Hitachi, Ltd.

Tetsuro Yasuda

Masahisa Inagaki

Jiro Kuniya

Hideo Maki

Iwao Takase

Masayoshi Kanno

Akira Maru

A fuel assembly for a nuclear reactor comprising a fuel cladding tube of three-layer structure having an outer surface in contact with reactor water of the nuclear reactor, an inner surface layer in contact with the nuclear fuel, and an intermediate layer interposed between the outer surface layer and the inner surface layer. the outer surface layer is made of a Zr-based alloy containing Nb, Sn and Mo. The inner surface layer is made of pure zirconium. The intermediate layer is made of a high ductility alloy which is higher in ductility than the outer surface layer and is higher in strength than the inner surface layer.

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Hitachi, Japan

Tetsuro Yasuda