국내 ∙ 외 방사성폐기물 해상운반 현황 및 침몰사고 시 일반인 선량평가 사례 분석
Analysis of Domestic and Overseas Radioactive Waste Maritime Transportation and Dose Assessment for the Public by Sinking Accident
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Demand for RW transportation is expected to increase due to the continuous generation of RW fromnuclear power plants and facilities, decommissioning of plants, and saturation of spent fuel temporary storage facilities. The locational aspect of plants and radiation protection optimization for the public have led to an increasingdemand for maritime transportation, necessitating to apprehend the overseas and domestic current status. Given thepotential long-term radiological impact on the public in the event of a sinking accident, a pre-transportation exposureassessment is necessary. The objective of this study is to investigate the overseas and domestic RW maritime transportationcurrent status and overseas dose assessment cases for the public in sinking accident. Selected countries,including Japan, UK, Sweden, and Korea, were examined for transport cases, Japan and the U.S were chosen for doseassessment case in sinking accidents. As a result of the maritime transportation case analysis, it was performed betweennuclear power plants and reprocessing facilities, from plants to disposal or intermediate storage facilities. HLWand MOX fuel were transported using INF 3 shipments, and all transports were performed low speed of 13 kn or less. As a result of the dose assessment for the public in sinking accident, japan conducted an assessment for the sinking ofspent fuel and vitrified HLW, and the U.S conducted for the sinking of spent fuel. Both countries considered externalexposure through swimming and working at seashore, and internal exposure through seafood ingestion as exposurepathway. Additionally, Japan considered external exposure through working on board and fishing, and the U.S consideredinternal exposure through spray inhalation and desalinized water and salt ingestion. Internal exposure throughseafood ingestion had the largest dose contribution. The average public exposure dose was 20 years after the sinking,0.04 mSv yr-1 for spent fuel and 5 years after the sinking, 0.03 mSv yr-1 for vitrified HLW in Japan. In the U.S, it was1.81 mSv yr-1 5 years after the sinking of spent fuel. The results of this study will be used as fundamental data formaritime transportation of domestic RW in the future.
Abstract
Demand for RW transportation is expected to increase due to the continuous generation of RW fromnuclear power plants and facilities, decommissioning of plants, and saturation of spent fuel temporary storage facilities. The locational aspect of plants and radiation protection optimization for the public have led to an increasingdemand for maritime transportation, necessitating to apprehend the overseas and domestic current status. Given thepotential long-term radiological impact on the public in the event of a sinking accident, a pre-transportation exposureassessment is necessary. The objective of this study is to investigate the overseas and domestic RW maritime transportationcurrent status and overseas dose assessment cases for the public in sinking accident. Selected countries,including Japan, UK, Sweden, and Korea, were examined for transport cases, Japan and the U.S were chosen for doseassessment case in sinking accidents. As a result of the maritime transportation case analysis, it was performed betweennuclear power plants and reprocessing facilities, from plants to disposal or intermediate storage facilities. HLWand MOX fuel were transported using INF 3 shipments, and all transports were performed low speed of 13 kn or less. As a result of the dose assessment for the public in sinking accident, japan conducted an assessment for the sinking ofspent fuel and vitrified HLW, and the U.S conducted for the sinking of spent fuel. Both countries considered externalexposure through swimming and working at seashore, and internal exposure through seafood ingestion as exposurepathway. Additionally, Japan considered external exposure through working on board and fishing, and the U.S consideredinternal exposure through spray inhalation and desalinized water and salt ingestion. Internal exposure throughseafood ingestion had the largest dose contribution. The average public exposure dose was 20 years after the sinking,0.04 mSv yr-1 for spent fuel and 5 years after the sinking, 0.03 mSv yr-1 for vitrified HLW in Japan. In the U.S, it was1.81 mSv yr-1 5 years after the sinking of spent fuel. The results of this study will be used as fundamental data formaritime transportation of domestic RW in the future.
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