DOI: 10.14489/td.2017.02.pp.054-057

Desjatnikov V. E., Sidorov A. Yu., Ryabtcov A. V., Lapshin D. A.
DESIGN AND EXPERIMENTAL STUDY OF STRENGTH CHARACTERISTICS OF THE ASSEMBLY CORE WHEN EXPOSED TO LONGITUDINAL IMPACT
(pp. 54-57)

Abstract. The article discusses the computational and experimental study of strength characteristics of the fuel assemblies when exposed to longitudinal shock. The object of the test is to build the layout of steel to protect the core of the reactor facility. The paper presents calculations of the dynamic strength of the fuel assemblies from the reactor plants. The results of stress-strain state and acceleration levels affecting the assembly during free fall vertically are obtained. To determine the actual levels of acceleration and the stress (strain), taking into account the effect of operating conditions, field experiments were conducted to simulate an emergency drop assembly with loading and unloading of the reactor pit. These studies were conducted as a verification of the account code, allowing for the study of design solutions.Measurements of deformations occurring in the assembly under the influence of lon-gitudinal shock was performed by using a strain gauge of type FLA-5-11 and information-measuring complex MGCplus. The accelerometers of Type 4344, Measurement and Computing Complex MIC-200 with an amplifier charge the ME-908 were used to estimate the acceleration measurement system. The experimental data obtained in the fall to protect the steel assembly layout allowed to verify the computational model developed in the PC "ANSYS", for all other types and modifications of the fuel assemblies. Studies have shown that the calculated and experimental values of the accelerations and stress (strain) correlate satisfactorily.

Keywords: mock assembly of steel protection, acceleration, strain, stress.

 

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