Abstract
A Fusion–Fission Hybrid Reactor (FFHR) is made of a subcritical reactor driven by the neutrons generated in a nuclear fusion device. The fast neutron spectrum produced by this system could be able to burn actinides from the spent nuclear fuel. Unfortunately, current fusion devices are unable to provide an adequate neutron yield with reasonable spending of energy. However, it is possible to design the subcritical set to multiply considerably the neutron flux by using the so-called multiplying cascades. In addition, given its simplicity, the Dense Plasma Focus (DPF) is an interesting candidate as a neutron source. In this work, we analyze a concept of a metallic-fuel hybrid reactor based on a subcritical set and driven by a DPF as a neutron source. Their spectra are evaluated to determine if they are compatible with the operation of a fast reactor. The energy balance is also studied to find its ability to be self-sufficient when using an existing DPF. Finally, its capability to generate tritium from its lithium blanket is also analyzed. The system is self-sustainable.
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