Fuel channel for a nuclear power boiling water reactor

A fuel channel for a nuclear power boiling water reactor, the fuel channel being configured to include a bundle of fuel rods with nuclear fuel, the fuel channel comprising:

• a sheet material and wherein the fuel channel has an elongated shape and defines a longitudinal direction;
• a plurality of sides which have an elongated shape in said longitudinal direction and which are connected to each other such that a corner with an elongated shape is formed where two adjacent sides meet;
• wherein the sides are connected to each other such that the fuel channel has as many corners as sides;
• wherein each side defines an inside, in the fuel channel, and an outside, at the outside of the fuel channel;
• and
• in at least one of said corners the sheet materials from the two adjacent sides overlap with each other such that there is a corner region with double sheet material consisting of the overlapping sheet material from one of the two sides and the overlapping sheet material from the other of the two sides.