Device for trapping debris in a nuclear fuel assembly

Abstract

The invention relates to a device for trapping debris in a fuel assembly of a nuclear reactor, which is mounted in the bottom nozzle of the fuel assembly. The device consists of two interconnected plate-type filter elements arranged one above the other and having channels for the passage of a coolant. In the lower filter element, the channels are inclined toward the axis of the fuel assembly, and in the upper filter element, the channels are parallel to the axis of the fuel assembly. The channels can be produced, in particular, by waterjet cutting to form slots in the field of a filter element plate, the slots being separated lengthwise by vertical ribs and widthwise by crosspieces. The vertical ribs and the crosspieces between the channels of each of the filter elements have roundings formed thereon, and a gap is provided between the vertical ribs and crosspieces formed in the plates of different filter elements. The technical result is the possibility of intercepting and trapping debris of any size contained in a coolant loop, without reducing the flow cross section for the coolant.

Dependencies are inferred from the claim text.