Microbial degradation of LLW under repository conditions- case TVO

Minna Vikman (Corresponding author), Kaisa Marjamaa, Merja Itävaara

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Abstract

In Finland major part of the low level radioactive waste (LLW) is composed of protective plastic
sheets, clothing, tools, and towels used during maintenance work. This miscellaneous maintenance
waste is compacted in steel drums and deposited 60‐110 meters below ground level. The Gas
Generation Experiment GGE has been established in 1997 to examine gas generation from LLW in
TVO's final disposal repository for operational LLW and ILW in Olkiluoto, Finland. Since 1999 gas
generation has been rather constant and released gas was mainly composed of methane. The results
obtained by qPCR also revealed that methanogens formed major part of the microbial population in
GGE. In addition to anaerobic degradation of organic matter there are also other processes that
influence the gas formation, such as corrosion of steel and sulphate reduction by bacteria.
Considerable heterogeneity in chemical conditions has been detected in different locations of GGE
which can be also seen as differences in microbiological activity and diversity.
Original languageEnglish
Title of host publicationMIND (the Microbiology In Nuclear waste Disposal) Project Annual Meeting 1. Extended Abstracts
Subtitle of host publicationBook of Abstracts
PublisherEuropean Union
Pages39-42
Publication statusPublished - 2016
EventMicrobiology In Nuclear waste Disposal, Project Annual Meeting 1 - Granada, Spain
Duration: 1 Apr 20162 Apr 2016

Conference

ConferenceMicrobiology In Nuclear waste Disposal, Project Annual Meeting 1
Abbreviated titleMIND
CountrySpain
CityGranada
Period1/04/162/04/16

Fingerprint

repository
radioactive waste
degradation
steel
gas
corrosion
methane
sulfate
organic matter
bacterium
experiment
chemical
clothing

Keywords

  • nuclear waste
  • LLW
  • biodegradability

Cite this

Vikman, M., Marjamaa, K., & Itävaara, M. (2016). Microbial degradation of LLW under repository conditions- case TVO. In MIND (the Microbiology In Nuclear waste Disposal) Project Annual Meeting 1. Extended Abstracts: Book of Abstracts (pp. 39-42). European Union.
Vikman, Minna ; Marjamaa, Kaisa ; Itävaara, Merja. / Microbial degradation of LLW under repository conditions- case TVO. MIND (the Microbiology In Nuclear waste Disposal) Project Annual Meeting 1. Extended Abstracts: Book of Abstracts. European Union, 2016. pp. 39-42
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abstract = "In Finland major part of the low level radioactive waste (LLW) is composed of protective plasticsheets, clothing, tools, and towels used during maintenance work. This miscellaneous maintenancewaste is compacted in steel drums and deposited 60‐110 meters below ground level. The GasGeneration Experiment GGE has been established in 1997 to examine gas generation from LLW inTVO's final disposal repository for operational LLW and ILW in Olkiluoto, Finland. Since 1999 gasgeneration has been rather constant and released gas was mainly composed of methane. The resultsobtained by qPCR also revealed that methanogens formed major part of the microbial population inGGE. In addition to anaerobic degradation of organic matter there are also other processes thatinfluence the gas formation, such as corrosion of steel and sulphate reduction by bacteria.Considerable heterogeneity in chemical conditions has been detected in different locations of GGEwhich can be also seen as differences in microbiological activity and diversity.",
keywords = "nuclear waste, LLW, biodegradability",
author = "Minna Vikman and Kaisa Marjamaa and Merja It{\"a}vaara",
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Vikman, M, Marjamaa, K & Itävaara, M 2016, Microbial degradation of LLW under repository conditions- case TVO. in MIND (the Microbiology In Nuclear waste Disposal) Project Annual Meeting 1. Extended Abstracts: Book of Abstracts. European Union, pp. 39-42, Microbiology In Nuclear waste Disposal, Project Annual Meeting 1, Granada, Spain, 1/04/16.

Microbial degradation of LLW under repository conditions- case TVO. / Vikman, Minna (Corresponding author); Marjamaa, Kaisa; Itävaara, Merja.

MIND (the Microbiology In Nuclear waste Disposal) Project Annual Meeting 1. Extended Abstracts: Book of Abstracts. European Union, 2016. p. 39-42.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

TY - CHAP

T1 - Microbial degradation of LLW under repository conditions- case TVO

AU - Vikman, Minna

AU - Marjamaa, Kaisa

AU - Itävaara, Merja

N1 - Project code: 102432

PY - 2016

Y1 - 2016

N2 - In Finland major part of the low level radioactive waste (LLW) is composed of protective plasticsheets, clothing, tools, and towels used during maintenance work. This miscellaneous maintenancewaste is compacted in steel drums and deposited 60‐110 meters below ground level. The GasGeneration Experiment GGE has been established in 1997 to examine gas generation from LLW inTVO's final disposal repository for operational LLW and ILW in Olkiluoto, Finland. Since 1999 gasgeneration has been rather constant and released gas was mainly composed of methane. The resultsobtained by qPCR also revealed that methanogens formed major part of the microbial population inGGE. In addition to anaerobic degradation of organic matter there are also other processes thatinfluence the gas formation, such as corrosion of steel and sulphate reduction by bacteria.Considerable heterogeneity in chemical conditions has been detected in different locations of GGEwhich can be also seen as differences in microbiological activity and diversity.

AB - In Finland major part of the low level radioactive waste (LLW) is composed of protective plasticsheets, clothing, tools, and towels used during maintenance work. This miscellaneous maintenancewaste is compacted in steel drums and deposited 60‐110 meters below ground level. The GasGeneration Experiment GGE has been established in 1997 to examine gas generation from LLW inTVO's final disposal repository for operational LLW and ILW in Olkiluoto, Finland. Since 1999 gasgeneration has been rather constant and released gas was mainly composed of methane. The resultsobtained by qPCR also revealed that methanogens formed major part of the microbial population inGGE. In addition to anaerobic degradation of organic matter there are also other processes thatinfluence the gas formation, such as corrosion of steel and sulphate reduction by bacteria.Considerable heterogeneity in chemical conditions has been detected in different locations of GGEwhich can be also seen as differences in microbiological activity and diversity.

KW - nuclear waste

KW - LLW

KW - biodegradability

M3 - Conference abstract in proceedings

SP - 39

EP - 42

BT - MIND (the Microbiology In Nuclear waste Disposal) Project Annual Meeting 1. Extended Abstracts

PB - European Union

ER -

Vikman M, Marjamaa K, Itävaara M. Microbial degradation of LLW under repository conditions- case TVO. In MIND (the Microbiology In Nuclear waste Disposal) Project Annual Meeting 1. Extended Abstracts: Book of Abstracts. European Union. 2016. p. 39-42