acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

Claims

1. A uranium hexafluoride simulation leakage system, characterized in that: include: A feeding chamber, which is used to heat the storage container of uranium hexafluoride material through a heating device, so that the vaporized uranium hexafluoride is transported to the monitoring chamber through a transmission pipeline; a monitoring room, wherein the monitoring room is provided with a leakage simulation device and a monitoring device; the leakage simulation device is connected to the transmission pipeline flange and is used to leak uranium hexafluoride into the monitoring room; the monitoring device is used to monitor the leakage in the monitoring room; Exhaust gas treatment system, used to treat exhaust gas after simulated leakage in the monitoring room; Waste liquid treatment system, used to treat waste liquid generated by the tail gas treatment system for drug preparation and precipitation; Waste liquid evaporation system, used to evaporate the waste liquid separated by the waste liquid treatment system into solids and filter press; The ventilation and exhaust system is used to form ventilation and exhaust paths from the feeding room to the monitoring room and from the monitoring room to the exhaust gas treatment system, and to discharge the exhaust gas treated by the exhaust gas treatment system using a filter fan.

2. The uranium hexafluoride simulated leakage system according to claim 1, characterized in that: The monitoring equipment includes any one or a combination of an HF concentration detector, a flow field detection device, a pressure detection device, a humidity and temperature detection device, and an aerosol particle size monitoring device.

3. The uranium hexafluoride simulated leakage system according to claim 1, characterized in that: Also includes: The tail gas recovery system is used to recover uranium hexafluoride from the tail gas after simulated leakage in the monitoring room.

4. The uranium hexafluoride simulated leakage system according to claim 3, characterized in that: The ventilation and exhaust system is also used to form ventilation and exhaust paths from the feeding room to the monitoring room, from the monitoring room to the tail gas recovery system, and from the tail gas recovery system to the tail gas treatment system.

5. The uranium hexafluoride simulated leakage system according to claim 1, characterized in that: Also includes: The pipeline heating equipment is used to heat the transmission pipeline to keep the uranium hexafluoride in the transmission pipeline in a gaseous state.

6. The uranium hexafluoride simulated leakage system according to claim 1, characterized in that: The tail gas treatment system includes: The elution tower is used for reacting the tail gas entering the elution tower from the bottom of the elution tower by spraying the elution solution; Circulation tank, used for circulating and replenishing the elution solution; A heater, used to heat and dehumidify the washed tail gas; The filter is used to filter and discharge the exhaust gas after heating and dehumidification and after it passes the test.

7. The uranium hexafluoride simulated leakage system according to claim 3, characterized in that: The tail gas recovery system includes a carbon reactor and / or a condensation recovery device. The carbon reactor is used to collect uranium hexafluoride through sodium fluoride, and the condensation recovery device is used to collect uranium hexafluoride through a condenser.

8. The uranium hexafluoride simulated leakage system according to claim 1, characterized in that: The feed chamber is also provided with an HF concentration detector.

9. The uranium hexafluoride simulated leakage system according to claim 1, characterized in that: The top of the monitoring chamber is also provided with an atomizing nozzle, and the atomizing nozzle is used for spraying water mist vertically downward from the top of the monitoring chamber.

10. The uranium hexafluoride simulated leakage system according to claim 1, characterized in that: The waste liquid evaporation system comprises: The three-effect evaporation system is used to evaporate and crystallize the waste liquid separated by the waste liquid treatment system into solid waste; The filter press system is used for squeezing and filtering the solid waste.

Images