- 专利标题： CHEMICAL DECONTAMINATION METHOD
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申请号： US17479126申请日： 2021-09-20
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公开(公告)号： US20220102019A1公开(公告)日： 2022-03-31
- 发明人: Takashi Oohira , Shintaro Yanagisawa , Satoshi Oouchi , Nobuyuki Ota , Ryo Hamada , Hideyuki Hosokawa
- 申请人： Hitachi-GE Nuclear Energy, Ltd.
- 申请人地址： JP Ibaraki
- 专利权人： Hitachi-GE Nuclear Energy, Ltd.
- 当前专利权人： Hitachi-GE Nuclear Energy, Ltd.
- 当前专利权人地址： JP Ibaraki
- 优先权： JP2020-164910 20200930
- 主分类号： G21F9/28
- IPC分类号： G21F9/28
摘要：
A chemical decontamination method capable of improving the decontamination efficiency of chemical decontamination of a steam dryer in the RPV is provided. In particular, the decontamination method includes feeding a chemical decontamination aqueous solution into a reactor pressure vessel in which a steam dryer is arranged, and after chemical decontamination of the steam dryer, the water level of the chemical decontamination aqueous solution existing in the reactor pressure vessel is lowered to a first water level below the lower end of the steam dryer.
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