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CN-122007358-A - Metal nuclear fuel continuous casting molding system

CN122007358ACN 122007358 ACN122007358 ACN 122007358ACN-122007358-A

Abstract

The embodiment of the application relates to the field of fuel manufacturing of nuclear reactors, in particular to a metal nuclear fuel continuous casting molding system which comprises a raw material accommodating part, a raw material conveying device, a smelting crystallization device and a traction shearing discharging device. The smelting and crystallizing device is arranged to smelt the solid metal raw materials in the raw material accommodating part in a sealed environment so as to melt and crystallize the solid metal raw materials to form rod-shaped metal. According to the continuous casting molding system provided by the application, the traction shearing discharging device is arranged to drag the rod-shaped metal, and the raw material conveying device is matched with the smelting crystallization device, so that new solid metal raw materials can be added into the raw material accommodating part in the smelting crystallization device or sampled from the raw material accommodating part by using the raw material conveying device under the condition of keeping the sealing environment of the smelting crystallization device, and the nuclear fuel can be continuously cast.

Inventors

  • JIANG CHENGYUAN
  • LIU ZHAOYANG
  • WANG YIXIN
  • LI YAPING
  • WANG DONGHENG

Assignees

  • 中国原子能科学研究院
  • 中国核能电力股份有限公司
  • 秦山核电有限公司
  • 核电秦山联营有限公司
  • 秦山第三核电有限公司
  • 江苏核电有限公司
  • 福建福清核电有限公司
  • 三门核电有限公司

Dates

Publication Date
20260512
Application Date
20260310

Claims (18)

  1. 1. A metal nuclear fuel continuous casting molding system, comprising: A raw material accommodating member for accommodating a solid metal raw material; The smelting and crystallizing device is arranged to smelt the solid metal raw materials in the raw material accommodating part in a sealed environment so as to enable the solid metal raw materials to be melted to form liquid metal; the raw material container is arranged so that molten liquid metal can flow out of the raw material container; the smelting and crystallizing device is further arranged to crystallize the liquid metal flowing from the raw material container into a rod-shaped metal; The traction shearing discharging device is arranged to be capable of carrying out traction on the rod-shaped metal formed by the smelting and crystallizing device so that the smelting and crystallizing device can continuously form the rod-shaped metal, and the pulled rod-shaped metal is sheared and conveyed to the outside; The feed material conveying device and the smelting and crystallizing device are also arranged to cooperate with each other so that new solid metal feed material can be added to or sampled from the feed material holder in the smelting and crystallizing device by means of the feed material conveying device while maintaining a sealed environment of the smelting and crystallizing device.
  2. 2. The system of claim 1, wherein the feedstock delivery device comprises a transport member, a delivery seal housing, a grasping movement seal member; the feeding cavity of the smelting crystallization device is positioned in the conveying sealing shell; The grabbing moving sealing piece is arranged in the conveying sealing shell, and the grabbing moving sealing piece is arranged to grab the raw material containing piece and carry the raw material containing piece to move; The transport member is configured to convey the raw material container to a gripping position so that the raw material container can be gripped by the gripping moving seal; The grabbing moving sealing member is further arranged to move the raw material accommodating member into the conveying sealing shell, convey the raw material accommodating member into the smelting crystallization device through the feeding cavity in the conveying sealing shell, and mutually cooperate with the smelting crystallization device so that new solid metal raw materials can be added into the raw material accommodating member in the smelting crystallization device or sampling can be carried out from the raw material accommodating member by utilizing the grabbing moving sealing member under the condition that the sealing environment of the smelting crystallization device is maintained.
  3. 3. The system of claim 2, wherein the grasping and moving seal member comprises a grasping member, a moving rail, a horizontal moving member movably disposed along the moving rail, a horizontal moving driving member movably disposed along the moving rail for driving the horizontal moving member, a lifting assembly disposed on the horizontal moving member, and a seal cartridge; The grabbing piece is arranged on the radial inner side of the sealing barrel piece; The horizontal moving piece is arranged to drive the grabbing piece and the sealing cylinder piece to move from the grabbing position to a position aligned with the feeding cavity; The sealing cylinder can be lifted relative to the horizontal moving member so as to seal the feeding cavity when aligned with the feeding cavity; the lifting component can drive the grabbing piece to lift, so that the grabbing piece can stretch out of the conveying sealing shell to grab the raw material containing piece located at the grabbing position and enable the grabbing raw material containing piece to move into the conveying sealing shell, and the grabbing piece can enter the feeding cavity when the sealing barrel piece seals the feeding cavity.
  4. 4. The system of claim 1, wherein the smelting crystallization apparatus comprises a smelting crystallization housing, a feed member, a smelting crystallization assembly, The smelting crystallization shell is arranged to form a sealed smelting crystallization chamber and a feed port communicated with the smelting crystallization chamber; The feeding piece forms a feeding cavity and is arranged to be capable of closing or opening the feeding hole, the grabbing moving sealing piece of the raw material conveying device can seal the feeding cavity, and the feeding piece is further arranged to vacuumize or aerate the feeding cavity so that the atmosphere of the feeding cavity is the same as that of the smelting crystallization cavity; The smelting crystallization assembly is configured to form a locating engagement channel to receive and locate the feedstock containing member, the grasping and moving seal is configured to move the feedstock containing member through the feed port into the locating engagement channel, The smelting and crystallizing assembly is further configured to melt solid metal feedstock in the feedstock containment vessel to form liquid metal and crystallize the liquid metal to form the rod-shaped metal.
  5. 5. The system of claim 4, wherein the smelting crystallization assembly comprises a smelting crystallization mating piece, a heating piece, and a crystallization assembly; the smelting crystallization matching piece forms a positioning matching channel for positioning matching with the raw material containing piece and a heating cavity positioned at the radial outer side of the positioning matching channel, wherein the heating piece is arranged in the heating cavity and is used for heating materials in the raw material containing piece to form the liquid metal; The crystallization component forms a crystallization channel, and the crystallization component is arranged in the positioning matching channel and can be matched with the raw material accommodating part, so that the liquid metal flowing out of the raw material accommodating part can flow into the crystallization channel to be crystallized to form the rod-shaped metal.
  6. 6. The system of claim 5, wherein the crystallization assembly comprises a cooling member and a crystallization mating member removably mated with the cooling member; the crystallization mating member forms the crystallization channel; the cooling piece is arranged to cool the crystallization matching piece so that the liquid metal can be crystallized in the crystallization channel to form the rod-shaped metal.
  7. 7. The system of claim 6, wherein the system further comprises a controller configured to control the controller, The cooling piece forms a variable-temperature cooling cavity and a constant-temperature cooling cavity which are not communicated with each other, The temperature-adjustable first cooling liquid circularly flows in the variable-temperature cooling cavity so as to adjust the cooling rate of the liquid metal; The constant temperature cooling cavity is arranged below the variable temperature cooling cavity, and second cooling liquid with constant temperature circularly flows in the constant temperature cooling cavity so as to prevent the rod-shaped metal from being subjected to secondary stress caused by temperature change.
  8. 8. The system of claim 1, wherein the system further comprises a controller configured to control the controller, The raw material containing piece comprises a containing body, a containing grabbing matching piece and a containing positioning matching piece, The accommodating body forms a metal accommodating cavity for accommodating the solid metal raw material; the accommodating grabbing fitting is used for being matched with the grabbing fitting of the raw material conveying device so that the accommodating body can be grabbed; The accommodating and positioning matching piece is used for matching with a crystallization component of the smelting and crystallizing device so that liquid formed by melting in the metal accommodating cavity can flow into the crystallization component, and matching with the smelting and crystallizing matching piece of the smelting and crystallizing device so as to provide positioning and supporting for the accommodating body by the smelting and crystallizing matching piece.
  9. 9. The system of claim 1, wherein the system further comprises a controller configured to control the controller, The traction shearing discharging device comprises a guide piece, a traction component, a shearing component and a discharging component; The drawing assembly is arranged to draw the guide member to move downwards, the guide member is arranged to enable liquid metal in the metal accommodating cavity of the raw material accommodating member to move downwards along with the guide member to form a bar-shaped metal, and the drawing assembly is also arranged to draw the bar-shaped metal to continuously move downwards so as to cast the liquid metal into the bar-shaped metal continuously, and the straightness of the formed bar-shaped metal is corrected; the shearing assembly is arranged to shear the rod-shaped metal to a preset length; the discharging assembly is arranged to receive the sheared bar-shaped metal and to convey the bar-shaped metal to the outside.
  10. 10. The system of claim 9, wherein the system further comprises a controller configured to control the controller, The traction assembly comprises a traction driving piece, a compaction degree adjusting piece, a plurality of traction wheel sets and correction wheel sets; The plurality of traction wheel sets and the correction wheel sets are arranged at intervals along the moving direction of the bar-shaped metal, and the bar-shaped metal is positioned between each wheel set; the compaction degree adjusting piece is used for adjusting the compaction degree of each traction wheel group on the rod-shaped metal; the traction driving piece is arranged to drive the traction wheel set to rotate so as to provide power for traction of the rod-shaped metal; the correction wheel group is arranged to correct the straightness of the formed bar-shaped metal.
  11. 11. The system of claim 9, wherein the system further comprises a controller configured to control the controller, The discharging assembly comprises a receiving shell, a bar receiving holding member, a bar collecting member, a discharging conveying rail and an isolation shell; The receiving shell forms a sealed receiving cavity which is communicated with a smelting crystallization cavity of the smelting crystallization device so that the rod-shaped metal can enter the receiving cavity; the bar receiving and placing member is arranged to receive the sheared bar-shaped metal and place the bar-shaped metal on the bar collecting member; The isolation housing forms an isolation chamber that is operably communicable or isolated from the receiving chamber, and the outfeed conveyor track is for conveying the bar collection from the receiving chamber to the isolation chamber, and thereafter conveying the bar collection outside the isolation chamber while the isolation chamber is isolated from the receiving chamber.
  12. 12. The system of claim 11, wherein the system further comprises a controller configured to control the controller, The bar receiving and placing member comprises a grabbing part, a rotating part and a moving part, wherein the grabbing part is used for grabbing or releasing the bar-shaped metal; The rotary part is used for driving the grabbing part to overturn so that the rod-shaped metal is in a first horizontal direction parallel to the extending direction of the discharging conveying track; The moving part is arranged to drive the rotating part and the grabbing part to move along a first horizontal direction, a second horizontal direction and a vertical direction, and the second horizontal direction is perpendicular to the first horizontal direction, so that the grabbing part can place the rod-shaped metal in each containing groove of the bar collecting piece.
  13. 13. A metal nuclear fuel continuous casting molding system, characterized by comprising: A raw material accommodating member for accommodating a solid metal raw material; A raw material conveying device for conveying the raw material accommodating member to the continuous casting device in a sealed environment; The continuous casting device is arranged to be capable of smelting and crystallizing the solid metal raw material in the raw material container in a sealed environment to continuously form a plurality of rod-shaped metals; The feed material delivery device and the continuous casting device are further configured to cooperate with each other to maintain a sealed environment of the continuous casting device when new solid metal feed material is added to the feed material holder positioned in the continuous casting device by the feed material delivery device; A discharge assembly configured to convey the rod-shaped metal outwardly; the first operation shell forms a sealed first operation space to provide a sealed environment for disassembling, assembling and overhauling the raw material conveying device; and the second operation shell forms a sealed second operation space to provide a sealed environment for disassembling, assembling and overhauling the continuous casting device.
  14. 14. The system of claim 13, wherein the system further comprises a controller configured to control the controller, The raw material conveying device comprises a conveying piece, a conveying sealing shell and a grabbing moving sealing piece; the feeding cavity of the continuous casting device is positioned inside the conveying sealing shell; The grabbing moving sealing piece is arranged in the conveying sealing shell, and the grabbing moving sealing piece is arranged to grab the raw material containing piece and carry the raw material containing piece to move; The transport member is configured to convey the raw material container to a gripping position so that the raw material container can be gripped by the gripping moving seal; The grabbing moving seal is further arranged to move the raw material container into the conveying seal housing, and to feed the raw material container into the continuous casting device through the feed cavity in the conveying seal housing, and to cooperate with the continuous casting device to maintain a sealed environment of the continuous casting device when new solid metal raw material is added to the raw material container located in the continuous casting device by the grabbing moving seal; the conveying sealing shell forms a first overhaul port which can be opened or closed, and the first operation space is communicated with the conveying sealing shell through the first overhaul port, so that the raw material conveying device is convenient to disassemble, assemble and overhaul in a sealing environment.
  15. 15. The system of claim 13, wherein the continuous casting apparatus comprises a casting housing, a continuous casting assembly, a spacer, and a casting movement; The casting shell forms a smelting crystallization chamber for casting the rod-shaped metal, an overhaul matching chamber for facilitating overhaul of the continuous casting assembly and a second overhaul port for communicating the overhaul matching chamber and the second operation space; The continuous casting assembly is disposed on the spacer; the casting moving piece is arranged to drive the isolating piece to move towards the direction of the smelting crystallization chamber so that the main body of the continuous casting assembly is positioned in the smelting crystallization chamber and the smelting crystallization chamber is closed, or drive the isolating piece to move towards the direction of the overhaul matching chamber so that the continuous casting assembly can be overhauled through the second overhaul hole.
  16. 16. The system of claim 15, wherein the cast housing comprises a smelting crystallization housing, a service mating housing, The smelting crystallization shell forms the smelting crystallization chamber with one side open; the overhaul matching shell forms an overhaul matching chamber with one side open, and the open side of the smelting crystallization shell is in butt joint with the open side of the overhaul matching shell.
  17. 17. The system of claim 16, wherein the smelting crystallization enclosure comprises a smelting crystallization enclosure body defining a top opening and a smelting crystallization enclosure cover removably coupled to the smelting crystallization enclosure body to close or open the top opening; The feed seal housing top of the feed conveyor defines an outlet and a cover for closing or opening the outlet, the outlet being aligned with the top opening to remove the body of the continuous casting assembly from the top opening and the outlet.
  18. 18. The system of claim 17, wherein the continuous casting assembly comprises: a smelting crystallization assembly detachably connected to the separator at a side facing the smelting crystallization chamber; A cooling liquid pipeline for providing cooling liquid for the smelting and crystallizing component and an electrode for providing current penetrate through the separator to be connected with the smelting and crystallizing component in a quick-dismantling way; A pulling member capable of pulling the rod-shaped metal so that the rod-shaped metal continuously moves downward from the smelting and crystallizing module, the pulling member being detachably connected to the partition member at a side facing the smelting and crystallizing chamber; The traction driving piece is used for driving the traction piece to traction the rod-shaped metal, and the traction driving piece is detachably connected with the isolating piece at one side of the traction driving piece, which is opposite to the smelting crystallization chamber; the compression degree adjusting piece is used for adjusting the compression degree of the traction piece on the rod-shaped metal, and the compression degree adjusting piece is detachably connected with the isolating piece at one side of the traction piece, which is opposite to the smelting crystallization chamber; a shearing member detachably connected to the partition member at a side facing the smelting crystallization chamber; the shearing driving piece is used for driving the shearing piece to shear the rod-shaped metal, and the shearing driving piece is detachably connected with the isolating piece at one side opposite to the smelting crystallization chamber; Wherein the smelting and crystallizing assembly, the pulling member, and the shearing member form a body of the continuous casting assembly.

Description

Metal nuclear fuel continuous casting molding system Technical Field The embodiment of the application relates to the field of fuel manufacturing of nuclear reactors, in particular to a metal nuclear fuel continuous casting molding system. Background The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. The metal nuclear fuel has the characteristics of high fuel consumption and high safety, and is also the nuclear fuel type with the most development potential in the sodium-cooled fast reactor. The metal fuel can be prepared by adopting a casting molding process, namely, materials are melted into metal liquid at high temperature and then solidified and molded. Currently, there are limitations to the process of casting metal fuels. Disclosure of Invention The following presents a simplified summary of the application in order to provide a basic understanding of some aspects of the application. It should be understood that this summary is not an exhaustive overview of the application. It is not intended to identify key or critical elements of the application or to delineate the scope of the application. Its purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later. In a first aspect, embodiments of the present application provide a metal nuclear fuel continuous casting forming system comprising a feedstock containment for containing solid metal feedstock, feedstock delivery means for delivering the feedstock containment to the smelting and crystallisation means in a sealed environment, the smelting and crystallisation means being arranged to smelt the solid metal feedstock in the feedstock containment in a sealed environment to form liquid metal, the feedstock containment being arranged to enable liquid metal formed by smelting to flow from the feedstock containment, the smelting and crystallisation means being further arranged to crystallise the liquid metal flowing from the feedstock containment to form rod-shaped metal, traction shear discharge means being arranged to drag the rod-shaped metal formed by the smelting and crystallisation means to enable the smelting and crystallisation means to continue to form rod-shaped metal and to shear and deliver the rod-shaped metal drawn to the outside, the feedstock delivery means and the smelting and crystallisation means being further arranged to co-operate to enable the use of the feedstock delivery means to add new solid metal feedstock to the feedstock containment in the smelting and crystallisation means or to sample the feedstock containment in the smelting and crystallisation means while maintaining the sealed environment of the smelting and crystallisation means. According to the embodiment of the application, the raw material containing piece is arranged to contain solid metal raw materials, and the liquid metal formed by melting in the raw material containing piece can flow out of the raw material containing piece, so that the raw material containing piece and the solid metal raw materials can be directly conveyed to the smelting crystallization device by using the raw material conveying device in a sealed environment, and smelting is performed in the sealed environment, and the radionuclide leakage is reduced. According to the continuous casting molding system provided by the application, the traction shearing discharging device is arranged to lead the rod-shaped metal to be continuously discharged, and the raw material conveying device is matched with the smelting crystallization device, so that in the nuclear fuel casting process, a new solid metal raw material is added into the raw material accommodating part positioned in the smelting crystallization device and sampled from the raw material accommodating part while the sealing environment of the smelting crystallization device is maintained, and the continuous casting of the nuclear fuel is realized. Since each component can be reused in the process of continuously casting the nuclear fuel, the generation of radioactive waste can be reduced. In a second aspect, embodiments of the present application provide a metal nuclear fuel continuous casting molding system comprising a feedstock containing member for containing solid metal feedstock, a feedstock transporting device for transporting the feedstock containing member to the continuous casting device in a sealed environment, and a continuous casting device configured to melt and crystallize the solid metal feedstock in the feedstock containing member in the sealed environment to continuously form a plurality of rod-shaped metals, the feedstock transporting device and the continuous casting device further being configured to cooperate with each other to maintain the sealed environment of the continuous casting device when new solid metal feedstock is added to the feedstock containing member located i