| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 207 | DD | MONITORING; TESTING; MAINTAINING [G21C-17/00] {9} |
| DIG 231 | | .~ Devices or arrangements for monitoring or testing fuel or fuel elements (e.g., for burn-up, for contamination, for leak-tightness) not during reactor operation [G21C-17/06] *** (DIG. 235, DIG. 236 take precedence) (detection of leaking fuel elements during reactor operation DIG. 224) {3} |
| DIG 232 | DD | .~.~> Leak-tightness control [G21C-17/06B] *** (DIG. 234 takes precedence) |
| DIG 233 | DD | .~.~> Burn-up control [G21C-17/06D] *** (DIG. 234 takes precedence) |
| DIG 234 | DD | .~.~> Control of spherical elements [G21C-17/06F] |