Universidad Politécnica de Valencia Institute of Energetic Engineering Department of Nuclear and Chemical Engineering EXPERIMENTAL CHARACTERIZATION OF AEROSOL RETENTION IN THE BREAK STAGE OF A DRY STEAM GENERATOR IN SGTR SEQUENCES Ph. D. Thesis Presented by: Francisco Javier Sánchez Velasco Supervisors: Dr. Luis Enrique Herranz Puebla Dr. José Luis Muñoz- Cobo González