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Safety Assessment Group

Outline

Current Research Theme

• Research for energy storage and transportation system
• Research on long-term stability evaluation of underground storage
• Research for construction of underground pipeline
• Advanced technology for gas monitoring
• Study on flame acceleration and fire prevention
• Database of hazard and recovery for energy facilities
• Statistical study on hazard process and protection technology

Topics

• Fault micro-behavior Project

Published Papers

1. Masayuki Kosugi, Marek Kwasniewski and Manabu Utagawa: "Characterization and behavior evaluation of jointed rock masses in tunneling", Polish Journal of Tunneling (contributed), 2001.
2. Manabu Utagawa, Masahiro Seto, Masayuki Kosugi, Kunihisa Katsuyama and Kikuo Matsui: "The Evaluation of Fracture Toughness of Rock in Wet and Chemical Condition", Proceedings of the 99 Japan-Korea Joint Symposium on Rock Engineering, 20, p.573-578, 1999.
3. Yuichi Nakagawa: "A comparative study of bench-scale flammability properties of electric cables with different covering materials", Journal of Fire Sciences, Vol.16, No.3, p.179-205, 1998.
4. Manabu Utagawa, Masahiro Seto, Kunihisa Katsuyama and Tomoyuki Takemura: "Acoustic Emission Behavior during Excavation of a Large Cavern in a deep mine", Proceedings of the 4th International Symposium on Rock bursts and Seismicity in Mines, Vol.4, p.187-192, 1997.
5. Manabu Utagawa, Masahiro Seto and Kunihisa Katsuyama; Estimation of Initial stress by deformation rate analysis (DRA), Int. J. Rock Mech. Min. Sci., Vol.34, No.3, 1997.
6. Masayuki Kosugi, Haruyuki Ishihara and Mitsuo Nakagawa: "Tunnelling method coupled with joint monitoring and DEM analysis", Fractured and Jointed Rock Mass (Lake-taho), p.739-744, 1995.
7. Akio Tamai and Masayuki Kosugi: "Development and Field Application of Joint Deformeter and High-accuracy Extensometer", Mechanics of Jointed and Faulted Rock (MJFR-2), p.489-494, 1995.
8. Yuichi Nakagawa: "A note on an oxygen index test on electric cables", Journal of Fire Sciences, Vol.12, No.6, p.506-515, 1994.
9. Yuichi Nakagawa, Takeshi Komai and Makoto Kohno: "Ignition and flame propagation of electric cables in a laboratory-scale gallery fire test", Fire and Materials, Vol.16, No.4, p.181-186, 1992.

Staff