Breeding blanket in a thermonuclear device

Purpose: To control the temperature of the breeding material within an allowable temperature range with ease by determining the cross sectional area of a breeding blanket, number of cooling pipes corresponding to the heat generating distribution and the pipeway distribution. Constitution: To the inside of a shell for an outer blanket module constituting the breeding blanket of a thermonuclear device having a torus type plasma-confining vessel, cooling pipes are disposed vertically such that those pipes situating on the blanket center nearer to the plasmas are arranged in a closer pitch. Then, tritium breeding material is filled between the pipes. Coolant flowing gaps in communication with the cooling pipes are disposed to the inside of double-walled ribs for partitioning the inside of the shell into a plurality of parts along the poroidal direction. (Seki, T.)