TAILIEUCHUNG - Growth of micrometric oxide layers to explore laser decontamination of metallic surfaces

In this paper we propose a method for the creation of oxide layers on stainless steel 304L with europium (Eu) as contaminant. This technique consists in spraying an Eu-solution on stainless steel samples. | Growth of micrometric oxide layers to explore laser decontamination of metallic surfaces EPJ Nuclear Sci. Technol. 3 30 2017 Nuclear Sciences L. Carvalho et al. published by EDP Sciences 2017 amp Technologies DOI epjn 2017027 Available online at https REGULAR ARTICLE Growth of micrometric oxide layers to explore laser decontamination of metallic surfaces Luisa Carvalho Wilfried Pacquentin Michel Tabarant Hicham Maskrot and Alexandre Semerok Den Service d Etudes Analytiques et de Réactivité des Surfaces SEARS CEA Université Paris-Saclay 91191 Gif sur Yvette France Received 10 July 2017 Received in final form 9 October 2017 Accepted 10 October 2017 Abstract. The nuclear industry produces a wide range of radioactive waste in terms of hazard level contaminants and material. For metallic equipment like steam generators the radioactivity is mainly located in the oxide surface. In order to study and develop safe techniques for dismantling and for decontamination it is important to have access to oxide layers with a representative distribution of non-radioactive contaminants. In this paper we propose a method for the creation of oxide layers on stainless steel 304L with europium Eu as contaminant. This technique consists in spraying an Eu-solution on stainless steel samples. The specimens are firstly treated with a pulsed nanosecond laser after which the steel samples are placed in a 873 K furnace for various durations in order to grow an oxide layer. The oxide structure and in-depth distribution of Eu in the oxide layer were analyzed by scanning electron microscopy coupled to an energy-dispersive X-ray microanalyzer as well as by glow discharge optical emission or mass spectrometry. The oxide layers were grown to thicknesses in the range of 200 nm mm depending on the laser treatment parameters and the heating duration. These contaminated oxides had a duplex structure with a mean concentration of the order of 6 1016 atoms cm2 15 mg cm2 of europium

• Năng lượng
• Stainless steel 304L
• Stainless steel samples
• Micrometric oxide layers
• High Efficiency Particulate Air
• Non radioactive contaminant