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US6716402: Dissolution and decontamination process

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Filing Information

Inventor(s) Jean-Michel Fulconis · Jacques Delagrange · Francis Dalard ·
Assignee(s) Commissariat a lEnergie Atomique ·
Attorney/Agent(s) Swiss Law Group ·
Primary Examiner Steven Bos ·
Application Number US10050915
Filing date 01/22/2002
Issue date 04/06/2004
Prior Publication Data
Predicted expiration date 09/15/2022
Patent term adjustment 236
U.S. Classifications 423/22  · 976/DIG.391  · 976/DIG.375  · 976/DIG.392  · 376/308  ·
International Classifications --
Kind CodeB2
International Classifications 423 22 · 376308 · 976DIG 375 · 976DIG 391 · 976DIG 392 ·
Related U.S. Application DataThis application claims priority under 35 U.S.C. §§119 and/or 365 to 01 0174 filed in France on Feb. 8, 2001; the entire content of which is hereby incorporated by reference.
Foreign Priority FR0101704 - 02/08/2001 ·
16 Claims, 2 Drawings


Abstract

The present invention concerns a process for dissolving ruthenium deposits that are present on a surface and a process for decontaminating the internal circuits of nuclear fuel reprocessing plants using the said dissolution process. The process according to the invention comprises bringing the said surface into contact with an aqueous solution of perruthenate, with the said aqueous solution having a pH equal to or greater than 12, so that the ruthenium is oxidised.

Independent Claims | See all claims (16)

  1. 1. Process for dissolving ruthenium deposits that are present on a surface, comprising bringing said surface into contact with an aqueous solution of perruthenate, having a pH equal to or greater than 12.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US2967209* GRUMMITT WILLIAM E Grummitt et al. Jan 1961
US3853980* COMMISSARIAT ENERGIE ATOMIQUE Berton et al. Dec 1974
US5248496 BASF Aktiengesellschaft Schuster et al. Sep 1993

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
EP424776*May 1991
EP0247933COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractre Scientifique Technique et IndustrielDec 1997
JP63242934*ISHIKAWAJIMA HARIMA HEAVY IND CO LTDOct 1988
JP63243232*ISHIKAWAJIMA HARIMA HEAVY IND CO LTDOct 1988
JP10272327NIPPON MUKI CO LTDOct 1998
* cited by examiner

Other Publications

Database WPI, Section Ch, Week 198846, Derwent Publications Ltd., London, GB; Class K07, AN 1988-327938, XP002181487, no month.

Referenced By

The current document is not referenced by other documents.