Corrosivity of Different Natural Groundwaters from Repository Sites †
by
, , ,
Mervi Somervuori
*
,
Elisa Isotahdon
,
Maija Nuppunen-Puputti
,
Malin Bomberg
,
Leena Carpén
and
Pauliina Rajala
VTT Technical Research Centre of Finland Ltd., 02150 Espoo, Finland
*
Author to whom correspondence should be addressed.
†
Presented at the First Corrosion and Materials Degradation Web Conference, 17–19 May 2021; Available online: https://cmdwc2021.sciforum.net/ .
Mater. Proc. 2021, 6(1), 33; https://doi.org/10.3390/CMDWC2021-10064
Published: 17 May 2021
(This article belongs to the Proceedings of The 1st Corrosion and Materials Degradation Web Conference)
Abstract
:In Finland, the repositories for low- and intermediate-level waste (LLW and ILW) are situated in three different geographical locations in deep granite bedrock, where waste containers can be subjected to anoxic groundwater containing microbes. The composition of groundwater varies in terms of chemistry and microbial activity in different locations. In this study, groundwater from three repository areas was analyzed with regard to chemistry and microbial community. The corrosion tendency of three steel grades, carbon steel AISI/SAE 1005 and stainless steels AISI 304 and 316L, was studied in these groundwater environments using electrochemical methods. As a reference, measurements were also performed in simulated groundwater that did not contain microbes. The measurements show that the corrosivity of the water, and thus, the steels’ performance, differed depending on its location of origin. Additionally, the groundwater differed remarkably in their chemical composition as well as the abundance and diversity of the microbial community within them. Consequently, the local environment has to be considered when evaluating the long-term safety of the disposal of nuclear waste.
Supplementary Materials
The conference presentation file is available at https://www.mdpi.com/article/10.3390/CMDWC2021-10064/s1.
Funding
Finnish Research Programme on Nuclear Waste Management 2019–2022 (KYT2022 Project TERKOR) and VTT Technical Research Centre of Finland Ltd.
Institutional Review Board Statement
Not applicable.
Informed Consent Statement
Not applicable.
Acknowledgments
The help of the staff of the Finnish nuclear power plants during the ground- water samplings is gratefully acknowledged. The authors thank the skillful assistance of Tuomo Kinnunen, Taru Lehtikuusi and Seija Kivi in the experimental work as well as Mirva Pyrhönen for the microbiological analyses.
Conflicts of Interest
The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
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MDPI and ACS Style
Somervuori, M.; Isotahdon, E.; Nuppunen-Puputti, M.; Bomberg, M.; Carpén, L.; Rajala, P. Corrosivity of Different Natural Groundwaters from Repository Sites. Mater. Proc. 2021, 6, 33. https://doi.org/10.3390/CMDWC2021-10064
AMA Style
Somervuori M, Isotahdon E, Nuppunen-Puputti M, Bomberg M, Carpén L, Rajala P. Corrosivity of Different Natural Groundwaters from Repository Sites. Materials Proceedings. 2021; 6(1):33. https://doi.org/10.3390/CMDWC2021-10064
Chicago/Turabian StyleSomervuori, Mervi, Elisa Isotahdon, Maija Nuppunen-Puputti, Malin Bomberg, Leena Carpén, and Pauliina Rajala. 2021. "Corrosivity of Different Natural Groundwaters from Repository Sites" Materials Proceedings 6, no. 1: 33. https://doi.org/10.3390/CMDWC2021-10064
