Patents Assigned to Korea Hydro & Nuclear Power Co., Ltd.
  • Patent number: 12033765
    Abstract: 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.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: July 9, 2024
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Young Hwan Hwang, Seok-Ju Hwang, Mi-Hyun Lee, Cheon-Woo Kim
  • Patent number: 12022600
    Abstract: 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.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: June 25, 2024
    Assignee: Korea Hydro & Nuclear Power Co., Ltd.
    Inventors: Hyun-Je Cho, Cheon-Woo Kim
  • Patent number: 12014837
    Abstract: The present invention provides a method for integrated online monitoring and a system for integrated online monitoring from a remote location for a nuclear power plant. The method includes a first step of collecting machine monitoring data of a plurality of units in the nuclear power plant selectively from the local data acquisition device via the monitoring data relay device, and a second step of collecting machine diagnostic data of a plurality of units in the nuclear power plant selectively from the local data acquisition device via the diagnostic data relay device.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 18, 2024
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Dae Woong Kim, Yang Seok Kim, Bum Nyun Kim, Young Sheop Park, Chi Yong Park, Jong Seog Kim, Hyoung Kyun Kim, Byoung Oh Lee, Ji In Kim, Nam Woo Choi, Jae Hun Shin, Jae Min An, Yong Chan Kim
  • Patent number: 12002594
    Abstract: A method for decommissioning a nuclear facility includes: floating the nuclear reactor pressure vessel above the cavity; rotating the reactor pressure vessel so that the upper portion of the nuclear reactor pressure vessel is closer to the bio-protective concrete than the lower portion; mounting the upper portion of the nuclear reactor pressure vessel on the neighboring upper surface of the bio-protective concrete; and cutting and decommissioning the nuclear reactor pressure vessel mounted on the neighboring upper surface.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: June 4, 2024
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Young Hwan Hwang, Seok-Ju Hwang, Mi-Hyun Lee, Cheon-Woo Kim
  • Patent number: 11984233
    Abstract: 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.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: May 14, 2024
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Seok-Ju Hwang, Young Hwan Hwang, Hang-Rae Cho, Cheon-Woo Kim
  • Patent number: 11960271
    Abstract: The present invention relates to a power plant early warning device and method which employ a multiple prediction model, and includes: a plurality of prediction models which receive information about the operation states of equipment in a power plant, and output prediction values and the reliabilities of the prediction values; a reliability analysis module which quantizes and analyzes the reliabilities output from the plurality of prediction models to determine the ranks of the plurality of prediction models, and calculates a final prediction value; a comparison module which compares the final prediction value with an actual measurement value, and outputs a residual; and a determination module which analyzes the residual to determine whether there are defects in the operating states of the equipment in the power plant.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: April 16, 2024
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD
    Inventors: Ji Ho Min, Dae Woong Kim, Do Hwan Lee, Yun Goo Kim
  • Publication number: 20240034646
    Abstract: Provided is a UV reaction apparatus for treating waste liquid caused by system decontamination in a nuclear power plant. The UV reaction apparatus comprises a UV irradiation unit for irradiating UV light as a bar-shaped body; and a transit unit accommodating the UV irradiation unit therein, and for passing organic waste liquid to be irradiated with the UV light, wherein the transit unit comprises, an input unit, into which the organic waste liquid is input a discharge unit, through which the organic waste liquid is discharged, and an intermediate unit located between the input unit and the discharge unit, and in which the UV irradiation unit is located.
    Type: Application
    Filed: March 4, 2022
    Publication date: February 1, 2024
    Applicant: KOREA HYDRO & NUCLEAR POWER CO., LTD
    Inventors: Cho Rong KIM, Hak Soo KIM, Jeong Ju KIM, Sang Ho LEE, Eun Hee HONG, Ji Eun PARK, Ka Hee JEONG
  • Publication number: 20240029908
    Abstract: Provided is a device for monitoring degradation of wastewater from nuclear power plant decontamination. The device for monitoring degradation of wastewater from nuclear power plant decontamination comprises a UV reactor connected to a first flow path and for UV-treating introduced wastewater; a wastewater degradation flow path for supplying the wastewater discharged from the UV reactor to the first flow path; a wastewater degradation detecting unit for analyzing components of the wastewater supplied from the wastewater degradation flow path and detecting whether a set condition is satisfied; and a purification flow path for purifying and supplying the wastewater supplied from the UV reactor to the first flow path when the set condition is satisfied.
    Type: Application
    Filed: March 4, 2022
    Publication date: January 25, 2024
    Applicant: KOREA HYDRO & NUCLEAR POWER CO., LTD
    Inventors: Hak Soo KIM, Cho Rong KIM, Jeong Ju KIM, Jin Soo CHOI, Kyung Hee LEE
  • Publication number: 20240013943
    Abstract: The present invention relates to a transport basket for defective spent nuclear fuel of a heavy water reactor and, more particularly, to a transport basket for defective spent nuclear fuel of a heavy water reactor that can reduce the burden of a personnel when handling spent nuclear fuel in a test facility by minimizing a storage space and maximizing a thickness such that only a predetermined amount of spent nuclear fuel for soundness evaluation in the test facility can be transported.
    Type: Application
    Filed: October 21, 2021
    Publication date: January 11, 2024
    Applicant: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Sunghwan CHUNG, Yongdeog KIM, Kiyoung KIM, Taehyeon KIM, Donghee LEE, Jinwon SON, Dong-Gyu LEE, In-Su JUNG, Ke-Hyung YANG, Jae-Hun KO, Duk-Woon JUNG
  • Patent number: 11867851
    Abstract: A device for measuring large-area radioactive surface contamination can simultaneously obtain a plurality of detection values. The measurement device includes a frame body having a plurality of holes; a mover that is connected to, and moves, the frame body; and a plurality of radiation detectors that rest in the plurality of holes. The detectors detect one or more of: alpha rays, beta rays, or gamma rays. The location and level of radioactive contamination are accurately identified according to a comparison of the detection values of the plurality of radiation detectors.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: January 9, 2024
    Assignee: Korea Hydro & Nuclear Power Co., Ltd.
    Inventors: Moon Hyung Cho, Yu Ho Weon, Hyeongjin Kim
  • Publication number: 20240001459
    Abstract: Proposed is a cutting apparatus for a fuel basket accommodating spent nuclear fuel of a heavy water reactor, wherein the apparatus includes a base, a vertical support arranged on one side of the base; a turn table arranged to be reciprocated between one side and an opposite side of the base and be horizontally rotatable on the base; a horizontal support arranged to extend from an upper-end of the vertical support in a horizontal direction toward the turn table; a side-cutting means arranged on the vertical support protruding toward the turn table for cutting a side welding bead of the fuel basket mounted on the turn table; and an upper-cutting means arranged on the horizontal support protruding toward the turn table for cutting an upper welding bead of the fuel basket mounted on the turn table.
    Type: Application
    Filed: October 21, 2021
    Publication date: January 4, 2024
    Applicant: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Sunghwan CHUNG, Yongdeog KIM, Kiyoung KIM, Taehyeon KIM, Donghee LEE, Jinwon SON, Dong-Gyu LEE, In-Su JUNG, Ke-Hyung YANG, Jun-Sang JANG, Tae-Su KIM
  • Patent number: 11848114
    Abstract: An underwater decommissioning method of a nuclear facility including a nuclear reactor pressure vessel and bio-protective concrete comprising a cavity in which the nuclear reactor pressure vessel is positioned is disclosed. The method includes: (a) lifting the nuclear reactor pressure vessel above the cavity; (b) forming an insertion part in the bio-protective concrete adjacent to the cavity, filling the insertion part with water, and installing a support part on a bottom surface of the insertion part; (c) inserting the nuclear reactor pressure vessel in the insertion part and mounting a lower portion of the nuclear reactor pressure vessel on the support part; and (d) repeatedly cutting portions of the nuclear reactor pressure vessel mounted on the support part by using a cutting device in an underwater position. The method allows performing cutting operations in the water, and thus, it is possible to prevent radiation exposure due to occurrence of dust.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: December 19, 2023
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Ju-Young Yoon, Young Hwan Hwang, Mi-Hyun Lee, Cheon-Woo Kim
  • Patent number: 11848115
    Abstract: A radioactive structure dismantling method of a heavy water reactor facility that includes a calandria including a main shell and a sub shell, a calandria vault that receives the calandria therein, and a cover assembly that covers the calandria according to an embodiment, includes: preparing dismantling of the calandria; dismantling a reactor pipe installed in the calandria; dismantling the cover assembly that covers the calandria; dismantling the calandria; and dismantling the calandria vault.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: December 19, 2023
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Seok-Ju Hwang, Young Hwan Hwang, Ju-Young Yoon, Cheon-Woo Kim
  • Publication number: 20230394301
    Abstract: The present invention relates to a device for tracking the basis of an abnormal state determination by using a neural network model, comprising: an abnormality type classification unit for classifying an abnormal state into a plurality of failures in an abnormal operation scenario in which a plurality of scenarios related to the abnormal state are stored; an operation variable deriving unit for deriving operation variables affecting an abnormal state determination result for each of the plurality of classified failures; a power plant operation variable weighting unit for weighting the variable related to the abnormal state from among the operation variables; and an abnormal state determination basis generation unit for tracking the basis of an abnormal state determination from the abnormal state determination result generated through the weighted power plant operation variable.
    Type: Application
    Filed: November 15, 2021
    Publication date: December 7, 2023
    Applicant: KOREA HYDRO & NUCLEAR POWER CO., LTD
    Inventors: Yun Goo Kim, No Kyu Seong, Dae Seung Park
  • Patent number: 11830632
    Abstract: A device for separating a shielding slab for a heavy water reactor according to an embodiment includes: a body; a circular rail installed on at least one side of the body; and a decommissioner for decommissioning a shielding slab installed on the circular rail and installed on an inner wall of a heavy water reactor, wherein the decommissioner includes a decommission head moving on the circular rail, a separator installed in the decommission head and separating and desalinizing the shielding slab, and a gripper installed in the decommission head and gripping the separated shielding slab.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: November 28, 2023
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Young Hwan Hwang, Seok-Ju Hwang, Ju-Young Yoon, Cheon-Woo Kim
  • Patent number: 11830633
    Abstract: A method for decommissioning a heavy water reactor facility includes: opening an upper part of the calandria vault; inserting a support device into an inner part of the calandria vault through the upper part of the calandria vault to support the main shell of the calandria; cutting between the main shell and the sub-shell of the calandria by inserting a cutting device into the inner part of the calandria vault through the upper part of the calandria vault; and drawing out the main shell of the calandria to the outside of the calandria vault by moving the support device from the inner part of the calandria vault to the outside through the upper part.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: November 28, 2023
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Seok-Ju Hwang, Young Hwan Hwang, Mi-Hyun Lee, Cheon-Woo Kim
  • Patent number: 11828887
    Abstract: The present invention relates to a radioactivity measurement method and a radioactivity measurement system. A radioactivity measurement method according to the present invention comprises the steps of: measuring radioactivity while performing energy scanning and temporal scanning; preparing a database from a time-energy-related data set obtained in result of the scanning; and obtaining a radioactivity measurement value of desired time from the database.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: November 28, 2023
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD
    Inventor: Seung Chan Lee
  • Patent number: 11830634
    Abstract: 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.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: November 28, 2023
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Young Hwan Hwang, Seok-Ju Hwang, Ju-Young Yoon, Cheon-Woo Kim
  • Patent number: 11823806
    Abstract: A nuclear reactor dismantlement system according to an embodiment includes bio-protective concrete including a first space into which a reactor is inserted and a second space that is connected to the first space and is expanded in the first space, a moving device that is positioned in the second space and moves the reactor, and a cutting device that is positioned in the second space and cuts the reactor.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: November 21, 2023
    Assignee: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Young Hwan Hwang, Mi-Hyun Lee, Sung-Hoon Hong, Cheon-Woo Kim
  • Publication number: 20230307150
    Abstract: Proposed is a reactor cooling system for cooling down a reactor damaged by a disaster accident and a reactor cooling method using same using contaminated water generated at a nuclear reactor as a cooling water source for cooling the nuclear reactor after the accident, thereby maximally suppressing discharge of the contaminated water into the sea. To this end, the reactor cooling system prosed above includes a nuclear power generation facility, a seawater storage tank, a seawater inflow flow path for introducing the seawater into the seawater storage tank and a seawater discharge flow path for discharging the seawater from the seawater storage tank to the sea, connected to one end and another end of the seawater storage tank, respectively, a heat exchanger installed in a water storage space of the seawater storage tank, a contaminated water supply flow path, and a contaminated water discharge flow path.
    Type: Application
    Filed: July 12, 2021
    Publication date: September 28, 2023
    Applicant: KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Ho Rim MOON, Sang Hee KANG, Huiun HA