Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027274 |
An Adjoint Sensitivity Model For Transient Sequentially Coupled Radionuclide Transport in Porous Media | |
Mohamed Hayek; Banda S. RamaRao; Marsh Lavenue | |
2020-04-14 | |
发表期刊 | Water Resources Research
![]() |
出版年 | 2020 |
英文摘要 | We present an efficient mathematical/numerical adjoint sensitivity analysis model for transient radionuclide transport through heterogeneous porous media. This work extends our previous research on radionuclide transport in a steady‐state regime. Both continuous and discrete adjoint approaches have been developed in this current research. The mathematical equations associated with the adjoint system and required for the continuous approach have been derived. The methodology for deriving the discrete adjoint solution is also presented. For the homogeneous case, the adjoint system for radionuclide decay chain is solved analytically. The four‐member decay chain (238Pu → 234U → 230Th → 226Ra) is considered for validation. The validity of the analytical adjoint sensitivity model has been shown using two illustrative examples associated with two performance measures. The analytical adjoint states are compared with calculated numerical results and show excellent agreements. The sensitivity coefficients are also computed numerically using the perturbation method. The numerical sensitivity coefficients successfully reproduce the analytically derived sensitivities based on adjoint states. The adjoint model has been coupled with a derivative‐based global sensitivity method and applied to a real field case involving the performance assessment of a site currently being considered for underground nuclear storage in Northern Switzerland, Zürich Nordost. An illustrative case study of spent fuel and high‐level waste (SF/HLW) repository involving 6 radionuclides and 48 parameters has been considered for identifying the most important parameters with respect to the maximum radionuclide dose at the interface geosphere/biosphere. Based on the results of sensitivity analysis, the uncertainty of the maximum radionuclide dose has been performed using Monte Carlo simulations. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249231 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Mohamed Hayek,Banda S. RamaRao,Marsh Lavenue. An Adjoint Sensitivity Model For Transient Sequentially Coupled Radionuclide Transport in Porous Media[J]. Water Resources Research,2020. |
APA | Mohamed Hayek,Banda S. RamaRao,&Marsh Lavenue.(2020).An Adjoint Sensitivity Model For Transient Sequentially Coupled Radionuclide Transport in Porous Media.Water Resources Research. |
MLA | Mohamed Hayek,et al."An Adjoint Sensitivity Model For Transient Sequentially Coupled Radionuclide Transport in Porous Media".Water Resources Research (2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论