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Geo-descriptive Modeling of Water Conducting Features Characterized in Sedimentary Formations in Horonobe Area of Japan

Published online by Cambridge University Press:  01 February 2011

Koichiro Hatanaka ,
Lim Doo-hyun  and
Eiichi Ishii
Koichiro Hatanaka
Affiliation:
hatanaka.koichiro@jaea.go.jp, Japan Atomic Energy Agency, Horonobe Undergruond Research Center, Horonobe-Cho, Japan
Lim Doo-hyun
Affiliation:
dlim@golder.com, Golder Associates, Redmond, Washington, United States
Eiichi Ishii
Affiliation:
ishii.eiichi@jaea.go.jp, Japan Atomic Energy Agency, Horonobe Undergruond Research Center, Horonobe-Cho, Japan
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Abstract

A three-dimensional (3-D) discrete fracture network (DFN) geo-descriptive model is developed for water conducting features (WCFs) in the sedimentary formations of Horonobe underground research laboratory (URL) in Japan. Fracturing and faulting system in/around the URL area, which is the main investigation area of the Horonobe URL project, is characterized by taking into account borehole geophysical logging data, regional geologic/structural data, and fracture/fault data (orientation, intensity, size) obtained from the surface-based investigations. Volumetric fracture intensity potential is estimated by the correlation and the multi-linear regression analysis of observed data, and is used as one of controls for 3-D DFN model. A regional scale 3-D geo-descriptive DFN model is constructed based on the analyzed fracturing system identified for the WCFs. The current 3-D geo-descriptive model could be utilized explicitly to derive performance assessment (PA) parameters for the hypothetical repository of the high-level radioactive wastes in Japan, and to assist optimization of the safe repository design.

Keywords

waste managementgeologicsimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1265: Symposium AA – Scientific Basis for Nuclear Waste Management XXXIV , 2010 , 1265-AA06-04
Copyright
Copyright © Materials Research Society 2010

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