Title :
High performance PbLi blanket
Author :
Tillack, M.S. ; Malang, S.
Author_Institution :
Fusion Energy Res. Program, California Univ., San Diego, La Jolla, CA, USA
Abstract :
A novel blanket concept is described. The proposed design Is a dual coolant concept based on ferritic steel as structural material using helium to cool the first wall. The temperature of the entire steel structure is maintained below the 550°C limit. The breeding zone is cooled by circulating the liquid metal breeder to external heat exchangers. Flow channel inserts are employed in the poloidal liquid breeder ducts, serving both as electrical and thermal insulator between the flowing liquid metal and the steel structure. In this way, a liquid metal exit temperature of about 700°C is achievable, allowing either an advanced Rankine steam cycle or closed-cycle helium gas turbine (Brayton cycle) as the power conversion system. A gross thermal efficiency of about 45% can be achieved with either system
Keywords :
fusion reactor blankets; fusion reactor design; lead alloys; lithium alloys; 700 C; Brayton cycle; He; PbLi; advanced Rankine steam cycle; breeding zone; closed-cycle gas turbine; dual coolant concept; ferritic steel; first wall; fusion reactors; gross thermal efficiency; heat exchangers; high performance blanket; liquid metal breeder; poloidal liquid breeder ducts; power conversion system; structural material; Building materials; Coolants; Dielectric liquids; Dielectrics and electrical insulation; Ducts; Helium; Metal-insulator structures; Steel; Temperature; Turbines;
Conference_Titel :
Fusion Engineering, 1997. 17th IEEE/NPSS Symposium
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4226-7
DOI :
10.1109/FUSION.1997.687793
