Detailed phase-out TRU transmutation scenarios studies based on fast neutron Ads Systems

This paper presents a study of a phase-out direct TRU transmutation strategy consisting on several phases with an evolving deployment of reprocessing and transmutation plants. Detailed EVOLCODE reactor calculations (Monte Carlo transport + fuel depletion) combined with a scheme for the transmutation plant and reprocessing facilities deployment is presented for a case with a total amount of TRUs of 100 t of heavy metal coming from a standard LWR with an average burn-up of 40 GWd/THM. The presented results include the required reprocessing capacity, the profile of the installed power for the proposed ADS deployment, the evolution of the fuel composition and the evaluation of the wastes going to the final repository. Several aspect discussed in this paper for the phase-out scenario also apply for other time dependent P and T scenarios like the approach to the equilibrium and the scenarios of transitions between different fuel cycles (LWR to IFR). (author)