Pressure pipe and drain pipe removal tool and method of use thereof

Abstract

This invention provides a system and method for reducing the volume of pipes and pressure tubes in a pipe container of a nuclear reactor. The system includes a pressure tube and a pipe handling tool comprising: a pressure tube rod for engaging and pushing the distal end of a pressure tube; a pipe rod for engaging and pushing the distal end of a pipe; and an actuator for moving the pressure tube rod toward or away from the pressure tube and for moving the pipe rod toward or away from the pipe. The system also includes a volume reduction system comprising: a press for compressing the pipe and pressure tube; a pipe removal head; and a feeder for pulling the pipe into the press. A controller coordinates the movement of the pressure tube rod, the pipe rod, the pipe removal head, and the feeder.

Description

[0001] Cross-reference to related applications and application for preference This application claims priority to U.S. Provisional Patent Application No. 63 / 591,884, filed October 20, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates generally to waste management, and more specifically to volume reduction systems for handling nuclear reactor components. Background Technology

[0003] Nuclear reactors have a limited operational lifespan. For example, second-generation CANDU... TM The type of reactor (“Canadian heavy water uranium”) is designed to operate for approximately 25 to 30 years. After this period, if the reactor is nearing decommissioning, the existing fuel channels can be removed, or if the reactor requires maintenance, new fuel channels can be installed. Performing this “re-pipe” process as an alternative to reactor decommissioning can significantly extend the reactor’s lifespan. Nuclear reactor decommissioning and / or re-pipe processes involve the removal of numerous reactor components and include various other activities such as shutting down the reactor, preparing the reactor cavity, and installing material handling equipment and various platforms and equipment supports. The removal process may also include removing the closure plug and locating hardware components, disconnecting feeder assemblies, cutting bellows, and removing end fittings.

[0004] The removal process may also include the removal and disposal of highly radioactive pressure tubes and manifolds from the reactor core. The removal and / or disposal of these tubes, along with other reactor components, can be time-consuming and labor-intensive. Furthermore, the pressure tubes and manifolds in the reactor core may be radioactively contaminated and require transport to a closed and isolated facility for storage. Prior to transport, the pressure tubes and manifolds may be reduced in volume to decrease the volume of radioactive waste. However, reducing the volume of pressure tubes and manifolds may generate debris and dust that may detach from the waste containment containers used to transport the reduced-volume pressure tubes and manifolds. Summary of the Invention

[0005] In one aspect, this disclosure describes a system for reducing the volume of pipes and pressure tubes in a pipe container of a nuclear reactor. The system includes: a pressure tube and pipe handling tool comprising: a pressure tube rod for engaging and actuating a distal end of a pressure tube; a pipe rod for engaging and actuating the distal end of a pipe; and at least one actuator for moving at least one of the pressure tube rods toward or away from the pressure tube and for moving the pipe rod toward or away from the pipe. The system also includes a volume reduction system comprising: a press for compressing the pipes and pressure tubes; a pipe removal head for engaging an inner surface of the pipes; a feeder for engaging a proximal end of the pipes to pull the pipes into the press; and a controller for coordinating the movement of the pressure tube rod, the pipe rod, the pipe removal head, and the feeder.

[0006] In one embodiment, the pressure tube and pipe handling tool includes a locking pin for coupling the pressure tube rod and the pipe rod to enable simultaneous movement of the pressure tube rod and the pipe rod when actuated by at least one actuator.

[0007] In one embodiment, the pipe rod is configured to move parallel to the longitudinal axis of the pipe, and wherein the pipe rod is configured to move between the outer surface of the pressure pipe and the inner surface of the distal end of the pipe. The inner surface of the distal end of the pipe may be the flared end tapered surface of the pipe.

[0008] In one embodiment, the pipe removal head is configured to engage the inner surface of the proximal end of the pipe, and wherein the pipe removal head is configured to axially push the pressure tube toward a grid point on the opposite side of the nuclear reactor. The pipe removal head may include at least one gripper configured to move to an extended position for engaging the inner surface of the pipe.

[0009] In one embodiment, the controller is configured to send data to at least one actuator to move a pressure rod to engage the distal end of the pressure tube and push the distal end of the pressure tube toward the reduction system. The at least one actuator may be configured to move the pressure rod to push the pressure tube while the tube is stationary.

[0010] In one embodiment, the controller is configured to send data to at least one actuator to move the pipe rod to engage with the distal end of the pipe and push the distal end of the pipe toward the reduction system.

[0011] In one embodiment, the controller is configured to: send data to cause the locking pin to couple the pressure tube rod and the manifold rod to achieve simultaneous movement; and send data to at least one actuator to simultaneously push the distal end of the pressure tube and the distal end of the manifold towards the decapacity reduction system.

[0012] In one implementation, the controller is configured to: send data to the pipe pull rod to position the pipe removal head within the proximal end of the pipe and engage with the inner surface of the pipe; and send data to the pipe pull rod to pull the pipe toward the volume reduction system. The controller may also send data to the pipe pull rod to push the proximal end of the pressure tube toward the grid point before sending data to the pipe pull rod to pull the pipe toward the volume reduction system.

[0013] In one implementation, the controller is configured to send data to the feeder to engage with the proximal end of the pipe to pull the pipe into the reduction system.

[0014] In one implementation, the controller is configured to send data to the press to extrude at least one of the pressure tube and the pipe.

[0015] Implementation methods may include combinations of the above features.

[0016] In another aspect, this disclosure describes a method for reducing the volume of a tube bundle and a pressure tube, the method comprising: providing a system according to this disclosure for reducing the volume of a tube bundle and a pressure tube of a nuclear reactor tube bundle container. The method further comprises: inserting a tube bundle removal head into the proximal end of a tube bundle; pushing the tube bundle removal head into the proximal end of a pressure tube to push the pressure tube into a grid point; moving a tube bundle rod to contact the distal end of the tube bundle; pulling the proximal end of the tube bundle with the tube bundle removal head while pushing the distal end of the tube bundle with the tube bundle rod to release the proximal and distal ends of the tube bundle from the tube sheet of the tube bundle container; moving at least one of the tube bundle and the pressure tube into a compressor; and squeezing at least one of the tube bundle and the pressure tube with the compressor.

[0017] In one embodiment, the method includes: moving a pressure rod to contact the distal end of a pressure tube at a grid point; and pushing the distal end of the pressure tube with the pressure rod.

[0018] Implementation methods may include combinations of the above features.

[0019] In another aspect, this disclosure describes a system for removing the pipes and pressure pipes of a pipe-pack container from a nuclear reactor, the system comprising: a pressure pipe and pipe-pack handling tool, the pressure pipe and pipe-pack handling tool comprising: a pressure pipe rod for engaging and actuating the distal end of a pressure pipe; a pipe-pack rod for engaging and actuating the distal end of a pipe-pack; and at least one actuator for moving at least one of the pressure pipe rods toward or away from the pressure pipe and for moving the pipe-pack rod toward or away from the pipe-pack; and a controller for coordinating the movement of the pressure pipe rod and the pipe-pack rod.

[0020] In one embodiment, the pressure tube and pipe handling tool includes a locking pin for coupling the pressure tube rod and the pipe rod to enable simultaneous movement of the pressure tube rod and the pipe rod when actuated by at least one actuator.

[0021] In one embodiment, the pipe rod is configured to move parallel to the longitudinal axis of the pipe, and wherein the pipe rod is configured to move between the outer surface of the pressure pipe and the inner surface of the distal end of the pipe. The inner surface of the distal end of the pipe may be the flared end tapered surface of the pipe.

[0022] In one embodiment, the controller is configured to send data to at least one actuator to move a pressure rod to engage the distal end of a pressure tube and push the distal end of the pressure tube toward a grid point on the opposite side of the nuclear reactor. The at least one actuator is configured to move the pressure rod to push the pressure tube while the tube assembly is stationary.

[0023] In one embodiment, the controller is configured to send data to at least one actuator to move the tube rod to engage the distal end of the tube and push the distal end of the tube toward a grid point on the opposite side of the nuclear reactor.

[0024] In one embodiment, the controller is configured to: send data to cause the locking pin to couple the pressure tube rod and the manifold rod to achieve simultaneous movement; and send data to at least one actuator to simultaneously push the distal end of the pressure tube and the distal end of the manifold towards grid points on opposite sides of the nuclear reactor.

[0025] Implementation methods may include combinations of the above features.

[0026] Further details of these and other aspects of the subject matter of this application will become apparent from the detailed embodiments and accompanying drawings included below. Attached Figure Description

[0027] Now refer to the attached diagram, in which: Figure 1 It is CANDU TM A three-dimensional view of a type of reactor.

[0028] Figure 2 yes Figure 1 A cross-sectional view of the nuclear reactor fuel passage assembly.

[0029] Figure 3 The annular spacer is installed Figure 2 A three-dimensional view of the pressure pipe and the manifold of the fuel passage assembly.

[0030] Figure 4 This is a top view schematic diagram of a pressure pipe and pipe removal system at the end face, and a volume reduction system according to one embodiment, wherein the volume reduction system is used to reduce... Figure 3The volume of pressure pipes and / or pipework.

[0031] Figure 5A This is a side sectional view of an exemplary grid pipe, pipe array, and pressure pipe. Figure 5B An exemplary capacity reduction system was inserted. Figure 5A A side sectional view of the grid pipe, pipe row and pressure pipe.

[0032] Figure 6A and Figure 6B This is a side sectional view of an exemplary grid pipe, pipe array, and pressure pipe. Figure 6A This demonstrates that the pressure pipe is in the first position defined by the pipe arrangement. Figure 6B This shows the pressure tube being pushed into the grid point, in the second position.

[0033] Figure 7 The exemplary clamp on the pipe removal lever of the volume reduction system in Figure 5 extends to contact the pipe in a side cross-sectional view.

[0034] Figure 8A , Figure 8B and Figure 8C It is a side cross-sectional view of the pressure tube (PT) and tube stack (CT) handling tools and their connection with the pressure tube and tube stack. Figure 8A The PT / CT processing tools are shown before they are connected to the pressure tubes and tubing. Figure 8B The PT rod of the PT / CT processing tool is shown engaging with the PT. Figure 9 C illustrates the CT lever of the PT / CT processing tool engaging with the CT sensor.

[0035] Figure 9 These are side sectional views and enlarged views of the pressure tube (PT) and ductwork (CT) handling tools and their connections to the pressure tube and ductwork.

[0036] Figure 10 This is a side view of the locking pin.

[0037] Figure 11A and Figure 11B This is a side cross-sectional view of the pull rod of the capacity reduction system pulling the pipe towards the capacity reduction system. Figure 11A The image shows one side of the pipework, where the volume reduction system lever pulls the pipework. Figure 11B The opposite sides of the pipework are shown, where pressure pipes and pipework handling tools push the pipework to release it from the tube sheet.

[0038] Figure 12 The movement of the PT / CT processing tool is shown, with pressure tubes and tubing being pushed toward the volume reduction system.

[0039] Figure 13This is a side sectional view of a volume reduction system, which includes a feeder of a press that pulls the pressure tube (PT) and the feed tube (CT) into the volume reduction system, and a PT rod that pushes the pressure tube (PT) and the feed tube (CT) into the press.

[0040] Figure 14A and Figure 14B This is a side view of a pressure tube (PT) and cable tray (CT) handling tool with the locking pin engaged. Figure 14B This shows the process of transferring PT from Figure 14A The PT / CT processing tool is pushed to the position shown.

[0041] Figure 15 This is a side cross-sectional view of the pressure tube (PT) and cable tray (CT) handling tools, with the CT rod retracted and the PT rod advancing forward.

[0042] Figure 16 yes Figure 13 The volume reduction system includes a side sectional view of a shearing machine used for cutting pipes and pressure pipes.

[0043] Figure 17 This is an image of a press extruding a pipe in an exemplary volume reduction system.

[0044] Figure 18 This is a schematic diagram of an exemplary method for reducing the volume of the piping and pressure pipes of a nuclear reactor.

[0045] Figure 19 This is a schematic diagram of an exemplary system for controlling a system that reduces the volume of the piping and pressure lines of a nuclear reactor's piping container. Detailed Implementation

[0046] Currently, the removal of pressure tubes (PT) and tube stacks (CT) is performed in two separate stages. During PT removal, there is a high probability of debris spilling along the waste path due to displacement of the annular spacer (AS). The combination of PT and CT removal operations according to this disclosure reduces the likelihood of AS debris spillage because the AS debris is confined within the PT / CT during removal. The time required for both PT and CT removal operations is also reduced.

[0047] Before providing a detailed description of any implementation, it should be understood that this disclosure is not limited to its application in the construction details and component arrangements described below or shown in the accompanying drawings. This disclosure may be implemented or carried out in other ways.

[0048] limited Although terms such as “maximize,” “minimize,” and “optimize” may be used in this disclosure, it should be understood that such terms may be used to refer to improvement, adjustment, and refinement, and are not strictly limited to maximum, minimum, or optimal.

[0049] The term “connection” or “coupled to” can include direct coupling (where two elements are coupled to and in contact with each other) and indirect coupling (where at least one additional element is located between the two elements).

[0050] The term “substantially” as used in this application may be used to modify any quantitative description which may vary within permissible limits without altering its relevant essential function.

[0051] Terms such as “up to,” “at least,” “greater than,” “less than,” “more than,” or “or above” include the numbers mentioned, and such terms indicate a range that can be further subdivided into sub-ranges. In the same manner, all ratios described in this application also include all sub-ratios falling within the wider range of ratios.

[0052] Unless the context clearly specifies otherwise, the singular forms of “a,” “an,” and “the” include the plural meaning. The term “and / or” refers to any one, any combination of, or all of the items associated with this term.

[0053] The term "about" may refer to a range of variation of ±5%, ±10%, ±20%, or ±25% of the specified value. For example, "about 50%" may represent a range of variation of 45% to 55% in some embodiments. For integer ranges, the term "about" may include one or two integers greater than and / or less than the mentioned integer at each end of the range. Unless otherwise stated in this application, the term "about" is intended to include values ​​and ranges that are close to the mentioned range and are functionally equivalent in construction or implementation.

[0054] The various embodiments are described with reference to the accompanying drawings.

[0055] Figure 1 It is CANDU TM A perspective view of the reactor core of reactor type 6. The reactor core is typically housed within a cavity sealed by a gaslock for radiation control and shielding. Although for convenience, this invention specifically refers to CANDU. TM The invention is described in detail in section 6 regarding the CANDU reactor, but is not limited to CANDU. TM This type of reactor may also be useful outside of this specific field. Return to... Figure 1 A roughly cylindrical container (called CANDU) TMThe pipe container 10 of the reactor type 6 contains heavy water moderator. The pipe container 10 has an annular outer shell 14 and tube sheets 18 at a first end 22 and a second end 24. The tube sheet 18 includes a plurality of orifices (referred to herein as "orifices") 19, each orifice receiving a fuel passage assembly 28. Figure 1 As shown, several fuel passage assemblies 28 extend from the first end 22 through the tube sheet 18 of the pipe container 10 to the second end 24.

[0056] As shown in the figure, in some embodiments, the reactor core has two walls at each end 22, 24: an inner wall defined by a tube sheet 18 at each end 22, 24 of the reactor core, and an outer wall 64 (often referred to as an "end shield") located at a certain distance outside the tube sheet 18 at each end 22, 24 of the reactor core. Figure 2 (Middle). The grid tube 65 spans the distance between the tube sheet 18 and the end shield 64 at each pair of holes (i.e., holes in the tube sheet 18 and the end shield 64, respectively).

[0057] Figure 2 yes Figure 1 A cross-sectional view of a fuel channel assembly 28 of the reactor core is shown. Figure 2 As shown, each fuel passage assembly 28 includes a tube bundle (“CT”) 32 surrounding other components of the fuel passage assembly 28. Each CT 32 spans the distance between tube sheets 18. Furthermore, the opposite ends of each CT 32 are received and sealed within respective bores in the tube sheets 18. In some embodiments, CT roll-fit inserts 34 are used to secure the CT 32 to the tube sheet 18 within the bores. Pressure tubes (“PT”) 36 form the inner wall of the fuel passage assembly 28. PT 36 provides conduit for reactor coolant and fuel rod bundles or assemblies 40. For example, PT 36 typically accommodates two or more fuel assemblies 40 and serves as conduit for reactor coolant flow through each fuel assembly 40. An annular space 44 is defined by the gap between each PT 36 and its corresponding CT 32. The annular space 44 is typically filled with a circulating gas, such as dry carbon dioxide, helium, nitrogen, air, or a mixture thereof. One or more annular spacers 48 are arranged between the CT 32 and the PT 36. The annular spacer 48 maintains the gap between PT 36 and the corresponding CT 32, while allowing the annular gas to pass through and flow around the annular spacer 48.

[0058] Figure 3An embodiment is shown in which an annular spacer 48 is installed within an annular space 44 between CT 32 and PT 36. The annular spacer 48 includes a ring spring 52 and a hoop wire 56. An exemplary ring spring 52 is formed from a segment of wound wire 61. The two ends 74 and 78 of the wound wire 61 are connected, such that the ring spring 52 forms a helical coil 72. The ring spring 52 can be sized to fit tightly around PT 36 and have a resilient force, allowing it to expand to a size greater than the outer diameter 76 of PT 36 during installation, and to remain tightly and securely fitted after placement. In the illustrated embodiment, the ring spring 52 is made of a nickel-chromium-based alloy, such as INCONEL X-750. In other embodiments, the ring spring 52 may be made of other alloys, including zirconium-based alloys (e.g., ZIRCALOY) or zirconium-niobium-copper alloys. In further embodiments, the ring spring 52 may be made of an alloy including, but not limited to, combinations of zirconium, niobium, and copper.

[0059] Just like Figure 2 As shown, each end of each fuel passage assembly 28 is provided with an end fitting assembly 50 located outside the corresponding tube sheet 18. Each end fitting assembly 50 includes an end fitting body 57 and an end fitting liner 59. At the end of each end fitting assembly 50 is a sealing plug 53. Each end fitting assembly 50 also includes a feeder assembly 54. The feeder assembly 54 supplies reactor coolant to or removes reactor coolant from the PT 36 via a feeder pipe 67. Figure 1 Specifically, for a single fuel channel assembly 28, the feeder assembly 54 at one end of the fuel channel assembly 28 serves as an inlet feeder, while the feeder assembly 54 at the opposite end of the fuel channel assembly 28 serves as an outlet feeder. Figure 2 As shown, the feeder assembly 54 can be attached to the end fitting assembly 50 using a coupling assembly 51, which includes a plurality of screws, gaskets, seals, and / or other types of connectors. A grid tube 65 (as described above) covers the connection between the end fitting assembly 50 and the PT 36 housing the fuel assembly 40. Shielded ball bearings 66 and cooling water surround the exterior of the grid tube 65, providing additional radiation shielding.

[0060] Back Figure 2The positioning hardware assembly 60 and bellows 62 are also coupled to each end fitting assembly 50. Bellows 62 enables axial movement of the fuel passage assembly 28—a capability important in situations where the fuel passage assembly 28 undergoes length changes over time (common in many reactors). The positioning hardware assembly 60 can be used to set the end of the fuel passage assembly 28 to a locked or unlocked configuration with a fixed axial position. The positioning hardware assembly 60 is also coupled to the end shield 64. Each illustrated positioning hardware assembly 60 includes a rod with an end received in a bore in its respective end shield 64. In some embodiments, the rod end and the bore in the end shield 64 are threaded. Similarly, it should be understood that, although in Figures 1-2 CANDU was shown in TM This invention pertains to type 1 reactors, but it can also be applied to other types of reactors, including those with [specific characteristics]. Figures 1-2 The reactor has components similar to those shown.

[0061] As mentioned above, large-scale fuel passage replacement is typically required to extend the operational life of a nuclear reactor. Therefore, some or all of the fuel passage assemblies 28 must be removed and replaced. One of the key processes in this replacement is the removal and disposal of CT 32 and / or PT 36 from the reactor core. CT 32 and PT 36 are highly radioactive. Therefore, the removal and disposal process requires safety precautions and safeguards (e.g., measures typically mandated by regulations) to ensure the safe disposal of CT 32 and PT 36. However, ideally, it is advantageous to perform the removal and disposal as quickly and efficiently as possible while still meeting all safety regulatory requirements. This is because the costs involved in shutting down the reactor to complete a large-scale fuel passage replacement are high. Furthermore, waste storage costs depend on the volume of waste stored. Therefore, minimizing the storage volume helps reduce storage costs. Many of the same considerations also apply to reactor decommissioning (this invention also applies to reactor decommissioning).

[0062] One way to improve the efficiency and time of fuel channel assembly replacement and reduce waste storage costs is to reduce the volume of CT 32 and / or PT 36 using a volume reduction process before moving CT 32 and / or PT 36 to the disposal site. Three different volume reduction systems and methods are described below.

[0063] PT / CT and volume reduction at the end face Figure 4A schematic diagram of an exemplary pressure tube / tube removal system 100 and a volume reduction system (VRS) 200 is shown. In one embodiment, there may be only one VRS on the pull side and only one PT / CT removal system 100 including a rod on the push side. The A side of the tube container 10 may be coupled to the tube removal system 100 to push the combined PT / CT towards the VRS 200. The C side of the tube container 10 may be coupled to the VRS 200 to receive and compress the combined PT / CT pushed by the PT / CT removal system 100.

[0064] Conventionally, PTs and CTs can be removed from the reactor and transferred to a container for volume reduction in different buildings, away from the reactor and the platform supporting the PT / CT removal tools. However, the tools and methods according to this disclosure can be performed on a platform immediately adjacent to the nuclear reactor pipe container. A similar volume reduction system is described in International Patent Application No. PCT / CA2018 / 050671 (published as WO2018232497A1), the entire contents of which are incorporated herein by reference.

[0065] The following text refers to Figures 4-18 An exemplary method for removing a combined PT / CT from the manifold container 10 is described.

[0066] In some embodiments, the end fitting assembly 50 may initially be removed to provide direct access to CT 32 and PT 36. In some embodiments, the end fitting assembly 50 may be removed, and PT 36 may be cut, for example, within the grid tube 65 or the pipe array 32. Figure 5A As shown, PT 36 can be cut along line A1 adjacent to tube sheet 18, or along line A2 inside tube 32 on the inside side of tube sheet 18. The portion of PT 36 extending outside end shield 64 can also be cut. In one embodiment, the pressure tube of the Candu-6™ reactor can extend 16 inches from end shield 64, which can be cut and removed together with end fitting assembly 50.

[0067] like Figure 4As shown, in one embodiment, the volume reduction system 200 can be moved from the C side of the manifold container 10 to the target fuel passage via a heavy-duty workbench (HWT) and platform (not shown). In this application, the C side can also be referred to as the "pull side" (or proximal side) of the manifold container 10, and the A side can be referred to as the "push side" (or distal side) of the manifold container 10. Similarly, the PT / CT removal system 100 can be moved from the A side of the manifold container 10 to the opposite end of the target fuel passage. The VRS 200 and the PT / CT processing tool 102 of the removal system 100 (also referred to as a guide tool in this application) are aligned with the target fuel passage, and the grid tube can be visually inspected using cameras on the VRS 200 and PT / CT removal tool 100 on the A and C sides of the manifold container 10. Grid sleeve processing tools 101, 201 can be moved toward the target fuel passage to remove the shielding plug (also referred to as... in this application) Figure 5A The "tack plug" 63 shown is used to open the end of the target fuel passage. The tack plug can be positioned to temporarily seal the ends of CT 32 and PT 36 before CT and PT are removed. Subsequently, VRS 200 and removal system 100 101 can be inserted into the target grid points on the C side and A side, respectively, to connect with the target fuel passage.

[0068] Figure 5A A side sectional view of an exemplary grid tube, pipe array, and pressure tube is shown. As described above, the end fitting assembly 50 can be removed, and the tack plug 63 can be installed. In one embodiment, PT 36 can be cut along line A1 adjacent to the tube sheet 18, leaving no PT residual segment. In another embodiment, PT 36 can be cut within CT 32 at line A2. Similar exemplary cuts can also be made at opposite ends of PT 36. The combined PT / CT removal tool 100 can perform removal and processing at both exemplary PT cut locations.

[0069] Figure 5B An exemplary capacity reduction system was inserted. Figure 5A A side sectional view of the grid pipe, pipe row, and pressure pipe. (See example...) Figure 5B As shown, the VRS 200 may include a CT removal head 202, which is inserted into the target grid point on the C side and inserted into the minor diameter of the CT 32 at the proximal end 35 of the CT 32 via a CT removal tool lever 203. This movement can push / push the PT 36 toward / into the PT / CT processing tool 102 on the A-side. When the VRS CT removal lever 203 inserts the head 202 into the CT 32, the PT 36 is pushed into the grid point on the A side. Figure 6A The position of PT 36 before pushing is shown. Figure 6B The position of PT 36 after being pushed is shown. (See diagram.) Figure 6BAs shown, PT 36 can be pushed a distance ZZ. In one embodiment, the distance ZZ can be 2cm-100cm.

[0070] like Figure 7 As shown, on side C, the head 202 may include a plurality of VRS CT rod holders 202-1, 202-1 movable to an extended position, in which the plurality of VRS CT rod holders 202-1 engage with the inner diameter of the CT 32. The CT removal head 202 can be pressed... Figure 7 The distance XX shown pushes / pulls PT 36 toward / into the PT / CT processing tool 102 on the A-side face.

[0071] like Figure 8A As shown, on side A, the PT / CT processing tool 102 may include a PT lever 103 and a CT lever 104. The CT lever 104 may be radially outwardly separated from the PT lever 103 and is configured to translate axially along the outer surface of the PT 36. The PT lever 103 may be positioned slightly in front of (inside) the CT lever 104 to center the PT 36 within the CT 32, thereby preventing it from stalling in front of the CT lever 104 when entering the grid point. Figure 8B As shown, the PT / CT processing tool 102 can be moved into the grid point until the PT lever 103 stops at the distal end 37 of the PT 36 at a predetermined torque value. The CT lever 104 can be advanced forward along the length axis of the PT 36, as... Figure 8C As shown, the CT 32 stops at its distal end 38 on the flared end cone 33 of the CT 32. In one embodiment, the CT rod 104 can move independently of the PT rod 103 and move axially forward / inward to engage the CT 32 before the PT rod 103 engages with the PT 36.

[0072] like Figure 9 As shown, PT rod 103 can be moved away from PT 36 and / or completely retracted out of the grid point. Figure 9 A partially enlarged view of section A shows that the CT lever 104 may include a CT holder 105 configured to engage and couple with the inner diameter of the CT 32 at its proximal end 35 by pressure / friction. The CT holder 105 can be radially moved to engage with the inner diameter of the CT 32. Thus, the CT lever 104 can push the distal end 38 of the CT 32, while the VRS CT pull rod 203 pulls the proximal end 35 of the CT 32 into the VRS press 204.

[0073] like Figure 10As shown, the PT / CT processing tool 102 may include a locking pin 106 configured to engage with PT lever 103 / CT lever 104 for the initial push / pull operation of CT 32 and PT 36. The locking pin 106 can engage with each of PT lever 103 and CT lever 104 to fix their relative positions, such that actuator 107 can simultaneously push PT lever 103 and CT lever 104 into CT 32 and PT 36, advancing them toward VRS 200.

[0074] like Figure 11A and Figure 11B As shown, on side C (pulling side), the VRS CT pull rod 203 pulls the CT 32, while on side A (pushing side), the PT / CT processing tool 102 pushes the CT 32 to release the opposite ends of the CT 32 from the tube sheet 18 at the first end 22 and the second end 24. The CT 32 can be moved by this pushing / pulling as follows: Figure 11A The distance YY is shown. In one embodiment, the distance YY can be in the range of 2cm-30cm. This can be the first push / pull action.

[0075] like Figure 12 As shown, the first push / pull action or subsequent push / pull actions can move a portion of CT 32 into the VRS press 204, positioning the proximal portion of CT 32 within the VRS press 204 for compression. The movement of CT 32 from side A to side C is... Figure 12 The arrow in the image indicates this.

[0076] like Figure 13 As shown, the VRS CT lever holders 202-1, 202-1 can be released from the CT 32, and the CT removal head 202 of the VRS 200 can be moved to the starting position, away from the CT 32 and not in contact with it. Subsequently, the first portion of the CT 32 within the VRS press 204 can be compressed. In one embodiment, the PT / CT processing tool 102 can then be advanced toward the C-side to push another portion of the CT 32 and the PT 36 defined within the CT 32 into the VRS press 204. In one embodiment, the actuator 107 of the PT / CT processing tool 102 includes a rack and pinion Z-shaped drive to push the PT / CT into the VRS press 204.

[0077] VRS 200 may also include a VRS feeder 205 configured to clamp the outer surface of CT 32 and pull CT 32 toward VRS press 204. VRS feeder 205 may pull CT 32 while PT / CT processing tool 102 pushes CT 32 toward VRS press 204 for compression. In one embodiment, VRS feeder 205 may engage with the outer diameter of CT 32. PT / CT processing tool 102 may extend PT bar 103 forward until PT bar 103 stops on PT 36 to release clamp 105 of CT bar head 104. Locking pin 106 located on the side of PT / CT processing tool 102 may engage PT bar 103 / CT bar 104 to allow PT / CT processing tool 102 to perform another push / pull. The movement of the VRS feeder 205 can be coordinated with a push from side A to simultaneously complete subsequent push / pull operations. Figure 14B In the illustrated embodiment, for the second push / pull, the PT / CT processing tool 102 compared to Figure 14A Advance 2cm-30cm to the indicated position to push the other part of CT 32 and PT 36 into VRS press 204.

[0078] like Figure 15 As shown, as PT 36 / CT 32 is pushed into the VRS press 204 on side C, on side A, CT lever head 104 can be moved back (e.g., moved about 2 inches) to disengage from CT 32. PT lever 103 can remain in place to prevent PT 36 / CT 32 from moving during the release and retraction of CT lever 104.

[0079] VRS 200 can continue to compress PT 36 / CT 32 until completely flattened. VRS feeder 205 can pull the remaining PT36 / CT 32 into VRS press 204. Once CT 32 has been pushed past VRS side plate 22, PT rod 103 of PT / CT processing tool 102 can assist in pushing PT 36 / CT 32 into VRS press 204. When PT / CT processing tool 102... Figure 16 When it reaches its maximum reach, it can retract, and the remaining PT 36 / CT 32 can be pulled and squeezed using the VRS feeder 205.

[0080] The reduction system 200 may include any number and type of feeders 205 to move CT 32 and / or PT 36 to VRS press 204. Feeders 208 may include retractable plugs, fingers and chains, or other implementations. This may include feeders with different structures (including but not limited to clamps, suction elements, conveyors, guides, etc.), or feeders having any other structure that clamps the inner and / or outer surfaces of CT 32 and / or PT 36 and moves CT 32 and / or PT 36 to VRS press 204.

[0081] Figure 16 An exemplary VRS shear 206 is shown. The shear 206 can be installed in the VRS 200 in case of VRS feeder 205 failure. The shear 206 can cut CT 32 and / or PT 36 at the location of the shear 206. When cutting CT 32 and / or PT 36 using the shear 206, a lead blanket (not shown) can be placed over the open passage created by the cutting of CT 32 and / or PT 36 for emergency operation. In one embodiment, the length of the PT rod 103 can be extended to engage CT 32 and PT 36, allowing the PT rod 103 to continue pushing CT 32 and PT 36 into the VRS press 204 even if the VRS feeder 205 fails.

[0082] The VRS press can employ any design suitable for extruding and / or dividing the CT 32 and / or PT 36. In one embodiment, the VRS press 204 includes a dividing unit as described in International Patent Application No. PCT / CA2018 / 050671 (published as WO2018 / 232497), the entire contents of which are incorporated herein by reference. In another embodiment, the VRS press 204 may include a die block comprising a plurality of checkerboard-shaped raised cutters and recessed grooves as described in U.S. Patent No. 6,523,466, the entire contents of which are incorporated herein by reference. Figure 17 An image of an exemplary VRS press is shown, illustrating a plurality of checkerboard-shaped raised cutters 209 and recessed grooves positioned to extrude pipes.

[0083] Figure 18 A schematic diagram is shown, illustrating method 1800 for reducing the capacity of pipes and pressure pipes.

[0084] In 1802, the method includes providing a system for reducing the volume of the pipes and pressure pipes of a pipe container for a nuclear reactor, according to the present disclosure.

[0085] In 1804, the method included inserting a pipe removal head into the proximal end of the pipe.

[0086] In 1806, the method involved pushing a pipe removal head into the proximal end of the pressure tube to push the pressure tube into the grid point. By pushing the pressure tube into the grid point, the pipe rod could more easily access and insert the distal end of the pipe. Similarly, the pressure tube rod could also more easily access the pressure tube.

[0087] In 1808, the method includes moving a pipe rod to contact the distal end of a pipe. In one embodiment, the pipe rod may contact the flared end of the pipe. A pressure pipe rod may also be inserted into a pressure pipe to center the pressure pipe within the pipe, thereby causing the pipe rod to reach the tapered surface of the flared end of the pipe (e.g., as shown in the image). Figure 9 (As shown) it will not stop before.

[0088] In 1810, the method involved pulling the proximal end of the tube with a tube removal head while simultaneously pushing the distal end of the tube with a tube rod to release both the proximal and distal ends of the tube from the tube sheet of the tube container.

[0089] In one embodiment, the pressure rod is moved to contact the distal end of the pressure tube at the grid point, and the distal end of the pressure tube can then be pushed with the pressure rod. When the pressure rod is inserted into the pressure tube, it can center the pressure tube within the pipe array, preventing the pressure tube from blocking the pipe array or hindering its movement.

[0090] In 1812, the method involved moving at least one of the pipe and the pressure pipe into the press.

[0091] In 1814, the method involved pressing at least one of a pipe and a pressure pipe with a press.

[0092] controller Figure 19A schematic diagram of an exemplary system 2000 for controlling a system for reducing the volume of piping and pressure lines in a nuclear reactor's piping container is shown. System 2000 may include a controller 2001 as described in this application. Controller 2001 includes a processor 2002 configured to implement processor-readable instructions, which, when executed, configure the processor 2002 to perform the operations described in this application. Processor 2002 may be a microprocessor or microcontroller, a digital signal processing (DSP) processor, an integrated circuit, a field-programmable gate array (FPGA), a reconfigurable processor, a programmable read-only memory (PROM), or a combination thereof. Controller 2001 may include a communication interface 2004 for communicating with other computing devices or sensor devices to access or connect to network resources, or to perform other computing applications by connecting to a network (or multiple networks) capable of transmitting data. In some examples, communication interface 2004 may include one or more buses, interconnects, wires, circuits, and / or any other connectors and / or control circuitry, or a combination thereof. Communication interface 2004 provides an interface for data communication between system 2000 and display 2015.

[0093] The controller 2001 may also include a connector for communicating with any one of the PT / CT processing tool 102, the volume reduction system 200, the actuator 107, the press 204, the feeder 205, and the grid sleeve processing tools 101, 201 according to the present disclosure, to transmit setpoints (one or more) or receive data such as position, orientation, PT / CT processing tool status, and other data.

[0094] Controller 2001 may be coupled to data system 2014 for storing system data and / or may be configured to communicate with cloud services such as iCloud, Dropbox, Google Cloud, or any other digital data server. Data system 2014 may also include a Universal Asynchronous Receiver / Transmitter (UART) to allow communication with other devices, such as smartphones or computers, to transmit data for analysis and / or storage. The UART may include or be coupled to a wireless transceiver for wireless communication with other such devices, such as via infrared, Bluetooth, Wi-Fi, etc. Network 2500 may include any wired or wireless communication path, such as circuitry. In some embodiments, network 2500 may include one or more buses, interconnects, wires, circuits, and / or any other connectors and / or control circuitry, or combinations thereof. In some embodiments, network 2500 may include a wired or wireless wide area network (WAN), local area network (LAN), or a combination thereof. In some embodiments, network 2500 may include a Bluetooth® network, a Bluetooth® Low Energy network, a Short Range communication network, etc.

[0095] The controller 2001 may include a memory 2006. The memory 2006 may include one or a combination of computer memories such as static random access memory (SRAM), random access memory (RAM), read-only memory (ROM), electro-optic memory, magneto-optic memory, erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferroelectric random access memory (FRAM), etc.

[0096] Memory 2006 may store application program 2012, which includes processor-readable instructions for performing the operations described in this application. In some embodiments, application program 2012 may include operations for controlling a system for reducing the volume of pipes and pressure pipes in a pipe container of a nuclear reactor according to this disclosure.

[0097] In one implementation, application 2012 may include operations for removing at least one of the pressure tubes and drain pipes from the nuclear reactor and for reducing the capacity of at least one of the pressure tubes and drain pipes.

[0098] Application 2012 may also include operations for sending data to at least one actuator to move a pressure rod to engage with the distal end of a pressure tube and push the distal end of the pressure tube toward the reduction system. In one embodiment, at least one actuator is configured to move the pressure rod to push the pressure tube while the tube is stationary.

[0099] Application 2012 may also include operations for sending data to at least one actuator to move the manifold rod to engage with the distal end of the manifold and push the distal end of the manifold toward the reduction system. In one embodiment, application 2012 sends data to couple the pressure rod and the manifold rod with a locking pin for simultaneous movement of the pressure rod and the manifold rod when actuated by at least one actuator.

[0100] Application 2012 may also include operations for sending data to the pipe pull rod to position the pipe removal head within the proximal end of the pipe and engage with the inner surface of the pipe; and operations for sending data to the pipe pull rod to pull the pipe toward the volume reduction system.

[0101] Application 2012 may also include operations for sending data to the pipe pull rod to push the proximal end of the pressure tube toward the grid point before sending data to the pipe pull rod to pull the pipe toward the volume reduction system.

[0102] Application 2012 may also include the operation of sending data to the feeder of the reduction system to engage with the proximal end of the pipe to pull the pipe into the reduction system. Feeder Application 2012 may also include operations that send data to the press to squeeze at least one of the pressure tube and the pipe.

[0103] Alternative implementation methods The above description is merely exemplary, and those skilled in the art will recognize that changes can be made to the described embodiments without departing from the scope of the disclosed invention. This disclosure may be embodied in other specific forms without departing from the subject matter of the claims. This disclosure is intended to cover and include all suitable changes in technical aspects. Modifications falling within the scope of this invention will be apparent to those skilled in the art upon reading this disclosure, and such modifications should be considered to fall within the scope of the appended claims. Furthermore, the scope of the claims should not be limited to the preferred embodiments set forth in the examples, but should be given the broadest interpretation consistent with the overall specification.

[0104] It is understood that the above description and the specific embodiments shown are merely exemplary. The present invention is defined by the appended claims.

[0105] The claims are not intended to include, and should not be construed as including, means-plus-function or step-plus-function limitations unless such limitations are expressly referred to in a given claim using “means for…” or “step for…”.

Claims

1. A system for reducing the volume of the piping and pressure pipes of a nuclear reactor's piping container, characterized in that, The system includes: Pressure pipe and pipe handling tools, the pressure pipe and pipe handling tools comprising: A pressure rod for engaging and pushing the distal end of the pressure tube; A pipe manifold rod, the pipe manifold rod being used to engage and push the distal end of the pipe; and At least one actuator is provided for moving at least one of the pressure tube rods toward or away from the pressure tube and for moving the tube rod toward or away from the tube. A capacity reduction system, comprising: A press, the press being used to extrude the pipes and the pressure pipes; A pipe removal head, the pipe removal head being used to engage with the inner surface of the pipe; and A feeder, the feeder being used to engage with the proximal end of the pipe to pull the pipe into the press; and A controller for coordinating the movement of the pressure rod, the pipe rod, the pipe removal head, and the feeder.

2. The system according to claim 1, characterized in that, The pressure tube and pipe handling tool includes a locking pin for coupling the pressure tube rod and the pipe rod to enable simultaneous movement of the pressure tube rod and the pipe rod when actuated by the at least one actuator.

3. The system according to any one of claims 1 or 2, characterized in that, The pipe rod is configured to move parallel to the longitudinal axis of the pipe, and wherein the pipe rod is configured to move between the outer surface of the pressure pipe and the inner surface of the distal end of the pipe.

4. The system according to claim 3, characterized in that, The inner surface of the distal end of the pipe is the flared conical surface of the pipe.

5. The system according to any one of claims 1-4, characterized in that, The pipe removal head is configured to engage with the inner surface of the proximal end of the pipe, and wherein the pipe removal head is configured to axially push the pressure tube toward a grid point on the opposite side of the nuclear reactor.

6. The system according to claim 5, characterized in that, The pipe removal head includes at least one clamp, which is configured to move to an extended position for engaging the inner surface of the pipe.

7. The system according to any one of claims 1-6, characterized in that, The controller is configured to: Data is sent to the at least one actuator to move the pressure tube rod to engage the distal end of the pressure tube and push the distal end of the pressure tube toward the volume reduction system.

8. The system according to claim 7, characterized in that, The at least one actuator is configured to move the pressure tube rod to push the pressure tube while the tube is stationary.

9. The system according to any one of claims 1-7, characterized in that, The controller is configured to: Data is sent to the at least one actuator to move the pipe rod to engage with the distal end of the pipe and push the distal end of the pipe toward the volume reduction system.

10. The system according to claim 1, characterized in that, The controller is configured to: Sending data to couple the pressure tube rod and the manifold rod to achieve simultaneous movement; and sending data to the at least one actuator to simultaneously push the distal end of the pressure tube and the distal end of the manifold towards the volume reduction system.

11. The system according to any one of claims 1-9, characterized in that, The controller is configured to: Data is sent to the pipe pull rod to position the pipe removal head within the proximal end of the pipe and engage with the inner surface of the pipe; and Data is sent to the pipe pull rod to pull the pipe toward the volume reduction system.

12. The system according to claim 11, characterized in that, The controller is configured to: Before sending data to the pipe pull rod to pull the pipe toward the volume reduction system, data is sent to the pipe pull rod to push the proximal end of the pressure tube toward the grid point.

13. The system according to any one of claims 1-12, characterized in that, The controller is configured to: Data is sent to the feeder to engage with the proximal end of the pipe to pull the pipe into the volume reduction system.

14. The system according to any one of claims 1-13, characterized in that, The controller is configured to: Data is sent to the press to compress at least one of the pressure tube and the pipe.

15. A method for reducing the volume of pipes and pressure pipes, characterized in that, The method includes: Provide a system according to any one of claims 1-14; Insert the pipe removal head into the proximal end of the pipe; The pipe removal head is pushed into the proximal end of the pressure tube to push the pressure tube into the grid point; Move the pipe rod to contact the distal end of the pipe; Simultaneously, the proximal end of the pipe is pulled by the pipe removal head, and the distal end of the pipe is pushed by the pipe rod to release the proximal end and the distal end of the pipe from the tube sheet of the pipe container; At least one of the pipe and the pressure pipe is moved into the press; and The press is used to compress at least one of the pipe and the pressure pipe.

16. The method according to claim 15, characterized in that, include: Move the pressure tube rod to contact the distal end of the pressure tube at the grid point; as well as The distal end of the pressure tube is pushed with the pressure tube rod.

17. A system for removing the pipes and pressure pipes of a pipework container from a nuclear reactor, characterized in that, The system includes: Pressure pipe and pipe handling tools, the pressure pipe and pipe handling tools comprising: A pressure rod for engaging and pushing the distal end of the pressure tube; A pipe manifold rod, the pipe manifold rod being used to engage and push the distal end of the pipe; and At least one actuator, the at least one actuator being used to move at least one of the pressure tube rods toward or away from the pressure tube and to move the tube rod toward or away from the tube; and A controller for coordinating the movement of the pressure rod and the manifold rod.

18. The system according to claim 17, characterized in that, The pressure tube and pipe handling tool includes a locking pin for coupling the pressure tube rod and the pipe rod to enable simultaneous movement of the pressure tube rod and the pipe rod when actuated by the at least one actuator.

19. The system according to any one of claims 17-18, characterized in that, The pipe rod is configured to move parallel to the longitudinal axis of the pipe, and wherein the pipe rod is configured to move between the outer surface of the pressure pipe and the inner surface of the distal end of the pipe.

20. The system according to claim 19, characterized in that, The inner surface of the distal end of the pipe is the flared conical surface of the pipe.

21. The system according to any one of claims 17-20, characterized in that, The controller is configured to: Data is sent to the at least one actuator to move the pressure tube rod to engage the distal end of the pressure tube and push the distal end of the pressure tube toward a grid point on the opposite side of the nuclear reactor.

22. The system according to claim 21, characterized in that, The at least one actuator is configured to move the pressure tube rod to push the pressure tube while the tube is stationary.

23. The system according to any one of claims 17-21, characterized in that, The controller is configured to: Data is sent to the at least one actuator to move the pipe rod to engage the distal end of the pipe and push the distal end of the pipe toward a grid point on the opposite side of the nuclear reactor.

24. The system according to claim 17, characterized in that, The controller is configured to: Data is sent to couple the pressure tube rod and the manifold rod to achieve simultaneous movement; and data is sent to the at least one actuator to simultaneously push the distal end of the pressure tube and the distal end of the manifold towards grid points on opposite sides of the nuclear reactor.

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