Target piece loading and unloading device for high temperature gas cooled reactor and reactor core system

Abstract

This invention relates to a target loading and unloading device and core system for a high-temperature gas-cooled reactor (HTGR). The HTGR target loading and unloading device includes a support frame, a hub drive assembly, a traction rope, and a conduit. The hub drive assembly is mounted on the support frame and has a rotating end. The traction rope is mounted on the rotating end. The conduit has open ends, and the traction rope passes through one end of the conduit. The conduit is used to store target components. This HTGR target loading and unloading device can be remotely controlled by rotating the rotating section in both directions to lower and rewind the traction rope, thereby lowering and raising the target component, achieving target loading and unloading. It has a high degree of automation, reducing personnel involvement and labor intensity.

Description

Technical Field

[0001] This invention relates to the field of isotope production in high-temperature gas-cooled reactor nuclear power plants, specifically to a target loading and unloading device and core system for high-temperature gas-cooled reactors. Background Technology

[0002] In isotope production at high-temperature gas-cooled reactor nuclear power plants, there is a step of loading the target into the isotope production channel next to the reactor. After the target has been irradiated with neutrons in the reactor to meet the requirements, it is then lifted out of the isotope production channel and placed in a shielded container. In related technologies, the loading and unloading process of the target suffers from low automation and high human involvement. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention provide a target loading and unloading device for a high-temperature gas-cooled reactor, comprising a support, a hub drive assembly, a traction rope, and a conduit. The hub drive assembly is mounted on the support and has a rotating end. The traction rope is mounted on the rotating end. The conduit has open ends, and the traction rope passes through one end of the conduit. The conduit is used to store the target.

[0005] The target loading and unloading device for high-temperature gas-cooled reactors according to this invention can be remotely controlled by controlling the forward and reverse rotation of the rotating section to drive the traction rope to be lowered and wound up, thereby driving the target to descend and be lifted, realizing the loading and unloading of the target. It has a high degree of automation and can reduce the degree of human involvement and labor intensity.

[0006] In some embodiments, the hub drive assembly includes a drive motor, a rotating shaft, and a sleeve. The sleeve is mounted on the bracket, and the rotating shaft is rotatably mounted inside the sleeve. A portion of the circumferential surface of the rotating shaft forms the rotating end and is spaced apart from the inner wall surface of the sleeve. The sleeve has a threading hole, and the traction rope is located inside the threading hole. The output end of the drive motor is drively connected to the rotating shaft.

[0007] In some embodiments, the hub drive assembly includes a magnetic synchronizer, one side of which is connected to the output shaft of the drive motor, and the other side of which is detachably connected to the rotating shaft.

[0008] In some embodiments, the hub drive assembly further includes a connecting pipe, one end of which is disposed on the through hole, and the other end of which is connected to one end of the conduit.

[0009] In some embodiments, the drive motor is a stepper motor.

[0010] In some embodiments, the target loading and unloading device for a high-temperature gas-cooled reactor further includes a tank, and the conduit is disposed within the tank.

[0011] In some embodiments, the conduit is a spiral tube.

[0012] In some embodiments, the other end of the conduit extends out of the tank.

[0013] In some embodiments, the traction rope is a steel wire rope.

[0014] The reactor core system of this invention includes the target loading and unloading device for high-temperature gas-cooled reactors. Attached Figure Description

[0015] Figure 1 This is one of the structural schematic diagrams of the target loading and unloading device for a high-temperature gas-cooled reactor according to an embodiment of the present invention; Figure 2 This is the second schematic diagram of the target loading and unloading device for a high-temperature gas-cooled reactor according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the hub drive assembly according to an embodiment of the present invention; Figure label: 100. Loading and unloading device; 1. Hub drive assembly; 11. Drive motor; 12. Shaft; 13. Sleeve; 14. Magnetic synchronizer; 15. Connecting pipe; 2. Conduit; 3. Tank. Detailed Implementation

[0016] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0017] The target loading and unloading device 100 and the core system for a high-temperature gas-cooled reactor according to embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] The reactor core system of this invention includes a target loading and unloading device 100 for a high-temperature gas-cooled reactor.

[0019] like Figures 1 to 3 As shown, the target loading and unloading device 100 for high-temperature gas-cooled reactors according to an embodiment of the present invention includes a support (not shown in the figure), a hub drive assembly 1, a traction rope (not shown in the figure), and a conduit 2. The hub drive assembly 1 is mounted on the support and has a rotating end. The traction rope is mounted on the rotating end. The two ends of the conduit 2 are open. The traction rope passes through one end of the conduit 2 and is used to store the target.

[0020] The target loading and unloading device 100 for high-temperature gas-cooled reactors in this embodiment of the invention performs the recovery of core targets and the loading of new targets into the core. After the target loading and unloading device 100 for high-temperature gas-cooled reactors in this embodiment of the invention is installed in place, the operator can remotely control it manually or use a preset program to automatically control it using the control system to control the start and forward and reverse rotation of the hub drive assembly 1.

[0021] When a new target is loaded, the rotating end of the control hub drive assembly 1 rotates clockwise, releasing the traction rope downwards. The target falls into the reactor core under gravity. After the target has been irradiated, the rotating end of the control hub drive assembly 1 rotates counterclockwise, winding up the traction rope. The target enters the duct 2 under the pull of the traction rope and is temporarily stored inside the duct 2. Then, in coordination with other pipeline control systems in the high-temperature gas-cooled reactor system, the target is moved into the shielding container. The connection between the traction rope and the target is then disconnected, and a new target is installed at the lower end of the traction rope.

[0022] Therefore, the target loading and unloading device 100 for high-temperature gas-cooled reactors in this embodiment of the invention can be remotely controlled by controlling the forward and reverse rotation of the rotating section to drive the traction rope to be lowered and wound up, thereby driving the target to descend and be lifted, realizing the loading and unloading of the target. It has a high degree of automation and can reduce the degree of personnel involvement and labor intensity.

[0023] In some embodiments, the hub drive assembly 1 includes a drive motor 11, a rotating shaft 12, and a sleeve 13. The sleeve 13 is mounted on a bracket, and the rotating shaft 12 is rotatably disposed within the sleeve 13. A portion of the circumferential surface of the rotating shaft 12 forms a rotating end and is spaced apart from the inner wall surface of the sleeve 13. The sleeve 13 is provided with a threading hole, and the traction rope is located within the threading hole. The output end of the drive motor 11 is connected to the rotating shaft 12 for transmission. The drive motor 11 drives the rotating shaft 12 to rotate in both directions, and the rotating shaft 12 lowers or winds up the traction rope.

[0024] In some embodiments, the hub drive assembly 1 includes a magnetic synchronizer 14. One side of the magnetic synchronizer 14 is connected to the output shaft of the drive motor 11, and the other side of the magnetic synchronizer 14 is detachably connected to the rotating shaft 12. The magnetic synchronizer 14 is used to drive the output shaft of the drive motor 11 and the rotating shaft 12, allowing the drive motor 11 and the rotating shaft 12 to be disengaged. This ensures that maintenance of the drive motor 11 does not affect the rotating shaft 12 or the integrity of the primary circuit pressure boundary.

[0025] In some embodiments, the hub drive assembly 1 further includes a connecting pipe 15, one end of which is disposed on a wire hole, and the other end of which is connected to one end of the conduit 2. The lower end of the conduit 2 is the reactor core, and the sleeve 13, the connecting pipe 15, and the conduit 2 form a closed space for the traction rope, which helps to improve the sealing performance of the reactor core system.

[0026] Furthermore, the drive motor 11 is a stepper motor. This allows for precise control of the rotation angle of the shaft 12 and the extension / retraction stroke of the traction rope.

[0027] In some embodiments, the target loading and unloading device 100 for high-temperature gas-cooled reactors further includes a tank 3, with a conduit 2 disposed within the tank 3. The tank 3 provides stable support for the conduit 2, thereby ensuring the stability and reliability of the target moving within the conduit 2 when the traction rope drives it.

[0028] In some embodiments, the conduit 2 is a spiral tube. The spiral tube has a long extension length, which can provide a longer space for the movement and storage of the target, thereby allowing the conduit 2 to have a larger extension length while keeping its height constant. In other words, while meeting the required length of the target, the space occupied by the conduit 2 can be effectively saved, thereby saving the on-site layout space of the device.

[0029] In some embodiments, the other end of the conduit 2 extends out of the tank 3.

[0030] In some embodiments, the traction rope is a steel wire rope. Steel wire ropes have high strength, light weight, and high load-bearing efficiency.

[0031] The loading and unloading device 100 of this invention is applied to the high-temperature gas-cooled reactor core system, cooperating with other equipment in the system and the system's operation and control process. Specifically, through a preset program, the target unloading device, the core system's vacuum system, isolation valves, double-stage reversing devices, triple-stage reversing devices, and other equipment are automatically controlled by the control system or remotely manually controlled by the operator to realize the loading of new targets into the core and the unloading of irradiated targets into the shielding container. The process is as follows.

[0032] New target loading procedure: (1) After all components are ready, the operator switches the two-way reversing device to the pipeline where the shielding tank is located, and at the same time starts the hub drive assembly to release the wire rope to the vicinity of the shielding tank. The operator connects the new target to the wire rope, and then drives the hub drive assembly 1 in the opposite direction. The new target is retracted to the spiral coil for storage under the drive of the hub drive assembly 1. (2) Close the isolation valve between the two-way switching device and the shielding tank, and open the isolation valve between the two-way switching device and the three-way switching device and the isolation valve of the extraction process section in sequence. Start the vacuum system to vacuum the online irradiation device. After the vacuum reaches 500Pa, close the isolation valve of the extraction process section. (3) Open the isolation valve of the helium filling process section, fill the online irradiation device with helium to 7.0 MPa, and then close the isolation valve of the helium filling process section; (4) Switch the two-way switching device to the pipeline where the neutron source pipeline is located, switch the three-way switching device to the target neutron source pipeline, and then open the two safety isolation valves of the target neutron source pipeline; (5) Start the hub drive assembly to load the new target into the core. After the new target reaches the limit, the hub drive assembly 1 stops rotating. (6) The external interlocking device of the neutron source pipeline is put into operation, and the wire rope is disengaged from the target; (7) The hub drive assembly 1 rotates in reverse to retract the wire rope to its initial position; (8) Close the neutron source pipeline isolation valve, open the extraction process section isolation valve, evacuate the online irradiation device to atmospheric pressure, and close the extraction process section isolation valve. (9) Close the isolation valve between the two-way switching device and the three-way switching device, and switch the online irradiation device to standby mode.

[0033] Irradiation target removal process: (1) Open the isolation valve of the extraction process section, start the vacuum system to evacuate the online irradiation device, and close the isolation valve of the extraction process section after the vacuum degree reaches 500Pa. (2) Open the isolation valve of the helium filling process section, fill the online irradiation device with helium to 7.0 MPa, and then close the isolation valve of the helium filling process section; (3) Switch the two-way switching device to the pipeline where the neutron source pipeline is located, switch the three-way switching device to the target neutron source pipeline, and then open the two safety isolation valves of the target neutron source pipeline; (4) Start the hub drive assembly to release the wire rope to the target limiter, start the locking device to make the wire rope and the ornament interlock; (5) Reverse drive the hub drive assembly, recover the target to the spiral coil, and close the neutron source channel isolation valve; (6) Open the isolation valve of the extraction process section, start the vacuum system to evacuate the online irradiation device, and close the isolation valve of the extraction process section after the vacuum degree reaches 500Pa. (7) Open the isolation valve between the shielding tank and the dual-phase switching device to switch the online irradiation device to air atmosphere; (8) Switch the dual-connector to the process pipeline where the shielded tank is located and connect it to the shielded tank; (9) Activate the hub drive assembly to release the target to the top of the shielding tank along the line of gravity; (10) The target disassembly robot disassembles the target into sections and stores them in a shielded container; (11) Reinstall the new target into the reactor core according to the procedure for installing the new target.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A target loading and unloading device (100) for a high-temperature gas-cooled reactor, characterized in that, The device includes a support, a hub drive assembly (1), a traction rope, and a conduit (2). The hub drive assembly (1) is mounted on the support and has a rotating end. The traction rope is mounted on the rotating end. The conduit (2) has open ends and the traction rope passes through one end of the conduit (2). The conduit (2) is used to store the target.

2. The target loading and unloading device (100) for high-temperature gas-cooled reactors according to claim 1, characterized in that, The hub drive assembly (1) includes a drive motor (11), a rotating shaft (12), and a sleeve (13). The sleeve (13) is mounted on the bracket. The rotating shaft (12) is rotatably mounted inside the sleeve (13). A portion of the circumferential surface of the rotating shaft (12) forms the rotating end and is spaced apart from the inner wall of the sleeve (13). The sleeve (13) is provided with a threading hole. The traction rope is located inside the threading hole. The output end of the drive motor (11) is connected to the rotating shaft (12) for transmission.

3. The target loading and unloading device (100) for high-temperature gas-cooled reactors according to claim 2, characterized in that, The hub drive assembly (1) includes a magnetic synchronizer (14), one side of which is connected to the output shaft of the drive motor (11), and the other side of which is detachably connected to the rotating shaft (12).

4. The target loading and unloading device (100) for high-temperature gas-cooled reactors according to claim 2, characterized in that, The hub drive assembly (1) further includes a connecting pipe (15), one end of which is disposed on the wire hole, and the other end of which is connected to one end of the conduit (2).

5. The target loading and unloading device (100) for high-temperature gas-cooled reactors according to claim 2, characterized in that, The drive motor (11) is a stepper motor.

6. The target loading and unloading device (100) for a high-temperature gas-cooled reactor according to claim 2, characterized in that, It further includes a tank (3), and the conduit (2) is disposed inside the tank (3).

7. The target loading and unloading device (100) for a high-temperature gas-cooled reactor according to claim 6, characterized in that, The other end of the conduit (2) extends out of the tank (3).

8. The target loading and unloading device (100) for high-temperature gas-cooled reactors according to claim 1, characterized in that, The conduit (2) is a spiral tube.

9. The target loading and unloading device (100) for a high-temperature gas-cooled reactor according to claim 1, characterized in that, The traction rope is a steel wire rope.

10. A reactor core system, characterized in that, Includes the target loading and unloading device (100) for high-temperature gas-cooled reactors as described in any one of claims 1 to 9.

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