Device for removing radioactive deposits in nuclear power station pipeline

Abstract

The utility model discloses a device for removing radioactive deposits in a nuclear power station pipeline. The device comprises a static closed room, a high-pressure flushing mechanism and a waste treatment mechanism. According to the device for removing the radioactive deposits in the nuclear power station pipeline, the static closed room is arranged, so that radioactive water and water mist flowing out from the opening of the pipeline are prevented from diffusing into the external environment, and the situation that radioactive substances are diffused into the external environment and hurt a human body is avoided; meanwhile, a high-pressure flushing mechanism is arranged to clean radioactive deposits in the pipeline, a nozzle of a spray head is arranged towards the water conveying pipeline, and the spray head can move towards the spray head towards the water conveying pipeline in the pipeline through the counter-acting force of high-pressure water; the device for removing the radioactive deposits in the nuclear power plant pipeline solves the problem of high environmental dose caused by the radioactive deposits in the nuclear power plant pipeline, and reduces the radioactive environmental dose of the nuclear power plant, thereby reducing the radiation exposure dose of field staff and facilitating the control of the radioactive dose of the nuclear power plant.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of nuclear power plant deposit processing, especially to a nuclear power plant pipeline internal radioactive deposit removal device. BACKGROUND

[0002] During the operation of the nuclear power plant, the deposition of radioactive products in the pipeline and the activation of the oxide on the inner wall of the pipeline cause the surface radioactivity of the pipeline to increase. This radioactive deposit in the pipeline is caused by the activation of the medium or the oxide in the pipeline during normal operation of the system. It cannot be removed by medium flushing under normal system operating conditions, and can only be shielded by lead wrapping on the outer wall of the pipeline, but the shielding effect is limited. Alternatively, the pipeline with hot spots is cut and replaced, which has a greater impact on the system and is more expensive. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a nuclear power plant pipeline internal radioactive deposit removal device.

[0004] The utility model adopts the technical scheme that a nuclear power plant pipeline internal radioactive deposit removal device is constructed to remove radioactive deposits in the nuclear power plant pipeline to be cleaned. The nuclear power plant pipeline to be cleaned is provided with an opening. The nuclear power plant pipeline internal radioactive deposit removal device comprises a static closed room, a high-pressure flushing mechanism and a waste treatment mechanism.

[0005] The high-pressure flushing mechanism comprises a water storage container, a water delivery pipeline and a spray head. The two ends of the water delivery pipeline are connected to the water storage container and the spray head respectively. The spray head is used to extend into the nuclear power plant pipeline to be cleaned through the opening to clean the radioactive deposits. The nozzle of the spray head is arranged towards the water delivery pipeline.

[0006] The static closed room is used to prevent radioactive water and water mist flowing out of the opening from diffusing into the external environment when the spray head cleans the radioactive deposits in the nuclear power plant pipeline to be cleaned.

[0007] The waste treatment mechanism is used to collect the waste flushed out by the high-pressure flushing mechanism.

[0008] In some embodiments, the static closed room is connected with a filtering exhaust fan, which is used to form a negative pressure environment in the static closed room.

[0009] In some embodiments, a high-pressure pump is arranged on the water delivery pipeline.

[0010] In some embodiments, a water delivery control switch is arranged on the water delivery pipeline.

[0011] In some embodiments, the nuclear power plant pipeline radioactive deposit removal device further comprises a partition, which is arranged on the side of the nuclear power plant pipeline that does not need to be flushed.

[0012] In some embodiments, the partition is an inflatable partition.

[0013] In some embodiments, the high-pressure flushing mechanism further comprises a non-dropping net, which is connected to the water delivery pipeline near the side of the nozzle, and the non-dropping net cover is arranged outside the nozzle.

[0014] In some embodiments, the waste treatment mechanism comprises a waste collection pipeline and a waste collector.

[0015] One end of the waste collection pipeline is located in the pipeline, and the other end of the waste collection pipeline is connected to the waste collector.

[0016] In some embodiments, a waste collection pump is arranged on the waste collection pipeline.

[0017] In some embodiments, the water delivery pipeline and the waste collection pipeline are both connected hoses.

[0018] The nuclear power plant pipeline radioactive deposit removal device has the following beneficial effects: the static closed room is arranged to prevent the radioactive water and water mist flowing out of the pipeline opening from spreading to the external environment, thereby avoiding the radioactive substances from being emitted to the external environment to cause harm to the human body. The high-pressure flushing mechanism is arranged to clean the radioactive deposits in the pipeline, and the nozzle of the nozzle is arranged towards the water delivery pipeline. The nozzle in the pipeline can be moved towards the water delivery pipeline by the high-pressure water reaction force, that is, the high-pressure water is used to flush the inside of the pipeline to remove the radioactive deposits on the inner wall of the pipeline. The water delivery pipeline can be used to pull the nozzle, thereby improving the convenience of the flushing operation. The waste treatment mechanism is arranged to treat the waste flushed out by the high-pressure flushing mechanism. The nuclear power plant pipeline radioactive deposit removal device solves the problem of high environmental dose caused by the radioactive deposits in the pipeline of the nuclear power plant, reduces the radioactive environmental dose of the nuclear power plant, thereby reducing the radiation exposure dose of the on-site workers, and is beneficial to the radioactive dose control of the nuclear power plant. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the present application, the following will further illustrate the present application with reference to the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0020] Figure 1 is the overall structure schematic diagram of the nuclear power plant pipeline internal radioactive deposit removal device in some embodiments of the utility model. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, objects and effects of the utility model, the specific implementation manners of the utility model will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical solutions, and do not indicate that the devices or elements indicated must have a particular direction, so it cannot be understood as a limitation on the utility model.

[0022] It should be further pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there can be one or more intermediate elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features with "first", "second", "third" and the like can explicitly or implicitly include one or more of the features. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0023] Please refer to Figure 1The utility model discloses a nuclear power station pipeline internal radioactive deposit removal device for removing the radioactive deposit in the nuclear power station pipeline to be cleaned, which can include static closed room 1, high pressure flushing mechanism 2 and waste treatment mechanism 3. High pressure flushing mechanism 2 includes water storage container 21, water delivery pipeline 22 and spray head 23, both ends of water delivery pipeline 22 are connected to water storage container 21 and spray head 23 respectively, spray head 23 is used to clean the radioactive deposit by extending into the nuclear power station pipeline to be cleaned through the opening, and the nozzle of spray head 23 is arranged towards water delivery pipeline 22; static closed room 1 is used to prevent the radioactive water and water mist flowing out of the opening from spreading into the external environment when spray head 23 cleans the radioactive deposit in the nuclear power station pipeline to be cleaned; waste treatment mechanism 3 is used to collect the waste flushed out by high pressure flushing mechanism 2.

[0024] Specifically, since the wastewater containing radioactive substances is extremely harmful to human health, production and life, in the embodiment, static closed room 1 is adopted to prevent the radioactive water and water mist flowing out of the opening of the pipeline from spreading into the external environment. The outer wall of the static closed room 1 can be made of lead material, and lead shielding is to reduce the influence of rays on the human body or objects by using the characteristics of high density and strong absorption of rays of lead. The use of lead material as the outer wall of the static closed room 1 can prevent the rays generated by the radioactive deposit during the flushing process from being emitted to the external environment and causing adverse effects on the human body. The static closed room 1 is specifically arranged at the opening position of the pipeline to prevent the radioactive water and water mist from spreading into the external environment. The water storage container 21 is used to provide water source for the spray head 23, and the spray head 23 can be a high-pressure water spray head. When the spray head 23 flushes in the pipeline, since the nozzle of the spray head 23 is arranged towards the water delivery pipeline 22, the high-pressure water reaction force can be used to pull the spray head 23 and part of the water delivery pipeline 22 located in the pipeline to move in the pipeline towards the water delivery pipeline 22 towards the spray head 23, that is, the nozzle of the spray head 23 sprays water from left to right. Figure 1 In the embodiment, the reverse jet high-pressure water decontamination technology is used in the nuclear power station pipeline internal radioactive deposit removal device, high-pressure water is used to impact and remove the radioactive deposit and attachments inside the pipeline, and the radioactive wastewater after flushing is flushed to the collection port by liquid flow to avoid the radioactive wastewater from spreading to the outside of the working area during the flushing process. In addition, the waste treatment mechanism 3 can collect the waste flushed out, which can be discharged to the nuclear power plant radioactive wastewater treatment system for treatment subsequently.

[0025] Understandably, the nuclear power plant pipeline radioactive deposit removal device utilizes the arrangement of the static closed chamber 1 to prevent radioactive water and water mist flowing out of the pipeline opening from spreading to the external environment, thereby avoiding the spread of radioactive substances to the external environment and causing harm to the human body. Meanwhile, the high-pressure flushing mechanism 2 is arranged to clean the radioactive deposits in the pipeline, and the nozzle of the spray head 23 is arranged towards the water delivery pipeline 22. The spray head 23 can be moved in the pipeline towards the water delivery pipeline 22 by the high-pressure water reaction force, that is, the high-pressure water is sprayed in the opposite direction to flush the inside of the pipeline and remove the radioactive deposits on the inner wall of the pipeline. The water delivery pipeline 22 can be used to pull the spray head 23, thereby improving the convenience of the flushing operation. Meanwhile, the waste treatment mechanism 3 is arranged to treat the waste flushed out by the high-pressure flushing mechanism 2. The nuclear power plant pipeline radioactive deposit removal device solves the problem of high environmental dose caused by radioactive deposits in the pipeline of the nuclear power plant, reduces the radioactive environmental dose of the nuclear power plant, thereby reducing the radiation exposure dose of the on-site workers and facilitating the control of the radioactive dose of the nuclear power plant.

[0026] In some embodiments, the static closed chamber 1 is connected with a filtering exhaust fan 11, which can form a negative pressure environment in the static closed chamber 1 and filter and discharge the air in the static closed chamber 1. The filtering exhaust fan 11 can be a high-efficiency filtering exhaust fan. The air sucked in can pass through a filtering section, and the harmful substances such as dust and particulate matter are filtered out by the filter. The air passing through the filtering section is continuously blown out by the fan and discharged through the air outlet, thereby achieving the purpose of purifying the air.

[0027] The water delivery pipeline 22 is provided with a high-pressure pump 26 for providing power for the water delivery from the water storage container 21 to the spray head 23. The water delivery pipeline 22 is also provided with a water delivery control switch 24 for controlling the on-off of the water delivery from the water storage container 21 to the spray head 23. The water delivery control switch 24 can be a water delivery control electromagnetic valve or a water delivery control manual valve.

[0028] Further, the nuclear power plant pipeline radioactive deposit removal device also includes a partition 4 arranged on the side of the pipeline of the nuclear power plant that does not need to be flushed. The partition 4 is specifically installed on the side of the pipeline that does not need to be flushed, specifically the other side of the pipeline opposite to the side provided with the spray head 23. The partition 4 is used to isolate the side of the pipeline that does not need to be flushed, thereby preventing the radioactive waste water flushed out from entering the other section of the pipeline and causing pollution expansion. The partition 4 can be a partition inflatable air bag. The partition inflatable air bag is inflated to block the side of the pipeline that needs to be flushed, thereby ensuring the sealing between the partition inflatable air bag and the pipeline.

[0029] The high-pressure flushing mechanism 2 further comprises a fall-preventing net 25 connected to the water delivery pipeline 22 at a side close to the spray head 23, and the fall-preventing net 25 covers the outside of the spray head 23. Understandably, the spray head 23 and the water delivery pipeline 22 are connected by threads or quick connectors, and there is a risk of falling and causing foreign matter, so the fall-preventing net 25 is arranged at the side of the water delivery pipeline 22 close to the spray head 23, when the spray head 23 and the water delivery pipeline 22 are disconnected due to defects, water is sprayed from the gap of the fall-preventing net 25, and the spray head 23 is blocked by the fall-preventing net 25 and stays in the fall-preventing net 25, so that no foreign matter is formed in the pipeline.

[0030] The waste treatment mechanism 3 comprises a waste collection pipeline 31 and a waste collector 32, one end of the waste collection pipeline 31 is located in the pipeline, the other end of the waste collection pipeline 31 is connected to the waste collector 32, and a waste collection pump 33 is arranged on the waste collection pipeline 31. The waste collection pump 33 can be a diaphragm pump, which mainly functions to change the flow of fluid by power operation, receives a control signal output by a control unit, and operates by means of a power source such as air, an electric device or a liquid medium, so as to change the flow of fluid, and the working principle is that compressed air enters a gas distribution valve to push the diaphragm in the cavity to move, so that the medium is continuously sucked from the inlet and discharged from the outlet. Specifically, in the flushing process, the waste flushed out is collected and pumped into the waste collector 32 by the diaphragm pump, and then discharged to a radioactive waste water treatment system of the nuclear power plant for treatment.

[0031] In addition, the water delivery pipeline 22 and the waste collection pipeline 31 are both connecting hoses, which can be made of plastic materials, and the plastic materials can be PVC materials, which have good acid resistance, alkali resistance, corrosion resistance, high strength and durability.

[0032] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application; it should be pointed out that for ordinary skilled persons in the art, the above technical features can be freely combined without departing from the concept of the present application, and some modifications and improvements can be made, which all belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A nuclear power plant in-pipe radioactive deposit removal device for removing radioactive deposits within a nuclear power plant pipe to be cleaned, the nuclear power plant pipe to be cleaned being provided with an opening, characterized by, The nuclear power plant pipeline radioactive deposit removal device comprises a static closed room (1), a high-pressure flushing mechanism (2) and a waste treatment mechanism (3). The high-pressure flushing mechanism (2) comprises a water storage container (21) and a water delivery pipeline (22), and a spray head (23), two ends of the water delivery pipeline (22) are connected to the water storage container (21) and the spray head (23) respectively, the spray head (23) is used for cleaning radioactive deposits in the nuclear power plant pipeline to be cleaned through the opening, and a nozzle of the spray head (23) is arranged towards the water delivery pipeline (22). The static closed room (1) is used for preventing radioactive water and water mist flowing out of the opening from spreading to the external environment when the spray head (23) cleans the radioactive deposits in the nuclear power plant pipeline to be cleaned. The waste treatment mechanism (3) is used for collecting waste flushed out by the high-pressure flushing mechanism (2).

2. The nuclear power plant in-pipe radioactive deposit removal device of claim 1, wherein, The static closed room (1) is connected with a filtering exhaust fan (11), and the filtering exhaust fan (11) is used for forming a negative pressure environment in the static closed room (1).

3. The nuclear power plant in-pipe radioactive deposit removal device of claim 1, wherein, The water delivery pipeline (22) is provided with a high-pressure pump (26).

4. The nuclear power plant in-pipe radioactive deposit removal apparatus of claim 3, wherein, The water delivery pipeline (22) is provided with a water delivery control switch (24).

5. The nuclear power plant in-pipe radioactive deposit removal device of claim 1, wherein, The nuclear power plant pipeline radioactive deposit removal device further comprises a partition (4), and the partition (4) is arranged on a side of the nuclear power plant pipeline to be cleaned which does not need to be flushed.

6. The nuclear power plant in-pipe radioactive deposit removal apparatus of claim 5, wherein, The partition (4) is a partition inflatable air bag.

7. The nuclear power plant in-pipe radioactive deposit removal apparatus of claim 1, wherein, The high-pressure flushing mechanism (2) further comprises an anti-dropping net (25), the anti-dropping net (25) is connected to a side of the water delivery pipeline (22) close to the spray head (23), and the anti-dropping net (25) covers an outer side of the spray head (23).

8. The nuclear power plant in-pipe radioactive deposit removal apparatus of claim 1, wherein, The waste treatment mechanism (3) comprises a waste collection pipeline (31) and a waste collector (32). One end of the waste collection pipeline (31) is located in the pipeline, and the other end of the waste collection pipeline (31) is connected to the waste collector (32).

9. The nuclear power plant in-pipe radioactive deposit removal apparatus of claim 8, wherein, The waste collection pipeline (31) is provided with a waste collection pump (33).

10. The nuclear power plant in-pipe radioactive deposit removal apparatus of claim 8, wherein, The water delivery pipeline (22) and the waste collection pipeline (31) are both connecting hoses.

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