Microbiological studies related to the geological disposal of radioactive waste have been conducted at the Mont Terri rock laboratory in Opalinus Clay, a potential host rock for a deep geologic repository, since 2002. The metabolic potential of microorganisms and their response to excavation-induced effects have been investigated in undisturbed and disturbed claystone cores and in pore- (borehole) water. Results from nearly 15 years of research at the Mont Terri rock laboratory have shown that microorganisms can potentially affect the environment of a repository by influencing redox conditions, metal corrosion and gas production and consumption under favourable conditions. However, the activity of microorganisms in undisturbed Opalinus Clay is limited by the very low porosity, the low water activity, and the largely recalcitrant nature of organic matter in the claystone formation. The presence of microorganisms in numerous experiments at the Mont Terri rock laboratory has suggested that excavation activities and perturbation of the host rock combined with additional contamination during the installation of experiments in boreholes create favourable conditions for microbial activity by providing increased space, water and substrates. Thus effects resulting from microbial activity might be expected in the proximity of a geological repository i.e., in the excavation damaged zone, the engineered barriers, and first containments (the containers).

中文翻译：

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在蒙特利（Mont Terri）岩石实验室（瑞士）的Opalinus Clay中进行了15年的微生物研究

自2002年以来，已经在Opalinus Clay的Mont Terri岩石实验室进行了与放射性废物地质处置有关的微生物学研究，该实验室是深层地质库的潜在宿主岩石。微生物的代谢潜能及其对开挖诱发效应的反应在未扰动和扰动的粘土岩心以及孔隙（钻孔）水中进行了研究。蒙特特里岩石实验室近15年的研究结果表明，微生物可以通过影响氧化还原条件，金属腐蚀以及在有利条件下产生和消耗气体来潜在地影响储存环境。但是，不受干扰的蛋白石粘土中的微生物活性受到孔隙率极低，水分活度低，以及粘土岩层中有机物的主要顽固性。Mont Terri岩石实验室的许多实验中都发现了微生物，这表明，在井眼中进行实验时，基岩的开挖活动和扰动加上额外的污染，通过增加空间，水和底物，为微生物活动创造了有利条件。因此，在微生物处置库附近，即在开挖损坏的区域，工程屏障和第一围栏（容器）中，可能会预期到由微生物活动引起的影响。Mont Terri岩石实验室的许多实验中都发现了微生物，这表明，在井眼中进行实验时，基岩的开挖活动和扰动加上额外的污染，通过增加空间，水和底物，为微生物活动创造了有利条件。因此，在微生物处置库附近，即在开挖损坏的区域，工程屏障和第一围栏（容器）中，可能会预期到由微生物活动引起的影响。Mont Terri岩石实验室的许多实验中都发现了微生物，这表明，在井眼中进行实验时，基岩的开挖活动和扰动加上额外的污染，通过增加空间，水和底物，为微生物活动创造了有利条件。因此，在微生物处置库附近，即在开挖损坏的区域，工程屏障和第一围栏（容器）中，可能会预期到由微生物活动引起的影响。