Integrated design of breeding blanket and ancillary systems related to the use of helium or water as a coolant and impact on the overall plant design

• DOI: 10.1016/j.fusengdes.2021.112933
• Publication Date: 2021-11-17T12:38:58Z
• Authors: G.A. Spagnuolo; R. Arredondo; L.V. Boccaccini; P. Chiovaro; S. Ciattaglia; F. Cismondi; M. Coleman; I. Cristescu; S. D'Amico; C. Day; A. Del Nevo; P.A. Di Maio; M. D'Onorio; G. Federici; F. Franza; A. Froio; C. Gliss; F.A. Hernández; A. Li Puma; C. Moreno; I. Moscato; P. Pereslavtsev; M.T. Porfiri; D. Rapisarda; M. Rieth; A. Santucci; J.C. Schwenzer; R. Stieglitz; S. Tosti; F.R. Urgorri; M. Utili; E. Vallone
• Keywords: Breeder (animal); Decay heat; Fusion power

Currently, for the EU DEMO, two Breeding Blankets (BBs) have been selected as potential candidates integration in reactor. They are Water Cooled Lithium Lead and Helium Pebble Bed BB concepts. The variants together with associated ancillary systems drive design of overall plant. Therefore, a holistic investigation issues derived by installation its has performed. related to water activation due 16N 17N isotopes impact on primary heat transfer investigated providing guidelines dedicated solution safety devices isolation valves. tritium retention permeation rates through blanket also assessed taking into account different operating points both ancillaries comparing, when possible, releases limits. Moreover, start-up inventory well uncertainties Tritium Ratio (TBR) auxiliary within Vacuum Vessel studied. Finally, concepts like Pressure Suppression System is described particular focus measures that should be implemented according considered concept. All these aspects then taken future developments during Concept Design Phase.