| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 113 | DD | CONTROL OF NUCLEAR REACTION [G21C-7/00] {9} |
| DIG 117 | DD | .~ By application of neutron-absorbing material (i.e., material with absorption cross section very much in excess of reflection cross section) [G21C-7/06] {3} |
| DIG 118 | DD | .~.~ By displacement of solid control elements (e.g., control rods) [G21C-7/08] {4} |
| DIG 128 | | .~.~.~ Means for obtaining differential movement of control elements [G21C-7/18] |