Heterogeneous Description of Fuel Assemblies for Correct Estimation of Control Rods Efficiency in BR-1200

Abstract

This paper describes the development of full-scale models of the BR-1200 reactor for the MCU-FR code with a homogeneous and heterogeneous description of fuel assemblies’ geometry. The correctness of the control rods efficiency calculation in a homogeneous model is analyzed. The control rods requiring heterogeneous modeling are defined. 

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