Pressurized water reactor reaction water pool wall surface decontamination device and use method

Abstract

The invention relates to the technical field of nuclear facility radioactive chemical decontamination, in particular to a pressurized water reactor reaction water pool wall surface decontamination device and a using method, the device comprises a decontamination trolley and a flushing water supplementing system, and the decontamination trolley comprises a wall attaching adsorption assembly, a spray head, an electric rolling brush head and a rolling brush head moving guide rail; the wall-attached adsorption assembly is used for being attached to the wall surface of a reactor pool and fixing the decontamination trolley; the nozzle is arranged at the bottom of the decontamination trolley and at the front part of the electric rolling brush head, and the port position is aligned with the wall surface of the reactor pool; the electric rolling brush head is arranged on the rolling brush head moving guide rail and used for moving in the direction of the rolling brush head moving guide rail. The rolling brush head moving guide rail is arranged at the bottom of the decontamination trolley; the flushing water replenishing system comprises a water replenishing pump and a water replenishing channel; and the water replenishing pump is connected with the nozzle on the moving trolley through the water replenishing channel. The device is simple in structure and can clean the wall surface of the reactor pool.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear facility radioactive chemical decontamination, and in particular to a pressurized water reactor reaction water pool wall decontamination device and a use method thereof. Background Art

[0002] Pressurized water reactors have become the main type of reactor for new nuclear power in my country due to their compact structure, small size, high power density, deep average burnup, radioactive fission products that are not easy to escape, good power self-stabilization and self-adjustment characteristics, and high safety and reliability. During the operation of the reactor, radioactive substances will be adsorbed on the wall of the water pool. If not decontaminated in time, these radioactive substances will cause radiation damage to personnel when personnel approach the water pool for daily maintenance and inspection, increasing the risk of radiation diseases. Radioactive substances may react chemically with the wall material of the water pool, accelerate the corrosion of the wall, reduce the structural integrity of the water pool, and affect its service life. In addition, the presence of pollutants may also lead to increased wear of equipment components and affect the normal operation of the equipment.

[0003] In order to increase the power generation of pressurized water reactor nuclear power units, nuclear power plants strive to optimize the overhaul time of the units. In order to reduce the radiation dose of unit maintenance personnel, nuclear power plants need to decontaminate equipment before overhaul. How to achieve efficient and effective decontamination of equipment and ensure the safety of equipment materials has become one of the concerns of nuclear power plants. Reactor pool decontamination is the main line of work for the overhaul of pressurized water reactor nuclear power plants. At present, the domestic method of decontamination of the pool is mostly high-pressure water washing plus manual wiping. However, the height of the reactor pool is relatively high, generally more than ten meters. Since it is impossible to get close to it manually, the high-pressure water washing and decontamination effect of the reactor pool wall is very unsatisfactory.

[0004] In recent years, fuel damage accidents have occurred in some nuclear power plants, which will aggravate the problem of reactor pool wall contamination. Decontamination personnel will be unable to carry out decontamination work on the higher reactor pool walls. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a pressurized water reactor reaction water pool wall decontamination device and a use method to solve the technical problem that the pressurized water reactor reactor pool wall cannot be decontaminated in view of the deficiencies in the above-mentioned prior art.

[0006] The objective of the present invention is achieved by the following technical solutions: In a first aspect, the present invention provides a pressurized water reactor reaction water pool wall decontamination device, including a decontamination trolley and a flushing water replenishment system; The decontamination trolley includes a wall-attached adsorption component, a nozzle, an electric roller brush head and a roller brush head moving guide rail; the wall-attached adsorption component is used to adhere to the wall surface of the reactor water pool to fix the decontamination trolley; the nozzle is arranged at the bottom of the decontamination trolley and at the front of the electric roller brush head, and the port position is used to align with the reactor water pool wall; the electric roller brush head is arranged on the roller brush head moving guide rail and is used to move along the roller brush head moving guide rail; the roller brush head moving guide rail is arranged at the bottom of the decontamination trolley; The flushing water replenishment system includes a replenishment pump and a replenishment channel; the replenishment pump is connected to the nozzle on the mobile trolley through the replenishment channel.

[0007] As a further improvement of the present invention, the wall-adhering adsorption assembly includes an upper suction cup, a lower suction cup, and a lower suction cup moving guide rail; the upper suction cup is fixed on the decontamination trolley, and the lower suction cup is used to move along the lower suction cup moving guide rail.

[0008] As a further improvement of the present invention, a driving mechanism is provided on the lower suction cup, and the driving mechanism is used to drive the lower suction cup to move along the lower suction cup moving guide rail.

[0009] As a further improvement of the present invention, the device also includes a vacuum system, which includes a vacuum pump and a vacuum pipeline, and the vacuum pump is connected to the upper suction cup and the lower suction cup on the mobile trolley through the vacuum pipeline.

[0010] As a further improvement of the present invention, valves are respectively provided on the vacuum pipes connecting the upper suction cup and the lower suction cup.

[0011] As a further improvement of the present invention, a dehydration box is provided in the vacuum pumping system to remove residual water in the pipeline during the vacuum pumping process to avoid affecting the operation of the vacuum pump.

[0012] As a further improvement of the present invention, the electric roller brush head is provided with an electric mechanism, which is used to control the electric roller brush head to move up and down along the roller brush head moving guide rail.

[0013] As a further improvement of the present invention, the upper suction cup and the lower suction cup are both made of soft rubber material with a cavity.

[0014] As a further improvement of the present invention, the water supply channel and the vacuum pipeline are both made of rubber hoses.

[0015] In a second aspect, the present invention provides a method for using a pressurized water reactor reaction water pool wall decontamination device, based on the above-mentioned pressurized water reactor reaction water pool wall decontamination device, comprising: Fix the decontamination trolley to the wall of the reactor pool; The electric roller brush is moved along the roller brush moving guide to the upper limit of the position, the flushing water pump and the electric roller brush are started, and the electric roller brush is moved downward along the roller brush moving guide to clean the wall of the reactor water pool.

[0016] The beneficial effects of the present invention are as follows: a pressurized water reactor reactor water pool wall decontamination device provided by the present invention realizes efficient cleaning of the reactor pool wall through the coordinated work of the nozzle and the electric roller brush head on the decontamination trolley. The electric roller brush head moves via the roller brush head moving guide rail to expand the cleaning range and avoid missing dead corners. The wall-adhering adsorption assembly is used to firmly fix the decontamination trolley on the reactor pool wall to ensure the stability of the equipment during the cleaning process. The decontamination trolley in the present invention integrates key components such as the nozzle, the electric roller brush head, and the wall-adhering adsorption assembly, and has a compact structure, which is easy to install and operate, and the flushing water replenishment system is connected to the decontamination trolley through a replenishment channel, which has a simple structure and is easy to maintain.

[0017] Furthermore, the wall-attached adsorption component uses the upper and lower suction cups to work together to provide greater adsorption force, so that the decontamination trolley can be more firmly adsorbed on the wall of the reactor pool. The double suction cup design can effectively disperse the adsorption force to avoid damage to the wall caused by excessive single-point adsorption force. Even if the wall is uneven, it can ensure a good adsorption effect and improve the applicability of the equipment in complex environments. The nozzle is fixed on the upper part of the roller brush head to keep the roller brush head moist and reduce friction resistance.

[0018] Furthermore, the vacuum system generates negative pressure and cooperates with the upper and lower suction cups to form a vacuum chamber and fix it on the wall. At the same time, the vacuum system can also adjust the adsorption force of the upper and lower suction cups to adapt to walls of different materials and roughness. At the same time, the lower suction cup moves the guide rail to complete the movement and fixation of the decontamination trolley.

[0019] Furthermore, the present invention fixes the decontamination trolley on the wall of the reactor water pool through a suction cup by the principle of negative pressure adsorption, thereby solving the problem of fixing the mobile trolley on the non-magnetic reactor water pool wall surface.

[0020] Furthermore, the cavities in the upper and lower suction cups are made vacuum by controlling the valves. The adsorption sequence and adsorption time of the two suction cups can be flexibly adjusted according to different cleaning requirements and wall conditions. At the same time, by sequentially controlling the adsorption and release of the two suction cups, the step-by-step movement of the decontamination trolley can be achieved.

[0021] Furthermore, by setting up a dehydration box, residual water is prevented from entering, corrosion, wear and failure are avoided, the life of the equipment is extended, and a stable vacuum degree is maintained, the adsorption force is guaranteed, and the stability of the system is improved.

[0022] Furthermore, by setting an electric mechanism on the electric roller brush head to move up and down along the guide rail, manual operation is not required, which simplifies the cleaning operation process, reduces the workload of operators, and improves work efficiency. At the same time, the electric mechanism can accurately control the movement speed and position of the roller brush head to ensure the consistency and uniformity of the cleaning process. In addition, the electric mechanism can control the movement range of the roller brush head on the guide rail and adjust it according to different wall heights and cleaning requirements. The electric mechanism can adjust the movement speed of the roller brush head to adapt to different types and degrees of dirt.

[0023] Furthermore, the water supply channel and vacuum pipe are rubber hoses, which facilitate the movement of the decontamination cart to the bottom of the reactor pool.

[0024] Furthermore, the present invention provides a method in which an electric roller brush head moves along a high-precision roller brush head moving guide rail, starts to move steadily downward from the upper limit of the position, and cooperates with the multi-angle, strong-impact water jet of the bottom nozzle. The water flow and the mechanical force of the roller brush work together to form an all-round peeling and flushing of the dirt, greatly improving the efficiency of a single cleaning. The wall-attached adsorption component adopts a variety of optimized designs, whether it is magnetic adsorption, negative pressure adsorption or composite adsorption, it has been strictly tested and verified in practice. For example, negative pressure adsorption can ensure the close attachment of the trolley under complex wall conditions by relying on the stable internal and external pressure difference; magnetic adsorption exhibits super strong adsorption stability when applied to the wall, greatly reducing the risk of accidental detachment of the trolley during the cleaning process, and providing a solid foundation for continuous and stable decontamination operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is an overall schematic diagram of a pressurized water reactor reaction water pool wall decontamination device of the present invention.

[0027] Figure 2 It is the bottom layout diagram of the decontamination trolley of the present invention.

[0028] In the figure: 1 is the wall of the reactor water pool; 2 is the water supply pump; 3 is the water supply channel; 4 is the vacuum pump; 5 is the dehydration box; 6 is the crane; 7 is the decontamination trolley; 8 is the nozzle; 9 is the electric roller brush head; 10 is the upper suction cup; 11 is the lower suction cup; 12 is the lower suction cup moving guide rail; 13 is the roller brush head moving guide rail. DETAILED DESCRIPTION

[0029] In order to make the purpose and technical solution of the present invention clearer and easier to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, wherein the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] Example 1 like Figure 1-Figure 2 As shown, this embodiment provides a pressurized water reactor reaction water pool wall decontamination device. The device mainly includes a decontamination trolley 7 and a flushing water replenishment system.

[0032] The decontamination trolley 7 includes a wall-attached adsorption component, a nozzle 8, an electric roller brush head 9 and a roller brush head moving guide rail 13; the wall-attached adsorption component is used to adhere to the reactor water pool wall 1 to fix the decontamination trolley 7; the nozzle 8 is arranged at the bottom of the decontamination trolley 7 and at the front of the electric roller brush head 9, and the port position is used to align with the reactor water pool wall 1; the electric roller brush head 9 is arranged on the roller brush head moving guide rail 13, and is used to move along the direction of the roller brush head moving guide rail 13; the roller brush head moving guide rail 13 is arranged at the bottom of the decontamination trolley 7.

[0033] The flushing water replenishment system includes a replenishment pump 2 and a replenishment channel 3; the replenishment pump 2 is connected to the nozzle 8 on the mobile vehicle through the replenishment channel 3.

[0034] After fixing the decontamination trolley 7 on the wall 1 of the reactor water pool by using the wall-adhering adsorption component, turn on the water replenishment pump 2 connected to the nozzle 8 and the electric roller brush head 9. Use the water sprayed from the nozzle 8 to keep the electric roller brush head 9 moist. The electric roller brush head 9 moves up and down on the roller brush head moving guide rail 13 to clean the wall 1 of the reactor water pool.

[0035] The wall-attached adsorption component in this embodiment can adopt any device such as negative pressure adsorption device, magnetic adsorption device, electrostatic adsorption device, fluid adsorption device, etc. The magnetic adsorption device uses the magnetic interaction between the magnetic material and the wall of the reactor pool to generate adsorption force, so that the decontamination equipment can be firmly attached to the wall. The device has strong adsorption force and good stability, does not require external vacuum equipment or complex pneumatic systems, and has a relatively simple structure. However, the adsorption device is only effective for magnetic walls. The electrostatic adsorption device uses the principle of electrostatic adsorption to generate electrostatic attraction between the decontamination equipment and the wall of the reactor pool so that the equipment is attached to the wall. The device is usually composed of an electrostatic generator and an electrostatic adsorption electrode, and a suitable electrostatic field is generated by controlling the voltage and polarity of the electrode. The adsorption process of the adsorption device is relatively stable, with little damage to the wall and no noise. However, the electrostatic adsorption force is greatly affected by factors such as environmental humidity and the conductivity of the wall material. The adsorption effect may be reduced in a high humidity environment or on a wall with poor conductivity. The fluid adsorption device injects high-pressure fluid into a specific flow channel or chamber to form a high-speed fluid film between the decontamination device and the wall surface, and uses the pressure and viscosity of the fluid to adsorb the device on the wall surface. The adsorption force is controlled by adjusting the pressure and flow of the fluid. The adsorption force of the adsorption device can be adjusted in a wide range, has good adaptability to the wall surface, and can adapt to slight deformation of the wall surface to a certain extent.

[0036] As a preferred embodiment, the water supply pump 2 uses a centrifugal pump, which has the characteristics of large flow and moderate head. The pump body of the water supply pump 2 is made of stainless steel and lined with a special radiation-proof and corrosion-resistant coating to ensure long-term stable operation in a nuclear radiation environment. Its impeller design has been optimized and adopts a closed impeller structure to improve the hydraulic efficiency of the pump and reduce energy consumption. At the same time, it is equipped with a variable frequency speed regulation device, which can accurately adjust the flow and head of the pump according to actual flushing needs.

[0037] The water supply channel 3 is composed of a multi-layer composite pipe, the inner layer is a corrosion-resistant polytetrafluoroethylene pipe, the middle layer is a stainless steel braided mesh to enhance the strength of the pipe, and the outer layer is wrapped with a radiation-proof rubber layer. The pipe joints use quick connectors with excellent sealing performance to facilitate installation and disassembly while ensuring no leakage risk. Along the pipeline, multiple pressure monitoring points and flow sensors are set to monitor the water supply status in real time. Once an abnormality occurs, an alarm is immediately issued and the operating parameters of the water supply pump 2 are automatically adjusted.

[0038] Example 2 As a further preferred embodiment, the wall-attaching adsorption assembly includes an upper suction cup 10, a lower suction cup 11, and a lower suction cup moving guide rail 12; the upper suction cup 10 is fixed on the decontamination trolley 7, and the lower suction cup 11 is used to move along the lower suction cup moving guide rail 12. In this embodiment, there are two upper suction cups 10 and two lower suction cups 11, and they are located on the same side.

[0039] The lower suction cup 11 is provided with a driving mechanism, and the driving mechanism is used to drive the lower suction cup 11 to move along the lower suction cup moving guide rail 12 .

[0040] The upper suction cup 10 and the lower suction cup 11 are also connected to a vacuum system. The vacuum system comprises a vacuum pump 4 and a vacuum pipeline, and the vacuum pump 4 is connected to the upper suction cup 10 and the lower suction cup 11 on the mobile decontamination trolley 7 through the vacuum pipeline.

[0041] Among them, valves are respectively provided on the vacuum pipes for connecting the upper suction cup 10 and the lower suction cup 11, and the valves are used to control the vacuum state of the upper suction cup 10 and the lower suction cup 11. The upper suction cup 10 controls the vacuum state through valve K2, and the lower suction cup 11 controls the vacuum state through valve K3. Opening valves K2 and K3 can respectively evacuate the cavities of the upper suction cup 10 and the lower suction cup 11. Closing valves K2 and K3 will destroy the vacuum environment of the cavities of the upper suction cup 10 and the lower suction cup 11.

[0042] The air in the upper suction cup 10 and the lower suction cup 11 is extracted through the vacuum system to form a vacuum environment, thereby achieving the adsorption of the suction cups on the reactor pool wall 1, and then fixing the mobile decontamination vehicle 7 on the reactor pool wall 1.

[0043] A dehydration box 5 is provided in the vacuum system, one end of which is connected to the vacuum pump 4 through a vacuum pipeline, and the other end of which is connected to the upper suction cup 10 and the lower suction cup 11 through a vacuum pipeline. The dehydration box 5 is used to remove the residual water in the pipeline during the vacuum process to avoid affecting the operation of the vacuum pump 4. The dehydration box 5 is also provided with a valve K1, which is used to discharge the residual water.

[0044] The upper suction cup 10 and the lower suction cup 11 are both made of soft rubber material with a cavity. Reinforcement ribs or support frames are added in the cavities of the upper suction cup 10 and the lower suction cup 11. The reinforcement ribs or support frames are made of high-strength, corrosion-resistant and lightweight materials, such as carbon fiber composite materials, which can not only ensure the structural strength of the suction cup during vacuuming and prevent collapse and deformation, but also reduce the overall weight, making it easier for the decontamination trolley 7 to move flexibly.

[0045] The sealing design of the edges of the upper suction cup 10 and the lower suction cup 11 adopts a double-layer lip structure. The inner lip is made of soft silicone material, which fits the wall tightly, and the outer lip is wear-resistant rubber, which provides additional protection and sealing enhancement, reduces the risk of air leakage, and increases the vacuum holding time.

[0046] The electric roller brush head 9 is provided with an electric mechanism, which is used to control the electric roller brush head 9 to move up and down along the roller brush head moving guide rail 13 .

[0047] In addition, the nozzle 8 in this embodiment adopts a conical nozzle, which can accelerate the water flow at the outlet, forming a columnar water flow with strong impact force, effectively stripping the dirt on the wall; the aperture size is determined according to the flow rate, pressure and expected flushing intensity of the water replenishment pump 2. If it is too small, it is easy to be blocked, and if it is too large, it will affect the flushing pressure. The spray angle can be adjusted to adapt to walls of different inclinations to ensure that the water flow fully covers the wall.

[0048] Example 3 As a further preferred implementation of Example 1 and Example 2, the lower suction cup moving guide rail 12 adopts a high-precision linear guide rail with a self-lubricating coating to reduce the friction coefficient, improve the stability and accuracy of the movement of the lower suction cup 11, and ensure accurate positioning and close fit to the wall surface under complex wall conditions. Among them, 1, a dual guide rail design is adopted to increase the redundancy of the system. Even if one guide rail fails, the other guide rail can still ensure the normal operation of the system, thereby improving the reliability of the system.

[0049] The driving mechanism uses a high-precision servo motor, combined with advanced motion control algorithms, to achieve precise control of the moving speed, acceleration and position of the lower suction cup to meet the needs of different cleaning tasks. It also has fault diagnosis and automatic protection functions to improve system reliability.

[0050] At the same time, a multi-stage filtering device is added at the water inlet end of the water supply pump 2, including coarse filtration, fine filtration and ion exchange resin filter element, to remove impurities, suspended matter and corrosive ions in the water, ensure the high purity of the water injected into the nozzle 8, avoid secondary pollution to the wall of the reactor water pool, and extend the service life of the nozzle 8 and the roller brush head.

[0051] In addition, the present embodiment is equipped with an intelligent flow regulating valve and a flow meter, and the water volume of the water supply pump 2 is adjusted according to the intelligent flow regulating valve and the flow meter. The intelligent flow regulating valve and the flow meter are associated with parameters such as the moving speed of the decontamination trolley 7, the rotation speed of the electric roller brush head 9, and the degree of wall pollution, and the water supply volume is accurately adjusted according to actual cleaning needs. For example, when cleaning heavily polluted areas, the water supply volume is automatically increased to improve the flushing effect; when the cleaning is nearing the end and the wall surface is relatively clean, the water supply volume is reduced to save water resources. At the same time, the present embodiment also adds a pressure sensor, which is arranged on the decontamination trolley 7 to monitor the pressure at the outlet of the nozzle 8 in real time, and dynamically adjust the water supply volume according to the pressure change to ensure that the pressure at the outlet of the nozzle 8 is stable and improve the flushing effect.

[0052] Example 4 According to the pressurized water reactor reactor water pool wall decontamination device in Examples 1, 2 and 3, this embodiment provides a method for using the pressurized water reactor reactor water pool wall decontamination device, fixing the decontamination trolley 7 on the reactor pool wall 1; using the electric roller brush head 9 to move to the upper limit of the position along the roller brush head moving guide rail 13, starting the flushing water pump 2 and the electric roller brush head 9, and moving the electric roller brush head 9 downward along the roller brush head moving guide rail 13 to clean the reactor pool 1 wall. The specific implementation method is as follows.

[0053] The steps for using the PWR reactor water pool wall decontamination device are as follows: Step 1: Before hoisting the decontamination trolley 7 into the reactor pool, conduct a comprehensive inspection of all components. Check whether the upper suction cup 10 and the lower suction cup 11 are damaged, whether the nozzle 8 is blocked, whether the bristles of the electric roller brush head 9 are intact, whether the pipes are tightly connected, and whether the insulation of the electrical circuit is normal. Test run the water supply pump 2 to ensure that it runs smoothly, has no abnormal noise, and that the flow rate and head meet the design requirements. At the same time, calibrate all sensors to ensure that the measurement data is accurate and reliable.

[0054] Step 2: After the decontamination trolley 7 is connected to the water supply channel 3, the vacuum pipe and the cable, the decontamination trolley 7 is hoisted into the reactor pool by the crane 6, so that the upper suction cup 10 and the lower suction cup 11 are close to the reactor pool wall 1, the vacuum pump 4 is started, and the valves K2 and K3 are opened to vacuum the cavities of the upper suction cup 10 and the lower suction cup 11, so that the mobile decontamination trolley 7 is fixed on the reactor pool wall 1. The decontamination trolley 7 is hoisted into the reactor pool by the crane 6, and the remote monitoring system is used for precise positioning. The operator can complete the installation of the decontamination trolley 7 in a few simple steps according to the standardized operating procedures, including connecting pipes and cables, starting the vacuum pump to vacuum the fixed trolley, etc. A skilled worker can complete the preliminary preparation and installation in a few minutes, which greatly improves the work efficiency.

[0055] Step 3: Use the electric mechanism on the electric roller brush head 9 to move the electric roller brush head 9 to the upper limit of the position along the roller brush head moving guide rail 13, start the flushing water pump 2 and the electric roller brush head 9, and move the electric roller brush head 9 downward along the roller brush head moving guide rail 13 to clean the wall of the reactor water pool 1.

[0056] Step 4: After the area is cleaned, close valve K2 to destroy the vacuum environment of the upper suction cup 10 cavity, and move the decontamination trolley 7 downward through the electric mechanism set on the lower suction cup 11. After the lower suction cup 11 reaches the upper limit of the lower suction cup moving guide rail 12, open valve K2 to allow the upper suction cup 10 to be adsorbed on the reactor pool wall 1. Close valve K3 to destroy the vacuum environment of the lower suction cup 11 cavity, and use the electric mechanism set on the lower suction cup 11 to allow the lower suction cup 11 to reach the lower limit of the lower suction cup moving guide rail 12. Open K3 to allow the lower suction cup 11 to be adsorbed on the reactor pool wall 1. Repeat steps 3 and 4 to clean the reactor pool wall 1 until the entire wall is cleaned.

[0057] After the cleaning task is completed, turn off the flushing water pump 2, electric roller brush head 9, vacuum pump 4 and other equipment in turn. Open the dehydration tank valve K1 to drain the residual water, then destroy the vacuum environment of all suction cups, and use the crane to slowly lift the decontamination trolley 7 out of the reactor pool. Perform a comprehensive cleaning and maintenance on the trolley, replace worn parts, and prepare for the next operation.

Claims

1. A pressurized water reactor reaction water pool wall decontamination device, characterized in that: It includes a decontamination trolley (7) and a flushing water replenishment system; The decontamination trolley (7) comprises a wall-attaching adsorption component, a nozzle (8), an electric roller brush head (9), and a roller brush head moving guide rail (13); the wall-attaching adsorption component is used to adhere to the reactor water pool wall surface (1) to fix the decontamination trolley (7); the nozzle (8) is arranged at the bottom of the decontamination trolley (7) and at the front of the electric roller brush head (9), and the port position is used to align with the reactor water pool wall surface (1); the electric roller brush head (9) is arranged on the roller brush head moving guide rail (13) and is used to move along the direction of the roller brush head moving guide rail (13); the roller brush head moving guide rail (13) is arranged at the bottom of the decontamination trolley (7); The flushing water replenishment system comprises a replenishment pump (2) and a replenishment channel (3); the replenishment pump (2) is connected to a spray head (8) on the mobile vehicle via the replenishment channel (3).

2. The pressurized water reactor reaction water pool wall decontamination device according to claim 1, characterized in that: The wall-attaching adsorption assembly comprises an upper suction cup (10), a lower suction cup (11), and a lower suction cup moving guide rail (12); the upper suction cup (10) is fixed on the decontamination trolley (7), and the lower suction cup (11) is used to move along the lower suction cup moving guide rail (12).

3. The pressurized water reactor reaction water pool wall decontamination device according to claim 2, characterized in that: A driving mechanism is provided on the lower suction cup (11), and the driving mechanism is used to drive the lower suction cup (11) to move along the lower suction cup moving guide rail (12).

4. The pressurized water reactor reaction water pool wall decontamination device according to claim 2, characterized in that: The device also includes a vacuum pumping system, the vacuum pumping system including a vacuum pump (4) and a vacuum pumping pipeline, the vacuum pump (4) being connected to an upper suction cup (10) and a lower suction cup (11) on the mobile trolley (7) via the vacuum pumping pipeline.

5. The pressurized water reactor reaction water pool wall decontamination device according to claim 4, characterized in that: Valves are respectively provided on the vacuum pipes for connecting the upper suction cup (10) and the lower suction cup (11).

6. The pressurized water reactor reaction water pool wall decontamination device according to claim 4, characterized in that: A dehydration box (5) is provided in the vacuum pumping system, which is used to remove residual water in the pipeline during the vacuum pumping process to avoid affecting the operation of the vacuum pump (4).

7. The pressurized water reactor reaction water pool wall decontamination device according to claim 1, characterized in that: The electric rolling brush head (9) is provided with an electric mechanism, which is used to control the electric rolling brush head (9) to move up and down along the rolling brush head moving guide rail (13).

8. The pressurized water reactor reaction water pool wall decontamination device according to claim 2, characterized in that: The upper suction cup (10) and the lower suction cup (11) are both made of soft rubber material with a cavity.

9. The pressurized water reactor reaction water pool wall decontamination device according to claim 1 or 4, characterized in that: The water supply channel (3) and the vacuum pipe are both made of rubber hoses.

10. A method for using a pressurized water reactor reaction water pool wall decontamination device, based on the pressurized water reactor reaction water pool wall decontamination device according to any one of claims 1 to 9, characterized in that: include: Fixing the decontamination trolley (7) on the wall surface (1) of the reactor pool; By moving the electric roller brush head (9) along the roller brush head moving guide rail (13) to the upper limit of the position, the flushing water pump (2) and the electric roller brush head (9) are started, and the electric roller brush head (9) is moved downward along the roller brush head moving guide rail (13) to clean the wall surface of the reactor water pool (1).

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