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to severe earthquake shaking. Although seismic isolation has been deployed in nuclear structures in France and South
Africa, it has not seen widespread use because of limited new build nuclear construction in the past 30 years and a lack of
guidelines, codes and standards for the analysis, design and construction of isolation systems specific to nuclear structures.
The funding by the United States Nuclear Regulatory Commission of a research project to the Lawrence Berkeley
National Laboratory and MCEER/University at Buffalo facilitated the writing of a soon-to-be-published NUREG on
seismic isolation. Funding of MCEER by the National Science Foundation led to research products that provide the
technical basis for a new section in ASCE Standard 4 on the seismic isolation of safety-related nuclear facilities. The
performance expectations identified in the NUREG and ASCE 4 for seismic isolation systems, and superstructures and
substructures are described in the paper. Robust numerical models capable of capturing isolator behaviors under extreme
loadings, which have been verified and validated following ASME protocols, and implemented in the open source code
OpenSees, are introduced.
to severe earthquake shaking. Although seismic isolation has been deployed in nuclear structures in France and South
Africa, it has not seen widespread use because of limited new build nuclear construction in the past 30 years and a lack of
guidelines, codes and standards for the analysis, design and construction of isolation systems specific to nuclear structures.
The funding by the United States Nuclear Regulatory Commission of a research project to the Lawrence Berkeley
National Laboratory and MCEER/University at Buffalo facilitated the writing of a soon-to-be-published NUREG on
seismic isolation. Funding of MCEER by the National Science Foundation led to research products that provide the
technical basis for a new section in ASCE Standard 4 on the seismic isolation of safety-related nuclear facilities. The
performance expectations identified in the NUREG and ASCE 4 for seismic isolation systems, and superstructures and
substructures are described in the paper. Robust numerical models capable of capturing isolator behaviors under extreme
loadings, which have been verified and validated following ASME protocols, and implemented in the open source code
OpenSees, are introduced.