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公开(公告)号：US12022600B2
公开(公告)日：2024-06-25
申请号：US17761500
申请日：2019-10-02
发明人： Hyun-Je Cho , Cheon-Woo Kim
IPC分类号： H05H1/28
CPC分类号： H05H1/28
摘要： A plasma torch has a torch body provided with a plurality of stacked torch body segments disposed between a rear electrode unit and a front electrode unit. The torch body forms a circular channel through which gas flows in an axial direction. Each torch body segment has a circular disc shape in which a central circular through-hole is formed to form the channel. Each segment includes gas supply ports defining a spiral-shaped flow path along the through hole on a first side of the segment so as to introduce a reactive gas, a cooling flow path, a cooling water supply flow path, a cooling water discharge flow path, a gas supply flow path, a gas branch flow path, a cooling water supply branch flow path, and a cooling water discharge branch flow path.
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公开(公告)号：US20220068515A1
公开(公告)日：2022-03-03
申请号：US17422822
申请日：2020-02-12
发明人： Seok-Ju HWANG , Young Hwan HWANG , Ju-Young YOON , Cheon-Woo Kim
摘要： An exposure prevention device for dismantling a heavy water reactor facility according to an embodiment includes: a shielding film that covers a front surface and a rear surface of a heavy water facility including a calandria and a calandria vault that accommodates the calandria; a plurality of radiation measuring instruments installed in the shielding film; and a motion detector installed in the shielding film.
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公开(公告)号：US12033765B2
公开(公告)日：2024-07-09
申请号：US17438960
申请日：2020-03-13
发明人： Young Hwan Hwang , Seok-Ju Hwang , Mi-Hyun Lee , Cheon-Woo Kim
CPC分类号： G21D1/003 , G08B21/182 , G21C9/04
摘要： A safety cover structure of a nuclear facility is disclosed. The safety cover structure includes: a cover portion rotatably installed on a body protection concrete slab to cover a cavity where a reactor pressure container is located; a driving portion configured to rotate the cover portion relative to the cavity; an opening and closing portion that is installed on the cover portion and is configured to allow materials resulting from cutting and dismantling of the reactor pressure container to move therethrough; a fire extinguishing portion configured to extinguish a fire generated inside the cover portion; a dose sensor installed in the cover portion and configured to measure a radiation dose emitted from the reactor pressure container; and an alarm portion configured to receive a sensing signal from the dose sensor and provide an alarm when the measured radiation dose exceeds a predetermined value.
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公开(公告)号：US11682496B2
公开(公告)日：2023-06-20
申请号：US17256755
申请日：2019-07-03
发明人： Young Hwan Hwang , Mi-Hyun Lee , Seok-Ju Hwang , Cheon-Woo Kim
摘要： An apparatus for treating waste of a nuclear reactor pressure vessel includes: a suction unit inserted into the nuclear reactor pressure vessel through a plurality of through-pipes passing through a lower portion of the nuclear reactor pressure vessel to suck waste inside the nuclear reactor pressure vessel; a waste treatment part connected to the suction unit to treat the waste; and a lower collection part connected to the waste treatment part to be positioned under the nuclear reactor pressure vessel with the suction unit therebetween.
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公开(公告)号：US11495364B2
公开(公告)日：2022-11-08
申请号：US17048326
申请日：2019-04-17
发明人： Seok-Ju Hwang , Ju-Young Yoon , Young Hwan Hwang , Cheon-Woo Kim
IPC分类号： G21D1/00
摘要： A method of decommissioning a nuclear facility, including: exposing the plurality of upper penetration holes by removing the plurality of sandboxes; enlarging an upper space of the cavity by cutting an upper portion of the biological shield concrete that is disposed between the plurality of upper penetration holes and between the plurality of upper penetration holes and the cavity; and separating the nuclear reactor pressure vessel from the biological shield concrete.
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公开(公告)号：US11456084B2
公开(公告)日：2022-09-27
申请号：US17277769
申请日：2019-09-20
发明人： Young Hwan Hwang , Seok-Ju Hwang , Mi-Hyun Lee , Cheon-Woo Kim
摘要： A device for removing shielding balls from calandria of a heavy water reactor is provided. The device includes a head for moving the shielding balls positioned inside of an end shield of the calandria to an outside of the end shield; and a mover for moving the head to the end shield of the calandria. The head includes a head body, an opening former installed on the head body and configured to form an opening in the end shield, and a gate installed on the head body and configured to control an amount of the shielding balls discharged to the outside through the opening.
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公开(公告)号：US11984233B2
公开(公告)日：2024-05-14
申请号：US17259691
申请日：2019-07-03
发明人： Seok-Ju Hwang , Young Hwan Hwang , Hang-Rae Cho , Cheon-Woo Kim
摘要： A method for decommissioning a heavy water reactor facility includes: removing the plurality of guide tubes from a plurality of through-holes; installing a plurality of shielding stoppers in the plurality of through-holes; removing the shielding stopper installed in one through-hole of the plurality of through-holes, and inserting a cutting device into a lower portion of the reactivity mechanism deck through the one through-hole to cut a connection portion between the reactivity mechanism deck and the calandria vault by using the cutting device; and separating the reactivity mechanism deck from the calandria vault.
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公开(公告)号：US11830634B2
公开(公告)日：2023-11-28
申请号：US17437073
申请日：2020-03-05
发明人： Young Hwan Hwang , Seok-Ju Hwang , Ju-Young Yoon , Cheon-Woo Kim
摘要： A method for complex-decommissioning a nuclear facility is disclosed. The method for complex-decommissioning the nuclear facility includes: cutting and expanding an inner wall of the cavity; installing a cutting device that cuts and decommissions the nuclear reactor pressure vessel inside the cavity; fixing the nuclear reactor pressure vessel inside the cavity by using a fixture; and cutting and decommissioning the nuclear reactor pressure vessel fixed inside the cavity by using a cutting device.
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公开(公告)号：US11342087B2
公开(公告)日：2022-05-24
申请号：US17257360
申请日：2019-07-03
发明人： Young Hwan Hwang , Mi-Hyun Lee , Ju-Young Yoon , Cheon-Woo Kim
IPC分类号： G21D1/00
摘要： A nuclear reactor decommissioning system according to an embodiment includes a cutting device to cut a reactor, a lifting device inserted inside the reactor to lift the reactor, and a shielding device that is positioned between the reactor and the lifting device and blocks radioactive dust generated by the cutting device from spreading.
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10.发明授权公开(公告)号：US11032900B2
公开(公告)日：2021-06-08
申请号：US15559588
申请日：2015-09-17
发明人： Sang-Woon Shin , Cheon-Woo Kim , Hyun-Je Cho , Young-Hwan Hwang , Seokju Hwang
摘要： Disclosed is a plasma torch with a structure capable of performing reversed polarity/straight polarity operation, wherein the plasma torch is coupled to a melter and melts a waste material such as radioactive waste or industrial waste by generating and sustaining a plasma arc between electrodes, the plasma torch including: a rear electrode provided inside a torch pipe and electrically connected to become one of an anode and a cathode; and a front electrode provided at a front end of the torch pipe at a position adjacent to a front end of the rear electrode and electrically connected to become a remaining one of the anode and the cathode, wherein electrical connections of the rear and front electrodes are switchable with each other so that the plasma torch operates as a reversed polarity plasma torch or a straight polarity plasma torch.
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