New advances in the conceptual design of a transmutation advanced device for sustainable energy applications (TADSEA)

摘要

The Transmutation Advanced Device for Sustainable Energy Applications (TADSEA) is a pebble-bed Accelerator Driven System (ADS) with a graphite-gas configuration. It is designed for nuclear waste transmutation and for obtaining heat at very high temperatures. In this paper, a new burnup strategy was modelled for obtaining a fuel composition in the equilibrium state such that it simulates a multi-pass scheme of the pebbles through the core. The heterogeneity of the pebbles was considered using a detailed model of the TRISO (tristructural-isotropic) particles. In this work, a body-centered cubic cell was considered for studying the heat transfer inside the spherical fuel elements, and the full height of the core was considered. During the steady state, the critical elements do not reach the temperature limit for this fuel type. In addition, CFD (Computational Fluid Dynamics) simulations considering coolant's mass flow rate reductions, in the main cooling system were performed.