Patent Number: 6,310,931

Title: Device and method for locking rods in a bottom tie plate of a fuel assembly

Abstract: The present invention relates to a fuel assembly (1) and a method therefor. The fuel assembly is intended for a light-water cooled nuclear reactor and comprises a first and a second locking member (9a, 9b, 10), a plurality of elongated elements (3, 3a) wherein each of the lower ends of the elongated elements is provided with an end plug (3b). The end plug (3b) is arranged guided or locked in an end plate (6) which comprises at least two adjacently disposed plug holes (6b) for receiving one end plug (3b) each. The first locking member (9a, 9b) is made in an end plug (3b) and has a concave shape and the second locking member (10) is arranged slidable in a locking hole (6c) which is adapted to extend between the two adjacently disposed plug holes (6b) and opening out into these. The second locking member (10) is made with a length exceeding the length of the locking hole (6c) and has end surfaces with shapes intended for cooperation with the concave surface of the first locking member (9a, 9b).

Inventors: Gustafsson; Tommy (Koping, SE), Wallander; Anders (Vaster.ang.s, SE)

Assignee: ABB Atom AB

International Classification: G21C 3/02 (20060101); G21C 5/00 (20060101); G21C 3/12 (20060101); G21C 3/33 (20060101); G21C 5/06 (20060101); G21C 003/326 ()

Expiration Date: 10/30/2018