Patent Number: 
Section: claims

1. A nuclear reactor fuel assembly, comprising:a plurality of fuel elements, being supported by spacer grids;a top nozzle being comprised of a body, a bearing plate with openings, a locking device and locking device fasteners;a bottom nozzle; anda plurality of guide channels, being supported by said spacer grids and having elements for detachable connection of said guide channels to said top nozzle;wherein said elements for detachable connection of said guide channels have a cross-section greater than a size of said openings,wherein said elements for detachable connection of said guide channels are configured to decrease a respective cross-section thereof so as to pass said elements for detachable connection of said guide channels through respective openings, andwherein said locking device is comprised of a locking device plate and bushes, said bushes and said locking device plate being configured as a single component, each bush being removably engaged to a respective element of a corresponding guide channel when inserted in a respective opening of said bearing plate. 2. The nuclear reactor fuel assembly, according to claim 1, wherein said locking device fasteners are comprised of spring-loaded screws.