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Report No.

Design study for seismic isolation system of fast reactor JSFR, 1; Concept of seismic isolation system

Sakamoto, Yoshihiko ; Fukasawa, Tsuyoshi*; Kawasaki, Nobuchika ; Okamura, Shigeki*

Design study of an FBR demonstration facility is now in progress for the sodium-cooled fast reactor (JSFR). In JSFR, a seismic isolation system is adopted from the viewpoint of reduction in seismic force to major components taking into account the characteristics of the fast reactor. After the 2011 off the Pacific coast of Tohoku Earthquake, a design earthquake was revised for investigation to ensure seismic resistance under a severer seismic condition. Moreover, countermeasures against various external hazards such as tsunami, etc. were investigated for the purpose of establishment of safety design guidelines and enhancement of safety. This presentation introduces the design earthquake and the seismic isolation system concept responding to the external hazards with issues for realization.



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