NUCLEAR REACTOR FUEL ASSEMBLY Russian patent published in 2017 - IPC G21C3/30 

FIELD: physics.

SUBSTANCE: invention relates to fuel assemblies (FA) of VVER-type nuclear reactors (VVER-440, VVER-1000, etc.). In the claimed invention, the FA is equipped with anti-debris filters (ADF) installed in the fuel assembly shanks. The carrier grid of the fuel assembly with the filtering properties (CGF) of the nuclear reactor fuel assembly has curvilinear channels for the passage of the coolant, the inlet of the coolant into and out of the channel shifted by some angle around the axis of the holes for the fuel elements and guide channels to achieve opacity of the CGF is achieved. The upper part of the channel is parallel to the FA axis.

EFFECT: creating a grating structure of a fuel assembly with filter properties of a labyrinth type with increased efficiency in relation to the capture of debris objects of rectilinear shape, which has a coefficient of hydraulic resistance not more than the total coefficient of hydraulic resistance of the carrier grid and the anti-debris filter.

4 cl, 4 dwg