Lead-cooled Fast Reactors represent a promising reality among the concepts proposed by the Generation IV Forum, allowing the production of cheap and safe electricity while exploiting the fast spectrum of neutrons to burn plutonium and minor actinides. Nowadays, the closure of the fuel cycle represents a key point for the discouragement of proliferation actions and the utilisation of nuclear fuel. Thus, one of the purposes of the future nuclear fission reactors based on liquid metals is to address the closure of the fuel cycle. In this framework, one possibility is to enhance the utilisation of wasted plutonium coming from the actual Light Water Reactors (LWRs) that is currently planned to be stored in geological repositories.