Abstract
BWR and PWR cemented matrices to confine low and medium simulated liquid radioactive wastes have been submitted to the leaching process in de-ionized water at 20oC and 40oC, to obtain the medium leachability index (L) and the effective diffusion coefficient (D e ) of different ions. Otherwise, it has been studied the associated expansion of the backfilling mortar of the concrete containers of the Spanish repository of these wastes, due to a possible attack of the sulfate ions coming from the cemented matrices.
Highlights
BWR and PWR cemented matrices to confine low and medium simulated liquid radioactive wastes have been submitted to the leaching process in de-ionized water at 20"C and 40"C, to obtain the medium leachability index (L) and the effective diffusion coefficient
In the stabilization/solidification systems, for the immobilization and solidification of low and medium radioactive wastes (LRWand MRW), different kinds of cementitious materials have been employed; the ordinary Portland cement (OPC) is the most frequently used [2, 3, 4], because it presents a lot of advantages
En el caso de un contenedor de almacenamiento, la fuente de iones sulfato, puede ser del propio cemento o bien de las matrices de inmovilización, más concretamente de las sales disueltas en los concentrados de evaporador que contienen dichas matrices, pqr lo que se ha elegido una matriz tipo BWR con una alta concentración en iones sulfato, para hacer más drástico el ensayo. Second part, it has been studied the mechanism of attack of the sulfate ions coming from the matrices to the backfilling mortar, as well as, the associated expansion
Summary
BWR and PWR cemented matrices to confine low and medium simulated liquid radioactive wastes have been submitted to the leaching process in de-ionized water at 20"C and 40"C, to obtain the medium leachability index (L) and the effective diffusion coefficient It has been studied the associated expansion of the backfilling mortar of the concrete containers of the Spanish repository of these wastes, due to a possible attack of the sulfate ions coming from the cemented matrices
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