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

6533b85cfe1ef96bd12bd3fd

RESEARCH PRODUCT

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

A. Del Nevo Salvatore D’amico Pierluigi Chiovaro Lorenzo Virgilio Boccaccini F.r. Urgorri Maria Teresa Porfiri Antonio Froio Alessia Santucci Fabio Cismondi Sergio Ciattaglia Ion Cristescu Silvano Tosti A. Li Puma R. Arredondo Michael Rieth C. Gliss Robert Stieglitz P.a. Di Maio Matteo D’onorio David Rapisarda G. Federici Carlos Hugo Moreno M. Coleman F. Franza E. Vallone Ch. Day J.c. Schwenzer Marco Utili I. Moscato Pavel Pereslavtsev Francisco A. Hernández Gandolfo Alessandro Spagnuolo

subject

Technology Nuclear engineering integration issues Breeding blanket; Integration issues; Water activation; Tritium management; VVPSS chemistry.chemical_element Isolation valve System safety Blanket Tritium 01 natural sciences 010305 fluids & plasmas VVPSS 0103 physical sciences Fusion reactors -- Design and construction General Materials Science 010306 general physics water activation Settore ING-IND/19 - Impianti Nucleari Helium Civil and Structural Engineering Integrated design breeding blanket; integration issues; tritium management; VVPSS; water activation breeding blanket Mechanical Engineering Water -- Thermal properties Coolant tritium management Nuclear Energy and Engineering chemistry Heat transfer Environmental science Helium -- Thermal properties Plant design ddc:600 Power-plants -- Design and construction

description

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

year	journal	country	edition	language
2021-12-01

10.1016/j.fusengdes.2021.112933 http://hdl.handle.net/11573/1611952