Development of a Computer Code for Low-and Intermediate-Level Radioactive Waste Disposal Safety Assessment

Park, J.W.; Kim, C.L.; Lee, E.Y.; Lee, Y.M.; Kang, C.H.; Zhou, W.; Kozak, M.W.

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자료유형: 학술저널

저자정보: Park, J.W. (Nuclear Environment Technology Institute, Korea Hydro & Nuclear Power Co., Ltd.) Kim, C.L. (Nuclear Environment Technology Institute, Korea Hydro & Nuclear Power Co., Ltd.) Lee, E.Y. (Nuclear Environment Technology Institute, Korea Hydro & Nuclear Power Co., Ltd.) Lee, Y.M. (Korea Atomic Energy Research Institute) Kang, C.H. (Korea Atomic Energy Research Institute) Zhou, W. (Monitor Scientific LLC) Kozak, M.W. (Monitor Scientific LLC)

저널정보: 대한방사선방어학회 방사선방어학회지 방사선방어학회지 제29권 제1호

발행연도: 2004.1

수록면: 41 - 48 (8page)

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A safety assessment code, called SAGE (Safety Assessment Groundwater Evaluation), has been developed to describe post-closure radionuclide releases and potential radiological doses for low- and intermediate-level radioactive waste (LILW) disposal in an engineered vault facility in Korea. The conceptual model implemented in the code is focused on the release of radionuclide from a gradually degrading engineered barrier system to an underlying unsaturated zone, thence to a saturated groundwater zone. The radionuclide transport equations are solved by spatially discretizing the disposal system into a series of compartments. Mass transfer between compartments is by diffusion/dispersion and advection. In all compartments, radionuclides ate decayed either as a single-member chain or as multi-member chains. The biosphere is represented as a set of steady-state, radionuclide-specific pathway dose conversion factors that are multiplied by the appropriate release rate from the far field for each pathway. The code has the capability to treat input parameters either deterministically or probabilistically. Parameter input is achieved through a user-friendly Graphical User Interface. An application is presented, which is compared against safety assessment results from the other computer codes, to benchmark the reliability of system-level conceptual modeling of the code.

#probabilistic safety assessment code #radionuclide releases #low-and intermediate-level radioactive waste disposal

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