Spent fuel assembly fragmentation process

Abstract

The embodiment of the present application relates to the technical field of spent fuel treatment, and particularly relates to a spent fuel assembly crushing treatment method. The method comprises the following steps: S100: picking up a spent fuel assembly from a spent fuel assembly pool; S200: transferring the spent fuel assembly from the spent fuel assembly pool to a loading hot cell, and changing the posture of the spent fuel assembly from a first posture to a second posture; S300: pushing the spent fuel assembly in the loading hot cell to a feeding hot cell; S400: closing the channel between the loading hot cell and the feeding hot cell; S500: rotating the spent fuel assembly in the feeding hot cell to change the spent fuel assembly from the second posture to a third posture, and the spent fuel assembly is transported to a shearing feeding position; S600: transporting the spent fuel assembly to a shearing position to perform shearing. In the embodiment of the present application, the treatment method can treat the spent fuel assembly in the form of a hexagonal outer sleeve and made of stainless steel structural material.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of spent fuel processing technology, specifically to a method for crushing spent fuel assemblies. Background Technology

[0002] The statements herein are provided merely as background information relating to the invention and do not necessarily constitute prior art. The reprocessing of spent fuel assemblies generally includes the fragmentation and component separation of the spent fuel assemblies, the chemical dissolution and separation of the active segments of the spent fuel, and the tail-end treatment of uranium and plutonium. During the fragmentation process, a shearing system disintegrates the spent fuel assembly and provides processable spent fuel fragments as feedstock for subsequent dissolution processes. Summary of the Invention

[0003] A brief overview of the invention is given below to provide a basic understanding of certain aspects of it. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0004] Embodiments of the present invention provide a method for crushing spent fuel assemblies. The spent fuel assembly includes a first end, a second end, a spent fuel active section, and an outer casing. The first end and the second end are fixedly connected to the outer casing at their respective ends. The spent fuel active section is disposed within the outer casing, and the length of the first end is shorter than the length of the second end. The crushing process includes the following steps: S100: Picking up spent fuel assemblies from the spent fuel assembly pool; S200: Transferring the spent fuel assembly from the spent fuel assembly pool to the feeding hot chamber, and changing the attitude of the spent fuel assembly from a first attitude to a second attitude, wherein the first attitude is perpendicular to the second attitude, and the position of the first end is higher than the position of the second end in the first attitude; S300: Pushing the spent fuel assembly in the feeding hot chamber to the feeding hot chamber; S400: Closing the channel between the feeding hot chamber and the feeding hot chamber; S500: Rotating the spent fuel assembly in the feeding hot chamber to change the spent fuel assembly from the second attitude to a third attitude, and the spent fuel assembly is transported to the shearing feeding position; S600: Transporting the spent fuel assembly to the shearing position for shearing.

[0005] The processing method in the embodiments of the present invention can process spent fuel assemblies with hexagonal outer tubes and stainless steel structures. It can cut the spent fuel assemblies as a whole without breaking the outer tubes, and cut them into fragments suitable for dissolution, thereby improving the processing efficiency of spent fuel assemblies. Attached Figure Description

[0006] Other objects and advantages of the invention will become apparent from the following description of embodiments of the invention with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the invention.

[0007] Figure 1 This is a schematic diagram of a spent fuel assembly processing system according to an embodiment of the present invention.

[0008] Figure 2 This is a schematic diagram of a feeding system according to an embodiment of the present invention.

[0009] Figure 3 yes Figure 2 A partial structural diagram of the feeding system.

[0010] Figure 4 This is a schematic diagram of the structure of a power assembly and a drive shaft according to an embodiment of the present invention.

[0011] Figure 5 This is a cross-sectional view of a drive shaft according to an embodiment of the present invention.

[0012] Figure 6 This is a schematic diagram of the structure of a rotating bearing assembly according to an embodiment of the present invention.

[0013] Figure 7 This is a cross-sectional view of a rotating bearing assembly according to an embodiment of the present invention.

[0014] Figure 8 This is a schematic diagram of a rotary switching device according to an embodiment of the present invention.

[0015] Figure 9 This is a schematic diagram of the structure of a coupling according to an embodiment of the present invention.

[0016] Figure 10 This is a schematic diagram of a coupling in a connected state according to an embodiment of the present invention.

[0017] Figure 11 This is a schematic diagram of a coupling in an open state according to an embodiment of the present invention.

[0018] Figure 12 This is a schematic diagram of the structure of a rotating hopper according to an embodiment of the present invention.

[0019] Figure 13 yes Figure 12 A structural schematic diagram of the rotating silo from another perspective.

[0020] Figure 14 This is a schematic diagram of the installation and assembly of a rotating hopper and a rotating bearing assembly according to an embodiment of the present invention.

[0021] Figure 15This is a schematic diagram of the structure of a rotating hopper in the receiving position according to an embodiment of the present invention.

[0022] Figure 16 This is a schematic diagram of the structure of a rotating hopper in the shearing feeding position according to an embodiment of the present invention.

[0023] Figure 17 yes Figure 3 Enlarged view of point A in the middle.

[0024] Figure 18 This is a schematic diagram of a snap fastener assembly in a pressed state according to an embodiment of the present invention.

[0025] Figure 19 This is a schematic diagram of the structure of a pushing device according to an embodiment of the present invention.

[0026] Figure 20 This is a schematic diagram of a pushing device according to an embodiment of the present invention.

[0027] Figure 21 This is a schematic diagram of the structure of an inflatable sealing assembly according to an embodiment of the present invention.

[0028] Figure 22 This is a schematic diagram of the installation process of an inflatable sealing assembly according to an embodiment of the present invention.

[0029] Figure 23 This is a schematic diagram of the structure of an air intake assembly according to an embodiment of the present invention.

[0030] Figure 24 yes Figure 23 Cross-sectional view of the middle air intake assembly.

[0031] Figure 25 This is a schematic diagram of the structure of the drive shaft, chain assembly, and push assembly according to an embodiment of the present invention.

[0032] Figure 26 This is a schematic diagram of the structure of a push component according to an embodiment of the present invention.

[0033] Figure 27 This is a schematic diagram of the structure of a push connection part according to an embodiment of the present invention.

[0034] Figure 28 This is a schematic diagram of the structure of the pusher part according to an embodiment of the present invention.

[0035] Figure 29 This is a schematic diagram of the structure of a shearing device and a hydraulic drive device according to an embodiment of the present invention.

[0036] Figure 30 This is a top view schematic diagram of a shearing device according to an embodiment of the present invention.

[0037] Figure 31 This is a cross-sectional view of a shearing device according to an embodiment of the present invention.

[0038] Figure 32 This is a schematic diagram of the shear trap and the end receiving container located at the receiving station according to an embodiment of the present invention.

[0039] Figure 33 This is a schematic diagram of the shear trap and the end receiving container located at the cleaning and transfer station according to an embodiment of the present invention.

[0040] Figure 34 This is a schematic diagram of the shear trap and end receiving container according to an embodiment of the present invention.

[0041] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0042] Exemplary embodiments of the invention will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this invention.

[0043] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the device structure and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0044] The inventors of this invention have discovered that, in spent fuel reprocessing, traditional spent fuel assembly processing methods are mostly used for processing quadrilateral pressurized water reactor spent fuel assemblies, and are difficult to apply to processing hexagonal stainless steel spent fuel assemblies. Therefore, embodiments of this invention provide a spent fuel assembly processing method for cutting hexagonal stainless steel spent fuel assemblies into fragments suitable for dissolution, facilitating subsequent processing.

[0045] The spent fuel assembly includes a first end, a second end, a spent fuel active section, and an outer sleeve. The first and second ends are fixedly connected to the outer sleeve at their respective ends. The spent fuel active section is disposed inside the outer sleeve, and the length of the first end is shorter than the length of the second end.

[0046] The processing method provided in the embodiments of the present invention includes the following steps S100 to S600.

[0047] S100: Retrieve spent fuel assemblies from the spent fuel assembly pool;

[0048] S200: Transfer the spent fuel assembly from the spent fuel assembly pool to the charging hot chamber, and change the attitude of the spent fuel assembly from a first attitude to a second attitude. The first attitude is perpendicular to the second attitude, and in the first attitude, the position of the first end is higher than the position of the second end.

[0049] S300: Pushes the spent fuel assembly in the feeding hot chamber to the feeding hot chamber;

[0050] S400: Encloses the passage between the loading hot chamber and the feeding hot chamber;

[0051] S500: The spent fuel assembly is rotated in the feeding hot chamber to change the spent fuel assembly from the second posture to the third posture, and the spent fuel assembly is transported to the shearing feeding position.

[0052] S600: Transport the spent fuel assembly to the shearing position for shearing.

[0053] The processing method in the embodiments of the present invention can process hexagonal stainless steel spent fuel assemblies. It can cut the spent fuel assemblies as a whole without breaking the outer casing of the spent fuel assemblies, and can cut them into fragments suitable for dissolution, thereby improving the processing efficiency of spent fuel assemblies.

[0054] The spent fuel assembly is stored in a spent fuel assembly pool in a first orientation (i.e., vertical), with the first end of the spent fuel assembly facing upwards. In some embodiments, step S200 includes: grasping the first end, lifting the spent fuel assembly away from the shielding water layer; draining the spent fuel assembly before it enters the loading hot chamber; and changing the orientation of the spent fuel assembly from the first orientation to a second orientation after it has been drained. In this embodiment, the final product obtained after the spent fuel assembly is sheared includes powder. Draining the spent fuel assembly before feeding it into the loading hot chamber can prevent residual water on the spent fuel assembly from mixing with the powder after subsequent shearing, thus avoiding the formation of a mixture.

[0055] like Figure 1As shown, in some embodiments, a lifting and tilting system is provided in the feeding hot chamber 2, which includes a lifting and tilting device 11 and a lifting hopper. In steps S100 and S200, the lifting and tilting device 11 and the lifting hopper can be used to pick up and transfer spent fuel assemblies. Specifically, the feeding hot chamber 2 is located above the spent fuel assembly pool 1. The lifting and tilting device 11 can drive the lifting hopper to move into the spent fuel assembly pool 1 to receive the spent fuel assemblies to be processed, and the lifting and tilting device 11 can drive the lifting hopper to tilt, so that the spent fuel assembly changes from a first posture to a second posture.

[0056] In some embodiments, an underwater transfer device 12 is provided in the spent fuel assembly pool 1. In step S100, a crane can be used to lift the spent fuel assembly to be processed to the underwater transfer device 12. The underwater transfer device 12 can transfer the spent fuel assembly to a designated position below the lifting hopper for subsequent transfer.

[0057] Further, in step S200, the lifting hopper can be controlled to rotate downwards by 90° to make it vertical, and at the same time, the lower end of the lifting hopper is positioned in the spent fuel assembly pool 1. The gripper installed in the lifting hopper can grab the spent fuel assembly located at a designated position in the spent fuel assembly pool 1 and lift it into the lifting hopper. At this time, the spent fuel assembly is still in the first posture, i.e., the vertical state. After the spent fuel assembly is received, the lifting hopper can be controlled to rotate upwards by 90° to make it horizontal, and at the same time, the lifting hopper is rotated back into the feeding hot chamber 2, thereby changing the spent fuel assembly from the first posture to the second posture (i.e., the horizontal state), so that the spent fuel assembly is pushed horizontally into the feeding hot chamber 3, realizing the horizontal feeding of the spent fuel assembly.

[0058] like Figure 1 As shown, the lifting and tilting system also includes a pushing device 13, which is disposed in the feeding hot chamber 2. In step S300, the pushing device 13 can be used to push the spent fuel assembly in the lifting hopper into the feeding hot chamber 3.

[0059] Furthermore, a rotating hopper 20 is provided inside the feeding hot chamber 3, and a first transition chamber 31 connects the feeding hot chamber 2 and the feeding hot chamber 3. When the lifting hopper is flipped to a horizontal state, it connects with one end of the first transition chamber 31, and the other end of the first transition chamber 31 connects with the rotating hopper 20 inside the feeding hot chamber 3. The pushing device 13 can push the spent fuel assembly in the lifting hopper into the rotating hopper 20 via the first transition chamber 31.

[0060] like Figure 1As shown, in some embodiments, the first transition chamber 31 is connected to an airtight door 33 at one end within the feeding hot chamber 3. The airtight door 33 can be closed or opened, thereby enabling communication or isolation between the loading hot chamber 2 and the feeding hot chamber 3. In step S400, after the spent fuel assembly is pushed into the rotating hopper 20 within the feeding hot chamber 3, the airtight door 33 can be closed to seal the passage between the loading hot chamber 2 and the feeding hot chamber 3.

[0061] like Figure 1 As shown, a feeding system 40 is provided in the feeding hot chamber 3. The feeding system 40 can drive the rotating hopper 20 to rotate 180°, so as to realize the 180° rotation of the spent fuel assembly in the rotating hopper 20, so as to change it from the second posture to the third posture.

[0062] In this embodiment, after the lifting hopper is flipped, the spent fuel assembly is in a second posture, with the second end of the spent fuel assembly facing the feeding hot chamber 3. The spent fuel assembly needs to be sheared in the order of the first end, the spent fuel active section, and the second end. In this embodiment, after the spent fuel assembly is pushed into the feeding hot chamber 3, the rotating hopper 20 drives the spent fuel assembly to rotate horizontally by 180°, so that the first end faces the shearing hot chamber 4, thereby enabling the spent fuel assembly to be sheared in the order of the first end, the spent fuel active section, and the second end.

[0063] In some embodiments, after the feeding system 40 drives the rotary hopper 20 to rotate into position, the spent fuel assembly is located at the shearing feeding position. At this time, the feeding system 40 can push the spent fuel assembly in the rotary hopper 20 into the shearing chamber 4 for shearing.

[0064] like Figure 1 As shown, a shearing device 50 is provided inside the shearing chamber 4. In step S600, the shearing device 50 can be used to shear the spent fuel assembly. Specifically, when the spent fuel assembly is transported to the shearing position inside the shearing device 50, the shearing device 50 can shear the spent fuel assembly.

[0065] In some embodiments, such as Figure 1 As shown, a second transition chamber 32 connects the feeding hot chamber 3 and the shearing hot chamber 4. A rotating hopper 20 is rotatably disposed between the first transition chamber 31 and the second transition chamber 32. One end of the second transition chamber 32 can dock with the rotating hopper 20, and the other end docks with the feed inlet of the shearing device 50. When the rotating hopper 20 is in the receiving position, it is connected to the first transition chamber to receive spent fuel assemblies. When the rotating hopper 20 is in the shearing feeding position, it docks with the second transition chamber 32, thereby pushing the spent fuel assemblies into the shearing device 50 via the second transition chamber 32.

[0066] Figure 2A schematic diagram of a feeding system 40 according to an embodiment of the present invention is shown. Figure 2 As shown, in some embodiments, the feeding system 40 within the feeding hot chamber 3 includes a pushing device 100 and a rotary switching device 300. The rotary hopper 20 is used to receive spent fuel assemblies pushed from the feeding hot chamber 2. The rotary hopper 20 is mounted on the rotary switching device 300, which is configured to support and drive the rotary hopper 20 to rotate, thereby switching the rotary hopper 20 between a receiving position and a shearing feeding position to change the direction of the spent fuel assemblies within the rotary hopper 20.

[0067] When the rotary hopper 20 rotates to the receiving position, it docks with the first transition chamber 31 to receive spent fuel assemblies. When the rotary hopper 20 rotates to the shearing and feeding position, both ends of the rotary hopper 20 are sealed to the pushing device 100 and the second transition chamber 32, respectively. The pushing device 100 pushes the spent fuel assemblies in the rotary hopper 20 toward the shearing device 50, thereby pushing the spent fuel assemblies through the second transition chamber 32 into the shearing device 50. The shearing device 50 shears the spent fuel assemblies pushed into the shearing device 50.

[0068] In this embodiment of the invention, the rotary hopper 20 receives spent fuel assemblies conveyed by the pushing device 100. By providing a rotation switching device 300, the rotary hopper 20 can rotate 180° in the horizontal direction, causing the spent fuel assemblies pushed into the rotary hopper 20 to rotate from a second end facing forward to a first end facing forward. This allows the spent fuel assemblies to be conveyed into the shearing device 50 with the first end facing forward, thus satisfying the requirement that the spent fuel assemblies be sheared sequentially in the order of the first end, the active section of spent fuel, and the second end. Furthermore, the rotary hopper 20 is rotatably disposed between the shearing device 50 and the pushing device 100, facilitating the pushing of the pushing device 100 to deliver the spent fuel assemblies into the shearing device 50, thereby achieving the shearing of the spent fuel assemblies. This improves the safety and reliability of the spent fuel assembly shearing process and increases the processing efficiency of the spent fuel assemblies.

[0069] like Figure 3As shown, in some embodiments, the rotary switching device 300 may include a power assembly 310, a drive shaft 320, and a rotary bearing assembly 330. One end of the drive shaft 320 is connected to the power assembly 310, which drives the drive shaft 320 to rotate. The rotary bearing assembly 330 is drively connected to the other end of the drive shaft 320, which drives the rotary bearing assembly 330 to rotate about an axis perpendicular to the drive shaft 320. The rotary hopper 20 is supported by the rotary bearing assembly 330, which supports and drives the rotary hopper 20 to rotate, thereby switching the rotary hopper 20 between a receiving position and a shearing feeding position. In this embodiment, by setting the rotating bearing component 330, the rotating hopper 20 can be rotated in the horizontal direction to change the direction of the spent fuel assembly fed into the rotating hopper 20. The spent fuel assembly in the rotating hopper 20 is rotated from the second end facing forward to the first end facing forward, so that the spent fuel assembly is conveyed into the shearing device 50 in the direction of the first end facing forward, so as to meet the requirement that the spent fuel assembly needs to be sheared in the order of the first end, the spent fuel active section, and the second end.

[0070] In this embodiment, when the rotary hopper 20 is in the receiving position, it can receive spent fuel assemblies pushed from the feeding hot chamber 2. After receiving the spent fuel assemblies, the rotary bearing assembly 330 drives the rotary hopper 20 to rotate, causing the rotary hopper 20 to switch to the shearing feeding position, and simultaneously realizing the reversal of the spent fuel assemblies. When the rotary hopper 20 is in the shearing feeding position, the spent fuel assemblies in the rotary hopper 20 can be pushed into the shearing device 50.

[0071] like Figure 4 As shown, in some embodiments, the power assembly 310 includes a driver 311 and a reducer 312. The driver 311 provides power to the drive shaft 320, and the reducer 312 is connected between the driver 311 and the drive shaft 320. The reducer 312 transmits the power from the driver 311 to the drive shaft 320 while reducing the rotational speed so that the rotational speed of the drive shaft 320 meets the requirements. In some embodiments, the driver 311 is a motor, such as a servo motor.

[0072] Furthermore, a coupling 313 is connected between the driver 311 and the reducer 312. The coupling 313 can compensate for the misalignment between the output shaft of the driver 311 and the input shaft of the reducer 312, and also has a buffering and vibration damping function. For example, the coupling 313 in this embodiment can be a flexible coupling.

[0073] Since the rotating hopper 20 is used to hold spent fuel assemblies, which are radioactive, the rotating support assembly 330 and the rotating hopper 20 are disposed inside the feeding hot chamber 3 to shield the spent fuel assemblies from radioactive radiation, thus providing protection. In some embodiments, the power assembly 310 is disposed outside the feeding hot chamber to prevent the power assembly 310 from being affected by radioactive radiation and thus ensuring its normal operation.

[0074] like Figure 5 As shown, the drive shaft 320 includes a solid shaft 321, a hollow shaft 322, and a fixing part 323. The solid shaft 321 is connected to the power assembly 310, and the hollow shaft 322 is connected between the solid shaft 321 and the rotating bearing assembly 330. The solid shaft 321 is rotatably sleeved within the fixing part 323, which is configured to penetrate through the wall of the feeding hot chamber 3. The fixing part 323 is used to install the solid shaft 321 within the wall of the feeding hot chamber 3, thereby transmitting the power provided by the power assembly 310 outside the feeding hot chamber 3 to the rotating bearing assembly 330 inside the feeding hot chamber 3. In this embodiment, the fixing part 323 encloses the solid shaft 321, allowing the solid shaft 321 to rotatably penetrate through the wall.

[0075] In this embodiment, the solid shaft 321 penetrates the wall, while the hollow shaft 322 is suspended between the wall and the rotating load-bearing assembly 330. Using a solid shaft 321 for the portion penetrating the wall increases the strength and torsional resistance of the drive shaft 320, while using a hollow shaft 322 for the suspended portion reduces deflection caused by the drive shaft 320's own weight, effectively ensuring the horizontality of the drive shaft 320. Furthermore, the solid shaft 321 and the hollow shaft 322 can be connected by welding.

[0076] like Figure 6 and Figure 7 As shown, in some embodiments, the rotating bearing assembly 330 may include: a bearing portion 331, a body portion 332, a power input portion 333, and a power output portion 334. The rotating hopper 20 is supported on the bearing portion 331, which is rotatably mounted on the body portion 332. A drive shaft 320 is connected to the power input portion 333 and is used to drive the power input portion 333 to rotate about a first axis parallel to the axis of the drive shaft 320. The power input portion 333 is configured to drive the power output portion 334 to rotate, and the power output portion 334 drives the bearing portion 331 to rotate about a second axis perpendicular to the first axis.

[0077] Specifically, the rotation axis of the power input unit 333 is parallel to the bearing surface of the bearing unit 331 and also parallel to the axial direction of the transmission shaft 320. Conversely, the rotation axis of the power output unit 334 is perpendicular to the bearing surface of the bearing unit 331 and also perpendicular to the axial direction of the transmission shaft 320. By providing the power input unit 333 and the power output unit 334, the torsional force input from the transmission shaft 320 is converted into a torsional torque perpendicular to it in another direction. This enables the rotational reversal function of the bearing unit 331 and facilitates the rational arrangement of the relative positions and connection methods of the rotating bearing assembly 330 and the power assembly 310.

[0078] In some embodiments, the magnitude of the torsional torque can be controlled by controlling the output power of the power assembly 310. The rotation angle of the bearing portion 331 can be controlled by controlling the rotation angle of the drive shaft 320. For example, the bearing portion 331 can be rotated 180 degrees, thereby causing the rotating hopper 20 carried by the bearing portion 331 to rotate 180 degrees in the horizontal direction, realizing the switching of the rotating hopper 20 between the receiving position and the shearing feeding position, as well as the reversal of the spent fuel assembly within the rotating hopper 20.

[0079] In some embodiments, the power output part 334 is fixedly connected to the support part 331, so that the support part 331 and the power output part 334 can rotate synchronously. The fixed connection method between the power output part 334 and the support part 331 includes, but is not limited to, interference fit, key connection, etc.

[0080] like Figure 6 As shown, the power input section 333 is partially disposed outside the main body section 332, and the other part is disposed inside the main body section 332. One end of the power input section 333 extending out of the main body section 332 is connected to the drive shaft 320, thereby providing power to the power input section 333.

[0081] like Figure 7 As shown, in some embodiments, the power input part 333 is a worm gear, and the power output part 334 is a worm wheel, with the worm gear meshing with the worm wheel. For example... Figure 8 As shown, the power assembly 310 drives the transmission shaft 320 to rotate, which in turn drives the worm gear to rotate. The rotation of the worm gear drives the worm wheel to rotate, which in turn drives the entire bearing section 331 to rotate. The worm gear structure has high precision, enabling accurate control of the rotation angle, and is highly reliable and not easily damaged. Furthermore, the worm gear structure has a speed reduction effect, preventing the bearing section 331 from rotating excessively due to inertia, thus achieving stable control of the rotation of the bearing section 331.

[0082] Furthermore, the drive shaft 320 can drive the power input unit 333 and the power output unit 334 to rotate forward or in reverse, thereby enabling the bearing unit 331 to rotate both forward and in reverse, so as to realize the switching of the rotating hopper 20 between the receiving position and the shearing feeding position.

[0083] like Figure 6 As shown, in some embodiments, the body portion 332 can be a box structure, and the body portion 332 has space to accommodate other components. For example, the power input portion 333 and the power output portion 334 can be disposed inside the body portion 332.

[0084] like Figure 7 As shown, in some embodiments, the rotating bearing assembly 330 further includes a support portion 336, which is disposed between the bearing portion 331 and the body portion 332, such that the bearing portion 331 is rotatably supported by the support portion 336, and the support portion 336 can stably support the bearing portion 331. Optionally, the support portion 336 can be a slewing bearing capable of withstanding large axial and radial loads and overturning moments.

[0085] In some embodiments, the support portion 331 and the body portion 332 are sealed together, the support portion 331 is rotatable relative to the body portion 332 and the connection is sealed, preventing contamination of the structure inside the body portion 332. Further, as... Figure 6 As shown, the main body 332 is provided with an air inlet pipe 3320, which is used to supply gas into the main body 332, so that the main body 332 can maintain a positive pressure against the outside, thereby effectively preventing external dust and other impurities from entering the main body 332, and further ensuring the seal between the support part 331 and the main body 332. For example, the air inlet pipe 3320 can be provided on the side of the main body 332.

[0086] like Figure 3 As shown, in some embodiments, the rotary switching device 300 further includes a coupling 340, which is connected between the power input unit 333 and the drive shaft 320 to compensate for radial and axial errors between the power input unit 333 and the drive shaft 320.

[0087] like Figure 9 As shown, the coupling 340 in this embodiment includes a coupling body 341 and a drive assembly. The end of the drive shaft 320 away from the power assembly 310 is detachably connected to one end of the coupling body 341, and the power input unit 333 is connected to the other end of the coupling body 341. The drive assembly is connected to the coupling body 341 and is used to drive the coupling body 341 to move axially along the drive shaft 320, so that the drive shaft 320 is connected to or disconnected from the coupling body 341.

[0088] In this embodiment, the drive assembly drives the coupling body 341 to move axially along the drive shaft 320, allowing the drive shaft 320 to quickly disengage from the coupling body 341. This enables rapid disassembly of the drive shaft 320 and the coupling 340, facilitating the removal of the drive shaft 320 or the rotating load-bearing assembly 330. Furthermore, the drive shaft 320 can be inserted into the coupling body 341, enabling rapid installation between the drive shaft 320 and the coupling 340. By providing the coupling 340, this embodiment allows for rapid connection and disconnection between the drive shaft 320 and the power input section 333 of the rotating load-bearing assembly 330.

[0089] like Figure 9 As shown, in some embodiments, the drive assembly includes a support member 342, a swing member 343, a connecting shaft 344, and a sliding member 345. The support member 342 is fixed to the rotary bearing assembly 330; for example, the support member 342 can be fixed to the side of the body portion 332. The support member 342 is provided with a first limiting hole 346 and a second limiting hole 347. One end of the swing member 343 is inserted into the first limiting hole 346 or the second limiting hole 347, and the other end of the swing member 343 is connected to the connecting shaft 344. The connecting shaft 344 is rotatably mounted on the support member 342 and is perpendicular to the drive shaft 320. One end of the sliding member 345 is connected to the connecting shaft 344, and the other end of the sliding member 345 is slidably connected to the coupling body 341.

[0090] Among them, such as Figure 10 As shown, when the swing member 343 is positioned in the first limiting hole 346, the coupling body 341 is connected to the drive shaft 320; as Figure 11 As shown, when the swing member 343 is positioned in the second limiting hole 347, the drive shaft 320 disengages from the coupling body 341, allowing for the disassembly of the drive shaft 320 or the rotating bearing assembly 330. When the swing member 343 swings between the first limiting hole 346 and the second limiting hole 347, it drives the connecting shaft 344 and the sliding member 345 to rotate around the axis of the connecting shaft 344. When the sliding member 345 rotates, it drives the coupling body 341 to move axially along the drive shaft 320, thereby achieving the connection and disconnection between the drive shaft 320 and the coupling body 341.

[0091] In some embodiments, a limiting block 348 is provided on the support member 342. The limiting block 348 is used to limit the swinging member 343 from swinging between the first limiting hole 346 and the second limiting hole 347, so as to prevent the swinging member 343 from swinging excessively and causing excessive movement of the coupling body 341, which would affect the transmission shaft 320 or the power input part 333. Specifically, two limiting blocks 348 are provided on the support member 342 to limit the swing angle of the swinging member 343 so that the swinging member 343 swings between the first limiting hole 346 and the second limiting hole 347.

[0092] In some embodiments, the swing member 343 can be remotely controlled to swing between the first limiting hole 346 and the second limiting hole 347, thereby enabling quick installation and disassembly between the coupling 340 and the drive shaft 320. Specifically, as shown... Figure 9 As shown, the swing member 343 is provided with an operating part 3431 at the end away from the connecting shaft 344. The operating part 3431 facilitates remote operation by the robot arm, thereby realizing quick assembly and disassembly between the transmission shaft 320 and the rotating bearing assembly 330.

[0093] When the coupling 340 is in operation, the swing member 343 is inserted into the first limiting hole 346, thereby restricting the position of the coupling body 341 and preventing the coupling body 341 from moving and disconnecting from the drive shaft 320 during the operation of the rotation switching device 300. When disassembly is required, the manipulator can be operated to move the operating part 3431 upward to pull the swing member 343 out of the first positioning hole, releasing the limiting of the coupling 340. Then, the manipulator can push the swing member 343 to move it and insert it into the second limiting hole 347, thereby driving the coupling body 341 to move axially along the drive shaft 320 to disconnect the connection between the drive shaft 320 and the coupling body 341. Conversely, moving the swing member 343 and inserting it into the first limiting hole 346 can achieve a quick connection between the coupling 340 and the drive shaft 320.

[0094] In some embodiments, a connecting cylinder is provided on the support member 342, and a connecting shaft 344 is rotatably disposed within the connecting cylinder, thereby enabling the connecting shaft 344 to rotate relative to the support member 342. A bearing is provided between the connecting shaft 344 and the connecting cylinder to support the rotation of the connecting shaft 344 within the connecting cylinder.

[0095] like Figure 9 As shown, in some embodiments, the coupling body 341 is cylindrical, and its interior forms a receiving space for accommodating the drive shaft 320 and the power input part 333. The drive shaft 320 is inserted into the coupling body 341 from one end, and the power input part 333 is inserted into the coupling body 341 from the other end, thereby realizing the transmission connection between the drive shaft 320 and the power input part 333.

[0096] In some embodiments, the inner surface of the coupling body 341 is provided with a toothed portion 3411, in which multiple teeth are arranged circumferentially along the coupling body 341 and each tooth extends axially along the coupling body 341. Both ends of the coupling body 341 are provided with toothed portions 3411, and the ends of the drive shaft 320 and the power input portion 333 are provided with toothed mating portions that mesh with the toothed portions 3411. Through the meshing of the toothed portions 3411 and the toothed mating portions, the connection and transmission between the coupling body 341 and the drive shaft 320 and the power input portion 333 are realized. In some embodiments, the coupling body 341 is a drum-shaped toothed sleeve.

[0097] When the coupling body 341 moves axially along the drive shaft 320, the drive shaft 320 can be inserted into the coupling body 341 and mesh with the toothed portion 3411, thereby enabling the drive shaft 320 to drive the coupling body 341 to rotate. Simultaneously, the power input portion 333 is connected to the coupling body 341 and meshes with the toothed portion 3411 at the other end of the coupling body 341, so that when the coupling body 341 rotates, it drives the power input portion 333 to rotate, thus realizing the transmission of power.

[0098] like Figure 9 As shown, in some embodiments, a sliding groove 3412 is provided on the coupling body 341, and the sliding groove 3412 is arranged along the circumferential direction of the coupling body 341. A sliding member 345 is slidably connected in the sliding groove 3412, and the sliding member 345 surrounds a portion of the coupling body 341. Specifically, when the swing member 343 swings between the first limiting hole 346 and the second limiting hole 347 and drives the sliding member 345 to rotate, the sliding member 345 slides in the sliding groove 3412 to counteract the movement of the sliding member 345 in the radial direction of the transmission shaft 320, thereby driving the coupling body 341 to move axially along the transmission shaft 320; when the transmission shaft 320 drives the coupling body 341 and the power input part 333 to rotate, the sliding member 345 slides in the sliding groove 3412 to make the coupling body 341 rotate relative to the sliding member 345.

[0099] In some embodiments, the swing member 343 is perpendicular to the connecting shaft 344, and the connecting shaft 344 is perpendicular to the transmission shaft 320. Specifically, the connecting shaft 344 is perpendicular to the bearing surface of the bearing portion 331. When one end of the swing member 343 moves between the first limiting hole 346 and the second limiting hole, it makes a circular motion around the axis of the connecting shaft 344, and at the same time drives the connecting shaft 344 to rotate. When the connecting shaft 344 rotates, it drives the sliding member 345 connected to it to make a circular motion around the axis of the connecting shaft 344, so that the end of the sliding member 345 slides in the sliding groove 3412, and at the same time moves along the axial direction of the transmission shaft 320, thereby driving the coupling body 341 to move along the axial direction of the transmission shaft 320, so as to avoid the sliding member 345 driving the coupling body 341 to move radially, causing the coupling body 341 to get stuck and unable to move.

[0100] For example, the slider 345 can be a fork structure, which includes a connecting rod and a C-shaped member. The connecting rod connects the connecting shaft 344 and the C-shaped member. The C-shaped member surrounds the coupling body 341, and its end is disposed within a sliding groove 3412, allowing it to slide within the sliding groove 3412. Furthermore, there is a gap between the end of the C-shaped member and the surface of the sliding groove 3412, thereby allowing the C-shaped member to slide smoothly within the sliding groove 3412.

[0101] In some embodiments, a limiting portion is provided on the rotating bearing assembly 330 to fix the rotating hopper 20 and prevent the rotating hopper 20 from moving on the rotating bearing assembly 330. Specifically, the limiting portion is provided on the bearing portion 331 to fix the rotating hopper 20 to the bearing portion 331.

[0102] like Figure 12 and 13 As shown, the rotating hopper 20 includes a hopper body 210 and a mounting plate 220. The hopper body 210 is used to accommodate spent fuel assemblies, and the mounting plate 220 is fixed to both sides of the hopper body 210. Figure 14 As shown, the mounting plate 220 cooperates with the limiting part to limit the position of the hopper body 210 on the rotating bearing assembly 330.

[0103] like Figure 6As shown, in some embodiments, the limiting portion includes a plurality of first limiting portions 3381 and a plurality of second limiting portions 3382. The plurality of first limiting portions 3381 are arranged on both sides of the mounting plate 220 along a first direction, for fixing the position of the rotating hopper 20 in the first direction. The plurality of second limiting portions 3382 are arranged on both sides of the mounting plate 220 along a second direction, for fixing the position of the rotating hopper 20 in the second direction, thereby ensuring that the rotating hopper 20 remains in a stable position relative to the support portion 331 when the support portion 331 rotates, so that the rotating hopper 20 rotates synchronously with the support portion 331. The first direction is the extending direction of the rotating hopper 20, and the second direction is perpendicular to the extending direction of the rotating hopper 20.

[0104] In some descriptions, a groove 221 is provided on the mounting plate 220 at a position corresponding to the limiting part, and the limiting part is located in the groove 221, thereby limiting the position of the rotating hopper 20.

[0105] In some embodiments, the rotation of the spent fuel assembly can be achieved by eccentric rotation, which can reduce the footprint of the feeding hot chamber 3 and save space.

[0106] like Figure 3 As shown, in some embodiments, the rotating hopper 20 is supported on one side of the rotation axis of the support portion 331. When the support portion 331 rotates 180 degrees around its rotation axis, the rotating hopper 20 rotates eccentrically relative to the center of the support portion 331, so that the rotating hopper 20 is parallel to the original extension direction of the rotating hopper 20 after the eccentric rotation, thereby enabling the rotating hopper 20 to rotate to the receiving position or the shearing and feeding position.

[0107] like Figure 15 As shown, when the rotating bearing assembly 330 drives the rotating hopper 20 to rotate to the receiving position, the rotating hopper 20 docks with the first transition chamber 31, so that the feeding device 13 of the feeding hot chamber 2 sends the spent fuel assembly to the rotating hopper 20 through the first transition chamber 31.

[0108] like Figure 16 As shown, after the rotating bearing assembly 330 drives the rotating hopper 20 to rotate eccentrically by 180°, the rotating hopper 20 is in the shearing and feeding position. At this time, the rotating hopper 20 is parallel to the first transition hopper 31, and its two ends are respectively connected to the pushing device 100 and the second transition hopper 32. The pushing device 100 pushes the spent fuel assembly in the rotating hopper 20 to move into the second transition hopper 32, and then pushes the spent fuel assembly through the second transition hopper 32 into the shearing device 50 to realize the horizontal feeding of the spent fuel assembly.

[0109] like Figure 12 and Figure 13 As shown, in some embodiments, the rotary hopper 20 is provided with a positioning port 212. For example... Figure 17As shown, the feeding system 40 also includes a snap-fit ​​assembly 500, which is mounted on the rotating hopper 20 and located at the positioning port 212. The snap-fit ​​assembly 500 can rotate with the rotating hopper 20. The snap-fit ​​assembly 500 is configured to be inserted into the rotating hopper 20 via the positioning port 212 and cooperate with the spent fuel assembly. It is used to limit the position of the spent fuel assembly within the rotating hopper 20 when the rotating hopper 20 rotates, preventing the spent fuel assembly from sliding during rotation or during an earthquake, and also preventing the spent fuel assembly from being accidentally pulled back by the pusher gripper of the pusher device 13.

[0110] like Figure 18 As shown, in some embodiments, the snap-fit ​​assembly 500 includes a snap-fit ​​mounting portion 510, a snap-fit ​​portion 530, and a snap-fit ​​driving portion 520. The snap-fit ​​mounting portion 510 is mounted on the rotating hopper 20, and has a receiving space within it. An opening is provided at the bottom of the snap-fit ​​mounting portion 510, corresponding to the position of the positioning port 212. The snap-fit ​​portion 530 is movably disposed within the receiving space and matches the spent fuel assembly. The snap-fit ​​driving portion 520 is disposed on the snap-fit ​​mounting portion 510 and connected to the snap-fit ​​portion 530. The snap-fit ​​driving portion 520 is used to drive the snap-fit ​​portion 530 to move up and down.

[0111] Among them, such as Figure 18 As shown, when the rotary hopper 20 rotates, the snap fastener 530 is configured to descend into the rotary hopper 20 via the opening and positioning port 212 and press against the spent fuel assembly to limit the spent fuel assembly and prevent it from shifting during rotation. When the rotary hopper 20 rotates to the correct position, for example, when the rotary hopper 20 rotates to the shearing feeding position, the snap fastener 530 rises into the receiving space of the snap fastener mounting part 510 to release the limitation on the spent fuel assembly, so as to facilitate the pushing of the spent fuel assembly into the rotary hopper 20 and push the spent fuel assembly into the shearing device 50.

[0112] like Figure 18 As shown, in some embodiments, the snap fastener 530 is a pressure plate with a limiting groove 531. The limiting groove 531 matches the spent fuel assembly, so that when the snap fastener 530 descends into the rotating hopper 20, the spent fuel assembly can be pressed into the limiting groove 531 to prevent the spent fuel assembly from sliding or moving during rotation or earthquake, thus ensuring safety.

[0113] like Figure 18As shown, in some embodiments, the snap-fit ​​drive unit 520 is a cylinder, and the snap-fit ​​drive unit 520 is provided with an air intake pipe 521 for supplying gas to the cylinder. For example, the cylinder is provided with two air intake pipes 521, which can be respectively arranged on both sides of the piston of the cylinder, and the cylinder is supplied with gas from the two air intake pipes 521 respectively, so that the cylinder can output power from two opposite directions, thereby driving the snap-fit ​​unit 530 to rise and fall.

[0114] In some embodiments, such as Figure 7 As shown, the rotating support assembly 330 also includes an air supply pipe 339, which is disposed within the body portion 332. The air supply pipe 339 has an inlet 3391 located on the body portion 332 for connection to an air source, and an outlet 3392 located on the support portion 331 for connection to a snap-fit ​​drive portion 520 to supply the gas required for driving the snap-fit ​​drive portion 520. In some embodiments, the air supply pipe 339 has its inlet 3391 located on the side of the body portion 332, and its outlet 3392 located at the rotation center of the support portion 331. Furthermore, the air supply pipe 339 is rotatably connected to the support portion 331, so that the outlet of the air supply pipe 339 does not rotate when the support portion 331 rotates.

[0115] In this embodiment, the air supply pipe 339 is disposed inside the main body 332, so that when the bearing part 331 and the rotating hopper 20 and the snap fastening assembly 500 carried by the bearing part 331 rotate, the air supply pipe 339 will not rotate, and the connecting pipe between the air supply pipe 339 and the snap fastening drive part 520 can make a circular motion with the air outlet 3392 of the air supply pipe 339 as the center. The connecting pipe between the air source and the air supply pipe 339 will not be displaced, thus avoiding the connecting pipe from moving and getting tangled when the snap fastening assembly 500 moves with the rotating hopper 20, or even affecting the rotation of the rotating hopper 20.

[0116] In some embodiments, the main body 332 is provided with two air supply pipes 339, which are respectively connected to two air inlet pipes 521 of the snap fastener drive unit 520, thereby supplying air to the cylinder, which serves as the snap fastener drive unit 520, from different directions to drive the snap fastener 530 to rise and fall.

[0117] In some embodiments, the mounting plate 220 is provided with a clearance groove 222, the position of which corresponds to the air outlet 3392 of the air supply pipe 339. The air outlet 3392 is located in the clearance groove 222, so that the air supply pipe 339 does not rotate when the bearing part 331 and the rotating hopper 20 rotate.

[0118] like Figure 19 and Figure 20As shown, in some embodiments, the pushing device 100 may include a pushing bin 110, a power assembly 120, a drive shaft 130, a chain assembly 140, and a pushing assembly 150. The pushing bin 110 is located at the end of the rotating bin 20 away from the shearing device 50. The pushing bin 110 is parallel to one side of the first transition bin 31, and corresponds to the second transition bin 32, with their center lines coinciding. This facilitates pushing the spent fuel assembly in the rotating bin 20 to the shearing device 50 via the second transition bin 32. The rotating bin 20 is configured such that when in the shearing feeding position, both ends are sealed to the pushing bin 110 and the second transition bin 32, respectively. One end of the drive shaft 130 is connected to the power assembly 120, which drives the drive shaft 130 to rotate. The chain assembly 140 is driven to the other end of the drive shaft 130, which drives the chain assembly 140 to reciprocate. The push assembly 150 is disposed in the push hopper 110 and is connected to the chain assembly 140. The chain assembly 140 is used to drive the push assembly 150 to move within the push hopper 110 and the rotating hopper 20, so as to push the spent fuel assembly in the rotating hopper 20 to the shearing device 50.

[0119] In this embodiment of the invention, when the rotating hopper 20 is connected to the pushing hopper 110, the power component 120 drives the chain component 140 to move in the pushing hopper 110 and the rotating hopper 20, thereby driving the pushing component 150 to move, which in turn pushes the spent fuel assembly in the rotating hopper 20 to move, so that the spent fuel assembly can enter the shear heat chamber 4 from the second transition chamber 32, thus realizing the horizontal pushing of the spent fuel assembly.

[0120] In some embodiments, in step S600, the shearing process is carried out in a closed environment of the shearing device, and airflow is controlled and the spent fuel assembly is cooled to prevent the radioactive products after shearing from entering the preceding steps.

[0121] To ensure that the shearing device 50 is in a sealed environment during shearing, such as Figure 17 and Figure 19 As shown, in some embodiments, the feeding system 40 further includes an inflatable sealing assembly 800, which is connected to one end of the second transition chamber 32 located in the feeding hot chamber 3. The inflatable sealing assembly 800 is configured to be inflatable and is used to seal the connection between the second transition chamber 32 and the rotating hopper 20. In some embodiments, the inflatable sealing assembly 800 is connected to one end of the push hopper 110 near the rotating hopper 20, and is used to seal the connection between the push hopper 110 and the rotating hopper 20.

[0122] When the rotating hopper 20 rotates, the inflatable sealing assembly 800 deflates, creating a gap between the pushing hopper 110 and / or the second transition hopper 32 and the rotating hopper 20, providing space for the rotation of the rotating hopper 20. When both ends of the rotating hopper 20 are connected to the pushing hopper 110 and the second transition hopper 32 respectively, the inflatable sealing assembly 800 inflates to seal the connection between the rotating hopper 20 and the pushing hopper 110, and between the rotating hopper 20 and the second transition hopper 32. Simultaneously, since the other end of the pushing hopper 110 is closed, the second transition hopper 32 is sealed to the shearing device 50, thereby forming a sealed boundary between the pushing device 100, the rotating hopper 20, the second transition hopper 32, and the shearing device 50, ensuring that the shearing device 50 is in a closed environment during the feeding and shearing process.

[0123] like Figure 21 As shown, in some embodiments, the inflatable sealing assembly 800 includes a sealing mounting portion 810 and an inflatable pad 820. The sealing mounting portion 810 is connected to the end of the push hopper 110 or the second transition chamber 32, and the inflatable pad 820 is connected to the side of the sealing mounting portion 810 away from the push hopper 110 or the second transition chamber 32, and the inflatable pad 820 faces the rotating hopper 20. Both the sealing mounting portion 810 and the inflatable pad 820 are annular and match the rotating hopper 20. The inflatable pad 820 forms a channel 821, which matches the spent fuel assembly. Thus, when the rotating hopper 20 is docked with the push hopper 110 and the second transition chamber 32, the rotating hopper 20 can communicate with the push hopper 110 and the second transition chamber 32, facilitating the movement of the push assembly in the push hopper 110 to the rotating hopper 20 and the pushing of the spent fuel assembly in the rotating hopper 20 to the second transition chamber 32 via the channel 821.

[0124] In some embodiments, the sealing mounting part 810 is provided with an inflation port 830, which is connected to the inflation pad 820 to realize the inflation and deflation of the inflation pad 820. When the rotating hopper 20 rotates to the shearing feeding position, both ends of the rotating hopper 20 are respectively connected to the push hopper 110 and the second transition hopper 32. At this time, the inflation pad 820 is inflated through the inflation port 830 to fill the gap between the rotating hopper 20 and the push hopper 110 / second transition hopper 32, ensuring that the feeding channel between the rotating hopper 20 and the push hopper 110 / second transition hopper 32 is sealed and preventing dust leakage. When the rotating hopper 20 starts to rotate, the inflation pad 820 deflates and retracts, thereby providing space for the rotation of the rotating hopper 20.

[0125] like Figure 22 As shown, the end of the push hopper 110 and the second transition hopper 32 is provided with a connecting flange 722. The connecting flange 722 is provided with an installation groove. The inflatable sealing assembly 800 is installed in the installation groove, thereby realizing the installation and fixation of the inflatable sealing assembly 800.

[0126] To control airflow and cool spent fuel assemblies, and to prevent sheared radioactive products from entering subsequent processes. For example... Figure 19 As shown, in some embodiments, the feeding system 40 further includes an air intake assembly 600, which is disposed in the push hopper 110. The air intake assembly 600 is used to introduce air into the push hopper 110, thereby blowing the airflow from the push hopper 110 through the rotating hopper 20 to the shearing device 50, preventing dust generated in the shearing device 50 during the shearing process from entering the feeding system 40. In this embodiment, when the rotating hopper 20 rotates to the shearing feeding position, the rotating hopper 20 is connected to the push hopper 110, and the air intake assembly can introduce air into the push hopper 110, so that the airflow flows in the direction of the push hopper 110, the rotating hopper 20, and the shearing device 50, preventing dust in the shearing device 50 from entering the feeding system 40 with the airflow, and at the same time, it can cool the spent fuel assembly.

[0127] like Figure 23 and Figure 24 As shown, in some embodiments, the air intake assembly 600 includes an air intake pipe 610 and a liquid seal structure 620. The air intake pipe 610 is connected to the push hopper 110 and is used to intake air into the push hopper 110. The liquid seal structure 620 is disposed outside the air intake pipe 610 and stores a sealing liquid inside the liquid seal structure 620 to seal the air intake pipe 610 and the push hopper 110, so that the gas in the air intake pipe 610 can only flow into the push hopper 110.

[0128] like Figure 24 As shown, in some embodiments, the liquid seal structure 620 includes an outer sleeve 621 and an inner sleeve 622. The inner sleeve 622 is connected to and communicates with the pusher hopper 110. The outer sleeve 621 is sleeved outside the inner sleeve 622, with the bottom of the outer sleeve 621 closed and the bottom of the inner sleeve 622 having an opening, thereby allowing the outer sleeve 621 and the inner sleeve 622 to communicate through the bottom opening. An air inlet pipe 610 is fixed in the inner sleeve 622, with an outlet at the top of the air inlet pipe 610 located within the inner sleeve 622 and an inlet at the bottom of the air inlet pipe 610 located outside the outer sleeve 621.

[0129] The sealing liquid is stored in the outer sleeve 621 and the inner sleeve 622, and the liquid level of the sealing liquid does not exceed the outlet of the air inlet pipe 610, so that the gas entering the air inlet pipe 610 can only enter the push hopper 110 through its top opening and the top of the inner sleeve 622. In some embodiments, the sealing liquid is deionized water to avoid corrosion of the liquid seal structure 620.

[0130] In some embodiments, the liquid seal structure 620 further includes an inlet pipe 623 disposed within the outer sleeve 621, and the inlet pipe 623 is used to supply sealing liquid into the liquid seal structure 620. In some embodiments, the liquid seal structure 620 further includes an overflow pipe 624 disposed within the outer sleeve 621, and the overflow pipe 624 is located below the outlet of the air inlet pipe 610, ensuring that an appropriate amount of sealing liquid is stored in the liquid seal device, while preventing the liquid level of the sealing liquid from exceeding the outlet of the air inlet pipe 610 and blocking the air inlet pipe 610.

[0131] In some embodiments, the power assembly 120 is the same as the power assembly 310 in the rotary switching device 300, and will not be described again here. In some embodiments, the drive shaft 130 is the same as the drive shaft 320 in the rotary switching device 300, and will not be described again here.

[0132] In some embodiments, the power assembly 120 is disposed outside the feeding hot chamber 3, thereby preventing the power assembly 120 from being affected by radioactive radiation and thus its normal operation. Further, the drive shaft 130 passes through the wall of the feeding hot chamber 3, thereby transmitting the power provided by the power assembly 120 outside the feeding hot chamber 3 to the chain assembly 140 inside the feeding hot chamber.

[0133] In some embodiments, the power assembly 310 and drive shaft 320 of the rotary switching device 300 and the power assembly 120 and drive shaft 130 of the pushing device 100 are arranged on the same side of the pushing bin 110 and the rotating bin 20, so that the components are arranged compactly, thereby reducing the area occupied by the feeding system 40.

[0134] like Figure 19 , Figure 25 and Figure 26 As shown, in some embodiments, the chain assembly 140 includes a chain box 141, a sprocket 142, and a chain 143. A pusher bin 110 is mounted on the chain box 141 and is connected to it. The sprocket 142 is disposed within the pusher bin 110 and is connected to a drive shaft 130, which drives the sprocket 142 to rotate. The chain 143 is movably disposed within the chain box 141, with one end connected to a pusher assembly 150 within the pusher bin 110. The chain 143 cooperates with the sprocket 142, such that rotation of the sprocket 142 drives the chain 143 to move, thereby moving the pusher assembly 150. The movement of the pusher assembly 150 pushes the spent fuel assembly within the rotating hopper 20, thus achieving the pushing of the spent fuel assembly.

[0135] In some embodiments, the sprocket 142 includes a sprocket shaft 1421 and a sprocket body 1422. The sprocket shaft 1421 is connected to a drive shaft 130, which drives the sprocket shaft 1421 to rotate. The sprocket body 1422 is sleeved outside the sprocket shaft 1421, and the sprocket shaft 1421 drives the sprocket body 1422 to rotate. The sprocket body 1422 cooperates with a chain 143, and the rotation of the sprocket body 1422 drives the chain 143 to move.

[0136] like Figure 19 and Figure 20 As shown, in some embodiments, the pushing device 100 further includes a coupling 160, which is connected between the sprocket 142 of the chain assembly 140 and the drive shaft 130 to compensate for radial and axial errors between the sprocket 142 and the drive shaft 130. In some embodiments, the coupling 160 is the same as the coupling 340 of the rotation switching device 300, and will not be described again here.

[0137] like Figure 26 As shown, in some embodiments, the sprocket 142 is provided with a plurality of receiving grooves 1423, which are evenly distributed along the circumference of the sprocket 142. The pin of the chain 143 engages with the receiving groove 1423, so that the rotation of the sprocket 142 can drive the chain 143 to move. In some embodiments, the receiving groove 1423 is provided in the sprocket body 1422. When the sprocket 142 rotates, the pin located in the receiving groove 1423 moves with the rotation of the sprocket 142, thereby driving the chain 143 to move; at the same time, the movement of the chain 143 can drive the subsequent pin into the receiving groove 1423 of the sprocket 142, so that the chain 143 can move continuously. In addition, the inner surface of the receiving groove 1423 is inclined to facilitate the entry of the pin into the receiving groove 1423.

[0138] In some embodiments, the chain box 141 is provided with a track inside, and the chain 143 is disposed on the track and can move along the track.

[0139] like Figure 25 and Figure 26 As shown, in some embodiments, the pushing assembly 150 includes a pushing connection portion 151 and a pushing portion 152. The pushing connection portion 151 is disposed within the pushing hopper 110 and is connected to the chain 143 of the chain assembly 140. The chain 143 is used to drive the pushing connection portion 151 to move within the pushing hopper 110 and the rotating hopper 20. The pushing portion 152 is detachably connected to the pushing connection portion 151, and the pushing connection portion 151 is configured to push the pushing portion 152 to move. The pushing portion 152 is used to push the spent fuel assembly. In this embodiment, pushing the spent fuel assembly through the pushing portion 152 facilitates applying a pushing force to the spent fuel assembly, causing the spent fuel assembly to move.

[0140] In some embodiments, such as Figure 27 As shown, the end of the push connection 151 away from the chain 143 is provided with a connecting protrusion 1511, such as... Figure 28 As shown, the pusher 152 is provided with a connecting groove 1521, and the connecting protrusion 1511 cooperates with the connecting groove 1521 so that the pusher connecting part 151 and the pusher 152 can be detachably connected, thereby realizing quick assembly and disassembly of the pusher connecting part 151 and the pusher 152, and facilitating the replacement of the pusher 152.

[0141] In some operating conditions, such as when the shearing device malfunctions, it is necessary to remove the spent fuel assembly fed into the shearing device. In this case, the pusher 152 can be replaced with a gripper to hold the spent fuel assembly, so as to move the spent fuel assembly back into the rotary hopper 20. In this embodiment, the pusher 152 is easily replaced by quick assembly and disassembly of the pusher connection 151 and the pusher 152.

[0142] In some embodiments, the push connection 151 includes a push body 1512 and a connecting protrusion 1511, with the connecting protrusion 1511 disposed at the bottom of the push body 1512. Simultaneously, a connecting groove 1521 is disposed at the bottom of the push part 152, and the connecting protrusion 1511 matches the connecting groove 1521, with the connecting protrusion 1511 being accommodated within the connecting groove 1521, thereby allowing the push connection 151 and the push part 152 to be detachably connected. Furthermore, when the push part 152 needs to be replaced, it is not necessary to disassemble the push connection 151; simply lifting the push part 152 upwards allows for the detachment of the push connection 151 and the push part 152.

[0143] like Figure 27 and Figure 28 As shown, in some embodiments, the push connection portion 151 is provided with rollers 1513, and multiple rollers 1513 are symmetrically arranged on both sides of the push connection portion 151, thereby reducing friction during the movement of the push connection portion 151 and making its movement smoother. In some embodiments, the push portion 152 is also provided with rollers 1522, and multiple rollers 1522 are symmetrically arranged on both sides of the push portion 152.

[0144] like Figure 28As shown, in some embodiments, the pushing part 152 includes a moving part 1523, a connecting rod 1524, and a pusher head 1525. The moving part 1523 is detachably connected to the pushing connection part 151. A roller 1522 is disposed on the moving part 1523 to reduce friction between the pushing part 152 and the pushing hopper 110 or the rotating hopper 20. The connecting rod 1524 connects the moving part 1523 and the pusher head 1525 to fix the pusher head 1525 to the end of the moving part 1523 away from the pushing connection part 151. The pusher head 1525 is used to push the spent fuel assembly. In some embodiments, the pusher head 1525 is shaped to match the spent fuel assembly to uniformly transmit the pushing force to the spent fuel assembly, facilitating the movement of the spent fuel assembly in the rotating hopper 20.

[0145] like Figure 19 As shown, in some embodiments, the push hopper 110 is disposed on the chain box 141, and the bottom of the push hopper 110 is provided with a connection port for connecting the push hopper 110 and the chain box 141, so that the chain 143 can move into the push hopper 110 through the connection port. The end of the chain 143 that connects to the push assembly 150 is disposed inside the push hopper 110, so that the chain 143 and the push assembly 150 remain connected.

[0146] like Figure 26 As shown, in some embodiments, the pushing device 100 further includes a pushing limit detection element 170, which is disposed within the pushing hopper 110 and is used to detect whether the pushing component 150 has retracted into position. Figure 27 As shown, a limit detection trigger 1514 is provided on the push connection portion 151, and the push limit detection member 170 is configured to generate a positioning signal when it contacts the limit detection trigger 1514. Specifically, the limit detection trigger 1514 can be provided on the push connection portion 151, and the limit detection trigger 1514 can be a trigger protrusion protruding from the surface of the push connection portion 151.

[0147] In some embodiments, after the spent fuel assembly is fully pushed into the shearing device, the chain 143 and the pushing assembly 150 return to their initial positions, and the pushing limit detection element 170 is used to detect whether the pushing assembly 150 has returned to its position. In some embodiments, the pushing limit detection element 170 can be a pneumatic sensor. When the limit detection trigger 1514 on the pushing assembly 150 collides with the pneumatic sensor in the pushing hopper 110, the pressure in the air path of the pneumatic sensor changes, thereby triggering the pushing limit detection element 170 to generate a positioning signal.

[0148] like Figure 26As shown, in some embodiments, a push limiter 180 is provided inside the push hopper 110. The push limiter 180 cooperates with the push assembly 150 to limit the backward position of the chain 143. In some embodiments, the push limiter 180 matches the push connection 151 to limit the push assembly 150 from continuing to move toward the sprocket 142, thereby limiting the extreme position of the chain 143's backward movement and preventing the chain 143 from completely retracting into the inner chain box 144. At the same time, the push limiter 180 can also provide a standard zero point for the stroke calibration of the power assembly 120, facilitating the calibration of the power assembly 120's stroke.

[0149] In some embodiments, the push limiter 180 can be a limit stop, which can cooperate with the push body 1512 of the push connection 151 to limit the extreme position of the push component 150's retraction. Figure 26 As shown, the pushing body 1512 is supported above the connecting protrusion 1511, and the pushing limiter 180 is located below the pushing body 1512. When the pushing component 150 retracts to its limit position, the connecting protrusion 1511 contacts the pushing limiter 180, and the pushing limiter 180 prevents the connecting protrusion 1511 from retracting, thereby limiting the chain 143 from continuing to retract.

[0150] In some embodiments, the shearing device 50 within the shearing hot chamber 4 can shear the spent fuel assembly. Step S600, which involves shearing the spent fuel assembly, includes steps S601 to S603.

[0151] S601: Cut off the first end and collect the cut-off first end, then clean it.

[0152] S602: Shear the spent fuel active section to a predetermined length.

[0153] S603: After shearing the spent fuel active section, collect the second end and clean it.

[0154] S604: Transfer the cleaned first and second ends to the processing heat chamber for further processing.

[0155] In this embodiment, the spent fuel assembly is cut in the order of the first end, the active segment, and the second end, and the first end, the active segment, and the second end are collected separately to facilitate different subsequent processing. Furthermore, in this embodiment, the active segment is cut to a predetermined length to facilitate subsequent dissolution processing.

[0156] In some embodiments, when shearing the spent fuel active segment in step S602, the value of the predetermined length can be determined according to the dissolution requirements, which is beneficial to control the dissolution rate when dissolving the spent fuel active segment and avoid the dissolution rate being too fast or too slow.

[0157] In some embodiments, the pushing distance of the feeding system 40 can be controlled so that the feeding system 40 pushes the first end or a spent fuel active segment of a predetermined length to the shearing position, so as to cut off the first end or cut the spent fuel active segment to a predetermined length. Specifically, the chain assembly 140 in the feeding system 40 can move in a stepping manner. By controlling the moving distance of the chain assembly 140, the pushing distance of the spent fuel assembly can be precisely controlled so that the spent fuel assembly can enter the shearing device 50 at a predetermined length, facilitating the cutting of the spent fuel active segment into a short segment of a predetermined length.

[0158] In some embodiments, in step S600, the spent fuel assembly is compressed horizontally for a predetermined length, and then horizontally sheared along that length. Compared to conventional pressurized water reactors where fuel rods are constrained by multiple grids in spent fuel assemblies, the stainless steel spent fuel assembly in this application is constrained only by grids at the bottom. By compressing the spent fuel assembly during shearing, leakage of the active portion of the spent fuel assembly from the outer casing can be prevented.

[0159] like Figure 29 and Figure 30 As shown, in some embodiments, the shearing device 50 within the shearing chamber 4 may include: a housing 410, a fixed blade assembly 420, a clamping assembly 430, and a movable blade assembly 440. The housing 410 has a feed inlet 4121, which is sealed to the second transition chamber 32. The fixed blade assembly 420 is fixed within the housing 410 and its shape matches that of the spent fuel assembly, serving to support the spent fuel assembly. The clamping assembly 430 is movably disposed within the housing 410, and is correspondingly disposed on both sides of the feed inlet 4121. The clamping assembly 430 is movable relative to the fixed blade assembly 420, serving to clamp the spent fuel assembly against the fixed blade assembly 420. The movable blade assembly 440 is movably disposed within the housing 410. The moving direction of the movable blade assembly 440 is parallel to the moving direction of the clamping assembly 430, and the movable blade assembly 440 is disposed parallel to the fixed blade assembly 420. When the movable blade assembly 440 moves toward the fixed blade assembly 420, the movable blade assembly 440 and the fixed blade assembly 420 cooperate to shear the spent fuel assembly.

[0160] In the shearing device 50 of this embodiment, the fixed blade assembly 420 is matched with the shape of the spent fuel assembly, so that the fixed blade assembly 420 can carry the spent fuel assembly and the spent fuel assembly is pressed into the fixed blade assembly 420 by the clamping assembly 430, thereby stably fixing the spent fuel assembly and preventing the spent fuel assembly from shifting during the shearing process, which facilitates the cooperation of the movable blade and the fixed blade to shear the spent fuel assembly.

[0161] like Figure 31 As shown, the feed inlet 4121 is located on the side of the housing 410, and the spent fuel assembly is horizontally fed into the shearing device 50. In some embodiments, the feed inlet 4121 matches the shape of the spent fuel assembly, and the spent fuel assembly moves along its axial direction and is fed into the housing 410 from the feed inlet 4121. The clamping assembly 430 and the fixed blade assembly 420 are arranged horizontally on both sides of the feed inlet 4121, and the moving direction of the clamping assembly 430 and the movable blade assembly 440 is perpendicular to the axial direction of the spent fuel assembly. This allows the spent fuel assembly to be clamped to the fixed blade assembly 420 by the clamping assembly 430 after it is fed into the housing 410, preventing displacement of the spent fuel assembly during the shearing process.

[0162] Furthermore, the fixed blade assembly 420 and the movable blade assembly 440 are arranged in parallel in the horizontal direction, and the movable blade assembly 440 is arranged on the side of the clamping assembly 430 away from the feed port 4121. The blade edge of the movable blade assembly 440 is opposite to the blade edge of the fixed blade assembly 420, so that the spent fuel assembly can be sheared when the movable blade assembly 440 moves toward the fixed blade assembly 420.

[0163] The shearing device 50 in this embodiment can perform horizontal shearing of spent fuel assemblies. Compared with traditional vertical shearing machines, it avoids the need to arrange moving and fixed blades in the vertical direction, and also avoids the possibility of uncut spent fuel assemblies falling during vertical feeding and shearing, thus improving the safety and reliability of spent fuel assembly shearing and increasing the processing efficiency of spent fuel assemblies.

[0164] like Figure 31 As shown, in some embodiments, the fixed blade assembly 420 includes a fixed blade mounting portion 421 and a fixed blade 422. The fixed blade mounting portion 421 is fixed inside the housing 410, and the fixed blade 422 is mounted on the fixed blade mounting portion 421. The blade edge of the fixed blade 422 is provided with a first receiving groove that matches the shape of the spent fuel assembly. The first receiving groove is used to receive at least a portion of the spent fuel assembly.

[0165] like Figure 31 As shown, a fixed blade support portion 414 is provided inside the housing 410. The fixed blade support portion 414 is fixed inside the housing 410, and a fixed blade receiving groove is provided on the fixed blade support portion 414. The fixed blade assembly 420 is installed in the fixed blade receiving groove. In some embodiments, the fixed blade support portion 414 is also provided with a spent fuel channel, which corresponds to the feed channel 412. When the spent fuel assembly is pushed into the spent fuel channel, the fixed blade assembly 420 can carry the spent fuel assembly to facilitate shearing it.

[0166] like Figure 31As shown, in some embodiments, the clamping assembly 430 includes a clamping moving part 432 and a clamping part 433. The clamping moving part 432 is disposed inside the housing 410, and is located on both sides of the feed inlet 4121 with the fixed blade assembly 420. The clamping part 433 is fixed to one end of the clamping moving part 432. The clamping moving part 432 is used to drive the clamping part 433 to move, and the clamping part 433 is used to clamp the spent fuel assembly into the fixed blade assembly 420. For example, the clamping part 433 corresponds to the first receiving groove of the fixed blade 422, so that the clamping part 433 can clamp the spent fuel assembly into the first receiving groove, thereby limiting the position of the spent fuel assembly.

[0167] like Figure 31 As shown, in some embodiments, the movable blade assembly 440 includes a movable blade mounting portion 442 and a movable blade 443. The movable blade mounting portion 442 is disposed within the housing 410, and the movable blade 443 is fixed to the movable blade mounting portion 442. The movable blade mounting portion 442 drives the movable blade 443 to move, and the movable blade 443 cooperates with the fixed blade 422 to shear the spent fuel assembly. The cutting edge of the movable blade 443 corresponds to the cutting edge of the fixed blade 422, thereby achieving the shearing of the spent fuel assembly.

[0168] like Figure 29 As shown, in some embodiments, the shearing device 50 may further include a hydraulic drive device 1200, which is connected to the clamping assembly 430 and the movable blade assembly 440 respectively, for driving the clamping assembly and the movable blade assembly 440 to move respectively. The hydraulic drive device 1200 is disposed outside the housing of the shearing device 50 to avoid contamination by dust generated during shearing inside the housing 410, and also to avoid being affected by nuclear radiation from spent fuel assemblies, ensuring the normal operation of both and improving the reliability of spent fuel assembly shearing.

[0169] like Figure 31 As shown, the hydraulic drive device 1200 includes two drive units 1201, which are respectively connected to the clamping assembly 430 and the movable blade assembly 440, so that the two drive units 1201 can be connected to the clamping moving part 432 and the movable blade mounting part 442 in the shearing device 50, respectively, to drive the clamping moving part 432 and the movable blade mounting part 442 to move, thereby realizing the clamping and shearing of the spent fuel assembly.

[0170] like Figure 29 As shown, in some embodiments, the shearing system may further include a base 30, and the housing 410 of the shearing device 50 is disposed on the base 30. The base 30 is used to support the shearing device 50 to ensure the stability of the operation of the shearing device 50.

[0171] like Figure 1As shown, in some embodiments, a shearing hot chamber 4 is provided with an end receiving container 60 for receiving the sheared first and second ends. The shearing hot chamber 4 is adjacent to the processing hot chamber 5 and the two are connected by a shielding door 41. The end receiving container 60 can be transferred to the processing hot chamber 5 through the shielding door 41 for processing of the first and second ends in the processing hot chamber 5.

[0172] Specifically, in step S601, after the first end is cut, the end receiving container 60 collects the cut-off first end; in step S603, after the spent fuel active section is cut, the end receiving container 60 collects the second end. After cleaning the collected first and second ends, in step S604, the end receiving container 60 is transferred to the processing hot chamber 5, thereby transferring the first and second ends to the processing hot chamber 5 for processing. Thus, the collection, cleaning, and transfer processing of the first and second ends are achieved.

[0173] In some embodiments, step S604 includes the following steps:

[0174] S6041: Transfer the first end and the second end to the heat treatment chamber 5;

[0175] S6042: Cut the second end to the predetermined length inside the heat treatment chamber 5;

[0176] S6043: Collect the cut second end and the first end, and then treat them as solid waste.

[0177] In this embodiment, the solid waste from spent fuel is radioactive, and the volume of solid waste that can be processed is limited. Furthermore, the length of the second end of the spent fuel assembly exceeds the length of the existing processing site. Therefore, in this embodiment, the second end is cut to facilitate subsequent solid waste processing.

[0178] like Figure 1 As shown, in some embodiments, an end-cutting device 70 is provided in the processing hot chamber 5. The end-cutting device 70 is used to cut the second end to a predetermined length.

[0179] like Figure 1 As shown, in some embodiments, the shearing device 50 is connected to the dissolver 80, specifically, they can be connected via a dissolver chute 81. In step S602, the spent fuel active segments sheared by the shearing device 50 can fall into the dissolver chute 81 and then into the dissolver 80 below, so as to facilitate subsequent dissolution processing of the sheared spent fuel fragments.

[0180] like Figure 31As shown, in some embodiments, the clamping assembly 430 and the movable blade assembly 440 are movably supported on the side wall of the housing 410, and the bottom of the housing 410 is formed with a discharge port for discharging the sheared first end, second end and spent fuel active segment for collection and subsequent processing.

[0181] like Figure 29 As shown, in some embodiments, the shearing system may further include a shear trap 1000, which is disposed below the shearing device 50, such as... Figure 32 As shown, a connection port 1010 is formed at the top of the shear trap 1000, which is sealed to the discharge port at the bottom of the housing 410. An outlet is formed at the bottom of the shear trap 1000, corresponding to the connection port 1010. The outlet is connected to the solvent 80 via a solvent chute 81. The spent fuel active segments sheared fall into the shear trap 1000 and are collected in the solvent 80.

[0182] In this embodiment, the connection port 1010 of the shear trap 1000 is sealed to the discharge port at the bottom of the housing 410 of the shearing device 50, thereby forming a closed space between the shear trap 1000 and the shearing device 50, preventing dust from spreading and spreading during shearing operations, effectively controlling the spread of dust within the limited shear trap space, and preventing dust from spreading to the outside.

[0183] like Figure 32 As shown, in some embodiments, the end receiving container 60 is movably disposed within the shear trap 1000. The end receiving container 60 is configured to move between a receiving station a and a cleaning and transfer station b, with the receiving station a located below the connection port and the cleaning and transfer station b located away from the connection port and the outlet. Wherein, as Figure 32 As shown, when the shearing device 50 shears the first end of the spent fuel assembly or after the spent fuel active section is sheared, the end receiving container 60 moves to receiving station a to receive the sheared first or second end; as Figure 33 As shown, when the shearing device 50 shears the spent fuel active segment, the end receiving container 60 moves to the cleaning and transfer station b so that the sheared spent fuel active segment is collected into the dissolver 80 through the outlet.

[0184] like Figure 34 As shown, in some embodiments, a liquid seal groove 1040 is formed at the edge of the connection port 1010 of the shear trap 1000, and the liquid seal groove 1040 is configured to contain a sealing liquid. A sealing plate is connected to the bottom of the discharge port of the shearing device 50, and the sealing plate is partially inserted into the liquid seal groove 1040 to seal the shear trap 1000 and the shearing device 50 to prevent dust from spreading to the outside.

[0185] like Figure 32As shown, the liquid seal tank 1040 is square and annular, with a through hole at the center for connecting the shearing device 50 and the shear trap 1000. The tank contains water to liquid seal the connection between the shearing device 50 and the shear trap 1000.

[0186] like Figure 32 and Figure 33 As shown, the shear trap 1000 in this embodiment includes a receiving portion 1030, a first shear trap 1050, and a second shear trap 1060. An end-receiving container 60 is movably disposed in the receiving portion 1030. Both the first shear trap 1050 and the second shear trap 1060 are connected to the bottom of the receiving portion 1030 and communicate with it. The first shear trap 1050 is correspondingly disposed with the connection port 1010, and the discharge port 1070 is disposed at the bottom of the first shear trap 1050 for docking with the dissolver chute 81, thereby transferring the spent fuel active segment sheared by the shearing device 50 to the dissolver 80. The second shear trap 1060 is disposed at the cleaning and transfer station b for collecting wastewater after rinsing the first and second ends.

[0187] like Figure 32 and Figure 33 As shown, in this embodiment, the first shear trap 1050 is funnel-shaped, and a liquid seal pipe 1051 is connected to the bottom of the first shear trap 1050. The liquid seal pipe 1051 is used to dock with the dissolver chute 81, thereby achieving a sealed connection between the shear trap 1050 and the dissolver chute 81, forming a closed space between the shearing device 50 and the dissolver 80 to prevent dust diffusion. In this embodiment, the first shear trap 1050 is set in a funnel shape, so that spent fuel active segments falling to any position in the first shear trap 1050 can easily slide into the dissolver 80 below, facilitating the collection of spent fuel active segments.

[0188] In this embodiment, when the shearing device 50 shears the first end, the end receiving container 60 is located at the receiving station b. At this time, the sheared first end falls and is collected in the end receiving container 60. After receiving, the end receiving container 60 moves to the cleaning and transfer station b. When the shearing device 50 shears the spent fuel active segment, the end receiving container 60 is located at the cleaning and transfer station b. At this time, the sheared spent fuel active segment can fall into the first shear trap 1050 and enter the dissolver 80, which is connected to the dissolver chute 81, through the dissolver chute 81 for subsequent dissolution, thereby realizing the classified collection and processing of the end and spent fuel active segment.

[0189] In some embodiments, a cover 1031 is detachably connected to the top of the receiving portion. The cover 1031 is positioned corresponding to the second shear trap 1060, and a spray rinsing system is connected to the cover 1031. After the end receiving container 60 collects the first and second ends, the spray rinsing system sprays and cleans the first and second ends. The waste liquid after cleaning flows out through the through hole at the bottom of the end receiving container 60 and flows into the second shear trap 1060 below, where the wastewater is collected. After cleaning, the top cover 1031 can be opened, and the end receiving container 60 can be lifted out and transferred to the processing heat chamber 5 for subsequent processing.

[0190] In this embodiment, when shearing the spent fuel assembly, the feeding system 40 first pushes the first end into the shearing device 50 to a designated position. The end receiving container 60 enters the receiving station a. The shearing device 50 shears the first end, and after the first end falls into the end receiving container 60, the end receiving container 60 retracts to the cleaning and transfer station b.

[0191] After the first end is sheared, the feeding system 40 pushes the spent fuel assembly to the shearing device 50 according to the preset length. The shearing of the active section of the spent fuel is completed by alternating feeding, shearing and feeding steps. The sheared fragments fall into the melter chute 81.

[0192] After the spent fuel active section is sheared and the dust settles in the shear trap 1000, the end receiving container 60 is pushed to the discharge port of the shearing device 50, i.e., receiving station a. The feeding system 40 pushes the second end into the shear trap 1000 and it falls into the end receiving container 60. The end receiving container 60 then returns to the cleaning and transfer station b. At this point, the shearing operation of one spent fuel assembly is complete.

[0193] While the shearing device 50 performs the shearing task, the lifting and overturning system simultaneously prepares materials to complete the underwater transfer, lifting, and overturning of the next spent fuel assembly.

[0194] After the shearing device 50 completes the batch processing of spent fuel assemblies, the spray cleaning system on the control cover 1031 sprays and cleans the ends, and then the end receiving container 60 containing the ends is lifted by a crane to the processing heat chamber 5.

[0195] The end-of-life processing device 70 in the hot chamber 5 processes the end-of-life fragments into the required size and loads them into a waste bin for collection and transport, facilitating subsequent processing.

[0196] In some embodiments, the pressure of the feeding hot chamber 2 is set higher than that of the feeding hot chamber 3, and the pressure of the feeding hot chamber 3 and the processing hot chamber 5 is set higher than that of the shearing hot chamber 4, thereby forming a pressure gradient between different hot chambers. This ensures that the path of radioactive materials after the spent fuel assembly is destroyed is protected, and prevents radioactive aerosols generated in the shearing hot chamber 4 from entering the adjacent feeding hot chamber 3 and processing hot chamber 5.

[0197] like Figure 1 As shown, in some embodiments, the air pressure of each hot chamber can be controlled by controlling the air supply and exhaust flow of each hot chamber.

[0198] like Figure 1 As shown, in some embodiments, the processing hot chamber 5 and the maintenance hot chamber 6 are adjacent to each other, and the processing hot chamber 5 and the maintenance hot chamber 6 are connected by a shielding door 51. When the shearing device 50 or the end processing device 70 needs to be repaired or replaced, the parts that need to be repaired can be transferred to the maintenance hot chamber 6 through the shielding door 51 for repair.

[0199] Regarding the embodiments of the present invention, it should also be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0200] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for crushing spent fuel assemblies, the spent fuel assembly comprising a first end, a second end, a spent fuel active section, and an outer casing, wherein the first end and the second end are fixedly connected to the outer casing at their respective ends, the spent fuel active section is disposed within the outer casing, and the length of the first end is less than the length of the second end, characterized in that, It includes the following steps: S100: Retrieve spent fuel assemblies from the spent fuel assembly pool; S200: Transfer the spent fuel assembly from the spent fuel assembly pool to the charging hot chamber, and change the attitude of the spent fuel assembly from a first attitude to a second attitude, wherein the first attitude is perpendicular to the second attitude, and in the first attitude, the position of the first end is higher than the position of the second end; S300: Push the spent fuel assembly in the feeding hot chamber to the feeding hot chamber; S400: Close the passage between the loading hot chamber and the feeding hot chamber; S500: Rotate the spent fuel assembly in the feeding hot chamber to achieve a 180° rotation of the spent fuel assembly, so that the spent fuel assembly changes from the second posture to the third posture, and the spent fuel assembly is transported to the shearing feeding position; S600: The spent fuel assembly is transported to the shearing position for shearing; The S600 procedure also includes the following steps: S601: Cut off the first end and collect the cut-off first end, then clean it. S602: Cut the spent fuel active section to a predetermined length; S603: After shearing the spent fuel active segment, collect the second end and clean the second end; S604: Transfer the cleaned first end and second end to the processing heat chamber for further processing; Step S604 also includes: S6041: Transfer the first end and the second end to the processing heat chamber; S6042: The second end is cut to a predetermined length in the processing hot chamber; S6043: Collect the cut second end and the first end, and then process the solid waste.

2. The crushing method according to claim 1, characterized in that, In step S602, The value of the predetermined length is determined according to the requirements of dissolution.

3. The crushing method according to claim 1, characterized in that, In step S600, The spent fuel assembly is compressed horizontally for a predetermined length, and then horizontally sheared along that length.

4. The crushing method according to claim 1, characterized in that, Step S200 also includes: Grasp the first end and lift the spent fuel assembly away from the shielding water layer; The spent fuel assembly is drained before entering the charging hot chamber; After the spent fuel assembly is drained, its orientation is changed from the first orientation to the second orientation.

5. The crushing method according to claim 1, characterized in that, The air pressure in the loading hot chamber is set to be higher than that in the feeding hot chamber, and the air pressure in the feeding hot chamber and the processing hot chamber are set to be higher than that in the shearing hot chamber.

6. The crushing method according to claim 5, characterized in that, The air pressure in each hot chamber is controlled by controlling the air supply and exhaust flow rate of each hot chamber.

7. The crushing method according to claim 1, characterized in that, In step S600, the shearing process is carried out in a closed environment of the shearing device, and the airflow is controlled and the spent fuel assembly is cooled to prevent the radioactive products after shearing from entering the preceding steps.

8. The crushing method according to claim 1, characterized in that, In step S500, the rotation is performed using an eccentric rotation method.

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