| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 37 | DD | REACTOR FUEL ELEMENTS AND THEIR ASSEMBLIES; SELECTION OF SUBSTANCES FOR USE AS REACTOR FUEL ELEMENTS [G21C-3/00] {5} |
| DIG 58 | DD | .~ Assemblies of number of fuel elements in the form of a rigid unit [G21C-3/30] {2} |
| DIG 59 | DD | .~.~ Bundles of parallel pin-, rod-, or tube-shaped fuel elements [G21C-3/32] {9} |
| DIG 63 | | .~.~.~ Comprising fuel-elements of various compositions; comprising other pin-, rod-, or tube-like forms [G21C-3/32G] *** (elements influencing the coolant flow DIG. 60) {1} |
| DIG 64 | DD | .~.~.~.~> Special arrangements of elements in the assembly-lattice (e.g., fissile rods, fertile rods, water rods, poison rods, dummy-rods) [G21C-3/32G2] |