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      KCI등재 SCIE SCOPUS

      Integrated Safety Assessment for Multi-stage Processing of Nuclear Decommissioning Waste Considering Material Partitioning and Transformation

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      https://www.riss.kr/link?id=A109763816

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      This study developed a comprehensive safety assessment model implemented in Microsoft ® Excel for the multi-stage processing of decommissioning waste. The model enhances existing approaches by allowing fl exible combinations and sequencing of processing steps while considering material transformations such as phase separation during melting and incineration.
      It integrates the International Atomic Energy Agency Safety Reports Series No. 19 for small facilities and a module based on United States Nuclear Regulatory Commission Regulatory Guide 1.109 for large facilities to support age-specifi c public dose assessments. Partial verifi cation of the public dose assessment module using NRCDose3 Code version 1.1.4 confi rmed its accuracy and reliability. The model was tested at the comprehensive radioactive waste processing facility within the Kori nuclear power plant site and incorporated various waste types and processing steps including melting and incineration.
      Assessment accounted for phase changes and nuclide redistribution during processing. External exposure from 60 Co and 137 Cs was dominant for most workers under normal conditions, while 54 Mn exposure was signifi cant for slag workers due to radionuclide partitioning. In abnormal conditions, inhalation became the major exposure pathway for workers and the public. This model off ers a robust framework for evaluating radiological impacts in decommissioning waste processing to ensure enhanced protection for workers and the public.
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      This study developed a comprehensive safety assessment model implemented in Microsoft ® Excel for the multi-stage processing of decommissioning waste. The model enhances existing approaches by allowing fl exible combinations and sequencing of process...

      This study developed a comprehensive safety assessment model implemented in Microsoft ® Excel for the multi-stage processing of decommissioning waste. The model enhances existing approaches by allowing fl exible combinations and sequencing of processing steps while considering material transformations such as phase separation during melting and incineration.
      It integrates the International Atomic Energy Agency Safety Reports Series No. 19 for small facilities and a module based on United States Nuclear Regulatory Commission Regulatory Guide 1.109 for large facilities to support age-specifi c public dose assessments. Partial verifi cation of the public dose assessment module using NRCDose3 Code version 1.1.4 confi rmed its accuracy and reliability. The model was tested at the comprehensive radioactive waste processing facility within the Kori nuclear power plant site and incorporated various waste types and processing steps including melting and incineration.
      Assessment accounted for phase changes and nuclide redistribution during processing. External exposure from 60 Co and 137 Cs was dominant for most workers under normal conditions, while 54 Mn exposure was signifi cant for slag workers due to radionuclide partitioning. In abnormal conditions, inhalation became the major exposure pathway for workers and the public. This model off ers a robust framework for evaluating radiological impacts in decommissioning waste processing to ensure enhanced protection for workers and the public.

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