| 摘要 |
<p>A nuclear fuel assembly comprising a plurality of vertical fuel rods (10) and possibly occasional water-filled rods, which are surrounded by a fuel channel (1) of substantially square cross-section and which are divided, by means of a vertical channel (7,8) for water of substantially cruciform cross-section, into four groups, each group forming a sub-bundle (25). Each fuel rod contains a stack of nuclear fuel pellets (42), arranged in a cladding tube (41). According to the invention each sub-bundle consists of a total of 25 fuel rods, some of which may be water-filled rods, arranged in a lattice of 5x5 rods. The cladding tube of the fuel rods has a wall thickness of 0,50 - 0,70 mm and an outer diameter of 8,5 - 10,3 mm.</p> |
