Conference Proceedings Paper
Fuel Composition Optimization in a 78-Element Fuel Bundle for use in a Pressure Tube Type Supercritical Water-Cooled Reactor
36th Annual CNS-CNA Student Conference - 2012 June 12
David Hummel (McMaster University )
David Novog (McMaster University )
A 78-element fuel bundle containing a plutonium-thorium fuel mixture has been proposed for a Generation IV pressure tube type supercritical water-cooled reactor. In this work, using a lattice cell model created with the code DRAGON, the lattice pitch, fuel composition (fraction of PuO2 in ThO2) and radial enrichment profile of the 78-element bundle is optimized using a merit function and a metaheuristic search algorithm. The merit function is designed such that the optimal fuel maximizes fuel utilization while minimizing peak element ratings and coolant void reactivity. A radial enrichment profile of 10 wt%, 11 wt% and 20 wt% PuO2 (inner to outer ring) with a lattice pitch of 25.0 cm was found to provide the optimal merit score based on the aforementioned criteria.
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