Dushev S.A., Kriukov A.N., Lapshin D.A., Novinsky E.G., Ryabtsov A.V., Tatarsky A.M.
Afrikantov Experimental Design Bureau for Mechanical Engineering, Nizhny Novgorod, Russia
The paper provides the main results of deformation process analysis and assessment of consequences of an emergancy during in-reactor transportation.
Dropping computational analysis is carried out using dynamic analysis module LS-DYNA of certified ANSYS program package. The LS-DYNA module is intended for computational analysis of highly linear dynamic processes using explicit scheme of dynamic equation integration. The paper describes computational and experimental methods aimed at analyzing models of deformation of structural materials under the impact of static and dynamic loads and defines based on experimental studies the parameters of Jonson-Cook model from LS-DYNA library.
Mathematical analysis employs a verified model of behavior of the structural material used in BN-800 reactor fuel assemblies.
The obtained results made it possible to analyze the dropping process, define the plastic deformations that occur in all component parts of the fuel assemblies.
The application of a comprehensive approach implemented in this computational analysis made it possible to solve the problem related to reactor operation safety assurance under conditions applying moderate conservatism.
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