| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 207 | DD | MONITORING; TESTING; MAINTAINING [G21C-17/00] {9} |
| DIG 236 | DD | .~ Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments (e.g., for measuring temperature) [G21C-17/10] {6} |
| DIG 238 | | .~.~ Measuring the reactor flux within the reactor (e.g., within its pressure vessel) [G21C-17/10D] |