Assessment Of The Floor Response Spectra Of The
Ignalina Nuclear Power Plant
Author(s)
R. Baušys, G. Dundulis, R. Kačianauskas, R. Markauskas,
S. Stupak & E. Ušpuras
Abstract
The floor response spectra of Ignalina nuclear power plant (NPP) containing
RBMK-1500 type multi-channel graphite-moderated water-cooled reactors are
investigated. The building structure of Ignalina NPP is characterized by
structural elements with different stiffness properties, resulting in a complex
mixed structure. For this reason an accurate and detailed three-dimensional
model was considered.
The seismic input presents two cases of vertical and horizontal design basis
ground response spectra with 2% of critical damping. The free-field ground
response spectra is obtained on the basis of the latest seismic data and properties
of geological section of Ignalina NPP site, while two-dimensional finite element
(FE) soil-structure interaction analysis was carried out in order to assess the
effects on the input spectra.
The floor response spectra of the NPP structures are calculated by applying a
three-dimensional FE model. Assessment of the acceleration floor response
spectra is made at the drum-separator support level. Comparison of the results of
the 3D FE analysis with the results of the simplified \“stick” one-dimensional
column discrete-mass model is also provided.
Keywords: nuclear power plant, seismic analysis, finite element method, floor
response spectra.
1 Introduction
The Ignalina NPP located in Lithuania, close to the borders of Belarus and
Latvia, contains multi-channel graphite-moderated water-cooled so-called
Keywords
nuclear power plant, seismic analysis, finite element method, floor
response spectra.
Related Book
Other papers in this volume
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