Patents by Inventor Hui-Jun Won

Hui-Jun Won 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).

  • Patent number: 11587693
    Abstract: The present disclosure provides a solidifying method of a radionuclide. The solidifying method of the radionuclide includes operations of: providing a low melting point glass including Bi2O3, B2O3, ZnO and SiO2; providing a glass mixture mixing a mixture to be treated containing a hydroxide of radionuclide and BaSO4 and the low melting point glass; and heating the glass mixture.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: February 21, 2023
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Hee Chul Eun, Na On Chang, Seon Byeong Kim, Wang Kyu Choi, Sang Yoon Park, Hui Jun Won, Man Soo Choi, Byung Seon Choi, Jei Kwon Moon, Chong Hun Jung, Song Bok Lee, Sang Hun Lee, Bum Kyoung Seo
  • Patent number: 11289232
    Abstract: A chemical decontamination reagent containing a reducing agent, a reductive metal ion, and an inorganic acid is provided to remove a radioactive oxide layer on a metal surface. The reagent can dissolve the radioactive oxide layer on the metal surface effectively at a relatively low temperature and enables a simple process of contacting the reagent to the radioactive oxide, thus economically effective in terms of cost and time required for the process. Since the decontamination does not use a conventional organic chelating agent such as oxalic acid, but the reducing agent as a main substance, the residuals of the reducing agent remained after decontamination can be decomposed and removed with an oxidizing agent. Due to the easy decomposition with the chemical decontamination reagent, secondary wastes can be minimized and the radionuclides remained in the decontamination reagent solution can be removed effectively.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: March 29, 2022
    Assignees: KOREA ATOMIC ENERGY RESEARCH INSTITUTE, KOREA HYDRO AND NUCLEAR POWER CO., LTD.
    Inventors: Hui-Jun Won, Chong-Hun Jung, Sang Yoon Park, Wangkyu Choi, Jung-Sun Park, Jeikwon Moon, In-Ho Yoon, Byung-Seon Choi
  • Publication number: 20210335513
    Abstract: The present disclosure provides a solidifying method of a radionuclide. The solidifying method of the radionuclide includes operations of: providing a low melting point glass including Bi2O3, B2O3, ZnO and SiO2; providing a glass mixture mixing a mixture to be treated containing a hydroxide of radionuclide and BaSO4 and the low melting point glass; and heating the glass mixture.
    Type: Application
    Filed: April 27, 2020
    Publication date: October 28, 2021
    Inventors: Hee Chul Eun, Na On Chang, Seon Byeong Kim, Wang Kyu Choi, Sang Yoon Park, Hui Jun Won, Man Soo Choi, Byung Seon Choi, Jei Kwon Moon, Chong Hun Jung, Song Bok Lee, Sang Hun Lee, Bum Kyoung Seo
  • Patent number: 10762997
    Abstract: A decontamination method that includes the steps of decontaminating an object containing radioactive contaminated metals or alloys with a chemical decontamination agent including sulfuric acid (H2SO4) and forming a Ba or Sr precipitate by adding a Ba or Sr cation and a hydroxylion or halogen anion salts to the decontamination waste water.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: September 1, 2020
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Sang Yoon Park, Hui-Jun Won, Seonbyeong Kim, Wangkyu Choi, Mansoo Choi, Chong-Hun Jung, In-Ho Yoon, JeikWon Moon, Jun Young Jung, Jungsoon Park
  • Publication number: 20190027263
    Abstract: A chemical decontamination reagent containing a reducing agent, a reductive metal ion, and an inorganic acid is provided to remove a radioactive oxide layer on a metal surface. The reagent can dissolve the radioactive oxide layer on the metal surface effectively at a relatively low temperature and enables a simple process of contacting the reagent to the radioactive oxide, thus economically effective in terms of cost and time required for the process. Since the decontamination does not use a conventional organic chelating agent such as oxalic acid, but the reducing agent as a main substance, the residuals of the reducing agent remained after decontamination can be decomposed and removed with an oxidizing agent. Due to the easy decomposition with the chemical decontamination reagent, secondary wastes can be minimized and the radionuclides remained in the decontamination reagent solution can be removed effectively.
    Type: Application
    Filed: August 14, 2018
    Publication date: January 24, 2019
    Inventors: Hui-Jun WON, Chong-Hun JUNG, Sang Yoon PARK, Wangkyu CHOI, Jung-Sun PARK, Jeikwon MOON, In-Ho YOON, Byung-Seon CHOI
  • Publication number: 20180102194
    Abstract: The present invention provides a decontamination method including the steps of decontaminating an object containing radioactive contaminated metals or alloys with a chemical decontamination agent comprising sulfuric acid (H2SO4) and forming a Ba or Sr precipitate by adding Ba or Sr cation and hydroxyl ion or halogen anion salts to the decontamination waste water. The present invention also provides a kit for decontamination including a chemical decontamination agent including sulfuric acid (H2SO4) to decontaminate an object containing radioactive contaminated metals or alloys and Ba or Sr cation and hydroxyl ion or halogen anion salts to be added to the decontamination waste water to form a precipitate.
    Type: Application
    Filed: September 22, 2017
    Publication date: April 12, 2018
    Applicant: Korea Atomic Energy Research Institute
    Inventors: Sang Yoon Park, Hui-Jun Won, Seonbyeong Kim, Wangkyu Choi, Mansoo Choi, Chong-Hun Jung, In-Ho Yoon, JeikWon Moon, Jun Young Jung, Jungsoon Park
  • Patent number: 9390822
    Abstract: The present invention provides an oxidative decontamination reagent for removal of the dense radioactive oxide layer on a metal surface, which comprises an oxidizing agent, a metal ion, and an inorganic acid. The oxidative decontamination reagent of the present invention is characteristically prepared by adding a metal ion to the conventional oxidative decontamination reagent containing an oxidizing agent and an inorganic acid. When the oxidative decontamination reagent of the present invention is used, electric potential of the metal parts of the primary system of the nuclear power plant can be regulated as passive potential owing to the added metal ion during the oxidative decontamination of the primary metal part of the nuclear power plant. Therefore, by maintaining electric potential of the metal part as passive potential, local corrosion can be inhibited and at the same time secondary waste can be significantly reduced.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: July 12, 2016
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Sang Yoon Park, Hui-Jun Won, Wangkyu Choi, Jeikwon Moon, Chong-Hun Jung, In-Ho Yoon, Jun-Young Jung
  • Publication number: 20140378733
    Abstract: The present invention provides an oxidative decontamination reagent for removal of the dense radioactive oxide layer on a metal surface, which comprises an oxidizing agent, a metal ion, and an inorganic acid. The oxidative decontamination reagent of the present invention is characteristically prepared by adding a metal ion to the conventional oxidative decontamination reagent containing an oxidizing agent and an inorganic acid. When the oxidative decontamination reagent of the present invention is used, electric potential of the metal parts of the primary system of the nuclear power plant can be regulated as passive potential owing to the added metal ion during the oxidative decontamination of the primary metal part of the nuclear power plant. Therefore, by maintaining electric potential of the metal part as passive potential, local corrosion can be inhibited and at the same time secondary waste can be significantly reduced.
    Type: Application
    Filed: June 13, 2014
    Publication date: December 25, 2014
    Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Sang Yoon PARK, Hui-Jun WON, Wangkyu CHOI, Jeikwon MOON, Chong-Hun JUNG, In-Ho YOON, Jun-Young JUNG
  • Publication number: 20140205052
    Abstract: A chemical decontamination reagent containing a reducing agent, a reductive metal ion, and an inorganic acid is provided to remove a radioactive oxide layer on a metal surface. The reagent can dissolve the radioactive oxide layer on the metal surface effectively at a relatively low temperature and enables a simple process of contacting the reagent to the radioactive oxide, thus economically effective in terms of cost and time required for the process. Since the decontamination does not use a conventional organic chelating agent such as oxalic acid, but the reducing agent as a main substance, the residuals of the reducing agent remained after decontamination can be decomposed and removed with an oxidizing agent. Due to the easy decomposition with the chemical decontamination reagent, secondary wastes can be minimized and the radionuclides remained in the decontamination reagent solution can be removed effectively.
    Type: Application
    Filed: September 4, 2013
    Publication date: July 24, 2014
    Applicants: Korea Hydro And Nuclear Power Co., Ltd., Korea Atomic Energy Research Institute
    Inventors: Hui-Jun Won, Chong-Hun Jung, Sang Yoon Park, Wangkyu Choi, Jung-Sun Park, Jeikwon Moon, In-Ho Yoon, Byung-Seon Choi
  • Patent number: 7097717
    Abstract: Disclosed is a method and device for collecting particulate contaminants removed using a CO2 decontamination medium from an early step of a decontamination process. The device removes particulate contaminants from a contaminated subject by a decontamination stream, and simultaneously forms another stream for collecting such contaminants into a collecting filter, thus preventing such contaminants from diffusing into the atmosphere. The device forms streams between the nozzles and the surface of the contaminated subject to readily move the nozzles along the surface of the subject without frictional resistance, to reduce the sense of fatigue of the operator.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: August 29, 2006
    Assignees: Korea Atomic Energy Research Institute, Korea Hydro & Nuclear Power Company Ltd.
    Inventors: Chong-Hun Jung, Jei-Kwon Moon, Hui Jun Won, Won-Zin Oh, Jae-Hyung Yoo
  • Patent number: 6214189
    Abstract: A method and an apparatus for electrokinetically decontaminating the soil contained in a radioactive waste drum are disclosed. The radioactively contaminated soil is put into drums, and the drums are carried to a temporary storage or to a disposal site. If the extremely low level radioactive soil is decontaminated rather than carrying the soil to the temporary storage or to a disposal site, and if the decontaminated soil is returned to the nature, then the limited storage capacity can be saved. Further, if a high level radioactive soil is treated to a low level one, and if thus a low level radioactive soil is stored in a storage, then the safety is improved. In the present invention, electrodes are buried into the contaminated soil contained in a radioactive waste drum, and a dc current is supplied, so that the radioactive nuclide and impurities can be removed by the electroosmosis and the electromigration.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: April 10, 2001
    Assignees: Korea Atomic Energy Research Institute, Korea Electric Power Corporation
    Inventors: Hui-Jun Won, Byung-Gil Ahn, Gye-Nam Kim, Hoy-Sam Kwon, Chul-Yong Lee, Chong-Hun Jung, Byung-Jik Lee, Won-Zin Oh