[en] This study concludes the following results: (a) the lithium-lead blanket achieves a higher tritium breeding ratio with a smaller blanket thickness relative to the lithium blanket, (b) the lithium blanket generates more energy per fusion neutron relative to the lithium-lead, (c) the lithium-6 enrichment is required for the lithium-lead blanket to reduce the blanket thickness, and (d) the energy deposition per fusion neutron reaches a saturation as the blanket thickness, the steel fraction in the reflector, or the reflector zone thickness increases. This allows one to design the blanket for a specific TBR without reducing the energy production