FNSF reference parameters (system code + neutronics)

Geometry and Plasma
major radius R 4.8 m
minor radius a 1.2 m
elongation κ 2.2
triangularity δ 0.63
plasma currrent Ip 7.87 MA
toroidal field at 4.8 m BT 7.5 T
stored energy in plasma Wth 170 MJ
plasma effective charge Zeff 2.4
 
Powers
fusion power Pf 518 MW
alpha power Pα 104 MW
current drive power PCD 121 MW
core radiation power Prad,core 56 MW
divertor power Prad,div 177 MW
 
Neutron Wall Loads
machine average neutron wall load <Pn> 1.1 MW/m2
(surface 10 cm from plasma boundary)
peak neutron wall load (OB midplane) Pn,max 1.6 MW/m2
average NWL on outboard first wall <Pn,OBFW> 1.35 MW/m2
average NWL on inboard first wall <Pn,IBFW> 0.86 MW/m2
average NWL on outer divertor <Pn,Odiv> 0.35 MW/m2
average NWL on inner divertor <Pn,Idiv> 0.32 MW/m2
average NWL on divertor dome <Pn,dome> 0.49 MW/m2
 
Surface Heat Fluxes
average FW surface heat flux <qfw> 0.2 MW/m2
peak FW surface heat flux qfw,max 0.25 MW/m2
peak IB divertor heat flux qdiv,peak,IB 3.9 MW/m2
peak OB divertor heat flux qdiv,peak,OB 10 MW/m2
 
Component Heating
IB blanket nuclear heating  89.3 MW
OB blanket nuclear heating  267.5 MW
IB FW surface heating  18.2 MW
OB FW surface heating  40.1 MW
divertor nuclear heating  42.7 MW
divertor total heating  219.7 MW
structural ring nuclear heating  19.7 MW