MIXING AND SPACER GRIDS OF NUCLEAR REACTOR FUEL ASSEMBLY (VERSIONS) Russian patent published in 2017 - IPC G21C3/32 

FIELD: electricity-producing industry.

SUBSTANCE: invention relates to the constructions of the spacer and mixing grids of the nuclear power reactors fuel assembly. The grid construction provides for availability of the rim and the stack of the intercrossing plates in the shape of lines that are linked to each other and to the rim at crossing areas and that form the field of nests for the fuel elements and the fuel assembly supporting elements sinking, at least some nests are hexagonal made. The construction also provides for the availability of the triangular nests for the heat carrier passage that are adjacent to the hexagonal nests. On the triangular nests ends there are mixing laminar deflectors that are turned towards the triangular nests. The nests' field is designed as the full metal matrix of the comb type with the rounded openings in the cross-section for the supporting elements sinking, with the hexagonal section openings for the fuel elements sinking, with the triangular section openings for the heat carrier passage. Along with this, the mixing deflectors are implemented on the end of one of the triangular opening facets with the tilt inward the triangular opening.

EFFECT: nuclear power reactor fuel assembly grids design simplification.

4 cl, 10 dwg