Online decontamination device for nuclear power pipeline

Abstract

The utility model discloses an on-line decontamination device for a nuclear power pipeline, which comprises a first circulating pipeline connected with a water inlet of a pipeline to be decontaminated, a second circulating pipeline connected with a water outlet of the pipeline to be decontaminated and a plurality of liquid storage tanks for storing decontaminants, and each liquid storage tank is provided with a liquid inlet and a liquid outlet; the first circulating pipeline is connected with the liquid outlet, and a circulating pump and a flow meter are arranged on the first circulating pipeline; the second circulating pipeline is connected with the liquid inlet, and an electromagnetic valve and an anti-radiation filter are arranged on the second circulating pipeline; in a cleaning state, the circulating pump, the electromagnetic valve, the anti-radiation filter and the flow meter are started, and a decontaminant in the liquid storage tank enters the to-be-decontaminated pipeline from the liquid outlet, the circulating pump, the flow meter and the first circulating pipeline, flows out of the to-be-decontaminated pipeline and then returns to the liquid storage tank through the second circulating pipeline, the anti-radiation filter, the electromagnetic valve and the liquid inlet. The pipeline cleaning device can clean and decontaminate a to-be-decontaminated pipeline and filter a backflow contaminant, and the flow is controlled through the flow meter in the cleaning process.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline cleaning, in particular to a device for online decontamination of nuclear power pipelines. Background Art

[0002] During the operation and maintenance of nuclear power plants, radioactive activation products will be deposited in the system and pipeline relief areas (such as sampling pipelines, heat exchangers, valve elbows, radioactive monitoring instruments, etc.). The deposited activated corrosion products are the main cause of the collective dose of nuclear power plants and will interfere with radioactive monitoring instruments. The radioactive level of the primary circuit cannot be truly reflected, and even false alarms or exceeding the warning value may occur.

[0003] Therefore, during the shutdown and overhaul of nuclear power plants, it is necessary to decontaminate equipment and pipelines, remove metal oxides deposited on the surface through mechanical, chemical, ultrasonic and other methods, reduce the level of radioactive contamination, reduce the dose received by operation and maintenance personnel, and ensure the accuracy of monitoring data of radioactive monitoring instruments. Commonly used equipment decontamination devices are mostly offline decontamination devices, which require the equipment to be disassembled before decontamination operations, but nuclear power pipelines are often difficult to disassemble, so they need to be decontaminated online. However, there is currently a lack of effective decontamination cleaning devices. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a device for online decontamination of nuclear power pipelines.

[0005] The utility model solves the technical problem by adopting the following technical solution: a device for online decontamination of nuclear power pipelines, comprising a first circulation pipeline connected to a water inlet of the pipeline to be decontaminated, a second circulation pipeline connected to a water outlet of the pipeline to be decontaminated, and a plurality of liquid storage tanks for storing decontaminants, wherein the liquid storage tanks are provided with a liquid inlet and a liquid outlet; the first circulation pipeline is connected to the liquid outlet, and a circulation pump and a flow meter are provided on the first circulation pipeline; the second circulation pipeline is connected to the liquid inlet, and a solenoid valve and a radiation-proof filter are provided on the second circulation pipeline;

[0006] In the cleaning state, the circulation pump, the solenoid valve, the radiation protection filter and the flow meter are turned on, and the detergent in the liquid storage tank enters the pipeline to be decontaminated from the liquid outlet, the circulation pump, the flow meter and the first circulation pipeline, and then returns to the liquid storage tank through the second circulation pipeline, the radiation protection filter, the solenoid valve and the liquid inlet after coming out of the pipeline to be decontaminated.

[0007] In some embodiments, the liquid storage tank includes an oxidation tank and / or a reduction tank, the liquid inlet includes a first liquid inlet and a second liquid inlet, the liquid outlet includes a first liquid outlet and a second liquid outlet, the solenoid valve includes a first solenoid valve and a second solenoid valve, the first liquid inlet is arranged at the upper part of the oxidation tank, and the first liquid outlet is arranged at the bottom of the oxidation tank; the second liquid inlet is arranged at the upper part of the reduction tank, and the second liquid outlet is arranged at the bottom of the reduction tank;

[0008] The first circulation pipeline is connected to the first liquid outlet and / or the second liquid outlet, and the first liquid outlet, the second liquid outlet and the flow meter are respectively arranged in parallel in pairs;

[0009] The second circulation pipeline is connected to the first solenoid valve and / or the second solenoid valve, and is connected to the first liquid inlet and / or the second liquid inlet, and the first solenoid valve and the second solenoid valve are arranged in parallel.

[0010] In some embodiments, a first valve is provided between the first circulation pipeline and the first liquid outlet, and a second valve is provided between the second circulation pipeline and the second liquid outlet;

[0011] The first valve and the second valve are respectively solenoid valves or manual valves.

[0012] In some embodiments, the top of the oxidation tank is further provided with a first opening for injecting an oxidant, and the first opening can be opened and closed by a first tank cover;

[0013] The top of the reduction tank is also provided with a second opening for injecting a reducing agent, and the second opening can be opened and closed and covered by a second tank cover.

[0014] In some embodiments, the apparatus for online decontamination of nuclear power pipelines further includes a heater installed in the liquid storage tank.

[0015] In some embodiments, the apparatus for online decontamination of nuclear power pipelines further comprises a water level monitor, which is installed in the liquid storage tank.

[0016] In some embodiments, the second circulation pipeline further includes a drain valve and a drain port, and the drain valve is connected to the drain port;

[0017] The drain valve is a solenoid valve or a manual valve.

[0018] In some embodiments, the device for online decontamination of nuclear power pipelines also includes a mounting shell for mounting pipe components, the mounting shell being provided with a third opening for extending the first circulation pipeline, a fourth opening for extending the second circulation pipeline, and a fifth opening for extending the sewage outlet.

[0019] In some embodiments, the apparatus for online decontamination of nuclear power pipelines further includes a moving component connected to the bottom of the mounting shell.

[0020] In some embodiments, the device for online decontamination of nuclear power pipelines further includes a hydrophobic base tray, which is installed at the bottom of the installation shell.

[0021] By implementing the utility model, the following beneficial effects are achieved:

[0022] The utility model is a device for online decontamination of nuclear power pipelines, comprising a first circulation pipeline connected to the water inlet of the pipeline to be decontaminated, a second circulation pipeline connected to the water outlet of the pipeline to be decontaminated, and a plurality of liquid storage tanks for storing decontaminants, wherein the liquid storage tank is provided with a liquid inlet and a liquid outlet; the first circulation pipeline is connected to the liquid outlet, and a circulation pump and a flow meter are provided on the first circulation pipeline; the second circulation pipeline is connected to the liquid inlet, and a solenoid valve and a radiation-proof filter are provided on the second circulation pipeline; in the cleaning state, the circulation pump, the solenoid valve, the radiation-proof filter and the flow meter are turned on, and the decontaminant in the liquid storage tank enters the pipeline to be decontaminated from the liquid outlet, the circulation pump, the flow meter and the first circulation pipeline, and returns to the liquid storage tank after coming out of the pipeline to be decontaminated through the second circulation pipeline, the radiation-proof filter, the solenoid valve and the liquid inlet. The utility model can clean and decontaminate the pipeline to be decontaminated, and filter the refluxed contaminant, and control the flow rate through the flow meter during the cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0024] Figure 1 It is a structural schematic diagram of a device for online decontamination of nuclear power pipelines according to one embodiment of the utility model;

[0025] Figure 2 yes Figure 1 A top view of a device for online decontamination of nuclear power pipelines; wherein the first slot cover is hidden. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] See also Figure 1 One embodiment of the utility model discloses a device for online decontamination of nuclear power pipelines, comprising a first circulation pipeline 1 connected to the water inlet of the pipeline to be decontaminated, a second circulation pipeline 4 connected to the water outlet of the pipeline to be decontaminated, and a plurality of liquid storage tanks for storing decontaminants, wherein the liquid storage tanks are provided with a liquid inlet and a liquid outlet. The first circulation pipeline 1 is connected to the liquid outlet, and a circulation pump 2 and a flowmeter 3 are provided on the first circulation pipeline 1. The second circulation pipeline 4 is connected to the liquid inlet, and a solenoid valve and a radiation-proof filter 9 are provided on the second circulation pipeline 4. It can be understood that a first pipe opening 11 is provided on the first circulation pipeline 1, which is connected to the water inlet of the pipeline to be decontaminated. A second pipe opening 41 is provided on the second circulation pipeline 4, which is connected to the water outlet of the pipeline to be decontaminated.

[0031] In the cleaning state, the circulation pump 2, the electromagnetic valve, the radiation protection filter 9 and the flow meter 3 are turned on, and the detergent in the liquid storage tank enters the pipeline to be cleaned from the liquid outlet, the circulation pump 2, the flow meter 3, and the first circulation pipeline 1, and then returns to the liquid storage tank through the second circulation pipeline 4, the radiation protection filter 9, the electromagnetic valve, and the liquid inlet after exiting the pipeline to be cleaned. It can be understood that after the cleaning is completed, the circulation pump 2, the electromagnetic valve, the radiation protection filter 9 and the flow meter 3 need to be turned off.

[0032] In some embodiments, the liquid storage tank includes an oxidation tank 5 and / or a reduction tank 6, the oxidation tank 5 is used to store an oxidant, and the reduction tank 6 is used to store a reducing agent. The liquid inlet includes a first liquid inlet 51 and a second liquid inlet 61, the liquid outlet includes a first liquid outlet 52 and a second liquid outlet 62, and the solenoid valve includes a first solenoid valve 7 and a second solenoid valve 8. The first liquid inlet 51 is arranged at the upper part of the oxidation tank 5 for refluxing the used oxidant, and the first liquid outlet 52 is arranged at the bottom of the oxidation tank 5 for outputting the oxidant. The second liquid inlet 61 is arranged at the upper part of the reduction tank 6 for refluxing the used reducing agent, and the second liquid outlet 62 is arranged at the bottom of the reduction tank 6 for outputting the reducing agent. The first circulation pipeline 1 is connected to the first liquid outlet 52 and / or the second liquid outlet 62, and the first liquid outlet 52, the second liquid outlet 62 and the flowmeter 3 are respectively arranged in parallel in pairs. The second circulation pipeline 4 is connected to the first solenoid valve 7 and / or the second solenoid valve 8 and is connected to the first liquid inlet 51 and / or the second liquid inlet 61 , and the first solenoid valve 7 and the second solenoid valve 8 are arranged in parallel.

[0033] Preferably, in this embodiment, the liquid storage tank includes an oxidation tank 5 and a reduction tank 6, the first circulation pipeline 1 is connected to the first liquid outlet 52 and the second liquid outlet 62 respectively, the second circulation pipeline 4 is connected to the first solenoid valve 7 and the second solenoid valve 8 respectively, and is connected to the first liquid inlet 51 and the second liquid inlet 61. The oxidation tank 5, the first liquid outlet 52, the first circulation pipeline 1, the second circulation pipeline 4, the first solenoid valve 7 and the first liquid inlet 51 are an independent circulation pipeline. The reduction tank 6, the second liquid outlet 62, the first circulation pipeline 1, the second circulation pipeline 4, the second solenoid valve 8 and the second liquid inlet 61 are another independent circulation pipeline, and the two independent circulation pipelines operate independently and do not affect each other. Among them, the first circulation pipeline 1 and the second circulation pipeline 4 are shared pipelines.

[0034] In some embodiments, a first valve is provided between the first circulation pipeline 1 and the first liquid outlet 52, and a second valve is provided between the second circulation pipeline 4 and the second liquid outlet 62. The first valve and the second valve are solenoid valves or manual valves, respectively. The first valve is used to control the on-off of the oxidant in the oxidation tank 5, and the second valve is used to control the on-off of the reductant in the reduction tank 6. The first valve and the second valve are not shown in the figure.

[0035] In some embodiments, see Figure 2 The top of the oxidation tank 5 is also provided with a first opening 53 for injecting an oxidant, and the first opening 53 can be opened and closed by a first tank cover. The top of the reduction tank 6 is also provided with a second opening for injecting a reducing agent, and the second opening can be opened and closed by a second tank cover 63. By opening the first tank cover, an oxidant can be injected into the oxidation tank 5 from the first opening 53. By opening the second tank cover 63, a reducing agent can be injected into the reduction tank 6 from the second opening. The first tank cover and the second opening are not shown in the figure.

[0036] In some embodiments, the device for online decontamination of nuclear power pipelines further comprises a heater 10, which is installed in the liquid storage tank. Preferably, the heater 10 is a heating tube, and at least one heater 10 is respectively provided in the oxidation tank 5 and the reduction tank 6 for heating the oxidant and the reductant.

[0037] In some embodiments, the device for online decontamination of nuclear power pipelines further comprises a water level monitor 101, which is installed in the liquid storage tank. Preferably, at least one water level monitor 101 is respectively provided in the oxidation tank 5 and the reduction tank 6, for real-time monitoring of the liquid levels of the oxidant and the reductant, to avoid the heater 10 running idle due to too low liquid level, thus damaging the equipment.

[0038] In some embodiments, the second circulation pipeline 4 further includes a drain valve 21 and a drain port 22, the drain valve 21 is connected to the drain port 22, and the drain valve 21 is a solenoid valve or a manual valve. Under normal conditions, the drain valve 21 is in a closed state. After the cleaning of the decontamination pipeline is completed, the drain valve 21 is opened to discharge the pollutant in the oxidation tank 5 or the reduction tank 6 through the drain port 22. Preferably, the drain valve 21 and the drain port 22 are arranged at the outlet of the circulation pump 2.

[0039] In some embodiments, the device for online decontamination of nuclear power pipelines further includes a mounting shell 102 for mounting pipe components, and the mounting shell 102 is provided with a third opening for the first circulation pipeline 1 to extend, a fourth opening for the second circulation pipeline 4 to extend, and a fifth opening for the sewage outlet 22 to extend. Among them, the pipe components such as the oxidation tank 5, the reduction tank 6, the first circulation pipeline 1, the second circulation pipeline 4, the circulation pump 2, etc. are all installed inside the mounting shell 102 to improve the integrity and integration of the equipment. Preferably, the mounting shell 102 is provided with an avoidance groove at a position opposite to the first opening 53 of the oxidation tank 5 and at a position opposite to the second opening of the reduction tank 6 to avoid the movement of the first tank cover and the second tank cover 63.

[0040] In some embodiments, the device for online decontamination of nuclear power pipelines further comprises a mobile assembly 103, which is connected to the bottom of the installation shell 102 to enhance the overall practicality, convenience and accessibility of the device. Preferably, the mobile assembly 103 comprises a plurality of wheels and a brake device.

[0041] In some embodiments, the device for online decontamination of nuclear power pipelines further includes a hydrophobic base plate, which is installed at the bottom of the installation shell 102 to prevent water from escaping. Preferably, the hydrophobic base plate is provided with a hydrophobic slope and a hydrophobic pipeline, which does not accumulate liquid and is easy to decontaminate. The hydrophobic base plate is not shown in the figure.

[0042] It can be understood that in order to improve the corrosion resistance, the installation shell 102, the first circulation pipeline 1, the second circulation pipeline 4, the oxidation tank 5, the reduction tank 6 and the hydrophobic bottom plate are respectively made of stainless steel materials.

[0043] The method for using the device for online decontamination of nuclear power pipelines of the utility model is as follows:

[0044] Step 1: Connect the water inlet of the pipeline to be decontaminated with the first circulation pipeline 1 , and connect the water outlet of the pipeline to be decontaminated with the second circulation pipeline 4 .

[0045] Step 2: Add appropriate oxidants and reductants to the oxidation tank 5 and the reduction tank 6, and connect the power to the heater 10, the first solenoid valve 7, the second solenoid valve 8, the circulation pump 2, the flow meter 3, the water level monitor 101 and other components that need to be powered.

[0046] Step 3: Perform oxidation decontamination cycle: When the oxidant in the oxidation tank 5 reaches an appropriate temperature, open the first valve and the first solenoid valve 7, start the circulation pump 2, and perform oxidation decontamination cycle. The oxidant enters the pipeline to be decontaminated from the first liquid outlet 52, the circulation pump 2, the flow meter 3, and the first circulation pipeline 1, and then returns to the oxidation tank 5 through the second circulation pipeline 4, the radiation protection filter 9, the first solenoid valve 7, and the first liquid inlet 51 after exiting the pipeline to be decontaminated, completing one cycle. Multiple cycles can be performed as needed.

[0047] Step 4: Discharge the contaminated oxidant: After the oxidation decontamination cycle is completed, open the first valve, the drain valve 21 and the circulation pump 2 to discharge the contaminated oxidant, and close the first valve, the drain valve 21 and the circulation pump 2.

[0048] Step 5: Perform reduction and decontamination cycle: When the reducing agent in the reduction tank 6 reaches an appropriate temperature, open the second valve and the second solenoid valve 8, start the circulation pump 2, and perform reduction and decontamination cycle. The reducing agent enters the pipeline to be decontaminated from the second liquid outlet 62, the circulation pump 2, the flow meter 3, and the first circulation pipeline 1, and then returns to the reduction tank 6 through the second circulation pipeline 4, the radiation protection filter 9, the second solenoid valve 8, and the second liquid inlet 61 after exiting the pipeline to be decontaminated, completing one cycle. Multiple cycles can be performed as needed.

[0049] Step 6: Discharge the contaminated reducing agent: After the reduction and decontamination cycle is completed, open the second valve, the drain valve 21 and the circulation pump 2 to discharge the contaminated reducing agent, and close the second valve, the drain valve 21 and the circulation pump 2.

[0050] Step 7: Rinsing and decontamination: Add rinsing liquid (or clean water) into the oxidation tank 5, and perform rinsing operations according to the methods of "Step 3" and "Step 4" above to complete rinsing and decontamination of the decontamination pipeline and complete cleaning and maintenance of the oxidation decontamination circulation pipeline.

[0051] Add the rinsing liquid (or clean water) into the reduction tank 6, and perform the rinsing operation according to the methods of the above-mentioned "step 5" and "step 6", complete the rinsing and decontamination of the decontamination pipeline and complete the cleaning and maintenance of the reduction decontamination circulation pipeline.

[0052] By implementing the utility model, the following beneficial effects are achieved:

[0053] The utility model is used for the on-line decontamination device of nuclear power pipelines, which can clean and decontaminate the pipelines to be decontaminated and filter the refluxed pollutants. The flow rate is controlled by the flow meter 3 during the cleaning process.

[0054] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the utility model; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A device for online decontamination of nuclear power pipelines, characterized in that: The invention comprises a first circulation pipeline (1) connected to the water inlet of the pipeline to be decontaminated, a second circulation pipeline (4) connected to the water outlet of the pipeline to be decontaminated, and a plurality of liquid storage tanks for storing decontaminants, wherein the liquid storage tanks are provided with a liquid inlet and a liquid outlet; the first circulation pipeline (1) is connected to the liquid outlet, and a circulation pump (2) and a flow meter (3) are provided on the first circulation pipeline (1); the second circulation pipeline (4) is connected to the liquid inlet, and a solenoid valve and a radiation protection filter (9) are provided on the second circulation pipeline (4); In the cleaning state, the circulation pump (2), the solenoid valve, the radiation protection filter (9) and the flow meter (3) are turned on, and the detergent in the liquid storage tank enters the pipeline to be decontaminated from the liquid outlet, the circulation pump (2), the flow meter (3) and the first circulation pipeline (1), and then returns to the liquid storage tank after coming out of the pipeline to be decontaminated through the second circulation pipeline (4), the radiation protection filter (9), the solenoid valve and the liquid inlet.

2. The device for online decontamination of nuclear power pipelines according to claim 1, characterized in that: The liquid storage tank comprises an oxidation tank (5) and / or a reduction tank (6), the liquid inlet comprises a first liquid inlet (51) and a second liquid inlet (61), the liquid outlet comprises a first liquid outlet (52) and a second liquid outlet (62), the solenoid valve comprises a first solenoid valve (7) and a second solenoid valve (8), the first liquid inlet (51) is arranged at the upper part of the oxidation tank (5), and the first liquid outlet (52) is arranged at the bottom of the oxidation tank (5); the second liquid inlet (61) is arranged at the upper part of the reduction tank (6), and the second liquid outlet (62) is arranged at the bottom of the reduction tank (6); The first circulation pipeline (1) is connected to the first liquid outlet (52) and / or the second liquid outlet (62), and the first liquid outlet (52), the second liquid outlet (62) and the flow meter (3) are respectively arranged in parallel in pairs; The second circulation pipeline (4) is connected to the first solenoid valve (7) and / or the second solenoid valve (8), and is connected to the first liquid inlet (51) and / or the second liquid inlet (61), and the first solenoid valve (7) and the second solenoid valve (8) are arranged in parallel.

3. The device for online decontamination of nuclear power pipelines according to claim 2, characterized in that: A first valve is provided between the first circulation pipeline (1) and the first liquid outlet (52), and a second valve is provided between the second circulation pipeline (4) and the second liquid outlet (62); The first valve and the second valve are respectively solenoid valves or manual valves.

4. The device for online decontamination of nuclear power pipelines according to claim 2, characterized in that: The top of the oxidation tank (5) is also provided with a first opening (53) for injecting an oxidant, and the first opening (53) can be opened and closed by a first tank cover; The top of the reduction tank (6) is also provided with a second opening for injecting a reducing agent, and the second opening can be opened and closed by a second tank cover (63).

5. The device for online decontamination of nuclear power pipelines according to claim 1, characterized in that: The device for online decontamination of nuclear power pipelines further comprises a heater (10), and the heater (10) is installed in the liquid storage tank.

6. The device for online decontamination of nuclear power pipelines according to claim 1, characterized in that: The device for online decontamination of nuclear power pipelines further comprises a water level monitor (101), and the water level monitor (101) is installed in the liquid storage tank.

7. The device for online decontamination of nuclear power pipelines according to any one of claims 1 to 6, characterized in that: The second circulation pipeline (4) further comprises a sewage discharge valve (21) and a sewage discharge port (22), wherein the sewage discharge valve (21) is connected to the sewage discharge port (22); The sewage discharge valve (21) is a solenoid valve or a manual valve.

8. The device for online decontamination of nuclear power pipelines according to claim 7, characterized in that: The device for online decontamination of nuclear power pipelines also includes a mounting shell (102) for mounting pipe components, wherein the mounting shell (102) is provided with a third opening for the first circulation pipeline (1) to extend, a fourth opening for the second circulation pipeline (4) to extend, and a fifth opening for the sewage outlet (22) to extend.

9. The device for online decontamination of nuclear power pipelines according to claim 8, characterized in that: The device for online decontamination of nuclear power pipelines further comprises a moving component (103), wherein the moving component (103) is connected to the bottom of the installation shell (102).

10. The device for online decontamination of nuclear power pipelines according to claim 8, characterized in that: The device for online decontamination of nuclear power pipelines also includes a hydrophobic bottom plate, which is installed at the bottom of the installation shell (102).

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