A system for collecting and storing radioactive waste liquids

Abstract

The utility model relates to waste liquid recovery device technical field especially, more particularly to a kind of system for collecting and storing radioactive waste liquid, comprising: setting in waste liquid collection interface of fume hood;Setting in negative pressure pump of fume hood;Setting in sampling interface of fume hood;Setting in several groups of waste liquid tank of pit, the waste liquid tank has liquid inlet, liquid outlet and exhaust port, the liquid inlet is communicated at waste liquid collection interface, the liquid outlet is communicated at the sampling interface, several groups the liquid outlet of waste liquid tank is communicated, the negative pressure pump is communicated at the exhaust port, the waste liquid tank is provided with pressure sensor;Communicated in drain pipe's liquid discharge pump, the liquid discharge pump is communicated at the sampling interface and the liquid outlet.The utility model provides a kind of system for collecting and storing radioactive waste liquid, improves the collection storage safety of radioactive waste liquid.

Description

Technical Field

[0001] This utility model relates to the technical field of waste liquid recycling devices, and in particular to a system for collecting and storing radioactive waste liquid. Background Technology

[0002] Radiopharmaceuticals are widely used in various fields, including tumor diagnosis and treatment, heart disease diagnosis, early detection of neurodegenerative diseases, and diagnosis of inflammatory tissues. For example, in tumor diagnosis, like... 18 Radiopharmaceuticals like F-FDG (18F-labeled fluorinated deoxyglucose), after intravenous injection, rapidly circulate throughout the body's blood vessels and accumulate in large quantities at the sites of cancerous cells. These accumulations can be detected using PET-CT scans. 18 F-FDG can detect cancerous cells as "bright spots," helping doctors pinpoint the location of tumors. In treatment, iodine-131 can be used to treat thyroid diseases, utilizing its emitted radiation to destroy diseased thyroid tissue.

[0003] Radioactive waste is inevitably generated during the production of radiopharmaceuticals. Its sources are diverse and its composition complex. During the raw material synthesis stage, the cleaning water from the reactors contains unreacted radionuclides, such as iodine-131 and technetium-99m. During the formulation process, wastewater is also generated during equipment rinsing and product quality inspection. In addition to radioactive substances, this wastewater contains organic solvents (such as ethanol and acetone), acid-base regulators (hydrochloric acid and sodium hydroxide), and organic additives such as proteins and sugars. Different production batches exhibit significant differences in wastewater quality and radioactivity due to variations in product formulation and process adjustments.

[0004] In the production of radiopharmaceuticals, the proper storage and collection of radioactive waste is crucial, affecting not only the normal operation of production but also environmental safety and human health. Radioactive waste is typically treated using decay tanks. These tanks are designed with multiple stages based on the half-life of the radionuclide, utilizing natural decay to reduce radioactivity. After approximately 10 half-lives, samples are taken for testing. Once the radioactive waste concentration meets standards and approval is obtained, it is discharged into industrial wastewater.

[0005] Radiopharmaceuticals are typically produced in multiple batches on an order-based basis. The waste liquid generated during batch production is usually small in volume, but there are many waste liquid generation stages, including synthesis, formulation, packaging, and quality inspection. Current radioisotope production operations require operation in a shielded hot chamber. The waste liquid generated during the process is usually collected in a waste liquid storage tank by a discharge pipe installed at the bottom of the hot chamber.

[0006] However, for radiopharmaceuticals, in addition to meeting radiation protection requirements, the internal environment of the operating hot chamber must meet the requirements of GMP for pharmaceutical production. If conventional waste disposal methods for radiochemistry are used, the drainage pipes in the hot chamber are not easy to sterilize and will become a source of microbial contamination in the pharmaceutical production environment. This method does not meet the requirements for pharmaceutical production. Utility Model Content

[0007] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention provides a system for collecting and storing radioactive waste liquid, thereby improving the safety of collecting and storing radioactive waste liquid.

[0008] This utility model provides a system for collecting and storing radioactive waste liquid, comprising:

[0009] Waste liquid collection interface installed in the fume hood;

[0010] Negative pressure pump installed in fume hood;

[0011] Sampling interface installed in fume hood;

[0012] Several sets of waste liquid tanks are installed in the pit. Each waste liquid tank has an inlet, an outlet and an exhaust port. The inlet is connected to a waste liquid collection interface, the outlet is connected to a sampling interface, the outlets of the several sets of waste liquid tanks are connected, the negative pressure pump is connected to the exhaust port, and the waste liquid tank is equipped with a pressure sensor.

[0013] A drain pump connected to a drainage pipe, the drain pump being connected to the sampling interface and the outlet.

[0014] A further improvement of the system for collecting and storing radioactive waste liquid of this utility model is that a first valve is provided at the waste liquid collection interface, a fourth valve is provided between the first valve and the liquid inlet, and the fourth valves corresponding to several sets of waste liquid tanks are connected.

[0015] A further improvement of the system for collecting and storing radioactive waste liquid of this utility model is that an air extraction valve is provided at the negative pressure pump, a third valve is provided between the air extraction valve and the exhaust port, and the third valves corresponding to several sets of waste liquid tanks are connected.

[0016] A further improvement of the system for collecting and storing radioactive waste liquid of this utility model is that a venting valve is provided at the exhaust port.

[0017] A further improvement of the system for collecting and storing radioactive waste liquid of this utility model is that a second valve is provided at the sampling interface, a drain valve is provided at the outlet, and the drain valves corresponding to several sets of waste liquid tanks are connected in series, with the drain valves connected to the second valve.

[0018] A further improvement of the system for collecting and storing radioactive waste liquid of this utility model is that a central control valve is provided between the second valve and the plurality of drain valves.

[0019] A further improvement of the system for collecting and storing radioactive waste liquid of the present invention is that the first end of the drain pump is connected between the drain valve and the central control valve, the first end of the drain pump is provided with a fifth valve, the second end of the drain pump is connected to a drainage pipe, and the second end of the drain pump is provided with a sixth valve.

[0020] This system, by placing the waste liquid collection interface within the fume hood, allows for "nearby collection" of radioactive waste liquid, shortening the waste liquid transmission path, reducing the risk of leakage during transmission, and improving the convenience and safety of collection. A negative pressure pump connected to the waste liquid tank's exhaust port creates a negative pressure environment within the tank: on one hand, the negative pressure's "suction effect" facilitates the smooth flow of waste liquid from the collection interface into the waste liquid tank's inlet, improving collection efficiency; on the other hand, the negative pressure controls radioactive gases within the tank, preventing their disorderly diffusion into the environment and ensuring air quality and safety in the operating area. The design of multiple waste liquid tanks supports "categorized storage" or "graded decay storage" (different radioactive waste liquids can be stored separately), avoiding interference between waste liquids with different nuclides or levels of contamination, and improving the targeted and flexible nature of storage. The waste liquid tanks are equipped with pressure sensors that monitor the tank pressure in real time; combined with the control of the negative pressure pump, the internal pressure can be precisely controlled to prevent overpressure leading to tank leakage, ensuring storage safety from the source. The design of the waste liquid tank with its inlet connected to the collection interface and its outlet connected to the sampling interface, and with the outlets of multiple tanks interconnected, facilitates unified management and allocation of waste liquid from multiple tanks. At the same time, the sampling interface allows for convenient sampling and testing of the waste liquid, enabling timely monitoring of its radioactivity level, decay progress, and other statuses.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a system for collecting and storing radioactive waste liquid provided by this utility model.

[0024] Figure 2 This is a schematic diagram of a system for collecting and storing radioactive waste liquid provided by this utility model during the collection of radioactive waste liquid.

[0025] Figure 3 This is a schematic diagram of a system for collecting and storing radioactive waste liquid provided by this utility model, showing the sampling of the radioactive waste liquid after a certain period of storage.

[0026] Figure 4 This is a schematic diagram of the discharge of a system for collecting and storing radioactive waste liquid after the radioactive waste liquid has been sampled and tested to meet the standards.

[0027] Figure 5 This is an operational diagram of a system for collecting and storing radioactive waste liquid provided by this utility model when a leak or other malfunction occurs.

[0028] Figure label:

[0029] 1. Fume hood; 11. Waste liquid collection interface; 12. Negative pressure pump; 13. Sampling interface; 14. First valve; 15. Exhaust valve; 16. Second valve; 2. Pit; 21. Waste liquid tank; 22. Third valve; 23. Pressure sensor; 24. Drain valve; 25. Fourth valve; 26. Vent valve; 27. Central control valve; 3. Drain pump; 4. Fifth valve; 5. Sixth valve; 6. Drainage pipe. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The following embodiments are used to illustrate this utility model but should not be used to limit its scope.

[0031] The following is combined with Figure 1This invention describes a system for collecting and storing radioactive waste liquid, comprising: a waste liquid collection interface 11 installed in a fume hood 1; a negative pressure pump 12 installed in the fume hood 1; a sampling interface 13 installed in the fume hood 1; several sets of waste liquid tanks 21 installed in a pit 2, each waste liquid tank 21 having an inlet, an outlet, and an exhaust port, the inlet being connected to the waste liquid collection interface 11, the outlet being connected to the sampling interface 13, the outlets of the several sets of waste liquid tanks 21 being interconnected, the negative pressure pump 12 being connected to the exhaust port, and each waste liquid tank 21 being equipped with a pressure sensor 23; and a drainage pump 3 connected to a drainage pipe 6, the drainage pump 3 being connected to the sampling interface 13 and the outlet.

[0032] In a preferred embodiment of the system for collecting and storing radioactive waste liquid according to this utility model, a first valve 14 is provided at the waste liquid collection interface 11, a fourth valve 25 is provided between the first valve 14 and the liquid inlet, and the fourth valves 25 corresponding to several sets of waste liquid tanks 21 are connected.

[0033] Furthermore, a suction valve 15 is provided at the negative pressure pump 12, and a third valve 22 is provided between the suction valve 15 and the exhaust port, and the third valves 22 corresponding to several sets of waste liquid tanks 21 are connected.

[0034] Furthermore, a vent valve 26 is provided at the exhaust port.

[0035] Furthermore, a second valve 16 is provided at the sampling interface 13, and a drain valve 24 is provided at the liquid outlet. Several sets of drain valves 24 corresponding to the waste liquid tanks 21 are connected to each other, and the drain valves 24 are connected to the second valve 16.

[0036] Furthermore, a central control valve 27 is provided between the second valve 16 and the plurality of the drain valves 24.

[0037] Furthermore, the first end of the drain pump 3 is connected between the drain valve 24 and the central control valve 27, the first end of the drain pump 3 is provided with a fifth valve 4, the second end of the drain pump 3 is connected to the drain pipe 6, and the second end of the drain pump 3 is provided with a sixth valve 5.

[0038] This system, by placing the waste liquid collection interface 11 within the fume hood 1, allows for the "nearby collection" of radioactive waste liquid, shortening the waste liquid transmission path, reducing the risk of leakage during transmission, and improving the convenience and safety of collection. The negative pressure pump 12, connected to the exhaust port of the waste liquid tank 21, creates a negative pressure environment within the tank. On one hand, the negative pressure "suction" helps the waste liquid flow smoothly from the collection interface into the inlet of the waste liquid tank 21, improving collection efficiency. On the other hand, the negative pressure controls the radioactive gas within the tank, preventing its disorderly diffusion into the environment and ensuring air quality and safety in the operating area. The design of multiple waste liquid tanks 21 supports "categorized storage" or "graded decay storage" (different radioactive waste liquids can be stored separately), avoiding interference between waste liquids of different nuclides and different levels of contamination, and improving the targeting and flexibility of storage. The waste liquid tank 21 is equipped with a pressure sensor 23, which can monitor the internal pressure in real time. Combined with the regulation of the negative pressure pump 12, the internal pressure can be precisely controlled to prevent overpressure leading to tank leakage, ensuring storage safety from the source. The design of the waste liquid tank 21, with its inlet connected to the collection interface and its outlet connected to the sampling interface 13, and with the outlets of multiple tanks interconnected, facilitates unified management and allocation of waste liquid from multiple tanks. At the same time, the sampling interface 13 allows for convenient sampling and testing of the waste liquid, enabling timely monitoring of its radioactivity level, decay progress, and other statuses.

[0039] Preferably, the discharge pump 3 connects the sampling interface 13, the outlet, and the drainage pipe 6. After the waste liquid is tested (e.g., its decay meets the standards), it can be efficiently discharged into the drainage pipe 6 through the discharge pump 3, ensuring a smooth and efficient discharge process. The presence of the sampling interface 13 allows for targeted sampling and testing before discharge, ensuring that the waste liquid discharge complies with environmental and safety standards, avoiding the risk of illegal discharge, and guaranteeing the compliance of the entire process.

[0040] Preferably, the waste liquid tank 21 is located in the pit 2, taking advantage of the spatial layout of the pit 2, and at the same time, taking advantage of the "natural protection" of the pit 2 (the radiation shielding effect of the pit concrete walls, pit cover, etc.), further reducing the radiation impact of radioactive waste liquid on the surrounding environment and personnel, and enhancing the overall radiation protection capability of the system.

[0041] like Figure 2 As shown, when collecting radioactive waste liquid, the first valve 14, the fourth valve 25, the third valve 22 and the air extraction valve 15 corresponding to the waste liquid tank 21 to be collected are opened, and the negative pressure pump 12 is started to generate negative pressure in the waste liquid tank 21, transferring the waste liquid into the waste liquid tank 21.

[0042] like Figure 3As shown, when sampling and testing radioactive waste liquid after it has been stored for a certain period of time, the venting valve 26, the drain valve 24, the central control valve 27, and the second valve 16 corresponding to the waste liquid tank 21 to be sampled and tested are opened, the sampling interface 13 is connected to the sampling device, a certain volume of waste liquid is quantitatively extracted, and then transferred to the laboratory for radioactivity concentration testing.

[0043] like Figure 4 As shown, when discharging radioactive waste liquid after sampling and testing to meet the standards, open the vent valve 26, drain valve 24, fifth valve 4 and sixth valve 5 corresponding to the waste liquid tank 21 to be discharged, and turn on the drain pump 3 to discharge the qualified waste liquid in the waste liquid tank 21 into the drainage pipe 6.

[0044] like Figure 5 As shown, in the event of a leak or other malfunction, the waste liquid in the leaking waste liquid tank 21 needs to be transferred to another spare waste liquid tank 21. The vent valve 26 of the leaking waste liquid tank 21 is opened, the drain valve 24 of the spare waste liquid tank 21 and the leaking waste liquid tank 21 is opened, the third valve 22 and the air extraction valve 15 between the spare waste liquid tank 21 and the negative pressure pump 12 are opened, and the negative pressure pump 12 is turned on to transfer the waste liquid from the leaking waste liquid tank 21 to the spare waste liquid tank 21.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A system for collecting and storing radioactive waste liquid, characterized in that, include: Waste liquid collection interface installed in the fume hood; Negative pressure pump installed in fume hood; Sampling interface installed in fume hood; Several sets of waste liquid tanks are installed in the pit. Each waste liquid tank has an inlet, an outlet and an exhaust port. The inlet is connected to a waste liquid collection interface, the outlet is connected to a sampling interface, the outlets of the several sets of waste liquid tanks are connected, the negative pressure pump is connected to the exhaust port, and the waste liquid tank is equipped with a pressure sensor. A drain pump connected to a drainage pipe, the drain pump being connected to the sampling interface and the outlet.

2. A system for collecting and storing radioactive waste liquid according to claim 1, characterized in that, A first valve is provided at the waste liquid collection interface, and a fourth valve is provided between the first valve and the liquid inlet. Several sets of fourth valves corresponding to the waste liquid tanks are connected to each other.

3. A system for collecting and storing radioactive waste liquid according to claim 1, characterized in that, A suction valve is provided at the negative pressure pump, and a third valve is provided between the suction valve and the exhaust port. Several sets of third valves corresponding to the waste liquid tanks are connected together.

4. A system for collecting and storing radioactive waste liquid according to claim 1, characterized in that, An air release valve is provided at the exhaust port.

5. A system for collecting and storing radioactive waste liquid according to claim 1, characterized in that, A second valve is provided at the sampling interface, and a drain valve is provided at the outlet. Several sets of drain valves corresponding to the waste liquid tanks are connected to each other, and the drain valves are connected to the second valve.

6. A system for collecting and storing radioactive waste liquid according to claim 5, characterized in that, A central control valve is provided between the second valve and several of the drain valves.

7. A system for collecting and storing radioactive waste liquid according to claim 6, characterized in that, The first end of the drain pump is connected between the drain valve and the central control valve. The first end of the drain pump is equipped with a fifth valve. The second end of the drain pump is connected to the drain pipe. The second end of the drain pump is equipped with a sixth valve.

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