Resumen de Predictive Acid Chemical Cleaning Operation (PACCO©) an innovative method to remove iron oxide deposits in the secondary side of Steam Generators (SG)
Steam Generators (SG) usually present important deposit loading and Tube Support Blockage, resulting from Secondary Side corrosion products. These phenomena modify SG behavior which can lead to safety, heat Exchange performance and lifetime problems.
In this context, a Chemical Cleaning Process (PACCO) was designed by GDES to solve the issue.
After almost two years of intensive lab tests , pilot simulation and mock-ups , the chemical process was finally qualified by EDF.
The aim of the work was firstly the development in laboratory of a chemical process that could eliminate partially the deposit loading, respecting the integrity of materials and gas emission limits. Secondly, the objective was the design and the implementation of the process on-site. The process has been applied successfully in 6 SG in Dampierre 1 and 2 nuclear power plants in France.
