Fuel assembly arrangement in nuclear reactors

For centrifugation of the coolant water, screw surface shaped baffles are arranged around the fuel rods with coolant flow from below, e.g. of a boiling water reactor. There are gaps between the baffles; the gaps of all fuel rods lie in the same plane. In order to prevent friction corrosion, the baffles are mounted by means of spring clamps or wire grids in such a manner that there is enough clearance between them and the fuel rod surfaces. A sufficient turbulence is thus achieved and at the same time structural material is saved. (TK)