Evaluation of wrapper tubes temperature of neutron fast reactors by Transcoeur-2

This paper deals with the thermal loading estimation of wrapper tubes by TRANSCOEUR-2 code. This estimation needs the knowledge of two temperature fields: the first is the peripheral sub-channels temperature of each sub-assembly computed by the design field computed by the thermohydraulic code TRIO-Vf with boundary conditions coming from CADET. The modeling of each code is presented as the first application of TRANSCOEUR-2 is performed on the European Fast Reactor (EFR) Core Design 6/92 (CD 6/91) in the nominal power conditions. The results show a temperature variation between the bottom and the top of the sub-assemblies fuel columns of 110 Celsius grades in the center of the core and 95 celsius grades at its periphery. The wrapper tubes temperatures are higher in the center than in the external side of the core. (authors). 2 refs., 8 figs