Patent Number: 039403130
Section: claims

1. A nuclear reactor fuel rod comprising a nonmagnetic tubular jacket having an end portion, an end cap closing said end portion, nuclear fuel in said jacket, said fuel and end cap defining therebetween a space inside of said jacket, a capsule-like housing positioned in said space, said housing being made of non-magnetic material and having at least one hole formed therethrough, a mixture of aluminum powder and a water-soluble mercury compound inside of said capsule-like housing, and ferromagnetic material inside of said capsule-like housing, said housing internally forming a space into which said mixture and said material can move. 2. The fuel rod of claim 1 in which said mixture is in the form of a compact body. 3. The fuel rod of claim 2 in which said ferromagnetic material is in the form of a powdered component of said body. 4. The fuel rod of claim 2 in which said ferromagnetic material is in the form of a pellet abutting said body. 5. The fuel rod of claim 2 in which said capsulelike housing contains a cup-like container, said body forms a covering lid for said container and said ferro-magnetic material is contained in said container.