2D FEM analysis for coupled thermo-hydro-mechanical-migratory processes in near field of hypothetical nuclear waste repository

doi:10.1007/s11771-010-0530-4

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	2D FEM analysis for coupled thermo-hydro-mechanical-migratory processes in near field of hypothetical nuclear waste repository
	Zhang Wei-qing 1; Zhang Yu-jun 2
刊名	JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY
	2010
卷号	17 期号:3 页码:612-620
关键词	radioactive nuclide concentration thermo-hydro-mechanical-migratory coupling 2D FEM analysis
ISSN号	1005-9784
DOI	10.1007/s11771-010-0530-4
英文摘要	In order to consider the influence of temperature and stress fields on the migration of radioactive nuclide with underground water movement, an elastoplastic model and a 2D FEM code for analysis of coupled thermo-hydro-mechanical (THM) processes in saturated and unsaturated porous media were extended and improved through introducing the percolation and migration equation, so that the code can be used for solving the temperature field, flow field, stress field and nuclide concentration field simultaneously. The states of temperatures, pore pressures and nuclide concentrations in the near field of a hypothetical nuclear waste repository were investigated. The influence of the half life of the radioactive nuclide on the temporal change of nuclide concentration was analyzed considering the thermo-hydro-mechanical-migratory coupling. The results show that, at the boundary of the vitrified waste, the concentration of radioactive nuclide with a half life of 10 a falls after a period of rising, with the maximum value of 0.182 mol/m(3) and the minimum value of 0.181 mol/m(3) at the end of computation. For a half life of 1 000 a, the concentration of radioactive nuclide always increases with the increase of the time during the computation period; and the maximum value is 1.686 mol/m(3) at the end of the computation. Therefore, under the condition of THM coupling, the concentration of radioactive nuclide with a shorter half life will decrease more quickly with water flow; but for the radioactive nuclide with a longer half life, its concentration will keep at a higher level for a longer time in the migration process.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL OF CENTRAL SOUTH UNIV TECHNOLOGY
WOS记录号	WOS:000279019400030
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3233]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.SW Jiaotong Univ, Sch Civil Engn 2.Chinese Acad Sci, Inst Rock & Soil Mech;
推荐引用方式 GB/T 7714	Zhang Wei-qing,Zhang Yu-jun. 2D FEM analysis for coupled thermo-hydro-mechanical-migratory processes in near field of hypothetical nuclear waste repository[J]. JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY,2010,17(3):612-620.
APA	Zhang Wei-qing,&Zhang Yu-jun.(2010).2D FEM analysis for coupled thermo-hydro-mechanical-migratory processes in near field of hypothetical nuclear waste repository.JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY,17(3),612-620.
MLA	Zhang Wei-qing,et al."2D FEM analysis for coupled thermo-hydro-mechanical-migratory processes in near field of hypothetical nuclear waste repository".JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY 17.3(2010):612-620.