This publication elaborates the technical basis for the use of seismic isolation systems in nuclear installations. There are
many benefits of seismic isolation in design and construction of new facilities and in the retrofitting of existing nuclear
installations. Observations of well-designed, installed and maintained isolated structures show a no damage behaviour that
corresponds to expectations. This publication presents the current status of practice and use of seismic isolation systems
for nuclear installations. Since it relates to a number of IAEA Safety Standards, it complements these on the technical aspects
related to usage of seismically isolation for structures, systems and components in nuclear installations. It will be of interest
to all those concerned with seismic analysis, seismic design, and seismic safety evaluation for such installations.