In Japan, a number of three-dimensional base isolation systems have been studied for application to new nuclear plant concepts such as the FBR, but these efforts have not so far yielded practically applicable results. The impeding factor has been the difficulty of obtaining an adequate capacity on the vertical isolator for supporting the mass of an actual structure and for suppressing rocking motion. In this paper, we propose a new three-dimensional isolation system that should solve the foregoing problem. The system is constituted of a set of hydraulic load-carrying cylinders connected to accumulator units containing compressed gas, a set of rocking-suppression cylinders connected in series, and a laminated rubber bearing laid under each load-carrying cylinder. The present paper covers a basic examination for applying the proposed system to a FBR plant now under development in Japan. In order to verify expected system performance, the load-carrying cylinders were first tested independently of rocking-suppression cylinders, and this was followed by integrated dynamic test of the system incorporating both load-carrying and rocking suppression cylinders. Response analysis reflecting the test results has indicated the proposed system to be well applicable to the envisaged commercialized FBR. The study was undertaken as part of a research and development project sponsored by the government for realizing a three-dimensional seismic isolation system applicable to future FBR.
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ASME/JSME 2004 Pressure Vessels and Piping Conference
July 25–29, 2004
San Diego, California, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4681-4
PROCEEDINGS PAPER
Study on Three-Dimensional Seismic Isolation System for Next-Generation Nuclear Power Plant: Hydraulic Three-Dimensional Base Isolation System
Takahiro Shimada,
Takahiro Shimada
Ishikawajima-Harima Heavy Industries Company, Ltd., Yokohama, Japan
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Tatsuya Fujiwaka,
Tatsuya Fujiwaka
Ishikawajima-Harima Heavy Industries Company, Ltd., Yokohama, Japan
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Satoshi Moro
Satoshi Moro
Japan Atomic Power Company, Tokyo, Japan
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Takahiro Shimada
Ishikawajima-Harima Heavy Industries Company, Ltd., Yokohama, Japan
Tatsuya Fujiwaka
Ishikawajima-Harima Heavy Industries Company, Ltd., Yokohama, Japan
Satoshi Moro
Japan Atomic Power Company, Tokyo, Japan
Paper No:
PVP2004-2931, pp. 35-42; 8 pages
Published Online:
August 12, 2008
Citation
Shimada, T, Fujiwaka, T, & Moro, S. "Study on Three-Dimensional Seismic Isolation System for Next-Generation Nuclear Power Plant: Hydraulic Three-Dimensional Base Isolation System." Proceedings of the ASME/JSME 2004 Pressure Vessels and Piping Conference. Seismic Engineering, Volume 2. San Diego, California, USA. July 25–29, 2004. pp. 35-42. ASME. https://doi.org/10.1115/PVP2004-2931
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