Authors & Affiliations

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

Dushev S.A. – Chief Designer of Fuel Handling Equipment, Cand. Sci. (Tech.), Afrikantov Experimental Design Bureau for Mechanical Engineering.
Kriukov A.N. – Deputy Head of Department, Afrikantov Experimental Design Bureau for Mechanical Engineering.
Lapshin D.A. – Head of Design Group, Cand. Sci. (Tech.), Afrikantov Experimental Design Bureau for Mechanical Engineering. Contacts: 15, Burnakovsky proezd, Nizhny Novgorod, Russia, 603074. Tel.:+7(831) 246-97-21; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Novinsky E.G. – Chief Specialist, Dr. Sci. (Tech.), Afrikantov Experimental Design Bureau for Mechanical Engineering.
Ryabtsov A.V. – Deputy Head of Department, Afrikantov Experimental Design Bureau for Mechanical Engineering.
Tatarsky A.M. – Design Engineer, Afrikantov Experimental Design Bureau for Mechanical Engineering.

Abstract

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.

Keywords
dynamic processes, plastic deformation, assessment of dropping process consequences, safe operation, software package, impact energy, deformation model

Article Text (PDF, in Russian)

References

UDC 539.3

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2018, issue 4, 4:7