Are Underground Clay Disposal Conditions Favorable for Microbial Activity and Biocorrosion
作者： M. Libert , M. Kerber-Schütz , L. Esnault , O. Bildstein
DOI: 10.1016/J.PROEPS.2013.03.181
关键词:
摘要: Abstract The French concept for geological disposal of high-level radioactive waste is based on a multi-barrier system including metallic containers confined in claystone layer. main alteration vector water coming from the host rock and triggering corrosion components. Despite extreme conditions, microorganisms can adapt survive these environments. Anoxic radiolysis produce H2, which potentially represents an abundant energetic source microbial development, especially this type environment containing low amounts biodegradable organic matter. Moreover, formation Fe(III)-bearing products such as magnetite (Fe3O4) provide electron acceptors development. Therefore, biocorrosion studies are needed order to investigate activity hydrogenotrophic bacteria able reduce sulphates or Fe(III) iron oxides (passive layer). These help evaluating impacts long-term stability components involved disposal.
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