Seismic Qualification of Heatexchanger at WWER-1000 MW Type NPP

摘要

The objective of the study is seismic qualification of already installed heat exchanger and its supporting structure in operating WWER-1000 MW type NPP. The criteria of ASME code are applied both for the equipment and for the supporting structure. Detailed finite element model is developed to simulate the operating parameters and as-built conditions of the equipment and its supports. The plant specific floor response spectra are used in the analysis. The seismic adequacy of the heat exchanger is clarified on the basis of the results from the study. It is estimated that these conclusions are also valid for similar equipment at another unit of the same NPP.