Garigliano Nuclear Power Plant:
Seismic Evaluation Of The Turbine Building
Author(s)
P. Palumbo, L. Gramiccia, S. Cardellicchio, E. Faccioli & M. Villani
Abstract
The Italian Garigliano Nuclear Power Plant (NPP) started its energy production
in 1963. At present it is in the decommissioning stage. In order to get a proper
management of the radioactive waste that will be produced during the
dismantling operations it has been considered convenient to convert the turbine
building of the plant into a temporary waste repository. This decision posed a
remarkable seismic safety assessment issue. As a matter of fact, the challenge
was to extend, in satisfactory safety conditions, the use of an important facility
that has reached the end of its designed lifetime and to have this extended use
approved by nuclear safety agencies. In this context many tasks have been
accomplished, of which the most important are: (a) a new appraisal of site
seismic hazard; (b) the execution of many investigations and testing on the
construction materials; (c) the set up of a detailed 3D finite element model
including the explicit representation of foundation piles and soil; (d)
consideration of soil structure kinematic and dynamic interaction effects. This
paper describes the adopted seismic safety assessment criteria which are based
on a performance objectives design approach. While performance based design
is the approach currently recommended by European Regulations to manage
seismic risk and it is fully incorporated in the Italian code for conventional
buildings, bridges and plants, NPP are not explicitly considered. Therefore it was
necessary to delineate a consistent interpretation of prescribed rules in order to
properly select the maximum and operating design earthquakes on one side and
corresponding acceptable limit states on the other side. The paper further
Keywords
nuclear power plant, radioactive waste, repository, seismic hazard, existing building
Related Book
Other papers in this volume
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