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In a fuel assembly for a nuclear reactor a fuel element spacer formed of an array of laterally positioned cojoined tubular ferrules each providing a passage for one of the fuel elements, the elements being laterally supported in the ferrules between slender spring members and laterally oriented rigi

In a fuel assembly for a nuclear reactor a fuel element spacer formed of an array of laterally positioned cojoined tubular ferrules each providing a passage for one of the fuel elements, the elements being laterally supported in the ferrules between slender spring members and laterally oriented rigid stops.

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A fuel assembly for a nuclear reactor comprising a plurality of elongated elements positioned in spaced array between upper and lower tie plates, at least one spacer positioned intermediate said upper and lower tie plates to provide lateral support for said elements, said spacer comprising a plurali

A fuel assembly for a nuclear reactor comprising a plurality of elongated elements positioned in spaced array between upper and lower tie plates, at least one spacer positioned intermediate said upper and lower tie plates to provide lateral support for said elements, said spacer comprising a plurality of laterally positioned, conjoined tubular ferrules each providing a passage for a respective one of said elements, a selected one of said elements being fitted with a laterally extending lug, the ferrule providing a passage for said selected one of said elements being formed with a vertical slot to provide a passage through said ferrule for said laterally extending lug, a lateral cutout in ferrule wall adjacent said slot for receiving said lug when it is inserted into said slot and said selected one of said elements is rotated to move said lug into said cutout, and antirotation means to prevent subsequent rotation of said one of said elements whereby engagement of said lug in said cutout retains said spacer in its position intermediate said upper and lower tie plates.