Samsung Electronics Co., Ltd.

Korea Hydro Nuclear Power Co., Ltd.

Mi-Hyun Lee

Jae-Weon Cho

Hyun-Jeong Kang

Sung-Jin Lee

Hyoung-Kyu Lim

Song-Nam Hong

Jung-Je Son

Pan-Yuh Joo

Yeong-Moon Son

Young-Ho Kim

Ho-Kyu Choi

Cheon-Woo Kim

Young-Bin Chang

Chi-Woo Lim

Young Hwan Hwang

Seok-Ju Hwang

Chang-Yoon Oh

Dong-seek Park

Joon-Young Choi

Ki-Chun Cho

Hyun-Kyu Yu

Ji-Yun Seol

Eun-Taek Lim

Hong-Sung Chang

Tae-Young Kim

Sung-Hoon Hong

Jaehyuk Jang

Hee-Won Kang

Jeong-ho Park

Su-Ryong Jeong

Cheng Shan

Jun-Sung Lim

Ju-Young Yoon

Jae-Wong Cho

Seung-Hoon Park

Seung-Hoon Choi

Sung-Eun Park

Hyeon-Woo Lee

Shuangfeng Han

Jeong-Ho Park

Dong-Seek Park

Young-Bo Cho

Seong-Hyeon Chae

Soon-Mi Cho

Doo-Hee Lee

Jun-Young Jung

Sung-hoon Hong

Jong-Hyun Won

Jae-Hyuk Jang

Jae-Gwa Lee

Song-Eun Park

Tang Yang

Pan-Yun Joo

Pah-Yuh Joo

Joong-Ho Park

Jae-Woon Cho

Jae-Weon 104-1103 Hyundae Ipark Apt Cho

Jung-Je 701-903 Jeongdeun Maeul Hanjin 7Danji Apt Son

Hyooung-Kyu Lim

A dismantling and decontamination system of biodegradable concrete of a nuclear power plant according to an exemplary embodiment includes: a dismantling device for dismantling an in-core instrument installed under biodegradable concrete to form a lower penetrated part of the biodegradable concrete; a decontamination device inserted inside the biodegradable concrete for decontaminating radioactive waste of the inner wall of the biodegradable concrete; a waste receiving device movable through the lower penetrated part of the biodegradable concrete; and a blocking device for blocking the upper opening of the biodegradable concrete to block an outflow of the radioactive dust.

Dismantling and decontamination system and method of bioprotective concrete of PWR type nuclear power plant

A method for decommissioning a nuclear facility includes: floating a nuclear reactor pressure vessel above a cavity; positioning a mounting device on bio-protective concrete to cover the cavity with the mounting device; mounting a lower portion of the nuclear reactor pressure vessel on the mounting device; and cutting and decommissioning the nuclear reactor pressure vessel mounted on the mounting device.

Method for decommissioning nuclear facility

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.

Safety cover structure usable in dismantling operations at nuclear facility

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.

Method for decommissioning nuclear facilities

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.

Method for dismantling nuclear facility underwater

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.

Method for disassembling heavy-water reactor equipment by using cutting device

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.

Nuclear reactor dismantlement system

A decommissioning method of biological shielding concrete of a nuclear power plant according to an exemplary embodiment includes: decommissioning a neutron detector positioning device installed to biological shielding concrete surrounding a nuclear reactor to form a plurality of penetrated parts in the biological shielding concrete; inserting a part of a cutting device into the plurality of penetrated parts; and decomposing the biological shielding concrete into a plurality of sub-concrete parts by using the cutting device.

Decommissioning method of biodegradable concrete of PWR type nuclear power plant

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.

Apparatus for treating waste of nuclear reactor pressure vessel, and method for treating waste of nuclear reactor pressure vessel

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.

Device for removing shielding balls from calandria of heavy water nuclear reactor

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.

Nuclear reactor decommissioning system

To transmit and receive system information of a base station in a broadband wireless access system, operations of the base station include determining transmission periodicities of a plurality of system information subpackets periodically transmitted in a periodicity of two or more superframes, determining transmission offsets of the subpackets based on the transmission periodicities using a predefined rule for determining a transmission periodicity and a transmission offset, and transmitting the subpackets respectively according to the transmission periodicities and the transmission offsets.

Apparatus and method for transmitting broadcast channel in broadband wireless access system

An apparatus and a method for transmitting control information in a small base station of a wireless communication system are provided. In the method, when the small base station operates in a Low Duty operation Mode (LDM) in a superframe, a control signal including LDM operation information is generated. Only a subframe via which a preamble, a control signal including the LDM operation information, and a SuperFrame Header (SFH) are transmitted is transmitted during the superframe. When the small base station operates in a normal operation mode in a superframe, at least one of the control information and data is transmitted via at least one subframe of the superframe.

Apparatus and method for transmitting signal in wireless communication system

An apparatus and a method for indicating uplink resource allocation in a broadband wireless communication system are provided. The method includes decoding an UpLink (UL) resource allocation Information Element (IE) in a received DownLink (DL) subframe, extracting an indicator field value from the decoded UL resource allocation IE, the indicator field value indicating a Transmission Time Interval (TTI) type for a resource allocated to the terminal and a UL subframe location, and transmitting UL data through a resource allocated to the terminal based on the extracted indicator field value.

Apparatus and method for indicating uplink resource allocation in broadband wireless communication system

A system and method for state synchronization between a base station and a mobile station in a mobile communication system. A count value indicative of a state change of the base station is received. The received current count value is compared with a previous count value previously received and stored. If the current count value is different from the previous count value, the mobile station performs a network entry procedure with the base station.

System and method for state synchronization between a base station and a mobile station in a mobile communication system

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Seoul, South Korea

Mi-Hyun Lee