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:
Dec. 06, 2005
Filed:
Dec. 04, 2001
Makoto Nagase, Mito, JP;
Naohito Uetake, Hitachinaka, JP;
Kazushige Ishida, Hitachi, JP;
Fumito Nakamura, Mito, JP;
Kazumi Anazawa, Hitachi, JP;
Tadashi Tamagawa, Ebina, JP;
Hiroo Yoshikawa, Sakai, JP;
Makoto Nagase, Mito, JP;
Naohito Uetake, Hitachinaka, JP;
Kazushige Ishida, Hitachi, JP;
Fumito Nakamura, Mito, JP;
Kazumi Anazawa, Hitachi, JP;
Tadashi Tamagawa, Ebina, JP;
Hiroo Yoshikawa, Sakai, JP;
Hitachi, Ltd., Tokyo, JP;
Kurita Engineering Co., Ltd., Osaka, JP;
Abstract
In a chemical decontamination method of chemically decontaminating radioactive nuclides from a metallic material, oxalic acid and hydrazine are injected as a reductive decontaminating agent into water that is in contact with the metallic material. Injection of the hydrazine is stopped after a cation resin arranged in a circulation line connected to the metallic material breaks, and at least the oxalic acid and the hydrazine in the reductive decontaminating agent are decomposed using a decomposing catalyst.