Corrosion susceptibility of steel drums to be used as containers for intermediate level nuclear waste

Abstract

Abstract. The present work is a study of the corrosion susceptibility of steel drums in contact with cemented ion-exchange resins contaminated with different types and concentrations of aggressive species. A special type of specimen was manufactured to simulate the cemented ion-exchange resins in the drum. The evolution of the corrosion potential and the corrosion rate of the steel, as well as the electrical resistivity of the matrix were monitored over a time period of 900 days. The aggressive species studied were chloride ions (the main ionic species of concern) and sulphate ions (produced during radiolysis of the cationic exchange-resins after cementation). The work was complemented with an analysis of the corrosion products formed on the steel in each condition, as well as the morphology of the corrosion products. When applying the results obtained in the present work to estimate the corrosion depth of the steel drums containing the cemented radioactive waste after a period of 300 years (foreseen durability of the Intermediate Level Radioactive Waste facility in Argentina) , it is found that in the most unfavourable case (high chloride contamination), the corrosion penetration will be considerably lower than the thickness of the wall of the steel drums.

Potenciales aplicaciones tecnológicas de heterociclos nitrogenados y productos naturales: síntesis, inhibición de la corrosión de metales y generación de aniones radicales estables

“…Los residuos nucleares se inmovilizan en estructuras de hormigón armado y son depositados en contenedores de aceros de 200 l. Los científicos e ingenieros especializados en corrosión están lidiando con el problema de predecir la resistencia a la corrosión de los contenedores durante largos periodos de tiempo, a elevadas temperaturas y en presencia de iones cloruro. [16], [17].…”