Transferring and ejecting device of spent fuel assembly, processing method and post-processing system

Abstract

The invention discloses a spent fuel assembly transfer and ejection device, a treatment method and a post-treatment system, which can realize the transfer of a spent fuel assembly and the ejection of a fuel rod in the spent fuel assembly through one device, and reduce the difficulty of shearing the fuel rod. The transfer and ejection device for the spent fuel assembly comprises a mounting seat (2), a moving trolley (3) and an ejection assembly. The moving trolley (3) is arranged on the mounting seat (2) in a sliding manner; a first clamping groove is formed in the moving trolley (3) and used for containing a spent fuel assembly (4). The ejection assembly is arranged on the moving trolley (3) and used for fixing the spent fuel assembly (4) with the end removed and ejecting a fuel rod in the spent fuel assembly (4).

Description

Technical Field

[0001] The invention belongs to the technical field of spent fuel assembly processing, and in particular relates to a spent fuel assembly transfer and ejection device and a processing method, and a post-processing system. Background Art

[0002] The post-processing process of spent fuel assemblies involves the transfer and shearing process of spent fuel assemblies, that is, after the spent fuel assemblies are transferred to the designated location, the fuel rods of the spent fuel assemblies are sheared into shorter materials by a shearing device.

[0003] In the prior art, there is no equipment that can simultaneously transport and shear spent fuel assemblies. The transport process of spent fuel assemblies is achieved by a separate transport device, and the shearing process of spent fuel assemblies is achieved by a separate shearing device. The large number of processes leads to low processing efficiency of spent fuel assemblies. And because the spent fuel assembly includes an outer sleeve, the outer sleeve is generally made of high-strength stainless steel, which increases the difficulty of shearing the fuel rods. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a spent fuel assembly transfer and ejection device and processing method, and a post-processing system in view of the above-mentioned deficiencies in the prior art, which can realize the transfer of spent fuel assemblies and the ejection of fuel rods in the spent fuel assemblies through the same device, thereby reducing the difficulty of shearing the fuel rods.

[0005] In the first aspect, an embodiment of the present invention provides a spent fuel assembly transfer and ejection device, the spent fuel assembly transfer and ejection device comprising a mounting seat, a moving trolley and an ejection assembly. The moving trolley is slidably arranged on the mounting seat; the moving trolley is provided with a first card slot, the first card slot is used to place the spent fuel assembly. The ejection assembly is arranged on the moving trolley, and is used to fix the spent fuel assembly after the end head is removed, and to eject the fuel rods in the spent fuel assembly.

[0006] In some embodiments, the ejection assembly includes an ejection frame, a first driving member, and an ejector rod. The ejection frame is fixed on the moving trolley, and is used to fix the spent fuel assembly after the end head is removed. The first driving member is arranged on the side of the moving trolley opposite to the ejection frame; the first driving member is connected to the ejector rod, and is used to drive the ejector rod to move. The ejector rod is arranged between the first driving member and the ejection frame, and is used to extend into the outer sleeve of the spent fuel assembly after the end head is removed under the drive of the first driving member to eject the fuel rods in the spent fuel assembly.

[0007] In some embodiments, the ejection frame includes a card plate and a first top plate; the card plate is located in the middle of the ejection frame, and a second card slot is formed in the upper part of the card plate, and the second card slot is used to place the spent fuel assembly after the end head is removed; the first top plate is located at the end of the ejection frame away from the ejector rod, and a third card slot is provided on the side of the first top plate facing the ejector rod, and a through hole for the fuel rod to pass through is provided at the bottom of the third card slot. After the spent fuel assembly after the end head is removed is placed in the second card slot, the outer sleeve of the spent fuel assembly enters the third card slot and abuts against the first top plate.

[0008] In some embodiments, a caliper is provided on the ejection frame, and the caliper is used to fix the spent fuel assembly after the end head is removed.

[0009] In some embodiments, two guide rails are arranged in parallel on the upper part of the mounting seat. A plurality of wheel assemblies are arranged at the bottom of the mobile vehicle, and at least one wheel assembly is arranged on each guide rail. Each wheel assembly includes a first wheel and a second wheel; the first wheel is rollingly arranged on the upper surface of the corresponding guide rail, and the second wheel is rollingly arranged on the outer surface of the corresponding guide rail.

[0010] In some embodiments, the mounting base includes two vertically arranged support columns, the two guide rails are respectively fixed to the top ends of the two support columns, and the inner edges of the guide rails exceed the inner edges of the support columns. A plurality of anti-tilt blocks are arranged at the bottom of the mobile vehicle, and at least two of the anti-tilt blocks are relatively arranged between the two guide rails; the portion of each anti-tilt block located under the guide rail is bent outward to form a bent portion, and each of the bent portions extends to the bottom of the corresponding guide rail.

[0011] In some embodiments, the guide rail is provided with a plurality of through slots, and the through slots enable the bent portion of the anti-roll block to pass through. When the mobile vehicle moves to the first position on the guide rail, in the vertical direction, the plurality of through slots overlap with the positions of the bent portions of the anti-roll blocks.

[0012] In some embodiments, a limit baffle is provided at the end of the guide rail, and the limit baffle is used to limit the first wheel located at the end of the moving vehicle.

[0013] In some embodiments, the spent fuel assembly transfer and ejection device further comprises a second driving member. The second driving member is disposed on the mounting seat and is used to drive the moving trolley to move.

[0014] Therefore, the transport and ejection device of the spent fuel assembly provided by the embodiment of the present invention can place the spent fuel assembly in the first slot by slidingly setting the moving trolley on the mounting seat and setting the first slot on the moving trolley, so that the moving trolley drives the spent fuel assembly to move, so as to facilitate the removal of the end of the spent fuel assembly after the spent fuel assembly is transported to the preset position. By setting the ejection assembly on the moving trolley, the spent fuel assembly after the end is removed can be fixed by the ejection assembly, and the fuel rods in the spent fuel assembly can be ejected, thereby avoiding the outer sleeve of the spent fuel assembly affecting the shearing of the fuel rods and reducing the difficulty of shearing the fuel rods. And the transport and ejection device of the spent fuel assembly can realize the transport of the spent fuel assembly and the ejection function of the fuel rods in the same device at the same time, which is conducive to improving the efficiency of processing the spent fuel assembly.

[0015] In a second aspect, an embodiment of the present invention further provides a post-processing system, which includes the spent fuel assembly transfer and ejection device, a power hand special tooling, and a cutting device in the first aspect. The power hand special tooling is used to grab the spent fuel assembly transferred by the spent fuel assembly transfer and ejection device, transfer it to the cutting device, and transfer the spent fuel assembly on the cutting device after the end is removed to the ejection assembly. The cutting device is used to remove the end of the spent fuel assembly.

[0016] In the third aspect, the embodiment of the present invention also provides a method for processing a spent fuel assembly, which uses the spent fuel assembly transfer and ejection device in the first aspect. The method comprises: placing the spent fuel assembly in the first slot of the moving trolley; the moving trolley drives the spent fuel assembly to move to the second position; removing the end of the spent fuel assembly by a cutting device; fixing the spent fuel assembly after the end is removed in an ejection assembly, and ejecting the fuel rods in the spent fuel assembly by the ejection assembly.

[0017] The post-processing system and the method for processing a spent fuel assembly provided by the embodiments of the present invention have the same beneficial effects as the above-mentioned spent fuel assembly transfer and ejection device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : A structural diagram of a spent fuel assembly transfer and ejection device provided in an embodiment of the present invention;

[0019] Figure 2 : A structural diagram of another spent fuel assembly transfer and ejection device provided in an embodiment of the present invention;

[0020] Figure 3 : A partial structural diagram of a spent fuel assembly transfer and ejection device provided in an embodiment of the present invention;

[0021] Figure 4: A partial structural diagram of another spent fuel assembly transfer and ejection device provided in an embodiment of the present invention;

[0022] Figure 5 : A longitudinal cross-sectional view of a spent fuel assembly transfer and ejection device provided in an embodiment of the present invention;

[0023] Figure 6 : A structural diagram of a guide rail provided in an embodiment of the present invention;

[0024] Figure 7 : A structural diagram of a through groove and an anti-tilt block provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Embodiment 1:

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a spent fuel assembly transfer and ejection device, which is applied in the post-processing process of the spent fuel assembly 4 to transfer the spent fuel assembly 4 and eject the fuel rods in the spent fuel assembly 4.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, the transport and ejection device of the spent fuel assembly includes a mounting seat 2, a moving trolley 3 and an ejection assembly. The moving trolley 3 is slidably arranged on the mounting seat 2; the moving trolley 3 is provided with a first slot, and the first slot is used to place the spent fuel assembly 4. The ejection assembly is arranged on the moving trolley 3, and is used to fix the spent fuel assembly 4 after the end is removed, and to eject the fuel rods in the spent fuel assembly 4.

[0029] Exemplarily, the mounting base 2 may be a box structure or a frame structure, which is used to support the moving cart 3 so that the moving cart 3 can remain stable while moving.

[0030] Exemplarily, the first end of the mounting seat 2 is close to the upper device (e.g., a device for pre-processing the spent fuel assembly 4). After the spent fuel assembly 4 in the upper device is processed, the mobile cart 3 is moved to the first end of the mounting seat 2 (close to the upper device) so that the spent fuel assembly 4 in the upper device can be placed in the first card slot of the mobile cart 3. Afterwards, the mobile cart 3 can transport the spent fuel assembly 4 to a shearing device (e.g., an arc saw cutting assembly), which can remove the end of the spent fuel assembly 4 to expose the fuel rods in the spent fuel assembly 4, so as to facilitate the ejection assembly to eject the fuel rods.

[0031] Exemplarily, the second end of the mounting seat 2 is close to the lower device (for example, a device for processing fuel rods). After the spent fuel assembly 4 is removed from the end and placed in the ejection assembly, the moving trolley 3 drives the ejection assembly and the spent fuel assembly 4 to move to the second end of the mounting seat 2 (close to the position of the lower device). After the ejection device ejects the fuel rod in the spent fuel assembly 4, the fuel rod falls directly into the lower device, so that the transportation of the spent fuel assembly and the ejection device and the lower device can be seamlessly connected, reducing the transportation of the spent fuel assembly and the transportation steps between the ejection device and the lower device. At this time, the outer sleeve of the spent fuel assembly 4 can be clamped into the waste barrel by an external power hand special tooling to wait for processing; after that, the moving trolley 3 moves to the first end of the mounting seat 2 (close to the position of the upper device) to wait for the transportation of the next spent fuel assembly 4.

[0032] Through the above arrangement, the fuel rods can be pushed out from the spent fuel assembly 4, thereby preventing the outer sleeve of the spent fuel assembly 4 from affecting the shearing of the fuel rods.

[0033] Therefore, the transport and ejection device of the spent fuel assembly provided by the embodiment of the present invention can place the spent fuel assembly 4 in the first slot by slidingly setting the moving trolley 3 on the mounting seat 2 and setting the first slot on the moving trolley 3, so that the moving trolley 3 drives the spent fuel assembly 4 to move, so as to facilitate the removal of the end of the spent fuel assembly 4 after the spent fuel assembly 4 is transported to the preset position. By setting the ejection assembly on the moving trolley 3, the spent fuel assembly 4 after the end is removed can be fixed by the ejection assembly, and the fuel rods in the spent fuel assembly 4 can be ejected, so as to avoid the outer sleeve of the spent fuel assembly 4 affecting the shearing of the fuel rods and reduce the difficulty of shearing the fuel rods. And the transport and ejection device of the spent fuel assembly can realize the transport of the spent fuel assembly 4 and the ejection function of the fuel rods in the same device at the same time, which is conducive to improving the efficiency of processing the spent fuel assembly 4.

[0034] In some embodiments, in combination Figure 2 and Figure 3The ejection assembly includes an ejection frame 15, a first driving member and an ejector rod 5. The ejection frame 15 is fixed on the moving trolley 3, and is used to fix the spent fuel assembly 4 after the end head is removed. The first driving member is arranged on the side of the moving trolley 3 opposite to the ejection frame 15. The first driving member is connected to the ejector rod 5, and is used to drive the ejector rod 5 to move. The ejector rod 5 is arranged between the first driving member and the ejection frame 15, and is used to extend into the outer sleeve of the spent fuel assembly 4 after the end head is removed under the drive of the first driving member to eject the fuel rods in the spent fuel assembly 4.

[0035] Exemplarily, the first driving member may be a linear motor, which may be fixed on the moving trolley 3 or the mounting seat 2 , and the free end of the linear motor is connected to the ejector rod 5 to drive the ejector rod 5 to move.

[0036] Exemplarily, the push rod 5 is slidably disposed on the moving trolley 3, and the outer diameter of the push rod 5 is slightly smaller than the inner diameter of the outer sleeve of the spent fuel assembly 4, so that the push rod 5 can extend into the outer sleeve of the spent fuel assembly 4 and eject all the fuel rods in the outer sleeve of the spent fuel assembly 4.

[0037] Exemplarily, the spent fuel assembly 4 after the end is removed is horizontally fixed on the ejection frame 15, the axis of the ejector rod 5 is in the same straight line as the axis of the spent fuel assembly 4, and the first driving member can drive the ejector rod 5 to reciprocate along its axis.

[0038] In some examples, such as Figure 4 As shown, the first driving member includes a push rod 6, a multi-section telescopic cylinder 7 and a commutator 8.

[0039] The push rod 6 is connected to the ejector rod 5 and is used to drive the ejector rod 5 to move.

[0040] Exemplarily, a lever is provided on the push rod 6, and a push rod end groove 12 is provided on the end of the push rod 5 close to the push rod 6. When the push rod 6 is needed to drive the push rod 5 to move, the lever is inserted into the push rod end groove 12 of the push rod 5, so that when the push rod 6 moves, the push rod 5 is driven to move synchronously through the lever.

[0041] The multi-section telescopic cylinder 7 can be fixed on the moving trolley 3 or the mounting seat 2.

[0042] When the multi-section telescopic cylinder 7 is fixed on the mounting base 2, the moving trolley 3 can drive the push rod 5 to move relative to the multi-section telescopic cylinder 7. Figure 1 When the fuel rod is at the rightmost position in the middle, the lever on the push rod 6 is inserted into the push rod end groove 12 of the push rod 5, so that the multi-section telescopic cylinder 7 drives the push rod 5 through the push rod 6 to extend into the outer sleeve of the spent fuel assembly 4 after the end is removed, so as to eject the fuel rods in the spent fuel assembly 4.

[0043] The multi-section telescopic cylinder 7 can be an electric telescopic cylinder, and the commutator 8 can transmit external power to the multi-section telescopic cylinder 7 to drive the multi-section telescopic cylinder 7 to retract or extend, and drive the push rod 6 to reciprocate.

[0044] Alternatively, the multi-section telescopic cylinder 7 can be a hydraulically or pneumatically driven telescopic cylinder, and the reversing device 8 can control the flow direction of the hydraulic oil or gas flowing to the multi-section telescopic cylinder 7 to control the retraction or extension of the multi-section telescopic cylinder 7 and drive the push rod 6 to reciprocate.

[0045] Through the above arrangement, the push rod 5 can be driven by the first driving member to extend into the outer sleeve of the spent fuel assembly 4 after the end is removed, and the fuel rods in the spent fuel assembly 4 can be pushed out.

[0046] In some embodiments, Figure 3 As shown, the ejection frame 15 includes a clamping plate 13 and a first top plate 16. The clamping plate 13 is located in the middle of the ejection frame 15, and a second clamping groove is formed on the upper part of the clamping plate 13. The second clamping groove is used to place the spent fuel assembly 4 after the end head is removed; the first top plate 16 is located at the end of the ejection frame 15 away from the ejector rod 5, and a third clamping groove is provided on the side of the first top plate 16 facing the ejector rod 5, and a through hole for the fuel rod to pass through is provided at the bottom of the third clamping groove. After the spent fuel assembly 4 after the end head is removed is placed in the second clamping groove, the outer sleeve of the spent fuel assembly 4 enters the third clamping groove and abuts against the first top plate 16.

[0047] The second clamping groove on the clamping plate 13 can play a positioning role for the spent fuel assembly 4 after the end is removed, so that the spent fuel assembly 4 can be stably placed on the clamping plate 13 and the ejector rod 5 can accurately extend into the interior of the spent fuel assembly 4 .

[0048] After the outer sleeve of the spent fuel assembly 4 enters the third clamping groove and abuts against the first top plate 16, the outer sleeve of the spent fuel assembly 4 can be limited in the axial direction of the spent fuel assembly 4. After the ejector rod 5 extends into the inner portion of the outer sleeve of the spent fuel assembly 4, the outer sleeve of the spent fuel assembly 4 cannot move because it is limited, so the fuel rod can be ejected from the outer sleeve of the spent fuel assembly 4.

[0049] Through the above arrangement, the spent fuel assembly 4 can be fixed, and the outer sleeve of the spent fuel assembly 4 can be limited, so that the ejector rod 5 can eject the fuel rod from the outer sleeve of the spent fuel assembly 4.

[0050] In some embodiments, Figure 3 As shown, a clamp 14 is provided on the ejection frame 15, and the clamp 14 is used to fix the spent fuel assembly 4 after the end is removed.

[0051] Exemplarily, the caliper 14 may be an electric caliper or a pneumatic caliper, so as to control the opening and locking of the caliper 14 .

[0052] When the spent fuel assembly 4 needs to be placed on the ejection rack 15 , the control clamp 14 is opened; after the spent fuel assembly 4 is placed on the ejection rack 15 , the control clamp 14 is locked to limit and fix the spent fuel assembly 4 in the radial direction of the spent fuel assembly 4 .

[0053] Through the above arrangement, the spent fuel assembly 4 can be further limited and fixed by the caliper 14 to keep the position of the spent fuel assembly 4 stable, so that the ejector rod 5 can accurately extend into the outer sleeve of the spent fuel assembly 4 to eject the fuel rod from the outer sleeve of the spent fuel assembly 4.

[0054] In some embodiments, in combination Figure 3 and Figure 5 Two guide rails 17 are arranged in parallel on the upper part of the mounting seat 2. A plurality of wheel assemblies 10 are arranged at the bottom of the mobile trolley 3, and at least one wheel assembly 10 is arranged on each guide rail 17. Each wheel assembly 10 includes a first wheel 18 and a second wheel 19; the first wheel 18 is rollingly arranged on the upper surface of the corresponding guide rail 17, and the second wheel 19 is rollingly arranged on the outer surface of the corresponding guide rail 17.

[0055] Exemplarily, the guide rail 17 is formed by welding a plurality of rectangular tubes in sequence.

[0056] Exemplarily, a plurality of wheel assemblies 10 are symmetrically arranged on both sides of the bottom of the moving cart 3 to provide better support for the moving cart 3 and improve the stability of the moving cart 3 .

[0057] The first wheel 18 mainly supports the moving vehicle 3 .

[0058] like Figure 5 As shown, a plurality of second wheels 19 are respectively arranged on both sides of the guide rail 17 , which can laterally position and guide the moving trolley 3 in the horizontal direction, thereby ensuring that the moving trolley 3 moves along the guide rail 17 and preventing the moving trolley 3 from sliding off the guide rail 17 .

[0059] Through the above arrangement, the stability of the moving vehicle 3 when moving on the guide rail 17 can be maintained.

[0060] In some embodiments, Figure 5 As shown, the mounting base 2 includes two vertically arranged support columns, two guide rails 17 are respectively fixed at the top ends of the two support columns, and the inner edges of the guide rails 17 exceed the inner edges of the support columns. A plurality of anti-tilt blocks 20 are arranged at the bottom of the moving trolley 3, and at least two anti-tilt blocks 20 are relatively arranged between the two guide rails 17. The portion of each anti-tilt block 20 located under the guide rail 17 is bent outward to form a bent portion, and each bent portion extends to the bottom of the corresponding guide rail 17.

[0061] Exemplarily, the anti-tilt block 20 is welded to the bottom of the moving trolley 3. The number of the anti-tilt blocks 20 can be two, four, five or six, etc.

[0062] With the above settings, Figure 5 As shown, when the moving trolley 3 tilts slightly, the bent portion of the anti-tilt block 20 on one side will abut against the bottom of the inner edge of the guide rail 17, limiting the anti-tilt block 20 from continuing to move, thereby preventing the moving trolley 3 from tilting significantly and falling from the guide rail 17.

[0063] In some embodiments, in combination Figure 6 and Figure 7 The guide rail 17 is provided with a plurality of through slots 21, through which the bent portion of the anti-tilt block 20 can pass. When the moving trolley 3 moves to the first position on the guide rail 17, in the vertical direction, the plurality of through slots 21 overlap with the bent portions of the plurality of anti-tilt blocks 20.

[0064] It can be understood that the number of the through slots 21 must be at least the same as the number of the anti-tilt blocks 20 to ensure that the bent portions of all the anti-tilt blocks 20 can pass through the through slots 21 at the same time.

[0065] When the mobile trolley 3 needs to be maintained as a whole, the mobile trolley 3 is moved to the first position on the guide rail 17. At this time, the position of the through groove 21 coincides with the position of the bent portion of the anti-roll block 20, and the bent portion of each anti-roll block 20 can pass through the through groove 21 to remove the mobile trolley 3 from the guide rail 17.

[0066] Through the above arrangement, the moving trolley 3 can be removed from the guide rail 17, so as to facilitate the overall lifting and maintenance of the moving trolley 3.

[0067] In some embodiments, Figure 3 As shown, a limit baffle 11 is provided at the end of the guide rail 17 , and the limit baffle 11 is used to limit the first wheel 18 located at the end of the moving vehicle 3 .

[0068] The limiting baffle 11 can prevent the first wheel 18 from sliding out from the end of the guide rail 17 , thereby preventing the moving vehicle 3 from falling off the guide rail 17 .

[0069] In some embodiments, Figure 2 As shown, the spent fuel assembly transfer and ejection device further includes a second driving member 9. The second driving member 9 is disposed on the mounting seat 2 and is used to drive the moving trolley 3 to move.

[0070] For example, Figure 2 As shown, the second driving member 9 can be a rigid open chain assembly driven by a motor to drive the moving trolley 3 to move back and forth along the chain bracket 1.

[0071] Through the above arrangement, the moving trolley 3 can be driven to move by the second driving member 9, so that the position of the moving trolley 3 can be controlled conveniently.

[0072] Embodiment 2:

[0073] The embodiment of the present invention also provides a post-processing system for processing spent fuel assemblies 4, and the post-processing system includes the spent fuel assembly transfer and ejection device, the power hand special tooling and the cutting device in embodiment 1. The power hand special tooling is used to grab the spent fuel assembly 4 transferred by the spent fuel assembly transfer and ejection device, transfer it to the cutting device, and transfer the spent fuel assembly 4 after the end head is removed from the cutting device to the ejection assembly. The cutting device is used to remove the end head of the spent fuel assembly 4.

[0074] Exemplarily, the cutting device may be an arc saw cutting assembly.

[0075] The working process of the post-processing system is as follows:

[0076] The mobile trolley 3 in the spent fuel assembly transfer and ejection device first moves the spent fuel assembly 4 to the vicinity of the cutting device so that the power hand special tooling can grab and transfer it to the cutting device. The cutting device removes the end of the spent fuel assembly 4, and then the power hand special tooling transfers the spent fuel assembly 4 after the end is removed to the ejection assembly, and the ejection assembly ejects the fuel rods in the spent fuel assembly 4.

[0077] Through the above arrangement, the operations of transporting the spent fuel assembly 4 , cutting off the end and ejecting the fuel rod can be realized, which helps to improve the processing efficiency of the spent fuel assembly 4 .

[0078] Embodiment 3:

[0079] The embodiment of the present invention also provides a method for processing a spent fuel assembly, which uses the spent fuel assembly transfer and ejection device in embodiment 1. The method comprises: placing a spent fuel assembly 4 in a first slot of a moving trolley 3; the moving trolley 3 drives the spent fuel assembly 4 to move to a second position; removing the end of the spent fuel assembly 4 by a cutting device; fixing the spent fuel assembly 4 after the end is removed in an ejection assembly, and ejecting the fuel rods in the spent fuel assembly 4 by the ejection assembly.

[0080] After the end of the spent fuel assembly 4 is removed, the fuel rods inside the spent fuel assembly 4 can be exposed, so that the fuel rods in the spent fuel assembly 4 can be ejected later by the ejection assembly.

[0081] Therefore, the spent fuel assembly transfer and ejection device in Example 1 can be used to eject the fuel rods in the spent fuel assembly 4 to directly shear the fuel rods, thereby preventing the outer sleeve of the spent fuel assembly 4 from affecting the shearing of the fuel rods.

[0082] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A spent fuel assembly transfer and ejection device, characterized in that: include: Mounting seat (2); A moving trolley (3) is slidably arranged on the mounting seat (2); a first slot is arranged on the moving trolley (3), and the first slot is used to place a spent fuel assembly (4); and, An ejection assembly is arranged on the mobile trolley (3) and is used to fix the spent fuel assembly (4) after the end is removed, and to eject the fuel rods in the spent fuel assembly (4).

2. The spent fuel assembly transfer and ejection device according to claim 1, characterized in that: The ejection assembly comprises: An ejector frame (15) is fixed on the mobile trolley (3) and is used to fix the spent fuel assembly (4) after the end is removed; a first driving member, arranged on a side of the moving trolley (3) opposite to the ejection frame (15); the first driving member is connected to the ejector rod (5) and is used to drive the ejector rod (5) to move; and, A push rod (5) is arranged between the first driving member and the ejection frame (15) and is used to extend into the outer sleeve of the spent fuel assembly (4) after the end is removed under the drive of the first driving member to eject the fuel rods in the spent fuel assembly (4).

3. The spent fuel assembly transfer and ejection device according to claim 2, characterized in that: The ejection frame (15) comprises a clamping plate (13) and a first top plate (16); the clamping plate (13) is located in the middle of the ejection frame (15), and a second clamping groove is formed on the upper part of the clamping plate (13), and the second clamping groove is used to place the spent fuel assembly (4) after the end is removed; the first top plate (16) is located at an end of the ejection frame (15) away from the ejector rod (5), and a third clamping groove is provided on a side of the first top plate (16) facing the ejector rod (5), and a through hole for the fuel rod to pass through is provided at the bottom of the third clamping groove; After the spent fuel assembly (4) with the end removed is placed in the second clamping groove, the outer sleeve of the spent fuel assembly (4) enters the third clamping groove and abuts against the first top plate (16).

4. The spent fuel assembly transfer and ejection device according to claim 3, characterized in that: The ejection frame (15) is provided with a clamp (14), and the clamp (14) is used to fix the spent fuel assembly (4) after the end is removed.

5. The spent fuel assembly transfer and ejection device according to claim 1, characterized in that: Two guide rails (17) are arranged in parallel on the upper part of the mounting seat (2); A plurality of wheel assemblies (10) are arranged at the bottom of the mobile trolley (3), and at least one wheel assembly (10) is correspondingly arranged on each guide rail (17); Each wheel assembly (10) comprises a first wheel (18) and a second wheel (19); the first wheel (18) is rollingly arranged on the upper surface of the corresponding guide rail (17), and the second wheel (19) is rollingly arranged on the outer side surface of the corresponding guide rail (17).

6. The spent fuel assembly transfer and ejection device according to claim 5, characterized in that: The mounting base (2) comprises two vertically arranged support columns, the two guide rails (17) are respectively fixed on the top ends of the two support columns, and the inner edges of the guide rails (17) extend beyond the inner edges of the support columns; A plurality of anti-tilt blocks (20) are arranged at the bottom of the movable vehicle (3), and at least two of the anti-tilt blocks (20) are arranged relatively between the two guide rails (17); a portion of each anti-tilt block (20) located below the guide rail (17) is bent outward to form a bent portion, and each of the bent portions extends to the bottom of the corresponding guide rail (17).

7. The spent fuel assembly transfer and ejection device according to claim 6, characterized in that: The guide rail (17) is provided with a plurality of passing grooves, wherein the passing grooves enable the bent portion of the anti-tilt block (20) to pass through; When the moving trolley (3) moves to the first position on the guide rail (17), in the vertical direction, the positions of the plurality of passing grooves and the bent portions of the plurality of anti-tilt blocks (20) coincide with each other.

8. The spent fuel assembly transfer and ejection device according to claim 5, characterized in that: A limit baffle (11) is provided at the end of the guide rail (17), and the limit baffle (11) is used to limit the first wheel (18) located at the end of the moving vehicle (3).

9. The spent fuel assembly transfer and ejection device according to claim 1, characterized in that: Also includes a second driving member (9); The second driving member (9) is arranged on the mounting seat (2) and is used to drive the moving vehicle (3) to move.

10. A post-processing system, characterized in that: include: The spent fuel assembly transfer and ejection device according to any one of claims 1 to 9; A tooling for a power hand is used to grab the spent fuel assembly (4) transferred by the spent fuel assembly transfer and ejection device, transfer it to the cutting device, and transfer the spent fuel assembly (4) on the cutting device after removing the end head to the ejection assembly; A cutting device is used to remove the end of the spent fuel assembly (4).

11. A method for processing a spent fuel assembly, characterized in that: A device for transporting and ejecting a spent fuel assembly using any one of claims 1 to 9; The method comprises: Placing the spent fuel assembly (4) in the first slot of the mobile trolley (3); The moving trolley (3) drives the spent fuel assembly (4) to move to a second position; removing the end of the spent fuel assembly (4) by means of a cutting device; The spent fuel assembly (4) with the end removed is fixed in an ejection assembly, and the fuel rods in the spent fuel assembly (4) are ejected by the ejection assembly.

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