000019640 001__ 19640
000019640 005__ 20170118182330.0
000019640 04107 $$aeng
000019640 046__ $$k2017-01-09
000019640 100__ $$aKumar, Manish
000019640 24500 $$aResponse of a Nuclear Power Plant Seismically Isolated Using Sliding Bearings Subjected To Severe Ground Shaking

000019640 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019640 260__ $$b
000019640 506__ $$arestricted
000019640 520__ $$2eng$$aNuclear power plants (NPPs) are required to be designed for earthquakes with long return periods (e.g., 100,000 years). Seismic isolation filters a considerable fraction of earthquake input energy, and is a viable strategy to protect the structural system and internal equipment of NPPs from severe ground shaking. This paper presents key response quantities of an NPP seismically isolated using single concave Friction Pendulum™ (FP) bearings subjected to ground motions consistent with the design basis (10,000-year) and extended design basis (100,000-year) shaking at the Diablo Canyon Nuclear Generating Station in California. Two models were developed to simulate the response of the isolated NPP. The structural system, internal equipment and isolation system were explicitly considered in the first model, while the second model comprised a macro sliding bearing. The coefficient of friction at the sliding surface of the FP bearings was updated during the course of earthquake shaking with instantaneous values of sliding velocity, temperature at the sliding surface and axial pressure on the bearing. Isolation system displacement can be computed using the simplified macro model of the NPP subjected to the two orthogonal horizontal components of ground motions. The temperature dependence of the coefficient of friction at the sliding surface should be considered in the calculation of isolation system displacement; ignoring the heating effects may lead to unconservative estimates. Floor spectral ordinates should be computed using a detailed three-dimensional finite element model of the NPP subjected to the two orthogonal horizontal and vertical components of ground motions. The choice of friction model at the sliding surface does not significantly influence the floor spectral ordinates, especially at a lower elevation.

000019640 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019640 653__ $$aSeismic isolation; sliding bearings; nuclear power plant; temperature dependence of friction

000019640 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019640 720__ $$aKumar, Manish$$iWhittaker, Andrew$$iConstantinou, Michael
000019640 8560_ $$ffischerc@itam.cas.cz
000019640 8564_ $$s1145234$$uhttps://invenio.itam.cas.cz/record/19640/files/4072.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4072.
000019640 962__ $$r16048
000019640 980__ $$aPAPER