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公开(公告)号：US11646123B2
公开(公告)日：2023-05-09
申请号：US16221797
申请日：2018-12-17
Applicant: Korea Atomic Energy Research Institute
Inventor： Sung Il Kim , Kwang Soon Ha , Jin-Ho Song , Yong Mann Song , Byeonghee Lee
CPC classification number: G21C9/00 , G21D1/02 , G21D3/06 , G21F9/001 , G21C9/012 , G21C17/002 , G21C19/30
Abstract: Disclosed herein is a nuclear power plant main steam system that reduces the atmospheric discharge of radioactive materials generated in an accident. The system includes: a decontamination water tank containing decontamination water; and a connection pipe for connecting the decontamination water tank to a main steam pipe which connects a steam generator and a turbine. A main steam safety valve or a connection valve is provided as a three-way valve configured to discharge the generated steam to the atmosphere when an accident occurs within a design basis and to transfer the generated steam to the decontamination water tank when an accident involving damage to nuclear fuel occurs. The main steam system reduces discharge of radioactive materials to the atmosphere when a containment bypass accident (e.g., a steam generator tube rupture caused by high-temperature steam) occurs.
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公开(公告)号：US11823804B2
公开(公告)日：2023-11-21
申请号：US17121873
申请日：2020-12-15
Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
Inventor： Jin-Ho Song , Kwang Soon Ha , Byeonghee Lee , Sung Il Kim , Yong Mann Song
Abstract: A steam generator accident mitigation system is disclosed. A steam generator accident mitigation system to mitigate an accident if the accident occurs in a steam generator installed inside a containment building of a nuclear power plant according to an exemplary embodiment of the present system, the system including: a pressurizing tank which is installed inside the containment building and includes a first cooling water and a non-condensable gas for pressurizing the first cooling water therein; at least one connecting pipe connecting the steam generator and the pressurizing tank; and at least one connecting pipe valve which is installed in the at least one connecting pipe, respectively, and is able to control the amount of opening of the connecting pipe; wherein opening of the at least one connecting pipe valve permits fluid communication between the steam generator and the pressurizing tank.
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3.发明申请公开(公告)号：US20190189299A1
公开(公告)日：2019-06-20
申请号：US16221797
申请日：2018-12-17
Applicant: Korea Atomic Energy Research Institute
Inventor： Sung Il Kim , Kwang Soon Ha , Jin-Ho Song , Yong Mann Song , Byeonghee Lee
CPC classification number: G21D3/06 , G21C17/002 , G21D1/02 , G21F9/001
Abstract: Disclosed herein is a nuclear power plant main steam system, which reduces the atmospheric discharge of radioactive materials generated in an accident, the system including: a decontamination water tank containing decontamination water; and a connection pipe for connecting the decontamination water tank from a main steam pipe which connects a steam generator and a turbine, wherein the connection pipe is connected to the decontamination water tank through a main steam safety valve or a connection valve, wherein the main steam safety valve or the connection valve is configured by a three-way valve and is configured to discharge the generated steam to the air when an accident occurs within a design basis and to transfer the generated steam to the decontamination water tank when a severe accident occurs. A main steam system according to the present invention has an effect of reducing discharge of radioactive materials to the air when a containment bypass accident including a steam generator tube rupture caused by high-temperature steam occurs.
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