Seok Yoon
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View article: Advancements in Long-term Safety Evaluation Technology for Engineered Barrier System (EBS): A Comprehensive Review of Korea’s High-Level Waste Disposal R&D Program
Advancements in Long-term Safety Evaluation Technology for Engineered Barrier System (EBS): A Comprehensive Review of Korea’s High-Level Waste Disposal R&D Program Open
Korea has officially initiated the development of an underground research laboratory (URL) at a depth of 500 m to facilitate a full-scale demonstration of high-level radioactive waste disposal technology. With the establishment of the URL,…
View article: Assessment of thermal-hydraulic-mechanical-chemical (THMC) performances of Ca-type bentonite-graphite mixtures as buffer materials for a high-level radioactive waste repository
Assessment of thermal-hydraulic-mechanical-chemical (THMC) performances of Ca-type bentonite-graphite mixtures as buffer materials for a high-level radioactive waste repository Open
The bentonite buffer material is the most important element of the engineered barrier system (EBS) used to dispose of high-level radioactive waste. Therefore, there are functional criteria or performance targets for the bentonite buffer ma…
View article: Effects of specimen size and loading rate on the mechanical property of Bentonil-WRK bentonite for engineered barrier system
Effects of specimen size and loading rate on the mechanical property of Bentonil-WRK bentonite for engineered barrier system Open
This study aims to investigate the effects of specimen size and loading rate on the mechanical property of Bentonil-WRK bentonite buffer material for engineered barrier system. Highly instrumented unconfined compressive strength tests were…
View article: Corrosive behavior of copper canisters under air and aerobic groundwater at early stages of deep geological disposal
Corrosive behavior of copper canisters under air and aerobic groundwater at early stages of deep geological disposal Open
Copper oxidation at low temperatures below 140 °C and its effects on corrosive behavior in aerobic groundwater are investigated to estimate the intactness of canisters at early stages of disposal. The Cu coupon surface is covered by fine p…
View article: Electrochemical characterization of Cu film fabricated via wire arc additive manufacturing in oxic groundwater
Electrochemical characterization of Cu film fabricated via wire arc additive manufacturing in oxic groundwater Open
We investigated the electrochemical corrosion behavior of Cu films fabricated using wire arc additive manufacturing (WAAM) as a candidate canister material for deep geological disposal (DGD). The investigation was conducted in an oxic grou…
View article: Strain-dependent-deformation property of Gyeongju compacted bentonite buffer material for engineered barrier system
Strain-dependent-deformation property of Gyeongju compacted bentonite buffer material for engineered barrier system Open
This study aims to investigate the strain-dependent-deformation property of Gyeongju bentonite buffer material. A series of unconfined compressive tests were performed with cylindrical specimens prepared at varying dry densities (ρd = 1.58…
View article: Pressure evaluation of a gap space in the engineered barrier system in a high-level radioactive waste repository
Pressure evaluation of a gap space in the engineered barrier system in a high-level radioactive waste repository Open
Disposal canisters and buffer materials are main components in an engineered barrier system designed for high-level radioactive waste disposal. The design temperature of the buffer material is below 100 °C in most countries, and many studi…
View article: Concepts of heat dissipation of a disposal canister and its computational analysis
Concepts of heat dissipation of a disposal canister and its computational analysis Open
The stability of engineered barriers in high-level radioactive waste disposal systems can be influenced by the decay heat generated by the waste. This study focuses on the thermal analysis of various canister designs to effectively lower t…
View article: The influence of air gaps on buffer temperature within an engineered barrier system
The influence of air gaps on buffer temperature within an engineered barrier system Open
High-level radioactive waste produced by nuclear power plants are disposed subterraneously utilizing an engineered barrier system (EBS). A gap inevitably exists between the disposal canisters and buffer materials, which may have a negative…
View article: Electrochemical corrosion behavior of atmospheric-plasma-sprayed copper as a coating material for deep geological disposal canisters
Electrochemical corrosion behavior of atmospheric-plasma-sprayed copper as a coating material for deep geological disposal canisters Open
Cu, which exhibits excellent corrosion resistance in underground environments, has been investigated as a canister material for use in the deep geological disposal of spent nuclear fuels. In this study, the technical viability of atmospher…
View article: Electrochemical and surface investigations of copper corrosion in dilute oxychloride solution
Electrochemical and surface investigations of copper corrosion in dilute oxychloride solution Open
The corrosion behavior of copper immersed in dilute oxychloride solution (100 μM) was studied through surface investigation and in-situ monitoring of open-circuit potential. The copper corrosion was initiated with copper dissolution into a…
View article: Development of Experimental System to Measure Waster Suction of Compacted Bentonites beyond 100 °C
Development of Experimental System to Measure Waster Suction of Compacted Bentonites beyond 100 °C Open
The compacted bentonite buffer is one of the most important components in an engineered barrier system(EBS) to dispose of high-level radioactive waste (HLW) produced by nuclear power generation. The design temperature of the bentonite buff…
View article: Investigation of the various properties of several candidate additives as buffer materials
Investigation of the various properties of several candidate additives as buffer materials Open
Bentonite buffer material is a critical component in an engineered barrier system (EBS) for disposing high-level radioactive waste (HLW). The bentonite buffer material protects the disposal canister from groundwater penetration and release…
View article: Investigation of Early Corrosion Behavior of Canister Candidate Materials in Oxic Groundwater by the EQCM Method
Investigation of Early Corrosion Behavior of Canister Candidate Materials in Oxic Groundwater by the EQCM Method Open
This study investigated the corrosion mass changes of canister candidate materials (Cu, Ni, Ti, SS304) in an oxic groundwater solution using the electrochemical quartz crystal microbalance method in order to estimate corrosion thickness. T…
View article: Corrosion behaviors of SS316L, Ti-Gr.2, Alloy 22 and Cu in KURT groundwater solutions for geological deep disposal
Corrosion behaviors of SS316L, Ti-Gr.2, Alloy 22 and Cu in KURT groundwater solutions for geological deep disposal Open
Deep geological disposal using a multibarrier system is a promising solution for treating high-level radioactive (HLRW) waste. The HLRW canister represents the first barrier for the migration of radionuclides into the biosphere, therefore,…