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Fuel assembly for nuclear reactor

Image Number 3 for United States Patent #4585614.

A fuel assembly comprises a plurality of fuel rods arranged in a lattice with a combined quadratic and hexagonal geometry, about one-fourth of the total number of fuel rods in the fuel assembly constituting a group of rods at seventeen fuel rod positions among which nine positions are nodal points in a quadratic lattice portion located in the middle of the group.

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