| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 113 | DD | CONTROL OF NUCLEAR REACTION [G21C-7/00] {9} |
| DIG 132 | DD | .~ By displacement of the moderator or parts thereof; by changing the moderator concentration [G21C-7/26] {1} |
| DIG 133 | | .~.~ Spectral shift control [G21C-7/26B] |