NUCLEAR REACTOR CORE Russian patent published in 2021 - IPC G21C1/02 

FIELD: nuclear power.

SUBSTANCE: invention relates to nuclear power, namely to the core of nuclear reactors with the placement in it of coverless fuel assemblies. The core of a nuclear reactor includes hexagonal coverless fuel assemblies with fuel elements placed along a triangular grid, the spacing of which is greater than the diameter of the fuel element cladding. The fuel elements are equipped with spacer spiral ribs on the cladding and are rigidly fixed with a given angular orientation in such a way that the contact of the fuel elements "edge-by-edge" is ensured at the height at which the maximum cladding temperature of the fuel element is reached during reactor operation. Moreover, the fuel assemblies are arranged so that the fuel elements located on the edges of the fuel assemblies form a single triangular grid with the rest of the fuel elements in the core. The contact of all fuel elements of the core "edge-to-edge" is ensured at the height at which the maximum temperature of the fuel-element cladding is reached during operation of the reactor.

EFFECT: elimination of erroneous placement of fuel assemblies in the core and improvement of heat removal from fuel elements in nuclear reactors.

10 cl, 2 dwg