Abstract: A nuclear reactor fuel bundle assembly including: a fuel bundle including an array of fuel rods and water rods mounted in an upper tie plate and housed in walls of a channel, and a pore type debris shield mounted at least partially in the channel, above or below the upper tie plate, the shield extending to or over the walls of the channel, whereby deflecting and/or capturing falling debris from entering the fuel assembly, wherein the shield is design to be durable, yet flexible, and porous.

Abstract: A debris filter for reactor coolant includes a plurality of adjacent plates defining a plurality of channels therebetween, each of said channels being at an angle to the flow path of the coolant into the filter.

Abstract: A filter for reactor coolant may include a plurality of adjacent plates. Each of the plates may include a plurality of alternating peaks and valleys. The peaks of a first plate of the plurality of adjacent plates and the valleys of a second plate of the plurality of adjacent plates that is adjacent to the first plate may be aligned in parallel such that each peak of the first plate and an associated valley of the second plate define a closed channel. The closed channels may be at an angle to a flow path of the reactor coolant into the filter. The filter may be shaped such that the reactor coolant from the flow path enters the closed channels, flows at the angle, and does not flow between the closed channels.

Abstract: A nuclear reactor fuel bundle assembly including: a fuel bundle including an array of fuel rods and water rods mounted in an upper tie plate and housed in walls of a channel, and a pore type debris shield mounted at least partially in the channel, above or below the upper tie plate, the shield extending to or over the walls of the channel, whereby deflecting and/or capturing falling debris from entering the fuel assembly, wherein the shield is design to be durable, yet flexible, and porous.