Title:
原子力施設の金属表面の除染方法
Document Type and Number:
Japanese Patent JP6752358
Kind Code:
B2
Abstract:
A method for decontaminating a metal surface exposed to radioactive liquid or gas during operation of a nuclear facility comprises an oxidation step wherein a metal oxide layer on the metal surface is contacted with an aqueous oxidation solution comprising a permanganate oxidant for converting chromium into a Cr(VI) compound and dissolving the Cr(VI) compound in the oxidation solution; and a first cleaning step wherein the oxidation solution containing the Cr(VI) compound is directly passed over an anion exchange material and the Cr(VI) compound is immobilized on the anion exchange material. The method provides for substantial savings of radioactive waste and produces chelate-free waste.
Inventors:
Louis Sempere-Verda
Jose Pedro Moreira de Amaral
Christian Topuf
Jose Pedro Moreira de Amaral
Christian Topuf
Application Number:
JP2019508196A
Publication Date:
September 09, 2020
Filing Date:
January 08, 2018
Export Citation:
Assignee:
Furamatom Gezel Shaft Mitt Beschlenktel Haftung
International Classes:
G21F9/28; C23G1/19; C23G1/20; G21F9/04; G21F9/06; G21F9/12
Domestic Patent References:
| JP60235099A |
Foreign References:
| US20140352717 |
Attorney, Agent or Firm:
Norihito Yamao
Haruhiko Ema
Haruhiko Ema