A radioactive material cleaning device

Abstract

A radioactive material cleaning device is used for cleaning radioactive solid waste in a hot chamber, and is characterized in that it includes a shell, a drum and a power assembly, wherein the drum is located inside the shell, the drum includes a hollow portion and a spiral slide, the spiral slide is in the form of a spiral in the vertical direction, and the spiral slide is arranged around the hollow portion, the power assembly drives the drum to clean the radioactive solid waste, the power assembly includes a transmission shaft and a driver, the transmission shaft passes through the shell and is connected to the drum, and the driver is located outside the shell and drives the transmission shaft.

Description

Technical Field

[0001] The present application relates to a cleaning tool, and in particular to a radioactive material cleaning device. Background Art

[0002] The solid short segments produced after nuclear fuel is sheared and dissolved carry a large amount of radioactive substances. Before solid waste treatment, the surface of the solid waste needs to be cleaned with deionized water to reduce its radioactivity level.

[0003] Equipment for cleaning radioactive solid waste should meet the following functional requirements: it should be able to continuously and uninterruptedly complete operations such as soaking, rinsing and draining of short sections of radioactive solids. In addition, considering that the cleaning equipment is used in a radioactive environment, the power source of the continuous material cleaner should be set outside the hot room, and the power needs to be input to the moving parts of the cleaning equipment through a device that can penetrate the wall. The penetrating device should have sealing performance to prevent the atmosphere from overflowing. In the event of a fault, personnel can complete direct maintenance of the transmission components in the power room.

[0004] Utility model CN209138158U discloses a high-efficiency filter bag cleaning machine, including a box body, which is fixedly mounted on a supporting leg. The box body is a circular cavity structure, the top of the box body is an open structure, the bottom of the box body is provided with a water outlet, a rotating drum is rotatably mounted in the middle of the bottom of the inner cavity of the box body, one end of a thin steel wire rope is fixedly connected to the side of the rotating drum at equal distances from top to bottom, the other end of the thin steel wire rope is fixedly connected with a clip, semicircular bosses are fixedly mounted at equal distances on the inner wall of the box body along the circumferential direction, a first bevel tooth is provided on the top of the rotating drum, and the first bevel teeth are equidistantly arranged in a circle. In the utility model, the filter bag is placed in the box body for rotation and cleaning, which can effectively clean the dirt on the filter bag, and it can be spun dry after washing, and it can also be dried after spun dry. This scheme cannot achieve continuous cleaning and is not suitable for the field of nuclear chemical industry.

[0005] Utility model CN202958641U discloses a continuous fresh tea leaf dehydrator, including a base, a frame fixed on the base, and a discharge hopper connected to one end of the frame top. Its main technical features are that a solid shaft and a hollow shaft are provided in the base, a spiral propulsion device is connected to the solid shaft, a dehydration drum is connected to the hollow shaft, and a feed drum is provided in the inner cavity of the spiral propulsion device; the spiral propulsion device is composed of left and right support rods connected to the bottom plate, and the support rods respectively fix the left and right spiral pieces; the bottom plate is connected to the solid shaft through a fixing seat at the end of the solid shaft. The fresh tea leaves after washing enter the feed drum of the continuous centrifugal dehydrator. When the fresh tea leaves fall on the bottom plate in the spiral propulsion device, the speed difference between the solid shaft and the hollow shaft is used to push the fresh tea leaves from the bottom to the discharge hopper. This solution cannot complete the soaking and rinsing processes at the same time, and cannot be applied to the nuclear chemical industry. Summary of the invention

[0006] The purpose of this application is to propose a device for continuously cleaning and draining radioactive solid waste in a hot chamber to solve the above-mentioned technical problems.

[0007] To achieve the above-mentioned purpose, the present application provides a radioactive material cleaning device for cleaning radioactive solid waste in a hot chamber, comprising a shell, a rotor and a power assembly, wherein the rotor is located inside the shell, the rotor comprises a hollow portion and a spiral slide, the spiral slide is in the form of a spiral in the vertical direction, the spiral slide is arranged around the hollow portion, the power assembly drives the rotor to clean the radioactive solid waste, the power assembly comprises a transmission shaft and a driver, the transmission shaft passes through the shell and is connected to the rotor, the driver is located outside the shell and drives the transmission shaft.

[0008] Furthermore, the power assembly also includes a wall-penetrating device sleeve, which is arranged around the transmission shaft along the axial direction of the transmission shaft and is fixed to the housing.

[0009] Furthermore, the wall penetration device sleeve includes an outer wall penetration sleeve, which is cast in the wall of the hot chamber, and the outer shell and the driver are respectively located on both sides of the wall of the hot chamber.

[0010] Furthermore, the wall-penetrating device sleeve also includes an inner wall-penetrating sleeve, which is arranged between the outer wall-penetrating sleeve and the transmission shaft, and the transmission shaft, the inner wall-penetrating sleeve and the outer wall-penetrating sleeve are all airtight. Furthermore, the transmission shaft, the inner wall-penetrating sleeve and the outer wall-penetrating sleeve are all equipped with circumferential steps to prevent radiation from passing therethrough.

[0011] Furthermore, the transmission shaft is connected to the drum via a spline to transmit torque.

[0012] Furthermore, the power assembly also includes a pull rod and a locking nut. The transmission shaft is an axial hollow shaft. The pull rod is arranged inside the transmission shaft and the transmission shaft is locked by the locking nut.

[0013] Furthermore, the spiral slideway forms an angle α with the horizontal direction, 2°≤α≤20°.

[0014] Furthermore, the number of layers of the spiral slide in the vertical direction is d, 8≤d≤30.

[0015] Furthermore, at least part of the spiral slide has a stopper on one side close to the hollow portion, and the stopper and the drum wall define a movement space for the solid waste.

[0016] Furthermore, it also includes a flushing pipe and an overflow port, wherein the flushing pipe is located in the hollow portion and the overflow port is arranged on the outer wall of the drum.

[0017] Furthermore, the number of layers of the spiral slide below the overflow height is w, w≤d-3.

[0018] Furthermore, it also includes a feed pipe, a dividing cone, a discharge port and a discharge chute, at least part of the feed pipe is located in the hollow part, the dividing cone is located at the bottom of the hollow part, the discharge port is located on the upper end side of the rotating drum, the discharge chute is arranged adjacent to the discharge port, and the discharge chute passes through the outer shell.

[0019] Furthermore, it also includes a guide sleeve and two or more guide wheels, the guide sleeve is coaxially arranged with the rotating drum, at least one guide wheel is located on the side wall of the rotating drum, and at least one guide wheel is located on the bottom wall of the rotating drum.

[0020] Furthermore, it also includes an end cover and an end cover support, and the end cover is hinged to the end cover support.

[0021] By applying the above technical solution of the present invention, at least the following technical effects are achieved:

[0022] 1. The radioactive material cleaning device is provided with power components such as a through-wall device sleeve, so that its power source is located outside the hot chamber, which is convenient for direct maintenance of the power components outside the hot chamber when a fault occurs, thereby reducing the difficulty of maintenance; and the through-wall device sleeve and the transmission shaft have sealing properties, which can prevent the radioactive atmosphere from overflowing and reduce the radiation dose received by personnel.

[0023] 2. The radioactive material cleaning device is provided with a rotating drum, a flushing pipe, an overflow port, a feed pipe, a discharge port and other structures, so that the radioactive short section enters the inside of the rotating drum through the feed pipe. The spiral slideway realizes the continuous transportation of the material while performing the operations of soaking, flushing and draining, and enters the solid waste filling station through the discharge port. Its operation is continuous and has a high level of automation.

[0024] 3. The radioactive material cleaning device utilizes the inertia of the drum to transport materials, thereby reducing the power source, making the radioactive material cleaning device simple in structure and convenient to operate.

[0025] 4. The end cover of this radioactive material cleaning device can separate and seal the hot chamber and the drum to prevent radioactive substances from diffusing into the hot chamber and polluting the surrounding environment; and in daily maintenance, the end cover can be lifted to facilitate the inspection of the drum.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 A cross-sectional view of a radioactive material cleaning device according to an embodiment is shown;

[0029] Figure 2 A cross-sectional view of a rotating drum in one embodiment is shown;

[0030] Figure 3 A cross-sectional view of a power assembly in one embodiment is shown;

[0031] Figure 4 A partial cross-sectional view of a power assembly in one embodiment is shown.

[0032] Figure numerals: 1. outer shell; 2. rotating drum; 3. power assembly; 4. hollow part; 5. spiral slide; 6. transmission shaft; 7. driver; 8. wall-penetrating device sleeve; 9. pull rod; 10. stopper; 11. flushing pipe; 12. overflow port; 13. feed pipe; 14. dividing cone; 15. discharge port; 16. discharge chute; 17. guide sleeve; 18. guide wheel; 19. end cover; 20. end cover support; 21. transmission shaft sleeve; 22. outer wall-penetrating sleeve; 23. hot chamber wall; 24. inner wall-penetrating sleeve; 25. spline; 26. locking nut; 27. step-shaped fit. DETAILED DESCRIPTION

[0033] 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. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] The present invention is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0035] Example

[0036] The purpose of the present invention is to provide a continuous material cleaning device applicable to radioactive environments, which is used to clean radioactive particles or short sections of surface radioactive solutions in a hot chamber and is applicable to solid materials of different shapes and sizes.

[0037] like Figure 1 As shown, it mainly includes a housing 1, a drum 2 and a power assembly 3. The drum 2 is located inside the housing 1, and the power assembly 3 can drive the drum 2 to clean the radioactive solid waste. The power assembly 3 includes a transmission shaft 6 and a driver 7, one end of the transmission shaft 6 passes through the housing 1 and is connected to the drum 2, and the other end of the transmission shaft 6 is connected to the driver, and the driver 7 inputs the transmission force to the drum 2 through the transmission shaft 6.

[0038] The driver 7 is located outside the housing 1 and is arranged outside the heat chamber. Preferably, the driver 7 adopts a driving cylinder, and the driving cylinder is connected to one end of the transmission shaft 6 through a rocker arm.

[0039] The power generated by the hot room external driver 7 of the present application is input into the drum 2 of the continuous material washer in the hot room through the wall penetration device. The wall penetration device includes a transmission shaft 6 and a wall penetration device sleeve 8, which is arranged around the transmission shaft 6 along the axial direction of the transmission shaft 6 and fixed to the housing 1.

[0040] Specifically, if Figure 3 As shown, the wall-penetrating device sleeve 8 includes an outer wall-penetrating sleeve 22 and an inner wall-penetrating sleeve 24. The outer wall-penetrating sleeve 22 is cast in the heat chamber wall 23, and the housing 1 and the driver 7 are respectively located on both sides of the heat chamber wall 23. The inner wall-penetrating sleeve 24 is arranged between the outer wall-penetrating sleeve 22 and the transmission shaft 6.

[0041] Seals are provided between the transmission shaft 6, the inner wall sleeve 24 and the outer wall sleeve 22, so that the wall-penetrating device is airtight and prevents the radioactive atmosphere in the hot room from leaking out from the gap of the wall-penetrating device. Preferably, there are circumferential step-shaped fits 27 between the transmission shaft 6, the inner wall sleeve 24 and the outer wall sleeve 22 to prevent radiation from directly passing through them. Figure 4 As shown, the power assembly 3 also includes a tie rod 9, a spline 25 and a locking nut 26. The transmission shaft 6 is an axial hollow shaft, and the tie rod 9 is arranged inside the transmission shaft 6, and the transmission shaft 6 is locked axially by the locking nut 26. The transmission shaft 6 is connected to the drum 2 through the spline 25 to transmit torque. The tie rod 9 is also a wall-penetrating device, and there is also air tightness between the tie rod 9 and the transmission shaft 6. When repairing the power assembly, the transmission shaft can be pulled out after loosening the tie rod.

[0042] The radioactive material cleaning device is provided with power components such as a through-wall device sleeve, so that its power source is located outside the hot chamber, which is convenient for direct maintenance of the power components outside the hot chamber when a failure occurs, thereby reducing the difficulty of maintenance; and the through-wall device sleeve and the transmission shaft have sealing properties, which can prevent the radioactive atmosphere from overflowing and reduce the radiation dose received by personnel.

[0043] Combination Figure 1 and Figure 2 As shown, the drum 2 includes a hollow portion 4 and a spiral slide 5. The spiral slide 5 is in a spiral form, specifically, in a spiral form in the vertical direction, which is located on the inner wall of the drum and arranged around the hollow portion 4. At least part of the spiral slide 5 has a stopper 10 on one side close to the hollow portion 4, and the stopper 10 and the drum wall of the drum 2 define a movement space for solid waste.

[0044] The radioactive material cleaning device of the present application also includes a feed pipe 13, a dividing cone 14, at least part of the feed pipe 13 is located in the hollow part 4, the dividing cone 14 is located at the bottom of the hollow part 4, and the short segments of radioactive solid fall onto the dividing cone 14 through the feed pipe 13, thereby entering the interior of the drum 2.

[0045] In addition, it also includes a discharge port 15 and a discharge chute 16. The discharge port 15 is located on the upper side of the drum 2, and the discharge chute 16 is arranged adjacent to the discharge port 15, and the discharge chute 16 passes through the shell 1. The material can enter the discharge chute 16 from the discharge port 15 and be discharged outside the shell. During use, the drum 2 performs reciprocating rotation at a certain frequency cycle, and the radioactive solid material inside spirally slides along the spiral slide 5, thereby pushing the material upward so that it is discharged from the discharge port 15, completing the cleaning process.

[0046] In the prior art, after the drum completes material cleaning, it is often necessary to provide power to push the material in the drum out. The radioactive material cleaning device utilizes the inertia of the drum to transport the material, thereby reducing the power source, making the radioactive material cleaning device simple in structure and convenient to operate.

[0047] In order to realize the smooth transportation of radioactive materials, in the present application, the spiral slideway 5 is arranged to form an angle α with the horizontal direction, 2°≤α≤20°. The number of layers of the spiral slideway 5 in the vertical direction is d, 8≤d≤30.

[0048] The radioactive material cleaning device of the present application also includes a flushing pipe 11 and an overflow port 12, which can perform soaking, flushing and draining operations while the material is continuously transported. The flushing pipe 11 is located in the hollow portion 4, and the overflow port 12 is arranged on the outer wall of the drum 2. Preferably, the lower part of the flushing pipe 11 is close to the feed pipe 13, and deionized water is sprayed for flushing while the material rises along the spiral slide 5, and the drum rotates to continuously discharge the deionized water from the overflow port 12.

[0049] In order to make the overflow port 12 function better, the present application sets the number of layers of the spiral slideway 5 below the height of the overflow port 12 to w, w≤d-3.

[0050] The above relationship ensures that the solid waste generated during the nuclear fuel processing can be well cleaned and an ideal drainage effect can be achieved. It can also simplify the equipment structure as much as possible and reduce the equipment cost while ensuring the effect.

[0051] The radioactive material cleaning device is provided with a rotating drum, a flushing pipe, an overflow port, a feed pipe, a discharge port and other structures, so that the radioactive short section enters the interior of the rotating drum through the feed pipe, and the spiral slideway realizes the operations of soaking, flushing and draining while continuously conveying the material and entering the solid waste filling station through the discharge port, and the operation is continuous and the automation level is high.

[0052] like Figure 1As shown, the radioactive material cleaning device of the present application further includes a guide sleeve 17 and two or more guide wheels 18. The guide sleeve 17 is coaxially arranged with the drum 2, at least one guide wheel 18 is located on the side wall of the drum 2, and at least one guide wheel 18 is located on the bottom wall of the drum 2. When the drum rotates, the drum is constrained by the guide wheels 18 and the guide sleeve 17, and the guide wheels are circumferentially limited when the drum reciprocates to prevent the drum from vibrating too much due to the rotation.

[0053] In addition, the radioactive material cleaning device of the present application also includes an end cover 19 and an end cover support 20, and the end cover 19 is hinged to the end cover support 20. The end cover is installed on the outside of the entire equipment and covers the drum 2. The feed pipe 13, the discharge chute 16 and the flushing pipe 11 are all installed on the end cover 19. In addition, the end cover 19 also includes a lifting ring and a locking mechanism, the lifting ring is used for lifting during maintenance, and the locking mechanism is used to lock with the outer shell after the end cover is covered. The end cover of the radioactive material cleaning device can separate and seal the hot chamber and the drum to prevent radioactive substances from diffusing into the hot chamber and polluting the surrounding environment; and in daily maintenance, the end cover can be lifted to facilitate the maintenance of the drum.

[0054] The specific working process of this application is as follows: when the cleaner is working, the material enters the inside of the drum filled with cleaning liquid through the feed pipe, driving the oil cylinder to reciprocate, and the transmission shaft in the wall-penetrating device drives the drum to reciprocate on the chassis; the material rises along the spiral slide inside the drum, completing the cleaning and draining processes during the rising process, and is discharged from the discharge chute.

[0055] When the material is being cleaned, it is scattered on the dividing cone. During the reciprocating rotation of the drum, the inertial force generated drives the material to rise along the spiral slideway. During the rising process, the cleaning and draining processes are completed. Under the action of inertial force, the material is thrown out of the discharge port to complete the material cleaning.

[0056] During maintenance, disconnect the connecting bolts between the drive cylinder and the transmission shaft, loosen the pull rod, pull out the transmission shaft, and the drum can be lifted by a crane to the maintenance station for maintenance.

[0057] By applying the above technical scheme of the present invention, at least the following technical effects are achieved: 1. The radioactive material cleaning device is provided with power components such as the wall-penetrating device sleeve, so that its power source is located outside the hot chamber, which is convenient for direct maintenance of the power components outside the hot chamber when a fault occurs, thereby reducing the difficulty of maintenance; and the wall-penetrating device sleeve and the transmission shaft have sealing properties, which can prevent the radioactive atmosphere from overflowing and reduce the radiation dose received by personnel. 2. The radioactive material cleaning device is provided with structures such as a rotating drum, a flushing pipe, an overflow port, a feed pipe, and a discharge port, so that the radioactive short section enters the inside of the rotating drum through the feed pipe, and the spiral slide realizes the continuous transportation of materials while performing the operations of soaking, flushing and draining, and enters the solid waste filling station through the discharge port, and its operation is continuous and has a high level of automation. 3. The radioactive material cleaning device uses the inertia of the rotating drum to transport materials, thereby reducing the power source, making the radioactive material cleaning device simple in structure and convenient to operate. 4. The end cover of this radioactive material cleaning device can separate and seal the hot chamber and the drum to prevent radioactive substances from diffusing into the hot chamber and polluting the surrounding environment; and in daily maintenance, the end cover can be lifted to facilitate the inspection of the drum.

[0058] The above are only a number of specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0060] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Claims

1. A radioactive material cleaning device for cleaning radioactive solid waste in a hot chamber, characterized in that: The invention comprises a housing (1), a rotating drum (2) and a power assembly (3), wherein the rotating drum (2) is located inside the housing (1), the rotating drum (2) comprises a hollow portion (4) and a spiral slideway (5), the spiral slideway (5) is in the form of a spiral in the vertical direction, and the spiral slideway (5) is arranged around the hollow portion (4), the power assembly (3) drives the rotating drum (2) to clean the radioactive solid waste, the power assembly (3) comprises a transmission shaft (6) and a driver (7), the transmission shaft (6) passes through the housing (1) and is connected to the rotating drum (2), and the driver (7) is located outside the housing (1) and drives the transmission shaft (6); The radioactive material cleaning device further comprises a flushing pipe (11) and an overflow port (12), wherein the flushing pipe (11) is located in the hollow portion (4), and the overflow port (12) is arranged on the outer wall of the rotating drum (2); The power assembly (3) further comprises a wall penetration sleeve (8), wherein the wall penetration sleeve (8) is arranged around the transmission shaft (6) along the axial direction of the transmission shaft (6), and the wall penetration sleeve (8) is fixed to the housing (1).

2. The radioactive material cleaning device according to claim 1, characterized in that: The wall penetration device sleeve (8) comprises an outer wall penetration sleeve (22), the outer wall penetration sleeve (22) is cast in a hot chamber wall (23), and the housing (1) and the driver (7) are respectively located on two sides of the hot chamber wall (23).

3. The radioactive material cleaning device according to claim 2, characterized in that: The wall penetration device sleeve (8) further comprises an inner wall penetration sleeve (24), wherein the inner wall penetration sleeve (24) is arranged between the outer wall penetration sleeve (22) and the transmission shaft (6), and the transmission shaft (6), the inner wall penetration sleeve (24) and the outer wall penetration sleeve (22) are airtight.

4. The radioactive material cleaning device according to claim 3, characterized in that: The transmission shaft (6), the inner wall-penetrating sleeve (24) and the outer wall-penetrating sleeve (22) are all provided with circumferential step-shaped fittings (27) to prevent radiation from passing therethrough.

5. The radioactive material cleaning device according to claim 3, characterized in that: The transmission shaft (6) is connected to the drum (2) via a spline (25) to transmit torque.

6. The radioactive material cleaning device according to any one of claims 2 to 5, characterized in that: The power assembly (3) further comprises a pull rod (9) and a locking nut (26); the transmission shaft (6) is an axial hollow shaft; the pull rod (9) is arranged inside the transmission shaft (6) and locks the transmission shaft (6) via the locking nut (26).

7. The radioactive material cleaning device according to claim 1, characterized in that: The spiral slideway (5) forms an angle α with the horizontal direction, 2°≤α≤20°.

8. The radioactive material cleaning device according to claim 7, characterized in that: The number of layers of the spiral slideway (5) in the vertical direction is d, and 8≤d≤30.

9. The radioactive material cleaning device according to claim 8, characterized in that: At least part of the spiral slideway (5) has a stopper (10) on one side close to the hollow portion (4), and the stopper (10) and the drum wall of the rotating drum (2) define a movement space for the solid waste.

10. The radioactive material cleaning device according to claim 1, characterized in that: The number of layers of the spiral slideway (5) below the height of the overflow port (12) is w, w≤d-3.

11. The radioactive material cleaning device according to any one of claims 7 to 10, characterized in that: It also includes a feed pipe (13), a distribution cone (14), a discharge port (15) and a discharge chute (16), wherein at least a portion of the feed pipe (13) is located at the hollow portion (4), the distribution cone (14) is located at the bottom of the hollow portion (4), the discharge port (15) is located on the upper side of the rotating drum (2), the discharge chute (16) is arranged adjacent to the discharge port (15), and the discharge chute (16) passes through the outer shell (1).

12. The radioactive material cleaning device according to any one of claims 7 to 10, characterized in that: It also comprises a guide sleeve (17) and two or more guide wheels (18), wherein the guide sleeve (17) is coaxially arranged with the rotating drum (2), at least one of the guide wheels (18) is located on the side wall of the rotating drum (2), and at least one of the guide wheels (18) is located on the bottom wall of the rotating drum (2).

13. The radioactive material cleaning device according to any one of claims 7 to 10, characterized in that: It also comprises an end cover (18) and an end cover support (19), wherein the end cover (18) is hingedly connected to the end cover support (19).

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