High performance PbLi blanket

Author

Tillack, M.S. ; Malang, S.

Author_Institution

Fusion Energy Res. Program, California Univ., San Diego, La Jolla, CA, USA

Volume

2

fYear

1997

fDate

6-10 Oct 1997

Firstpage

1000

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1997. 17th IEEE/NPSS Symposium

Conference_Location

San Diego, CA

Print_ISBN

0-7803-4226-7

Type

conf

DOI

10.1109/FUSION.1997.687793

Filename

687793