The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2025
Filed:
Mar. 09, 2021
Hitachi-ge Nuclear Energy, Ltd., Hitachi, JP;
Takashi Oohira, Hitachi, JP;
Satoshi Oouchi, Hitachi, JP;
Motohiro Aizawa, Hitachi, JP;
Nobuyuki Ota, Hitachi, JP;
Hideyuki Hosokawa, Tokyo, JP;
Ryo Hamada, Tokyo, JP;
Hiroo Yoshikawa, Osaka, JP;
Naobumi Tsubokawa, Osaka, JP;
Masahiko Kazama, Osaka, JP;
Hitachi-GE Nuclear Energy, Ltd., Hitachi, JP;
Abstract
Provided are a chemical decontamination method and a chemical decontamination apparatus capable of preventing deterioration of a metal ion exchange resin and performing decontamination at a low cost in a short time. The chemical decontamination method of the invention includes: a reduction decontamination step of supplying a reduction decontamination solution to a decontamination target portion and performing reduction decontamination on a surface of a member constituting the decontamination target portion; a hydrogen peroxide decomposition step of decomposing hydrogen peroxide contained in the reduction decontamination solution after the reduction decontamination step; and a metal ion removing step of removing a metal ion contained in the reduction decontamination solution after the hydrogen peroxide decomposition step.