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Journal Articles

A Measurement method of long-term mechanical stability of support and rock mass after the excavation of galleries; Case study in Horonobe Underground Research Center

Aoyagi, Kazuhei; Sakurai, Akitaka; Miyara, Nobukatsu; Sugita, Yutaka; Tanai, Kenji

Shigen, Sozai Koenshu (Internet), 6(2), 7 Pages, 2019/09

no abstracts in English

Journal Articles

Estimation of in situ stress based on the measurement of convergence during gallery excavation

Aoyagi, Kazuhei; Kamemura, Katsumi*; Sugawara, Kentaro*; Hagihara, Takeshi*

Dai-53-Kai Jiban Kogaku Kenkyu Happyokai Happyo Koenshu (DVD-ROM), p.11 - 12, 2018/07

no abstracts in English

Journal Articles

Development of a back analysis method for the estimation of in situ stress based on the measured convergence in the Horonobe Underground Research Laboratory

Aoyagi, Kazuhei; Kamemura, Katsumi*; Nago, Makito*; Sugawara, Kentaro*; Matsubara, Makoto*

Proceedings of ITA-AITES World Tunnel Congress 2017 (WTC 2017) (USB Flash Drive), 10 Pages, 2017/06

An in situ stress state is one of the important factors in the design of deep underground facility of high-level radioactive waste disposal repository. This study establishes a practical and effective method for estimating in situ stress state on the basis of the measured convergence during gallery excavation. The convergence was measured in various directions of the loop gallery at 350m depth of the Horonobe Underground Research Laboratory; this allows determination of the stress state corresponding to the rock mass deformation behavior in an approximately 120 m* 200 m area. To estimate in situ stress state around that area, a back analysis method considering the existence of faults and fractures around the gallery was developed. The analyzed results showed a good agreement with the trend of in situ stress state estimated from hydraulic fracturing method.

JAEA Reports

Measurement of rock mass deformation around the closure test drift during groundwater recovery experiment at 500m depth of Mizunami Underground Research Laboratory

Kuwabara, Kazumichi*; Aoyagi, Yoshiaki; Ozaki, Yusuke; Matsui, Hiroya

JAEA-Research 2017-002, 39 Pages, 2017/03

JAEA-Research-2017-002.pdf:3.58MB

Authors developed a displacement meter using optical fiber sensor. The displacement meter can be set at any locations in a borehole and guarantee the measurement accuracy up to 5MPa. Total twelve displacement meters were installed in three boreholes to measure the rock mass displacement during groundwater recovery test. The measurement of the rock mass displacement was stated on March, 27, FY 2014. During the first and second groundwater recovery experiments, compressive displacements were observed close to the closure test drift wall. Magnitude of the measured displacements, except vicinity of test drift wall, was smaller than that of calculated under the assumption of it is an isotropic elastic material.

Journal Articles

Tunnel support design for anisotropic stress state and comparison between in-situ convergence results and calculated results

Motoshima, Takayuki*; Yabuki, Yoshio*; Minamide, Masashi*; Nago, Makito*; Aoyagi, Kazuhei

Tonneru Kogaku Hokokushu (CD-ROM), 24, p.I_10_1 - I_10_5, 2014/12

Economic tunnel support design for Horonobe underground research laboratory was obtained according to the relationship in the direction of the initial stress and the direction of excavation. The authors compared between the in situ convergence results and calculated results in order to investigate the validity of initial stress measurements. As a result, a positive correlation was observed between the in situ convergence results and calculated results, and the difference between the two was able to be explained by the difference between the assumed deformation coefficient and the measured coefficient. From these results, the measurement results of the initial stress performed in the surface based investigation has been confirmed almost reasonable.

Journal Articles

Charge collected in Si MOS capacitors and SOI devices p$$^{+}$$n diodes due to heavy ion irradiation

Hirao, Toshio; Laird, J. S.; Onoda, Shinobu; Shibata, Toshihiko*; Wakasa, Takeshi; Yamakawa, Takeshi; Abe, Hiroshi; Takahashi, Yoshihiro*; Onishi, Kazunori*; Ito, Hisayoshi

Proceedings of 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.105 - 109, 2004/10

no abstracts in English

Journal Articles

Heavy-ion induced current in MOS structure

Takahashi, Yoshihiro*; Shibata, Toshihiko*; Murase, Yuji*; Onishi, Kazunori*; Hirao, Toshio; Kamiya, Tomihiro

Proceedings of 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.111 - 114, 2004/10

no abstracts in English

Journal Articles

Design and stress analysis of support structure of toroidal field coil for the JT-60SC

Tsuchiya, Katsuhiko; Kizu, Kaname; Miura, Yushi; Ando, Toshinari*; Sakasai, Akira; Matsukawa, Makoto; Tamai, Hiroshi; Ishida, Shinichi

IEEE Transactions on Applied Superconductivity, 14(2), p.1427 - 1430, 2004/06

 Times Cited Count:1 Percentile:87.89(Engineering, Electrical & Electronic)

no abstracts in English

JAEA Reports

None

*

JNC-TN1400 2001-013, 70 Pages, 2001/08

JNC-TN1400-2001-013.pdf:5.13MB

no abstracts in English

JAEA Reports

Sampling of rock block for water flow calibration on LABROCK

Uchida, Masahiro;

JNC-TN8410 2001-016, 36 Pages, 2001/05

JNC-TN8410-2001-016.pdf:1.53MB

This technical report summarizes sampling of the natural rock including conductive fracture. Hydraulic test was conducted at the target fracture prior to excavation. Objective of the sample was to reproduce same transmissivity at LABROCK by adjusting normal stress. This report was originally compiled by PNC in october, 1993.

JAEA Reports

Excavation and preparation rock block sample for LABROCK

Uchida, Masahiro;

JNC-TN8410 2001-015, 35 Pages, 2001/05

JNC-TN8410-2001-015.pdf:1.73MB

This technical report summarizes excavation and preparation of the natural rock block sample used in LABROCK. This report was originally compiled by PNC in March, 1993.

JAEA Reports

None

; ; ; Yamazaki, Toshihiko; ; Kondo, Toshinari*

JNC-TN8430 99-004, 64 Pages, 1999/03

JNC-TN8430-99-004.pdf:3.92MB

None

Journal Articles

Segmental motion of supercooled random copolyester studied by neutron polarization analysis

Koizumi, Satoshi; Inami, Toshiya

Macromolecules, 32(17), p.5613 - 5621, 1999/00

 Times Cited Count:4 Percentile:75.44(Polymer Science)

no abstracts in English

Journal Articles

Elastic neutron scattering observation on non-gaussian behavior for highly aligned copolyester glass

Koizumi, Satoshi

Physica B; Condensed Matter, 241-243, p.973 - 975, 1998/00

 Times Cited Count:1 Percentile:87.77

no abstracts in English

Journal Articles

Laser-induced photothermal displacement spectroscopy (LIPDS) for speciation of lanthanides and actinides

Kimura, Takaumi; Kato, Yoshiharu; Yoshida, Zenko

Radiochimica Acta, 82, p.141 - 145, 1998/00

no abstracts in English

Journal Articles

A Novel laser-induced photothermal displacement spectroscopy (LIPDS) for detection and speciation of a metal ion in aqueous solution

Kimura, Takaumi; Kato, Yoshiharu; Yoshida, Zenko

Journal of Nuclear Science and Technology, 34(7), p.717 - 719, 1997/07

 Times Cited Count:1 Percentile:84.72(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

JAEA Reports

None

PNC-TJ1187 96-002, 443 Pages, 1996/08

PNC-TJ1187-96-002.pdf:12.93MB

None

JAEA Reports

None

Yamaguchi, Akira

PNC-TN9420 96-049, 15 Pages, 1996/07

PNC-TN9420-96-049.pdf:0.34MB

None

JAEA Reports

None

PNC-TJ1635 96-001, 14 Pages, 1996/03

PNC-TJ1635-96-001.pdf:3.48MB

no abstracts in English

47 (Records 1-20 displayed on this page)