Nuclear Reactor Fuel Assembly

Abstract

Fuel assemblies of nuclear reactors that increase the efficiency of the anti-debris filter while maintaining the hydraulic resistance of the fuel assembly at the same level. The nuclear reactor's fuel assembly comprises a head, a fuel elements bundle, spacer grids and an anti-debris filter for the foreign objects retention. The anti-debris filter is installed in the bottom nozzle of a fuel assembly and is made in the form of rectilinear plates' groups, located in the cross section of the bottom nozzle.

Claims

1. The nuclear reactor's fuel assembly, comprising a head, a fuel elements bundle, spacer grids, an anti-debris filter, installed in the bottom nozzle, wherein the anti-debris filter is executed as groups of rectilinear plates, located in the cross section of the bottom nozzle, the upper and lower groups of plates are located at an angle to the longitudinal axis of the fuel assembly and connected by the middle group of plates, which are parallel to the longitudinal axis of the fuel assembly with the formation, along the longitudinal axis of the fuel assembly, of rectangular cross section channels, wherein the channels, formed by the upper and middle groups of plates, are located at an angle of 0 . . . 15 to the longitudinal axis of the fuel assembly, the channels, formed by the middle and lower groups of plates, are located at an angle of 15 . . . 25 to the longitudinal axis of the fuel assembly with an incline, opposite to the incline of the channels, formed by the upper and middle groups of plates; the upper and lower groups of plates are located along the longitudinal axis of the fuel assembly with a gap, the channels, formed by the upper and middle groups of plates are offset relative to the channels, formed by the middle and lower groups of plates in the direction, perpendicular to the longitudinal axis of the fuel assembly.

2. The nuclear reactor's fuel assembly according to claim 1, wherein the anti-debris filter is made of stainless steel using the gas-laser welding.

3. The nuclear reactor's fuel assembly according to claim 1, wherein the anti-debris filter is made of stainless steel using additive technologies.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The invention is illustrated by drawings.

[0043] FIG. 1 is a nuclear reactor's fuel assembly.

[0044] FIG. 2 is a fuel assembly anti-debris filter of a round shape (top view).

[0045] FIG. 3 is a fuel assembly anti-debris filter of a rhombic shape (top view).

[0046] FIG. 4 is a fuel assembly anti-debris filter of a square shape (top view).

[0047] FIG. 5 is a design of a fuel assembly's anti-debris filter.

[0048] FIG. 6 is a plate of the upper group of a fuel assembly's anti-debris filter.

[0049] FIG. 7 is a plate of the middle group of a fuel assembly's anti-debris filter.

[0050] FIG. 8 is a plate of the lower group of a fuel assembly's anti-debris filter.

[0051] The anti-debris filter comprises plates of three groups: the upper group of plates with lower grooves 18, the middle group of plates with double-sided skewed grooves 19, and the lower group of plates with upper grooves 20, forming channels 16-17 for the coolant flow.