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:
Jan. 14, 2025
Filed:
Sep. 20, 2021
Hitachi-ge Nuclear Energy, Ltd., Ibaraki, JP;
Takashi Oohira, Hitachi, JP;
Shintaro Yanagisawa, Hitachi, JP;
Satoshi Oouchi, Hitachi, JP;
Nobuyuki Ota, Hitachi, JP;
Ryo Hamada, Tokyo, JP;
Hideyuki Hosokawa, Tokyo, JP;
Hitachi-GE Nuclear Energy, Ltd., Ibaraki, JP;
Abstract
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.