DEVELOPMENT OF THREE-DIMENSIONAL SEISMIC ISOLATION SYSTEMS FOR FAST REACTOR APPLICATION

Abstract

A project has been undertaken in Japan to develop three-dimensional (3D) seismic isolation systems for advanced fast reactors application, under the sponsorship of the Japanese government. Within this program, 3D base isolation systems with pneumatic and/or hydraulic devices are developed. A vertical isolation system with coned dish springs is also developed for reactor components with combined use of horizontal base isolation. This paper depicts a whole picture of the project and describes the current status of the development efforts.