On the Supplementary Feedback Effect Specific for Accelerator-Coupled Systems ACS

In this work a new approach to the realisation of an accelerator-coupled hybrid system (ACS) is proposed. A significant improvement of the feedback effect due to the particularities of the neutron production in a spallation target is expected. In the present study, we explain the principles of system functioning as well as the advantages and disadvantages of the proposed concept. The quantitative analysis of the innovative ACS operation is based on a generalised point kinetics approach. In the framework of this simplified model, we show that the particular dependence of the spallation neutron yield allows for the creation of a supplementary negative feedback effect (Doppler-like). Implementation of this concept should compensate, to some extent, the eventual feedback degradation in the cores dedicated to the transmutation of nuclear waste.