월성원자력환경관리센터의 폐쇄후 처분안전성평가 : 1단계 인허가 적용사례를 중심으로 = A Safety Assessment for the Wolsong LILW Disposal Center : As a part of safety case for the first stage disposal

다국어 초록 (Multilingual Abstract)

Post-closure safety assessment for the Wolsong Low- and Intermediate-level radioactive waste Disposal Center is described. Based on assessment context, closure concept and ground water flow characteristics of the disposal site, brief descriptions are included on the assessment scenarios, models, input parameters and tools. Radionuclide transport modeling in the near-field and far-field, gas generation and transport modeling, human intrusion and biosphere transport are also described briefly. Assessment results for each scenarios are shown to meet the performance criteria of regulatory body. Further and continuous efforts to improve the safety of disposal facility will be made during the construction and operational period.

국문 초록 (Abstract)

중저준위 방사성폐기물의 영구처분을 위하여 건설되는 월성원자력환경관리센터의 1단계 폐쇄후 안전성평가에 대하여 기술하였다. 처분시설의 건설운영허가를 위하여 작성된 안전성평가에 대하여 평가개요, 처분시설의 폐쇄개념, 처분부지에 대한 지하수 유동특성을 이용하여 평가를 위한 시나리오의 개발과정과 도출된 평가대상 시나리오에 대한 개념을 기술하였다. 폐쇄후 안전성평가 모델링을 위한 평가도구, 입력인자와 개별 시나리오에 대한 핵종누출 모델링, 기체발생 및 기체이동 모델링, 인간침입 모델링과 생태계 모델링에 대하여 기술하였다. 처분시설의 폐쇄후 안전성 평가시나리오에 대하여 국내 규제치를 만족하는 것으로 평가되었으며 향후 처분시설 안전성에 대한 불확실성 저감과 신뢰성 증진을 위한 노력을 지속적으로 수행할 예정이다.

참고문헌 (Reference)

• 1 교육과학기술부, "교육과학기술부 고시 제2008-63호, 중?저준위 방사성폐기물 처분시설에 관한 방사선 위해방 지기준 고시"
• 2 Napier, B. A, "User's Manual. Volume 2 of GENII - The Hanford Environmental Radiation Dosimetry Software System" Pacific Northwest Laboratory 1988
• 3 IAEA, "Safety Fundamentals, The principles of radioactive waste management" IAEA 1995
• 4 IAEA, "Safety Assessment Methodologies for Near Surface Disposal Facility, Results of a co-ordinated research project, Vol. 1: Review and enhancement of safety assessment approaches and tools" Improvement of Safety Assessment Methodologies For Near Surface Radioactive Waste Disposal Facilities (ISAM) 2004
• 5 ICRP, "Radiation Protection Recommendations as Applied to the Disposal of Long-lived Solid Radioactive Waste" ICRP Publication 28 (28): 2000
• 6 Sinclair, J.E, "MASCOT and MOP Programs for Probabilistic Safety Assessment PART D: MASCOT(Version 3C) User Guide" AEA Technology 1994
• 7 Sinclair, J.E, "MASCOT and MOP Programs for Probabilistic Safety Assessment PART B: MASCOT Technical Details" AEA Technology 1994
• 8 Sinclair, J.E, "MASCOT and MOP Programs for Probabilistic Safety Assessment PART A: Overview" AEA Technology 1994
• 9 Diersch, H.J.G, "FEFLOW 5.2: Finite Element Subsurface Flow & Transport Simulation System, User’s Guide, WASY GmbH"
• 10 U. S. EPA, "External Exposure to Radionuclides in Air, Water, and Soil" Environmental Protection Agency 1993
• 11 Napier, B. A, "Conceptual Representation. Volume 1 of GENII - The Hanford Environmental Radiation Dosimetry Software System" Pacific Northwest Laboratory 1988
• 12 ICRP, "Age-Dependent Doses to the Members of the Public from Intake of Radionuclides Part 5, Compilation of Ingestion and Inhalation Coefficient" ICRP Publication 26 (26): 1996
• 13 "AMBER 4.4 , Reference Guide, Enviros QuantiSci and Quintessa Ltd"