Patents by Inventor Won-Pil Baek
Won-Pil Baek has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240145674Abstract: Provided is a positive electrode active material including a plurality of crystallites A, wherein the plurality of crystallites A has a crystallite long-axis orientation degree DoA represented by Equation 1 below is 0.5 to 1, and a crystallite c-axis orientation degree represented by a cross product value of a c-axis rotation vector Rc of a crystal lattice of a crystallite obtained by electron backscatter diffraction (EBSD) analysis and a position unit vector P? of the crystallite is 0.5 to 1. A proportion of the plurality of crystallites A is 25% to 80% with respect to a total number of crystallites in a cross-section of a positive electrode active material. Further provided is a positive electrode and a lithium secondary battery including the positive electrode active material.Type: ApplicationFiled: March 22, 2022Publication date: May 2, 2024Applicants: LG Chem, Ltd., LG Chem, Ltd.Inventors: Won Sig Jung, Hwan Young Choi, Hyun Ah Park, Hyeon Hui Baek, Jong Pil Kim
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Publication number: 20180218796Abstract: A hybrid safety injection tank system. The system is pressurized with a safety valve of a pressurizer, which functions as a low pressure safety injection tank and as a high pressure core makeup tank of a nuclear reactor emergency core cooling system. The safety valve is configured to be automatically operated in response to a pressure difference and is installed on a pressure equalization pipe that can realize pressure equalization between the low pressure safety injection tank and the high pressure pressurizer in the event of the nuclear power plant station blackout and power outage.Type: ApplicationFiled: May 14, 2013Publication date: August 2, 2018Applicant: Korea Atomic Energy Research InstituteInventors: Tae-Soon Kwon, Kihwan Kim, Chul-Hwa Song, Joon-Eon Yang, Won Pil Baek
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Patent number: 9478318Abstract: A residual heat removal system for a nuclear power plant. The residual heat removal system for a nuclear power plant may include an air duct provided on an outside of a reactor containment building, a heat exchanger disposed on an inside of the air duct, a first pipe to transfer, to the heat exchanger, steam generated in a steam generator disposed on an inside of the reactor containment building, and second pipe to transfer, to the steam generator, water condensation that is cooled and condensed in the heat exchanger, wherein the heat exchanger is air-cooled using outside air flowing inside of the air duct.Type: GrantFiled: September 13, 2012Date of Patent: October 25, 2016Assignee: Korea Atomic Energy Research InstituteInventors: Tae Soon Kwon, Chul Hwa Song, Joon Eon Yang, Won Pil Baek
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Patent number: 9129713Abstract: A high pressure safety injection tank (HPSIT) system includes one safety injection tank (HIT) which replaces a core makeup tank (CMT) and a low pressure (approximately 4.3 Mpa or below) safety injection tank (SIT) and which can shift to and operate on a high pressure (approximately 17 Mpa) operation mode, to enable injection of emergency core coolant into a reactor system both under low pressure (approximately 4.3 Mpa or below) and high pressure (approximately 17 Mpa).Type: GrantFiled: July 25, 2011Date of Patent: September 8, 2015Assignee: Korea Atomic Energy Research InstituteInventors: Tae-Soon Kwon, Dong-Jin Euh, Chul-Hwa Song, Won-Pil Baek
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Patent number: 8630385Abstract: The present invention relates to a longitudinally divided emergency core cooling (ECC) duct in order to efficiently inject safety water to core of a pressurized light-water nuclear reactor. The ECC duct includes side supports for preventing the flow-induced vibration in the annular downcomer, and has structural stability while thermally expanding and contracting. A longitudinally divided ECC duct for emergency core cooling water injection of a nuclear reactor is provided on the periphery of a core barrel of a nuclear reactor, includes an emergency core cooling water inlet facing a direct vessel injection nozzle, and extends in a longitudinal direction of the core barrel. The longitudinally divided ECC duct is divided into a plurality of longitudinally-divided ducts in the longitudinal direction of the longitudinally divided ECC duct.Type: GrantFiled: July 9, 2009Date of Patent: January 14, 2014Assignees: Korea Atomic Energy Ressearch Institute, Korea Hydro and Nuclear Power Co., LtdInventors: Tae-Soon Kwon, Dong Jin Euh, In-Cheol Chu, Seok Cho, Nam Hyun Choi, Chul-Hwa Song, Won Pil Baek, Jun-Hwa Hong
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Publication number: 20130202075Abstract: A residual heat removal system for a nuclear power plant. The residual heat removal system for a nuclear power plant may include an air duct provided on an outside of a reactor containment building, a heat exchanger disposed on an inside of the air duct, a first pipe to transfer, to the heat exchanger, steam generated in a steam generator disposed on an inside of the reactor containment building, and second pipe to transfer, to the steam generator, water condensation that is cooled and condensed in the heat exchanger, wherein the heat exchanger is air-cooled using outside air flowing inside of the air duct.Type: ApplicationFiled: September 13, 2012Publication date: August 8, 2013Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTEInventors: Tae Soon Kwon, Chul Hwa Song, Joon Eon Yang, Won Pil Baek
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Publication number: 20120263268Abstract: A high pressure safety injection tank (HPSIT) system includes one safety injection tank (HIT) which replaces a core makeup tank (CMT) and a low pressure (approximately 4.3 Mpa or below) safety injection tank (SIT) and which can shift to and operate on a high pressure (approximately 17 Mpa) operation mode, to enable injection of emergency core coolant into a reactor system both under low pressure (approximately 4.3 Mpa or below) and high pressure (approximately 17 Mpa).Type: ApplicationFiled: July 25, 2011Publication date: October 18, 2012Applicants: Korea Hydro and Nuclear Power Co., Ltd., Korea Atomic Energy Research InstituteInventors: Tae-Soon Kwon, Dong-Jin Euh, Chul-Hwa Song, Won-Pil Baek
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Patent number: 7983377Abstract: An emergency core cooling system directly injects emergency core cooling water, which is supplied from a high-pressure safety injection pump or a safety injection tank for a pressurized light water reactor, into a reactor vessel downcomer. A pipe connector is completely removed from between each direct vessel injection nozzle and each injection extension duct installed on an outer surface of the core barrel, which are opposite to each other. An emergency core cooling water intake port, through which the water is injected from each direct vessel injection nozzle, is formed on the surface of each injection extension duct facing an axis of each direct vessel injection nozzle. Thereby, a structure in which a jet of the emergency core cooling water flows into the injection extension ducts is adopted in a hydraulic connection fashion.Type: GrantFiled: May 20, 2008Date of Patent: July 19, 2011Assignees: Korea Atomic Energy Research Institute, Korea Hydro and Nuclear Power Co., Ltd.Inventors: Tae-Soon Kwon, Chul-Hwa Song, Won-Pil Baek
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Patent number: 7920666Abstract: A safety injection tank, used for quickly injecting emergency core cooling water (ECCW) to a reactor vessel in the case of a cold leg large break accident (CLLBA) in a pressurized water reactor (PWR), is disclosed. The safety injection tank has a gravity-driven fluidic device configured to efficiently change the ECCW injection mode from a high flow injection mode to a low flow injection mode. The gravity-driven fluidic device includes a spring placed in the upper end of the vertical pipe, and a vertically movable water tub placed on the spring so as to be movable in a vertical direction. When ECCW contained in the pressure vessel is discharged and the water level is reduced lower than the height of the tub, the tub is moved downwards such that the lower surface thereof comes into contact with the vertical pipe and closes the high flow inlet port.Type: GrantFiled: May 28, 2008Date of Patent: April 5, 2011Assignees: Korea Atomic Energy Research Institute, Korea Hydro and Power Co., Ltd.Inventors: Tae-Soon Kwon, In-Chul Chu, Chul-Hwa Song, Won-Pil Baek
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Publication number: 20100278294Abstract: The present invention relates to a longitudinally divided emergency core cooling (ECC) duct in order to efficiently inject safety water to core of a pressurized light-water nuclear reactor. The ECC duct includes side supports for preventing the flow-induced vibration in the annular downcomer, and has structural stability while thermally expanding and contracting. A longitudinally divided ECC duct for emergency core cooling water injection of a nuclear reactor is provided on the periphery of a core barrel of a nuclear reactor, includes an emergency core cooling water inlet facing a direct vessel injection nozzle, and extends in a longitudinal direction of the core barrel. The longitudinally divided ECC duct is divided into a plurality of longitudinally-divided ducts in the longitudinal direction of the longitudinally divided ECC duct.Type: ApplicationFiled: July 9, 2009Publication date: November 4, 2010Applicants: KOREA ATOMIC ENERGY RESEARCH INSTITUTE, KOREA HYDRO & NUCLEAR POWER CO., LTD.Inventors: Tae-Soon KWON, Dong Jin EUH, In-Cheol CHU, Seok CHO, Nam Hyun CHOI, Chui-Hwa SONG, Won Pil BAEK, Jun-Hwa HONG
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Publication number: 20090279657Abstract: A safety injection tank, used for quickly injecting emergency core cooling water (ECCW) to a reactor vessel in the case of a cold leg large break accident (CLLBA) in a pressurized water reactor (PWR), is disclosed. The safety injection tank has a gravity-driven fluidic device configured to efficiently change the ECCW injection mode from a high flow injection mode to a low flow injection mode. The gravity-driven fluidic device includes a spring placed in the upper end of the vertical pipe, and a vertically movable water tub placed on the spring so as to be movable in a vertical direction. When ECCW contained in the pressure vessel is discharged and the water level is reduced lower than the height of the tub, the tub is moved downwards such that the lower surface thereof comes into contact with the vertical pipe and closes the high flow inlet port.Type: ApplicationFiled: May 28, 2008Publication date: November 12, 2009Applicants: Korea Atomic Research Energy Research Institute, Korea Hydro and Nuclear Power Co., Ltd.Inventors: Tae-Soon Kwon, In-Chul Chu, Chul-Hwa Song, Won-Pil Baek
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Publication number: 20090232267Abstract: An emergency core cooling system directly injects emergency core cooling water, which is supplied from a high-pressure safety injection pump or a safety injection tank for a pressurized light water reactor, into a reactor vessel downcomer. A pipe connector is completely removed from between each direct vessel injection nozzle and each injection extension duct installed on an outer surface of the core barrel, which are opposite to each other. An emergency core cooling water intake port, through which the water is injected from each direct vessel injection nozzle, is formed on the surface of each injection extension duct facing an axis of each direct vessel injection nozzle. Thereby, a structure in which a jet of the emergency core cooling water flows into the injection extension ducts is adopted in a hydraulic connection fashion.Type: ApplicationFiled: May 20, 2008Publication date: September 17, 2009Applicants: Korea Atomic Energy Research Institute, Korea Hydro and Nuclear Power Co., Ltd.Inventors: Tae-Soon Kwon, Chul-Hwa Song, Won-Pil Baek
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Patent number: 7089805Abstract: An average bidirectional flow tube, including a body having two side plates and upper and lower plates, a partition plate installed to be perpendicular to the side plates of the body so that front and rear ends of the tube are separated from each other, and two pairs of pressure impulse lines installed at front and rear positions of the partition plate. The upper and lower plates of the body each have a curvature to be in contact with an inner surface of a pipe in which the average bidirectional flow tube is installed, and each of the pressure impulse lines is installed to communicate with an interior of the pipe. Although a two-phase flow occurs in the pipe or the flow of the fluid flowing in the pipe is changed, an average flow rate of a fluid can be measured. Particularly, it is easy to measure an average flow rate of the fluid when the fluid flows at a low speed. Further, even when sudden pressure reduction occurs in the pipe, an additional cooling device is not required.Type: GrantFiled: February 1, 2005Date of Patent: August 15, 2006Assignee: Korea Atomic Energy Research InstituteInventors: Byong-Jo Yun, Kyoung-Ho Kang, Dong-Jin Euh, Won-Pil Baek
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Publication number: 20050229717Abstract: An average bidirectional flow tube, including a body having two side plates and upper and lower plates, a partition plate installed to be perpendicular to the side plates of the body so that front and rear ends of the tube are separated from each other, and two pairs of pressure impulse lines installed at front and rear positions of the partition plate. The upper and lower plates of the body each have a curvature to be in contact with an inner surface of a pipe in which the average bidirectional flow tube is installed, and each of the pressure impulse lines is installed to communicate with an interior of the pipe. Although a two-phase flow occurs in the pipe or the flow of the fluid flowing in the pipe is changed, an average flow rate of a fluid can be measured. Particularly, it is easy to measure an average flow rate of the fluid when the fluid flows at a low speed. Further, even when sudden pressure reduction occurs in the pipe, an additional cooling device is not required.Type: ApplicationFiled: February 1, 2005Publication date: October 20, 2005Inventors: Byong-Jo Yun, Kyoung-Ho Kang, Dong-Jin Euh, Won-Pil Baek
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Patent number: 6928133Abstract: A direct vessel injection-type pressurized light water reactor (DVI-PLWR), in which an emergency core cooling water (ECC) is directly injected into a downcomer of a reactor vessel, is disclosed. In order to reduce the ratio of ECC bypass from the downcomer to a broken area of a cold leg in the case of a cold leg guillotine break (CLGB), such as a double-ended guillo4tine break (DEGB), a plurality of corrugations, having a V-shaped cross-section, are vertically arranged around each of the inner surface of a pressure vessel and the outer surface of a core barrel at regular intervals, with a vertical groove formed between two neighboring corrugations. The grooves phase-separate the ECC from a high-speed lateral flow of fluid running in the downcomer, and the separated ECC stagnates in the form of vortexes in the grooves, prior to flowing down to the lower section of the downcomer due to gravity.Type: GrantFiled: June 25, 2003Date of Patent: August 9, 2005Assignee: Korea Atomic Energy Research InstituteInventors: Tae-Soon Kwon, Chul-Hwa Song, Won-Pil Baek, Jong-kyun Park
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Publication number: 20040218709Abstract: A direct vessel injection-type pressurized light water reactor (DVI-PLWR), in which an emergency core cooling water (ECC) is directly injected into a downcomer of a reactor vessel, is disclosed. In order to reduce the ratio of ECC bypass from the downcomer to a broken area of a cold leg in the case of a cold leg guillotine break (CLGB), such as a double-ended guillo4tine break (DEGB), a plurality of corrugations, having a V-shaped cross-section, are vertically arranged around each of the inner surface of a pressure vessel and the outer surface of a core barrel at regular intervals, with a vertical groove formed between two neighboring corrugations. The grooves phase-separate the ECC from a high-speed lateral flow of fluid running in the downcomer, and the separated ECC stagnates in the form of vortexes in the grooves, prior to flowing down to the lower section of the downcomer due to gravity.Type: ApplicationFiled: June 25, 2003Publication date: November 4, 2004Inventors: Tae-Soon Kwon, Chul-Hwa Song, Won-Pil Baek, Jong-Kyun Park