Analysis of radionuclide migration in combined fracture/porous media by using stream tube approach = 유관 접근법을 이용한 균열/기공 혼합매체에서의 방사성 동위원소의 이동에 관한 연구

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Radionuclide migration in geologic media is investigated by using semi-infinite medium Green``s function techniques. In view of critical path to reach the biosphere, a combined fracture/porous media model is introduced to consider the effect of enhanced migration due to thin fracture. The mechanisms for solute transport are assumed to be advection in the fracture, hydrodynamic dispersion in the porous matrix, radioactive decay of the ion species, and sorption on the fracture wall. Stream tube approach is suggested as an efficient method to analyze ground-water hydrology primarily along the fractures. Three-dimensional heterogeneous media may be approximated as network of one-dimensional flow paths (fractures) and the subsurface transport equation can be solved more easily and efficiently by using Green``s function techniques within each stream tubes. And a method of combining these Green``s function to produce an overall Green``s function for the flow path network is developed. Analytical solution with various release mode for heterogeneous media is obtained and numerical calculations are performed for parametric studies. Comparison with other model shows the validity of the present study.
Advisors
Lee, Kun-Jairesearcher이건재researcher
Description
한국과학기술원 : 핵공학과,
Publisher
한국과학기술원
Issue Date
1986
Identifier
65457/325007 / 000841169
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 핵공학과, 1986.2, [ [vi], 59 p. ]

URI
http://hdl.handle.net/10203/49123
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=65457&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
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