Development of Geoscientific Site Assessment Factors for the Deep Geological Disposal of HLW in South Korea

Kim, Eungyeong; Kihm, You Hong; Cheon, Dae‐Sung; Hyun, Sung Pil; Jeon, Jeong-Soo; Kim, Hyoung Chan; Nahm, Wook-Hyun; Suk, Heejun; Jin, Kwangmin; Ko, Kyoung Tae; Choi, Seungbeom

doi:10.32390/ksmer.2020.57.2.215

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…고준위 방사성 폐기물(이하 방폐물)의 긴 반감기로 인 한 장기 지속적 독성수준을 고려하였을 때, 매우 오랜 시 간 동안 이를 장기간 격리할 수 있는 처리 시스템이 필 요하다 (Kim and Kwon, 2017;Kim et al, 2020;Jung and Ji, 2020). 여러 국가 및 국제 기구의 다양한 평가에 의하 면 고준위 방폐물의 지질학적 심층 처분(Deep Geological Repository, DGR)은 안전한 영구처분을 보장하는 가장 실 용적이고 효과적인 방법으로 알려져 있으며 (IAEA, 1981;JAEA, 2011;SKB, 2011;POSIVA,2012;Ji et.…”

Section: 서 론unclassified

Geological Factor Analysis for Evaluating the Long-term Safety Performance of Natural Barriers in Deep Geological Repository System of High-level Radioactive Waste

Lee,

Jeong,

Park

et al. 2023

Econ. Environ. Geol.

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In this study, an investigation was conducted on the features, events, and processes (FEP) that could impact the long-term safety of the natural barriers constituting high-level radioactive waste geological repositories. The FEP list was developed utilizing the IFEP list 3.0 provided by the Nuclear Energy Agency (NEA) as foundational data, supplemented by geological investigations and research findings from leading countries in this field. A total of 49 FEPs related to the performance of the natural barrier were identified. For each FEP, detailed definitions, classifications, impacts on long-term safety, significance in domestic conditions, and feasibility of quantification were provided. Moreover, based on the compiled FEP list, three scenarios that could affect the long-term safety of the disposal facility were developed. Geological factors affecting the performance of the natural barrier in each scenario were selected and their relationships were visualized. The constructed FEP list and the visualization of interrelated factors in various scenarios are anticipated to provide essential information for selecting and organizing factors that must be considered in the development of mathematical models for quantitatively evaluating the long-term safety of deep geological repositories. In addition, these findings could be effectively utilized in establishing criteria related to the key performance of natural barriers for the confirmation of repository sites.

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Section: 서 론unclassified

Geological Factor Analysis for Evaluating the Long-term Safety Performance of Natural Barriers in Deep Geological Repository System of High-level Radioactive Waste

Lee,

Jeong,

Park

et al. 2023

Econ. Environ. Geol.

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“…Evaluation item and corresponding parameters regarding rock mechanics and engineering(Choi et al, 2021) 사에 필요한 자료 축적에서 선도국들에 비해 많이 늦은 감 이 있으나 2016년에 체계화된 조사요소 분류 이후 각 분야 에서 주요한 평가인자에 대한 한반도 규모의 자료조사, 지 체구조와 암종을 고려한 심부 시추공 등을 통한 다학제적 인 현장/실내시험 등을 수행하고 있다(KIGAM, 2019;Kim et al, 2020; KIGAM, 2021;Choi et al, 2020;Choi et al, 2021). 이들에서 획득한 자료의 수는 선도국들에 비해 상대 적으로 적은 수이지만 부지선정절차와 병행하면서 국외 벤 치마킹과 국내 연구기관, 수행기관들 간의 상호 연계를 통 해 극복해 나갈 수 있을 것으로 기대한다.…”

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A Study on Nationwide Maps with Geoenvironmental Information and Geological Characteristics of Bedrock for HLW Disposal

Cheon¹,

Kihm

Jin³

et al. 2022

J. Korean Soc. Miner. Energy Resour. Eng.

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High-level radioactive waste (HLW) disposal in the nuclear generation industry is a critical issue that must be solved not only in South Korea, but also worldwide. In South Korea, temporary storage facilities for spent fuels of each power plant are nearly saturated. Thus, discussions on the interim storage and permanent disposal of HLW are inevitable. For the geological disposal of HLW, determining a suitable disposal system that considers the geological environment of each country is essential. Since a disposal system wholly depends on the characteristics of the disposing host rock, selecting a suitable host rock is vital. However, a host rock for the geological disposal of HLW in South Korea has not yet been determined because the geological environments of South Korea are tectonically diverse and complicated. Moreover, information available on the deep geological environment is insufficient for selecting a suitable host rock. Therefore, in this paper, we introduced production processes of geoenvironmental information maps for nationwide geological characteristics that can be used to exclude unsuitable areas for HLW geological disposal, which constitutes the first step in the process of site selection. The geoenvironmental information maps were prepared for 8 items, including rock type, mine distribution, lineament, faults, seismotectonics, uplift rate, hydraulic conductivity, and geothermal gradient. Based on the geoenvironment information map of the rock type and the geological structures in South Korea, an ongoing multidisciplinary study on the characteristics of bedrock was introduced. The southern part of the Korean peninsula was divided into four tectonic structures and four representative rock types, and methods for obtaining their geological, hydrogeological, geochemical, geophysical, and rock mechanical characteristics using a 750-m deep borehole drilled in the relevant area were presented. Additionally, the results were analyzed with focus on the uniaxial compressive strength and in-situ stress characteristics, which are key parameters in the field of rock mechanics. This information could be useful for investigating reliable basement characteristics through multidisciplinary analysis linked to fields other than rock mechanics.

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Development of Geoscientific Site Assessment Factors for the Deep Geological Disposal of HLW in South Korea

Cited by 2 publications

References 6 publications

Geological Factor Analysis for Evaluating the Long-term Safety Performance of Natural Barriers in Deep Geological Repository System of High-level Radioactive Waste

Geological Factor Analysis for Evaluating the Long-term Safety Performance of Natural Barriers in Deep Geological Repository System of High-level Radioactive Waste

A Study on Nationwide Maps with Geoenvironmental Information and Geological Characteristics of Bedrock for HLW Disposal

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