Analysis of the Dynamic Behavior and Stress-Strain State of NPP Containment under Nonstationary Impacts
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Keywords

NPP, NPP unit, containment, reinforced concrete, steel liner, tendon, pre-stress system, design-basis accident, emergency pressure, dynamic behavior, design-basis earthquake, nuclear and radiation safety, stress-strain state, finite element method, reactor hall

How to Cite

Lugovyy, P., Kryts’kyi, V., & Kryts’ka, N. (2016). Analysis of the Dynamic Behavior and Stress-Strain State of NPP Containment under Nonstationary Impacts. Nuclear and Radiation Safety, (3(71), 38-47. https://doi.org/10.32918/nrs.2016.3(71).08

Abstract

The paper presents the analysis of dynamic behavior of the reinforced concrete containment of NPP unit under the combined effect of internal pressure shock caused by the accident in the reactor hall and seismic impact of design-basis earthquake using the finite element method (FEM) and DIPROS software. Using the modal analysis and numerical solution of the FEM equations of containment concrete, the stress-strain state of the building structure in the post-accident period was defined. It is shown that the maximum intensity of the stresses in the steel liner of the containment does not exceed the yield strength of the steel liner material. Accordingly, the liner integrity is preserved, the containment remains operable and ensures compliance of radiation safety requirements.

https://doi.org/10.32918/nrs.2016.3(71).08
ARTICLE PDF

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