2020

García, Manuel; Tuominen, Riku; Gommlich, Andre; Ferraro, Diego; Valtavirta, Ville; Imke, Uwe; van Uffelen, Paul; Mercatali, Luigi; Sanchez-Espinoza, Victor; Leppänen, Jaakko; Kliem, Sören

<p>This work presents the results for a coupled neutronic-thermalhydraulic-thermomechanic pin-level depletion calculation of a PWR fuel assembly using Serpent2-SUBCHANFLOWTRANSURANUS. This tool is based on a semi-implicit depletion scheme with pin-by-pin feedback, mesh-based field exchange and an object-oriented software design. The impact of including fuel-performance capabilities is analyzed, with focus on high-burnup effects. The treatment of the Doppler feedback to the neutronics is examined as well, in particular the use of radial fuel-temperature profiles or radially averaged values.</p>