CN117936140A - Crushing treatment method of spent fuel assembly - Google Patents

Abstract

The embodiment of the invention relates to the technical field of spent fuel treatment, in particular to a crushing treatment method of a spent fuel assembly. 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 the loading hot chamber, and changing the attitude of the spent fuel assembly from a first attitude to a second attitude; s300: pushing the spent fuel assemblies in the feeding hot chamber to the feeding hot chamber; s400: closing a channel between the feeding hot chamber and the feeding hot chamber; s500: rotating the spent fuel assembly within the feedheat chamber to transform the spent fuel assembly from the second attitude to a third attitude, and transporting the spent fuel assembly to a shear feed location; s600: the spent fuel assembly is transported to a shearing location for shearing. The processing method in the embodiment of the invention can process the spent fuel assembly which is in the form of a hexagonal outer sleeve and is made of stainless steel structure materials.

Description

Crushing treatment method of spent fuel assembly

Technical Field

The embodiment of the invention relates to the technical field of spent fuel treatment, in particular to a crushing treatment method of a spent fuel assembly.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. Post-processing of spent fuel assemblies generally includes fragmentation and component differentiation of the spent fuel assembly, chemical dissolution of the spent fuel active section, chemical separation, and tail end treatment of uranium, plutonium. During the breaking process of the spent fuel assembly, the shearing system breaks down the spent fuel assembly and provides a treatable spent fuel broken-section feedstock for a subsequent dissolution process.

Disclosure of Invention

The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. Its purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

The embodiment of the invention provides a crushing treatment method of a spent fuel assembly. The spent fuel assembly comprises a first end head, a second end head, a spent fuel active section and an outer sleeve, wherein the first end head and the second end head are fixedly connected with the outer sleeve at two ends of the outer sleeve, the spent fuel active section is arranged in the outer sleeve, and the length of the first end head is smaller than that of the second end head. The crushing treatment 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 the loading hot chamber, and changing the attitude of the spent fuel assembly from a first attitude to a second attitude, wherein the first attitude is vertical to the second attitude, and the position of the first end head in the first attitude is higher than the position of the second end head; s300: pushing the spent fuel assemblies in the feeding hot chamber to the feeding hot chamber; s400: closing a channel between the feeding hot chamber and the feeding hot chamber; s500: rotating the spent fuel assembly within the feedheat chamber to transform the spent fuel assembly from the second attitude to a third attitude, and transporting the spent fuel assembly to a shear feed location; s600: the spent fuel assembly is transported to a shearing location for shearing.

According to the processing method provided by the embodiment of the invention, the spent fuel assembly which is in the form of the hexagonal outer sleeve and is made of stainless steel structure can be processed, the spent fuel assembly can be sheared into crushed aggregates suitable for dissolution without breaking the outer sleeve of the spent fuel assembly, and the processing efficiency of the spent fuel assembly is improved.

Drawings

Other objects and advantages of the present invention will become apparent from the following description of embodiments of the present invention, which is to be read in connection with the accompanying drawings, and may assist in a comprehensive understanding of the present invention.

FIG. 1 is a schematic diagram of a spent fuel assembly processing system according to one embodiment of the invention.

Fig. 2 is a schematic structural view of a feeding system according to an embodiment of the present invention.

Fig. 3 is a schematic view of a portion of the feed system of fig. 2.

Fig. 4 is a schematic view of the construction of a power assembly and a propeller shaft according to one embodiment of the present invention.

Fig. 5 is a cross-sectional view of a drive shaft according to one embodiment of the invention.

Fig. 6 is a schematic structural view of a rotary carrier assembly according to one embodiment of the present invention.

FIG. 7 is a cross-sectional view of a rotary carrier assembly according to one embodiment of the invention.

Fig. 8 is a schematic diagram of a rotary switching device according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a coupling according to an embodiment of the present invention.

Fig. 10 is a schematic view of a coupling in a coupled state according to an embodiment of the present invention.

Fig. 11 is a schematic view of a coupling in a disconnected state according to an embodiment of the present invention.

Fig. 12 is a schematic structural view of a rotating silo according to one embodiment of the invention.

Fig. 13 is a schematic view of the rotary silo of fig. 12 from another perspective.

FIG. 14 is a schematic view of the mounting engagement of a rotating silo with a rotating carrier assembly in accordance with one embodiment of the invention.

Fig. 15 is a schematic view of a rotating magazine in a receiving position according to one embodiment of the present invention.

Fig. 16 is a schematic view of a rotating magazine in a shear feed position according to one embodiment of the present invention.

Fig. 17 is an enlarged view at a in fig. 3.

Fig. 18 is a schematic view of a structure of a press buckle assembly in a compressed state according to an embodiment of the present invention.

Fig. 19 is a schematic structural view of a pushing device according to an embodiment of the present invention.

Fig. 20 is a schematic diagram of a pushing device according to an embodiment of the present invention.

FIG. 21 is a schematic structural view of an inflatable seal assembly according to an embodiment of the present invention.

FIG. 22 is a schematic view of an installation process of an inflatable seal assembly according to an embodiment of the invention.

Fig. 23 is a schematic structural view of an air intake assembly according to an embodiment of the present invention.

Fig. 24 is a cross-sectional view of the intake assembly of fig. 23.

Fig. 25 is a schematic view of the structure of the drive shaft, chain assembly and pushing assembly according to one embodiment of the invention.

Fig. 26 is a schematic structural view of a pushing assembly according to an embodiment of the present invention.

Fig. 27 is a schematic structural view of a push connection according to an embodiment of the present invention.

Fig. 28 is a schematic structural view of a pushing portion according to an embodiment of the present invention.

Fig. 29 is a schematic view of a structure of a shearing device and a hydraulic driving device according to an embodiment of the present invention.

Fig. 30 is a schematic top view of a shearing device according to an embodiment of the invention.

Fig. 31 is a cross-sectional view of a shearing device according to an embodiment of the invention.

Fig. 32 is a schematic view of a shear well and a tip receiving receptacle in a receiving station according to one embodiment of the invention.

FIG. 33 is a schematic view of a shear well and a tip receiving receptacle at a purge transfer station in accordance with an embodiment of the invention.

Fig. 34 is a schematic view of the structure of a shear well and a header-receiving receptacle according to one embodiment of the invention.

It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

Detailed Description

Exemplary embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made in order to achieve the developer's specific goals, such as compliance with system-and business-related constraints, and that these constraints will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

It should be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only the device structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, while other details not greatly related to the present invention are omitted.

The inventor of the present invention has found that, in the post-treatment of spent fuel, conventional spent fuel assembly treatment methods are mostly used for treating quadrangular pressurized water reactor spent fuel assemblies, which are difficult to be used for treating hexagonal stainless steel spent fuel assemblies. Based on the above, the embodiment of the invention provides a treatment method of a spent fuel assembly, which is used for shearing the hexagonal stainless steel spent assembly into crushed aggregates suitable for dissolution, so as to facilitate the treatment of subsequent processes.

The spent fuel assembly comprises a first end, a second end, a spent fuel active section and an outer sleeve. The first end and the second end are fixedly connected with the outer sleeve at two ends of the outer sleeve, the spent fuel active section is arranged in the outer sleeve, and the length of the first end is smaller than that of the second end.

The processing method provided by the embodiment of the invention comprises the following steps S100 to S600.

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 the loading hot chamber, and changing the attitude of the spent fuel assembly from a first attitude to a second attitude, wherein the first attitude is vertical to the second attitude, and the position of the first end head in the first attitude is higher than the position of the second end head;

S300: pushing the spent fuel assemblies in the feeding hot chamber to the feeding hot chamber;

s400: closing a channel between the feeding hot chamber and the feeding hot chamber;

S500: rotating the spent fuel assembly within the feedheat chamber to transform the spent fuel assembly from the second attitude to a third attitude, and transporting the spent fuel assembly to a shear feed location;

s600: the spent fuel assembly is transported to a shearing location for shearing.

According to the processing method provided by the embodiment of the invention, the hexagonal stainless steel spent fuel assembly can be processed, the spent fuel assembly can be sheared into crushed aggregates suitable for dissolution without breaking the outer sleeve of the spent fuel assembly, and the processing efficiency of the spent fuel assembly is improved.

The spent fuel assembly is stored in a first attitude (i.e., vertical) within a pool of spent fuel assemblies with a first end of the spent fuel assembly facing upward. In some embodiments, the step S200 comprises: grabbing the first end head, and lifting the spent fuel assembly to leave the shielding water layer; draining the spent fuel assembly before the spent fuel assembly enters a loading hot chamber; after the spent fuel assembly is drained, its pose is changed from the first pose to the second pose. In this embodiment, the end product obtained after the spent fuel assembly is sheared includes powder, and the spent fuel assembly is drained and then sent into the loading hot chamber, so that the water remained on the spent fuel assembly can be prevented from being mixed with the powder to form a mixture after the subsequent shearing.

As shown in fig. 1, in some embodiments, a lift and turn system is provided within the loading chamber 2, which includes a lift and turn device 11 and a lift bin. In steps S100 and S200, spent fuel assemblies may be picked up and transferred using the lift turnover device 11 and lift bins. Specifically, the loading hot chamber 2 is located above the spent fuel assembly pool 1, the lifting and turning device 11 can drive the lifting bin to move into the spent fuel assembly pool 1 to receive the spent fuel assembly to be treated, and the lifting and turning device 11 can drive the lifting bin to turn over so that the spent fuel assembly is changed from the first posture to the second posture.

In some embodiments, an underwater transfer device 12 is disposed in the spent fuel assembly pool 1, and in step S100, the spent fuel assembly to be treated may be lifted to the underwater transfer device 12 by using a crane, and the underwater transfer device 12 may transfer the spent fuel assembly to a designated position below the lifting bin for subsequent transfer.

Further, in step S200, the lifting bin may be controlled to turn down by 90 ° to make it in a vertical state, and meanwhile, the lifting bin is in a vertical state to make its lower end located in the spent fuel group pool 1, and the gripper provided in the lifting bin may grasp the spent fuel assembly located at a specified position in the spent fuel group pool 1 and lift it into the lifting bin, where the spent fuel assembly is still in the first posture, i.e. in a vertical state. After the spent fuel assembly receives the position, the lifting bin can be controlled to be turned upwards by 90 degrees to be in a horizontal state, and meanwhile, the lifting bin is turned back into the feeding hot chamber 2, so that the spent fuel assembly is changed from a first posture into a second posture (namely, the horizontal state), and is pushed into the feeding hot chamber 3 in the horizontal state, and horizontal feeding of the spent fuel assembly is realized.

As shown in fig. 1, the lifting and turning system further comprises a pushing device 13, which is arranged in the loading hot chamber 2. In step S300, the spent fuel assembly in the lift bin may be pushed into the feed hot chamber 3 by the pushing device 13.

Further, a rotary bin 20 is arranged in the feeding hot chamber 3, and a first transition bin 31 is communicated between the feeding hot chamber 2 and the feeding hot chamber 3. When the lifting bin is turned to a horizontal state, the lifting bin is in butt joint with one end of the first transition bin 31, and the other end of the first transition bin 31 is in butt joint with the rotary bin 20 in the feeding hot chamber 3. The pushing device 13 may push spent fuel assemblies in the lift bin into the rotating bin 20 via the first transition bin 31.

As shown in fig. 1, in some embodiments, one end of the first transition bin 31 in the feeding hot chamber 3 is connected with a gas seal door 33, and the gas seal door 33 can be closed or opened, so that communication or isolation between the feeding hot chamber 2 and the feeding hot chamber 3 is realized. In step S400, after the spent fuel assembly is pushed into the rotating silo 20 within the hot feed chamber 3, the gas seal door 33 may be closed to close the channel between the hot feed chamber 2 and the hot feed chamber 3.

As shown in fig. 1, a feeding system 40 is arranged in the feeding hot chamber 3, and the feeding system 40 can drive the rotary silo 20 to rotate 180 degrees so as to realize 180-degree rotation of the spent fuel assembly in the rotary silo 20, so that the spent fuel assembly is converted from the second posture to the third posture.

In this embodiment, after the lifting bin is turned over, the spent fuel assembly is in the second posture, and the second end of the spent fuel assembly faces the feeding hot chamber 3. In this embodiment, after the spent fuel assembly is pushed to the feeding hot chamber 3, the rotating bin 20 drives the spent fuel assembly to horizontally rotate by 180 ° so that the first end faces the shearing hot chamber 4, thereby shearing the spent fuel assembly according to the sequence of the first end, the spent fuel active section and the second end can be realized.

In some embodiments, the spent fuel assembly is in the shear feed position after the feed system 40 drives the rotating silo 20 into rotation. At this point, the feed system 40 may push the spent fuel assemblies within the rotating silo 20 into the shearing heat chamber 4 for shearing.

As shown in fig. 1, a shearing device 50 is disposed in the shearing heat chamber 4, and in step S600, the spent fuel assembly may be sheared by the shearing device 50. Specifically, the shearing device 50 may shear the spent fuel assembly as it is transported to a shearing location within the shearing device 50.

In some embodiments, as shown in fig. 1, a second transition bin 32 is communicated between the feeding hot chamber 3 and the shearing hot chamber 4, the rotary bin 20 is rotatably arranged between the first transition bin 31 and the second transition bin 32, one end of the second transition bin 32 can be in butt joint with the rotary bin 20, and the other end is in butt joint with a feed inlet of the shearing device 50. When the rotating bin 20 is in the receiving position, the rotating bin 20 is in communication with the first transition bin to receive the spent fuel assembly; when the rotating silo 20 is in the shear feed position, the rotating silo 20 interfaces with the second transition silo 32, pushing the spent fuel assembly into the shearing device 50 via the second transition silo 32.

Fig. 2 shows a schematic structural view of a feeding system 40 according to an embodiment of the present invention. As shown in fig. 2, in some embodiments, the feed system 40 within the feed heat chamber 3 includes a pushing device 100 and a rotary switching device 300, the rotary silo 20 for receiving the spent fuel assemblies pushed by the feed heat chamber 2. The rotary feed bin 20 is arranged on the rotary switching device 300, and the rotary switching device 300 is arranged to support and drive the rotary feed bin 20 to rotate, so that the rotary feed bin 20 is switched between a material receiving position and a shearing and feeding position, and the spent fuel assemblies in the rotary feed bin 20 are reversed.

Wherein, when the rotary bin 20 rotates to the material receiving position, the rotary bin 20 is in butt joint with the first transition bin 31 for receiving the spent fuel assembly; when the rotary bin 20 rotates to the shearing feeding position, two ends of the rotary bin 20 are respectively connected with the pushing device 100 and the second transition bin 32 in a sealing manner. The pushing device 100 is used to push the spent fuel assembly within the rotating silo 20 toward the shearing device 50 to push the spent fuel assembly into the shearing device 50 via the second transition silo 32. The shearing device 50 is used for shearing the spent fuel assembly pushed into the shearing device 50.

According to the embodiment of the invention, the rotating bin 20 receives the spent fuel assembly conveyed by the pushing device 100, and the rotating switching device 300 is arranged, so that the rotating bin 20 can rotate 180 degrees in the horizontal direction, the spent fuel assembly pushed to the rotating bin 20 rotates forward from the second end head to the first end head, and the spent fuel assembly is conveyed into the shearing device 50 in the direction of the first end head forward, so that the requirement that the spent fuel assembly needs to be sheared sequentially according to the sequence of the first end head, the spent fuel active section and the second end head is met. In addition, the rotary bin 20 is rotatably arranged between the shearing device 50 and the pushing device 100, so that the spent fuel assembly is conveniently sent into the shearing device 50 by pushing of the pushing device 100, shearing of the spent fuel assembly is achieved, safety and reliability of the shearing process of the spent fuel assembly are improved, and processing efficiency of the spent fuel assembly is improved.

As shown in fig. 3, in some embodiments, the rotary switching device 300 may include: a power assembly 310, a drive shaft 320, and a rotational bearing assembly 330. One end of the driving shaft 320 is connected to the power assembly 310, and the power assembly 310 is used to drive the driving shaft 320 to rotate. The rotating carrier 330 is drivingly connected to the other end of the drive shaft 320, and the drive shaft 320 is configured to drive the rotating carrier 330 to rotate about an axis perpendicular to the drive shaft 320. The rotary bin 20 is supported by the rotary bearing assembly 330, and the rotary bearing assembly 330 is used for supporting and driving the rotary bin 20 to rotate, so that the rotary bin 20 is switched between a material receiving position and a shearing and feeding position. In this embodiment, by setting the rotary bearing component 330, the rotary silo 20 can rotate in the horizontal direction, so as to reverse the spent fuel component fed into the rotary silo 20, and rotate the spent fuel component in the rotary silo 20 forward from the second end to the first end, so that the spent fuel component is conveyed into the shearing device 50 in the forward direction of the first end, and the requirement that the spent fuel component needs to be sheared sequentially according to the sequence of the first end, the spent fuel active section and the second end is met.

In this embodiment, when the rotary silo 20 is at the receiving position, the spent fuel assembly pushed in the loading hot chamber 2 can be received, and after the rotary silo 20 receives the spent fuel assembly, the rotary bearing assembly 330 drives the rotary silo 20 to rotate, so that the rotary silo 20 is switched to the shearing feeding position, and meanwhile, the reversing of the spent fuel assembly is realized. The spent fuel assemblies within the rotating silo 20 may be pushed into the shearing device 50 when the rotating silo 20 is in the shear feed position.

As shown in fig. 4, in some embodiments, the power assembly 310 includes a driver 311 and a decelerator 312, the driver 311 is used to provide power to the transmission shaft 320, the decelerator 312 is connected between the driver 311 and the transmission shaft 320, and the decelerator 312 is used to transmit the power of the driver 311 to the transmission shaft 320 while reducing the rotation speed so that the rotation speed of the transmission shaft 320 satisfies the requirement. In some embodiments, the driver 311 is a motor, such as a servo motor.

Further, a coupling 313 is connected between the driver 311 and the decelerator 312, and the coupling 313 can compensate for the offset between the output shaft of the driver 311 and the input shaft of the decelerator 312, and also has buffering and vibration damping effects. Illustratively, the coupling 313 in the present embodiment may be an elastic coupling.

Because the rotary silo 20 is used for accommodating the spent fuel assembly and has radioactivity, the rotary bearing assembly 330 and the rotary silo 20 are arranged in the feeding hot chamber 3, so that the radioactive radiation of the spent fuel assembly is shielded, and a protective effect is achieved. In some embodiments, the power assembly 310 is disposed outside the feed heat chamber, thereby avoiding that the power assembly 310 is exposed to radioactive radiation that would interfere with proper operation.

As shown in fig. 5, the drive shaft 320 includes a solid shaft 321, a hollow shaft 322, and a fixing portion 323. The solid shaft 321 is connected with the power assembly 310, the hollow shaft 322 is connected between the solid shaft 321 and the rotary bearing assembly 330, the solid shaft 321 is rotatably sleeved in the fixing part 230, the fixing part 323 is arranged to penetrate through the wall of the feeding hot chamber 3, and the fixing part 323 is used for installing the solid shaft 321 in the wall of the feeding hot chamber 3, so that power provided by the power assembly 310 outside the feeding hot chamber 3 is transmitted to the rotary bearing assembly 330 inside the feeding hot chamber 3. In this embodiment, the fixing portion 323 is wrapped around the solid shaft 321, so that the solid shaft 321 can rotatably penetrate through the wall.

The solid shaft 321 penetrates through the wall, and the hollow shaft 322 is suspended between the wall and the rotary bearing assembly 330. In this embodiment, the portion penetrating the wall body is set as the solid shaft 321, so that the strength and the torsion resistance of the transmission shaft 320 can be increased, and the hollow shaft 322 is used in the suspended portion, so that the deflection generated by the gravity of the transmission shaft 320 can be reduced, and the levelness of the transmission shaft 320 is effectively ensured. In addition, the solid shaft 321 and the hollow shaft 322 may be connected by welding.

As shown in fig. 6 and 7, in some embodiments, the rotating carrier assembly 330 may include: a carrying portion 331, a body portion 332, a power input portion 333, and a power output portion 334. The rotary bin 20 is supported on a supporting portion 331, and the supporting portion 331 is rotatably disposed on the main body 332. The driving shaft 320 is connected to the power input part 333, and the driving shaft 320 is used to drive the power input part 333 to rotate about a first axis, which is parallel to the axis of the driving 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 around a second axis, where the first axis is perpendicular to the second axis.

Specifically, the rotation axis of the power input portion 333 is parallel to the direction of the bearing surface of the bearing portion 331 while being parallel to the axial direction of the transmission shaft 320, and the rotation axis of the power output portion 334 is perpendicular to the direction of the bearing surface of the bearing portion 331 while being perpendicular to the axial direction of the transmission shaft 320. By providing the power input part 333 and the power output part 334, the torsional force input by the transmission shaft 320 is converted into the torsional moment in the other direction perpendicular to the torsional force, so that the rotation reversing function of the bearing part 331 can be realized, and the relative position and the connection mode of the rotation bearing assembly 330 and the power assembly 310 can be reasonably arranged.

In some embodiments, the magnitude of the torsional moment may be controlled by controlling the magnitude of the power output by power assembly 310. By controlling the angle at which the driving shaft 320 rotates, the angle at which the bearing 331 rotates can be controlled. For example, the bearing part 331 may be controlled to rotate 180 degrees, so that the rotating bin 20 borne by the bearing part 331 rotates 180 degrees in the horizontal direction, and switching between the material receiving position and the shearing feeding position of the rotating bin 20 and reversing of the spent fuel assemblies in the rotating bin 20 are achieved.

In some embodiments, the power take-off 334 is fixedly connected to the carrier 331 such that the carrier 331 and the power take-off 334 are capable of rotating synchronously. The manner of fixedly connecting the power output portion 334 to the carrying portion 331 includes, but is not limited to, an interference fit, a keyed connection, etc.

As shown in fig. 6, the power input portion 333 is provided partially outside the main body portion 332, and the other portion is provided inside the main body portion 332. One end of the power input part 333 extending out of the body part 332 is connected to the transmission shaft 320, thereby providing power to the power input part 333.

As shown in fig. 7, in some embodiments, the power input 333 is a worm and the power output 334 is a worm gear, with which the worm meshes. As shown in fig. 8, the power assembly 310 drives the transmission shaft 320 to rotate, the transmission shaft 320 drives the worm to rotate, and the worm wheel is driven to rotate when the worm rotates, so as to drive the whole bearing part 331 to rotate. The worm and gear structure has higher precision, can accurately control the rotating angle, and has high reliability and difficult damage. In addition, the worm gear structure has a deceleration function, that is, the bearing part 331 can be prevented from rotating excessively due to inertia, and stable control of rotation of the bearing part 331 is realized.

Further, the transmission shaft 320 can drive the power input part 333 and the power output part 334 to rotate forward or reverse, so that the bearing part 331 can rotate forward or reverse to realize the switching of the rotary bin 20 between the receiving position and the cutting and feeding position.

As shown in fig. 6, in some embodiments, the body portion 332 may be a box structure, with a space within the body portion 332 to accommodate other components. For example, the power input portion 333 and the power output portion 334 may be provided inside the body portion 332.

As shown in fig. 7, in some embodiments, the rotary bearing assembly 330 further includes a supporting portion 336, and the supporting portion 336 is disposed between the bearing portion 331 and the body portion 332, such that the bearing portion 331 is rotatably supported on the supporting portion 336, and the supporting portion 336 can stably support the bearing portion 331. Alternatively, the support 336 may be a pivoting support that is capable of withstanding large axial, radial loads, and overturning moments.

In some embodiments, the bearing portion 331 is sealingly connected to the body portion 332, and the bearing portion 331 is rotatable relative to the body portion 332 and the connection is sealed to prevent contamination of structures within the body portion 332. Further, as shown in fig. 6, the main body 332 is provided with an air inlet tube 3320, and the air inlet tube 3320 is used for delivering air into the main body 332, so that the main body 332 can maintain positive pressure to the outside, thereby effectively preventing magazines such as external dust from entering the main body 332, and further ensuring the sealing between the bearing 331 and the main body 332. For example, the air inlet duct 3320 may be provided at a side surface of the body portion 332.

As shown in fig. 3, in some embodiments, the rotary switching device 300 further includes a coupling 340, and the coupling 340 is connected between the power input 333 and the transmission shaft 320, for compensating for radial errors and axial errors between the power input 333 and the transmission shaft 320.

As shown in fig. 9, the coupling 340 in the present embodiment includes a coupling body 341 and a driving assembly. One end of the transmission shaft 320 remote from the power assembly 310 is detachably connected to one end of the coupling body 341, and the power input part 333 is connected to the other end of the coupling body 341. The driving assembly is connected to the coupling body 341 and is used for driving the coupling body 341 to move along the axial direction of the transmission shaft 320, so that the transmission shaft 320 is connected into the coupling body 341 or disconnected from the coupling body 341.

In this embodiment, the driving assembly is utilized to drive the shaft coupling body 341 to move along the axial direction of the driving shaft 320, so that the driving shaft 320 can be quickly separated from the shaft coupling body 341, thereby realizing quick disassembly between the driving shaft 320 and the shaft coupling 340, and facilitating disassembly of the driving shaft 320 or rotation of the bearing assembly 330. In addition, the transmission shaft 320 can be inserted into the coupling body 341, so that rapid installation between the transmission shaft 320 and the coupling 340 can be achieved. The present embodiment can achieve quick connection and disconnection between the transmission shaft 320 and the power input part 333 of the rotation bearing assembly 330 by providing the coupling 340.

As shown in fig. 9, in some embodiments, the drive assembly includes a support 342, a swing 343, a connecting shaft 344, and a slider 345. The support 342 is fixed to the rotary carrier assembly 330, for example, the support 342 may be fixed to a side of the body portion 332. The supporting member 342 is provided with a first limiting hole 346 and a second limiting hole 347, one end of the swinging member 343 is inserted into the first limiting hole 346 or the second limiting hole 347, and the other end of the swinging member 343 is connected with the connecting shaft 344. The connection shaft 344 is rotatably mounted to the support 342, and the connection shaft 344 is perpendicular to the transmission shaft 320. One end of the slider 345 is connected to the connecting shaft 344, and the other end of the slider 345 is slidably connected to the coupling body 341.

Wherein, as shown in fig. 10, when the swing member 343 is positioned in the first limit hole 346, the coupling body 341 is connected with the transmission shaft 320; as shown in fig. 11, when the swing member 343 is positioned in the second limiting hole 347, the transmission shaft 320 is disengaged from the coupling body 341, and the detachment of the transmission shaft 320 or the rotation bearing assembly 330 can be achieved. When the swinging member 343 swings between the first limiting hole 346 and the second limiting hole 347, the connecting shaft 344 and the sliding member 345 are driven to rotate around the axis of the connecting shaft 344, and the sliding member 345 drives the coupling body 341 to move along the axial direction of the transmission shaft 320 when rotating, so as to realize connection and disconnection between the transmission shaft 320 and the coupling body 341.

In some embodiments, the support 342 is provided with a limiting block 348, and the limiting block 348 is used for limiting the swinging member 343 to swing between the first limiting hole 346 and the second limiting hole 347, so as to avoid excessive movement of the coupling body 341 caused by excessive swinging of the swinging member 343, and influence the transmission shaft 320 or the power input part 333. Specifically, two limiting blocks 348 are provided on the support 342 for limiting the swing angle of the swing member 343 so that the swing member 343 swings between the first limiting hole 346 and the second limiting hole 347.

In some embodiments, the swing member 343 may be remotely controlled to swing between the first and second spacing apertures 346, 347 to allow for quick installation and removal of the coupling 340 from the drive shaft 320. Specifically, as shown in fig. 9, an operation portion 3431 is disposed at an end of the swinging member 343 away from the connecting shaft 344, and the operation portion 3431 facilitates remote operation of the manipulator, so as to achieve quick assembly and disassembly between the transmission shaft 320 and the rotating carrier assembly 330.

When the coupling 340 is in the working state, the swinging member 343 is inserted into the first limiting hole 346, so as to limit the position of the coupling body 341, and prevent the coupling body 341 from moving and disconnecting from the transmission shaft 320 during the operation of the rotary switching device 300. When the disassembly is required, the manipulator can be operated to move the operation part 3431 upwards so as to pull the swinging member 343 out of the first positioning hole and release the limit of the coupler 340, and then the manipulator can push the swinging member 343 to move and insert the swinging member 343 into the second limiting hole 347, so that the coupler body 341 is driven to move along the axial direction of the transmission shaft 320, and the connection between the transmission shaft 320 and the coupler body 341 is disconnected. Conversely, the swing member 343 is moved and inserted into the first limiting hole 346, so that the quick connection between the coupling 340 and the transmission shaft 320 can be achieved.

In some embodiments, the support 342 is provided with a coupling barrel, and the coupling shaft 344 is rotatably disposed within the coupling barrel such that the coupling shaft 344 is rotatable relative to the support 342. Bearings are provided between the connection shaft 344 and the connection cylinder to support the connection shaft 344 to rotate within the connection cylinder.

As shown in fig. 9, in some embodiments, the coupling body 341 is cylindrical, and an accommodating space for accommodating the transmission shaft 320 and the power input part 333 is formed inside thereof, the transmission shaft 320 is inserted into the coupling body 341 from one end of the coupling body 341, and the power input part 333 is inserted into the coupling body 341 from the other end of the coupling body 341, thereby achieving a transmission connection between the transmission shaft 320 and the power input part 333.

In some embodiments, the inner surface of the coupling body 341 is provided with tooth-shaped portions 3411, a plurality of teeth in the tooth-shaped portions 3411 are arranged along the circumferential direction of the coupling body 341, and each tooth extends along the axial direction of the coupling body 341. The two ends of the coupling body 341 are provided with tooth-shaped parts 3411, the ends of the transmission shaft 320 and the power input part 333 are provided with tooth-shaped matching parts meshed with the tooth-shaped parts 3411, and the coupling body 341 is connected with the transmission shaft 320 and the power input part 333 through the meshing of the tooth-shaped parts 3411 and the tooth-shaped matching parts. In some embodiments, the coupling body 341 is a crown gear sleeve.

When the coupling body 341 moves in the axial direction of the transmission shaft 320, the transmission shaft 320 may be inserted into the coupling body 341 and engaged with the tooth 3411, thereby enabling the transmission shaft 320 to rotate the coupling body 341. Meanwhile, the power input part 333 is connected to the inside of the coupling body 341 and is engaged with the tooth-shaped part 3411 at the other end of the coupling body 341, so that the power input part 333 is driven to rotate when the coupling body 341 rotates, and power transmission is realized.

As shown in fig. 9, in some embodiments, the coupling body 341 is provided with a sliding groove 3412, and the sliding groove 3412 is provided in the circumferential direction of the coupling body 341. The sliding member 345 is slidably connected in the sliding groove 3412, and the sliding member 345 surrounds a portion of the coupling body 341. When the swinging 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 along the radial direction of the transmission shaft 320, so as to drive the coupling body 341 to move along the axial direction of the transmission shaft 320; when the transmission shaft 320 rotates the coupling body 341 and the power input part 333, the slider 345 slides in the sliding groove 3412 to rotate the coupling body 341 with respect to the slider 345.

In some embodiments, the swing member 343 is perpendicular to the connection shaft 344, and the connection shaft 344 is perpendicular to the transmission shaft 320, specifically, the connection shaft 344 is perpendicular to the bearing surface of the bearing 331. When one end of the swinging member 343 moves between the first limiting hole 346 and the second limiting hole, it moves circumferentially around the axis of the connecting shaft 344, and drives the connecting shaft 344 to rotate, and when the connecting shaft 344 rotates, the sliding member 345 connected with the swinging member is driven to move circumferentially around the axis of the connecting shaft 344, so that the end of the sliding member 345 slides in the sliding groove 3412 and moves axially along the transmission shaft 320, and further the coupling body 341 is driven to move axially along the transmission shaft 320, so that the coupling body 341 is prevented from being blocked and moving due to the fact that the sliding member 345 drives the coupling body 341 to move radially.

For example, the sliding member 345 may be a fork structure including a connecting rod connected between the connecting shaft 344 and the C-shaped member, the C-shaped member surrounding the coupling body 341, and an end of the C-shaped member disposed in the sliding groove 3412 and slidable in the sliding groove 3412. Further, the end of the C-shaped member is spaced from the surface of the sliding groove 3412 so that the C-shaped member can slide smoothly in the sliding groove 3412.

In some embodiments, the rotating carrier 330 is provided with a limiting portion, which is used to fix the rotating bin 20, so as to prevent the rotating bin 20 from moving on the rotating carrier 330. Specifically, the limiting portion is disposed on the carrying portion 331 to fix the rotating bin 20 to the carrying portion 331.

As shown in fig. 12 and 13, the rotating silo 20 includes a silo body 210 for receiving the spent fuel assembly and a mounting plate 220, and the mounting plate 220 is fixed to both sides of the silo body 210. As shown in fig. 14, the mounting plate 220 cooperates with a limiting portion for limiting the position of the bin body 210 on the rotary carrier assembly 330.

As shown in fig. 6, in some embodiments, the limiting portion includes a plurality of first limiting portions 3381 and a plurality of second limiting portions 3382, and the plurality of first limiting portions 3381 are disposed at both sides of the mounting plate 220 in the first direction for fixing the position of the rotating magazine 20 in the first direction. The plurality of second limiting portions 3382 are disposed on two sides of the mounting plate 220 along the second direction, and are used for fixing the position of the rotating bin 20 in the second direction, so as to ensure that the rotating bin 20 keeps stable position relative to the bearing portion 331 when the bearing portion 331 rotates, and the rotating bin 20 synchronously rotates along with the bearing portion 331. The first direction is the extending direction of the rotating bin 20, and the second direction is perpendicular to the extending direction of the rotating bin 20.

In some of these, a groove 221 is provided on the mounting plate 220 at a position corresponding to the stopper portion, which is located in the groove 221, thereby restricting the position of the rotating magazine 20.

In some embodiments, the rotation of the spent fuel assembly can adopt an eccentric rotation mode, so that the occupied area of the feeding hot chamber 3 can be reduced, and the space is saved.

As shown in fig. 3, in some embodiments, the rotating bin 20 is carried on one side of the rotation axis of the carrying part 331, and when the carrying part 331 rotates 180 degrees around its rotation axis, the rotating bin 20 eccentrically rotates with respect to the center of the carrying part 331, so that the rotating bin 20 is parallel to the original extending direction of the rotating bin 20 after the eccentric rotation, thereby enabling the rotating bin 20 to rotate to the receiving position or the shear feeding position.

As shown in fig. 15, when the rotary bearing assembly 330 drives the rotary silo 20 to rotate to the material receiving position, the rotary silo 20 is in butt joint with the first transition silo 31, so that the pushing device 13 of the loading hot chamber 2 sends the spent fuel assembly into the rotary silo 20 through the first transition silo 31.

As shown in fig. 16, after the rotary bearing component 330 drives the rotary bin 20 to eccentrically rotate 180 ° and the rotary bin 20 is at the shearing feeding position, at this time, the rotary bin 20 is parallel to the first transition bin 31, two ends of the rotary bin are respectively in butt joint with the pushing device 100 and the second transition bin 32, the pushing device 100 pushes the spent fuel component in the rotary bin 20 to move into the second transition bin 32, and then pushes the spent fuel component into the shearing device 50 through the second transition bin 32, so as to realize horizontal feeding of the spent fuel component.

As shown in fig. 12 and 13, in some embodiments, a locating port 212 is provided on the rotating bin 20. As shown in fig. 17, the feeding system 40 further includes a pressing assembly 500, where the pressing assembly 500 is mounted on the rotating bin 20 and located at the positioning opening 212, and the pressing assembly 500 can rotate along with the rotating bin 20. The pressing buckle assembly 500 is configured to be inserted into the rotary bin 20 through the positioning opening 212 and cooperate with the spent fuel assembly, so as to limit the position of the spent fuel assembly in the rotary bin 20 when the rotary bin 20 rotates, prevent the spent fuel assembly from sliding during rotation or during an earthquake, and also prevent the spent fuel assembly from being pulled back by a pushing grip of the pushing device 13.

As shown in fig. 18, in some embodiments, the press-button assembly 500 includes a press-button mounting portion 510, a press-button portion 530, and a press-button driving portion 520. The press buckle installation part 510 is installed on the rotary bin 20, an accommodating space is formed in the press buckle installation part 510, an opening is formed in the bottom of the press buckle installation part 510, and the opening corresponds to the positioning opening 212. The pressing buckle part 530 is movably arranged in the accommodating space, and the pressing buckle part 530 is matched with the spent fuel assembly. The press button driving part 520 is disposed on the press button mounting part 510, the press button driving part 520 is connected with the press button part 530, and the press button driving part 520 is used for driving the press button part 530 to lift.

Wherein, as shown in fig. 18, when the rotating bin 20 rotates, the pressing buckle part 530 is configured to descend into the rotating bin 20 through the opening and the positioning opening 212 and press the spent fuel assembly to limit the spent fuel assembly, so as to prevent the spent fuel assembly from displacement in the rotating process; after the rotating bin 20 rotates in place, for example, after the rotating bin 20 rotates to the shearing feeding position, the buckling part 530 rises into the accommodating space of the buckling installation part 510 to release the limit on the spent fuel assembly, so that the pushing of the spent fuel assembly in the rotating bin 20 can be conveniently realized, and the spent fuel assembly can be pushed into the shearing device 50.

As shown in fig. 18, in some embodiments, the pressing buckle 530 is a pressing plate, which is provided with a limit groove 531, and the limit groove 531 is matched with the spent fuel assembly, so that when the pressing buckle 530 descends into the rotating bin 20, the spent fuel assembly can be pressed in the limit groove 531, and sliding or moving of the spent fuel assembly during rotation or earthquake is avoided, so that safety is ensured.

As shown in fig. 18, in some embodiments, the button driving part 520 is a cylinder, and the button driving part 520 is provided with an air inlet pipe 521, and the air inlet pipe 521 is used for supplying air to the cylinder. For example, the cylinder is provided with two intake pipes 521, and the two intake pipes 521 may be provided on both sides of the piston of the cylinder, respectively, and the cylinder may be supplied with air from the two intake pipes 521, respectively, so that the cylinder may be driven to output power from two opposite directions, thereby driving the pressing buckle part 530 to be lifted and lowered.

In some embodiments, as shown in fig. 7, the rotary carrier assembly 330 further includes a gas pipe 339, the gas pipe 339 is disposed in the body 332, a gas inlet 3391 of the gas pipe 339 is disposed in the body 332, the gas inlet 3391 is used for connecting with a gas source, a gas outlet 3392 of the gas pipe 339 is disposed on the carrier 331, and the gas outlet 3392 is used for connecting with the press button driving part 520 to convey the gas required for driving for the press button driving part 520. In some embodiments, the air inlet 3391 of the air delivery tube 339 is disposed at the side of the body portion 332 and the air outlet 3392 is disposed at the center of rotation of the carrier portion 331. Further, the air tube 339 is rotatably connected to the bearing 331 so that the outlet of the air tube 339 does not rotate when the bearing 331 rotates.

In this embodiment, the air pipe 339 is disposed in the body portion 332, so that when the bearing portion 331 and the rotating bin 20 and the pressing buckle assembly 500 borne by the bearing portion 331 rotate, the air pipe 339 does not rotate, and the connecting pipe between the air pipe 339 and the pressing buckle driving portion 520 can do circular motion with the air outlet 3392 of the air pipe 339 as the center of a circle, the connecting pipe between the air source and the air pipe 339 does not displace, and the connecting pipe is prevented from winding due to movement of the pressing buckle assembly 500 when the pressing buckle assembly 20 rotates, and even the rotation of the rotating bin 20 is affected.

In some embodiments, the body portion 332 is provided with two air delivery pipes 339 respectively connected to two air inlet pipes 521 of the button driving portion 520 so as to supply air from different directions for an air cylinder as the button driving portion 520 to drive the button portion 530 to rise and fall.

In some embodiments, mounting plate 220 is provided with a relief slot 222, where the location of relief slot 222 corresponds to air outlet 3392 of air delivery tube 339, and air outlet 3392 is positioned within relief slot 222 such that air delivery tube 339 does not rotate when carrier 331 and rotating bin 20 are rotated.

As shown in fig. 19 and 20, 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 arranged at one end of the rotating bin 20 far away from the shearing device 50, the pushing bin 110 is arranged on one side of the first transition bin 31 in parallel, the pushing bin 110 corresponds to the second transition bin 32, and the center lines of the pushing bin 110 and the second transition bin are coincident, so that spent fuel assemblies in the rotating bin 20 can be pushed into the shearing device 50 through the second transition bin 32, and two ends of the rotating bin 20 are respectively connected with the pushing bin 110 and the second transition bin 32 in a sealing mode when the rotating bin 20 is arranged at a shearing feeding position. One end of the transmission shaft 130 is connected to the power assembly 120, and the power assembly 120 is used for driving the transmission shaft 130 to rotate. The chain assembly 140 is in driving connection with the other end of the driving shaft 130, and the driving shaft 130 is used for driving the chain assembly 140 to reciprocate. The pushing assembly 150 is disposed in the pushing bin 110, the pushing assembly 150 is connected with the chain assembly 140, and the chain assembly 140 is configured to drive the pushing assembly 150 to move in the pushing bin 110 and the rotating bin 20, so as to push the spent fuel assembly in the rotating bin 20 to move to the shearing device 50.

In the embodiment of the invention, when the rotary silo 20 is in butt joint with the pushing silo 110, the chain component 140 is driven by the power component 120 to move in the pushing silo 110 and the rotary silo 20 so as to drive the pushing component 150 to move, thereby pushing the spent fuel component in the rotary silo 20 to move, enabling the spent fuel component to enter the shearing hot chamber 4 from the second transition silo 32, and realizing horizontal pushing of the spent fuel component.

In some embodiments, in step S600, the shearing process is performed in a closed environment of the shearing device, and the air flow control is performed to cool the spent fuel assembly, so as to avoid the step of entering the preamble of the sheared radioactive product.

To ensure that the interior of the shearing device 50 is in a closed environment during shearing, as shown in fig. 17 and 19, in some embodiments, the feeding system 40 further includes an inflatable sealing assembly 800, where the inflatable sealing assembly 800 is connected to the second transition chamber 32 at one end of the feeding hot chamber 3, and the inflatable sealing assembly 800 is configured to be inflatable for sealingly connecting the second transition chamber 32 with the rotating silo 20. In some embodiments, an inflatable sealing assembly 800 is coupled to an end of the pushing ram 110 proximate to the rotating ram 20, the inflatable sealing assembly 800 being configured to sealingly couple the pushing ram 110 to the rotating ram 20.

Wherein, when the rotating bin 20 rotates, the inflatable seal assembly 800 deflates such that there is a space between the pushing bin 110 and/or the second transition bin 32 and the rotating bin 20 to provide space for rotation of the rotating bin 20. When the two ends of the rotary bin 20 are respectively in butt joint with the pushing bin 110 and the second transition bin 32, the inflatable sealing assembly 800 is inflated to seal the joints of the rotary bin 20 and the pushing bin 110 and the joints of the rotary bin 20 and the second transition bin 32; meanwhile, as the other end of the pushing bin 110 is closed, the second transition bin 32 is in sealing connection with the shearing device 50, so that the pushing device 100, the rotating bin 20, the second transition bin 32 and the shearing device 50 form a sealing boundary, and the shearing device 50 is in a closed environment in the feeding and shearing process.

As shown in fig. 21, in some embodiments, the inflatable seal assembly 800 includes a seal mounting portion 810 and an inflatable cushion 820, the seal mounting portion 810 is connected to an end of the pushing bin 110 or the second transition bin 32, the inflatable cushion 820 is connected to a side of the seal mounting portion 810 away from the pushing bin 110 or the second transition bin 32, and the inflatable cushion 820 faces the rotating bin 20, the seal mounting portion 810 and the inflatable cushion 820 are both annular and are matched with the rotating bin 20, the inflatable cushion 820 is formed with a channel 821, the channel 821 is matched with the spent fuel assembly, so that when the rotating bin 20 is docked with the pushing bin 110 and the second transition bin 32, the rotating bin 20 can be communicated with the pushing bin 110 and the second transition bin 32, so that the pushing assembly in the pushing bin 110 can be moved to the rotating bin 20 and the spent fuel assembly in the rotating bin 20 can be pushed into the second transition bin 32 via the channel 821.

In some embodiments, an inflation port 830 is provided on seal mounting portion 810, and inflation port 830 is coupled to inflatable cushion 820 for effecting inflation and deflation of inflatable cushion 820. When the rotary bin 20 rotates to the shearing feeding position, two ends of the rotary bin 20 are respectively in butt joint with the pushing bin 110 and the second transition bin 32, at this time, the inflatable cushion 820 is inflated through the inflation port 830 to fill the gap between the rotary bin 20 and the pushing bin 110/the second transition bin 32, so that the feeding channel between the rotary bin 20 and the pushing bin 110/the second transition bin 32 is ensured to be sealed, and dust leakage is prevented. When the rotating bin 20 begins to rotate, the inflatable cushion 820 deflates back, thereby providing space for the rotation of the rotating bin 20.

As shown in fig. 22, the ends of the pushing bin 110 and the second transition bin 32 are provided with a connecting flange 722, the connecting flange 722 is provided with a mounting groove, and the inflatable sealing assembly 800 is mounted in the mounting groove, so that the mounting and fixing of the inflatable sealing assembly 800 are realized.

In order to control the air flow and cool the spent fuel assembly, the cut radioactive product is prevented from entering the preamble. As shown in fig. 19, in some embodiments, the feeding system 40 further includes an air intake assembly 600, where the air intake assembly 600 is disposed in the pushing bin 110, and the air intake assembly 600 is configured to intake air into the pushing bin 110, so that an air flow is blown from the pushing bin 110 to the shearing device 50 via the rotating bin 20, and dust generated in the shearing device 50 during the shearing process is prevented from entering the feeding system 40. In this embodiment, when the rotary bin 20 rotates to the shearing feeding position, the rotary bin 20 is communicated with the pushing bin 110, and the air inlet component can inlet air into the pushing bin 110, so that air flows along the directions of the pushing bin 110, the rotary bin 20 and the shearing device 50, dust in the shearing device 50 is prevented from entering the feeding system 40 along with the air flow, and the spent fuel component can be cooled.

As shown in fig. 23 and 24, in some embodiments, the intake assembly 600 includes an intake pipe 610 and a liquid seal 620. The air inlet pipe 610 is communicated with the pushing bin 110, and the air inlet pipe 610 is used for feeding air into the pushing bin 110. The liquid sealing structure 620 is disposed outside the air inlet pipe 610, and sealing liquid is stored in the liquid sealing structure 620 and used for sealing the air inlet pipe 610 and the pushing bin 110, so that the air in the air inlet pipe 610 can only flow into the pushing bin 110.

As shown in fig. 24, in some embodiments, the liquid seal structure 620 includes an outer sleeve 621 and an inner sleeve 622. The inner sleeve 622 is connected and communicated with the pushing bin 110, the outer sleeve 621 is sleeved outside the inner sleeve 622, the bottom of the outer sleeve 621 is closed, and an opening is formed in the bottom of the inner sleeve 622, so that the outer sleeve 621 is communicated with the inner sleeve 622 through the bottom opening. The air inlet pipe 610 is fixed in the inner sleeve 622, the top of the air inlet pipe 610 forms an outlet, the outlet is located in the inner sleeve 622, the bottom of the air inlet pipe 610 forms an inlet, and the inlet of the air inlet pipe 610 is located outside the outer sleeve 621.

Wherein 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 air entering the air inlet pipe 610 can only enter the pushing bin 110 through the top of the inner sleeve 622 through the top opening thereof. In some embodiments, the sealing liquid is deionized water to avoid corrosion of the liquid seal 620 by the sealing liquid.

In some embodiments, the liquid seal 620 further includes a liquid inlet 623, the liquid inlet 623 being disposed on the outer sleeve 621, the liquid inlet 623 being configured to deliver sealing liquid into the liquid seal 620. In some embodiments, the liquid sealing structure 620 further includes an overflow pipe 624, the overflow pipe 624 is disposed on the outer sleeve 621, and the overflow pipe 624 is located below the outlet of the air inlet pipe 610, so as to ensure that a proper amount of sealing liquid is stored in the liquid sealing device, and prevent the sealing liquid from exceeding the outlet of the air inlet pipe 610 and blocking the air inlet pipe 610.

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 here. In some embodiments, the transmission shaft 130 is the same as the transmission shaft 320 in the rotary switching device 300, and will not be described here.

In some embodiments, the power assembly 120 is disposed outside the feeding hot chamber 3, so as to avoid the power assembly 120 from being exposed to radioactive radiation to affect normal operation. Further, the transmission shaft 130 penetrates through the wall of the feeding hot chamber 3, so that the power provided by the power assembly 120 outside the feeding hot chamber 3 is transmitted to the chain assembly 140 in the feeding hot chamber.

In some embodiments, the power assembly 310, the drive shaft 320 of the rotary switching device 300 and the power assembly 120, the drive shaft 130 of the pushing device 100 are disposed on the same side of the pushing bin 110 and the rotary bin 20 to compactly arrange the various components, thereby reducing the footprint of the feeding system 40.

As shown in fig. 19, 25 and 26, in some embodiments, the chain assembly 140 includes a chain case 141, a sprocket 142 and a chain 143. The pushing bin 110 is carried on the chain case 141, and the pushing bin 110 is in communication with the chain case 141. The sprocket 142 is disposed in the pushing bin 110, the sprocket 142 is connected with the transmission shaft 130, and the transmission shaft 130 is used for driving the sprocket 142 to rotate. The chain 143 movably sets up in the chain case 141, and the one end of chain 143 is connected with the propelling movement subassembly 150 in the propelling movement feed bin 110 to the chain 143 cooperatees with sprocket 142, makes sprocket 142 rotatory can drive the chain 143 removal, and then drives propelling movement subassembly 150 and remove, and propelling movement subassembly 150 removes and can promote the spent fuel subassembly and remove in rotatory feed bin 20, thereby realizes the propelling movement of spent fuel subassembly.

In some embodiments, sprocket 142 includes a sprocket shaft 1421 and a sprocket body 1422. The sprocket shaft 1421 is connected to a drive shaft 130, and the drive shaft 130 is used to drive the sprocket shaft 1421 to rotate. The sprocket body 1422 is sleeved outside the sprocket shaft 1421, the sprocket shaft 1421 is used for driving the sprocket body 1422 to rotate, the sprocket body 1422 is matched with the chain 143, and the sprocket body 1422 rotates to drive the chain 143 to move.

As shown in fig. 19 and 20, in some embodiments, the pushing device 100 further includes a coupling 160, the coupling 160 being 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 rotary switching device 300, and will not be described here.

As shown in fig. 26, in some embodiments, the sprocket 142 is provided with a plurality of receiving grooves 1423, the plurality of receiving grooves 1423 are uniformly distributed along the circumference of the sprocket 142, and pins of the chain 143 are engaged with the receiving grooves 1423, so that the sprocket 142 rotates to drive the chain 143 to move. In some embodiments, a receiving groove 1423 is provided to the sprocket body 1422. When the sprocket 142 rotates, the pin shaft positioned in the accommodating groove 1423 moves along with the rotation of the sprocket 142, thereby driving the chain 143 to move; at the same time, the movement of the chain 143 drives the pin shaft at the rear into the receiving groove 1423 of the sprocket 142, so that the chain 143 can move continuously. In addition, the inner side surface of the receiving groove 1423 is inclined so that the pin shaft is easily inserted into the receiving groove 1423.

In some embodiments, the inside of the chain case 141 is provided with a rail, the chain 143 is provided to the rail, and the chain 143 is movable along the rail.

As shown in fig. 25 and 26, in some embodiments, the push assembly 150 includes a push connection 151 and a push 152. The pushing connection portion 151 is disposed in the pushing bin 110, the pushing connection portion 151 is connected with a chain 143 of the chain assembly 140, and the chain 143 is used for driving the pushing connection portion 151 to move in the pushing bin 110 and the rotating bin 20. The pushing part 152 is detachably connected with the pushing connection part 151, the pushing connection part 151 is configured to push the pushing part 152 to move, and the pushing part 152 is used for pushing the spent fuel assembly. In this embodiment, the pushing portion 152 is used to push the spent fuel assembly, so that the pushing force is applied to the spent fuel assembly, and the spent fuel assembly is moved.

In some embodiments, as shown in fig. 27, a connection protrusion 1511 is disposed at an end of the push connection portion 151 away from the chain 143, as shown in fig. 28, a connection groove 1521 is disposed on the push portion 152, and the connection protrusion 1511 is matched with the connection groove 1521, so that the push connection portion 151 is detachably connected with the push portion 152, thereby realizing quick assembly and disassembly of the push connection portion 151 and the push portion 152, and facilitating replacement of the push portion 152.

In some conditions, such as when the shearing device fails, the spent fuel assembly fed to the shearing device needs to be removed, at which point the pushing portion 152 may be replaced with a gripping portion that grips the spent fuel assembly to facilitate moving the spent fuel assembly back into the rotating silo 20. In this embodiment, the pushing portion 152 is convenient to replace by quick assembly and disassembly of the pushing connection portion 151 and the pushing portion 152.

In some embodiments, the push connection 151 includes a push body 1512 and a connection protrusion 1511, the connection protrusion 1511 being disposed at a bottom of the push body 1512. Meanwhile, a connection groove 1521 is provided at the bottom of the push portion 152, and the connection protrusion 1511 is matched with the connection groove 1521, and the connection protrusion 1511 is received in the connection groove 1521 to detachably connect the push connection portion 151 with the push portion 152. When the pushing part 152 needs to be replaced, the pushing connection part 151 does not need to be detached, and the pushing connection part 151 and the pushing part 152 can be detached only by lifting the pushing part 152 upwards.

As shown in fig. 27 and 28, in some embodiments, the push connection portion 151 is provided with rollers 1513, and a plurality of rollers 1513 are symmetrically disposed on two sides of the push connection portion 151, so that friction is reduced during movement of the push connection portion 151, and movement is smoother. In some embodiments, the pushing portion 152 is also provided with rollers 1522, and the plurality of rollers 1522 are symmetrically disposed on both sides of the pushing portion 152.

As shown in fig. 28, in some embodiments, the pushing portion 152 includes a moving portion 1523, a connecting rod 1524 and a pushing head 1525, the moving portion 1523 is detachably connected to the pushing connection portion 151, and the roller 1522 is disposed on the moving portion 1523 to reduce friction between the pushing portion 152 and the pushing bin 110 or the rotating bin 20. The connecting rod 1524 is connected between the moving portion 1523 and the pushing head 1525, so as to fix the pushing head 1525 at an end of the moving portion 1523 away from the pushing connection portion 151, where the pushing head 1525 is used for pushing the spent fuel assembly. In some embodiments, the push head 1525 matches the shape of the spent fuel assembly to evenly transfer the pushing force to the spent fuel assembly, facilitating pushing the spent fuel assembly to move in the rotating silo 20.

As shown in fig. 19, in some embodiments, the pushing bin 110 is disposed on the chain case 141, and a connection port is disposed at the bottom of the pushing bin 110, and the connection port is used for communicating the pushing bin 110 with the chain case 141, so that the chain 143 moves into the pushing bin 110 via the connection port. Wherein the end of the chain 143 connected to the pushing assembly 150 is disposed within the pushing bin 110 such that the chain 143 remains connected to the pushing assembly 150.

As shown in fig. 26, in some embodiments, the pushing device 100 further includes a pushing-limit detection member 170, where the pushing-limit detection member 170 is disposed in the pushing bin 110, and the pushing-limit detection member 170 is configured to detect whether the pushing assembly 150 is retracted into place. As shown in fig. 27, the push connection portion 151 is provided with a limit detection trigger portion 1514, and the push limit detection member 170 is provided to generate an in-place signal when in contact with the limit detection trigger portion 1514. Specifically, the limit detection trigger portion 1514 may be disposed on the push connection portion 151, and the limit detection trigger portion 1514 may be a trigger bump protruding from the surface of the push connection portion 151.

In some embodiments, after the spent fuel assembly is fully pushed into the shearing apparatus, the chain 143 and the push assembly 150 are retracted to the initial position and the push limit detector 170 is used to detect whether the push assembly 150 is retracted into position. In some embodiments, the push limit detector 170 may be a pneumatic sensor, and when the limit detection trigger 1514 on the push assembly 150 collides with the pneumatic sensor in the push bin 110, the pressure of the air path in the pneumatic sensor changes, thereby triggering the push limit detector 170 to generate an in-place signal.

As shown in fig. 26, in some embodiments, a push stop 180 is disposed within the push bin 110, the push stop 180 cooperating with the push assembly 150 to limit the position of the chain 143 for retraction. In some embodiments, the push limiter 180 mates with the push link 151 to limit the push assembly 150 from continuing to move toward the sprocket 142, thereby limiting the limit position of the chain 143 for retraction, avoiding complete retraction of the chain 143 into the inner chain case 144. Meanwhile, the pushing limiting piece 180 can also provide a standard zero position for the stroke calibration of the power assembly 120, so that the stroke calibration of the power assembly 120 is facilitated.

In some embodiments, the push limiter 180 may be a limit stop that may cooperate with the push body 1512 of the push link 151 to limit the limit position of the retraction of the push assembly 150. As shown in fig. 26, the push body 1512 is supported above the connection protrusion 1511, and the push stopper 180 is disposed below the push body 1512, and when the push assembly 150 is retracted to the limit position, the connection protrusion 1511 contacts the push stopper 180, and the push stopper 180 blocks the connection protrusion 1511 from retracting, thereby limiting the chain 143 from continuing to retract.

In some embodiments, the shearing device 50 within the shearing thermal chamber 4 may shear the spent fuel assembly. The step S600 includes the following steps S601 to S603 when cutting the spent fuel assembly.

S601: and shearing the first end head, collecting the sheared first end head, and cleaning after collecting.

S602: cutting the spent fuel active section to a predetermined length.

S603: after the spent fuel active section is sheared, the second end is collected and cleaned.

S604: and transferring the cleaned first end and second end to a heat treatment chamber for treatment.

In this embodiment, the first end, the spent fuel active section and the second end of the spent fuel assembly are sheared according to the sequence, and the first end, the spent fuel active section and the second end are collected separately, so that the three are convenient for different subsequent treatments. In addition, the spent fuel active section is sheared to a preset length, so that subsequent dissolution treatment is facilitated.

In some embodiments, when the spent fuel active section is sheared in step S602, a value of the predetermined length may be determined according to a dissolution requirement, which is beneficial to controlling a dissolution rate when the spent fuel active section is dissolved, and avoiding too fast or too slow dissolution rate.

In some embodiments, the push distance of the feed system 40 may be controlled such that the feed system 40 pushes the first head or a predetermined length of spent fuel active section to a shearing position to facilitate shearing the first head or shearing the spent fuel active section to a predetermined length. Specifically, the chain assembly 140 in the feeding system 40 can realize stepping movement, and the pushing distance of the spent fuel assembly can be precisely controlled by controlling the moving distance of the chain assembly 140, so that the spent fuel assembly can enter the shearing device 50 with a preset length, and the spent fuel active section can be sheared into small short sections with preset lengths conveniently.

In some embodiments, in step S600, the spent fuel assembly is compressed in a horizontal direction for a predetermined length of spent fuel assembly, and then the spent fuel assembly is sheared horizontally for that length. Compared with the conventional pressurized water reactor spent fuel assembly in which the fuel rods are restrained by a plurality of grids, the stainless steel spent fuel assembly is restrained by the grids only at the lower part, and the active part of the spent fuel assembly can be prevented from leaking out of the outer sleeve by compacting the spent fuel assembly during shearing.

As shown in fig. 29 and 30, in some embodiments, the shearing device 50 within the shearing thermal chamber 4 may comprise: the case 410, the stationary knife assembly 420, the pressing assembly 430, and the movable knife assembly 440. The box 410 is formed with a feed inlet 4121, the feed inlet 4121 is connected with the second transition bin 32 in a sealing way, the fixed knife assembly 420 is fixed in the box 410, and the fixed knife assembly 420 is matched with the shape of the spent fuel assembly and is used for bearing the spent fuel assembly. The compressing assembly 430 is movably disposed in the case 410, and the compressing assembly 430 and the fixed blade assembly 420 are correspondingly disposed on two sides of the feed inlet 4121, and the compressing assembly 430 can move relative to the fixed blade assembly 420, so as to compress the spent fuel assembly to the fixed blade assembly 420. The movable knife assembly 440 is movably disposed in the case 410, the moving direction of the movable knife assembly 440 is parallel to the moving direction of the compressing assembly 430, and the movable knife assembly 440 is parallel to the fixed knife assembly 420, wherein when the movable knife assembly 440 moves towards the fixed knife assembly 420, the movable knife assembly 440 cooperates with the fixed knife assembly 420 for shearing the spent fuel assembly.

In the shearing device 50 of the embodiment, the fixed knife assembly 420 is matched with the shape of the spent fuel assembly, so that the fixed knife assembly 420 can bear the spent fuel assembly and compress the spent fuel assembly in the fixed knife assembly 420 through the compressing assembly 430, thereby stably fixing the spent fuel assembly, avoiding displacement of the spent fuel assembly in the shearing process, and facilitating the cooperation of the movable knife and the fixed knife to shear the spent fuel assembly.

As shown in fig. 31, the feed port 4121 is provided on the side of the housing 410 and the spent fuel assembly is fed horizontally into the shearing device 50. In some embodiments, the feed port 4121 matches the shape of the spent fuel assembly, which moves in its axial direction and is fed from the feed port 4121 into the tank 410. The compressing component 430 and the fixed knife component 420 are arranged at two sides of the feed inlet 4121 along the horizontal direction, and the moving direction of the compressing component 430 and the movable knife component 440 is perpendicular to the axial direction of the spent fuel component, so that after the spent fuel component is fed into the box 410, the spent fuel component is compressed on the fixed knife component 420 through the compressing component 430, and the displacement of the spent fuel component in the shearing process is avoided.

In addition, the fixed knife assembly 420 and the movable knife assembly 440 are arranged in parallel in the horizontal direction, and the movable knife assembly 440 is arranged at one side of the compression assembly 430 away from the feed inlet 4121, and the knife edge of the movable knife assembly 440 is opposite to the knife edge of the fixed knife assembly 420, so that when the movable knife assembly 440 moves towards the fixed knife assembly 420, the shearing of the spent fuel assembly can be realized.

The shearing device 50 in the embodiment can realize horizontal shearing of the spent fuel assembly. Compared with the traditional vertical shearing machine, the movable knife and the fixed knife are prevented from being arranged in the vertical direction, the possibility that the uncleaved spent fuel assembly falls off during vertical feeding shearing is also avoided, the shearing safety and reliability of the spent fuel assembly are improved, and the processing efficiency of the spent fuel assembly is improved.

As shown in fig. 31, in some embodiments, the stationary blade assembly 420 includes a stationary blade mounting portion 421 and a stationary blade 422, the stationary blade mounting portion 421 is fixed in the case 410, the stationary blade 422 is mounted on the stationary blade mounting portion 421, and a first accommodating groove matching the shape of the spent fuel assembly is provided at the blade edge of the stationary blade 422, and the first accommodating groove is used for accommodating at least part of the spent fuel assembly.

As shown in fig. 31, a fixed blade bearing portion 414 is disposed in the case 410, the fixed blade bearing portion 414 is fixed in the case 410, a fixed blade accommodating groove is disposed on the fixed blade bearing portion 414, and the fixed blade assembly 420 is mounted in the fixed blade accommodating groove. In some embodiments, the stationary blade carrier 414 is further provided with a spent fuel channel corresponding to the feed channel 412, and the stationary blade assembly 420 may carry the spent fuel assembly to facilitate shearing thereof when the spent fuel assembly is pushed into the spent fuel channel.

As shown in fig. 31, in some embodiments, the hold-down assembly 430 includes a hold-down moving portion 432 and a hold-down portion 433. The compressing and moving part 432 is disposed in the case 410, the compressing and moving part 432 and the fixed knife assembly 420 are disposed at two sides of the feed inlet 4121, the compressing part 433 is fixed at one end of the compressing and moving part 432, the compressing and moving part 432 is used for driving the compressing part 433 to move, and the compressing part 433 is used for compressing the spent fuel assembly in the fixed knife assembly 420. For example, the compressing portion 433 corresponds to the first accommodating groove of the fixed blade 422, so that the compressing portion 433 can compress the spent fuel assembly in the first accommodating groove, and limit the spent fuel assembly.

As shown in fig. 31, in some embodiments, the movable blade assembly 440 includes a movable blade mount 442 and a movable blade 443. The movable blade mounting portion 442 is disposed in the case 410, the movable blade 443 is fixed to the movable blade mounting portion 442, and 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 knife edge of the movable knife 443 corresponds to the knife edge of the fixed knife 422, so as to realize the shearing of the spent fuel assembly.

As shown in fig. 29, in some embodiments, the shearing device 50 may further include a hydraulic drive 1200 coupled to the hold-down assembly 430 and the movable blade assembly 440, respectively, for driving the hold-down assembly and the movable blade assembly 440, respectively, in motion. The hydraulic driving device 1200 is arranged outside the box body of the shearing device 50, so that dust pollution generated when the shearing device is sheared in the box body 410 is avoided, nuclear radiation of the spent fuel assembly is avoided, normal operation of the hydraulic driving device and the box body is ensured, and shearing reliability of the spent fuel assembly is improved.

As shown in fig. 31, the hydraulic driving device 1200 includes two driving parts 1201, and the two driving parts 1201 are respectively connected with the compression assembly 430 and the movable cutter assembly 440, so that the two driving parts 1201 can be respectively connected with the compression moving part 432 and the movable cutter mounting part 442 in the shearing device 50 to drive the compression moving part 432 and the movable cutter mounting part 442 to move, thereby achieving compression and shearing of the spent fuel assembly.

As shown in fig. 29, in some embodiments, the shearing system may further include a stand 30, where the housing 410 of the shearing device 50 is disposed on the stand 30, and the stand 30 is used to support the shearing device 50 to ensure the stability of the operation of the shearing device 50.

As shown in fig. 1, in some embodiments, a tip receiving receptacle 60 is provided within the shear heat chamber 4 for receiving the sheared first and second tips. The shearing heat chamber 4 is adjacent to the treatment heat chamber 5 and is in communication with the same through a shield door 41, and the tip receiving container 60 can be transferred into the treatment heat chamber 5 via the shield door 41 to treat the first tip and the second tip in the treatment heat chamber 5.

Specifically, in step S601, after shearing the first tip, the tip receiving container 60 collects the sheared first tip; after the spent fuel active section is sheared in step S603, the second end is collected by the end receiving container 60, and the collected first end and second end are cleaned, and in step S604, the end receiving container 60 is transferred into the heat treatment chamber 5, so that the first end and the second end are transferred into the heat treatment chamber 5 and treated. Thus, the collection, cleaning and transferring processes of the first end and the second end are realized.

In some embodiments, step S604 includes the steps of:

S6041: transferring the first end and the second end to a treatment heat chamber 5;

s6042: shearing the second end to a predetermined length in the heat treatment chamber 5;

s6043: and collecting the sheared second end head and the sheared first end head, and treating solid waste after collecting.

In this embodiment, the solid waste of spent fuel is radioactive, and the volume of the treated solid waste is limited when it is treated. The length of the second end of the spent fuel assembly exceeds the length of the existing treatment place, and the second end is sheared in the embodiment so as to facilitate the subsequent solid waste treatment.

As shown in fig. 1, in some embodiments, a tip processing device 70 is disposed within the processing chamber 5, the tip processing device 70 being configured to shear the second tip to a predetermined length.

In some embodiments, as shown in fig. 1, the shearing device 50 is coupled to a dissolver 80, and in particular, may be in communication through a dissolver chute 81. In step S602, the spent fuel active segments sheared by the shearing device 50 may fall into the dissolver chute 81 and into the underlying dissolver 80 via the dissolver chute 81 to facilitate subsequent dissolution treatment of the sheared spent fuel fragments.

As shown in fig. 31, in some embodiments, the compression assembly 430 and the movable blade assembly 440 are movably supported on a side wall of the case 410, and a discharge port is formed at the bottom of the case 410, and is used for discharging the sheared first end, second end and spent fuel active section for collecting and subsequent processing.

As shown in fig. 29, in some embodiments, the shearing system may further comprise: the shearing trap 1000, the shearing trap 1000 is arranged below the shearing device 50, and as shown in fig. 32, a connection port 1010 is formed at the top of the shearing trap 1000, and the connection port is connected with a discharge port at the bottom of the box 410 in a sealing manner. Wherein, an outlet is formed at the bottom of the shearing trap 1000, the outlet corresponds to the connection port 1010, the outlet is connected with the dissolver 80 through the dissolver chute 81, and the sheared spent fuel active section falls into the shearing trap 1000 and is collected in the dissolver 80.

In this embodiment, the connection port 1010 of the shearing trap 1000 is hermetically connected with the discharge port at the bottom of the box 410 of the shearing device 50, so that a closed space is formed between the shearing trap 1000 and the shearing device 50, which avoids the scattering of dust during the shearing operation, effectively controls the scattering of dust in the limited shearing trap space, and avoids the scattering of dust to the outside.

As shown in fig. 32, in some embodiments, the tip receiving container 60 is movably disposed within the shear well 1000, the tip receiving container 60 being configured to move between a receiving station a below the connection port and a purge transfer station b remote from the connection port and the outlet. Wherein, as shown in fig. 32, when the shearing device 50 shears the first end of the spent fuel assembly or after the shearing of the spent fuel active section is completed, the end receiving container 60 moves to the receiving station a to receive the sheared first end or second end; as shown in fig. 33, as the shearing device 50 shears the spent fuel active section, the head receiving receptacle 60 moves to the purge transfer station b so that the sheared spent fuel active section is collected into the dissolver 80 via the outlet.

As shown in fig. 34, in some embodiments, a fluid seal groove 1040 is formed at the edge of the connection port 1010 of the shear well 1000, the fluid seal groove 1040 being configured to receive a sealing fluid. 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 tank 1040, so that the gap between the shearing trap 1000 and the shearing device 50 is sealed, and dust is prevented from diffusing to the outside.

As shown in fig. 32, the liquid seal tank 1040 is a square and annular water tank, and a through hole at the center of the water tank is used to communicate the shearing device 50 and the shearing trap 1000. The water tank is used for containing water to seal the junction of the shearing device 50 and the shearing trap 1000.

As shown in fig. 32 and 33, the shear well 1000 in the present embodiment includes a receiving portion 1030, a first shear well 1050, and a second shear well 1060. The tip receiving receptacle 60 is movably disposed in the receptacle 1030, and both the first cutout well 1050 and the second cutout well 1060 are connected to the bottom of the receptacle 1030 and communicate with the receptacle 1030. The first shearing trap 1050 is disposed corresponding to the connection port 1010, and the discharge port 1070 is disposed at the bottom of the first shearing trap 1050 and is used for docking with the dissolver chute 81, so as to transfer the spent fuel active section sheared by the shearing device 50 to the dissolver 80. A second shear trap 1060 is provided at the cleaning transfer station b for collecting the wastewater after flushing the first and second ends.

As shown in fig. 32 and 33, the first shearing trap 1050 in this embodiment is funnel-shaped, the bottom of the first shearing trap 1050 is connected with a liquid seal tube 1051, and the liquid seal tube 1051 is used for docking with the dissolver chute 81, so as to realize the sealing connection between the shearing trap 1000 and the dissolver chute 81, and form a closed space between the shearing device 50 and the dissolver 80, so as to prevent dust from diffusing. In this embodiment, the first shear trap 1050 is configured as a funnel shape, and the spent fuel active segments falling to any position in the first shear trap 1050 easily slide into the dissolver 80 below, so as to facilitate collection of the spent fuel active segments.

In this embodiment, when the shearing device 50 shears the first end, the end receiving container 60 is located at the receiving station b, and at this time, the sheared first end falls down and is collected in the end receiving container 60. After the completion of the receiving, the tip receiving receptacle 60 moves to the cleaning transfer station b. When the shearing device 50 shears the spent fuel active section, the end receiving container 60 is located at the cleaning and transferring station b, and the sheared spent fuel active section can fall into the first shearing trap 1050 and enter the dissolver 80 communicated with the dissolver chute 81 through the dissolver chute 81 for subsequent dissolution, so that the classified collection and treatment of the end and the spent fuel active section are realized.

In some embodiments, a cover 1031 is removably attached to the top of the receptacle, the cover 1031 is positioned to correspond to the second shear well 1060, and a shower purge system is attached to the cover 1031. After the first end and the second end are collected by the end receiving container 60, the first end and the second end are sprayed and cleaned by the spraying and cleaning system, and the cleaned waste liquid flows out through the through hole at the bottom of the end receiving container 60 and flows into the second shearing trap 1060 below, and the washed waste water is collected by the second shearing trap 1060. After the cleaning is completed, the top cover 1031 may be opened, and the end receiving container 60 may be lifted out and transferred into the treatment chamber 5 for subsequent treatment.

In this embodiment, when cutting the spent fuel assembly, the feed system 40 first pushes the first end into the cutting apparatus 50 to a specified position. The tip receiving receptacle 60 enters the receiving station a. The shearing device 50 shears the first head, and after the first head falls into the head receiving container 60, the head receiving container 60 is retracted to the cleaning transfer station b.

After the first end is sheared, the feeding system 40 pushes the spent fuel assembly to the shearing device 50 according to a preset length, so that shearing of the spent fuel active section is alternately completed through feeding, shearing and feeding steps, and sheared crushed aggregates fall into the dissolver chute 81.

After the spent fuel active section is sheared, after the dust fall of the shearing trap 1000 is finished, the end receiving container 60 is pushed to the discharge port of the shearing device 50, namely the receiving station a, the second end is pushed into the shearing trap 1000 by the feeding system 40 and falls into the end receiving container 60, and the end receiving container 60 is retracted to the cleaning and transferring station b. To this end, the shearing operation of 1 spent fuel assembly was completed.

While the shearing device 50 executes the shearing task, the lifting and overturning system synchronously prepares materials to finish the underwater transportation, lifting, overturning and other processes of the next spent fuel assembly.

After the shearing device 50 completes the batch processing task of the spent fuel assembly, the spraying and purging system on the cover 1031 is controlled to spray and clean the end, and then the end receiving container 60 with the end is lifted to the processing heat chamber 5 by a crane.

The end is processed into end crushed aggregates meeting the requirements by an end processing device 70 in the processing heat chamber 5, and the end crushed aggregates are filled into a waste bucket for collection and transportation, so that the subsequent processing is facilitated.

In some embodiments, the air pressure of the feeding hot chamber 2 is set to be higher than the air pressure of the feeding hot chamber 3, and the air pressure of the feeding hot chamber 3 and the air pressure of the processing hot chamber 5 are set to be higher than the air pressure of the shearing hot chamber 4, so that air pressure gradients among different hot chambers are formed, the trend of radioactive substances after the spent fuel assembly is destroyed is ensured to be protected, and radioactive aerosol generated in the shearing hot chamber 4 is prevented from entering the adjacent feeding hot chamber 3 and the processing hot chamber 5.

As shown in fig. 1, in some embodiments, the air pressure of each heat chamber may be controlled using flow control of the supply and exhaust air of each heat chamber.

As shown in fig. 1, in some embodiments, the treatment heat chamber 5 is adjacent to the maintenance heat chamber 6, and the treatment heat chamber 5 is in communication with the maintenance heat chamber 6 through a shield door 51. When the shearing device 50 or the end treatment device 70 needs to be repaired or replaced, the parts to be repaired can be transported to the repair hot chamber 6 through the shield door 51 for repair.

It should also be noted that, in the embodiments of the present invention, the features of the embodiments of the present invention and the features of the embodiments of the present invention may be combined with each other to obtain new embodiments without conflict.

The present invention is not limited to the above embodiments, but the scope of the invention is defined by the claims.

Claims (10)

1. The utility model provides a broken processing method of spent fuel subassembly, spent fuel subassembly includes first end, second end, spent fuel active segment and outer tube, first end with the second end with outer tube is at its both ends fixed connection, spent fuel active segment set up in the outer tube, the length of first end is less than the length of second end, its characterized in that includes the following step:

s100: picking up a spent fuel assembly from a spent fuel assembly pool;

s200: transferring the spent fuel assembly from a spent fuel assembly pool to a loading 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 head is higher than the position of the second end head in the first attitude;

s300: pushing the spent fuel assemblies in the feeding hot chamber to the feeding hot chamber;

s400: closing a channel between the feeding hot chamber and the feeding hot chamber;

s500: rotating the spent fuel assembly within the feedheat chamber to transform the spent fuel assembly from a second attitude to a third attitude, and the spent fuel assembly is transported to a shear feed location;

s600: and conveying the spent fuel assembly to a shearing position for shearing.

2. The crushing processing method according to claim 1, further comprising, in step S600, the steps of:

S601: shearing the first end head, collecting the sheared first end head, and cleaning after collecting;

S602: shearing the spent fuel active section to a predetermined length;

S603: collecting the second end after cutting the spent fuel active section, and cleaning the second end;

s604: and transferring the cleaned first end and the second end to a treatment hot chamber for treatment.

3. A crushing processing method according to claim 2, wherein, in step S602,

The value of the predetermined length is determined according to the dissolution requirement.

4. The crushing processing method according to claim 2, characterized by further comprising, in step S604:

s6041: transferring the first and second ends to the heat treatment chamber;

s6042: shearing the second end head to a predetermined length within the process chamber;

s6043: and collecting the sheared second end head and the sheared first end head, and treating solid waste after collecting.

5. A crushing processing method according to claim 2, wherein, in the step S600,

The method comprises the steps of compacting the spent fuel assembly in the horizontal direction for a predetermined length of the spent fuel assembly, and then horizontally shearing the spent fuel assembly in the length.

6. The crushing processing method according to claim 1, characterized by further comprising, at step S200:

grabbing the first end head, and lifting the spent fuel assembly to leave a shielding water layer;

Draining the spent fuel assembly before entering the loading hot chamber;

After the spent fuel assembly is drained, changing its pose from the first pose to the second pose.

7. A crushing treatment method according to claim 1, wherein,

The air pressure of the feeding hot chamber is higher than that of the feeding hot chamber, and the air pressure of the feeding hot chamber and the air pressure of the treatment hot chamber are higher than that of the shearing hot chamber.

8. A crushing treatment method according to claim 7, wherein,

The air pressure of each hot chamber is controlled by the flow control of the air supply and the air exhaust of each hot chamber.

9. A crushing treatment method according to claim 1, wherein,

In step S600, the shearing process is performed in a closed environment of the shearing device, and the air flow control is performed to cool the spent fuel assembly, so as to avoid the step that the sheared radioactive product enters the preamble.

10. A crushing treatment method according to claim 1, wherein,

In step S500, the rotation is performed by eccentric rotation.