Patent ID: 7477719

Claim:
A control rod blade for a boiling water reactor, comprising a plurality of channels each of a predetermined diameter and oriented about a longitudinal axis, said channels being arranged to receive an absorber material, a free edge portion with a recess, which includes outlets for said channels, and a cover element having a cover portion, said cover element being sealingly attached to said free edge portion to seal said recess, said cover portion is positioned outside of said recess and forms an external end surface of said control rod blade in a mounted state, a profile element having a thickness less than the diameter of the channels, wherein said thickness is measured along an axis of said profile element coaxial with said longitudinal axis, said profile element being disposed against a bottom surface defined by the recess; said profile element covers the outlets of said channels and wherein said profile element and said cover element engage one another and cooperate to define at least one passage there between.