A method of producing composite nuclear fuel cladding.

摘要

A method pf producing a composite nuclear fuel cladding lined with a liner of high purity zirconium charaterized in that a raw material of zirconium sponge disposed in a hearth cavity is irradiated with an electron beam while controlling an amount of heat per a unit volume (Ws/mm<3>) according to an oxygen removal rate of the raw material determined by oxygen concentration of the raw material and a target oxygen concentration of an ingot for a liner to be refined, and zircaloy cladding is lined with the liner. The hearth cavity has a preferable shape in which the ratio of the cavity surface to the cavity volume is 0.20mm<-><1> or larger.