Patent Number: 043199607
Section: claims

1. A rack comprising: a plurality of plates of flattened U-shaped cross section;  a plurality of cells, each including four of said plurality of plates interattached to form a compartment therein; and,  said plurality of cells being interattached in a square array forming a plurality of cavities, one between each adjacent pair of said cells, each of said cavities being of smaller cross-sectional area than each of said compartments.  a wall; and,  a plurality of tabs attached to said wall and extending away from the plane of said wall.  said wall of each of said plurality of plates is flat and rectangular having a front side facing the center of said cell, a rear side, a left side and a right side, said wall corresponding to the base of the flattened U-shaped cross-section, said two of said tabs including an elongated left tab and an elongated right tab.  said right tab of each of said four plates of each of said cells is attached to the plate to the right thereof at the left side of the front surface of the wall of said plate to the right thereof, to form, from the walls of said four plates, said compartment being right square prismatic and open on both ends. 2. A rack as in claim 1 wherein each of said plurality of plates includes: 3. A rack as in claim 2 wherein each of said plates includes two of said tabs attached to and extending the length of the longitudinal edges of said wall. 4. A rack as in claim 3 wherein 5. A rack as in claim 4 wherein 6. A rack as in claim 5 wherein each of said plurality of cells are capable of accepting a nuclear fuel assembly in the compartment thereof and said cavities being capable of accepting a neutron absorbing material of sufficient quantity to preclude a sustained nuclear fission chain reaction in the rack.