복합시나리오 기반 GoldSim 활용 심층처분장 안전성평가 = Safety Assessment of a Deep Geological Repository Using GoldSim under Complex Scenarios

다국어 초록 (Multilingual Abstract)

Safety Assessment of a Deep Geological Repository Using GoldSim under Complex Scenarios HYUNJIN YU Advisor : Prof. Jong Soon Song, Ph.D. Department of Nuclear Engineering Graduate School of Chosun University The disposal of High-Level Waste (HLW) requires long-term and stable management extending over hundreds of thousands of years, due to its high level radioactivity and long half-life. However, various disposal alternatives proposed internationally have not been realized due to social and economic constraints. At present, the option of managing and disposing of domestically generated waste within each country is being discussed. Among these options, deep geological disposal is evaluated as the most practical alternative, with proven long-term safety and economic feasibility. Despite the operation of numerous nuclear power plants in Korea, the absence of a disposal facility for HLW makes it urgent to establish measures to ensure safety. In this context, this study applied the FEPs(Features, Events, Processes) methodology to demonstrate the safety of a deep geological repository and derived a complex scenario combining an earthquake and human intrusion. By performing GoldSim modeling and simulation, this study aims to analyze radionuclide transport and environmental impacts under the given scenario, thereby confirming that the repository maintains sufficient barrier performance even under extreme conditions. The results of this study are expected to serve as important reference data for the future design and development of a safety assessment framework for domestic HLW repositories, and to contribute to building public trust in long-term management.

목차 (Table of Contents)

• 제 1 장 서론 1
• 제 2 장 고준위방사성폐기물 처분 현황 3
• 제 1 절 국외 고준위방사성폐기물 처분 기술개발 현황 3
• 1. 미국 3
• 2. 스웨덴· 5
• 3. 스위스· 8
• 4. 핀란드 10
• 제 2 절 국내 고준위방사성폐기물 처분 연구 현황 11
• 제 3 장 처분안전성평가 시나리오 분석 및 프로그램 선정 15
• 제 1 절 처분안전성평가 프로그램 비교 및 분석 15
• 1. AMBER 15
• 2. GENⅡ· 16
• 3. GWSCREEN 17
• 4. MASCOT-K 18
• 5. GoldSim 18
• 제 2 절 국내 FEPs 기반 시나리오 분석· 20
• 1. 시나리오의 분석 21
• 2. 복합시나리오 선정· 25
• 제 4 장 입력 인자 구축 및 모델링 28
• 제 1 절 입력 인자 구축 28
• 1. 핵종 선정 28
• 2. 캐니스터 및 심부 암반 물성 구축 30
• 3. 지진 및 인간침입 시나리오 인자 구축· 30
• 제 2 절 복합시나리오 모델링· 31
• 제 5 장 평가 결과 37
• 제 6 장 결론 41
• 참고문헌 42