In order to contribute to the training of young scientists working in the energy sector or intending to do so, the European (EPS) and the Italian (SIF) Physical Societies started the Joint EPS-SIF International School on Energy as a collaborative initiative. The Courses are foreseen to take place on a biennial basis in the beautiful venue of Villa Monastero in Varenna, Lake Como, Italy. The 8th Course (2025) of the School will then be devoted to: NUCLEAR ENERGY AND ITS CHALLENGING NEW TECHNOLOGIES.