Title:
余剰水の処理方法及び余剰水の処理システム
Document Type and Number:
Japanese Patent JP7324921
Kind Code:
B2
Abstract:
To promptly remove oxalic acid included in excess water.SOLUTION: A method for treating excess water including oxalic acid and generated by supplying pure water to devices in a nuclear power plant system when chemically decontaminating the system comprises: a pH control step of adding a pH adjuster to a tank for storing the excess water to control the pH of the excess water to 6.0 or less; an oxalic acid decomposition step of adding potassium permanganate to the excess water after the pH control step to decompose the oxalic acid in the excess water; a permanganic acid ion decomposition step of adding sodium hydrogen sulfite to the excess water after the oxalic acid decomposition step to decompose permanganic acid ions in the excess water; and a hydroxide addition step of adding alkali metal hydroxide to the excess water after the permanganic acid ion decomposition step.SELECTED DRAWING: Figure 3
Inventors:
Takashi Nakano
Yuta Nakado
Kai Satsuki
Tomomi Yoshinaga
Hironori Onizuka
Ryo Nagata
Yuta Nakado
Kai Satsuki
Tomomi Yoshinaga
Hironori Onizuka
Ryo Nagata
Application Number:
JP2022160981A
Publication Date:
August 10, 2023
Filing Date:
October 05, 2022
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
G21F9/06; G21F9/08
Domestic Patent References:
| JP50031300A | ||||
| JP2016080508A | ||||
| JP2014092441A | ||||
| JP2004170278A | ||||
| JP2126993A |
Attorney, Agent or Firm:
Yasushi Matsunuma
Eisuke Ito
Hiroyuki Hashimoto
Ancient city Satoshi
Koichiro Kamada
Eisuke Ito
Hiroyuki Hashimoto
Ancient city Satoshi
Koichiro Kamada
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