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Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage

Mar Morales-Hidalgo Orcid Logo, Cristina Povedano-Priego Orcid Logo, Marcos F. Martinez-Moreno Orcid Logo, Adam Mumford, Kateřina Černá Orcid Logo, Yon Ju-Nam Orcid Logo, Jesus Ojeda Ledo Orcid Logo, Ana María Fernández, Ursula Alonso Orcid Logo, Fadwa Jroundi, Mohamed L. Merroun Orcid Logo

Corrosion Science, Volume: 258, Start page: 113443

Swansea University Authors: Adam Mumford, Yon Ju-Nam Orcid Logo, Jesus Ojeda Ledo Orcid Logo

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DOI (Published version): 10.1016/j.corsci.2025.113443

Abstract

Ensuring the integrity of barriers in geological disposal facilities (GDFs) is crucial for the long term storage of radioactive waste. Copper is considered as a promising canister material due to its corrosion resistance. This study examines the combined effects of external gamma radiation (14 and 2...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: Elsevier BV 2026
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URI: https://cronfa.swan.ac.uk/Record/cronfa70764
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spelling 2025-11-21T11:37:46.8415152 v2 70764 2025-10-23 Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage 950f680b2dfca0e78d8dd229be5babd7 Adam Mumford Adam Mumford true false b219fdfea246d96dfc9c4eecfd60f2a6 0000-0003-2972-8073 Yon Ju-Nam Yon Ju-Nam true false 4c1c9800dffa623353dff0ab1271be64 0000-0002-2046-1010 Jesus Ojeda Ledo Jesus Ojeda Ledo true false 2025-10-23 Ensuring the integrity of barriers in geological disposal facilities (GDFs) is crucial for the long term storage of radioactive waste. Copper is considered as a promising canister material due to its corrosion resistance. This study examines the combined effects of external gamma radiation (14 and 28 kGy) and sulfate-reducing bacteria (SRB) on copper corrosion in highly compacted FEBEX bentonite. Results showed that gamma radiation significantly reduces SRB viability, suggesting that these bacteria are likely to remain inactive during the early centuries of GDF operation, when radiation is at its highest level. Microscopic and spectroscopic analyses identified copper oxides, particularly CuO, as the main corrosion products. Gamma radiation was found to delay microbial influenced corrosion by altering the microbial community structure and promoting salt precipitation, including copper sulfates. SRB facilitated the formation of biogenic copper sulfides in unirradiated or those minimally affected by radiation. These findings provide valuable insights into the role of SRB in copper corrosion, broadening our understanding of long-term GDF safety. Journal Article Corrosion Science 258 113443 Elsevier BV 0010-938X geological disposal facility, deep geological repository, microbially influenced corrosion, spectroscopic characterization, microbial activity, nuclear waste repository 1 1 2026 2026-01-01 10.1016/j.corsci.2025.113443 COLLEGE NANME COLLEGE CODE Swansea University Another institution paid the OA fee Ministerio de Ciencia e Innovación - Grant numbers: PID2022-138402NB-C21, PID2022–138402NB-C22; Gobierno de España Ministerio de Universidades - Grant numbers: FPU20/00583; Horizon 2020 - Grant numbers: N° 847593 (EURAD-1), N° 101166718 (EURAD-2), EURAD Mobility Programme; UK Engineering and Physical Sciences Research Council (EPSRC)- Grant number: 2748843 2025-11-21T11:37:46.8415152 2025-10-23T20:01:08.8535574 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Mar Morales-Hidalgo 0000-0002-4034-6212 1 Cristina Povedano-Priego 0000-0001-9859-7666 2 Marcos F. Martinez-Moreno 0000-0002-6808-1922 3 Adam Mumford 4 Kateřina Černá 0000-0003-3351-6372 5 Yon Ju-Nam 0000-0003-2972-8073 6 Jesus Ojeda Ledo 0000-0002-2046-1010 7 Ana María Fernández 8 Ursula Alonso 0000-0002-2668-4725 9 Fadwa Jroundi 10 Mohamed L. Merroun 0000-0003-4553-5976 11 70764__35503__6e8b4b90e22c45cdb5317e60ca46ba42.pdf 1-s2.0-S0010938X25007735-main.pdf 2025-10-30T12:21:46.0379040 Output 14131545 application/pdf Version of Record true © 2025 The Authors. This is an open access article under the CC BY license. true eng http://creativecommons.org/licenses/by/4.0/
title Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage
spellingShingle Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage
Adam Mumford
Yon Ju-Nam
Jesus Ojeda Ledo
title_short Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage
title_full Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage
title_fullStr Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage
title_full_unstemmed Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage
title_sort Assessing the combined effect of gamma radiation and sulfate-reducing bacteria on copper corrosion for deep nuclear waste storage
author_id_str_mv 950f680b2dfca0e78d8dd229be5babd7
b219fdfea246d96dfc9c4eecfd60f2a6
4c1c9800dffa623353dff0ab1271be64
author_id_fullname_str_mv 950f680b2dfca0e78d8dd229be5babd7_***_Adam Mumford
b219fdfea246d96dfc9c4eecfd60f2a6_***_Yon Ju-Nam
4c1c9800dffa623353dff0ab1271be64_***_Jesus Ojeda Ledo
author Adam Mumford
Yon Ju-Nam
Jesus Ojeda Ledo
author2 Mar Morales-Hidalgo
Cristina Povedano-Priego
Marcos F. Martinez-Moreno
Adam Mumford
Kateřina Černá
Yon Ju-Nam
Jesus Ojeda Ledo
Ana María Fernández
Ursula Alonso
Fadwa Jroundi
Mohamed L. Merroun
format Journal article
container_title Corrosion Science
container_volume 258
container_start_page 113443
publishDate 2026
institution Swansea University
issn 0010-938X
doi_str_mv 10.1016/j.corsci.2025.113443
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description Ensuring the integrity of barriers in geological disposal facilities (GDFs) is crucial for the long term storage of radioactive waste. Copper is considered as a promising canister material due to its corrosion resistance. This study examines the combined effects of external gamma radiation (14 and 28 kGy) and sulfate-reducing bacteria (SRB) on copper corrosion in highly compacted FEBEX bentonite. Results showed that gamma radiation significantly reduces SRB viability, suggesting that these bacteria are likely to remain inactive during the early centuries of GDF operation, when radiation is at its highest level. Microscopic and spectroscopic analyses identified copper oxides, particularly CuO, as the main corrosion products. Gamma radiation was found to delay microbial influenced corrosion by altering the microbial community structure and promoting salt precipitation, including copper sulfates. SRB facilitated the formation of biogenic copper sulfides in unirradiated or those minimally affected by radiation. These findings provide valuable insights into the role of SRB in copper corrosion, broadening our understanding of long-term GDF safety.
published_date 2026-01-01T05:33:41Z
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score 11.096068

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