| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 207 | DD | MONITORING; TESTING; MAINTAINING [G21C-17/00] {9} |
| DIG 215 | DD | .~ Devices or arrangements for monitoring coolant or moderator [G21C-17/02] {7} |
| DIG 216 | | .~.~ For monitoring liquid coolants or moderators [G21C-17/02B] {1} |
| DIG 217 | DD | .~.~.~> For monitoring liquid metal coolants [G21C-17/02B2] *** (molten metal sampling in general G01N-1/12B) {1} |