Fuel assembly for a BWR with releasable fasteners between the transition piece and the bottom end-piece

摘要

The present invention relates to a nuclear fuel assembly (1) for a nuclear boiling water reactor comprising :
- a bottom end-piece (3), a top end-piece (4), a bundle of fuel rods (5) extending along a longitudinal direction (L) between the bottom end-piece (3) and the top end-piece (4);
- a fuel channel (10) surrounding the bundle of fuel rods (5) ; and
- a transition piece (16) extending the fuel channel (10) longitudinally downwardly for fitting into a lower core plate (2) of the nuclear boiling water reactor, characterized in that the bottom end-piece (3) and the transition piece (16) comprise releasable complementary fasteners and are releasably fastened to one another through the releasable complementary fasteners.