Conceptual Designing of Reduced-Moderation Water Reactor (RMWR)

Abstract

Based on the experienced light water reactor technology, conceptual design studies on advanced water-cooled reactors have been performed. They are named "Reduced-Moderation Water Reactor" (RMWR) with the high conversion ratio more than 1.0 and the negative void reactivity coefficients. Several concepts have been successfully established for them based on the neutronics calculations. Also the thermal hydraulic investigation has been performed for each concept, including the basic critical heat flux experiments at 15.5 MPa in the triangular tight-lattice core configuration. Through this thermal hydraulic investigation, the feasibility of each design is being confirmed.