| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 375 | DD | DECONTAMINATION ARRANGEMENTS; TREATING RADIOACTIVELY CONTAMINATED MATERIAL [G21F-9/00] {5} |
| DIG 379 | DD | .~ Treating liquids [G21F-9/04] {2} |
| DIG 387 | DD | .~.~ Disposal of liquid waste [G21F-9/20] {3} |
| DIG 389 | | .~.~.~ By storage in the ground; by storage underwater (e.g., in ocean) [G21F-9/24] |