• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 춘계 학술발표회
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• pp.791-800
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• 2010

This paper presents the construction status and the conceptual designs of midium and high level radioactive waste disposal facilities from all around world. For the midium radioactive waste, a shallow disposal using trench or a deep depth disposal are adopted. However, these are rather focusing on the social and cultural point of view than the technical. Meanwhile, the high level radioactive waste is basically disposed in the deep underground. The corresponding ground conditions are usually dense and composed of sedimentary and crystalline rocks mainly with low permeability. A barrier system is made of canister which consists of copper, titanium, and tin. The inner and outer side of the canister are composed of different materials respectively.

• 방사성폐기물학회지
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• 제21권4호
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• pp.465-479
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• 2023

To ensure the safety of disposal facilities for radioactive waste, it is essential to quantitatively evaluate the performance of the waste disposal facilities by using safety assessment models. This paper addresses the development of the safety assessment model for the underground silo of Wolseong Low-and Immediate-Level Waste (LILW) disposal facility in Korea. As the simulated result, the nuclides diffused from the waste were kept inside the silo without the leakage of those while the integrity of the concrete is maintained. After the degradation of concrete, radionuclides migrate in the same direction as the groundwater flow by mainly advection mechanism. The release of radionuclides has a positive linear relationship with a half-life in the range of medium half-life. Additionally, the solidified waste form delays and reduces the migration of radionuclides through the interaction between the nuclides and the solidified medium. Herein, the phenomenon of this delay was implemented with the mass transfer coefficient of the flux node at numerical modeling. The solidification effects, which are delaying and reducing the leakage of nuclides, were maintained the integrity of the nuclides. This effect was decreased by increasing the half-life and the mass transfer coefficient of radionuclides.

• 시스템엔지니어링학술지
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• 제17권1호
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• pp.65-75
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• 2021

When the decommissioning of South Korea nuclear power plants is promoted in earnest with the permanent shutdown of Kori Unit 1 in 2017, a large amount of various types of radioactive waste will be generated. For minimal generation and safe management of decommissioning waste, the waste should be made by appropriate classification of the dismantling waste characteristics in accordance with physical, chemical and radiological characteristics to meet the acceptance criteria of disposal facilities. Replacing the preliminary inspection at the site for the compliance of the waste acceptance criteria (WAC) of medium and low-level radioactive waste with the generator's own radioactive waste certification program (WCP), from the perspective of disposal, the optimization of waste management at the national level contributes to the efficient availability of disposal, such as the processing of non-conforming radioactive wastes at the site. To this end, it is important to evaluate radioactivity in each system and area such as nuclear reactors before decommissioning is carried out in earnest, and the prior removal of harmful wastes is important. From waste collection to waste disposal, decommissioning waste should be managed at each stage in consideration of the acceptance criteria of disposal facilities to minimize the generation of non-conforming waste.

• 에너지공학
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• 제17권2호
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• pp.77-87
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• 2008

2005년 중 저준위 방사성폐기물처분시설의 부지선정 과정은 목표를 달성했다는 측면에서 성공 사례로 평가할 수 있다. 그러나 과정에서 나타난 한계점들은 여전히 풀어야 할 숙제로 남아 있다. 이 정책의 성공과 한계에 대한 영향 인자와 이들 상호간의 관계를 분석함으로써 향후 관련 정책 수립 및 추진에 효과적인 틀을 제공할 수 있을 것으로 예상된다. 방사성폐기물처분시설 정책의 정성적인 요인들은 변수로 설정하여 방사성폐기물처분시설 모델을 수립하였으며 이 모델을 계산하기 위하여 통합적 분석 툴인 시스템다이내믹스를 활용하였다. 시스템다이내믹스 분석 결과를 보면 정책주체의 투명성, 지역 지원 수준, 홍보를 조절 가능한 요인으로 설정하였을 때, 찬성 논리와 반대 논리 사이에 직간접적으로 영향을 미치고 중간에 신뢰가 매우 중요한 역할을 하고 있음을 가시적으로 나타낼 수 있었다. 신뢰는 제시된 여러 인자들에 영향을 미치거나 피드백되어 의견이 결정의 방향성을 전환할 있는 정책지렛대라 할 수 있다.