1. A. Vertkov et al., SC “Red Star”, Moscow, Russia
The concept of lithium based plasma-facing elements for steady state fusion tokamak-reactor and its experimental validation
A. Vertkov et al., SC “Red Star”, Moscow, Russia
1. Concept of Liquid Metal PFE for steady state operation:
Plasma facing material – 0.5 mm thick of W felt based CPS with liquid Lithium. Li amount – 100 g/m2
2 mm/s Lithium flow rate for CPS filling, removal of trapped tritium and accumulated impurities
Thin-wall PFE design – 2 mm first wall thick
67% W fiber+ 33% steel Eurofer – first wall material with high heat conductivity (~90 W/mK), and mechanical properties (sy~ 480 MPa , sb~ 480 MPa)
Water / gas spray coolant – 2 bar pressure, kW m-2 K-1 heat transfer coefficient , coolant consumption: water Gw~ 1 liter / s m2 , gas Ggas~ 25 liter / s m2
Surface temperature ~500 oC at power flux P=10 MW/m2, ~700oC at P=17 MW/m2
2. Design of module of divertor target plate for DEMO type tokamak
New
New
New
Temperature Tmax<500oC
Stress, Smax=250 MPa
Main design scheme
Temperature and stress analysis