Global Nuclear Fuel - Americas, LLC

Global Nuclear Fuel-Japan Co., Ltd.

Daisuke Goto

Russell M Fawcett

Russell Edward Stachowski

Lukas Trosman

Cary L Kunz

Akiko Toishigawa

Shingo Fujimaki

Russell E Stachowski

A fuel assembly has a regular dodecagon fuel rod arrangement with a single fuel rod provided to each apex of a regular dodecagon having lines of length A. Assuming a direction within a horizontal plane is transverse, and a direction perpendicular to the transverse direction is longitudinal, regular dodecagon fuel rod arrangements are arranged in regular intervals in the transverse direction and the longitudinal direction. In the transverse direction, two adjacent regular dodecagon fuel rod arrangements are arranged having opposing two sides of the regular dodecagons parallel to each other with the distance of mA, wherein m is a nonnegative integer, apart from each other. With respect to the longitudinal direction, two adjacent regular dodecagon fuel rod arrangements are arranged so that the opposing two sides of the regular dodecagons are parallel to each other with the distance of nA, wherein n is a nonnegative integer, apart from each other.

Fuel assembly

A reactor fuel bundle includes both full-length fuel rods and part-length fuel rods. The part-length rods are clumped in two groups&#x2014;a first rod group surrounds one or more water passages which are generally centrally disposed in a channel of the fuel bundle, and a second rod group is distributed about an inner perimeter wall of the channel.

Distributed clumping of part-length rods for a reactor fuel bundle

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Kamakura, Japan

Daisuke Goto