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Potential influence of microorganisms on the corrosion of carbon steel in the French high‐ and intermediate‐level long‐lived radioactive waste disposal context
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-07-23 , DOI: 10.1002/maco.202011779
Erwan Diler 1 , Vanessa Leblanc 2 , Hervé Gueuné 2 , Nicolas Larché 1 , Valerie Deydier 3 , Yannick Linard 3 , Didier Crusset 3 , Dominique Thierry 1
Affiliation  

In the context of the high‐level radioactive waste disposal CIGEO, the corrosion rate due to microbially influenced corrosion (MIC) has to be evaluated. In France, it is envisaged to dispose of high‐ and intermediate‐level long‐lived radioactive waste at a depth of 500 m in a deep geological disposal, drilled in the Callovo‐Oxfordian claystone (Cox) formation. To do so, a carbon steel casing will be inserted inside disposal cells, which are horizontal tunnels drilled in the Cox. A specific cement grout will be injected between the carbon steel casing and the claystone. A study was conducted to evaluate the possibility of MIC on carbon steel in the foreseeable high radioactive waste disposal. The corrosiveness of various environments was investigated at 50°C and 80°C with or without microorganisms enriched from samples of Andra's underground research laboratory. The monitoring of corrosion during the experiments was ensured using gravimetric method and real‐time corrosion monitoring using sensors based on the measurements of the electrical resistance. The corrosion data were completed with microbiological analyses including cultural and molecular characterizations.

中文翻译:

在法国高中级中长期放射性废物处置环境中,微生物对碳钢腐蚀的潜在影响

在高放射性废物处置CIGEO的背景下,必须评估由于微生物影响的腐蚀(MIC)而引起的腐蚀速率。在法国,设想将深层地质处置中的高中长期中长期放射性废物处置在500 m的深度,并在卡洛沃-牛津粘土岩(Cox)层中进行钻探。为此,将碳钢套管插入处置池内,处置池是在Cox中钻出的水平隧道。在碳钢套管和粘土岩之间将注入特定的水泥浆。进行了一项研究,以评估可预见的高放射性废物处置中碳钢上MIC的可能性。在50℃和80℃下,无论有无微生物都从Andra'样品中富集,研究了各种环境的腐蚀性 的地下研究实验室。使用重量法确保了对实验过程中腐蚀的监测,并基于电阻的测量结果,使用传感器进行了实时腐蚀监测。腐蚀数据通过微生物学分析(包括文化和分子表征)完成。
更新日期:2020-07-23
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