Neutronic calculations of the U3Si LEU as a dispersed fuel for Low-Power Research Reactors

► The use of a LEU fuel (U3Si) in Miniature Neutron Source Reactors is investigated. ► Only a mixed core (33% HEU, and 67% LEU fuels) can be used to run the reactor. ► The reactor thermal power should be increased to 32 kW instead of 30 kW. ► Safety margins decrease for both normal and accidental operation conditions.