A Comparison of Different Natural Groundwaters from Repository Sites—Corrosivity, Chemistry and Microbial Community

Mervi Somervuori; Elisa Isotahdon; Maija Nuppunen-Puputti; Malin Bomberg; Leena Carpén; Pauliina Rajala

doi:10.3390/cmd2040032

A Comparison of Different Natural Groundwaters from Repository Sites—Corrosivity, Chemistry and Microbial Community

Mervi Somervuori (Corresponding Author), Elisa Isotahdon, Maija Nuppunen-Puputti, Malin Bomberg, Leena Carpén, Pauliina Rajala

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

In Finland, the repositories for low and intermediate-level radioactive waste (LLW and ILW) will be situated at three different geographical locations in about 60 to 100 m deep granite bedrock where the waste and 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 the three repository areas was analyzed in respect to chemistry and microbial community. 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 without microbes. The measurements show that corrosivity of the water and thus the steels’ performance differs depending on water origin. In addition, the groundwater differed remarkably in their chemical composition as well as abundance and diversity of microbial community between the sites. Consequently, the local environment has to be considered when evaluating the long-term evolution of disposal concepts.

Original language	English
Pages (from-to)	603–624
Number of pages	19
Journal	Corrosion and Materials Degradation
Volume	2
Issue number	4
DOIs	https://doi.org/10.3390/cmd2040032
Publication status	Published - 21 Oct 2021
MoE publication type	A1 Journal article-refereed

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title = "A Comparison of Different Natural Groundwaters from Repository Sites—Corrosivity, Chemistry and Microbial Community",

abstract = "In Finland, the repositories for low and intermediate-level radioactive waste (LLW and ILW) will be situated at three different geographical locations in about 60 to 100 m deep granite bedrock where the waste and 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 the three repository areas was analyzed in respect to chemistry and microbial community. 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 without microbes. The measurements show that corrosivity of the water and thus the steels{\textquoteright} performance differs depending on water origin. In addition, the groundwater differed remarkably in their chemical composition as well as abundance and diversity of microbial community between the sites. Consequently, the local environment has to be considered when evaluating the long-term evolution of disposal concepts.",

author = "Mervi Somervuori and Elisa Isotahdon and Maija Nuppunen-Puputti and Malin Bomberg and Leena Carp{\'e}n and Pauliina Rajala",

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month = oct,

day = "21",

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language = "English",

volume = "2",

pages = "603–624",

journal = "Corrosion and Materials Degradation",

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A Comparison of Different Natural Groundwaters from Repository Sites—Corrosivity, Chemistry and Microbial Community. / Somervuori, Mervi (Corresponding Author); Isotahdon, Elisa; Nuppunen-Puputti, Maija et al.
In: Corrosion and Materials Degradation, Vol. 2, No. 4, 21.10.2021, p. 603–624.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - A Comparison of Different Natural Groundwaters from Repository Sites—Corrosivity, Chemistry and Microbial Community

AU - Somervuori, Mervi

AU - Isotahdon, Elisa

AU - Nuppunen-Puputti, Maija

AU - Bomberg, Malin

AU - Carpén, Leena

AU - Rajala, Pauliina

PY - 2021/10/21

Y1 - 2021/10/21

N2 - In Finland, the repositories for low and intermediate-level radioactive waste (LLW and ILW) will be situated at three different geographical locations in about 60 to 100 m deep granite bedrock where the waste and 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 the three repository areas was analyzed in respect to chemistry and microbial community. 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 without microbes. The measurements show that corrosivity of the water and thus the steels’ performance differs depending on water origin. In addition, the groundwater differed remarkably in their chemical composition as well as abundance and diversity of microbial community between the sites. Consequently, the local environment has to be considered when evaluating the long-term evolution of disposal concepts.

AB - In Finland, the repositories for low and intermediate-level radioactive waste (LLW and ILW) will be situated at three different geographical locations in about 60 to 100 m deep granite bedrock where the waste and 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 the three repository areas was analyzed in respect to chemistry and microbial community. 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 without microbes. The measurements show that corrosivity of the water and thus the steels’ performance differs depending on water origin. In addition, the groundwater differed remarkably in their chemical composition as well as abundance and diversity of microbial community between the sites. Consequently, the local environment has to be considered when evaluating the long-term evolution of disposal concepts.

U2 - 10.3390/cmd2040032

DO - 10.3390/cmd2040032

M3 - Article

SN - 2624-5558

VL - 2

SP - 603

EP - 624

JO - Corrosion and Materials Degradation

JF - Corrosion and Materials Degradation

IS - 4

ER -

A Comparison of Different Natural Groundwaters from Repository Sites—Corrosivity, Chemistry and Microbial Community

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