METHOD FOR REMOVING DEPOSITS CONTAINING MAGNETITE AND COPPERFROM CONTAINERS IN INDUSTRIAL AND POWER PLANTS

摘要

The invention relates to a method for removing deposits containing magnet ite and copper from a container, particularly from a steam generator of a nu clear power plant, wherein - in a first step the container is treated using an alkaline cleaning solution comprising a complexing agent forming a comple x soluble with iron ions, a reducing agent, and an alkalizing agent, and - i n a second step a further complexing agent forming a more stable complex wit h iron III ions than the complexing agent used in the first step and an oxid ant are added to the cleaning solution of the first step present in the cont ainer.