| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 139 | | EMERGENCY PROTECTION ARRANGEMENTS STRUCTALLY ASSOCIATED WITH THE REACTOR (e.g., safety valves provided with pressure equalization devices) [G21C-9/00] *** (emergency cooling arrangements DIG. 196) {6} |
| DIG 140 | DD | .~> Pressure suppression [G21C-9/00B] {2} |
| DIG 143 | DD | .~> Core catchers [G21C-9/00D] |
| DIG 144 | DD | .~> Against explosions (e.g., blast shields) [G21C-9/00F] |
| DIG 145 | DD | .~> Against Na- or Ka- reactions [G21C-9/00I] |
| DIG 146 | DD | .~> Means for effecting very rapid reduction of the reactivity factor under fault conditions (e.g., reactor fuse, control elements having arrangements activated in an emergency) [G21C-9/02] *** (control elements, per se, DIG. 113+) {4} |
| DIG 151 | DD | .~> Means for suppressing fires; Earthquake protection [G21C-9/04] |