CA2916867A1 - System and method for nuclear reactor refurbishment - Google Patents
System and method for nuclear reactor refurbishment Download PDFInfo
- Publication number
- CA2916867A1 CA2916867A1 CA2916867A CA2916867A CA2916867A1 CA 2916867 A1 CA2916867 A1 CA 2916867A1 CA 2916867 A CA2916867 A CA 2916867A CA 2916867 A CA2916867 A CA 2916867A CA 2916867 A1 CA2916867 A1 CA 2916867A1
- Authority
- CA
- Canada
- Prior art keywords
- tool
- nuclear reactor
- refurbishment
- modular
- drive motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
A system nuclear reactor refurbishment including: a movement structure provided adjacent a nuclear reactor core, the movement structure including a platform configured to move horizontally and vertically; a tool carrier coupled to the underside of the platform and configured to be moved with the platform; and at least one tool carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment. A system for nuclear reactor refurbishment for a nuclear reactor, the nuclear reactor including a movement structure provided adjacent a nuclear reactor core, the movement structure including a platform configured to move horizontally and vertically, the system for nuclear reactor refurbishment includes: a tool carrier configured to be coupled to an underside of the platform and move with the platform; and at least one tool carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
Description
SYSTEM AND METHOD FOR NUCLEAR REACTOR REFURBISHMENT
FIELD
[0001] The present disclosure relates generally to nuclear reactor refurbishment.
More particularly, the present disclosure relates to a system and method for nuclear reactor refurbishment, with a focus on replacement of fuel channel and calandria tube components.
BACKGROUND
FIELD
[0001] The present disclosure relates generally to nuclear reactor refurbishment.
More particularly, the present disclosure relates to a system and method for nuclear reactor refurbishment, with a focus on replacement of fuel channel and calandria tube components.
BACKGROUND
[0002] After operating for a predetermined period of time nuclear reactors typically require major refurbishment to extend their operating life. As an example, after operating for approximately 25 years Candu nuclear reactors typically require major refurbishment to allow for continued operation for another approximately 35 years. This is generally termed Planned Life Extension (Plex). As part of the major refurbishment fuel channel and/or calandria tube components typically require replacement. The replacement procedure or portions of the replacement procedure is often referred to as retubing.
[0003] In light of the radiation risk and the size of the refurbishment operation, conventional systems and methods for nuclear reactor refurbishment have been known to be complex and typically require significant set up time and require significant costs, including costs for labor and materials, to be incurred.
[0004] As such, there is a need for an improved system and method for nuclear reactor refurbishment.
SUMMARY
SUMMARY
[0005] According to one aspect herein, there is provided a system for nuclear reactor refurbishment, the system includes: a movement structure provided adjacent a nuclear reactor core, the movement structure including a platform configured to move horizontally and vertically in relation to the nuclear reactor core; a tool carrier coupled to the underside of the platform and configured to move with the platform relative to the nuclear reactor core;
and at least one tool carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
r [0006] In a particular case, the system includes a rotary frame coupled to the tool carrier, wherein the rotary frame is configured to rotate the at least one tool around a vertical axis in relation to the nuclear reactor core.
[0007] In another particular case, the tool carrier includes fine adjustment mechanisms configured for adjustment of the at least one tool in the horizontal and vertical directions.
[0008] In still another case, the at least one tool includes a plurality of modular tools, wherein each modular tool comprises: at least one tool head for performing the operation related to nuclear reactor refurbishment; at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
[0009] In another aspect there is provided a system for nuclear reactor refurbishment including: a movement structure provided adjacent a nuclear reactor core; a tool carrier coupled to the movement structure and configured to be moved by the movement structure in horizontal and vertical directions relative to the nuclear reactor core;
and a plurality of modular tools carried by the tool carrier, wherein each modular tool includes:
at least one tool head for performing the operation related to nuclear reactor refurbishment; at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
[0010] In a particular case, the tool carrier is provided to the underside of the movement structure.
[0011] In another particular case, the system includes a rotary frame coupled to the tool carrier, wherein the rotary frame is configured to rotate the at least one modular tool around a vertical axis in relation to the nuclear reactor core.
[0012] In still another particular case, tool carrier includes fine adjustment mechanisms configured for adjustment of the at least one tool head in the horizontal and vertical directions.
[0013] In yet another particular case, each modular tool includes a fine adjustment mechanism configured for adjustment of the at least one tool head in the horizontal and vertical directions.
[0014] In still yet another particular case, the tool casing is configured to provide radiation shielding to the at least one tool.
[0015] In another particular case, the system further includes, a controller for controlling the at least one modular drive motor wherein the controller controls the at least one modular drive motor using adjustable parameters based on the operation to be performed by the at least one tool head.
[0016] In still another particular case, the at least one modular drive motor includes a plurality of modular drive motors configured to cause the at least one tool head to perform at least one of the following operations: grip, cut or rotate.
[0017] In yet another particular case, the tool casing includes a trap door on a lower side thereof configured for releasing a component removed from the nuclear reactor core.
[0018] In yet another aspect, there is provided a method for nuclear reactor refurbishment for a nuclear reactor, the nuclear reactor including a movement structure provided adjacent a nuclear reactor core, the movement structure including a platform configured to move horizontally and vertically in relation to the nuclear reactor core, the method for nuclear reactor refurbishment includes: providing a tool carrier to the platform positioned such that the tool carrier is below the platform; moving the tool carrier via the movement structure to position the tool carrier relative to a fuel channel for refurbishment;
performing fine adjustments to the vertical and horizontal position of the tool carrier to position a tool of the tool carrier relative to the fuel channel; extending a tool head from the tool towards the fuel channel by operating a modular drive motor of the modular tool;
performing an operation related to nuclear reactor refurbishment on the fuel channel by the tool and removing a component of the fuel channel; moving the tool carrier via the movement structure to position the tool carrier in relation to a disposal site that is positioned below the platform; and transferring the component to the disposal site.
[0019] In still another aspect, there is provided a system for nuclear reactor refurbishment for a nuclear reactor, the nuclear reactor including a movement structure provided adjacent a nuclear reactor core, the movement structure including a platform configured to move horizontally and vertically in relation to the nuclear reactor core, the system for nuclear reactor refurbishment includes: a tool carrier configured to be coupled to an underside of the platform and move together with the platform; and at least one tool , carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
[0020] In a particular case, the tool carrier includes fine adjustment mechanisms configured for adjustment of the at least one tool in the horizontal and vertical directions.
[0021] In another particular case, the at least one tool includes a plurality of modular tools, wherein each modular tool includes: at least one tool head for performing the operation related to nuclear reactor refurbishment; at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
[0022] In still another particular case, the system further includes a controller for controlling the at least one modular drive motor wherein the controller controls the at least one modular drive motor using adjustable parameters based on the operation to be performed by the at least one tool head.
[0023] Other aspects and features of the present disclosure will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments in conjunction with the accompanying figures.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Embodiments of the present disclosure will now be described, by way of example only, with reference to the attached Figures:
[0025] Figure 1 is a flowchart of an example procedure for refurbishing a nuclear reactor;
[0026] Figure 2 is an illustration of a system for nuclear reactor refurbishment according to an embodiment;
[0027] Figure 3 is a flowchart for a method of using the system for nuclear reactor refurbishment shown in Figure 2;
[0028] Figure 4 is an illustration of a system for nuclear reactor refurbishment according to another embodiment;
[0029] Figure 5 is a perspective view of the system for nuclear reactor refurbishment of Figure 4;
[0030] Figure 6 is a more detailed view of an embodiment of the tool suspension frame in the system for nuclear reactor refurbishment of Figure 4;
[0031] Figure 7 shows an embodiment of an end fitting removal tool for use with the system for nuclear reactor refurbishment of Figures 2 or 4;
[0032] Figure 8 shows the end fitting removal tool of Figure 7 in a retracted position (with transparent wall to show interior detail);
[0033] Figure 9 shows the end fitting removal tool of Figure 7 in an extended position;
[0034] Figure 10 shows the end fitting removal tool of Figure 7 in a retracted position and gripping the end fitting;
[0035] Figure 11 shows a generalized tool for use with the system for nuclear reactor refurbishment of Figures 2 or 4;
[0036] Figure 12 shows an embodiment of a pressure tube cut tool and the drive motors provided to the tool; and [0037] Figure 13 is a flowchart for an embodiment of a method for removing a tube using the system for nuclear reactor refurbishment shown in Figure 4.
DETAUKED DESCRIPTION
[0038] Generally, the present disclosure provides a system and method for nuclear reactor refurbishment. Refurbishment of a nuclear reactor is typically needed in order to extend the life of the nuclear reactor and to ensure the nuclear reactor meets the applicable safety standards.
[0039] A general example procedure for refurbishing a nuclear reactor is shown in the flowchart of Figure 1. First, a preparation stage 102 is undertaken to prepare the nuclear reactor for the refurbishment process. Next, in a removal stage 104 (sometimes called a "removal stage"), the components from the reactor are removed for subsequent disposal.
This stage is typically referred to as Removal Series. After removal, the replacement stage 106 involves installation of new components into the reactor. After replacement, the feeder and fuel installation stage 108 involves preparing the reactor to be operational once again.
As shown in Figure 1, each stage includes a number of steps that are required to achieve the outcome of the stage; these steps are typically dependent on the type of reactor.
[0040] The focus of this document will be on the removal/retubing stage 104, which involves the handling and removal of highly irradiated components. However, it will be ' understood that embodiments of the system and method described herein may be adapted for other operations in the refurbishment process, for example, by adapting appropriate tooling for additional operations. For example, embodiments of the system and method for nuclear reactor refurbishment herein may be modified to undertake one or more other operations or tasks; for example, inspection, adjustment, or the like, as described in the flowchart of Figure 1.
[0041] Figure 2 show a schematic diagram of a system for nuclear reactor refurbishment 200 according to an embodiment. In this embodiment, the system for nuclear reactor refurbishment 200 includes a movement framework or structure 201, typically including two columns 202 and 204 and a cross-beam or bridge 206 that extends between the columns 202, 204. In some embodiments, the movement structure 201 may be provided by an existing reactor structure, sometimes referred to as a reactor area bridge or a fuelling machine bridge. For example, a typical reactor will generally include a reactor area bridge in front of a reactor core 208, such as a calandria of a CANDU nuclear reactor, for, for example, purposes of fueling the nuclear reactor. In these cases, the reactor area bridge 206 can be moved in a vertical direction along the first and second columns 202, 204 (y-axis direction). A
fuelling platform is typically provided to the bridge and is configured to move along the bridge 206 in a horizontal direction (x-axis direction). The reactor core 208 will generally include multiple tubes (not shown), such as, for example, fuel channels, or the like. The reactor area bridge is generally configured such that the platform can be moved by a manual or automatic movement controller (not shown) along the x and y-axes to be positioned in front of and in proximity to any of the multiple tubes. By making use of the existing structure of the nuclear reactor, the system 200 is intended to reduce set up time and require less cost, labor and materials than conventional systems. Alternatively, if the existing reactor structure is not used because it is removed for maintenance or the like, a similar replacement movement structure may be installed in place of the existing reactor structure. Such a replacement movement structure will typically make use of the existing columns 202, 204.
[0042] In the embodiment of Figure 2, a carriage or tool carrier 210 is provided to the bridge 206 (the carriage 210 may, in some embodiments, be provided by the fuelling platform of the existing reactor structure) and supports a rotary frame 214 and one or more tools 212.
As with the fuelling platform described above, the carriage 210 is configured to be moveable horizontally along the bridge. The rotary frame 214 is configured to provide rotary motion
and at least one tool carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
r [0006] In a particular case, the system includes a rotary frame coupled to the tool carrier, wherein the rotary frame is configured to rotate the at least one tool around a vertical axis in relation to the nuclear reactor core.
[0007] In another particular case, the tool carrier includes fine adjustment mechanisms configured for adjustment of the at least one tool in the horizontal and vertical directions.
[0008] In still another case, the at least one tool includes a plurality of modular tools, wherein each modular tool comprises: at least one tool head for performing the operation related to nuclear reactor refurbishment; at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
[0009] In another aspect there is provided a system for nuclear reactor refurbishment including: a movement structure provided adjacent a nuclear reactor core; a tool carrier coupled to the movement structure and configured to be moved by the movement structure in horizontal and vertical directions relative to the nuclear reactor core;
and a plurality of modular tools carried by the tool carrier, wherein each modular tool includes:
at least one tool head for performing the operation related to nuclear reactor refurbishment; at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
[0010] In a particular case, the tool carrier is provided to the underside of the movement structure.
[0011] In another particular case, the system includes a rotary frame coupled to the tool carrier, wherein the rotary frame is configured to rotate the at least one modular tool around a vertical axis in relation to the nuclear reactor core.
[0012] In still another particular case, tool carrier includes fine adjustment mechanisms configured for adjustment of the at least one tool head in the horizontal and vertical directions.
[0013] In yet another particular case, each modular tool includes a fine adjustment mechanism configured for adjustment of the at least one tool head in the horizontal and vertical directions.
[0014] In still yet another particular case, the tool casing is configured to provide radiation shielding to the at least one tool.
[0015] In another particular case, the system further includes, a controller for controlling the at least one modular drive motor wherein the controller controls the at least one modular drive motor using adjustable parameters based on the operation to be performed by the at least one tool head.
[0016] In still another particular case, the at least one modular drive motor includes a plurality of modular drive motors configured to cause the at least one tool head to perform at least one of the following operations: grip, cut or rotate.
[0017] In yet another particular case, the tool casing includes a trap door on a lower side thereof configured for releasing a component removed from the nuclear reactor core.
[0018] In yet another aspect, there is provided a method for nuclear reactor refurbishment for a nuclear reactor, the nuclear reactor including a movement structure provided adjacent a nuclear reactor core, the movement structure including a platform configured to move horizontally and vertically in relation to the nuclear reactor core, the method for nuclear reactor refurbishment includes: providing a tool carrier to the platform positioned such that the tool carrier is below the platform; moving the tool carrier via the movement structure to position the tool carrier relative to a fuel channel for refurbishment;
performing fine adjustments to the vertical and horizontal position of the tool carrier to position a tool of the tool carrier relative to the fuel channel; extending a tool head from the tool towards the fuel channel by operating a modular drive motor of the modular tool;
performing an operation related to nuclear reactor refurbishment on the fuel channel by the tool and removing a component of the fuel channel; moving the tool carrier via the movement structure to position the tool carrier in relation to a disposal site that is positioned below the platform; and transferring the component to the disposal site.
[0019] In still another aspect, there is provided a system for nuclear reactor refurbishment for a nuclear reactor, the nuclear reactor including a movement structure provided adjacent a nuclear reactor core, the movement structure including a platform configured to move horizontally and vertically in relation to the nuclear reactor core, the system for nuclear reactor refurbishment includes: a tool carrier configured to be coupled to an underside of the platform and move together with the platform; and at least one tool , carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
[0020] In a particular case, the tool carrier includes fine adjustment mechanisms configured for adjustment of the at least one tool in the horizontal and vertical directions.
[0021] In another particular case, the at least one tool includes a plurality of modular tools, wherein each modular tool includes: at least one tool head for performing the operation related to nuclear reactor refurbishment; at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
[0022] In still another particular case, the system further includes a controller for controlling the at least one modular drive motor wherein the controller controls the at least one modular drive motor using adjustable parameters based on the operation to be performed by the at least one tool head.
[0023] Other aspects and features of the present disclosure will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments in conjunction with the accompanying figures.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Embodiments of the present disclosure will now be described, by way of example only, with reference to the attached Figures:
[0025] Figure 1 is a flowchart of an example procedure for refurbishing a nuclear reactor;
[0026] Figure 2 is an illustration of a system for nuclear reactor refurbishment according to an embodiment;
[0027] Figure 3 is a flowchart for a method of using the system for nuclear reactor refurbishment shown in Figure 2;
[0028] Figure 4 is an illustration of a system for nuclear reactor refurbishment according to another embodiment;
[0029] Figure 5 is a perspective view of the system for nuclear reactor refurbishment of Figure 4;
[0030] Figure 6 is a more detailed view of an embodiment of the tool suspension frame in the system for nuclear reactor refurbishment of Figure 4;
[0031] Figure 7 shows an embodiment of an end fitting removal tool for use with the system for nuclear reactor refurbishment of Figures 2 or 4;
[0032] Figure 8 shows the end fitting removal tool of Figure 7 in a retracted position (with transparent wall to show interior detail);
[0033] Figure 9 shows the end fitting removal tool of Figure 7 in an extended position;
[0034] Figure 10 shows the end fitting removal tool of Figure 7 in a retracted position and gripping the end fitting;
[0035] Figure 11 shows a generalized tool for use with the system for nuclear reactor refurbishment of Figures 2 or 4;
[0036] Figure 12 shows an embodiment of a pressure tube cut tool and the drive motors provided to the tool; and [0037] Figure 13 is a flowchart for an embodiment of a method for removing a tube using the system for nuclear reactor refurbishment shown in Figure 4.
DETAUKED DESCRIPTION
[0038] Generally, the present disclosure provides a system and method for nuclear reactor refurbishment. Refurbishment of a nuclear reactor is typically needed in order to extend the life of the nuclear reactor and to ensure the nuclear reactor meets the applicable safety standards.
[0039] A general example procedure for refurbishing a nuclear reactor is shown in the flowchart of Figure 1. First, a preparation stage 102 is undertaken to prepare the nuclear reactor for the refurbishment process. Next, in a removal stage 104 (sometimes called a "removal stage"), the components from the reactor are removed for subsequent disposal.
This stage is typically referred to as Removal Series. After removal, the replacement stage 106 involves installation of new components into the reactor. After replacement, the feeder and fuel installation stage 108 involves preparing the reactor to be operational once again.
As shown in Figure 1, each stage includes a number of steps that are required to achieve the outcome of the stage; these steps are typically dependent on the type of reactor.
[0040] The focus of this document will be on the removal/retubing stage 104, which involves the handling and removal of highly irradiated components. However, it will be ' understood that embodiments of the system and method described herein may be adapted for other operations in the refurbishment process, for example, by adapting appropriate tooling for additional operations. For example, embodiments of the system and method for nuclear reactor refurbishment herein may be modified to undertake one or more other operations or tasks; for example, inspection, adjustment, or the like, as described in the flowchart of Figure 1.
[0041] Figure 2 show a schematic diagram of a system for nuclear reactor refurbishment 200 according to an embodiment. In this embodiment, the system for nuclear reactor refurbishment 200 includes a movement framework or structure 201, typically including two columns 202 and 204 and a cross-beam or bridge 206 that extends between the columns 202, 204. In some embodiments, the movement structure 201 may be provided by an existing reactor structure, sometimes referred to as a reactor area bridge or a fuelling machine bridge. For example, a typical reactor will generally include a reactor area bridge in front of a reactor core 208, such as a calandria of a CANDU nuclear reactor, for, for example, purposes of fueling the nuclear reactor. In these cases, the reactor area bridge 206 can be moved in a vertical direction along the first and second columns 202, 204 (y-axis direction). A
fuelling platform is typically provided to the bridge and is configured to move along the bridge 206 in a horizontal direction (x-axis direction). The reactor core 208 will generally include multiple tubes (not shown), such as, for example, fuel channels, or the like. The reactor area bridge is generally configured such that the platform can be moved by a manual or automatic movement controller (not shown) along the x and y-axes to be positioned in front of and in proximity to any of the multiple tubes. By making use of the existing structure of the nuclear reactor, the system 200 is intended to reduce set up time and require less cost, labor and materials than conventional systems. Alternatively, if the existing reactor structure is not used because it is removed for maintenance or the like, a similar replacement movement structure may be installed in place of the existing reactor structure. Such a replacement movement structure will typically make use of the existing columns 202, 204.
[0042] In the embodiment of Figure 2, a carriage or tool carrier 210 is provided to the bridge 206 (the carriage 210 may, in some embodiments, be provided by the fuelling platform of the existing reactor structure) and supports a rotary frame 214 and one or more tools 212.
As with the fuelling platform described above, the carriage 210 is configured to be moveable horizontally along the bridge. The rotary frame 214 is configured to provide rotary motion
- 6 -about the Y axis. In this embodiment, the one or more tools 212 are mounted on the rotary frame 214.
[0043] In order to work on a tube in the reactor core 208, one or more of the tools 212 is positioned in front of a fuel channel to be operated on by moving the bridge 206 vertically (y-axis) and the carriage 210 horizontally (x-axis). The fuel channel typically includes various components such as a pressure tube, an end fitting, a bellows and the like.
Refurbishment of a fuel channel may include various operations as shown in FIG. 1; for example, removing the end fitting (EF), removing the pressure tube (PT), cutting the pressure tube, cutting the bellows, removing the calandria tube, releasing and removing the calandria tube insert (CTI), or the like. The one or more tools 212 are positioned in front of a fuel channel. For example, the tools may be lined up with the fuel channel through movement of appropriate ones of the bridge 206, carriage 210 and/or rotary frame 214.
The positioning of the tools 212 may be manual, by, for example, an operator, or automatic, by, for example, a processor or movement controller (not shown).
[0044] For the refurbishment/removal of a fuel channel, the tools 212 are positioned in front of the fuel channel that is desired to be refurbished. One or more of the tools 212 are then operated to perform a task in relation to the refurbishment of the fuel channel depending on the component of the fuel channel being handled.
[0045] For example, one of the tools 212 may be extended forward to grasp the end fitting using a gripper or other suitable technique. The tool 212 may then retract away from the reactor core 208 such that the end fitting is fully removed from the reactor core 208. The bridge 206 is lowered and the rotary frame 214 is rotated such that the end fitting is positioned on a side of the bridge 206 that is opposite the reactor core 208 face. This may be orthogonal or at another angle depending on the location of the waste containers. The The end fitting is then placed into a flask 216 or carrier. For example, the tool 212 may place the end fitting in the flask 216, or a receiving tool on the floor may pull the end fitting into the flask 216. In some cases, there may be a trough (not shown) or other guidance structure to guide the end fitting into the carrier. In further cases, the guidance structure (not shown) may allow the rotary frame 214 to not have to fully rotate with the end fitting, such as only rotating the end fitting by a partial angle. In yet other cases, the guidance structure may allow the tool 212 to release the end fitting for placement in the flask 216 without having to first lower the bridge 206.
[0043] In order to work on a tube in the reactor core 208, one or more of the tools 212 is positioned in front of a fuel channel to be operated on by moving the bridge 206 vertically (y-axis) and the carriage 210 horizontally (x-axis). The fuel channel typically includes various components such as a pressure tube, an end fitting, a bellows and the like.
Refurbishment of a fuel channel may include various operations as shown in FIG. 1; for example, removing the end fitting (EF), removing the pressure tube (PT), cutting the pressure tube, cutting the bellows, removing the calandria tube, releasing and removing the calandria tube insert (CTI), or the like. The one or more tools 212 are positioned in front of a fuel channel. For example, the tools may be lined up with the fuel channel through movement of appropriate ones of the bridge 206, carriage 210 and/or rotary frame 214.
The positioning of the tools 212 may be manual, by, for example, an operator, or automatic, by, for example, a processor or movement controller (not shown).
[0044] For the refurbishment/removal of a fuel channel, the tools 212 are positioned in front of the fuel channel that is desired to be refurbished. One or more of the tools 212 are then operated to perform a task in relation to the refurbishment of the fuel channel depending on the component of the fuel channel being handled.
[0045] For example, one of the tools 212 may be extended forward to grasp the end fitting using a gripper or other suitable technique. The tool 212 may then retract away from the reactor core 208 such that the end fitting is fully removed from the reactor core 208. The bridge 206 is lowered and the rotary frame 214 is rotated such that the end fitting is positioned on a side of the bridge 206 that is opposite the reactor core 208 face. This may be orthogonal or at another angle depending on the location of the waste containers. The The end fitting is then placed into a flask 216 or carrier. For example, the tool 212 may place the end fitting in the flask 216, or a receiving tool on the floor may pull the end fitting into the flask 216. In some cases, there may be a trough (not shown) or other guidance structure to guide the end fitting into the carrier. In further cases, the guidance structure (not shown) may allow the rotary frame 214 to not have to fully rotate with the end fitting, such as only rotating the end fitting by a partial angle. In yet other cases, the guidance structure may allow the tool 212 to release the end fitting for placement in the flask 216 without having to first lower the bridge 206.
- 7 -[0046] In some cases, the fuel channel may be processed by a volume reduction mechanism 218 before being placed in the flask 216 or other carrier. The volume reduction mechanism 218 reduces the volume of the component so that it is easier to store by, for example, compressing a component, cutting a component, squeezing a component, or the like. In other embodiments, the tube may not have any volume reduction performed.
[0047] The use of a rotary frame 214 is intended to allow manipulation of the component for placement of the component into the flask 216 or volume reduction mechanism 218 located below without interfering with the bridge 206 when being lowered.
[0048] A method 300 for removing a tube using the system for nuclear reactor refurbishment 200 is shown in Figure 3. At 302, the system 200 is positioned in front of the fuel channel to be replaced. In some cases, at 304, fine adjustment of the X
and Y axes may be performed by the tool carrier to more accurately position the tool. At 306, the tool 212 is extended along the Z-axis to operate on the components of the fuel channel and the components are removed from the reactor core 208 using one or more of the tools 212. It will be understood that a first tool may perform an operation such as cutting and a second tool may perform the removal of the component. In these situations, the positioning of each tool can be repeated as necessary before performing the operation. At 308, the rotary frame 214 rotates such that the removed component is rotated away from the face of the reactor core 208, generally to position the component for deposit in storage or volume reduction. The angle may be perpendicular to the face of the reactor core or some other suitable angle such as 120 degrees or the like. At 310, the tool/bridge will be positioned to bring the component into position for further processing (e.g. volume reduction) or storage. At 312, the tool 212 releases the component into the flask 216, the volume reduction mechanism 218, or the like.
[0049] Figure 4 is a schematic illustration of another embodiment of a system 400 for nuclear reactor refurbishment. Figure 5 shows a perspective view of the system 400 of Figure 4 providing additional detail on the arrangement of the tools. In this embodiment, the system 400 for nuclear reactor refurbishment is intended to makes use of a similar movement structure 401 to that of the movement structure 201 of Fig. 2 (either an existing reactor structure, a temporary structure, or a purpose-built structure), including columns 402 and 404 and a reactor area bridge 406 for movement of tools 412 in relation to the reactor core 408 (including a plurality of fuel channels).
[0047] The use of a rotary frame 214 is intended to allow manipulation of the component for placement of the component into the flask 216 or volume reduction mechanism 218 located below without interfering with the bridge 206 when being lowered.
[0048] A method 300 for removing a tube using the system for nuclear reactor refurbishment 200 is shown in Figure 3. At 302, the system 200 is positioned in front of the fuel channel to be replaced. In some cases, at 304, fine adjustment of the X
and Y axes may be performed by the tool carrier to more accurately position the tool. At 306, the tool 212 is extended along the Z-axis to operate on the components of the fuel channel and the components are removed from the reactor core 208 using one or more of the tools 212. It will be understood that a first tool may perform an operation such as cutting and a second tool may perform the removal of the component. In these situations, the positioning of each tool can be repeated as necessary before performing the operation. At 308, the rotary frame 214 rotates such that the removed component is rotated away from the face of the reactor core 208, generally to position the component for deposit in storage or volume reduction. The angle may be perpendicular to the face of the reactor core or some other suitable angle such as 120 degrees or the like. At 310, the tool/bridge will be positioned to bring the component into position for further processing (e.g. volume reduction) or storage. At 312, the tool 212 releases the component into the flask 216, the volume reduction mechanism 218, or the like.
[0049] Figure 4 is a schematic illustration of another embodiment of a system 400 for nuclear reactor refurbishment. Figure 5 shows a perspective view of the system 400 of Figure 4 providing additional detail on the arrangement of the tools. In this embodiment, the system 400 for nuclear reactor refurbishment is intended to makes use of a similar movement structure 401 to that of the movement structure 201 of Fig. 2 (either an existing reactor structure, a temporary structure, or a purpose-built structure), including columns 402 and 404 and a reactor area bridge 406 for movement of tools 412 in relation to the reactor core 408 (including a plurality of fuel channels).
- 8 -[0050] In the embodiment of Figures 4 and 5, a carriage or tool carrier 410 is provided to a fuelling platform or to the bridge 406, similar to the embodiment of Figure 2;
however, in this embodiment the carriage 410 is provided to a lower side or bottom of the fuelling platform or the bridge 406 and the one or more tools 412 are attached to the carriage 410 such that they are also located on the underside (the side closest to the ground) of the carriage 410. With this arrangement of mounting the one or more tools 412 on the underside of the bridge 406, it is intended that the components of the fuel channel can be more easily manipulated and handled, for example, the components may be more easily lowered into the flask 416 or volume reduction mechanism 418 without the need for complex systems for moving the components over the top of the bridge 406 in order to move them to the flask 416 or volume reduction mechanism 418. In some embodiments, the carriage 410 may include a rotary frame to support the tools 412 and allow rotation of the tools 412;
however, this is generally not needed in the same way as the embodiment of Figure 2 because the carriage 410 is mounted below the bridge 406.
[0051] In this embodiment, there are three tools 412 shown, however, an appropriate number of tools can be provided depending on the size of the carriage, the weight of the tools, the task(s) to be accomplished and other factors.
[0052] Similar to the embodiment of Figure 2, the bridge 406 moves vertically along the columns (Y-axis) and the fuelling platform and/or carriage 410 move horizontally along the bridge (X-axis). Individual tools or tool heads can be moved forward and backward toward and away from the fuel channels (Z-axis) during operation as explained in further detail below.
[0053] Figure 6 shows additional detail of the carriage 410, in this case, including a tool suspension frame or tool carrier420. The tool suspension frame 420 includes adjustment mechanisms 422, 424 to allow for fine adjustment of tool position along the X
and Y-axes.
The tool suspension frame 420 includes attachment sites for one or more tools, in this case, three tools 412. In some cases, the tools 412 are designed in a modular fashion to have similar sized exterior shapes and similar parts (as described further below) so that tools can be easily replaced when changing operations or due to tool wear, breakdown or the like.
[0054] Figure 7 shows an embodiment of a modular tool 500 configured to be used as an end fitting removal tool. Figure 7 illustrates an end fitting 501 (without the remainder of the fuel channel or calandria around it). The modular tool 500 includes a casing 502 that may
however, in this embodiment the carriage 410 is provided to a lower side or bottom of the fuelling platform or the bridge 406 and the one or more tools 412 are attached to the carriage 410 such that they are also located on the underside (the side closest to the ground) of the carriage 410. With this arrangement of mounting the one or more tools 412 on the underside of the bridge 406, it is intended that the components of the fuel channel can be more easily manipulated and handled, for example, the components may be more easily lowered into the flask 416 or volume reduction mechanism 418 without the need for complex systems for moving the components over the top of the bridge 406 in order to move them to the flask 416 or volume reduction mechanism 418. In some embodiments, the carriage 410 may include a rotary frame to support the tools 412 and allow rotation of the tools 412;
however, this is generally not needed in the same way as the embodiment of Figure 2 because the carriage 410 is mounted below the bridge 406.
[0051] In this embodiment, there are three tools 412 shown, however, an appropriate number of tools can be provided depending on the size of the carriage, the weight of the tools, the task(s) to be accomplished and other factors.
[0052] Similar to the embodiment of Figure 2, the bridge 406 moves vertically along the columns (Y-axis) and the fuelling platform and/or carriage 410 move horizontally along the bridge (X-axis). Individual tools or tool heads can be moved forward and backward toward and away from the fuel channels (Z-axis) during operation as explained in further detail below.
[0053] Figure 6 shows additional detail of the carriage 410, in this case, including a tool suspension frame or tool carrier420. The tool suspension frame 420 includes adjustment mechanisms 422, 424 to allow for fine adjustment of tool position along the X
and Y-axes.
The tool suspension frame 420 includes attachment sites for one or more tools, in this case, three tools 412. In some cases, the tools 412 are designed in a modular fashion to have similar sized exterior shapes and similar parts (as described further below) so that tools can be easily replaced when changing operations or due to tool wear, breakdown or the like.
[0054] Figure 7 shows an embodiment of a modular tool 500 configured to be used as an end fitting removal tool. Figure 7 illustrates an end fitting 501 (without the remainder of the fuel channel or calandria around it). The modular tool 500 includes a casing 502 that may
- 9 -provide radiation shielding. The modular tool 500 also includes a tool head 503 for operating on the end fitting 501. The modular tool 500 also includes at least one drive motor 504 which is configured to extend the tool head 503 and actuate the tool head 503. In this case, the drive motor 504 is provided to an exterior of the casing 502. Here, the drive motor 504 is positioned at an end of the modular tool 500 that faces away from the reactor core. This placement is intended to simplify cable tracks and allow for easier access to the drive motor 504. In some embodiments, the drive motor 504 is common among various types of modular tools in order to allow for easier maintenance, replacement parts, and the like.
[0055] The drive motor is controlled by a controller 510. The controller 510 may be integral to the modular tool 500 or may be provided remotely and electrically connected to the drive motor 504. The controller is configured to control the drive motor 504 based on the functionality of the particular tool head 503 of the modular tool 500 and may include various adjustable parameters to allow the drive motor 504 to drive the tool head 503 to perform the appropriate action.
[0056] As shown in Figure 7, some modular tools 500 may be provided with a trap door 506, for example, to provide shielding, on a base of the tool. The trap door 506 can also allow for easier transfer of a component of the fuel channel after removal or the like by opening to allow the component to be deposited for further processing.
[0057] Figures 8, 9 and 10 illustrate an example operation of an end fitting removal tool 800, similar to that of Figure 7, according to one embodiment. In Figure 8, the end fitting removal tool 800 is brought into position in front of a fuel channel with an end fitting 802 (shown without the surrounding fuel channel and calandria) by manipulating the X and Y axis movement. In Figures 8, 9, and 10, the end fitting removal tool 802 is illustrated as transparent to show internal features. In Figure 9, a tool head or gripper 806 of the end fitting removal tool 800 is advanced along the Z axis by a drive motor 804 so that the gripper 806 can grip the end fitting 802. In some cases, the gripping of the end fitting 802 may be accomplished by activating another drive motor 805 provided to the end fitting removal tool 800. In Figure 10, the gripper 806 and end fitting 802 have been retracted into the end fitting removal tool 800 by operation of the drive motor 804. The tool 800 can then be moved along the X and Y axes to bring the tool into position to release the end fitting 802 into a waste container or the like.
[0055] The drive motor is controlled by a controller 510. The controller 510 may be integral to the modular tool 500 or may be provided remotely and electrically connected to the drive motor 504. The controller is configured to control the drive motor 504 based on the functionality of the particular tool head 503 of the modular tool 500 and may include various adjustable parameters to allow the drive motor 504 to drive the tool head 503 to perform the appropriate action.
[0056] As shown in Figure 7, some modular tools 500 may be provided with a trap door 506, for example, to provide shielding, on a base of the tool. The trap door 506 can also allow for easier transfer of a component of the fuel channel after removal or the like by opening to allow the component to be deposited for further processing.
[0057] Figures 8, 9 and 10 illustrate an example operation of an end fitting removal tool 800, similar to that of Figure 7, according to one embodiment. In Figure 8, the end fitting removal tool 800 is brought into position in front of a fuel channel with an end fitting 802 (shown without the surrounding fuel channel and calandria) by manipulating the X and Y axis movement. In Figures 8, 9, and 10, the end fitting removal tool 802 is illustrated as transparent to show internal features. In Figure 9, a tool head or gripper 806 of the end fitting removal tool 800 is advanced along the Z axis by a drive motor 804 so that the gripper 806 can grip the end fitting 802. In some cases, the gripping of the end fitting 802 may be accomplished by activating another drive motor 805 provided to the end fitting removal tool 800. In Figure 10, the gripper 806 and end fitting 802 have been retracted into the end fitting removal tool 800 by operation of the drive motor 804. The tool 800 can then be moved along the X and Y axes to bring the tool into position to release the end fitting 802 into a waste container or the like.
- 10-[0058] Figure 11 illustrates an embodiment showing elements of a general modular tool 900. In particular, as shown in Figure 11, each modular tool 900 is intended to include a common tool frame or casing 902. In Figure 11, the modular tool casing 902 is shown as transparent to illustrate internal features. The tool frame or casing 902 may provide radiation shielding when needed for a particular activity. The actual tool provided in the casing will depend on the particular task to be accomplished and may include a gripper as noted above for the end fitting removal tool, or may include various other tools such as those described below. The modular tool 900 includes one or more drive motors 904. In this case, the drive motors are provided at an end of the casing 902 away from the reactor core (that is, at the back of the casing 902). In some embodiment, the modular tool may include as many motors as can fit, for example, in the present embodiments, there may be as many as four drive motors 904. Generally speaking, a sufficient number of drive motors can be provided on the tool as needed for the particular task to be accomplished. In one example involving four drive motors 904, there may be three axial ball screw actuators and one ball spline shaft to provide rotary motion.
[0059] Figure 12 illustrates another embodiment of a general modular tool showing the drive motors 1004 for an embodiment to be used as a pressure tube cut tool. In this embodiment, there are three drives. A first drive motor is a ball screw for the main carriage and provides a stroke to extend the cutters into the fuel channel. A
second drive motor is a ball screw to provide axial motion to extend the cutters. A third drive motor is a ball spline to provide rotary motion for the rotating cutters. As noted above, the drive motors can be standardized among the tools to enhance the modularity of the tools.
Further, also as noted, the modular drive motors can interface with a controller using adjustable parameters in order to allow programmability of the drive motors with the intention of simplifying operation and reducing costs.
[0060] Similar to the embodiments of Figure 2 and Figure 4, for the refurbishment/removal of components of a fuel channel, the general modular tool 1000 is positioned in front of the fuel channel that is to be operated on. The component of the fuel channel is then operated on and, with suitable adjustment of tools where needed, removed from the reactor core. The component can then be deposited into either the flask or waste container or the volume reduction mechanism.
[0059] Figure 12 illustrates another embodiment of a general modular tool showing the drive motors 1004 for an embodiment to be used as a pressure tube cut tool. In this embodiment, there are three drives. A first drive motor is a ball screw for the main carriage and provides a stroke to extend the cutters into the fuel channel. A
second drive motor is a ball screw to provide axial motion to extend the cutters. A third drive motor is a ball spline to provide rotary motion for the rotating cutters. As noted above, the drive motors can be standardized among the tools to enhance the modularity of the tools.
Further, also as noted, the modular drive motors can interface with a controller using adjustable parameters in order to allow programmability of the drive motors with the intention of simplifying operation and reducing costs.
[0060] Similar to the embodiments of Figure 2 and Figure 4, for the refurbishment/removal of components of a fuel channel, the general modular tool 1000 is positioned in front of the fuel channel that is to be operated on. The component of the fuel channel is then operated on and, with suitable adjustment of tools where needed, removed from the reactor core. The component can then be deposited into either the flask or waste container or the volume reduction mechanism.
-11-. [0061] An embodiment of a method 1100 for removing components of a fuel channel using the system for nuclear reactor refurbishment 400 is illustrated in Figure 13. At 1102, a tool is positioned in front of the fuel channel to be operated on. In some cases, at 1104, fine adjustment of the X and Y axes may be performed by the adjustment mechanism of the tool carrier to more accurately position the tool. At 1106, the tool is extended along the Z axis to operate on the components of the fuel channel and the components are removed from the reactor core using one or more of the tools. It will be understood that, in some cases, a first tool may perform an operation such as cutting and a second tool may perform the removal of the component. In these situations, the positioning of each tool (including fine adjustment) can be repeated before performing the operation. At 1108, the tool/bridge will be positioned to bring the component into position for further processing (e.g. volume reduction) or storage.
At 1110, the tool releases the component into the flask 416, the volume reduction mechanism 418, or the like. Due to the mounting of the tool carriage 410 and tools 412 on the underside of the bridge 406, the components of the fuel channel can be easily lowered or dropped or otherwise placed into the flask 416, volume reduction mechanism 418 or the like.
[0062] In the above embodiments, the tools 212, 412 and/or tool heads 503, 806 may be selected to complete appropriate operations related to nuclear reactors. Non-limiting examples of tools 212, 412 and tool heads 503, 806 for use in the system for nuclear reactor refurbishment 200, 400 are the following:
= For common operations:
o Primary Heat Transport (PHT) vacuum drying o Channel drain tool o PHT moderator drying o Retube work platform o Retube Tool Carrier o Worktables o Feeder platform o Custom rigging o Retube control center o Power distribution system o Video observation system o Voice communication system
At 1110, the tool releases the component into the flask 416, the volume reduction mechanism 418, or the like. Due to the mounting of the tool carriage 410 and tools 412 on the underside of the bridge 406, the components of the fuel channel can be easily lowered or dropped or otherwise placed into the flask 416, volume reduction mechanism 418 or the like.
[0062] In the above embodiments, the tools 212, 412 and/or tool heads 503, 806 may be selected to complete appropriate operations related to nuclear reactors. Non-limiting examples of tools 212, 412 and tool heads 503, 806 for use in the system for nuclear reactor refurbishment 200, 400 are the following:
= For common operations:
o Primary Heat Transport (PHT) vacuum drying o Channel drain tool o PHT moderator drying o Retube work platform o Retube Tool Carrier o Worktables o Feeder platform o Custom rigging o Retube control center o Power distribution system o Video observation system o Voice communication system
- 12-= For removal operations:
o Feeder coupling disconnect o Closure plug removal o Positioning assembly removal o Pressure tube cutting o Shield plug removal o Bellows cutting o End fitting removal o Lattice sleeve and plug tool o Calandria tube insert release o Calandria tube insert removal o Calandria tube guide tool o Calandria tube removal o Pressure tube removal o Volume reduction system = For inspection operations:
o General inspection cameras o Calandria vessel inspection o CV debris removal o Calandria Tube Sheet Bore (CTSB) inspection o CTSB cleaning tool o CTSB bore gage tool o Lattice inspection o Bellows deburring tool o Bellows bore cleaning = For installation operations:
o Fuel channel component prep o Calandria Tube (CT) guide tool o CT installation tool o CT rolling o Leak test o Bellows weld tool
o Feeder coupling disconnect o Closure plug removal o Positioning assembly removal o Pressure tube cutting o Shield plug removal o Bellows cutting o End fitting removal o Lattice sleeve and plug tool o Calandria tube insert release o Calandria tube insert removal o Calandria tube guide tool o Calandria tube removal o Pressure tube removal o Volume reduction system = For inspection operations:
o General inspection cameras o Calandria vessel inspection o CV debris removal o Calandria Tube Sheet Bore (CTSB) inspection o CTSB cleaning tool o CTSB bore gage tool o Lattice inspection o Bellows deburring tool o Bellows bore cleaning = For installation operations:
o Fuel channel component prep o Calandria Tube (CT) guide tool o CT installation tool o CT rolling o Leak test o Bellows weld tool
-13-= 0 PT subassembly installation o Positioning assembly o Shield plug installation o Closure plug installation o Bellows cutting o Contingency toolset o New fuel loading [0063] As conventional systems for nuclear reactor refurbishment typically require construction or set up of columns and a bridge or platform, it is an intended advantage that using the existing nuclear reactor bridge structure can result in significant time and cost savings.
[0064] It is also intended that the embodiments described herein can provide at least the advantages of:
= Lower overall cost for tooling procurement, management and execution due to, at least, the modular nature of the tools;
= Improved schedules - reduce or eliminate tooling development, deployment and execution from critical path of overall reactor refurbishment schedule or tooling development, deployment and execution because of a simplified structure and procedure for handling components, including handling the components below the bridge;
= Reduce risks for costs and schedules in reactor refurbishment tooling execution; and = Provide lifecycle management of tooling including tooling execution and design improvements.
[0065] In the preceding description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the embodiments.
However, it will be apparent to one skilled in the art that these specific details may not be required. In other instances, well-known structures may be shown in block diagram form in order not to obscure the understanding. For example, specific details are not provided as to whether the embodiments described herein or elements thereof are implemented as a software routine, hardware circuit, firmware, or a combination thereof.
[0066] Embodiments of the disclosure or elements thereof may be represented as a computer program product stored in a machine-readable medium (also referred to as a
[0064] It is also intended that the embodiments described herein can provide at least the advantages of:
= Lower overall cost for tooling procurement, management and execution due to, at least, the modular nature of the tools;
= Improved schedules - reduce or eliminate tooling development, deployment and execution from critical path of overall reactor refurbishment schedule or tooling development, deployment and execution because of a simplified structure and procedure for handling components, including handling the components below the bridge;
= Reduce risks for costs and schedules in reactor refurbishment tooling execution; and = Provide lifecycle management of tooling including tooling execution and design improvements.
[0065] In the preceding description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the embodiments.
However, it will be apparent to one skilled in the art that these specific details may not be required. In other instances, well-known structures may be shown in block diagram form in order not to obscure the understanding. For example, specific details are not provided as to whether the embodiments described herein or elements thereof are implemented as a software routine, hardware circuit, firmware, or a combination thereof.
[0066] Embodiments of the disclosure or elements thereof may be represented as a computer program product stored in a machine-readable medium (also referred to as a
- 14 -computer-readable medium, a processor-readable medium, or a computer usable medium having a computer-readable program code embodied therein). The machine-readable medium can be any suitable tangible, non-transitory medium, including magnetic, optical, or electrical storage medium including a diskette, compact disk read only memory (CD-ROM), memory device (volatile or non-volatile), or similar storage mechanism. The machine-readable medium can contain various sets of instructions, code sequences, configuration information, or other data, which, when executed, cause a processor to perform steps in a method according to an embodiment of the disclosure. Those of ordinary skill in the art will appreciate that other instructions and operations necessary to implement the described implementations can also be stored on the machine-readable medium. The instructions stored on the machine-readable medium can be executed by a processor or other suitable processing device, and can interface with circuitry to perform the described tasks.
[0067] The above-described embodiments are intended to be examples only.
Alterations, modifications and variations can be effected to the particular embodiments by those of skill in the art. The scope of the claims should not be limited by the particular embodiments set forth herein, but should be construed in a manner consistent with the specification as a whole.
[0067] The above-described embodiments are intended to be examples only.
Alterations, modifications and variations can be effected to the particular embodiments by those of skill in the art. The scope of the claims should not be limited by the particular embodiments set forth herein, but should be construed in a manner consistent with the specification as a whole.
- 15-
Claims (18)
1. A system for nuclear reactor refurbishment comprising:
a movement structure provided adjacent a nuclear reactor core, the movement structure comprising a platform configured to move horizontally and vertically in relation to the nuclear reactor core;
a tool carrier coupled to the underside of the platform and configured to move with the platform relative to the nuclear reactor core; and at least one tool carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
a movement structure provided adjacent a nuclear reactor core, the movement structure comprising a platform configured to move horizontally and vertically in relation to the nuclear reactor core;
a tool carrier coupled to the underside of the platform and configured to move with the platform relative to the nuclear reactor core; and at least one tool carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
2. A system according to claim 1 further comprising a rotary frame coupled to the tool carrier, wherein the rotary frame is configured to rotate the at least one tool around a vertical axis in relation to the nuclear reactor core.
3. A system according to claim 1 or claim 2, wherein the tool carrier further comprises fine adjustment mechanisms configured for adjustment of the at least one tool in the horizontal and vertical directions.
4. A system according to any one of claims 1 to 3, wherein the at least one tool comprises a plurality of modular tools, wherein each modular tool comprises:
at least one tool head for performing the operation related to nuclear reactor refurbishment;
at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
at least one tool head for performing the operation related to nuclear reactor refurbishment;
at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
5. A system for nuclear reactor refurbishment comprising:
a movement structure provided adjacent a nuclear reactor core;
a tool carrier coupled to the movement structure and configured to be moved by the movement structure in horizontal and vertical directions relative to the nuclear reactor core; and a plurality of modular tools carried by the tool carrier, wherein each modular tool comprises:
at least one tool head for performing the operation related to nuclear reactor refurbishment;
at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
a movement structure provided adjacent a nuclear reactor core;
a tool carrier coupled to the movement structure and configured to be moved by the movement structure in horizontal and vertical directions relative to the nuclear reactor core; and a plurality of modular tools carried by the tool carrier, wherein each modular tool comprises:
at least one tool head for performing the operation related to nuclear reactor refurbishment;
at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
6. A system according to claim 5, wherein the tool carrier is provided to the underside of the movement structure.
7. A system according to claim 5 or claim 6 further comprising:
a rotary frame coupled to the tool carrier, wherein the rotary frame is configured to rotate the at least one modular tool around a vertical axis in relation to the nuclear reactor core.
a rotary frame coupled to the tool carrier, wherein the rotary frame is configured to rotate the at least one modular tool around a vertical axis in relation to the nuclear reactor core.
8. A system according to any one of claims 5 to 7, wherein the tool carrier further comprises fine adjustment mechanisms configured for adjustment of the at least one tool head in the horizontal and vertical directions.
9. A system according to any one of claims 5 to 8, wherein each modular tool further comprises a fine adjustment mechanism configured for adjustment of the at least one tool head in the horizontal and vertical directions.
10. A system according to any one of claims 5 to 9, wherein the tool casing is configured to provide radiation shielding to the at least one tool.
11. A system according to any one of claims 5 to 10, further comprising a controller for controlling the at least one modular drive motor wherein the controller controls the at least one modular drive motor using adjustable parameters based on the operation to be performed by the at least one tool head.
12. A system according to any one of claims 5 to 11, wherein the at least one modular drive motor comprises a plurality of modular drive motors configured to cause the at least one tool head to perform at least one of the following operations: grip, cut or rotate.
13. A system according to any one of claims 5 to 12, wherein the tool casing comprises a trap door on a lower side thereof configured for releasing a component removed from the nuclear reactor core.
14. A method for nuclear reactor refurbishment for a nuclear reactor, the nuclear reactor comprising a movement structure provided adjacent a nuclear reactor core, the movement structure comprising a platform configured to move horizontally and vertically in relation to the nuclear reactor core, the method for nuclear reactor refurbishment comprising:
providing a tool carrier to the platform positioned such that the tool carrier is below the platform;
moving the tool carrier via the movement structure to position the tool carrier relative to a fuel channel for refurbishment;
performing fine adjustments to the vertical and horizontal position of the tool carrier to position a tool of the tool carrier relative to the fuel channel;
extending a tool head from the tool towards the fuel channel by operating a modular drive motor of the modular tool;
performing an operation related to nuclear reactor refurbishment on the fuel channel by the tool and removing a component of the fuel channel;
moving the tool carrier via the movement structure to position the tool carrier in relation to a disposal site that is positioned below the platform; and transferring the component to the disposal site.
providing a tool carrier to the platform positioned such that the tool carrier is below the platform;
moving the tool carrier via the movement structure to position the tool carrier relative to a fuel channel for refurbishment;
performing fine adjustments to the vertical and horizontal position of the tool carrier to position a tool of the tool carrier relative to the fuel channel;
extending a tool head from the tool towards the fuel channel by operating a modular drive motor of the modular tool;
performing an operation related to nuclear reactor refurbishment on the fuel channel by the tool and removing a component of the fuel channel;
moving the tool carrier via the movement structure to position the tool carrier in relation to a disposal site that is positioned below the platform; and transferring the component to the disposal site.
15. A system for nuclear reactor refurbishment for a nuclear reactor, the nuclear reactor comprising a movement structure provided adjacent a nuclear reactor core, the movement structure comprising a platform configured to move horizontally and vertically in relation to the nuclear reactor core, the system for nuclear reactor refurbishment comprising:
a tool carrier configured to be coupled to an underside of the platform and move together with the platform; and at least one tool carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
a tool carrier configured to be coupled to an underside of the platform and move together with the platform; and at least one tool carried by the tool carrier configured to perform an operation related to nuclear reactor refurbishment.
16. A system according to claim 15, wherein the tool carrier further comprises fine adjustment mechanisms configured for adjustment of the at least one tool in the horizontal and vertical directions.
17. A system according to any one of claims 15 and 16, wherein the at least one tool comprises a plurality of modular tools, wherein each modular tool comprises:
at least one tool head for performing the operation related to nuclear reactor refurbishment;
at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
at least one tool head for performing the operation related to nuclear reactor refurbishment;
at least one modular drive motor for operating the at least one tool head toward and away from the nuclear reactor core and actuate the at least one tool head; and a tool casing for supporting the at least one tool head and the drive motor.
18. A system according to claims 17, further comprising a controller for controlling the at least one modular drive motor wherein the controller controls the at least one modular drive motor using adjustable parameters based on the operation to be performed by the at least one tool head.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562100272P | 2015-01-06 | 2015-01-06 | |
| US62/100,272 | 2015-01-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2916867A1 true CA2916867A1 (en) | 2016-07-06 |
| CA2916867C CA2916867C (en) | 2022-12-13 |
Family
ID=56329587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2916867A Active CA2916867C (en) | 2015-01-06 | 2016-01-06 | System and method for nuclear reactor refurbishment |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2916867C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022204818A1 (en) * | 2021-03-31 | 2022-10-06 | Ats Automation Tooling Systems Inc. | System and method for automated calandria tube installation |
| WO2023164783A1 (en) * | 2022-03-04 | 2023-09-07 | Ats Automation Tooling Systems Inc. | Systems and method for combined removal of a calandria tube and a pressure tube |
| WO2024050631A1 (en) * | 2022-09-07 | 2024-03-14 | Ats Corporation | Tools and methods for segmenting a calandria tube sheet |
-
2016
- 2016-01-06 CA CA2916867A patent/CA2916867C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022204818A1 (en) * | 2021-03-31 | 2022-10-06 | Ats Automation Tooling Systems Inc. | System and method for automated calandria tube installation |
| WO2023164783A1 (en) * | 2022-03-04 | 2023-09-07 | Ats Automation Tooling Systems Inc. | Systems and method for combined removal of a calandria tube and a pressure tube |
| WO2024050631A1 (en) * | 2022-09-07 | 2024-03-14 | Ats Corporation | Tools and methods for segmenting a calandria tube sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2916867C (en) | 2022-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2916867C (en) | System and method for nuclear reactor refurbishment | |
| US20180257183A1 (en) | Apparatus and method for baffle bolt repair | |
| EP3790024A1 (en) | Remote dismantling system for nuclear power plant and nuclear power plant having same | |
| KR101534675B1 (en) | Remote dismantling robotic system for decommissioning nuclear reactor pressure vessel | |
| US20210046569A1 (en) | Portable robotic welder for nuclear waste handling | |
| US5787137A (en) | Methods and apparatus for performing repairs and inspections in a reactor pressure vessel of a nuclear reactor | |
| US4724607A (en) | Apparatus for rebuilding nuclear fuel assemblies | |
| EP0276528A1 (en) | System and method for consolidating spent fuel rods | |
| JP2008164599A (en) | Handoff method and assembly for refueling nuclear reactor | |
| CA2766459C (en) | Calandria tube, pressure tube, and annulus spacers removal apparatus and method for nuclear reactor retubing | |
| WO2023159299A9 (en) | Systems, tools and methods for disassembling and segmenting a calandria nuclear reactor | |
| JP6338446B2 (en) | Fuel debris retrieval device and fuel debris retrieval method | |
| EP3323129B1 (en) | Automated work platform assembly | |
| CA2766472C (en) | Calandria tube insert removal for reactor retubing | |
| KR101206789B1 (en) | Pipe cutting device for frame of spent nuclear fuel assembly | |
| KR102296229B1 (en) | Boring apparatus for repairing reactor lower head | |
| US5203244A (en) | Device for cutting up a component of a nuclear reactor | |
| JP2015028495A (en) | Method for carrying out nuclear fuel material in atomic power plant | |
| RU128940U1 (en) | COMPLEX FOR GRINDING RADIOACTIVE LONG-DIMENSIONAL ELEMENTS AND LAYING THEIR FRAGMENTS IN CONTAINERS | |
| JPH08233972A (en) | Method for replacing nuclear reactor internal constitution | |
| KR102643938B1 (en) | Nuclear fuel assembly dismantling system and dismantling method | |
| KR102296221B1 (en) | Machining apparatus for repairing pad of reactor lower head | |
| JP6446370B2 (en) | System and method for disposing of one or more radioactive parts from a nuclear power plant reactor | |
| JP6793212B2 (en) | How to carry out nuclear fuel material in a nuclear plant | |
| US4730388A (en) | Replacement of split-pin assemblies in nuclear reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20200515 |
|
| EEER | Examination request |
Effective date: 20200515 |
|
| EEER | Examination request |
Effective date: 20200515 |
|
| EEER | Examination request |
Effective date: 20200515 |
|
| EEER | Examination request |
Effective date: 20200515 |