[2F04-09] Sodium-cooled Fast Reactor

[2F05] Development of Three-Dimensional Seismic Isolation System for Sodium-cooled Fast Reactor

*Tomohiko Yamamoto¹, Masashi Miyazaki¹, Tomoyoshi Watakabe¹, Takayuki Miyagawa², Masato Uchita², Shinobu Yokoi³, Takahiro Somaki⁴ (1. Japan Atomic Energy Agency, 2. Japan Atomic Power Company, 3. Mitsubishi FBR Systems Inc., 4. Obayashi Corporation)

Keywords:Pool type SFR, Three-dimensional Seismic Isolation System, Laminated Rubber Bearing, Disc Spring, Oil Damper

Horizontal seismic isolation system using a laminated rubber bearing has been studied for a long time for improvement of seismic resistance of Sodium-cooled fast reactor.
Recently, the authors are developing a three-dimensional seismic isolation system to respond to noto only horizontal but also vertical seismic motion in order to respond to increased seismic motion and improve the seismic resistance of large-diameter vessel.
This paper describes the development of a unit type three-dimensional seismic isolation system that can integrate horizontal and vertical seismic isolation functions.