Siemens Aktiengesellschaft

Areva Np Gmbh

Areva Gmbh

Ursula Hollwedel

Klaus Kuhnke

Konrad Bitter

Franz Ammann

Enkhtsetseg Batchuluun

A method to remove deposits containing magnetite and copper from a container, particularly from a steam generator of a nuclear power plant. In a first step, the container is treated using an alkaline cleaning solution containing a complexing agent forming a soluble complex with iron ions, a reducing agent, and an alkalizing agent. In a second step a further complexing agent forming a more stable complex with iron III ions than the complexing agent used in the first step and an oxidant are added to the cleaning solution of the first step present in the container.

Method for removing deposits containing magnetite and copper from containers in industrial and power plants

A method and a solution are provided for cleaning a container, in particular a boiler of a conventional power station. The container is degreased and pickled in one method step using an alkaline cleaning solution. A suitable cleaning solution includes, for example, an ammonium EDTA salt, hydrazine and a surfactant.

Method and cleaning solution for cleaning a container

Growing community of inventors

Schnaittach, Germany

Ursula Hollwedel