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Yamakawa, Tadashi; Takeda, Seiji; Kimura, Hideo; Hyodo, Hiroshi*
JAEA-Research 2007-040, 21 Pages, 2007/03
JAEA-Research-2007-040.pdf:2.95MB
Radionuclide migration toward human society through geologic processes is to be assessed as part of safety assessments of geologic disposal for radioactive waste. A subsurface temperature in non-Quaternary volcanic regions was focused as one of the changes in this study. The study was conducted to extract features of subsurface temperature in non-Quaternary volcanic regions throughout Japan. After delineating Quaternary volcanic regions, features in non-Quaternary volcanic regions were studied in various aspects. The present study clarified that a relationship between subsurface temperature and its depth was expressed by an equation in non-Quaternary volcanic regions far from about 24 km of Quaternary volcanic centers. This led to about 16
C/km in general geothermal gradient in non-Quaternary volcanic areas, which was lower than 20C/km of the previous study.
Yamakawa, Tadashi; Munakata, Masahiro; Kimura, Hideo; Hyodo, Hiroshi*
JAEA-Research 2007-039, 26 Pages, 2007/03
JAEA-Research-2007-039.pdf:4.68MB
Radionuclide migration toward human society through geologic processes is to be assessed as part of long-term safety assessments of geologic disposal for radioactive waste. This study was conducted to develop methodologies of boundary delineation for regional groundwater flow system. Geographic Information System, GIS, was applied to Miyakoji in the Abukuma as an area of interest. The present study revealed that, taking the groundwater flows and fracture characteristics of the area into consideration, the groundwater flow system in Miyakoji drainage basin should be bounded by the Otakine mountain area and the northern part of Tokoha drainage basin, which occupies a larger area than understood before.
Hyodo, Hiroshi*
JNC TJ5410 2004-009, 60 Pages, 2004/03
JNC-TJ5410-2004-009.pdf:7.52MB
We have compiled seismic data obtained by JNC seismographic station and JMA Hi-net station. In results of analysis, we have a tendency of hypocenters determined of using JMA and JNC data.
Mori, Koichi*; Sekine, Norio*; Sato, Hajime*; Shikano, Naoto*; Shimayu, Daisuke*; Shiwaku, Hideaki; Hyodo, Kazuyuki*; Oka, Hiroshi*
Japanese Journal of Medical Physics, 22(1), p.13 - 19, 2002/03
no abstracts in English