Patent · US Active

Method for decontaminating surfaces of nuclear plants which have been contaminated with alpha emitters

US8702868B2 · kind B2 · utility

0Cited by

6References

10Claims

0Family size

Assignee

AREVA GMBH · US

Inventors

Rainer Gassen · Bad Mergentheim, DE
Christoph Stiepani · Bad Mergentheim, DE
Horst-Otto Bertholdt · Nuremberg, DE
Bertram Zeiler · Erlangen, DE

Key dates

Filing date	May 27, 2009
Grant date	Apr 22, 2014
Priority date	—
Expiry date	Aug 11, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG21F9/28
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for decontaminating nuclear plant surfaces, which have been contaminated with alpha emitters, is carried out subsequently to a decontamination process which is aimed at the removal of oxide layers. The surfaces are treated with an aqueous solution which contains a cationic or zwitterionic surfactant and oxalic acid. At least a part of the solution, after having acted on a surface, is conducted across an ion exchanger.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.