Abstract

Abstract In 2014, Indonesian government launched a program to build an Experimental Power Reactor, named Reaktor Daya Eksperimental (RDE), in South Tangerang, Banten. The RDE is a 10 MWt pebble-bed reactor utilizing TRISO fuel technology. A comprehensive neutronics and burnup performance evaluation on the RDE fuel loading schemes (once-through-then-out (OTTO) and multipass), fuel cycles (uranium and thorium) and optimum fuel compositions is conducted and reported in this paper. The optimum design parameters of the RDE are expected to contribute in minimizing the fuel cost, storage capacities, and other back-end environmental burden. The evaluation results show that OTTO fuel loading scheme is a better trade-off option considering the complexity of the mechanisms involved in the design. The optimal composition for uranium fuel cycle is 8 g heavy metal/pebble with U-235 content of 13.7 w/o for achieving the design target burnup of 80 GWd/t, while for thorium fuel cycle is 18.2 g/pebble with U-233 content of 7.2 w/o.

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