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Nakamura, Takahiro; Sanada, Hiroyuki; Sugita, Yutaka; Teshima, Minoru*; Kasagi, Toshio*; Kishimoto, Munemaru*; Deguchi, Tomonori*; Makuuchi, Ayumu*
JAEA-Research 2010-006, 68 Pages, 2010/06
JAEA-Research-2010-006.pdf:33.19MB
The present document is to report the result of geophysical survey by electric survey around a site proposed for the Horonobe Underground Research Laboratory Project at Horonobe-cho, Hokkaido by the Japan Atomic Energy Agency. This Electric survey using pole-pole array in Horonobe Underground Research Laboratory Area was the third survey. Resistivity distribution near surface was about 20 
m and it become to about 2 m as the depth increasing. Resistivity distribution was good agreement with existing survey results and existing electrical resistivity log data. By comparing resistivity model with hydrology model, it was confirmed that resistivity reflected the density of salinity. The range and distribution trends of apparent resistivity in this year were similar to the results of last year. It is thought that the data in which reproducibility is high is acquired in this survey. The influence on the underground water flow by construction is not admitted now.
Nakamura, Takahiro; Sanada, Hiroyuki; Sugita, Yutaka; Teshima, Minoru*; Kishimoto, Munemaru*; Matsuo, Koichi*
JAEA-Research 2008-102, 58 Pages, 2009/03
JAEA-Research-2008-102.pdf:48.97MB
The present document is to report the result of geophysical survey by electric survey around a site proposed for the Horonobe Underground Research Laboratory Project at Horonobe-cho, Hokkaido by the Japan Atomic Energy Agency. This Electric survey using pole-pole array in Horonobe Underground Research Laboratory Area was the second survey. Resistivity distribution near surface was about 20 ohm-m and it become to about 2 ohm-m as the depth increasing. Resistivity distribution was good agreement with existing survey results and existing electrical resistivity log data. By comparing resistivity model with hydrology model, it was confirmed that resistivity reflected the density of salinity. The range and distribution trends of apparent resistivity in this year were similar to the results of last year. It is thought that the data in which reproducibility is high is acquired in this survey. The influence on the underground water flow by construction is not admitted now.
Matsuo, Koichi*; Kishimoto, Munemaru*; Makuuchi, Ayumu*; Teshima, Minoru*; Sanada, Hiroyuki; Niunoya, Sumio*; Matsui, Hiroya
JAEA-Research 2008-071, 44 Pages, 2008/09
JAEA-Research-2008-071.pdf:29.04MB
Correlation between resistivity in rock mass and groundwater quality is shown from the results of investigation such as borings and geophysical exploration. Electrical resistivity survey had been done to understand impact on behavior of groundwater by construction of underground research laboratory. This paper shows distribution of resistivity around underground research laboratory obtained from electrical resistivity survey.
Matsuo, Koichi*; Kishimoto, Munemaru*; Negi, Tateyuki*; Teshima, Minoru*
JNC TJ5440 2005-001, 51 Pages, 2005/08
JNC-TJ5440-2005-001.pdf:15.08MB
The present document is to report the results of geophysical survey by electric syrvey around a site proposed for the Horonobe Underground Research Project at Horonobe-cho, Hokkaidou by JNC. Electrical survey using dipole-diple array was carried out at the area of Hokushin in Horonobe-cho near presumued Omagari-fault. Two dimensional resistivity inversion analysis was carried out and the resistivity structure from the surface to 250m below the sea level became clear.
Matsuo, Koichi*; Yokoi, Koichi*; Negi, Tateyuki*; Kasagi, Toshio*; Takahashi, Takeharu*; Teshima, Minoru*
JNC TJ5410 2005-001, 142 Pages, 2005/03
JNC-TJ5410-2005-001.pdf:18.35MB
The present document is to report the result of resistivity monitoring by using MT(Magnetotelluric) method near the site proposed for the Horonobe Underground Research Program at Horonobe-cho, Hokkaido by the Japan Nuclear Cycle Development Institute. The stationary MT observation system, installed near the HDB-1 borehole on November 2002, was moved to a site at the Hokusei-en, 4km west of the first site. This system is monitoring for the depth of underground resistivity. 0bservation data at the Hokusei-en from February 1st 2004 to January 31st 2005 was added in the investigation in 2004 fiscal year. But, data cannot be acquired from July 8th to November 11th of 2004 due to the disconnection trouble of the optical fiber cable for data transfer.The results were as follows
Matsuo, Koichi*; Negi, Tateyuki*; Yokoi, Koichi*; Takahashi, Takeharu*; Teshima, Minoru*
JNC TJ5410 2004-002, 188 Pages, 2004/02
JNC-TJ5410-2004-002.pdf:109.99MB
The present document is to report the results of geophysical survey by electromagnetic method around a site proposed for the Horonobe Underground Research Program at Horonobe-cho, Hokkaido by the Japan Nuclear Cycle Development Institute. Remote-reference AMT(Audio-frequency magnetotelluric) method was carried out at 59 stations over 4 km2 in the area of Hokushin in Horonobe-cho. Two dimensional and three dimensional resistivity inversion analysis was carried out and the resistivity structure from the surface to 1,000m below sea level became clear. The resistivity structure was studied by comparing geological structure presumed from existing geological information. Resistivity contour lines extends NNW-SSE trend in plan of resistivity that is coincident with geological structure. The resistivity distribution was good agreement with existing electrical resistivity log data. At 500m below sea level, the resistivity of South-West part from presumed Omagari-fault was ranges from 1 to 3 ohm-m, and that of North-East part is ranges from 3 to 7 ohm-m.
Nishikino, Masaharu; Ochi, Yoshihiro; Hasegawa, Noboru; Kawachi, Tetsuya; Ishino, Masahiko; Imazono, Takashi; Tanaka, Momoko; Sato, Katsutoshi; Yamamoto, Minoru; Oba, Toshiyuki; et al.
no journal, ,
Recent Progress in the development of laser-driven plasma soft X-ray laser (XRL) and the applications are presented. In the source development, TOPAZ laser using Nd:glass zigzag slab amplifiers with 10 J, 0.1 Hz repetition-rate routinely provides the fully spatial coherent X-ray laser at 13.9 nm for the applications. The bright, coherent, and picoseconds X-ray pulse can be used in a variety of applications such as X-ray speckle measurement and interferometer for probing materials, diffraction imaging, nano-scale fabrication, radiation biology, and so on. In order to extend the use of XRLs, now we are constructing new XRL beam lines for the optical pump and XRL probe experiment.
Sato, Naomi; Hayano, Akira; Teshima, Minoru*; Negi, Tateyuki*; Yamane, Terumasa*; Kawasaki, Shinji*
no journal, ,
This paper reports the preliminary results of the magnetotelluric (MT) survey aiming to evaluate the three-dimensional distribution of fossil seawater in the Horonobe area. The MT survey was conducted in the area of 3 km square adjacent to the Horonobe Underground Research Laboratory at 60 points. Our results showed that the distribution of the resistivity varied in accordance with the geological structure. This survey was funded by the Ministry of Environment, Trade and Industry.
Sato, Naomi; Hayano, Akira; Kashihara, Koji*; Teshima, Minoru*; Negi, Tateyuki*
no journal, ,
The objective of this study was to assess the effect of borehole siting on collocated cokriging (COK) for estimating the three-dimensional distribution of chloride ion concentration (Cl
) and stable isotope (
O, D) compositions of groundwater in the Horonobe area, which are indicators of paleo-saline water. When compared to the full model consisting of ten borehole surveys, COK with a partial dataset consisting of 1-3 borehole surveys covering the entire range of resistivity from the electromagnetic survey in the study area performed better than other datasets. The results suggested that a borehole survey at a site with the representative geochemical feature in the region could yield adequate coefficients in the COK and, as a result, produce reasonable estimates with a cost-effective procedure. This survey was funded by the Ministry of Environment, Trade and Industry.