13-18 May 2018
Casino Conference Centre
Europe/Prague timezone

Inverse estimation of upscaling of dispersion for cesium transport in crushed granite media

15 May 2018, 17:15
1h 30m
Gallery (Casino Conference Centre)

Gallery

Casino Conference Centre

Reitenbergerova 4/95, Mariánské Lázně, Czech Republic
Poster Radionuclides in the Environment, Radioecology Poster RER

Speaker

Dr CHUAN-PIN LEE ( Department of Earth Sciences, National Cheng Kung University, Tainan 70101, Taiwan)

Description

Crystalline rock is suitable the safety disposal of high-level radioactive waste (HLW). Fracture networks connections can dominate flow behaviors at the crystalline rock. In this study, advection-dispersion column experiments of cesium (Cs) through crushed granite (0.297 - 0.840 mm) were constructed where synthetic groundwater (GW) and seawater (SW) were employed as the liquid phase. This study conducts multi-length column tests (length: 2, 4, and 8 cm). The other parameters of columns are diameter of 5 cm, bulk density of 1.45 g/cm3 and porosity of 0.45.
This study presents the HYDURS-1D model simulation to estimate the parameters of transport in 1D crushed granite media. The dispersivity for multi-length crushed granite is estimated by using Marquardt-Levenberg optimization algorithm in the HYDRUS-1D model. The estimated dispersivity can provide a valuable reference for radionuclide transport of waste repositories.

Primary authors

Dr CHUAN-PIN LEE ( Department of Earth Sciences, National Cheng Kung University, Tainan 70101, Taiwan) Prof. Chuen-Fa Ni (Graduate Institute of Applied Geology, National Central University, No. 300, Zhongda Rd., Zhongli Dist., Taoyuan City, Taiwan) Dr I-Hsien LEE (Center for Environmental Studies, National Central University, No. 300, Zhongda Rd., Zhongli Dist., Taoyuan City, Taiwan) Ming-Chee Wu (Department of Earth Sciences, National Cheng Kung University, Tainan, Taiwan) Dr Shih-Chin Tsai (Nuclear Science and Technology Development Center, National Tsing Hua University, Hsinchu 30013, Taiwan) Dr Tsuey-Lin Tsai Prof. YI-LIN JAN (Dept. of Civil Engineering, Chien Hsin University of Science and Technology, Taiwan)

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