[2F19-22] Core Design 1 (Na-cooled Reactor)

[2F22] Development of Innovative Nuclear Waste Burning System by Fast Reactor Cycle Using Pu Metallic Fuel with MA

(10)Heterogeneity Effect of Fuel and Neutron Moderator in TRU Metallic Fuelled Core

*MITSUAKI YAMAOKA¹, YASUYUKI MORIKI¹, AKIHIRO HARA¹, REI KIMURA¹, YASUSHI TSUBOI¹, KAZUO ARIE¹ (1. Toshiba Corporation Energy Systems & Solutions Campany)

Keywords:Uranium-free TRU Fuel, Metallic Fuel Fast Reactor, Neutron Moderator, Heterogeneity Effect, Reactivity Coefficients

Increase of absolute value of Doppler coefficient and decrease of coolant void reactivity are key issues in core design of uranium-free metallic fuelled fast reactor core loaded with TRU (Pu and minor actinides) . A fast reactor core loaded with neutron moderator is proposed to solve the issues. Heterogeneity effect of fuel and neutron moderator on k-effective and reactivity coefficients in the fast reactor core was studied with the deterministic method and the Monte Carlo method.