Using field analogue soil column experiments to quantify radon-222 gas migration and transport through soils and bedrock of Halifax, Nova Scotia, Canada

OʼBrien, Kelsey; Risk, D. A.; Rainham, Daniel; O'Beirne-Ryan, A. M.

doi:10.1007/s12665-014-3168-y

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…Hydrogen is expected to be the dominant gas generated in a deep geological repository [132,133] and could also potentially act as a carrier for radioactive gaseous species (e.g., H-3, C-14, Rn-222, etc. [134,135]). The formation of H 2 by anaerobic corrosion of metals may further contribute to gas generation (such as CH 4 , H 2 S or CO 2 ), as H 2 can be used as an electron donor in microbial processes [136].…”

Section: Effect Of Oxygen Gasses and Nutrients On The Microorganismsmentioning

confidence: 99%

Insights into the Impact of Physicochemical and Microbiological Parameters on the Safety Performance of Deep Geological Repositories

Morales-Hidalgo,

Povedano-Priego,

Martinez-Moreno

et al. 2024

Microorganisms

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Currently, the production of radioactive waste from nuclear industries is increasing, leading to the development of reliable containment strategies. The deep geological repository (DGR) concept has emerged as a suitable storage solution, involving the underground emplacement of nuclear waste within stable geological formations. Bentonite clay, known for its exceptional properties, serves as a critical artificial barrier in the DGR system. Recent studies have suggested the stability of bentonite within DGR relevant conditions, indicating its potential to enhance the long-term safety performance of the repository. On the other hand, due to its high resistance to corrosion, copper is one of the most studied reference materials for canisters. This review provides a comprehensive perspective on the influence of nuclear waste conditions on the characteristics and properties of DGR engineered barriers. This paper outlines how evolving physico-chemical parameters (e.g., temperature, radiation) in a nuclear repository may impact these barriers over the lifespan of a repository and emphasizes the significance of understanding the impact of microbial processes, especially in the event of radionuclide leakage (e.g., U, Se) or canister corrosion. Therefore, this review aims to address the long-term safety of future DGRs, which is critical given the complexity of such future systems.

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Section: Effect Of Oxygen Gasses and Nutrients On The Microorganismsmentioning

confidence: 99%

Insights into the Impact of Physicochemical and Microbiological Parameters on the Safety Performance of Deep Geological Repositories

Morales-Hidalgo,

Povedano-Priego,

Martinez-Moreno

et al. 2024

Microorganisms

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“…Thus, once gases are produced, environmental factors, which control the cave atmosphere, determine the gaseous accumulation in the confined atmosphere. The porous system of the rocks and soils and the presence of water define the diffusion rates of both gases [22][23][24][25]. Diffusion is among the mechanisms responsible for gas migration and accumulation in an underground environment, and it directly depends on the physical properties of the porous materials [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Insights on Climate-Driven Fluctuations of Cave ²²²Rn and CO₂ Concentrations Using Statistical and Wavelet Analyses

et al. 2020

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Understanding the fluctuations in cave air concentrations and their climatic control is substantial not only to preserve the quality of indoor atmospheres but also to avoid the risk related to the presence of hazardous substances. In this study, we investigated the most influential factors affecting 222Rn and CO2 concentrations, the nature of their dynamics, and their coupling with climatic variations. For this purpose, we combined a set of mathematical methods that included a statistical and wavelet analysis of a 6-year time series in Rull Cave (Spain). Generally, the 222Rn and CO2 dynamic in cave air showed similar patterns. However, the obtained results show that these gases have a different frequency response. Thus, the annual component of 222Rn and CO2 is controlled by the relationship between external and internal temperatures. At low frequencies, both gases are affected by the same variables when the cave atmosphere reaches a minimum concentration. However, when the cave atmosphere is isolated from the outdoors, 222Rn and CO2 behave differently and disturbance caused by the visitors is evidenced in terms of the CO2 concentration; the latter observation was confirmed by the wavelet analysis at high frequencies. In contrast, the 222Rn concentration shows important variations following rainfall, which was weakly identified in the CO2 concentration.

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Gas transport modelling at different spatial scales of a geological repository in clay host rock

et al. 2019

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Using field analogue soil column experiments to quantify radon-222 gas migration and transport through soils and bedrock of Halifax, Nova Scotia, Canada

Cited by 4 publications

References 27 publications

Insights into the Impact of Physicochemical and Microbiological Parameters on the Safety Performance of Deep Geological Repositories

Insights into the Impact of Physicochemical and Microbiological Parameters on the Safety Performance of Deep Geological Repositories

Insights on Climate-Driven Fluctuations of Cave ²²²Rn and CO₂ Concentrations Using Statistical and Wavelet Analyses

Gas transport modelling at different spatial scales of a geological repository in clay host rock

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Using field analogue soil column experiments to quantify radon-222 gas migration and transport through soils and bedrock of Halifax, Nova Scotia, Canada

Cited by 4 publications

References 27 publications

Insights into the Impact of Physicochemical and Microbiological Parameters on the Safety Performance of Deep Geological Repositories

Insights into the Impact of Physicochemical and Microbiological Parameters on the Safety Performance of Deep Geological Repositories

Insights on Climate-Driven Fluctuations of Cave 222Rn and CO2 Concentrations Using Statistical and Wavelet Analyses

Gas transport modelling at different spatial scales of a geological repository in clay host rock

Contact Info

Product

Resources

About

Insights on Climate-Driven Fluctuations of Cave ²²²Rn and CO₂ Concentrations Using Statistical and Wavelet Analyses